./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1384316659 <...> Warning: Permanently added '10.128.10.18' (ECDSA) to the list of known hosts. execve("./syz-executor1384316659", ["./syz-executor1384316659"], 0x7ffdaebb5500 /* 10 vars */) = 0 brk(NULL) = 0x555556406000 brk(0x555556406d40) = 0x555556406d40 arch_prctl(ARCH_SET_FS, 0x555556406400) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 set_tid_address(0x5555564066d0) = 406 set_robust_list(0x5555564066e0, 24) = 0 rt_sigaction(SIGRTMIN, {sa_handler=0x7f6fa101c9b0, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f6fa101bf00}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=0x7f6fa101ca50, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f6fa101bf00}, NULL, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1384316659", 4096) = 28 brk(0x555556427d40) = 0x555556427d40 brk(0x555556428000) = 0x555556428000 mprotect(0x7f6fa10de000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7f6fa10163f0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f6fa101bf00}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f6fa10163f0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f6fa101bf00}, NULL, 8) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 407 attached , child_tidptr=0x5555564066d0) = 407 [pid 406] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 408 attached [pid 406] <... clone resumed>, child_tidptr=0x5555564066d0) = 408 [pid 406] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] set_robust_list(0x5555564066e0, 24 [pid 407] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 409 attached [pid 406] <... clone resumed>, child_tidptr=0x5555564066d0) = 409 [pid 408] <... set_robust_list resumed>) = 0 [pid 406] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR./strace-static-x86_64: Process 410 attached [pid 406] <... clone resumed>, child_tidptr=0x5555564066d0) = 410 [pid 409] set_robust_list(0x5555564066e0, 24 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 407] <... openat resumed>) = 3 [pid 406] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] set_robust_list(0x5555564066e0, 24 [pid 409] <... set_robust_list resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 410] <... set_robust_list resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 408] ioctl(3, LOOP_CLR_FD [pid 407] ioctl(3, LOOP_CLR_FD [pid 406] <... clone resumed>, child_tidptr=0x5555564066d0) = 411 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 409] <... openat resumed>) = 3 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 406] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] <... openat resumed>) = 3 [pid 409] ioctl(3, LOOP_CLR_FD [pid 408] close(3 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] ioctl(3, LOOP_CLR_FD [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 408] <... close resumed>) = 0 [pid 406] <... clone resumed>, child_tidptr=0x5555564066d0) = 412 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] close(3 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] close(3 [pid 410] close(3 [pid 409] <... close resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 415 [pid 407] <... close resumed>) = 0 ./strace-static-x86_64: Process 411 attached [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 411] set_robust_list(0x5555564066e0, 24 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 416 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 417 [pid 411] <... set_robust_list resumed>) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 418 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR./strace-static-x86_64: Process 412 attached [pid 412] set_robust_list(0x5555564066e0, 24 [pid 411] <... openat resumed>) = 3 [pid 412] <... set_robust_list resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 411] close(3./strace-static-x86_64: Process 418 attached [pid 412] ioctl(3, LOOP_CLR_FD [pid 411] <... close resumed>) = 0 [pid 418] set_robust_list(0x5555564066e0, 24 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 418] <... set_robust_list resumed>) = 0 [pid 412] close(3 [pid 418] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 419 [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 416 attached [pid 416] set_robust_list(0x5555564066e0, 24 [pid 418] <... prctl resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 420 [pid 418] setpgid(0, 0) = 0 [pid 418] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 416] <... set_robust_list resumed>) = 0 [pid 416] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 417 attached ) = 0 [pid 418] <... openat resumed>) = 3 [pid 417] set_robust_list(0x5555564066e0, 24 [pid 416] setpgid(0, 0./strace-static-x86_64: Process 420 attached ./strace-static-x86_64: Process 419 attached [pid 417] <... set_robust_list resumed>) = 0 [pid 416] <... setpgid resumed>) = 0 [pid 420] set_robust_list(0x5555564066e0, 24 [pid 418] write(3, "1000", 4 [pid 417] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 416] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 415 attached [pid 419] set_robust_list(0x5555564066e0, 24 [pid 418] <... write resumed>) = 4 [pid 416] <... openat resumed>) = 3 [pid 420] <... set_robust_list resumed>) = 0 [pid 417] <... prctl resumed>) = 0 [pid 418] close(3 [pid 416] write(3, "1000", 4 [pid 418] <... close resumed>) = 0 [pid 416] <... write resumed>) = 4 [pid 418] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 416] close(3 [pid 420] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 419] <... set_robust_list resumed>) = 0 [pid 418] <... futex resumed>) = 0 [pid 417] setpgid(0, 0 [pid 416] <... close resumed>) = 0 [pid 415] set_robust_list(0x5555564066e0, 24 [pid 418] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 416] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 417] <... setpgid resumed>) = 0 [pid 420] <... prctl resumed>) = 0 [pid 419] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 418] <... mmap resumed>) = 0x7f6fa0feb000 [pid 416] <... futex resumed>) = 0 [pid 415] <... set_robust_list resumed>) = 0 [pid 418] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 416] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 417] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 420] setpgid(0, 0 [pid 419] <... prctl resumed>) = 0 [pid 418] <... mprotect resumed>) = 0 [pid 416] <... mmap resumed>) = 0x7f6fa0feb000 [pid 415] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 418] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 416] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 420] <... setpgid resumed>) = 0 [pid 419] setpgid(0, 0 [pid 417] <... openat resumed>) = 3 [pid 416] <... mprotect resumed>) = 0 [pid 415] <... prctl resumed>) = 0 [pid 420] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 419] <... setpgid resumed>) = 0 [pid 418] <... clone resumed>, parent_tid=[421], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 421 [pid 417] write(3, "1000", 4 [pid 416] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 415] setpgid(0, 0 [pid 420] <... openat resumed>) = 3 [pid 419] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 418] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 417] <... write resumed>) = 4 [pid 415] <... setpgid resumed>) = 0 [pid 420] write(3, "1000", 4 [pid 418] <... futex resumed>) = 0 [pid 417] close(3 [pid 416] <... clone resumed>, parent_tid=[422], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 422 [pid 419] <... openat resumed>) = 3 [pid 418] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 416] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 420] <... write resumed>) = 4 [pid 419] write(3, "1000", 4 [pid 418] <... futex resumed>) = 0 [pid 417] <... close resumed>) = 0 [pid 416] <... futex resumed>) = 0 [pid 418] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 416] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] <... openat resumed>) = 3 [pid 418] <... mmap resumed>) = 0x7f6fa0fca000 [pid 416] <... futex resumed>) = 0 [pid 418] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 416] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 420] close(3 [pid 419] <... write resumed>) = 4 [pid 418] <... mprotect resumed>) = 0 [pid 417] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 416] <... mmap resumed>) = 0x7f6fa0fca000 [pid 415] write(3, "1000", 4 [pid 418] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 416] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 417] <... futex resumed>) = 0 [pid 420] <... close resumed>) = 0 [pid 419] close(3 [pid 415] <... write resumed>) = 4 [pid 416] <... mprotect resumed>) = 0 [pid 420] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 419] <... close resumed>) = 0 [pid 417] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 415] close(3 [pid 418] <... clone resumed>, parent_tid=[423], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 423 [pid 416] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 420] <... futex resumed>) = 0 [pid 419] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 418] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 417] <... mmap resumed>) = 0x7f6fa0feb000 [pid 415] <... close resumed>) = 0 [pid 418] <... futex resumed>) = 0 [pid 416] <... clone resumed>, parent_tid=[424], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 424 [pid 420] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 419] <... futex resumed>) = 0 [pid 418] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 417] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 416] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 420] <... mmap resumed>) = 0x7f6fa0feb000 [pid 419] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 417] <... mprotect resumed>) = 0 [pid 416] <... futex resumed>) = 0 [pid 415] <... futex resumed>) = 0 [pid 420] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 419] <... mmap resumed>) = 0x7f6fa0feb000 [pid 417] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 416] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 420] <... mprotect resumed>) = 0 [pid 419] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 415] <... mmap resumed>) = 0x7f6fa0feb000 [pid 420] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 419] <... mprotect resumed>) = 0 [pid 417] <... clone resumed>, parent_tid=[425], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 425 [pid 415] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 422 attached [pid 417] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 419] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 422] set_robust_list(0x7f6fa100b9e0, 24 [pid 420] <... clone resumed>, parent_tid=[426], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 426 [pid 417] <... futex resumed>) = 0 [pid 415] <... mprotect resumed>) = 0 [pid 422] <... set_robust_list resumed>) = 0 [pid 420] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 417] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 420] <... futex resumed>) = 0 [pid 419] <... clone resumed>, parent_tid=[427], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 427 [pid 417] <... futex resumed>) = 0 [pid 417] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 420] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 419] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 417] <... mmap resumed>) = 0x7f6fa0fca000 [pid 415] <... clone resumed>, parent_tid=[428], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 428 [pid 420] <... futex resumed>) = 0 [pid 419] <... futex resumed>) = 0 [pid 417] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 420] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 419] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 420] <... mmap resumed>) = 0x7f6fa0fca000 [pid 419] <... futex resumed>) = 0 [pid 417] <... mprotect resumed>) = 0 [pid 420] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 419] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 420] <... mprotect resumed>) = 0 [pid 417] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 419] <... mmap resumed>) = 0x7f6fa0fca000 [pid 420] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 422] memfd_create("syzkaller", 0 [pid 419] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 424 attached [pid 422] <... memfd_create resumed>) = 3 [pid 420] <... clone resumed>, parent_tid=[430], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 430 [pid 419] <... mprotect resumed>) = 0 [pid 417] <... clone resumed>, parent_tid=[429], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 429 [pid 415] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 423 attached [pid 424] set_robust_list(0x7f6fa0fea9e0, 24 [pid 422] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 420] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 419] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 417] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] <... futex resumed>) = 0 [pid 424] <... set_robust_list resumed>) = 0 [pid 423] set_robust_list(0x7f6fa0fea9e0, 24 [pid 422] <... mmap resumed>) = 0x7f6f98bca000 [pid 420] <... futex resumed>) = 0 [pid 417] <... futex resumed>) = 0 [pid 415] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 429 attached ./strace-static-x86_64: Process 427 attached [pid 424] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 423] <... set_robust_list resumed>) = 0 [pid 420] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 419] <... clone resumed>, parent_tid=[431], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 431 [pid 417] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 415] <... futex resumed>) = 0 [pid 429] set_robust_list(0x7f6fa0fea9e0, 24 [pid 427] set_robust_list(0x7f6fa100b9e0, 24 [pid 424] <... open resumed>) = 4 [pid 423] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 429] <... set_robust_list resumed>) = 0 [pid 427] <... set_robust_list resumed>) = 0 [pid 424] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 423] <... open resumed>) = 3 [pid 429] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 427] memfd_create("syzkaller", 0 [pid 424] <... futex resumed>) = 1 [pid 423] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 422] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 419] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 416] <... futex resumed>) = 0 [pid 415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0./strace-static-x86_64: Process 431 attached ./strace-static-x86_64: Process 430 attached ./strace-static-x86_64: Process 428 attached ./strace-static-x86_64: Process 426 attached ./strace-static-x86_64: Process 425 attached [pid 429] <... open resumed>) = 3 [pid 427] <... memfd_create resumed>) = 3 [pid 424] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 423] <... futex resumed>) = 1 [pid 419] <... futex resumed>) = 0 [pid 418] <... futex resumed>) = 0 [pid 416] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] <... mmap resumed>) = 0x7f6fa0fca000 ./strace-static-x86_64: Process 421 attached [pid 431] set_robust_list(0x7f6fa0fea9e0, 24 [pid 430] set_robust_list(0x7f6fa0fea9e0, 24 [pid 429] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 428] set_robust_list(0x7f6fa100b9e0, 24 [pid 427] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 426] set_robust_list(0x7f6fa100b9e0, 24 [pid 425] set_robust_list(0x7f6fa100b9e0, 24 [pid 424] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 18.758427][ T30] audit: type=1400 audit(1673157241.129:62): avc: denied { execmem } for pid=406 comm="syz-executor138" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 18.765796][ T30] audit: type=1400 audit(1673157241.129:63): avc: denied { read write } for pid=407 comm="syz-executor138" name="loop0" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 18.769781][ T30] audit: type=1400 audit(1673157241.129:64): avc: denied { open } for pid=407 comm="syz-executor138" path="/dev/loop0" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 18.773362][ T30] audit: type=1400 audit(1673157241.129:65): avc: denied { ioctl } for pid=408 comm="syz-executor138" path="/dev/loop1" dev="devtmpfs" ino=112 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 423] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 419] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 418] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 416] <... futex resumed>) = 0 [pid 415] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 431] <... set_robust_list resumed>) = 0 [pid 430] <... set_robust_list resumed>) = 0 [pid 429] <... futex resumed>) = 1 [pid 428] <... set_robust_list resumed>) = 0 [pid 427] <... mmap resumed>) = 0x7f6f98bca000 [pid 426] <... set_robust_list resumed>) = 0 [pid 425] <... set_robust_list resumed>) = 0 [pid 424] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 422] <... write resumed>) = 1048576 [pid 421] set_robust_list(0x7f6fa100b9e0, 24 [pid 417] <... futex resumed>) = 0 [pid 415] <... mprotect resumed>) = 0 [pid 431] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 430] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 428] memfd_create("syzkaller", 0 [pid 426] memfd_create("syzkaller", 0 [pid 425] memfd_create("syzkaller", 0 [pid 422] munmap(0x7f6f98bca000, 1048576 [pid 421] <... set_robust_list resumed>) = 0 [pid 415] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 431] <... open resumed>) = 4 [pid 430] <... open resumed>) = 3 [pid 428] <... memfd_create resumed>) = 3 [pid 426] <... memfd_create resumed>) = 4 [pid 425] <... memfd_create resumed>) = 4 [pid 422] <... munmap resumed>) = 0 [pid 421] memfd_create("syzkaller", 0 [pid 431] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 428] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 426] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 425] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 422] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 421] <... memfd_create resumed>) = 4 [pid 415] <... clone resumed>, parent_tid=[432], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 432 [pid 431] <... futex resumed>) = 1 [pid 430] <... futex resumed>) = 1 [pid 428] <... mmap resumed>) = 0x7f6f98bca000 [pid 426] <... mmap resumed>) = 0x7f6f98bca000 [pid 425] <... mmap resumed>) = 0x7f6f98bca000 [pid 422] <... openat resumed>) = 5 [pid 421] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 420] <... futex resumed>) = 0 [pid 419] <... futex resumed>) = 0 [pid 415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 432 attached [pid 431] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 429] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 428] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 427] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 426] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 424] <... mount resumed>) = 0 [pid 423] <... mount resumed>) = 0 [pid 421] <... mmap resumed>) = 0x7f6f98bca000 [pid 420] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 419] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 418] <... futex resumed>) = 0 [pid 417] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 416] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 415] <... futex resumed>) = 0 [pid 432] set_robust_list(0x7f6fa0fea9e0, 24 [pid 431] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 430] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 429] <... mount resumed>) = 0 [pid 428] <... write resumed>) = 1048576 [pid 426] <... write resumed>) = 1048576 [pid 425] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [ 18.810545][ T30] audit: type=1400 audit(1673157241.179:66): avc: denied { mounton } for pid=418 comm="syz-executor138" path="/root/bus" dev="sda1" ino=1138 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=file permissive=1 [pid 422] ioctl(5, LOOP_SET_FD, 3 [pid 421] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 420] <... futex resumed>) = 0 [pid 419] <... futex resumed>) = 0 [pid 415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 432] <... set_robust_list resumed>) = 0 [pid 431] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 430] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 429] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 428] munmap(0x7f6f98bca000, 1048576 [pid 427] <... write resumed>) = 1048576 [pid 426] munmap(0x7f6f98bca000, 1048576 [pid 425] <... write resumed>) = 1048576 [pid 424] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 423] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 418] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 417] <... futex resumed>) = 0 [pid 416] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 432] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 429] <... futex resumed>) = 0 [pid 427] munmap(0x7f6f98bca000, 1048576 [pid 424] <... futex resumed>) = 0 [pid 423] <... futex resumed>) = 0 [pid 418] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 417] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 416] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 432] <... open resumed>) = 4 [pid 429] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 427] <... munmap resumed>) = 0 [pid 424] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 423] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 418] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 417] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 416] <... futex resumed>) = 0 [pid 432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 427] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 424] <... open resumed>) = 6 [pid 423] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 418] <... futex resumed>) = 0 [pid 417] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 416] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 432] <... futex resumed>) = 0 [pid 429] <... futex resumed>) = 0 [pid 427] <... openat resumed>) = 5 [pid 424] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 423] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 418] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 417] <... futex resumed>) = 1 [pid 416] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 432] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 429] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 427] ioctl(5, LOOP_SET_FD, 3 [pid 424] <... futex resumed>) = 0 [pid 423] <... open resumed>) = 5 [pid 420] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 417] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 419] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 416] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 431] <... mount resumed>) = 0 [pid 430] <... mount resumed>) = 0 [pid 429] <... open resumed>) = 5 [pid 428] <... munmap resumed>) = 0 [pid 427] <... ioctl resumed>) = 0 [pid 426] <... munmap resumed>) = 0 [pid 425] munmap(0x7f6f98bca000, 1048576 [pid 424] openat(-1, "/proc/self/exe", O_RDONLY [pid 423] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 421] <... write resumed>) = 1048576 [pid 416] <... futex resumed>) = 0 [pid 429] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 427] close(3 [pid 424] <... openat resumed>) = 7 [pid 423] <... futex resumed>) = 1 [pid 418] <... futex resumed>) = 0 [pid 416] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 431] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 429] <... futex resumed>) = 1 [pid 428] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 427] <... close resumed>) = 0 [pid 426] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 424] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 423] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 418] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 417] <... futex resumed>) = 0 [pid 416] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 432] <... futex resumed>) = 0 [pid 431] <... futex resumed>) = 1 [pid 430] <... futex resumed>) = 1 [pid 429] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 428] <... openat resumed>) = 5 [pid 427] mkdir("./bus", 0777 [pid 426] <... openat resumed>) = 5 [pid 425] <... munmap resumed>) = 0 [pid 424] <... futex resumed>) = 0 [pid 423] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 421] munmap(0x7f6f98bca000, 1048576 [pid 420] <... futex resumed>) = 0 [pid 419] <... futex resumed>) = 0 [pid 418] <... futex resumed>) = 0 [pid 417] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 416] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] <... futex resumed>) = 1 [pid 432] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 431] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 429] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 428] ioctl(5, LOOP_SET_FD, 3 [pid 427] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 426] ioctl(5, LOOP_SET_FD, 4 [pid 425] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 424] sendfile(6, 7, NULL, 140737974943952 [pid 423] openat(-1, "/proc/self/exe", O_RDONLY [pid 421] <... munmap resumed>) = 0 [pid 420] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 419] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 418] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 417] <... futex resumed>) = 0 [pid 416] <... futex resumed>) = 0 [pid 415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 432] <... mount resumed>) = 0 [pid 431] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 430] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 429] openat(-1, "/proc/self/exe", O_RDONLY [pid 427] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 424] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 423] <... openat resumed>) = 6 [pid 417] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 416] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 431] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 430] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 429] <... openat resumed>) = 6 [pid 428] <... ioctl resumed>) = 0 [pid 424] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 423] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 420] <... futex resumed>) = 0 [pid 419] <... futex resumed>) = 0 [pid 416] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 429] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 424] <... futex resumed>) = 0 [pid 423] <... futex resumed>) = 1 [pid 418] <... futex resumed>) = 0 [pid 429] <... futex resumed>) = 1 [pid 424] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 423] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 418] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 417] <... futex resumed>) = 0 [pid 429] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 423] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 418] <... futex resumed>) = 0 [pid 417] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 429] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 423] sendfile(5, 6, NULL, 140737974943952 [pid 418] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 417] <... futex resumed>) = 0 [pid 429] sendfile(5, 6, NULL, 140737974943952 [pid 423] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 417] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 431] <... open resumed>) = 3 [pid 430] <... open resumed>) = 6 [pid 428] close(3 [pid 426] <... ioctl resumed>) = 0 [pid 425] <... openat resumed>) = 7 [pid 422] <... ioctl resumed>) = 0 [pid 421] openat(AT_FDCWD, "/dev/loop0", O_RDWR [ 18.837607][ T30] audit: type=1400 audit(1673157241.209:67): avc: denied { mounton } for pid=417 comm="syz-executor138" path="/root/bus" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 18.852793][ T422] loop2: detected capacity change from 0 to 2048 [ 18.868401][ T427] loop4: detected capacity change from 0 to 2048 [ 18.877715][ T428] loop1: detected capacity change from 0 to 2048 [ 18.884169][ T426] loop5: detected capacity change from 0 to 2048 [ 18.885451][ T92] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [pid 420] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 419] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 432] <... futex resumed>) = 1 [pid 431] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 428] <... close resumed>) = 0 [pid 426] close(4 [pid 425] ioctl(7, LOOP_SET_FD, 4 [pid 422] close(3 [pid 421] <... openat resumed>) = 7 [pid 420] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 419] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 415] <... futex resumed>) = 0 [pid 432] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 431] <... futex resumed>) = 0 [pid 430] <... futex resumed>) = 0 [pid 429] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 428] mkdir("./bus", 0777 [pid 426] <... close resumed>) = 0 [pid 423] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 418] <... futex resumed>) = 0 [pid 423] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 421] ioctl(7, LOOP_SET_FD, 4 [pid 420] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 419] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 432] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 431] openat(-1, "/proc/self/exe", O_RDONLY [pid 430] openat(-1, "/proc/self/exe", O_RDONLY [pid 429] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 422] <... close resumed>) = 0 [pid 422] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 422] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 432] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 430] <... openat resumed>) = 4 [pid 431] <... openat resumed>) = 6 [pid 429] <... futex resumed>) = 1 [pid 420] <... futex resumed>) = 0 [pid 419] <... futex resumed>) = 0 [pid 417] <... futex resumed>) = 0 [pid 415] <... futex resumed>) = 0 [pid 432] <... open resumed>) = 3 [pid 431] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 429] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 420] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 419] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 431] <... futex resumed>) = 0 [pid 430] <... futex resumed>) = 0 [pid 420] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 419] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 415] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 432] <... futex resumed>) = 0 [pid 431] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 420] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 419] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 432] openat(-1, "/proc/self/exe", O_RDONLY [pid 431] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 430] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 420] <... futex resumed>) = 0 [pid 419] <... futex resumed>) = 0 [pid 415] <... futex resumed>) = 0 [pid 432] <... openat resumed>) = 6 [pid 431] sendfile(3, 6, NULL, 140737974943952 [pid 430] sendfile(6, 4, NULL, 140737974943952 [pid 420] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 419] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 415] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 432] <... futex resumed>) = 0 [pid 415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 432] sendfile(3, 6, NULL, 140737974943952 [pid 415] <... futex resumed>) = 0 [pid 415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 428] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 428] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 426] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 426] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 428] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 425] <... ioctl resumed>) = 0 [pid 421] <... ioctl resumed>) = 0 [pid 428] ioctl(5, LOOP_CLR_FD [pid 425] close(4 [pid 430] <... sendfile resumed>) = 1048576 [pid 428] <... ioctl resumed>) = 0 [pid 425] <... close resumed>) = 0 [pid 432] <... sendfile resumed>) = 1048576 [pid 430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 428] close(5 [pid 425] mkdir("./bus", 0777 [pid 432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 431] <... sendfile resumed>) = 1048576 [pid 430] <... futex resumed>) = 1 [pid 428] <... close resumed>) = 0 [pid 425] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 420] <... futex resumed>) = 0 [pid 428] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 425] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 421] close(4 [pid 432] <... futex resumed>) = 1 [pid 431] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 428] <... futex resumed>) = 0 [pid 415] <... futex resumed>) = 0 [pid 428] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 421] <... close resumed>) = 0 [pid 421] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 421] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 415] exit_group(0) = ? [pid 428] <... futex resumed>) = ? [pid 428] +++ exited with 0 +++ [ 18.901471][ T92] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 18.913453][ T425] loop3: detected capacity change from 0 to 2048 [ 18.919993][ T421] loop0: detected capacity change from 0 to 2048 [ 18.934772][ T428] EXT4-fs (loop1): VFS: Can't find ext4 filesystem [pid 431] <... futex resumed>) = 1 [pid 419] <... futex resumed>) = 0 [pid 431] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 432] +++ exited with 0 +++ [pid 415] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=415, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 441 ./strace-static-x86_64: Process 441 attached [pid 441] set_robust_list(0x5555564066e0, 24) = 0 [pid 441] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 441] setpgid(0, 0) = 0 [pid 441] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 441] write(3, "1000", 4) = 4 [pid 441] close(3) = 0 [pid 441] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 441] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 441] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 441] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[445], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 445 [pid 441] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 441] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 441] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 441] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 441] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[446], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 446 [pid 441] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 18.954534][ T427] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 18.976733][ T30] audit: type=1400 audit(1673157241.349:68): avc: denied { mount } for pid=419 comm="syz-executor138" name="/" dev="loop4" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [pid 441] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 446 attached ./strace-static-x86_64: Process 445 attached [pid 446] set_robust_list(0x7f6fa0fea9e0, 24 [pid 445] set_robust_list(0x7f6fa100b9e0, 24 [pid 446] <... set_robust_list resumed>) = 0 [pid 445] <... set_robust_list resumed>) = 0 [pid 441] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 441] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 441] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fa9000 [pid 441] mprotect(0x7f6fa0faa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 441] clone(child_stack=0x7f6fa0fc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[450], tls=0x7f6fa0fc9700, child_tidptr=0x7f6fa0fc99d0) = 450 [pid 441] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 18.978444][ T422] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.003659][ T427] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.014427][ T422] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.024343][ T426] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.033096][ T421] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 441] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 450 attached [pid 450] set_robust_list(0x7f6fa0fc99e0, 24) = 0 [pid 450] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 450] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 441] <... futex resumed>) = 0 [pid 441] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 441] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 450] <... futex resumed>) = 1 [pid 450] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 450] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 441] <... futex resumed>) = 0 [pid 441] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 441] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 450] <... futex resumed>) = 1 [pid 450] openat(-1, "/proc/self/exe", O_RDONLY) = 4 [pid 450] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 441] <... futex resumed>) = 0 [pid 441] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 441] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 450] <... futex resumed>) = 1 [pid 450] sendfile(3, 4, NULL, 140737974943952) = 1048576 [pid 450] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 441] <... futex resumed>) = 0 [pid 450] <... futex resumed>) = 1 [pid 450] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 446] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 445] memfd_create("syzkaller", 0 [pid 446] <... open resumed>) = 5 [pid 445] <... memfd_create resumed>) = 6 [pid 446] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 445] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 446] <... futex resumed>) = 0 [pid 445] <... mmap resumed>) = 0x7f6f98ba9000 [pid 446] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 445] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 427] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 422] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 422] ioctl(5, LOOP_CLR_FD [pid 427] ioctl(5, LOOP_CLR_FD [pid 445] <... write resumed>) = 1048576 [pid 426] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 445] munmap(0x7f6f98ba9000, 1048576 [pid 426] ioctl(5, LOOP_CLR_FD) = 0 [pid 426] close(5 [pid 445] <... munmap resumed>) = 0 [pid 445] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 426] <... close resumed>) = 0 [pid 421] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 426] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 420] exit_group(0 [pid 426] <... futex resumed>) = 0 [pid 426] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 430] <... futex resumed>) = ? [pid 420] <... exit_group resumed>) = ? [pid 426] +++ exited with 0 +++ [pid 445] <... openat resumed>) = 7 [pid 430] +++ exited with 0 +++ [pid 425] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 421] ioctl(7, LOOP_CLR_FD [pid 420] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=420, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 445] ioctl(7, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 445] ioctl(7, LOOP_CLR_FD) = 0 [pid 425] ioctl(7, LOOP_CLR_FD) = 0 [pid 425] close(7) = 0 [pid 425] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 445] ioctl(7, LOOP_SET_FD, 6 [pid 425] <... futex resumed>) = 0 [pid 417] exit_group(0 [pid 445] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 429] <... futex resumed>) = ? [pid 417] <... exit_group resumed>) = ? [pid 445] close(7 [pid 429] +++ exited with 0 +++ [pid 445] <... close resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 445] close(6) = 0 [pid 445] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 445] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 441] exit_group(0 [pid 450] <... futex resumed>) = ? [pid 446] <... futex resumed>) = ? [pid 445] <... futex resumed>) = ? [pid 441] <... exit_group resumed>) = ? [pid 450] +++ exited with 0 +++ [pid 446] +++ exited with 0 +++ [pid 445] +++ exited with 0 +++ [pid 441] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=441, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 451 ./strace-static-x86_64: Process 451 attached [pid 451] set_robust_list(0x5555564066e0, 24 [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 452 ./strace-static-x86_64: Process 452 attached [pid 452] set_robust_list(0x5555564066e0, 24) = 0 [pid 452] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 452] setpgid(0, 0) = 0 [pid 425] +++ exited with 0 +++ [pid 417] +++ exited with 0 +++ [pid 452] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=417, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 452] <... openat resumed>) = 3 [pid 452] write(3, "1000", 4) = 4 [pid 452] close(3) = 0 [pid 452] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 452] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 452] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 452] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[453], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 453 [pid 452] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 422] <... ioctl resumed>) = 0 [pid 452] <... futex resumed>) = 0 [pid 452] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 452] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 452] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 452] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[454], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 454 [pid 452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 454 attached [pid 454] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 454] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 452] <... futex resumed>) = 0 [pid 452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 454] <... futex resumed>) = 1 [pid 454] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 427] <... ioctl resumed>) = 0 [pid 454] <... mount resumed>) = 0 [pid 454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 452] <... futex resumed>) = 0 [pid 452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 454] <... futex resumed>) = 1 [pid 454] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 452] <... futex resumed>) = 0 [pid 452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 454] <... futex resumed>) = 1 [pid 454] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 452] <... futex resumed>) = 0 [pid 452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 421] <... ioctl resumed>) = 0 [pid 452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 454] <... futex resumed>) = 1 [pid 454] sendfile(4, 5, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 452] <... futex resumed>) = 0 [pid 454] <... futex resumed>) = 1 [pid 454] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 453 attached [pid 453] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 453] memfd_create("syzkaller", 0) = 6 [pid 453] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD [pid 421] close(7 [pid 427] close(5 [pid 422] close(5 [pid 410] <... ioctl resumed>) = 0 [pid 421] <... close resumed>) = 0 [pid 410] close(3) = 0 [pid 422] <... close resumed>) = 0 [ 19.060372][ T425] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.072586][ T426] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.074173][ T425] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.086919][ T421] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 422] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 421] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 455 [pid 427] <... close resumed>) = 0 [pid 422] <... futex resumed>) = 0 [pid 421] <... futex resumed>) = 0 [pid 422] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 421] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 427] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 418] exit_group(0 [pid 427] <... futex resumed>) = 0 [pid 416] exit_group(0) = ? [pid 424] <... futex resumed>) = ? [pid 418] <... exit_group resumed>) = ? [pid 424] +++ exited with 0 +++ [pid 423] <... futex resumed>) = ? [pid 423] +++ exited with 0 +++ [pid 419] exit_group(0 [pid 431] <... futex resumed>) = ? [pid 419] <... exit_group resumed>) = ? [pid 431] +++ exited with 0 +++ [pid 422] <... futex resumed>) = ? [pid 421] <... futex resumed>) = ? [pid 453] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 422] +++ exited with 0 +++ [pid 416] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=416, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 409] restart_syscall(<... resuming interrupted clone ...>) = 0 ./strace-static-x86_64: Process 455 attached [pid 455] set_robust_list(0x5555564066e0, 24 [pid 427] +++ exited with 0 +++ [pid 419] +++ exited with 0 +++ [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=419, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 455] <... set_robust_list resumed>) = 0 [pid 455] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 409] <... openat resumed>) = 3 [pid 455] <... prctl resumed>) = 0 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3 [pid 455] setpgid(0, 0 [pid 409] <... close resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 455] <... setpgid resumed>) = 0 [pid 455] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 456 [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 457 [pid 455] <... openat resumed>) = 3 [pid 455] write(3, "1000", 4) = 4 [pid 455] close(3) = 0 [pid 455] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 455] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 455] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 455] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[458], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 458 [pid 455] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 455] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 455] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 455] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 455] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 451] <... set_robust_list resumed>) = 0 [pid 451] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 455] <... clone resumed>, parent_tid=[459], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 459 [pid 451] <... prctl resumed>) = 0 [pid 455] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 455] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 451] setpgid(0, 0) = 0 [pid 451] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 451] write(3, "1000", 4) = 4 [pid 453] <... write resumed>) = 1048576 [pid 451] close(3 [pid 453] munmap(0x7f6f98bca000, 1048576) = 0 [pid 451] <... close resumed>) = 0 ./strace-static-x86_64: Process 457 attached [pid 451] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 451] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 457] set_robust_list(0x5555564066e0, 24) = 0 [pid 453] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 457] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 453] ioctl(7, LOOP_SET_FD, 6 [pid 451] <... mmap resumed>) = 0x7f6fa0feb000 [pid 457] <... prctl resumed>) = 0 [pid 457] setpgid(0, 0) = 0 [pid 457] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 459 attached ./strace-static-x86_64: Process 458 attached ./strace-static-x86_64: Process 456 attached ) = 3 [pid 453] <... ioctl resumed>) = 0 [pid 451] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 456] set_robust_list(0x5555564066e0, 24 [pid 451] <... mprotect resumed>) = 0 [pid 453] close(6 [pid 456] <... set_robust_list resumed>) = 0 [pid 451] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 460 attached [pid 459] set_robust_list(0x7f6fa0fea9e0, 24 [pid 456] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 453] <... close resumed>) = 0 [pid 460] set_robust_list(0x7f6fa100b9e0, 24 [pid 459] <... set_robust_list resumed>) = 0 [pid 457] write(3, "1000", 4 [pid 456] <... prctl resumed>) = 0 [pid 453] mkdir("./bus", 0777 [pid 451] <... clone resumed>, parent_tid=[460], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 460 [pid 460] <... set_robust_list resumed>) = 0 [pid 459] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 457] <... write resumed>) = 4 [pid 456] setpgid(0, 0 [pid 453] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 451] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 459] <... open resumed>) = 3 [pid 458] set_robust_list(0x7f6fa100b9e0, 24 [pid 457] close(3 [pid 456] <... setpgid resumed>) = 0 [pid 453] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 451] <... futex resumed>) = 0 [pid 459] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 458] <... set_robust_list resumed>) = 0 [pid 457] <... close resumed>) = 0 [pid 456] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 451] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 459] <... futex resumed>) = 1 [pid 458] memfd_create("syzkaller", 0 [pid 457] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 456] <... openat resumed>) = 3 [pid 455] <... futex resumed>) = 0 [pid 451] <... futex resumed>) = 0 [pid 459] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 458] <... memfd_create resumed>) = 4 [pid 457] <... futex resumed>) = 0 [pid 456] write(3, "1000", 4 [pid 455] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 451] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 460] memfd_create("syzkaller", 0 [pid 459] <... mount resumed>) = 0 [pid 458] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 457] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 456] <... write resumed>) = 4 [pid 455] <... futex resumed>) = 0 [pid 451] <... mmap resumed>) = 0x7f6fa0fca000 [pid 459] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 458] <... mmap resumed>) = 0x7f6f98bca000 [pid 457] <... mmap resumed>) = 0x7f6fa0feb000 [pid 456] close(3 [pid 455] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 451] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 460] <... memfd_create resumed>) = 3 [pid 459] <... futex resumed>) = 0 [pid 457] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 456] <... close resumed>) = 0 [pid 451] <... mprotect resumed>) = 0 [pid 421] +++ exited with 0 +++ [pid 418] +++ exited with 0 +++ [pid 459] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 457] <... mprotect resumed>) = 0 [pid 456] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 451] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 457] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 456] <... futex resumed>) = 0 [pid 456] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 451] <... clone resumed>, parent_tid=[464], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 464 [pid 457] <... clone resumed>, parent_tid=[465], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 465 [pid 456] <... mmap resumed>) = 0x7f6fa0feb000 [pid 451] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 457] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 456] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 451] <... futex resumed>) = 0 [pid 457] <... futex resumed>) = 0 [pid 456] <... mprotect resumed>) = 0 [pid 451] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 457] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 456] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 457] <... futex resumed>) = 0 [pid 458] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 457] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 456] <... clone resumed>, parent_tid=[466], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 466 [pid 457] <... mmap resumed>) = 0x7f6fa0fca000 [pid 456] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 457] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 456] <... futex resumed>) = 0 [pid 457] <... mprotect resumed>) = 0 [pid 456] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 457] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 456] <... futex resumed>) = 0 [pid 456] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 457] <... clone resumed>, parent_tid=[467], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 467 [pid 456] <... mmap resumed>) = 0x7f6fa0fca000 [pid 457] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 456] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 457] <... futex resumed>) = 0 [pid 456] <... mprotect resumed>) = 0 [pid 457] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 456] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[468], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 468 [pid 456] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 456] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 460] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 455] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=418, si_uid=0, si_status=0, si_utime=0, si_stime=8} --- ./strace-static-x86_64: Process 468 attached ./strace-static-x86_64: Process 466 attached ./strace-static-x86_64: Process 464 attached [pid 468] set_robust_list(0x7f6fa0fea9e0, 24 [pid 466] set_robust_list(0x7f6fa100b9e0, 24 [pid 464] set_robust_list(0x7f6fa0fea9e0, 24 [pid 460] <... mmap resumed>) = 0x7f6f98bca000 [pid 455] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 465 attached [pid 465] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 465] memfd_create("syzkaller", 0) = 3 [pid 465] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 458] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 467 attached [pid 467] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 467] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 467] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 457] <... futex resumed>) = 0 [pid 457] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 457] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 467] <... futex resumed>) = 1 [pid 467] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 467] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 457] <... futex resumed>) = 0 [pid 467] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 457] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 467] <... open resumed>) = 5 [pid 457] <... futex resumed>) = 0 [pid 467] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 458] munmap(0x7f6f98bca000, 1048576 [pid 457] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 467] <... futex resumed>) = 0 [pid 458] <... munmap resumed>) = 0 [pid 457] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 467] openat(-1, "/proc/self/exe", O_RDONLY [pid 458] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 457] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 467] <... openat resumed>) = 6 [pid 458] <... openat resumed>) = 5 [pid 457] <... futex resumed>) = 0 [pid 467] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 458] ioctl(5, LOOP_SET_FD, 4 [pid 457] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 468] <... set_robust_list resumed>) = 0 [pid 467] <... futex resumed>) = 0 [pid 466] <... set_robust_list resumed>) = 0 [pid 464] <... set_robust_list resumed>) = 0 [pid 460] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 459] <... futex resumed>) = 0 [pid 457] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 455] <... futex resumed>) = 1 [pid 467] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 468] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 466] memfd_create("syzkaller", 0 [pid 464] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 459] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 457] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 467] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 459] <... open resumed>) = 6 [pid 457] <... futex resumed>) = 0 [pid 467] sendfile(5, 6, NULL, 140737974943952 [pid 459] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 457] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 467] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 459] <... futex resumed>) = 0 [pid 467] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 459] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 467] <... futex resumed>) = 1 [pid 457] <... futex resumed>) = 0 [pid 467] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 468] <... open resumed>) = 3 [pid 466] <... memfd_create resumed>) = 4 [pid 464] <... open resumed>) = 4 [pid 460] <... write resumed>) = 1048576 [pid 455] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 466] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 464] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 460] munmap(0x7f6f98bca000, 1048576 [pid 455] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 453] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 468] <... futex resumed>) = 1 [pid 464] <... futex resumed>) = 1 [pid 456] <... futex resumed>) = 0 [pid 466] <... mmap resumed>) = 0x7f6f98bca000 [pid 455] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 451] <... futex resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 468] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 465] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 464] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 460] <... munmap resumed>) = 0 [pid 456] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 451] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 459] <... futex resumed>) = 0 [pid 455] <... futex resumed>) = 1 [pid 407] ioctl(3, LOOP_CLR_FD [pid 468] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 465] <... write resumed>) = 1048576 [pid 464] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 459] openat(-1, "/proc/self/exe", O_RDONLY [pid 456] <... futex resumed>) = 0 [pid 455] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 451] <... futex resumed>) = 0 [pid 468] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 466] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 464] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 460] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 459] <... openat resumed>) = 7 [pid 458] <... ioctl resumed>) = 0 [pid 453] ioctl(7, LOOP_CLR_FD [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 468] <... mount resumed>) = 0 [pid 466] <... write resumed>) = 1048576 [pid 465] munmap(0x7f6f98bca000, 1048576 [pid 464] <... mount resumed>) = 0 [pid 460] <... openat resumed>) = 5 [pid 458] close(4 [pid 456] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 453] <... ioctl resumed>) = 0 [pid 451] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] close(3 [pid 468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 466] munmap(0x7f6f98bca000, 1048576 [pid 464] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 460] ioctl(5, LOOP_SET_FD, 3 [pid 459] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 458] <... close resumed>) = 0 [pid 456] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 453] close(7 [pid 451] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... close resumed>) = 0 [pid 468] <... futex resumed>) = 0 [pid 466] <... munmap resumed>) = 0 [pid 465] <... munmap resumed>) = 0 [pid 464] <... futex resumed>) = 0 [pid 460] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 459] <... futex resumed>) = 1 [pid 458] mkdir("./bus", 0777 [pid 456] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 455] <... futex resumed>) = 0 [pid 453] <... close resumed>) = 0 [pid 451] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 468] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 466] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 465] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 464] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 460] ioctl(5, LOOP_CLR_FD [pid 459] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 458] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 456] <... futex resumed>) = 0 [pid 455] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 453] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 452] exit_group(0 [pid 451] <... futex resumed>) = 0 [pid 468] <... open resumed>) = 5 [pid 466] <... openat resumed>) = 6 [pid 465] <... openat resumed>) = 7 [pid 464] <... open resumed>) = 6 [pid 460] <... ioctl resumed>) = 0 [pid 459] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 458] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 456] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 455] <... futex resumed>) = 0 [pid 454] <... futex resumed>) = ? [pid 453] <... futex resumed>) = ? [pid 452] <... exit_group resumed>) = ? [pid 451] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 469 [ 19.161017][ T453] loop5: detected capacity change from 0 to 2048 [ 19.177415][ T453] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.191632][ T453] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.198886][ T458] loop3: detected capacity change from 0 to 2048 [pid 468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 466] ioctl(6, LOOP_SET_FD, 4 [pid 465] ioctl(7, LOOP_SET_FD, 3 [pid 464] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 459] sendfile(6, 7, NULL, 140737974943952 [pid 456] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 455] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 454] +++ exited with 0 +++ [pid 453] +++ exited with 0 +++ ./strace-static-x86_64: Process 469 attached [pid 468] <... futex resumed>) = 0 [pid 464] <... futex resumed>) = 0 [pid 452] +++ exited with 0 +++ [pid 451] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 468] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 466] <... ioctl resumed>) = 0 [pid 464] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 466] close(4) = 0 [pid 460] ioctl(5, LOOP_SET_FD, 3 [pid 466] mkdir("./bus", 0777 [pid 460] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 466] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 460] close(5 [pid 466] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 460] <... close resumed>) = 0 [pid 460] close(3) = 0 [pid 460] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 460] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 469] set_robust_list(0x5555564066e0, 24 [pid 456] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 451] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=452, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 468] <... futex resumed>) = 0 [pid 460] <... futex resumed>) = 0 [pid 456] <... futex resumed>) = 1 [pid 451] <... futex resumed>) = 1 [pid 468] openat(-1, "/proc/self/exe", O_RDONLY [pid 460] openat(-1, "/proc/self/exe", O_RDONLY [pid 456] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 451] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 468] <... openat resumed>) = 4 [pid 460] <... openat resumed>) = 3 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 460] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... openat resumed>) = 3 [pid 469] <... set_robust_list resumed>) = 0 [pid 468] <... futex resumed>) = 1 [pid 460] <... futex resumed>) = 1 [pid 456] <... futex resumed>) = 0 [pid 451] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 469] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 468] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 460] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 456] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 451] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... ioctl resumed>) = 0 [pid 468] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 460] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 459] <... sendfile resumed>) = -1 EIO (Input/output error) [ 19.237131][ T466] loop2: detected capacity change from 0 to 2048 [ 19.243832][ T465] loop4: detected capacity change from 0 to 2048 [ 19.250260][ T92] blk_update_request: I/O error, dev loop4, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 19.262137][ T92] blk_update_request: I/O error, dev loop4, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [pid 456] <... futex resumed>) = 0 [pid 451] <... futex resumed>) = 0 [pid 412] close(3 [pid 469] <... prctl resumed>) = 0 [pid 468] sendfile(5, 4, NULL, 140737974943952 [pid 465] <... ioctl resumed>) = 0 [pid 460] sendfile(6, 3, NULL, 140737974943952 [pid 459] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 456] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 451] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... close resumed>) = 0 [pid 465] close(3 [pid 459] <... futex resumed>) = 1 [pid 455] <... futex resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 465] <... close resumed>) = 0 [pid 465] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 465] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 459] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 476 [pid 460] <... sendfile resumed>) = 1048576 [pid 468] <... sendfile resumed>) = 1048576 [pid 460] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 469] setpgid(0, 0) = 0 [pid 469] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 469] write(3, "1000", 4) = 4 [pid 469] close(3) = 0 [pid 469] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 469] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 469] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 469] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[478], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 478 [pid 469] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 469] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 469] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 469] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 469] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[479], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 479 [pid 469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 479 attached [pid 479] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 479] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 469] <... futex resumed>) = 0 [pid 469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 479] <... futex resumed>) = 1 [pid 479] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 469] <... futex resumed>) = 0 [pid 469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 479] <... futex resumed>) = 1 [pid 479] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 460] <... futex resumed>) = 0 [pid 456] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 451] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 468] <... futex resumed>) = 0 [pid 460] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 451] exit_group(0 [pid 468] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 464] <... futex resumed>) = ? [pid 460] <... futex resumed>) = ? [pid 451] <... exit_group resumed>) = ? [pid 464] +++ exited with 0 +++ ./strace-static-x86_64: Process 476 attached [pid 476] set_robust_list(0x5555564066e0, 24) = 0 [pid 476] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 460] +++ exited with 0 +++ [pid 451] +++ exited with 0 +++ [pid 476] setpgid(0, 0) = 0 [pid 476] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=451, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 476] <... openat resumed>) = 3 [pid 476] write(3, "1000", 4) = 4 [pid 476] close(3 [pid 408] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 476] <... close resumed>) = 0 [pid 476] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 476] <... futex resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 476] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 476] <... mmap resumed>) = 0x7f6fa0feb000 [pid 408] close(3 [pid 476] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 408] <... close resumed>) = 0 [pid 476] <... mprotect resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 476] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[480], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 480 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 481 [pid 476] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 476] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 476] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 476] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 476] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[482], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 482 [pid 476] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 476] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 480 attached [pid 480] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 480] memfd_create("syzkaller", 0) = 3 [pid 480] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 458] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 458] ioctl(5, LOOP_CLR_FD) = 0 [pid 458] close(5) = 0 [pid 458] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 458] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 455] exit_group(0) = ? [pid 459] <... futex resumed>) = ? [pid 458] <... futex resumed>) = ? [pid 458] +++ exited with 0 +++ [pid 480] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 480] munmap(0x7f6f98bca000, 1048576) = 0 [ 19.282299][ T458] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.311621][ T466] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.326027][ T458] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 480] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 479] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 481 attached [pid 481] set_robust_list(0x5555564066e0, 24) = 0 [pid 481] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 481] setpgid(0, 0) = 0 [pid 481] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 481] write(3, "1000", 4) = 4 [pid 481] close(3) = 0 [pid 481] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 481] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 481] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 481] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[484], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 484 [pid 481] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 469] <... futex resumed>) = 0 [pid 469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 479] <... futex resumed>) = 0 [pid 479] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 469] <... futex resumed>) = 0 [pid 469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 482 attached ./strace-static-x86_64: Process 478 attached [pid 479] sendfile(4, 5, NULL, 140737974943952 [pid 469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 484 attached [pid 482] set_robust_list(0x7f6fa0fea9e0, 24 [pid 479] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 478] set_robust_list(0x7f6fa100b9e0, 24 [pid 465] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 482] <... set_robust_list resumed>) = 0 [pid 479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 478] <... set_robust_list resumed>) = 0 [pid 465] ioctl(7, LOOP_CLR_FD [pid 482] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 484] set_robust_list(0x7f6fa100b9e0, 24 [pid 481] <... futex resumed>) = 0 [pid 479] <... futex resumed>) = 1 [pid 478] memfd_create("syzkaller", 0 [pid 469] <... futex resumed>) = 0 [pid 465] <... ioctl resumed>) = 0 [pid 484] <... set_robust_list resumed>) = 0 [pid 482] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 481] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 479] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 478] <... memfd_create resumed>) = 6 [pid 466] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 465] close(7 [pid 482] <... futex resumed>) = 1 [pid 478] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 476] <... futex resumed>) = 0 [pid 466] ioctl(6, LOOP_CLR_FD [pid 465] <... close resumed>) = 0 [pid 482] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 478] <... mmap resumed>) = 0x7f6f98bca000 [pid 476] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 465] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 484] memfd_create("syzkaller", 0 [pid 482] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 481] <... futex resumed>) = 0 [pid 484] <... memfd_create resumed>) = 3 [pid 481] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 484] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 481] <... mmap resumed>) = 0x7f6fa0fca000 [pid 484] <... mmap resumed>) = 0x7f6f98bca000 [pid 481] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 457] exit_group(0 [pid 481] <... mprotect resumed>) = 0 [pid 457] <... exit_group resumed>) = ? [pid 482] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 481] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 478] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 476] <... futex resumed>) = 0 [pid 467] <... futex resumed>) = ? [pid 465] <... futex resumed>) = ? [pid 480] <... openat resumed>) = 4 [pid 482] <... mount resumed>) = 0 [pid 480] ioctl(4, LOOP_SET_FD, 3 [pid 478] <... write resumed>) = 1048576 [pid 476] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 467] +++ exited with 0 +++ [pid 459] +++ exited with 0 +++ [pid 455] +++ exited with 0 +++ [pid 482] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 478] munmap(0x7f6f98bca000, 1048576 [pid 476] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 19.355224][ T465] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.361474][ T466] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.369341][ T465] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 482] <... futex resumed>) = 0 [pid 478] <... munmap resumed>) = 0 [pid 476] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 482] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 478] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 476] <... futex resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=455, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 481] <... clone resumed>, parent_tid=[485], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 485 [pid 482] <... open resumed>) = 6 [pid 480] <... ioctl resumed>) = 0 [pid 478] <... openat resumed>) = 7 [pid 476] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 482] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 480] close(3 [pid 478] ioctl(7, LOOP_SET_FD, 6 [pid 476] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 485 attached [pid 484] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 482] <... futex resumed>) = 0 [pid 481] <... futex resumed>) = 0 [pid 476] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 485] set_robust_list(0x7f6fa0fea9e0, 24 [pid 481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 485] <... set_robust_list resumed>) = 0 [pid 484] <... write resumed>) = 1048576 [pid 485] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 485] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 481] <... futex resumed>) = 0 [pid 485] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 485] <... mount resumed>) = 0 [pid 481] <... futex resumed>) = 0 [pid 485] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 484] munmap(0x7f6f98bca000, 1048576 [pid 482] openat(-1, "/proc/self/exe", O_RDONLY [pid 481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 480] <... close resumed>) = 0 [pid 478] <... ioctl resumed>) = 0 [pid 476] <... futex resumed>) = 0 [pid 485] <... futex resumed>) = 0 [pid 484] <... munmap resumed>) = 0 [pid 482] <... openat resumed>) = 3 [pid 481] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 480] mkdir("./bus", 0777 [pid 478] close(6 [pid 476] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 485] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 482] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 480] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 478] <... close resumed>) = 0 [pid 476] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 485] <... open resumed>) = 5 [pid 484] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 482] <... futex resumed>) = 0 [pid 481] <... futex resumed>) = 0 [pid 480] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 478] mkdir("./bus", 0777 [pid 476] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 485] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 482] sendfile(6, 3, NULL, 140737974943952 [pid 481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 485] <... futex resumed>) = 0 [pid 481] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 476] <... futex resumed>) = 0 [pid 485] openat(-1, "/proc/self/exe", O_RDONLY [pid 481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 485] <... openat resumed>) = 6 [pid 481] <... futex resumed>) = 0 [pid 485] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 485] <... futex resumed>) = 0 [pid 481] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 485] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 485] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 481] <... futex resumed>) = 0 [pid 485] sendfile(5, 6, NULL, 140737974943952 [pid 481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 485] <... sendfile resumed>) = 1048576 [pid 476] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 485] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 481] <... futex resumed>) = 0 [pid 485] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 484] <... openat resumed>) = 7 [pid 484] ioctl(7, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 484] ioctl(7, LOOP_CLR_FD) = 0 [pid 478] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 478] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 484] ioctl(7, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 484] close(7) = 0 [pid 484] close(3 [pid 466] <... ioctl resumed>) = 0 [pid 466] close(6 [pid 482] <... sendfile resumed>) = 1048576 [pid 480] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 466] <... close resumed>) = 0 [pid 484] <... close resumed>) = 0 [pid 482] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 480] ioctl(4, LOOP_CLR_FD [pid 466] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 465] +++ exited with 0 +++ [pid 457] +++ exited with 0 +++ [pid 410] <... openat resumed>) = 3 [pid 482] <... futex resumed>) = 1 [pid 480] <... ioctl resumed>) = 0 [pid 476] <... futex resumed>) = 0 [pid 466] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 484] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 466] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [ 19.400589][ T480] loop5: detected capacity change from 0 to 2048 [ 19.408271][ T478] loop0: detected capacity change from 0 to 2048 [ 19.418343][ T480] EXT4-fs (loop5): VFS: Can't find ext4 filesystem [ 19.433050][ T478] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 456] exit_group(0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=457, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 484] <... futex resumed>) = 0 [pid 481] exit_group(0 [pid 468] <... futex resumed>) = ? [pid 466] <... futex resumed>) = ? [pid 456] <... exit_group resumed>) = ? [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 410] close(3 [pid 485] <... futex resumed>) = ? [pid 482] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 481] <... exit_group resumed>) = ? [pid 480] close(4 [pid 478] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 468] +++ exited with 0 +++ [pid 466] +++ exited with 0 +++ [pid 411] <... restart_syscall resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 485] +++ exited with 0 +++ [pid 480] <... close resumed>) = 0 [pid 478] ioctl(7, LOOP_CLR_FD [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 480] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 478] <... ioctl resumed>) = 0 [pid 480] <... futex resumed>) = 0 [pid 478] close(7 [pid 476] exit_group(0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 482] <... futex resumed>) = ? [pid 478] <... close resumed>) = 0 [pid 476] <... exit_group resumed>) = ? [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 488 ./strace-static-x86_64: Process 488 attached [pid 484] +++ exited with 0 +++ [pid 482] +++ exited with 0 +++ [pid 481] +++ exited with 0 +++ [pid 480] +++ exited with 0 +++ [pid 478] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 469] exit_group(0 [pid 488] set_robust_list(0x5555564066e0, 24 [pid 479] <... futex resumed>) = ? [pid 469] <... exit_group resumed>) = ? [pid 488] <... set_robust_list resumed>) = 0 [pid 479] +++ exited with 0 +++ [pid 478] <... futex resumed>) = ? [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=481, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 488] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 488] <... prctl resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 488] setpgid(0, 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 488] <... setpgid resumed>) = 0 [pid 408] <... ioctl resumed>) = 0 [pid 488] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 478] +++ exited with 0 +++ [pid 469] +++ exited with 0 +++ [pid 408] close(3 [pid 488] <... openat resumed>) = 3 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=469, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 488] write(3, "1000", 4) = 4 [pid 488] close(3 [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 488] <... close resumed>) = 0 [pid 488] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... restart_syscall resumed>) = 0 [pid 488] <... futex resumed>) = 0 [pid 488] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 488] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 488] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 407] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD [pid 488] <... clone resumed>, parent_tid=[489], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 489 [pid 407] <... ioctl resumed>) = 0 [pid 488] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] close(3 [pid 488] <... futex resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 488] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 488] <... futex resumed>) = 0 [pid 488] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 488] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 488] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 489 attached [pid 456] +++ exited with 0 +++ [pid 411] <... openat resumed>) = 3 [pid 408] <... close resumed>) = 0 [pid 488] <... clone resumed>, parent_tid=[491], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 491 [pid 411] ioctl(3, LOOP_CLR_FD [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=456, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 488] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 488] <... futex resumed>) = 0 [pid 411] close(3 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 492 [pid 488] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 493 ./strace-static-x86_64: Process 490 attached [pid 490] set_robust_list(0x5555564066e0, 24 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 494 [pid 490] <... set_robust_list resumed>) = 0 [pid 490] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 490 [pid 490] <... prctl resumed>) = 0 [pid 490] setpgid(0, 0) = 0 [pid 490] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 ./strace-static-x86_64: Process 492 attached [pid 492] set_robust_list(0x5555564066e0, 24 [pid 490] write(3, "1000", 4) = 4 [pid 490] close(3) = 0 [pid 492] <... set_robust_list resumed>) = 0 [pid 492] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 490] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 490] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 490] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 490] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 492] <... prctl resumed>) = 0 ./strace-static-x86_64: Process 491 attached [pid 492] setpgid(0, 0 [pid 491] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 492] <... setpgid resumed>) = 0 [pid 491] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 492] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 491] <... open resumed>) = 3 [pid 492] <... openat resumed>) = 3 [pid 491] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 488] <... futex resumed>) = 0 [pid 488] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 488] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 491] <... futex resumed>) = 1 [pid 491] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 492] write(3, "1000", 4) = 4 [pid 490] <... clone resumed>, parent_tid=[495], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 495 [pid 492] close(3 [pid 491] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 490] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 492] <... close resumed>) = 0 [pid 491] <... futex resumed>) = 1 [pid 490] <... futex resumed>) = 0 [pid 488] <... futex resumed>) = 0 [pid 492] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 491] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 490] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 488] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 492] <... futex resumed>) = 0 [pid 491] <... open resumed>) = 4 [pid 490] <... futex resumed>) = 0 [pid 488] <... futex resumed>) = 0 [pid 492] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 491] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 490] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 488] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 492] <... mmap resumed>) = 0x7f6fa0feb000 [pid 491] <... futex resumed>) = 0 [pid 490] <... mmap resumed>) = 0x7f6fa0fca000 [pid 488] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 492] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 491] openat(-1, "/proc/self/exe", O_RDONLY [pid 490] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 488] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 494 attached [pid 492] <... mprotect resumed>) = 0 [pid 491] <... openat resumed>) = 5 [pid 490] <... mprotect resumed>) = 0 [pid 488] <... futex resumed>) = 0 [pid 494] set_robust_list(0x5555564066e0, 24 [pid 492] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 491] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 490] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 488] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 494] <... set_robust_list resumed>) = 0 [pid 491] <... futex resumed>) = 0 [pid 488] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 488] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 488] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 494] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 492] <... clone resumed>, parent_tid=[497], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 497 [pid 491] sendfile(4, 5, NULL, 140737974943952 [pid 490] <... clone resumed>, parent_tid=[496], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 496 [pid 494] <... prctl resumed>) = 0 [pid 492] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 491] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 490] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 494] setpgid(0, 0 [pid 492] <... futex resumed>) = 0 [pid 491] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 490] <... futex resumed>) = 0 [pid 494] <... setpgid resumed>) = 0 [pid 492] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 491] <... futex resumed>) = 1 [pid 490] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 488] <... futex resumed>) = 0 [pid 494] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 492] <... futex resumed>) = 0 [pid 491] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 494] <... openat resumed>) = 3 ./strace-static-x86_64: Process 495 attached [pid 494] write(3, "1000", 4 [pid 492] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 495] set_robust_list(0x7f6fa100b9e0, 24 [pid 494] <... write resumed>) = 4 [pid 492] <... mmap resumed>) = 0x7f6fa0fca000 [pid 495] <... set_robust_list resumed>) = 0 [pid 494] close(3 [pid 492] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 495] memfd_create("syzkaller", 0 [pid 494] <... close resumed>) = 0 [pid 492] <... mprotect resumed>) = 0 ./strace-static-x86_64: Process 496 attached [pid 495] <... memfd_create resumed>) = 3 [pid 494] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 492] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 496] set_robust_list(0x7f6fa0fea9e0, 24 [pid 495] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 494] <... futex resumed>) = 0 [pid 496] <... set_robust_list resumed>) = 0 [pid 495] <... mmap resumed>) = 0x7f6f98bca000 [pid 494] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 492] <... clone resumed>, parent_tid=[498], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 498 ./strace-static-x86_64: Process 497 attached ./strace-static-x86_64: Process 493 attached [pid 496] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 494] <... mmap resumed>) = 0x7f6fa0feb000 [pid 492] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 489] set_robust_list(0x7f6fa100b9e0, 24 [pid 497] set_robust_list(0x7f6fa100b9e0, 24 [pid 496] <... open resumed>) = 4 [pid 495] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 494] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 493] set_robust_list(0x5555564066e0, 24 [pid 492] <... futex resumed>) = 0 [pid 489] <... set_robust_list resumed>) = 0 [pid 496] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 494] <... mprotect resumed>) = 0 [pid 492] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 496] <... futex resumed>) = 1 [pid 494] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 490] <... futex resumed>) = 0 [pid 496] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 490] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 496] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 494] <... clone resumed>, parent_tid=[499], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 499 [pid 490] <... futex resumed>) = 0 [pid 496] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 494] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 490] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 496] <... mount resumed>) = 0 [pid 494] <... futex resumed>) = 0 [pid 496] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 494] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 496] <... futex resumed>) = 1 [pid 494] <... futex resumed>) = 0 [pid 490] <... futex resumed>) = 0 [pid 496] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 494] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 490] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 496] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 494] <... mmap resumed>) = 0x7f6fa0fca000 [pid 490] <... futex resumed>) = 0 [pid 496] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 494] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 490] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 494] <... mprotect resumed>) = 0 [ 19.447226][ T478] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 494] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 499 attached ./strace-static-x86_64: Process 498 attached [pid 497] <... set_robust_list resumed>) = 0 [pid 495] <... write resumed>) = 1048576 [pid 493] <... set_robust_list resumed>) = 0 [pid 489] memfd_create("syzkaller", 0 [pid 498] set_robust_list(0x7f6fa0fea9e0, 24 [pid 494] <... clone resumed>, parent_tid=[500], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 500 [pid 498] <... set_robust_list resumed>) = 0 [pid 494] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 489] <... memfd_create resumed>) = 6 [pid 498] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 497] memfd_create("syzkaller", 0 [pid 494] <... futex resumed>) = 0 [pid 489] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 494] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 495] munmap(0x7f6f98bca000, 1048576) = 0 [pid 489] <... mmap resumed>) = 0x7f6f98bca000 [pid 495] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 493] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 500 attached [pid 500] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 500] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 499] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 499] memfd_create("syzkaller", 0) = 4 [pid 499] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 497] <... memfd_create resumed>) = 4 [pid 497] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 493] <... prctl resumed>) = 0 [pid 497] <... mmap resumed>) = 0x7f6f98bca000 [pid 493] setpgid(0, 0) = 0 [pid 493] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 493] write(3, "1000", 4 [pid 489] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 493] <... write resumed>) = 4 [pid 493] close(3 [pid 499] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 493] <... close resumed>) = 0 [pid 493] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 493] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 493] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 493] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[501], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 501 [pid 493] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 493] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 493] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 493] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 493] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 499] <... write resumed>) = 1048576 [pid 499] munmap(0x7f6f98bca000, 1048576 [pid 493] <... clone resumed>, parent_tid=[502], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 502 [pid 499] <... munmap resumed>) = 0 [pid 499] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 5 [pid 499] ioctl(5, LOOP_SET_FD, 4 [pid 497] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 500] <... open resumed>) = 3 [pid 498] <... open resumed>) = 3 [pid 496] <... open resumed>) = 5 [pid 495] <... openat resumed>) = 6 [pid 476] +++ exited with 0 +++ [pid 500] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 498] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 496] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 495] ioctl(6, LOOP_SET_FD, 3./strace-static-x86_64: Process 502 attached ./strace-static-x86_64: Process 501 attached [pid 500] <... futex resumed>) = 1 [pid 499] <... ioctl resumed>) = 0 [pid 498] <... futex resumed>) = 1 [pid 497] <... write resumed>) = 1048576 [pid 496] <... futex resumed>) = 1 [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 490] <... futex resumed>) = 0 [pid 489] <... write resumed>) = 1048576 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=476, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 500] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 498] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 496] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 494] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 492] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 490] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 500] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 498] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 496] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 490] <... futex resumed>) = 0 [pid 500] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 498] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 496] openat(-1, "/proc/self/exe", O_RDONLY [pid 494] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 492] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 490] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 501] set_robust_list(0x7f6fa100b9e0, 24 [pid 500] <... mount resumed>) = 0 [pid 498] <... mount resumed>) = 0 [pid 497] munmap(0x7f6f98bca000, 1048576 [pid 496] <... openat resumed>) = 7 [pid 489] munmap(0x7f6f98bca000, 1048576 [pid 500] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 498] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 496] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 500] <... futex resumed>) = 1 [pid 498] <... futex resumed>) = 1 [pid 496] <... futex resumed>) = 1 [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 490] <... futex resumed>) = 0 [pid 501] <... set_robust_list resumed>) = 0 [pid 500] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 498] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 496] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 494] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 492] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 490] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 489] <... munmap resumed>) = 0 [pid 501] memfd_create("syzkaller", 0 [pid 500] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 498] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 497] <... munmap resumed>) = 0 [pid 496] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 490] <... futex resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 489] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 502] set_robust_list(0x7f6fa0fea9e0, 24 [pid 500] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 499] close(4 [pid 498] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 496] sendfile(5, 7, NULL, 140737974943952 [pid 494] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 492] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 490] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 502] <... set_robust_list resumed>) = 0 [pid 501] <... memfd_create resumed>) = 3 [pid 500] <... open resumed>) = 6 [pid 499] <... close resumed>) = 0 [pid 498] <... open resumed>) = 5 [pid 497] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 496] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 495] <... ioctl resumed>) = 0 [pid 489] <... openat resumed>) = 7 [pid 412] <... openat resumed>) = 3 [pid 500] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 498] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 496] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 500] <... futex resumed>) = 1 [pid 498] <... futex resumed>) = 1 [pid 496] <... futex resumed>) = 1 [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 490] <... futex resumed>) = 0 [pid 502] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 501] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 500] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 498] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 497] <... openat resumed>) = 6 [pid 496] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 494] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 492] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 489] ioctl(7, LOOP_SET_FD, 6 [pid 412] ioctl(3, LOOP_CLR_FD [pid 500] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 498] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 500] openat(-1, "/proc/self/exe", O_RDONLY [pid 498] openat(-1, "/proc/self/exe", O_RDONLY [pid 494] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 492] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 501] <... mmap resumed>) = 0x7f6f98bca000 [pid 500] <... openat resumed>) = 4 [pid 498] <... openat resumed>) = 7 [pid 500] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 498] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 500] <... futex resumed>) = 1 [pid 498] <... futex resumed>) = 1 [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 500] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 498] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 494] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 492] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 500] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 498] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 500] sendfile(6, 4, NULL, 140737974943952 [pid 498] sendfile(5, 7, NULL, 140737974943952 [pid 494] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 492] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 500] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 498] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 500] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 498] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 500] <... futex resumed>) = 1 [pid 498] <... futex resumed>) = 1 [pid 494] <... futex resumed>) = 0 [pid 492] <... futex resumed>) = 0 [pid 500] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 498] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 502] <... open resumed>) = 4 [ 19.513834][ T499] loop2: detected capacity change from 0 to 2048 [ 19.521070][ T495] loop0: detected capacity change from 0 to 2048 [ 19.530793][ T120] blk_update_request: I/O error, dev loop0, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 19.541955][ T120] blk_update_request: I/O error, dev loop0, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 19.555448][ T489] loop3: detected capacity change from 0 to 2048 [pid 501] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 499] mkdir("./bus", 0777 [pid 497] ioctl(6, LOOP_SET_FD, 4 [pid 495] close(3 [pid 493] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 501] <... write resumed>) = 1048576 [pid 489] <... ioctl resumed>) = 0 [pid 489] close(6) = 0 [pid 489] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 489] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] close(3 [pid 502] <... futex resumed>) = 0 [pid 502] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 493] <... futex resumed>) = 0 [pid 502] <... mount resumed>) = 0 [pid 501] munmap(0x7f6f98bca000, 1048576 [pid 499] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 495] <... close resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 501] <... munmap resumed>) = 0 [pid 499] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 497] <... ioctl resumed>) = 0 [pid 495] mkdir("./bus", 0777 [pid 493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 502] <... futex resumed>) = 0 [pid 501] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 497] close(4 [pid 495] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 493] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 501] <... openat resumed>) = 5 [pid 497] <... close resumed>) = 0 [pid 495] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 503 ./strace-static-x86_64: Process 503 attached [pid 502] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 501] ioctl(5, LOOP_SET_FD, 3 [pid 493] <... futex resumed>) = 0 [pid 502] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 503] set_robust_list(0x5555564066e0, 24 [pid 502] <... open resumed>) = 6 [pid 502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 503] <... set_robust_list resumed>) = 0 [pid 502] <... futex resumed>) = 1 [pid 493] <... futex resumed>) = 0 [pid 502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 502] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 493] <... futex resumed>) = 0 [pid 502] openat(-1, "/proc/self/exe", O_RDONLY [pid 493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 503] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 502] <... openat resumed>) = 7 [pid 503] <... prctl resumed>) = 0 [pid 502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 503] setpgid(0, 0 [pid 502] <... futex resumed>) = 1 [pid 493] <... futex resumed>) = 0 [pid 502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 503] <... setpgid resumed>) = 0 [pid 502] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 493] <... futex resumed>) = 0 [pid 503] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 502] sendfile(6, 7, NULL, 140737974943952 [pid 493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 503] <... openat resumed>) = 3 [pid 502] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 503] write(3, "1000", 4) = 4 [pid 503] close(3) = 0 [pid 503] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 503] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 503] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 503] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[507], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 507 [pid 503] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 503] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 503] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 503] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 503] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[508], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 508 [pid 503] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 503] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 507 attached [pid 507] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 507] memfd_create("syzkaller", 0) = 3 [pid 507] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 493] <... futex resumed>) = 0 [pid 497] mkdir("./bus", 0777 [pid 507] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 497] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 497] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 507] <... write resumed>) = 1048576 [pid 507] munmap(0x7f6f98bca000, 1048576) = 0 [pid 507] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [pid 507] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 507] close(3) = 0 [pid 507] mkdir("./bus", 0777) = -1 EEXIST (File exists) [ 19.571257][ T497] loop1: detected capacity change from 0 to 2048 [ 19.589489][ T501] loop4: detected capacity change from 0 to 2048 [ 19.605175][ T507] loop5: detected capacity change from 0 to 2048 [pid 507] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 501] <... ioctl resumed>) = 0 [pid 501] close(3) = 0 [pid 501] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 501] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 508 attached [pid 508] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 508] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 508] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 503] <... futex resumed>) = 0 [pid 503] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 503] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 508] <... futex resumed>) = 1 [pid 508] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 508] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 503] <... futex resumed>) = 0 [pid 503] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 503] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 508] <... futex resumed>) = 1 [pid 508] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 508] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 503] <... futex resumed>) = 0 [pid 503] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 503] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 508] <... futex resumed>) = 1 [pid 508] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 508] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 503] <... futex resumed>) = 0 [pid 503] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 503] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 508] <... futex resumed>) = 1 [ 19.614117][ T499] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.644123][ T499] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 508] sendfile(5, 6, NULL, 140737974943952) = 1048576 [pid 508] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 503] <... futex resumed>) = 0 [ 19.659165][ T489] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.673586][ T495] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.678320][ T489] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.688058][ T495] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.697007][ T512] EXT4-fs warning (device loop5): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [pid 508] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 499] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 499] ioctl(5, LOOP_CLR_FD [pid 489] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 495] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 489] ioctl(7, LOOP_CLR_FD [pid 495] ioctl(6, LOOP_CLR_FD [pid 489] <... ioctl resumed>) = 0 [pid 495] <... ioctl resumed>) = 0 [pid 489] close(7 [pid 495] close(6 [pid 489] <... close resumed>) = 0 [pid 495] <... close resumed>) = 0 [pid 489] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 495] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 489] <... futex resumed>) = 0 [pid 495] <... futex resumed>) = 0 [pid 489] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 495] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 497] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 497] ioctl(6, LOOP_CLR_FD) = 0 [pid 497] close(6) = 0 [pid 497] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 497] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 490] exit_group(0 [pid 496] <... futex resumed>) = ? [pid 495] <... futex resumed>) = ? [pid 490] <... exit_group resumed>) = ? [pid 496] +++ exited with 0 +++ [pid 495] +++ exited with 0 +++ [pid 490] +++ exited with 0 +++ [pid 492] exit_group(0 [pid 498] <... futex resumed>) = ? [pid 497] <... futex resumed>) = ? [pid 492] <... exit_group resumed>) = ? [pid 498] +++ exited with 0 +++ [pid 497] +++ exited with 0 +++ [pid 492] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=492, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 408] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 516 [pid 488] exit_group(0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=490, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 491] <... futex resumed>) = ? [pid 489] <... futex resumed>) = ? [pid 488] <... exit_group resumed>) = ? [pid 489] +++ exited with 0 +++ [pid 507] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 507] ioctl(4, LOOP_CLR_FD) = 0 [pid 507] close(4) = 0 [pid 491] +++ exited with 0 +++ [pid 507] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 507] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 516 attached [pid 503] exit_group(0 [pid 508] <... futex resumed>) = ? [pid 503] <... exit_group resumed>) = ? [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 508] +++ exited with 0 +++ [pid 407] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD [pid 507] <... futex resumed>) = ? [pid 407] <... ioctl resumed>) = 0 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 519 [pid 516] set_robust_list(0x5555564066e0, 24) = 0 [pid 516] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 516] setpgid(0, 0) = 0 [pid 516] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 516] write(3, "1000", 4) = 4 [pid 516] close(3) = 0 [pid 516] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 516] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 516] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 516] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[520], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 520 [pid 516] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 516] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 516] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 516] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 516] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[521], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 521 [ 19.708467][ T497] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.730403][ T507] EXT4-fs (loop5): get root inode failed [ 19.730498][ T497] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.735843][ T507] EXT4-fs (loop5): mount failed [pid 516] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 516] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 520 attached [pid 520] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 520] memfd_create("syzkaller", 0) = 3 [pid 520] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 519 attached [pid 519] set_robust_list(0x5555564066e0, 24) = 0 [pid 519] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 519] setpgid(0, 0) = 0 [pid 519] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 519] write(3, "1000", 4) = 4 [pid 519] close(3) = 0 [pid 519] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 519] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 519] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 519] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[522], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 522 [pid 519] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 519] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 519] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 519] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 519] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[523], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 523 [pid 519] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 519] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 520] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 520] munmap(0x7f6f98bca000, 1048576) = 0 [pid 520] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 520] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 520] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 521 attached [pid 521] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 521] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 520] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 520] close(4) = 0 [pid 520] close(3./strace-static-x86_64: Process 523 attached ./strace-static-x86_64: Process 522 attached [pid 523] set_robust_list(0x7f6fa0fea9e0, 24 [pid 522] set_robust_list(0x7f6fa100b9e0, 24 [pid 520] <... close resumed>) = 0 [pid 520] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 520] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 523] <... set_robust_list resumed>) = 0 [pid 523] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 522] <... set_robust_list resumed>) = 0 [pid 522] memfd_create("syzkaller", 0) = 4 [pid 522] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 507] +++ exited with 0 +++ [pid 503] +++ exited with 0 +++ [pid 523] <... open resumed>) = 3 [pid 523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 519] <... futex resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=503, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 519] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 519] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 523] <... futex resumed>) = 1 [pid 523] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 488] +++ exited with 0 +++ [pid 523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 519] <... futex resumed>) = 0 [pid 519] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 519] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 523] <... futex resumed>) = 1 [pid 523] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 519] <... futex resumed>) = 0 [pid 523] openat(-1, "/proc/self/exe", O_RDONLY [pid 519] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 523] <... openat resumed>) = 6 [pid 519] <... futex resumed>) = 0 [pid 523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 519] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 523] <... futex resumed>) = 0 [pid 519] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 523] sendfile(5, 6, NULL, 140737974943952 [pid 519] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 519] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 521] <... open resumed>) = 5 [pid 499] <... ioctl resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=488, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 499] close(5) = 0 [pid 412] <... openat resumed>) = 3 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 412] ioctl(3, LOOP_CLR_FD [pid 499] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] <... openat resumed>) = 3 [pid 499] <... futex resumed>) = 0 [pid 494] exit_group(0 [pid 412] close(3 [pid 410] ioctl(3, LOOP_CLR_FD [pid 500] <... futex resumed>) = ? [pid 494] <... exit_group resumed>) = ? [pid 412] <... close resumed>) = 0 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 500] +++ exited with 0 +++ [pid 499] +++ exited with 0 +++ [pid 494] +++ exited with 0 +++ [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] close(3) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 524 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=494, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 521] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR./strace-static-x86_64: Process 525 attached ./strace-static-x86_64: Process 524 attached [pid 521] <... futex resumed>) = 1 [pid 516] <... futex resumed>) = 0 [pid 501] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 525 [pid 525] set_robust_list(0x5555564066e0, 24 [pid 524] set_robust_list(0x5555564066e0, 24 [pid 521] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 516] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 501] ioctl(5, LOOP_CLR_FD [pid 409] <... openat resumed>) = 3 [pid 525] <... set_robust_list resumed>) = 0 [pid 524] <... set_robust_list resumed>) = 0 [pid 522] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 520] <... futex resumed>) = 0 [pid 516] <... futex resumed>) = 1 [pid 501] <... ioctl resumed>) = 0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 525] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 524] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 522] <... write resumed>) = 1048576 [pid 520] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 516] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 501] close(5 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 525] <... prctl resumed>) = 0 [pid 524] <... prctl resumed>) = 0 [pid 520] <... mount resumed>) = 0 [pid 501] <... close resumed>) = 0 [pid 409] close(3 [pid 525] setpgid(0, 0 [pid 524] setpgid(0, 0 [pid 523] <... sendfile resumed>) = 1048576 [pid 520] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 501] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... close resumed>) = 0 [pid 525] <... setpgid resumed>) = 0 [pid 524] <... setpgid resumed>) = 0 [pid 523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 520] <... futex resumed>) = 1 [pid 516] <... futex resumed>) = 0 [pid 501] <... futex resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 525] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 524] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 523] <... futex resumed>) = 1 [pid 520] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 519] <... futex resumed>) = 0 [pid 516] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 501] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 525] <... openat resumed>) = 3 [pid 524] <... openat resumed>) = 3 [pid 523] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 520] <... open resumed>) = 3 [pid 516] <... futex resumed>) = 0 [pid 493] exit_group(0 [pid 525] write(3, "1000", 4 [pid 524] write(3, "1000", 4 [pid 520] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 516] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 502] <... futex resumed>) = ? [pid 501] <... futex resumed>) = ? [pid 493] <... exit_group resumed>) = ? [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 526 ./strace-static-x86_64: Process 526 attached [pid 525] <... write resumed>) = 4 [pid 524] <... write resumed>) = 4 [pid 520] <... futex resumed>) = 0 [pid 516] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 502] +++ exited with 0 +++ [pid 501] +++ exited with 0 +++ [pid 526] set_robust_list(0x5555564066e0, 24 [pid 525] close(3 [pid 524] close(3 [pid 520] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 516] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 526] <... set_robust_list resumed>) = 0 [pid 525] <... close resumed>) = 0 [pid 524] <... close resumed>) = 0 [pid 520] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 516] <... futex resumed>) = 0 [pid 522] munmap(0x7f6f98bca000, 1048576 [pid 520] openat(-1, "/proc/self/exe", O_RDONLY [pid 516] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 525] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 524] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 520] <... openat resumed>) = 4 [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 522] <... munmap resumed>) = 0 [pid 520] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 525] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 524] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 522] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 520] <... futex resumed>) = 1 [pid 516] <... futex resumed>) = 0 [pid 522] <... openat resumed>) = 7 [pid 520] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 516] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 525] <... mmap resumed>) = 0x7f6fa0feb000 [pid 524] <... mmap resumed>) = 0x7f6fa0feb000 [pid 525] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 524] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 522] ioctl(7, LOOP_SET_FD, 4 [pid 520] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 516] <... futex resumed>) = 0 [pid 525] <... mprotect resumed>) = 0 [pid 524] <... mprotect resumed>) = 0 [pid 522] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 520] sendfile(3, 4, NULL, 140737974943952 [pid 516] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 526] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 525] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 524] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 522] ioctl(7, LOOP_CLR_FD) = 0 [pid 526] <... prctl resumed>) = 0 [pid 525] <... clone resumed>, parent_tid=[527], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 527 [pid 520] <... sendfile resumed>) = 1048576 ./strace-static-x86_64: Process 528 attached ./strace-static-x86_64: Process 527 attached [pid 526] setpgid(0, 0 [pid 525] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 524] <... clone resumed>, parent_tid=[528], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 528 [pid 520] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 528] set_robust_list(0x7f6fa100b9e0, 24 [pid 527] set_robust_list(0x7f6fa100b9e0, 24 [pid 526] <... setpgid resumed>) = 0 [pid 525] <... futex resumed>) = 0 [pid 524] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 520] <... futex resumed>) = 1 [pid 516] <... futex resumed>) = 0 [pid 528] <... set_robust_list resumed>) = 0 [pid 527] <... set_robust_list resumed>) = 0 [pid 526] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 525] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 524] <... futex resumed>) = 0 [pid 520] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 528] memfd_create("syzkaller", 0 [pid 527] memfd_create("syzkaller", 0 [pid 526] <... openat resumed>) = 3 [pid 525] <... futex resumed>) = 0 [pid 524] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 516] exit_group(0 [pid 528] <... memfd_create resumed>) = 3 [pid 527] <... memfd_create resumed>) = 3 [pid 526] write(3, "1000", 4 [pid 525] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 524] <... futex resumed>) = 0 [pid 528] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 527] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 526] <... write resumed>) = 4 [pid 525] <... mmap resumed>) = 0x7f6fa0fca000 [pid 524] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 522] ioctl(7, LOOP_SET_FD, 4 [pid 521] <... futex resumed>) = ? [pid 520] <... futex resumed>) = ? [pid 516] <... exit_group resumed>) = ? [pid 528] <... mmap resumed>) = 0x7f6f98beb000 [pid 527] <... mmap resumed>) = 0x7f6f98bca000 [pid 526] close(3 [pid 525] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 524] <... mmap resumed>) = 0x7f6f98bca000 [pid 521] +++ exited with 0 +++ [pid 528] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 526] <... close resumed>) = 0 [pid 525] <... mprotect resumed>) = 0 [pid 524] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 522] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 520] +++ exited with 0 +++ [pid 516] +++ exited with 0 +++ [pid 526] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 525] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 524] <... mprotect resumed>) = 0 [ 19.767105][ T501] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.781226][ T501] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 522] close(7 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=516, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 526] <... futex resumed>) = 0 [pid 524] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 522] <... close resumed>) = 0 [pid 526] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 525] <... clone resumed>, parent_tid=[529], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 529 [pid 522] close(4 [pid 526] <... mmap resumed>) = 0x7f6fa0feb000 [pid 525] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 524] <... clone resumed>, parent_tid=[530], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 530 [pid 522] <... close resumed>) = 0 [pid 526] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 525] <... futex resumed>) = 0 [pid 524] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 522] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 527] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 526] <... mprotect resumed>) = 0 [pid 525] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 524] <... futex resumed>) = 0 [pid 522] <... futex resumed>) = 0 [pid 526] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 524] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 522] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 526] <... clone resumed>, parent_tid=[531], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 531 [pid 519] exit_group(0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 526] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 523] <... futex resumed>) = ? [pid 522] <... futex resumed>) = ? [pid 519] <... exit_group resumed>) = ? [pid 408] <... ioctl resumed>) = 0 [pid 526] <... futex resumed>) = 0 [pid 523] +++ exited with 0 +++ [pid 522] +++ exited with 0 +++ [pid 408] close(3 [pid 526] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... close resumed>) = 0 [pid 526] <... futex resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 526] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 532 [pid 528] <... write resumed>) = 1048576 [pid 526] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 528] munmap(0x7f6f98beb000, 1048576 [pid 526] <... mprotect resumed>) = 0 ./strace-static-x86_64: Process 532 attached ./strace-static-x86_64: Process 531 attached ./strace-static-x86_64: Process 530 attached ./strace-static-x86_64: Process 529 attached [pid 527] <... write resumed>) = 1048576 [pid 526] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[533], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 533 [pid 531] set_robust_list(0x7f6fa100b9e0, 24 [pid 530] set_robust_list(0x7f6f98bea9e0, 24 [pid 529] set_robust_list(0x7f6fa0fea9e0, 24 [pid 528] <... munmap resumed>) = 0 [pid 527] munmap(0x7f6f98bca000, 1048576 [pid 526] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 533 attached [pid 532] set_robust_list(0x5555564066e0, 24 [pid 531] <... set_robust_list resumed>) = 0 [pid 530] <... set_robust_list resumed>) = 0 [pid 529] <... set_robust_list resumed>) = 0 [pid 528] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 527] <... munmap resumed>) = 0 [pid 526] <... futex resumed>) = 0 [pid 528] <... openat resumed>) = 4 [pid 526] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 533] set_robust_list(0x7f6fa0fea9e0, 24 [pid 532] <... set_robust_list resumed>) = 0 [pid 531] memfd_create("syzkaller", 0 [pid 530] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 529] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 528] ioctl(4, LOOP_SET_FD, 3 [pid 527] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 533] <... set_robust_list resumed>) = 0 [pid 532] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 531] <... memfd_create resumed>) = 3 [pid 530] <... open resumed>) = 5 [pid 529] <... open resumed>) = 4 [pid 527] <... openat resumed>) = 5 [pid 527] ioctl(5, LOOP_SET_FD, 3 [pid 533] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 532] <... prctl resumed>) = 0 [pid 531] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 530] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 529] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 528] <... ioctl resumed>) = 0 [pid 533] <... open resumed>) = 4 [pid 532] setpgid(0, 0 [pid 531] <... mmap resumed>) = 0x7f6f98bca000 [pid 530] <... futex resumed>) = 1 [pid 529] <... futex resumed>) = 1 [pid 528] close(3 [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 533] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 532] <... setpgid resumed>) = 0 [pid 531] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 530] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 529] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 528] <... close resumed>) = 0 [pid 525] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 524] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 533] <... futex resumed>) = 1 [pid 532] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 530] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 527] <... ioctl resumed>) = 0 [pid 526] <... futex resumed>) = 0 [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 493] +++ exited with 0 +++ [pid 532] <... openat resumed>) = 3 [pid 530] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 529] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 527] close(3 [pid 526] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 525] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 524] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=493, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 532] write(3, "1000", 4 [pid 530] <... mount resumed>) = 0 [pid 529] <... mount resumed>) = 0 [pid 527] <... close resumed>) = 0 [pid 526] <... futex resumed>) = 0 [pid 532] <... write resumed>) = 4 [pid 530] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 529] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 527] mkdir("./bus", 0777 [pid 526] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 533] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 532] close(3 [pid 530] <... futex resumed>) = 1 [pid 529] <... futex resumed>) = 1 [pid 527] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 533] <... mount resumed>) = 0 [pid 532] <... close resumed>) = 0 [pid 530] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 529] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 527] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 525] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 524] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... openat resumed>) = 3 [pid 533] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 532] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 530] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 533] <... futex resumed>) = 1 [pid 532] <... futex resumed>) = 0 [pid 531] <... write resumed>) = 1048576 [pid 530] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 529] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 528] mkdir("./bus", 0777 [pid 526] <... futex resumed>) = 0 [pid 525] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 524] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 533] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 532] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 531] munmap(0x7f6f98bca000, 1048576 [pid 530] <... open resumed>) = 3 [pid 529] <... open resumed>) = 3 [pid 528] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 526] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] close(3 [pid 533] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 532] <... mmap resumed>) = 0x7f6fa0feb000 [pid 531] <... munmap resumed>) = 0 [pid 530] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 529] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 528] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 526] <... futex resumed>) = 0 [pid 519] +++ exited with 0 +++ [pid 533] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 532] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 531] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 530] <... futex resumed>) = 1 [pid 529] <... futex resumed>) = 1 [pid 526] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=519, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 533] <... open resumed>) = 5 [pid 532] <... mprotect resumed>) = 0 [pid 531] <... openat resumed>) = 6 [pid 530] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 529] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 525] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 524] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 533] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 532] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [ 19.843393][ T528] loop5: detected capacity change from 0 to 2048 [ 19.844749][ T527] loop3: detected capacity change from 0 to 2048 [ 19.871058][ T527] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.871832][ T531] loop2: detected capacity change from 0 to 2048 [pid 531] ioctl(6, LOOP_SET_FD, 3 [pid 530] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 407] <... restart_syscall resumed>) = 0 [pid 533] <... futex resumed>) = 1 [pid 530] openat(-1, "/proc/self/exe", O_RDONLY [pid 529] openat(-1, "/proc/self/exe", O_RDONLY [pid 526] <... futex resumed>) = 0 [pid 525] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 524] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 533] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 532] <... clone resumed>, parent_tid=[536], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 536 [pid 530] <... openat resumed>) = 6 [pid 529] <... openat resumed>) = 6 [pid 526] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 533] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 532] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 530] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 529] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 526] <... futex resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 533] openat(-1, "/proc/self/exe", O_RDONLY [pid 532] <... futex resumed>) = 0 [pid 530] <... futex resumed>) = 1 [pid 529] <... futex resumed>) = 1 [pid 526] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 533] <... openat resumed>) = 7 [pid 532] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 530] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 529] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 525] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 524] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] ioctl(3, LOOP_CLR_FD [pid 533] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 532] <... futex resumed>) = 0 [pid 530] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 525] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 533] <... futex resumed>) = 1 [pid 532] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 530] sendfile(3, 6, NULL, 140737974943952 [pid 529] sendfile(3, 6, NULL, 140737974943952 [pid 526] <... futex resumed>) = 0 [pid 525] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 524] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] close(3./strace-static-x86_64: Process 536 attached [pid 533] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 532] <... mmap resumed>) = 0x7f6fa0fca000 [pid 531] <... ioctl resumed>) = 0 [pid 536] set_robust_list(0x7f6fa100b9e0, 24 [pid 531] close(3 [pid 536] <... set_robust_list resumed>) = 0 [pid 531] <... close resumed>) = 0 [pid 536] memfd_create("syzkaller", 0 [pid 531] mkdir("./bus", 0777 [pid 536] <... memfd_create resumed>) = 3 [pid 531] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 536] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 531] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 536] <... mmap resumed>) = 0x7f6f98bca000 [pid 536] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 533] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 532] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 530] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 529] <... sendfile resumed>) = 1048576 [pid 526] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... close resumed>) = 0 ./strace-static-x86_64: Process 537 attached [pid 536] munmap(0x7f6f98bca000, 1048576 [pid 533] sendfile(5, 7, NULL, 140737974943952 [pid 532] <... mprotect resumed>) = 0 [pid 531] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 530] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 537] set_robust_list(0x5555564066e0, 24 [pid 536] <... munmap resumed>) = 0 [pid 533] <... sendfile resumed>) = 1048576 [pid 532] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 531] ioctl(6, LOOP_CLR_FD [pid 530] <... futex resumed>) = 1 [pid 529] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 526] <... futex resumed>) = 0 [pid 524] <... futex resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 537 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 533] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 533] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 537] <... set_robust_list resumed>) = 0 [pid 536] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 531] <... ioctl resumed>) = 0 [pid 530] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 529] <... futex resumed>) = 1 [pid 526] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 525] <... futex resumed>) = 0 [pid 537] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 536] <... openat resumed>) = 4 [pid 532] <... clone resumed>, parent_tid=[539], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 539 [pid 531] close(6 [pid 529] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 526] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 538 [pid 537] <... prctl resumed>) = 0 [pid 536] ioctl(4, LOOP_SET_FD, 3 [pid 532] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 531] <... close resumed>) = 0 [pid 537] setpgid(0, 0 [pid 536] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 532] <... futex resumed>) = 0 [pid 531] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 537] <... setpgid resumed>) = 0 [pid 536] ioctl(4, LOOP_CLR_FD [pid 532] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 531] <... futex resumed>) = 0 [pid 537] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 536] <... ioctl resumed>) = 0 [pid 531] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 527] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 537] <... openat resumed>) = 3 [pid 527] ioctl(5, LOOP_CLR_FD [pid 526] exit_group(0 [pid 537] write(3, "1000", 4 [pid 531] <... futex resumed>) = ? [pid 527] <... ioctl resumed>) = 0 [pid 526] <... exit_group resumed>) = ? [pid 537] <... write resumed>) = 4 [pid 531] +++ exited with 0 +++ [pid 537] close(3 [pid 536] ioctl(4, LOOP_SET_FD, 3 [pid 537] <... close resumed>) = 0 [pid 536] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 537] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 536] close(4 [pid 537] <... futex resumed>) = 0 [pid 536] <... close resumed>) = 0 [pid 537] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 536] close(3./strace-static-x86_64: Process 539 attached ./strace-static-x86_64: Process 538 attached [pid 537] <... mmap resumed>) = 0x7f6fa0feb000 [pid 536] <... close resumed>) = 0 [pid 533] <... futex resumed>) = ? [pid 527] close(5 [pid 539] set_robust_list(0x7f6fa0fea9e0, 24 [pid 538] set_robust_list(0x5555564066e0, 24 [pid 537] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 536] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 527] <... close resumed>) = 0 [pid 539] <... set_robust_list resumed>) = 0 [pid 538] <... set_robust_list resumed>) = 0 [ 19.888073][ T527] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 19.893382][ T120] blk_update_request: I/O error, dev loop2, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 19.911288][ T120] blk_update_request: I/O error, dev loop2, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 19.925668][ T531] EXT4-fs (loop2): VFS: Can't find ext4 filesystem [pid 537] <... mprotect resumed>) = 0 [pid 536] <... futex resumed>) = 0 [pid 539] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 538] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 537] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 536] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 539] <... open resumed>) = 3 [pid 538] <... prctl resumed>) = 0 [pid 539] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 538] setpgid(0, 0 [pid 537] <... clone resumed>, parent_tid=[542], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 542 [pid 539] <... futex resumed>) = 1 [pid 538] <... setpgid resumed>) = 0 [pid 537] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 532] <... futex resumed>) = 0 [pid 539] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 538] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 537] <... futex resumed>) = 0 [pid 532] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 538] <... openat resumed>) = 3 [pid 537] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 536] <... futex resumed>) = 0 [pid 532] <... futex resumed>) = 1 [pid 538] write(3, "1000", 4 [pid 537] <... futex resumed>) = 0 [pid 536] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 532] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 538] <... write resumed>) = 4 [pid 537] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 536] <... mount resumed>) = 0 [pid 538] close(3 [pid 537] <... mmap resumed>) = 0x7f6fa0fca000 [pid 536] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 538] <... close resumed>) = 0 [pid 537] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 536] <... futex resumed>) = 1 [pid 532] <... futex resumed>) = 0 [pid 538] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 537] <... mprotect resumed>) = 0 [pid 536] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 532] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 538] <... futex resumed>) = 0 [pid 537] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 536] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 532] <... futex resumed>) = 0 [pid 538] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 536] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 532] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 538] <... mmap resumed>) = 0x7f6fa0feb000 [pid 537] <... clone resumed>, parent_tid=[543], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 543 [pid 536] <... open resumed>) = 4 [pid 538] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 537] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 536] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 538] <... mprotect resumed>) = 0 [pid 537] <... futex resumed>) = 0 [pid 536] <... futex resumed>) = 1 [pid 532] <... futex resumed>) = 0 [pid 538] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 537] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 536] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 532] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 536] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 532] <... futex resumed>) = 0 [pid 538] <... clone resumed>, parent_tid=[544], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 544 [pid 536] openat(-1, "/proc/self/exe", O_RDONLY [pid 532] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 538] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 536] <... openat resumed>) = 5 [pid 538] <... futex resumed>) = 0 [pid 536] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 527] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 538] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 536] <... futex resumed>) = 1 [pid 533] +++ exited with 0 +++ [pid 532] <... futex resumed>) = 0 [pid 527] <... futex resumed>) = 0 [pid 526] +++ exited with 0 +++ [pid 527] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 542 attached [pid 538] <... futex resumed>) = 0 [pid 536] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 532] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 525] exit_group(0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=526, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- ./strace-static-x86_64: Process 543 attached ./strace-static-x86_64: Process 544 attached [pid 538] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 536] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 532] <... futex resumed>) = 0 [pid 529] <... futex resumed>) = ? [pid 527] <... futex resumed>) = ? [pid 525] <... exit_group resumed>) = ? [pid 542] set_robust_list(0x7f6fa100b9e0, 24 [pid 527] +++ exited with 0 +++ [pid 542] <... set_robust_list resumed>) = 0 [pid 538] <... mmap resumed>) = 0x7f6fa0fca000 [pid 536] sendfile(4, 5, NULL, 140737974943952 [pid 532] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 529] +++ exited with 0 +++ [pid 543] set_robust_list(0x7f6fa0fea9e0, 24 [pid 525] +++ exited with 0 +++ [pid 544] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 543] <... set_robust_list resumed>) = 0 [pid 542] memfd_create("syzkaller", 0 [pid 538] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 543] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 544] memfd_create("syzkaller", 0 [pid 542] <... memfd_create resumed>) = 3 [pid 538] <... mprotect resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=525, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 409] <... openat resumed>) = 3 [pid 544] <... memfd_create resumed>) = 3 [pid 543] <... open resumed>) = 4 [pid 542] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 538] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 409] ioctl(3, LOOP_CLR_FD [pid 544] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 543] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 542] <... mmap resumed>) = 0x7f6f98bca000 [pid 528] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 410] <... restart_syscall resumed>) = 0 [pid 409] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 545 attached [pid 544] <... mmap resumed>) = 0x7f6f98bca000 [pid 543] <... futex resumed>) = 1 [pid 542] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 538] <... clone resumed>, parent_tid=[545], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 545 [pid 537] <... futex resumed>) = 0 [pid 536] <... sendfile resumed>) = 1048576 [pid 528] ioctl(4, LOOP_CLR_FD [pid 409] close(3 [pid 545] set_robust_list(0x7f6fa0fea9e0, 24 [pid 544] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 543] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 542] <... write resumed>) = 1048576 [pid 538] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 537] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... close resumed>) = 0 [pid 545] <... set_robust_list resumed>) = 0 [pid 544] <... write resumed>) = 1048576 [pid 543] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 542] munmap(0x7f6f98bca000, 1048576 [pid 538] <... futex resumed>) = 0 [pid 537] <... futex resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 545] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 544] munmap(0x7f6f98bca000, 1048576 [pid 543] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 542] <... munmap resumed>) = 0 [pid 538] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 537] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] <... openat resumed>) = 3 [pid 545] <... open resumed>) = 4 [pid 544] <... munmap resumed>) = 0 [pid 543] <... mount resumed>) = 0 [pid 542] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 410] ioctl(3, LOOP_CLR_FD [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 546 [pid 545] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 544] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 543] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 542] <... openat resumed>) = 5 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 545] <... futex resumed>) = 1 [pid 544] <... openat resumed>) = 5 [pid 543] <... futex resumed>) = 1 [ 19.966690][ T528] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 19.990243][ T528] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 542] ioctl(5, LOOP_SET_FD, 3 [pid 538] <... futex resumed>) = 0 [pid 537] <... futex resumed>) = 0 [pid 536] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 528] <... ioctl resumed>) = 0 [pid 410] close(3 [pid 545] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 544] ioctl(5, LOOP_SET_FD, 3 [pid 543] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 538] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 537] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 536] <... futex resumed>) = 1 [pid 532] <... futex resumed>) = 0 [pid 528] close(4 [pid 410] <... close resumed>) = 0 [pid 545] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 543] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 538] <... futex resumed>) = 0 [pid 537] <... futex resumed>) = 0 [pid 536] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 532] exit_group(0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 545] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 543] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 542] <... ioctl resumed>) = 0 [pid 539] <... futex resumed>) = ? [pid 538] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 537] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 536] <... futex resumed>) = ? [pid 532] <... exit_group resumed>) = ? [pid 545] <... mount resumed>) = 0 [pid 539] +++ exited with 0 +++ [pid 536] +++ exited with 0 +++ [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 547 [pid 545] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 532] +++ exited with 0 +++ [pid 545] <... futex resumed>) = 1 [pid 542] close(3 [pid 538] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=532, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 545] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 538] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 545] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 538] <... futex resumed>) = 0 [pid 408] <... restart_syscall resumed>) = 0 [pid 545] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 542] <... close resumed>) = 0 [pid 538] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 542] mkdir("./bus", 0777 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 542] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 408] <... openat resumed>) = 3 ./strace-static-x86_64: Process 547 attached [pid 542] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3 [pid 547] set_robust_list(0x5555564066e0, 24 [pid 408] <... close resumed>) = 0 [pid 547] <... set_robust_list resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 548 [pid 547] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 544] <... ioctl resumed>) = 0 [pid 545] <... open resumed>) = 6 [pid 543] <... open resumed>) = 6 [pid 545] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 543] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 545] <... futex resumed>) = 1 [pid 543] <... futex resumed>) = 1 [pid 538] <... futex resumed>) = 0 [pid 537] <... futex resumed>) = 0 [pid 545] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 544] close(3 [pid 543] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 538] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 537] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 545] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 544] <... close resumed>) = 0 [pid 543] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 538] <... futex resumed>) = 0 [pid 537] <... futex resumed>) = 0 [pid 545] openat(-1, "/proc/self/exe", O_RDONLY [pid 544] mkdir("./bus", 0777 [pid 543] openat(-1, "/proc/self/exe", O_RDONLY [pid 538] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 537] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 545] <... openat resumed>) = 3 [pid 544] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 543] <... openat resumed>) = 3 [pid 545] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 544] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 543] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 546 attached [pid 547] <... prctl resumed>) = 0 [pid 545] <... futex resumed>) = 1 [pid 543] <... futex resumed>) = 1 [pid 538] <... futex resumed>) = 0 [pid 537] <... futex resumed>) = 0 [pid 547] setpgid(0, 0 [pid 546] set_robust_list(0x5555564066e0, 24 [pid 545] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 543] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 538] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 537] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 548 attached [pid 547] <... setpgid resumed>) = 0 [pid 546] <... set_robust_list resumed>) = 0 [pid 545] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 543] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 538] <... futex resumed>) = 0 [pid 537] <... futex resumed>) = 0 [ 20.037853][ T542] loop4: detected capacity change from 0 to 2048 [ 20.048032][ T544] loop0: detected capacity change from 0 to 2048 [ 20.071002][ T542] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 548] set_robust_list(0x5555564066e0, 24 [pid 547] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 546] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 545] sendfile(6, 3, NULL, 140737974943952 [pid 543] sendfile(6, 3, NULL, 140737974943952 [pid 538] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 537] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 547] <... openat resumed>) = 3 [pid 546] <... prctl resumed>) = 0 [pid 545] <... sendfile resumed>) = 1048576 [pid 548] <... set_robust_list resumed>) = 0 [pid 547] write(3, "1000", 4 [pid 545] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 548] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 545] <... futex resumed>) = 1 [pid 538] <... futex resumed>) = 0 [pid 548] <... prctl resumed>) = 0 [pid 545] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 548] setpgid(0, 0) = 0 [pid 528] <... close resumed>) = 0 [pid 548] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 548] write(3, "1000", 4) = 4 [pid 548] close(3) = 0 [pid 548] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 548] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 548] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 547] <... write resumed>) = 4 [pid 546] setpgid(0, 0 [pid 548] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[551], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 551 [pid 548] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 548] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 548] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 548] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 548] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 547] close(3 [pid 546] <... setpgid resumed>) = 0 [pid 548] <... clone resumed>, parent_tid=[552], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 552 [pid 548] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 548] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 552 attached [pid 552] set_robust_list(0x7f6fa0fea9e0, 24 [pid 547] <... close resumed>) = 0 [pid 546] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 547] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 546] <... openat resumed>) = 3 [pid 547] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 546] write(3, "1000", 4 [pid 547] <... mmap resumed>) = 0x7f6fa0feb000 [pid 546] <... write resumed>) = 4 [pid 547] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 546] close(3 [pid 547] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 546] <... close resumed>) = 0 [pid 546] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 547] <... clone resumed>, parent_tid=[553], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 553 [pid 546] <... futex resumed>) = 0 [pid 547] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 547] <... futex resumed>) = 0 [pid 552] <... set_robust_list resumed>) = 0 [pid 546] <... mmap resumed>) = 0x7f6fa0feb000 [pid 547] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 552] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 546] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 552] <... open resumed>) = 3 [pid 552] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 547] <... futex resumed>) = 0 [pid 546] <... mprotect resumed>) = 0 ./strace-static-x86_64: Process 551 attached [pid 552] <... futex resumed>) = 1 [pid 548] <... futex resumed>) = 0 [pid 547] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 546] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 552] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 551] set_robust_list(0x7f6fa100b9e0, 24 [pid 548] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 547] <... mmap resumed>) = 0x7f6fa0fca000 [pid 552] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 551] <... set_robust_list resumed>) = 0 [pid 548] <... futex resumed>) = 0 [pid 552] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 551] memfd_create("syzkaller", 0 [pid 548] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 552] <... mount resumed>) = 0 [pid 551] <... memfd_create resumed>) = 4 [pid 552] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 551] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 547] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 552] <... futex resumed>) = 1 [pid 551] <... mmap resumed>) = 0x7f6f98bca000 [pid 548] <... futex resumed>) = 0 [pid 547] <... mprotect resumed>) = 0 [pid 546] <... clone resumed>, parent_tid=[554], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 554 [pid 552] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 551] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 548] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 543] <... sendfile resumed>) = 1048576 [pid 528] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 552] <... open resumed>) = 5 [pid 548] <... futex resumed>) = 0 [pid 552] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 548] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 547] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 546] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 528] <... futex resumed>) = 0 [pid 543] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 552] <... futex resumed>) = 0 [pid 548] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 546] <... futex resumed>) = 0 [pid 524] exit_group(0./strace-static-x86_64: Process 554 attached [pid 552] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 548] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 547] <... clone resumed>, parent_tid=[555], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 555 [pid 546] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 543] <... futex resumed>) = 1 [pid 542] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 537] <... futex resumed>) = 0 [pid 530] <... futex resumed>) = ? [pid 524] <... exit_group resumed>) = ? [pid 554] set_robust_list(0x7f6fa100b9e0, 24 [pid 552] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 548] <... futex resumed>) = 0 [pid 547] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] <... futex resumed>) = 0 [pid 542] ioctl(5, LOOP_CLR_FD [pid 530] +++ exited with 0 +++ [pid 554] <... set_robust_list resumed>) = 0 [pid 552] openat(-1, "/proc/self/exe", O_RDONLY [pid 551] <... write resumed>) = 1048576 [pid 548] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 547] <... futex resumed>) = 0 [pid 546] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 543] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 554] memfd_create("syzkaller", 0 [pid 552] <... openat resumed>) = 6 [pid 547] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 546] <... mmap resumed>) = 0x7f6fa0fca000 ./strace-static-x86_64: Process 555 attached [pid 554] <... memfd_create resumed>) = 3 [pid 552] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 555] set_robust_list(0x7f6fa0fea9e0, 24 [pid 554] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 552] <... futex resumed>) = 1 [pid 548] <... futex resumed>) = 0 [pid 546] <... mprotect resumed>) = 0 [pid 555] <... set_robust_list resumed>) = 0 [pid 554] <... mmap resumed>) = 0x7f6f98bca000 [pid 552] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 548] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 555] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 554] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 552] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 548] <... futex resumed>) = 0 [pid 555] <... open resumed>) = 3 [pid 552] sendfile(5, 6, NULL, 140737974943952 [ 20.076321][ T544] EXT4-fs warning (device loop0): read_mmp_block:107: Error -117 while reading MMP block 64 [ 20.085456][ T542] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 548] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 546] <... clone resumed>, parent_tid=[556], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 556 [pid 544] <... mount resumed>) = -1 EINVAL (Invalid argument) ./strace-static-x86_64: Process 556 attached ./strace-static-x86_64: Process 553 attached [pid 555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 551] munmap(0x7f6f98bca000, 1048576 [pid 546] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 544] ioctl(5, LOOP_CLR_FD [pid 556] set_robust_list(0x7f6fa0fea9e0, 24 [pid 555] <... futex resumed>) = 1 [pid 553] set_robust_list(0x7f6fa100b9e0, 24 [pid 551] <... munmap resumed>) = 0 [pid 547] <... futex resumed>) = 0 [pid 546] <... futex resumed>) = 0 [pid 544] <... ioctl resumed>) = 0 [pid 556] <... set_robust_list resumed>) = 0 [pid 555] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 553] <... set_robust_list resumed>) = 0 [pid 551] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 547] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 544] close(5 [pid 556] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 555] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 553] memfd_create("syzkaller", 0 [pid 552] <... sendfile resumed>) = 1048576 [pid 551] <... openat resumed>) = 7 [pid 547] <... futex resumed>) = 0 [pid 544] <... close resumed>) = 0 [pid 556] <... open resumed>) = 4 [pid 555] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 553] <... memfd_create resumed>) = 4 [pid 552] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 551] ioctl(7, LOOP_SET_FD, 4 [pid 547] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 544] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 555] <... mount resumed>) = 0 [pid 553] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 552] <... futex resumed>) = 1 [pid 551] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 548] <... futex resumed>) = 0 [pid 544] <... futex resumed>) = 0 [pid 556] <... futex resumed>) = 1 [pid 555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 554] <... write resumed>) = 1048576 [pid 553] <... mmap resumed>) = 0x7f6f98bca000 [pid 552] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 551] ioctl(7, LOOP_CLR_FD [pid 546] <... futex resumed>) = 0 [pid 544] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 556] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 555] <... futex resumed>) = 1 [pid 547] <... futex resumed>) = 0 [pid 555] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 547] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 538] exit_group(0 [pid 555] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 547] <... futex resumed>) = 0 [pid 545] <... futex resumed>) = ? [pid 538] <... exit_group resumed>) = ? [pid 555] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 547] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 545] +++ exited with 0 +++ [pid 555] <... open resumed>) = 5 [pid 555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 547] <... futex resumed>) = 0 [pid 556] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 555] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 554] munmap(0x7f6f98bca000, 1048576 [pid 553] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 551] <... ioctl resumed>) = 0 [pid 547] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 544] <... futex resumed>) = ? [pid 555] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 547] <... futex resumed>) = 0 [pid 555] openat(-1, "/proc/self/exe", O_RDONLY [pid 547] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 555] <... openat resumed>) = 6 [pid 555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 556] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 555] <... futex resumed>) = 1 [pid 547] <... futex resumed>) = 0 [pid 546] <... futex resumed>) = 0 [pid 544] +++ exited with 0 +++ [pid 538] +++ exited with 0 +++ [pid 556] <... mount resumed>) = 0 [pid 555] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 547] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=538, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 555] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 547] <... futex resumed>) = 0 [pid 546] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 556] <... futex resumed>) = 0 [pid 555] sendfile(5, 6, NULL, 140737974943952 [pid 547] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 546] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... restart_syscall resumed>) = 0 [pid 556] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 555] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 546] <... futex resumed>) = 0 [pid 555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 555] <... futex resumed>) = 1 [pid 551] ioctl(7, LOOP_SET_FD, 4 [pid 547] <... futex resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 555] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 551] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 407] <... openat resumed>) = 3 [pid 551] close(7 [pid 407] ioctl(3, LOOP_CLR_FD [pid 551] <... close resumed>) = 0 [pid 407] <... ioctl resumed>) = 0 [pid 551] close(4 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 557 ./strace-static-x86_64: Process 557 attached [pid 557] set_robust_list(0x5555564066e0, 24) = 0 [pid 557] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 557] setpgid(0, 0) = 0 [pid 557] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 551] <... close resumed>) = 0 [pid 557] <... openat resumed>) = 3 [pid 557] write(3, "1000", 4) = 4 [pid 551] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 551] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 557] close(3) = 0 [pid 557] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 553] <... write resumed>) = 1048576 [pid 548] exit_group(0 [pid 552] <... futex resumed>) = ? [pid 551] <... futex resumed>) = ? [pid 548] <... exit_group resumed>) = ? [pid 554] <... munmap resumed>) = 0 [pid 553] munmap(0x7f6f98bca000, 1048576 [pid 552] +++ exited with 0 +++ [pid 551] +++ exited with 0 +++ [pid 548] +++ exited with 0 +++ [pid 554] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 553] <... munmap resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=548, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 557] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 557] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 553] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 557] <... mprotect resumed>) = 0 [pid 553] <... openat resumed>) = 7 ./strace-static-x86_64: Process 558 attached [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 558 [pid 557] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 553] ioctl(7, LOOP_SET_FD, 4 [pid 558] set_robust_list(0x5555564066e0, 24) = 0 [pid 558] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 558] setpgid(0, 0) = 0 [pid 558] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 558] write(3, "1000", 4) = 4 [pid 558] close(3) = 0 [pid 558] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 558] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 558] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 558] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[559], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 559 [pid 558] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 558] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 558] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 558] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 558] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[560], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 560 [pid 558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 560 attached [pid 560] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 560] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 559 attached [pid 559] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 559] memfd_create("syzkaller", 0) = 4 [pid 559] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 557] <... clone resumed>, parent_tid=[561], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 561 [pid 557] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 557] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 553] <... ioctl resumed>) = 0 [pid 557] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 557] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 553] close(4 [pid 528] +++ exited with 0 +++ [pid 524] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=524, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 559] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 412] <... restart_syscall resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 563 ./strace-static-x86_64: Process 561 attached [pid 561] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 561] memfd_create("syzkaller", 0) = 3 [pid 561] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 556] <... open resumed>) = 5 [pid 560] <... open resumed>) = 3 [pid 556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 554] <... openat resumed>) = 6 [pid 557] <... mprotect resumed>) = 0 [pid 556] <... futex resumed>) = 1 [pid 554] ioctl(6, LOOP_SET_FD, 3 [pid 546] <... futex resumed>) = 0 [pid 560] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 558] <... futex resumed>) = 0 [pid 560] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 560] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 558] <... futex resumed>) = 0 [pid 560] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 560] <... mount resumed>) = 0 [pid 560] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 558] <... futex resumed>) = 0 [pid 560] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 560] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 558] <... futex resumed>) = 0 [pid 560] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 560] <... open resumed>) = 5 [pid 546] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 560] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] <... futex resumed>) = 0 [pid 556] openat(-1, "/proc/self/exe", O_RDONLY [pid 560] <... futex resumed>) = 1 [pid 558] <... futex resumed>) = 0 [pid 557] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 546] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 560] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 560] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 558] <... futex resumed>) = 0 [pid 556] <... openat resumed>) = 7 [pid 560] openat(-1, "/proc/self/exe", O_RDONLY [pid 558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 560] <... openat resumed>) = 6 [pid 560] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 558] <... futex resumed>) = 0 [pid 557] <... clone resumed>, parent_tid=[564], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 564 [pid 556] <... futex resumed>) = 1 [pid 546] <... futex resumed>) = 0 [pid 560] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 557] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 556] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 560] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 558] <... futex resumed>) = 0 [pid 557] <... futex resumed>) = 0 [pid 556] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 546] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 560] sendfile(5, 6, NULL, 140737974943952 [pid 558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 557] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 556] sendfile(5, 7, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 546] <... futex resumed>) = 0 [pid 556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 546] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 556] <... futex resumed>) = 0 [pid 546] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 556] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 553] <... close resumed>) = 0 [pid 553] mkdir("./bus", 0777 [pid 560] <... sendfile resumed>) = 1048576 [pid 560] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 558] <... futex resumed>) = 0 [pid 560] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 542] <... ioctl resumed>) = 0 [pid 559] <... write resumed>) = 1048576 [pid 542] close(5) = 0 ./strace-static-x86_64: Process 563 attached [pid 542] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 563] set_robust_list(0x5555564066e0, 24 [pid 542] <... futex resumed>) = 0 [pid 563] <... set_robust_list resumed>) = 0 [pid 559] munmap(0x7f6f98bca000, 1048576 [pid 542] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 537] exit_group(0 [pid 563] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 559] <... munmap resumed>) = 0 [pid 543] <... futex resumed>) = ? [pid 542] <... futex resumed>) = ? [pid 537] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 564 attached [pid 563] <... prctl resumed>) = 0 [pid 559] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 554] <... ioctl resumed>) = 0 [pid 553] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 543] +++ exited with 0 +++ [pid 542] +++ exited with 0 +++ [pid 563] setpgid(0, 0 [pid 559] <... openat resumed>) = 7 [pid 564] set_robust_list(0x7f6fa0fea9e0, 24 [pid 563] <... setpgid resumed>) = 0 [pid 559] ioctl(7, LOOP_SET_FD, 4 [pid 554] close(3 [pid 553] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 563] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 561] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 559] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 564] <... set_robust_list resumed>) = 0 [pid 554] <... close resumed>) = 0 [pid 563] <... openat resumed>) = 3 [pid 559] ioctl(7, LOOP_CLR_FD [pid 564] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 563] write(3, "1000", 4 [pid 559] <... ioctl resumed>) = 0 [pid 554] mkdir("./bus", 0777 [pid 563] <... write resumed>) = 4 [pid 554] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 563] close(3) = 0 [pid 563] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 563] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 563] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 563] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[565], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 565 [pid 563] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 563] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 563] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 554] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 563] <... mmap resumed>) = 0x7f6fa0fca000 [pid 564] <... open resumed>) = 4 [pid 563] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 561] <... write resumed>) = 1048576 [pid 563] <... mprotect resumed>) = 0 [pid 559] ioctl(7, LOOP_SET_FD, 4 [pid 563] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 559] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 559] close(7 [pid 563] <... clone resumed>, parent_tid=[566], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 566 [pid 561] munmap(0x7f6f98bca000, 1048576 [pid 559] <... close resumed>) = 0 [pid 563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 559] close(4 [pid 564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 563] <... futex resumed>) = 0 [pid 561] <... munmap resumed>) = 0 [pid 559] <... close resumed>) = 0 [pid 564] <... futex resumed>) = 1 [pid 563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 561] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 559] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 557] <... futex resumed>) = 0 [ 20.168365][ T553] loop3: detected capacity change from 0 to 2048 [ 20.193379][ T554] loop2: detected capacity change from 0 to 2048 [pid 564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 559] <... futex resumed>) = 0 [pid 564] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 559] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 557] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 564] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 557] <... futex resumed>) = 0 ./strace-static-x86_64: Process 566 attached [pid 566] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 566] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 558] exit_group(0 [pid 560] <... futex resumed>) = ? [pid 559] <... futex resumed>) = ? [pid 558] <... exit_group resumed>) = ? [pid 560] +++ exited with 0 +++ [pid 559] +++ exited with 0 +++ [pid 558] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=558, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 571 [pid 566] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 563] <... futex resumed>) = 0 [pid 563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 566] <... futex resumed>) = 1 [pid 566] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 566] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 563] <... futex resumed>) = 0 [pid 566] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 566] <... open resumed>) = 4 [pid 563] <... futex resumed>) = 0 [pid 566] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 566] <... futex resumed>) = 0 [pid 563] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 565 attached [pid 566] openat(-1, "/proc/self/exe", O_RDONLY [pid 563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 566] <... openat resumed>) = 5 [pid 565] set_robust_list(0x7f6fa100b9e0, 24 [pid 563] <... futex resumed>) = 0 [pid 566] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 565] <... set_robust_list resumed>) = 0 [pid 563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 566] <... futex resumed>) = 0 [pid 565] memfd_create("syzkaller", 0 [pid 563] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 566] sendfile(4, 5, NULL, 140737974943952 [pid 565] <... memfd_create resumed>) = 6 [pid 563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 566] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 565] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 563] <... futex resumed>) = 0 [pid 566] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 565] <... mmap resumed>) = 0x7f6f98bca000 [pid 563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 566] <... futex resumed>) = 0 [pid 563] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 566] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 571 attached [pid 571] set_robust_list(0x5555564066e0, 24) = 0 [pid 571] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 571] setpgid(0, 0) = 0 [pid 571] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 571] write(3, "1000", 4) = 4 [pid 571] close(3) = 0 [pid 571] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 571] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 571] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 557] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 571] <... mprotect resumed>) = 0 [pid 564] <... mount resumed>) = 0 [pid 571] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 561] <... openat resumed>) = 5 [pid 537] +++ exited with 0 +++ [pid 565] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 561] ioctl(5, LOOP_SET_FD, 3 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=537, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- ./strace-static-x86_64: Process 572 attached [pid 571] <... clone resumed>, parent_tid=[572], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 572 [pid 564] <... futex resumed>) = 1 [pid 557] <... futex resumed>) = 0 [pid 571] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 571] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... openat resumed>) = 3 [pid 571] <... futex resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 571] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 571] <... mmap resumed>) = 0x7f6fa0fca000 [pid 565] <... write resumed>) = 1048576 [pid 411] close(3 [pid 571] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 411] <... close resumed>) = 0 [pid 571] <... mprotect resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 571] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 573 [pid 571] <... clone resumed>, parent_tid=[574], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 574 [pid 571] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 571] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 565] munmap(0x7f6f98bca000, 1048576) = 0 [pid 565] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [ 20.218332][ T553] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 20.240183][ T553] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 20.246428][ T561] loop0: detected capacity change from 0 to 2048 [pid 565] ioctl(7, LOOP_SET_FD, 6./strace-static-x86_64: Process 574 attached [pid 572] set_robust_list(0x7f6fa100b9e0, 24 [pid 565] <... ioctl resumed>) = 0 [pid 564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 557] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 573 attached [pid 574] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 573] set_robust_list(0x5555564066e0, 24 [pid 574] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 561] <... ioctl resumed>) = 0 [pid 574] <... open resumed>) = 3 [pid 573] <... set_robust_list resumed>) = 0 [pid 574] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 573] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 561] close(3 [pid 574] <... futex resumed>) = 1 [pid 573] <... prctl resumed>) = 0 [pid 572] <... set_robust_list resumed>) = 0 [pid 571] <... futex resumed>) = 0 [pid 564] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 561] <... close resumed>) = 0 [pid 557] <... futex resumed>) = 0 [pid 574] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 573] setpgid(0, 0 [pid 572] memfd_create("syzkaller", 0 [pid 571] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 564] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 561] mkdir("./bus", 0777 [pid 557] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 554] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 574] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 573] <... setpgid resumed>) = 0 [pid 571] <... futex resumed>) = 0 [pid 564] <... open resumed>) = 3 [pid 554] ioctl(6, LOOP_CLR_FD [pid 574] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 573] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 572] <... memfd_create resumed>) = 4 [pid 571] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 565] close(6 [pid 564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 554] <... ioctl resumed>) = 0 [pid 574] <... mount resumed>) = 0 [pid 573] <... openat resumed>) = 3 [pid 572] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 565] <... close resumed>) = 0 [pid 564] <... futex resumed>) = 1 [pid 557] <... futex resumed>) = 0 [pid 554] close(6 [pid 574] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 573] write(3, "1000", 4 [pid 572] <... mmap resumed>) = 0x7f6f98bca000 [pid 565] mkdir("./bus", 0777 [pid 554] <... close resumed>) = 0 [pid 557] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 574] <... futex resumed>) = 1 [pid 573] <... write resumed>) = 4 [pid 571] <... futex resumed>) = 0 [pid 564] openat(-1, "/proc/self/exe", O_RDONLY [pid 574] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 573] close(3 [pid 571] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 565] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 554] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 574] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 573] <... close resumed>) = 0 [pid 572] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 571] <... futex resumed>) = 0 [pid 564] <... openat resumed>) = 6 [pid 561] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 557] <... futex resumed>) = 0 [pid 546] exit_group(0 [pid 574] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 573] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 572] <... write resumed>) = 1048576 [pid 571] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 565] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 561] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 557] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 556] <... futex resumed>) = ? [pid 554] <... futex resumed>) = ? [pid 553] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 546] <... exit_group resumed>) = ? [pid 574] <... open resumed>) = 5 [pid 573] <... futex resumed>) = 0 [pid 572] munmap(0x7f6f98bca000, 1048576 [pid 564] <... futex resumed>) = 0 [pid 557] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 556] +++ exited with 0 +++ [pid 554] +++ exited with 0 +++ [pid 553] ioctl(7, LOOP_CLR_FD [pid 574] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 573] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 572] <... munmap resumed>) = 0 [pid 564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 557] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 553] <... ioctl resumed>) = 0 [pid 574] <... futex resumed>) = 1 [pid 573] <... mmap resumed>) = 0x7f6fa0feb000 [pid 572] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 571] <... futex resumed>) = 0 [pid 564] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 557] <... futex resumed>) = 0 [pid 553] close(7 [pid 574] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 573] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 572] <... openat resumed>) = 6 [pid 571] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 564] sendfile(3, 6, NULL, 140737974943952 [pid 557] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 553] <... close resumed>) = 0 [pid 574] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 573] <... mprotect resumed>) = 0 [pid 572] ioctl(6, LOOP_SET_FD, 4 [pid 571] <... futex resumed>) = 0 [pid 553] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 574] openat(-1, "/proc/self/exe", O_RDONLY [pid 573] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 572] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 571] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 564] <... sendfile resumed>) = 1048576 [pid 553] <... futex resumed>) = 0 [ 20.250150][ T554] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 20.267035][ T565] loop5: detected capacity change from 0 to 2048 [ 20.270165][ T554] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 547] exit_group(0 [pid 574] <... openat resumed>) = 7 [pid 572] ioctl(6, LOOP_CLR_FD [pid 564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 555] <... futex resumed>) = ? [pid 547] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 575 attached [pid 574] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 573] <... clone resumed>, parent_tid=[575], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 575 [pid 572] <... ioctl resumed>) = 0 [pid 564] <... futex resumed>) = 1 [pid 557] <... futex resumed>) = 0 [pid 555] +++ exited with 0 +++ [pid 553] +++ exited with 0 +++ [pid 575] set_robust_list(0x7f6fa100b9e0, 24 [pid 574] <... futex resumed>) = 1 [pid 573] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 571] <... futex resumed>) = 0 [pid 575] <... set_robust_list resumed>) = 0 [pid 574] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 573] <... futex resumed>) = 0 [pid 571] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 575] memfd_create("syzkaller", 0 [pid 574] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 573] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 571] <... futex resumed>) = 0 [pid 575] <... memfd_create resumed>) = 3 [pid 574] sendfile(5, 7, NULL, 140737974943952 [pid 573] <... futex resumed>) = 0 [pid 571] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 575] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 574] <... sendfile resumed>) = 1048576 [pid 573] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 572] ioctl(6, LOOP_SET_FD, 4 [pid 564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 561] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 546] +++ exited with 0 +++ [pid 574] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 573] <... mmap resumed>) = 0x7f6fa0fca000 [pid 572] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 561] ioctl(5, LOOP_CLR_FD [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=546, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 575] <... mmap resumed>) = 0x7f6f98bca000 [pid 575] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 574] <... futex resumed>) = 1 [pid 573] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 572] close(6 [pid 571] <... futex resumed>) = 0 [pid 574] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 573] <... mprotect resumed>) = 0 [pid 572] <... close resumed>) = 0 [pid 573] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 572] close(4) = 0 [pid 561] <... ioctl resumed>) = 0 [pid 573] <... clone resumed>, parent_tid=[578], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 578 [pid 572] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 571] exit_group(0 [pid 561] close(5 [pid 574] <... futex resumed>) = ? [pid 573] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 572] <... futex resumed>) = ? [pid 571] <... exit_group resumed>) = ? [pid 561] <... close resumed>) = 0 [pid 574] +++ exited with 0 +++ [pid 573] <... futex resumed>) = 0 [pid 572] +++ exited with 0 +++ [pid 571] +++ exited with 0 +++ [pid 561] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 573] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 561] <... futex resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 561] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 579 ./strace-static-x86_64: Process 579 attached ./strace-static-x86_64: Process 578 attached [pid 578] set_robust_list(0x7f6fa0fea9e0, 24 [pid 579] set_robust_list(0x5555564066e0, 24 [pid 578] <... set_robust_list resumed>) = 0 [pid 578] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 579] <... set_robust_list resumed>) = 0 [pid 578] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 573] <... futex resumed>) = 0 [pid 557] exit_group(0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=571, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 579] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 578] <... futex resumed>) = 1 [pid 575] <... write resumed>) = 1048576 [pid 573] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 564] <... futex resumed>) = ? [pid 561] <... futex resumed>) = ? [pid 557] <... exit_group resumed>) = ? [pid 579] <... prctl resumed>) = 0 [pid 578] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 575] munmap(0x7f6f98bca000, 1048576 [pid 573] <... futex resumed>) = 0 [pid 564] +++ exited with 0 +++ [pid 561] +++ exited with 0 +++ [pid 575] <... munmap resumed>) = 0 [pid 573] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 565] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 579] setpgid(0, 0 [pid 575] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 565] ioctl(7, LOOP_CLR_FD [pid 408] <... openat resumed>) = 3 [pid 578] <... mount resumed>) = 0 [pid 575] <... openat resumed>) = 5 [pid 565] <... ioctl resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 575] ioctl(5, LOOP_SET_FD, 3 [pid 565] close(7 [pid 408] <... ioctl resumed>) = 0 [ 20.313930][ T553] syz-executor138 (553) used greatest stack depth: 22400 bytes left [ 20.321994][ T561] EXT4-fs warning (device loop0): read_mmp_block:107: Error -117 while reading MMP block 64 [ 20.334415][ T565] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 20.348048][ T565] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 579] <... setpgid resumed>) = 0 [pid 578] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 565] <... close resumed>) = 0 [pid 408] close(3 [pid 565] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... close resumed>) = 0 [pid 565] <... futex resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 580 attached [pid 579] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 578] <... futex resumed>) = 1 [pid 575] <... ioctl resumed>) = 0 [pid 573] <... futex resumed>) = 0 [pid 565] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 563] exit_group(0 [pid 579] <... openat resumed>) = 3 [pid 578] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 573] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 580 [pid 579] write(3, "1000", 4 [pid 578] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 566] <... futex resumed>) = ? [pid 565] <... futex resumed>) = ? [pid 563] <... exit_group resumed>) = ? [pid 575] close(3 [pid 573] <... futex resumed>) = 0 [pid 566] +++ exited with 0 +++ [pid 578] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 565] +++ exited with 0 +++ [pid 580] set_robust_list(0x5555564066e0, 24) = 0 [pid 580] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 573] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 578] <... open resumed>) = 6 [pid 580] <... prctl resumed>) = 0 [pid 578] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 579] <... write resumed>) = 4 [pid 580] setpgid(0, 0) = 0 [pid 580] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 578] <... futex resumed>) = 1 [pid 573] <... futex resumed>) = 0 [pid 579] close(3 [pid 578] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 575] <... close resumed>) = 0 [pid 580] <... openat resumed>) = 3 [pid 573] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 580] write(3, "1000", 4 [pid 579] <... close resumed>) = 0 [pid 578] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 575] mkdir("./bus", 0777 [pid 573] <... futex resumed>) = 0 [pid 578] openat(-1, "/proc/self/exe", O_RDONLY [pid 579] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 573] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 580] <... write resumed>) = 4 [pid 575] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 580] close(3 [pid 579] <... futex resumed>) = 0 [pid 575] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 578] <... openat resumed>) = 3 [pid 578] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 573] <... futex resumed>) = 0 [pid 578] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 573] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 578] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 573] <... futex resumed>) = 0 [pid 578] sendfile(6, 3, NULL, 140737974943952 [pid 573] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 580] <... close resumed>) = 0 [pid 579] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 575] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 580] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 579] <... mmap resumed>) = 0x7f6fa0feb000 [pid 575] ioctl(5, LOOP_CLR_FD [pid 580] <... futex resumed>) = 0 [pid 579] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 575] <... ioctl resumed>) = 0 [pid 580] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 579] <... mprotect resumed>) = 0 [pid 580] <... mmap resumed>) = 0x7f6fa0feb000 [pid 579] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 575] close(5 [pid 580] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 575] <... close resumed>) = 0 [pid 580] <... mprotect resumed>) = 0 [pid 579] <... clone resumed>, parent_tid=[581], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 581 [pid 575] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 580] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 579] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 575] <... futex resumed>) = 0 [pid 579] <... futex resumed>) = 0 [pid 575] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 580] <... clone resumed>, parent_tid=[582], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 582 [pid 579] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 580] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 579] <... futex resumed>) = 0 [pid 580] <... futex resumed>) = 0 [pid 579] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 580] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 579] <... mmap resumed>) = 0x7f6fa0fca000 [pid 580] <... futex resumed>) = 0 [pid 579] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 580] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 579] <... mprotect resumed>) = 0 [pid 580] <... mmap resumed>) = 0x7f6fa0fca000 [pid 579] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 580] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 579] <... clone resumed>, parent_tid=[583], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 583 [pid 580] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 579] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 580] <... clone resumed>, parent_tid=[584], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 584 [pid 579] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 580] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 580] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 584 attached [pid 584] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 584] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 584] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 580] <... futex resumed>) = 0 [pid 580] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 580] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 584] <... futex resumed>) = 1 [pid 584] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 584] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 580] <... futex resumed>) = 0 ./strace-static-x86_64: Process 582 attached ./strace-static-x86_64: Process 581 attached [pid 580] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 580] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 584] <... futex resumed>) = 1 [pid 584] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 584] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 580] <... futex resumed>) = 0 [pid 580] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 580] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 584] <... futex resumed>) = 1 [pid 584] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 584] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 580] <... futex resumed>) = 0 [pid 580] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 580] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 584] <... futex resumed>) = 1 [pid 584] sendfile(4, 5, NULL, 140737974943952./strace-static-x86_64: Process 583 attached [pid 583] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 583] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 582] set_robust_list(0x7f6fa100b9e0, 24 [pid 581] set_robust_list(0x7f6fa100b9e0, 24 [pid 583] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 582] <... set_robust_list resumed>) = 0 [pid 581] <... set_robust_list resumed>) = 0 [pid 578] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 547] +++ exited with 0 +++ [pid 582] memfd_create("syzkaller", 0 [pid 581] memfd_create("syzkaller", 0 [pid 583] <... futex resumed>) = 1 [pid 582] <... memfd_create resumed>) = 6 [pid 581] <... memfd_create resumed>) = 4 [pid 579] <... futex resumed>) = 0 [pid 578] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 583] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 582] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 581] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 579] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=547, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 583] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 582] <... mmap resumed>) = 0x7f6f98bca000 [pid 581] <... mmap resumed>) = 0x7f6f98bca000 [pid 579] <... futex resumed>) = 0 [pid 578] <... futex resumed>) = 1 [pid 573] <... futex resumed>) = 0 [pid 583] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 582] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 581] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 578] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 573] exit_group(0 [pid 563] +++ exited with 0 +++ [pid 557] +++ exited with 0 +++ [pid 584] <... sendfile resumed>) = 1048576 [pid 583] <... mount resumed>) = 0 [pid 582] <... write resumed>) = 1048576 [pid 581] <... write resumed>) = 1048576 [pid 579] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 578] <... futex resumed>) = ? [pid 573] <... exit_group resumed>) = ? [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=563, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=557, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 584] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 583] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 582] munmap(0x7f6f98bca000, 1048576 [pid 581] munmap(0x7f6f98bca000, 1048576 [pid 578] +++ exited with 0 +++ [pid 575] <... futex resumed>) = ? [pid 583] <... futex resumed>) = 1 [pid 582] <... munmap resumed>) = 0 [pid 581] <... munmap resumed>) = 0 [pid 579] <... futex resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 583] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 582] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 581] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 579] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 583] <... open resumed>) = 5 [pid 582] <... openat resumed>) = 7 [pid 581] <... openat resumed>) = 6 [pid 579] <... futex resumed>) = 0 [pid 575] +++ exited with 0 +++ [pid 573] +++ exited with 0 +++ [pid 580] <... futex resumed>) = 0 [pid 584] <... futex resumed>) = 1 [pid 410] <... openat resumed>) = 3 [pid 583] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 582] ioctl(7, LOOP_SET_FD, 6 [pid 581] ioctl(6, LOOP_SET_FD, 4 [ 20.361452][ T575] loop4: detected capacity change from 0 to 2048 [ 20.372340][ T575] EXT4-fs (loop4): VFS: Can't find ext4 filesystem [ 20.372383][ T578] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 20.390597][ T578] File: /root/bus PID: 578 Comm: syz-executor138 [pid 579] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=573, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 584] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 583] <... futex resumed>) = 0 [pid 582] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 579] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 410] <... close resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 412] <... openat resumed>) = 3 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 407] ioctl(3, LOOP_CLR_FD [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 585 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 412] close(3 [pid 407] close(3 [pid 412] <... close resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 586 attached ./strace-static-x86_64: Process 585 attached [pid 583] openat(-1, "/proc/self/exe", O_RDONLY [pid 582] ioctl(7, LOOP_CLR_FD [pid 581] <... ioctl resumed>) = 0 [pid 579] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 586] set_robust_list(0x5555564066e0, 24 [pid 585] set_robust_list(0x5555564066e0, 24 [pid 583] <... openat resumed>) = 7 [pid 582] <... ioctl resumed>) = 0 [pid 581] close(4 [pid 579] <... futex resumed>) = 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 586 [pid 586] <... set_robust_list resumed>) = 0 [pid 585] <... set_robust_list resumed>) = 0 [pid 583] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 581] <... close resumed>) = 0 [pid 579] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 586] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 585] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 583] <... futex resumed>) = 0 [pid 581] mkdir("./bus", 0777 [pid 579] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 587 [pid 586] <... prctl resumed>) = 0 [pid 585] <... prctl resumed>) = 0 [pid 583] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 581] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 579] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 586] setpgid(0, 0 [pid 585] setpgid(0, 0 [pid 583] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 581] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 579] <... futex resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 586] <... setpgid resumed>) = 0 [pid 585] <... setpgid resumed>) = 0 [pid 583] sendfile(5, 7, NULL, 140737974943952 [pid 582] ioctl(7, LOOP_SET_FD, 6 [pid 579] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] ioctl(3, LOOP_CLR_FD [pid 586] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 585] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 582] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 411] <... ioctl resumed>) = 0 [pid 586] <... openat resumed>) = 3 [pid 585] <... openat resumed>) = 3 [pid 582] close(7 [pid 411] close(3 [pid 586] write(3, "1000", 4 [pid 585] write(3, "1000", 4 [pid 582] <... close resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 586] <... write resumed>) = 4 [pid 585] <... write resumed>) = 4 [pid 582] close(6 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 586] close(3 [pid 585] close(3 [pid 582] <... close resumed>) = 0 [pid 586] <... close resumed>) = 0 [pid 585] <... close resumed>) = 0 [pid 582] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 588 [pid 586] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 585] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 582] <... futex resumed>) = 0 [pid 580] exit_group(0./strace-static-x86_64: Process 587 attached [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 580] <... exit_group resumed>) = ? [pid 587] set_robust_list(0x5555564066e0, 24 [pid 586] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 585] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 584] <... futex resumed>) = ? [pid 582] +++ exited with 0 +++ [pid 587] <... set_robust_list resumed>) = 0 [pid 586] <... mmap resumed>) = 0x7f6fa0feb000 [pid 585] <... mmap resumed>) = 0x7f6fa0feb000 [pid 587] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 586] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 585] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 587] <... prctl resumed>) = 0 [pid 586] <... mprotect resumed>) = 0 [pid 585] <... mprotect resumed>) = 0 [pid 587] setpgid(0, 0 [pid 586] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 585] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 587] <... setpgid resumed>) = 0 [pid 587] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 586] <... clone resumed>, parent_tid=[589], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 589 [pid 585] <... clone resumed>, parent_tid=[590], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 590 [pid 587] <... openat resumed>) = 3 [pid 586] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 585] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 587] write(3, "1000", 4 [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 587] <... write resumed>) = 4 [pid 586] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 585] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 587] close(3 [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 587] <... close resumed>) = 0 [pid 586] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 585] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 587] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 586] <... mmap resumed>) = 0x7f6fa0fca000 [pid 585] <... mmap resumed>) = 0x7f6fa0fca000 [pid 587] <... futex resumed>) = 0 [pid 586] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 585] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 587] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 586] <... mprotect resumed>) = 0 [pid 585] <... mprotect resumed>) = 0 [pid 587] <... mmap resumed>) = 0x7f6fa0feb000 [pid 586] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 585] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 587] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 583] <... sendfile resumed>) = 1048576 [pid 587] <... mprotect resumed>) = 0 [pid 586] <... clone resumed>, parent_tid=[591], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 591 [pid 585] <... clone resumed>, parent_tid=[592], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 592 [pid 587] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 586] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 583] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 583] <... futex resumed>) = 1 [pid 579] <... futex resumed>) = 0 ./strace-static-x86_64: Process 593 attached ./strace-static-x86_64: Process 592 attached ./strace-static-x86_64: Process 591 attached ./strace-static-x86_64: Process 590 attached ./strace-static-x86_64: Process 589 attached ./strace-static-x86_64: Process 588 attached [pid 587] <... clone resumed>, parent_tid=[593], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 593 [pid 586] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 583] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 593] set_robust_list(0x7f6fa100b9e0, 24 [pid 592] set_robust_list(0x7f6fa0fea9e0, 24 [pid 591] set_robust_list(0x7f6fa0fea9e0, 24 [pid 590] set_robust_list(0x7f6fa100b9e0, 24 [pid 589] set_robust_list(0x7f6fa100b9e0, 24 [pid 588] set_robust_list(0x5555564066e0, 24 [pid 593] <... set_robust_list resumed>) = 0 [pid 592] <... set_robust_list resumed>) = 0 [pid 591] <... set_robust_list resumed>) = 0 [pid 590] <... set_robust_list resumed>) = 0 [pid 589] <... set_robust_list resumed>) = 0 [pid 588] <... set_robust_list resumed>) = 0 [pid 587] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 581] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 587] <... futex resumed>) = 0 [pid 581] ioctl(6, LOOP_CLR_FD [pid 587] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 581] <... ioctl resumed>) = 0 [pid 587] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 581] close(6 [pid 587] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 581] <... close resumed>) = 0 [pid 587] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 581] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 579] exit_group(0 [pid 587] <... clone resumed>, parent_tid=[594], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 594 [pid 583] <... futex resumed>) = ? [pid 581] <... futex resumed>) = ? [pid 579] <... exit_group resumed>) = ? [pid 587] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 584] +++ exited with 0 +++ [pid 583] +++ exited with 0 +++ [pid 580] +++ exited with 0 +++ [pid 593] memfd_create("syzkaller", 0 [pid 587] <... futex resumed>) = 0 [pid 590] memfd_create("syzkaller", 0 [pid 593] <... memfd_create resumed>) = 3 [pid 587] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 594 attached [pid 594] set_robust_list(0x7f6fa0fea9e0, 24 [pid 593] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=580, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 593] <... mmap resumed>) = 0x7f6f98bca000 [pid 588] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 590] <... memfd_create resumed>) = 3 [pid 594] <... set_robust_list resumed>) = 0 [pid 594] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 593] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 590] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 588] <... prctl resumed>) = 0 [pid 590] <... mmap resumed>) = 0x7f6f98bca000 [pid 588] setpgid(0, 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 589] memfd_create("syzkaller", 0 [pid 408] <... openat resumed>) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 595 [pid 589] <... memfd_create resumed>) = 3 [pid 588] <... setpgid resumed>) = 0 [pid 588] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 589] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 588] write(3, "1000", 4) = 4 [pid 588] close(3 [pid 589] <... mmap resumed>) = 0x7f6f98bca000 [pid 588] <... close resumed>) = 0 [pid 588] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 595 attached [pid 595] set_robust_list(0x5555564066e0, 24 [pid 588] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 595] <... set_robust_list resumed>) = 0 [pid 595] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 588] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 591] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 588] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 595] <... prctl resumed>) = 0 [pid 595] setpgid(0, 0) = 0 [pid 595] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 588] <... clone resumed>, parent_tid=[596], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 596 [pid 588] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 588] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 588] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 588] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 588] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 595] <... openat resumed>) = 3 [pid 595] write(3, "1000", 4 [pid 588] <... clone resumed>, parent_tid=[597], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 597 [pid 595] <... write resumed>) = 4 [pid 595] close(3 [pid 588] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 588] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 595] <... close resumed>) = 0 [pid 595] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 595] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 590] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 595] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 595] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[598], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 598 [pid 595] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 595] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 595] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 595] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 595] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[599], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 599 [pid 595] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 595] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 596 attached [pid 596] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 596] memfd_create("syzkaller", 0 [pid 589] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 596] <... memfd_create resumed>) = 3 [pid 596] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 597 attached [pid 597] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 597] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 593] <... write resumed>) = 1048576 [pid 592] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 593] munmap(0x7f6f98bca000, 1048576./strace-static-x86_64: Process 598 attached ) = 0 [pid 598] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 597] <... open resumed>) = 4 [pid 594] <... open resumed>) = 4 [pid 593] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 592] <... open resumed>) = 4 [pid 591] <... open resumed>) = 4 [pid 590] <... write resumed>) = 1048576 [pid 597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 594] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 598] memfd_create("syzkaller", 0 [pid 597] <... futex resumed>) = 1 [pid 594] <... futex resumed>) = 1 [pid 593] <... openat resumed>) = 5 [pid 592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 591] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 590] munmap(0x7f6f98bca000, 1048576 [pid 588] <... futex resumed>) = 0 [pid 587] <... futex resumed>) = 0 [pid 598] <... memfd_create resumed>) = 3 [pid 597] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [ 20.416864][ T581] loop2: detected capacity change from 0 to 2048 [ 20.436128][ T581] EXT4-fs warning (device loop2): read_mmp_block:107: Error -117 while reading MMP block 64 [pid 594] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 593] ioctl(5, LOOP_SET_FD, 3 [pid 592] <... futex resumed>) = 1 [pid 591] <... futex resumed>) = 1 [pid 589] <... write resumed>) = 1048576 [pid 588] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 587] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 598] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 597] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 596] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 592] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 591] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 588] <... futex resumed>) = 0 [pid 587] <... futex resumed>) = 0 [pid 586] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 598] <... mmap resumed>) = 0x7f6f98bca000 [pid 597] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 594] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 587] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 598] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 597] <... mount resumed>) = 0 [pid 594] <... mount resumed>) = 0 [pid 586] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 594] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 597] <... futex resumed>) = 0 [pid 594] <... futex resumed>) = 1 [pid 587] <... futex resumed>) = 0 [pid 597] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 594] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 587] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 587] <... futex resumed>) = 0 [pid 594] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 587] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 594] <... open resumed>) = 6 [pid 594] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 587] <... futex resumed>) = 0 ./strace-static-x86_64: Process 599 attached [pid 594] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 593] <... ioctl resumed>) = 0 [pid 592] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 591] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 590] <... munmap resumed>) = 0 [pid 589] munmap(0x7f6f98bca000, 1048576 [pid 588] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 587] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 599] set_robust_list(0x7f6fa0fea9e0, 24 [pid 598] <... write resumed>) = 1048576 [pid 596] <... write resumed>) = 1048576 [pid 594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 593] close(3 [pid 592] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 591] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 590] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 589] <... munmap resumed>) = 0 [pid 588] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 587] <... futex resumed>) = 0 [pid 599] <... set_robust_list resumed>) = 0 [pid 598] munmap(0x7f6f98bca000, 1048576 [pid 596] munmap(0x7f6f98bca000, 1048576 [pid 594] openat(-1, "/proc/self/exe", O_RDONLY [pid 593] <... close resumed>) = 0 [pid 592] <... mount resumed>) = 0 [pid 591] <... mount resumed>) = 0 [pid 590] <... openat resumed>) = 5 [pid 589] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 588] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 587] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 599] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 598] <... munmap resumed>) = 0 [pid 597] <... futex resumed>) = 0 [pid 596] <... munmap resumed>) = 0 [pid 594] <... openat resumed>) = 3 [pid 593] mkdir("./bus", 0777 [pid 592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 591] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 590] ioctl(5, LOOP_SET_FD, 3 [pid 589] <... openat resumed>) = 5 [pid 588] <... futex resumed>) = 1 [pid 599] <... open resumed>) = 4 [pid 598] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 597] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 596] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 594] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 593] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 592] <... futex resumed>) = 1 [pid 591] <... futex resumed>) = 1 [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 597] <... open resumed>) = 5 [pid 594] <... futex resumed>) = 1 [pid 587] <... futex resumed>) = 0 [pid 586] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 594] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 587] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 597] <... futex resumed>) = 0 [pid 594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 587] <... futex resumed>) = 0 [pid 586] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 597] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 594] sendfile(6, 3, NULL, 140737974943952 [pid 587] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 594] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 594] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 587] <... futex resumed>) = 0 [pid 594] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 589] ioctl(5, LOOP_SET_FD, 3 [pid 599] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 596] <... openat resumed>) = 6 [pid 593] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 592] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 591] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 590] <... ioctl resumed>) = 0 [pid 588] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 599] <... futex resumed>) = 1 [pid 596] ioctl(6, LOOP_SET_FD, 3 [pid 590] close(3 [pid 588] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 599] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 595] <... futex resumed>) = 0 [pid 590] <... close resumed>) = 0 [pid 595] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 595] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 589] <... ioctl resumed>) = 0 [pid 589] close(3) = 0 [pid 589] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 589] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 588] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 597] <... futex resumed>) = 0 [pid 588] <... futex resumed>) = 1 [pid 597] openat(-1, "/proc/self/exe", O_RDONLY [pid 588] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 597] <... openat resumed>) = 7 [pid 597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 599] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 596] <... ioctl resumed>) = 0 [pid 592] <... open resumed>) = 6 [pid 591] <... open resumed>) = 6 [pid 590] mkdir("./bus", 0777 [pid 599] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 591] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 590] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 599] <... mount resumed>) = 0 [pid 592] <... futex resumed>) = 1 [pid 591] <... futex resumed>) = 1 [pid 590] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 599] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 592] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 591] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 599] <... futex resumed>) = 1 [pid 599] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 596] close(3) = 0 [pid 596] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 596] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 598] <... openat resumed>) = 5 [pid 597] <... futex resumed>) = 1 [pid 595] <... futex resumed>) = 0 [pid 588] <... futex resumed>) = 0 [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 598] ioctl(5, LOOP_SET_FD, 3 [pid 597] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 595] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 588] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 586] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 599] <... futex resumed>) = 0 [pid 595] <... futex resumed>) = 1 [pid 592] <... futex resumed>) = 0 [pid 591] <... futex resumed>) = 0 [pid 586] <... futex resumed>) = 1 [pid 585] <... futex resumed>) = 1 [pid 581] +++ exited with 0 +++ [pid 579] +++ exited with 0 +++ [pid 588] <... futex resumed>) = 0 [pid 597] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 599] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 597] sendfile(5, 7, NULL, 140737974943952 [pid 595] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 592] openat(-1, "/proc/self/exe", O_RDONLY [pid 591] openat(-1, "/proc/self/exe", O_RDONLY [pid 588] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 586] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=579, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 592] <... openat resumed>) = 3 [pid 591] <... openat resumed>) = 3 [pid 592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 591] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 599] <... open resumed>) = 6 [pid 598] <... ioctl resumed>) = 0 [pid 592] <... futex resumed>) = 1 [pid 591] <... futex resumed>) = 1 [pid 585] <... futex resumed>) = 0 [pid 599] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 598] close(3 [pid 592] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 591] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 599] <... futex resumed>) = 1 [pid 598] <... close resumed>) = 0 [pid 595] <... futex resumed>) = 0 [pid 592] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 599] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 598] mkdir("./bus", 0777 [pid 595] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 592] sendfile(6, 3, NULL, 140737974943952 [pid 586] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... openat resumed>) = 3 [pid 599] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 598] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 595] <... futex resumed>) = 0 [pid 591] <... futex resumed>) = 0 [pid 586] <... futex resumed>) = 1 [pid 409] ioctl(3, LOOP_CLR_FD [pid 599] openat(-1, "/proc/self/exe", O_RDONLY [pid 598] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 595] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 591] sendfile(6, 3, NULL, 140737974943952 [pid 586] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 599] <... openat resumed>) = 3 [pid 409] close(3 [pid 599] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [ 20.478191][ T593] loop0: detected capacity change from 0 to 2048 [ 20.497518][ T590] loop3: detected capacity change from 0 to 2048 [ 20.500954][ T589] loop5: detected capacity change from 0 to 2048 [ 20.505005][ T596] loop4: detected capacity change from 0 to 2048 [ 20.520842][ T598] loop1: detected capacity change from 0 to 2048 [pid 595] <... futex resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 599] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 597] <... sendfile resumed>) = 1048576 [pid 595] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 592] <... sendfile resumed>) = 1048576 [pid 591] <... sendfile resumed>) = 1048576 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 599] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 595] <... futex resumed>) = 0 [pid 592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 591] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 599] sendfile(6, 3, NULL, 140737974943952 [pid 595] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 592] <... futex resumed>) = 1 [pid 591] <... futex resumed>) = 1 [pid 586] <... futex resumed>) = 0 [pid 585] <... futex resumed>) = 0 ./strace-static-x86_64: Process 606 attached [pid 599] <... sendfile resumed>) = 1048576 [pid 597] <... futex resumed>) = 1 [pid 592] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 591] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 588] <... futex resumed>) = 0 [pid 599] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 599] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 597] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 595] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 606 [ 20.563552][ T600] EXT4-fs warning (device loop5): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 20.573613][ T596] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 20.575231][ T604] EXT4-fs warning (device loop1): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 20.588865][ T589] EXT4-fs (loop5): get root inode failed [ 20.604808][ T589] EXT4-fs (loop5): mount failed [pid 606] set_robust_list(0x5555564066e0, 24) = 0 [pid 606] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 606] setpgid(0, 0) = 0 [pid 606] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 589] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 589] ioctl(5, LOOP_CLR_FD) = 0 [pid 589] close(5) = 0 [pid 606] <... openat resumed>) = 3 [pid 589] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 606] write(3, "1000", 4 [pid 589] <... futex resumed>) = 0 [pid 589] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 586] exit_group(0 [pid 591] <... futex resumed>) = ? [pid 589] <... futex resumed>) = ? [pid 586] <... exit_group resumed>) = ? [ 20.610110][ T593] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 20.624808][ T596] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 20.637940][ T598] EXT4-fs (loop1): get root inode failed [ 20.643929][ T590] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 591] +++ exited with 0 +++ [pid 589] +++ exited with 0 +++ [pid 586] +++ exited with 0 +++ [pid 606] <... write resumed>) = 4 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=586, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 606] close(3) = 0 [pid 606] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 606] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 606] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 606] <... mmap resumed>) = 0x7f6fa0feb000 [pid 606] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 412] <... ioctl resumed>) = 0 [pid 606] <... mprotect resumed>) = 0 [pid 412] close(3 [pid 598] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 598] ioctl(5, LOOP_CLR_FD) = 0 [pid 598] close(5) = 0 [pid 598] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 598] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 606] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 596] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 412] <... close resumed>) = 0 [pid 596] ioctl(6, LOOP_CLR_FD [pid 595] exit_group(0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 612 attached [pid 606] <... clone resumed>, parent_tid=[612], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 612 [pid 599] <... futex resumed>) = ? [pid 598] <... futex resumed>) = ? [pid 596] <... ioctl resumed>) = 0 [pid 595] <... exit_group resumed>) = ? [pid 606] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 599] +++ exited with 0 +++ [pid 598] +++ exited with 0 +++ [pid 596] close(6 [pid 595] +++ exited with 0 +++ [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 613 [pid 606] <... futex resumed>) = 0 [pid 596] <... close resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=595, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 612] set_robust_list(0x7f6fa100b9e0, 24 [pid 606] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 596] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 606] <... futex resumed>) = 0 [pid 596] <... futex resumed>) = 0 [pid 606] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 596] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 612] <... set_robust_list resumed>) = 0 [pid 606] <... mmap resumed>) = 0x7f6fa0fca000 [pid 590] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 590] ioctl(5, LOOP_CLR_FD [pid 612] memfd_create("syzkaller", 0 [pid 606] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 590] <... ioctl resumed>) = 0 [pid 588] exit_group(0 [pid 597] <... futex resumed>) = 230 [pid 590] close(5 [pid 588] <... exit_group resumed>) = ? [pid 597] +++ exited with 0 +++ [pid 596] <... futex resumed>) = ? [pid 590] <... close resumed>) = 0 [pid 606] <... mprotect resumed>) = 0 [pid 596] +++ exited with 0 +++ [pid 588] +++ exited with 0 +++ [pid 606] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=588, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 606] <... clone resumed>, parent_tid=[614], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 614 [pid 411] <... restart_syscall resumed>) = 0 [pid 606] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 606] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 590] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 590] <... futex resumed>) = 0 [pid 585] exit_group(0 [pid 411] <... openat resumed>) = 3 [pid 592] <... futex resumed>) = ? [pid 585] <... exit_group resumed>) = ? [pid 411] ioctl(3, LOOP_CLR_FD [pid 592] +++ exited with 0 +++ [pid 590] +++ exited with 0 +++ [pid 411] <... ioctl resumed>) = 0 [pid 411] close(3 [pid 612] <... memfd_create resumed>) = 3 [pid 411] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 615 ./strace-static-x86_64: Process 613 attached [pid 613] set_robust_list(0x5555564066e0, 24) = 0 [pid 613] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 613] setpgid(0, 0) = 0 [pid 613] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 613] write(3, "1000", 4 [pid 612] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 613] <... write resumed>) = 4 [pid 613] close(3) = 0 [pid 613] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 613] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 612] <... mmap resumed>) = 0x7f6f98bca000 [pid 613] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 613] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[616], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 616 [pid 613] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 613] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... openat resumed>) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 617 [pid 613] <... futex resumed>) = 0 [pid 613] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 613] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 613] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[618], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 618 [pid 613] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 613] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 616 attached [pid 616] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 616] memfd_create("syzkaller", 0) = 3 [pid 616] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 612] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 615 attached ./strace-static-x86_64: Process 617 attached ./strace-static-x86_64: Process 614 attached [pid 615] set_robust_list(0x5555564066e0, 24 [pid 614] set_robust_list(0x7f6fa0fea9e0, 24 [pid 617] set_robust_list(0x5555564066e0, 24 [pid 615] <... set_robust_list resumed>) = 0 [pid 614] <... set_robust_list resumed>) = 0 [pid 617] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 618 attached [pid 615] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 614] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 617] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 615] <... prctl resumed>) = 0 [pid 618] set_robust_list(0x7f6fa0fea9e0, 24 [pid 617] <... prctl resumed>) = 0 [pid 615] setpgid(0, 0 [pid 614] <... open resumed>) = 4 [pid 585] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=585, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 619 [ 20.644204][ T593] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 20.659717][ T598] EXT4-fs (loop1): mount failed [ 20.673765][ T590] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 616] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 615] <... setpgid resumed>) = 0 [pid 617] setpgid(0, 0 [pid 616] <... write resumed>) = 1048576 [pid 616] munmap(0x7f6f98bca000, 1048576) = 0 [pid 616] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [pid 616] ioctl(4, LOOP_SET_FD, 3 [pid 617] <... setpgid resumed>) = 0 [pid 615] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 614] <... futex resumed>) = 1 [pid 606] <... futex resumed>) = 0 [pid 616] <... ioctl resumed>) = 0 [pid 616] close(3) = 0 [pid 616] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 616] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 606] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 606] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 612] <... write resumed>) = 1048576 [pid 612] munmap(0x7f6f98bca000, 1048576) = 0 [pid 612] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 5 [pid 612] ioctl(5, LOOP_SET_FD, 3 [pid 614] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 617] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 614] <... mount resumed>) = 0 [pid 615] <... openat resumed>) = 3 [pid 617] <... openat resumed>) = 3 [pid 614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 612] <... ioctl resumed>) = 0 [pid 612] close(3) = 0 [pid 612] mkdir("./bus", 0777 [pid 614] <... futex resumed>) = 1 [pid 606] <... futex resumed>) = 0 [pid 606] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 606] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 617] write(3, "1000", 4 [pid 615] write(3, "1000", 4 [pid 614] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 613] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 613] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 613] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6f98ca9000 [pid 613] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 613] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 617] <... write resumed>) = 4 [pid 615] <... write resumed>) = 4 [pid 614] <... open resumed>) = 3 [pid 613] <... clone resumed>, parent_tid=[622], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 622 [pid 613] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 613] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 617] close(3 [pid 615] close(3 [pid 612] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 612] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 622 attached [pid 622] set_robust_list(0x7f6f98cc99e0, 24) = 0 [pid 622] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 615] <... close resumed>) = 0 [pid 614] <... futex resumed>) = 1 [pid 606] <... futex resumed>) = 0 [pid 617] <... close resumed>) = 0 [pid 606] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 606] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 622] <... mount resumed>) = 0 [pid 622] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 613] <... futex resumed>) = 0 [pid 613] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 613] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 614] openat(-1, "/proc/self/exe", O_RDONLY [pid 618] <... set_robust_list resumed>) = 0 [pid 617] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 615] <... futex resumed>) = 0 [pid 618] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 617] <... futex resumed>) = 0 [pid 615] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 614] <... openat resumed>) = 6 [pid 617] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 615] <... mmap resumed>) = 0x7f6fa0feb000 [pid 614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 617] <... mmap resumed>) = 0x7f6fa0feb000 [pid 615] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 614] <... futex resumed>) = 1 [pid 606] <... futex resumed>) = 0 [pid 618] <... open resumed>) = 3 [pid 614] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 606] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 618] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 617] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 615] <... mprotect resumed>) = 0 [ 20.731729][ T616] loop5: detected capacity change from 0 to 2048 [ 20.749324][ T612] loop2: detected capacity change from 0 to 2048 ./strace-static-x86_64: Process 619 attached [pid 622] <... futex resumed>) = 1 [pid 618] <... futex resumed>) = 0 [pid 617] <... mprotect resumed>) = 0 [pid 615] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 614] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 606] <... futex resumed>) = 0 [pid 618] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 617] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 614] sendfile(3, 6, NULL, 140737974943952 [pid 606] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 624 attached ./strace-static-x86_64: Process 623 attached [pid 622] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 619] set_robust_list(0x5555564066e0, 24 [pid 615] <... clone resumed>, parent_tid=[623], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 623 [pid 619] <... set_robust_list resumed>) = 0 [pid 619] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 619] setpgid(0, 0) = 0 [pid 619] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 619] write(3, "1000", 4) = 4 [pid 619] close(3) = 0 [pid 619] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 619] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 622] <... open resumed>) = 5 [pid 619] <... mprotect resumed>) = 0 [pid 619] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 622] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 619] <... clone resumed>, parent_tid=[625], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 625 [pid 613] <... futex resumed>) = 0 [pid 622] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 619] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 613] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 619] <... futex resumed>) = 0 [pid 613] <... futex resumed>) = 1 [pid 619] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 613] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 619] <... futex resumed>) = 0 [pid 619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 619] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 619] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[626], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 626 [pid 619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 623] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 623] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 624] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 624] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 618] <... futex resumed>) = 0 [pid 617] <... clone resumed>, parent_tid=[624], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 624 [pid 615] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 618] openat(-1, "/proc/self/exe", O_RDONLY [pid 617] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 618] <... openat resumed>) = 6 [pid 617] <... futex resumed>) = 1 [pid 615] <... futex resumed>) = 1 [pid 615] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 614] <... sendfile resumed>) = 1048576 [pid 593] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 618] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 617] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 618] <... futex resumed>) = 1 [pid 617] <... futex resumed>) = 0 [pid 615] <... futex resumed>) = 0 [pid 613] <... futex resumed>) = 0 [pid 618] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 617] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 615] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 613] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 593] ioctl(5, LOOP_CLR_FD [pid 618] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 617] <... mmap resumed>) = 0x7f6fa0fca000 [pid 615] <... mmap resumed>) = 0x7f6fa0fca000 [pid 618] sendfile(5, 6, NULL, 140737974943952 [pid 617] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 615] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 614] <... futex resumed>) = 1 [pid 613] <... futex resumed>) = 0 [pid 606] <... futex resumed>) = 0 [pid 613] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] <... mprotect resumed>) = 0 [pid 617] <... mprotect resumed>) = 0 [pid 617] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 615] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 614] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 617] <... clone resumed>, parent_tid=[627], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 627 [pid 617] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 615] <... clone resumed>, parent_tid=[628], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 628 [pid 617] <... futex resumed>) = 0 [pid 617] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 615] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 612] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 612] ioctl(5, LOOP_CLR_FD) = 0 [pid 612] close(5) = 0 [pid 612] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 612] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 606] exit_group(0) = ? [pid 612] <... futex resumed>) = ? [pid 612] +++ exited with 0 +++ ./strace-static-x86_64: Process 625 attached [pid 625] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 625] memfd_create("syzkaller", 0 [pid 614] <... futex resumed>) = ? [pid 625] <... memfd_create resumed>) = 3 [pid 614] +++ exited with 0 +++ [pid 606] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=606, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 625] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 409] <... restart_syscall resumed>) = 0 [pid 618] <... sendfile resumed>) = 1048576 ./strace-static-x86_64: Process 628 attached ./strace-static-x86_64: Process 627 attached ./strace-static-x86_64: Process 626 attached [pid 624] <... futex resumed>) = 0 [pid 623] <... futex resumed>) = 0 [pid 618] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 616] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 593] <... ioctl resumed>) = 0 [pid 618] <... futex resumed>) = 1 [pid 616] ioctl(4, LOOP_CLR_FD [pid 613] <... futex resumed>) = 0 [pid 618] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 616] <... ioctl resumed>) = 0 [pid 616] close(4 [pid 628] set_robust_list(0x7f6fa0fea9e0, 24 [pid 627] set_robust_list(0x7f6fa0fea9e0, 24 [pid 626] set_robust_list(0x7f6fa0fea9e0, 24 [pid 625] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 624] memfd_create("syzkaller", 0 [pid 623] memfd_create("syzkaller", 0 [pid 616] <... close resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 623] <... memfd_create resumed>) = 3 [pid 616] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 624] <... memfd_create resumed>) = 3 [pid 613] exit_group(0 [pid 628] <... set_robust_list resumed>) = 0 [pid 627] <... set_robust_list resumed>) = 0 [pid 626] <... set_robust_list resumed>) = 0 [pid 624] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 623] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 618] <... futex resumed>) = ? [pid 624] <... mmap resumed>) = 0x7f6f98bca000 [pid 616] <... futex resumed>) = ? [pid 613] <... exit_group resumed>) = ? [pid 628] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 627] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 623] <... mmap resumed>) = 0x7f6f98bca000 [pid 618] +++ exited with 0 +++ [pid 616] +++ exited with 0 +++ [pid 622] <... futex resumed>) = ? [pid 593] close(5 [pid 409] <... openat resumed>) = 3 [pid 622] +++ exited with 0 +++ [pid 613] +++ exited with 0 +++ [pid 409] ioctl(3, LOOP_CLR_FD [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=613, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 409] <... ioctl resumed>) = 0 [pid 409] close(3) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 629 [pid 623] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 412] <... ioctl resumed>) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 630 [pid 628] <... open resumed>) = 4 [pid 627] <... open resumed>) = 4 [pid 593] <... close resumed>) = 0 [pid 593] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 20.770336][ T616] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 20.784438][ T616] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 20.785983][ T612] EXT4-fs (loop2): VFS: Can't find ext4 filesystem [pid 593] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 627] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 628] <... futex resumed>) = 1 [pid 627] <... futex resumed>) = 1 [pid 617] <... futex resumed>) = 0 [pid 615] <... futex resumed>) = 0 [pid 587] exit_group(0 [pid 617] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 615] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 594] <... futex resumed>) = ? [pid 593] <... futex resumed>) = ? [pid 587] <... exit_group resumed>) = ? [pid 628] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 627] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 626] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 624] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 617] <... futex resumed>) = 0 [pid 615] <... futex resumed>) = 0 [pid 594] +++ exited with 0 +++ [pid 593] +++ exited with 0 +++ [pid 587] +++ exited with 0 +++ [pid 628] <... mount resumed>) = 0 [pid 627] <... mount resumed>) = 0 [pid 626] <... open resumed>) = 4 [pid 617] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=587, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 627] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 626] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 628] <... futex resumed>) = 1 [pid 627] <... futex resumed>) = 1 [pid 617] <... futex resumed>) = 0 [pid 615] <... futex resumed>) = 0 [pid 628] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 627] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 626] <... futex resumed>) = 1 [pid 619] <... futex resumed>) = 0 [pid 617] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 615] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 628] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 627] <... open resumed>) = 5 [pid 626] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 617] <... futex resumed>) = 0 [pid 615] <... futex resumed>) = 0 [pid 407] <... openat resumed>) = 3 ./strace-static-x86_64: Process 630 attached ./strace-static-x86_64: Process 629 attached [pid 628] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 627] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 626] <... mount resumed>) = 0 [pid 625] <... write resumed>) = 1048576 [pid 624] <... write resumed>) = 1048576 [pid 623] <... write resumed>) = 1048576 [pid 619] <... futex resumed>) = 0 [pid 617] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] ioctl(3, LOOP_CLR_FD [pid 629] set_robust_list(0x5555564066e0, 24 [pid 628] <... open resumed>) = 5 [pid 627] <... futex resumed>) = 0 [pid 626] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 625] munmap(0x7f6f98bca000, 1048576 [pid 624] munmap(0x7f6f98bca000, 1048576 [pid 623] munmap(0x7f6f98bca000, 1048576 [pid 619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 617] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 630] set_robust_list(0x5555564066e0, 24 [pid 629] <... set_robust_list resumed>) = 0 [pid 628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 627] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 626] <... futex resumed>) = 0 [pid 625] <... munmap resumed>) = 0 [pid 624] <... munmap resumed>) = 0 [pid 623] <... munmap resumed>) = 0 [pid 619] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 617] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] close(3 [pid 630] <... set_robust_list resumed>) = 0 [pid 629] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 628] <... futex resumed>) = 1 [pid 627] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 626] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 625] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 624] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 623] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 617] <... futex resumed>) = 0 [pid 615] <... futex resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 630] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 629] <... prctl resumed>) = 0 [pid 628] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 627] openat(-1, "/proc/self/exe", O_RDONLY [pid 626] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 625] <... openat resumed>) = 5 [pid 624] <... openat resumed>) = 6 [pid 619] <... futex resumed>) = 0 [pid 617] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 630] <... prctl resumed>) = 0 [pid 629] setpgid(0, 0 [pid 628] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 627] <... openat resumed>) = 7 [pid 626] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 625] ioctl(5, LOOP_SET_FD, 3 [pid 624] ioctl(6, LOOP_SET_FD, 3 [pid 619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] <... futex resumed>) = 0 [pid 630] setpgid(0, 0 [pid 629] <... setpgid resumed>) = 0 [pid 628] openat(-1, "/proc/self/exe", O_RDONLY [pid 627] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 626] <... open resumed>) = 6 [pid 625] <... ioctl resumed>) = 0 [pid 615] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 630] <... setpgid resumed>) = 0 [pid 629] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 628] <... openat resumed>) = 7 [pid 627] <... futex resumed>) = 1 [pid 626] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 625] close(3 [pid 624] <... ioctl resumed>) = 0 [pid 617] <... futex resumed>) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 631 [pid 630] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 629] <... openat resumed>) = 3 [pid 628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 627] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 626] <... futex resumed>) = 1 [pid 625] <... close resumed>) = 0 [pid 624] close(3 [pid 619] <... futex resumed>) = 0 [pid 617] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 630] <... openat resumed>) = 3 [pid 629] write(3, "1000", 4 [pid 628] <... futex resumed>) = 1 [pid 627] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 626] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 625] mkdir("./bus", 0777 [pid 624] <... close resumed>) = 0 [pid 619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 617] <... futex resumed>) = 0 [pid 615] <... futex resumed>) = 0 [pid 630] write(3, "1000", 4 [pid 629] <... write resumed>) = 4 [pid 628] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 627] sendfile(5, 7, NULL, 140737974943952 [pid 626] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 625] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 624] mkdir("./bus", 0777 [pid 619] <... futex resumed>) = 0 [pid 617] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 631 attached [pid 630] <... write resumed>) = 4 [pid 629] close(3 [pid 628] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 627] <... sendfile resumed>) = 1048576 [pid 626] openat(-1, "/proc/self/exe", O_RDONLY [pid 625] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 624] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 615] <... futex resumed>) = 0 [pid 631] set_robust_list(0x5555564066e0, 24 [pid 630] close(3 [pid 629] <... close resumed>) = 0 [pid 628] sendfile(5, 7, NULL, 140737974943952 [pid 627] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 626] <... openat resumed>) = 3 [pid 624] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 615] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 631] <... set_robust_list resumed>) = 0 [pid 630] <... close resumed>) = 0 [pid 629] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 627] <... futex resumed>) = 1 [pid 626] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 623] <... openat resumed>) = 6 [pid 617] <... futex resumed>) = 0 [pid 631] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 630] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 629] <... futex resumed>) = 0 [pid 627] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 626] <... futex resumed>) = 1 [pid 623] ioctl(6, LOOP_SET_FD, 3 [pid 631] <... prctl resumed>) = 0 [pid 630] <... futex resumed>) = 0 [pid 629] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 626] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 623] <... ioctl resumed>) = 0 [pid 619] <... futex resumed>) = 0 [pid 631] setpgid(0, 0 [pid 630] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 629] <... mmap resumed>) = 0x7f6fa0feb000 [pid 623] close(3 [pid 619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 631] <... setpgid resumed>) = 0 [pid 630] <... mmap resumed>) = 0x7f6fa0feb000 [pid 629] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 623] <... close resumed>) = 0 [pid 619] <... futex resumed>) = 1 [pid 631] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 630] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 629] <... mprotect resumed>) = 0 [pid 626] <... futex resumed>) = 0 [pid 623] mkdir("./bus", 0777 [pid 619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 631] <... openat resumed>) = 3 [pid 630] <... mprotect resumed>) = 0 [pid 629] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 626] sendfile(6, 3, NULL, 140737974943952 [pid 623] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 631] write(3, "1000", 4 [pid 630] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 628] <... sendfile resumed>) = 1048576 [pid 623] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 631] <... write resumed>) = 4 [pid 629] <... clone resumed>, parent_tid=[633], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 633 [pid 628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 631] close(3 [pid 630] <... clone resumed>, parent_tid=[634], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 634 [pid 629] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 628] <... futex resumed>) = 1 [pid 615] <... futex resumed>) = 0 [pid 631] <... close resumed>) = 0 [pid 630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 629] <... futex resumed>) = 0 [pid 628] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 631] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 630] <... futex resumed>) = 0 [pid 629] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 631] <... futex resumed>) = 0 [pid 630] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 629] <... futex resumed>) = 0 [pid 631] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 630] <... futex resumed>) = 0 [pid 629] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 631] <... mmap resumed>) = 0x7f6fa0feb000 [pid 630] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 629] <... mmap resumed>) = 0x7f6fa0fca000 [pid 631] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 630] <... mmap resumed>) = 0x7f6fa0fca000 [pid 629] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 631] <... mprotect resumed>) = 0 [pid 630] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 629] <... mprotect resumed>) = 0 [pid 631] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 630] <... mprotect resumed>) = 0 [pid 629] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 630] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 631] <... clone resumed>, parent_tid=[636], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 636 [pid 629] <... clone resumed>, parent_tid=[637], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 637 [pid 631] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 630] <... clone resumed>, parent_tid=[638], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 638 [pid 629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 631] <... futex resumed>) = 0 [pid 630] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 629] <... futex resumed>) = 0 [pid 631] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 630] <... futex resumed>) = 0 [pid 629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 631] <... futex resumed>) = 0 [pid 630] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 631] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 631] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 631] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[639], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 639 [pid 631] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 631] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 624] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 624] ioctl(6, LOOP_CLR_FD) = 0 [pid 626] <... sendfile resumed>) = 1048576 [pid 624] close(6 [pid 626] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 624] <... close resumed>) = 0 [pid 626] <... futex resumed>) = 1 [pid 624] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 619] <... futex resumed>) = 0 [pid 626] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 624] <... futex resumed>) = 0 [pid 624] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 637 attached [pid 637] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 637] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 637] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 629] <... futex resumed>) = 0 [pid 629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 637] <... futex resumed>) = 1 [pid 629] <... futex resumed>) = 0 [pid 637] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 637] <... mount resumed>) = 0 [pid 617] exit_group(0 [pid 637] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 627] <... futex resumed>) = ? [pid 624] <... futex resumed>) = ? [pid 617] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 639 attached [pid 637] <... futex resumed>) = 1 [pid 629] <... futex resumed>) = 0 [pid 627] +++ exited with 0 +++ [pid 624] +++ exited with 0 +++ [pid 617] +++ exited with 0 +++ [pid 639] set_robust_list(0x7f6fa0fea9e0, 24 [pid 637] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 639] <... set_robust_list resumed>) = 0 [pid 637] <... open resumed>) = 4 [pid 629] <... futex resumed>) = 0 [pid 639] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 637] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [ 20.856389][ T625] loop3: detected capacity change from 0 to 2048 [ 20.863057][ T624] loop1: detected capacity change from 0 to 2048 [ 20.881404][ T624] EXT4-fs (loop1): VFS: Can't find ext4 filesystem [ 20.888769][ T623] loop4: detected capacity change from 0 to 2048 [pid 629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=617, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- ./strace-static-x86_64: Process 638 attached ./strace-static-x86_64: Process 636 attached ./strace-static-x86_64: Process 634 attached ./strace-static-x86_64: Process 633 attached [pid 639] <... open resumed>) = 3 [pid 637] <... futex resumed>) = 0 [pid 629] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 639] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 637] openat(-1, "/proc/self/exe", O_RDONLY [pid 629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 639] <... futex resumed>) = 1 [pid 637] <... openat resumed>) = 5 [pid 631] <... futex resumed>) = 0 [pid 629] <... futex resumed>) = 0 [pid 639] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 637] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 631] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 639] <... mount resumed>) = 0 [pid 637] <... futex resumed>) = 0 [pid 631] <... futex resumed>) = 0 [pid 629] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 639] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 637] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 631] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 639] <... futex resumed>) = 0 [pid 637] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 629] <... futex resumed>) = 0 [pid 639] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 637] sendfile(4, 5, NULL, 140737974943952 [pid 631] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 639] <... open resumed>) = 4 [pid 637] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 631] <... futex resumed>) = 0 [pid 639] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 637] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 631] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 639] <... futex resumed>) = 0 [pid 637] <... futex resumed>) = 1 [pid 631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 629] <... futex resumed>) = 0 [pid 639] openat(-1, "/proc/self/exe", O_RDONLY [pid 637] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 631] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 639] <... openat resumed>) = 5 [pid 631] <... futex resumed>) = 0 [pid 639] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 631] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 639] <... futex resumed>) = 0 [pid 631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 639] sendfile(4, 5, NULL, 140737974943952 [pid 631] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 639] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 631] <... futex resumed>) = 0 [pid 639] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 631] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 639] <... futex resumed>) = 0 [pid 631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 639] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 638] set_robust_list(0x7f6fa0fea9e0, 24 [pid 636] set_robust_list(0x7f6fa100b9e0, 24 [pid 634] set_robust_list(0x7f6fa100b9e0, 24 [pid 633] set_robust_list(0x7f6fa100b9e0, 24 [pid 408] <... openat resumed>) = 3 [pid 638] <... set_robust_list resumed>) = 0 [pid 636] <... set_robust_list resumed>) = 0 [pid 634] <... set_robust_list resumed>) = 0 [pid 633] <... set_robust_list resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 630] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 625] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 630] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 625] ioctl(5, LOOP_CLR_FD [pid 630] <... futex resumed>) = 0 [pid 625] <... ioctl resumed>) = 0 [pid 630] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 625] close(5 [pid 630] <... mmap resumed>) = 0x7f6fa0fa9000 [pid 638] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 636] memfd_create("syzkaller", 0 [pid 634] memfd_create("syzkaller", 0 [pid 633] memfd_create("syzkaller", 0 [pid 630] mprotect(0x7f6fa0faa000, 131072, PROT_READ|PROT_WRITE [pid 625] <... close resumed>) = 0 [pid 408] <... ioctl resumed>) = 0 [pid 636] <... memfd_create resumed>) = 6 [pid 634] <... memfd_create resumed>) = 3 [pid 633] <... memfd_create resumed>) = 6 [pid 408] close(3 [pid 636] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 634] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 633] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 408] <... close resumed>) = 0 [pid 636] <... mmap resumed>) = 0x7f6f98bca000 [pid 634] <... mmap resumed>) = 0x7f6f98ba9000 [pid 633] <... mmap resumed>) = 0x7f6f98bca000 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 638] <... open resumed>) = 4 [pid 636] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 630] <... mprotect resumed>) = 0 [pid 625] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 619] exit_group(0 [pid 630] clone(child_stack=0x7f6fa0fc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 642 [pid 638] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 625] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 626] <... futex resumed>) = ? [pid 619] <... exit_group resumed>) = ? [pid 625] <... futex resumed>) = ? [pid 638] <... futex resumed>) = 0 [pid 634] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 630] <... clone resumed>, parent_tid=[643], tls=0x7f6fa0fc9700, child_tidptr=0x7f6fa0fc99d0) = 643 [pid 626] +++ exited with 0 +++ [pid 625] +++ exited with 0 +++ [pid 638] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 633] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 630] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 630] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 634] <... write resumed>) = 1048576 [pid 634] munmap(0x7f6f98ba9000, 1048576) = 0 ./strace-static-x86_64: Process 643 attached ./strace-static-x86_64: Process 642 attached [pid 634] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 623] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 634] <... openat resumed>) = 5 [pid 623] ioctl(6, LOOP_CLR_FD [pid 634] ioctl(5, LOOP_SET_FD, 3 [pid 642] set_robust_list(0x5555564066e0, 24 [pid 634] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 642] <... set_robust_list resumed>) = 0 [pid 634] ioctl(5, LOOP_CLR_FD) = 0 [pid 642] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 636] <... write resumed>) = 1048576 [pid 636] munmap(0x7f6f98bca000, 1048576) = 0 [pid 636] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 7 [pid 642] <... prctl resumed>) = 0 [pid 642] setpgid(0, 0) = 0 [pid 636] ioctl(7, LOOP_SET_FD, 6 [pid 643] set_robust_list(0x7f6fa0fc99e0, 24 [ 20.913509][ T623] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 20.927614][ T625] EXT4-fs (loop3): get root inode failed [ 20.927969][ T632] EXT4-fs warning (device loop3): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 20.933057][ T625] EXT4-fs (loop3): mount failed [ 20.935799][ T623] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 642] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 633] <... write resumed>) = 1048576 [pid 642] <... openat resumed>) = 3 [pid 634] ioctl(5, LOOP_SET_FD, 3 [pid 642] write(3, "1000", 4 [pid 634] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 642] <... write resumed>) = 4 [pid 634] close(5 [pid 642] close(3 [pid 634] <... close resumed>) = 0 [pid 642] <... close resumed>) = 0 [pid 634] close(3 [pid 642] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 634] <... close resumed>) = 0 [pid 643] <... set_robust_list resumed>) = 0 [pid 642] <... futex resumed>) = 0 [pid 634] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 633] munmap(0x7f6f98bca000, 1048576 [pid 643] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 642] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 636] <... ioctl resumed>) = 0 [pid 634] <... futex resumed>) = 0 [pid 619] +++ exited with 0 +++ [pid 636] close(6 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=619, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 636] <... close resumed>) = 0 [pid 636] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 636] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 410] <... openat resumed>) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = 0 [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 634] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 644 [pid 623] <... ioctl resumed>) = 0 [pid 642] <... mmap resumed>) = 0x7f6fa0feb000 ./strace-static-x86_64: Process 644 attached [pid 644] set_robust_list(0x5555564066e0, 24) = 0 [pid 644] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 644] setpgid(0, 0) = 0 [pid 623] close(6) = 0 [pid 644] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 642] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 623] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 623] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 642] <... mprotect resumed>) = 0 [pid 643] <... mount resumed>) = 0 [pid 615] exit_group(0 [pid 642] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 628] <... futex resumed>) = ? [pid 615] <... exit_group resumed>) = ? [pid 623] <... futex resumed>) = 56 [pid 628] +++ exited with 0 +++ [pid 643] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 633] <... munmap resumed>) = 0 [pid 643] <... futex resumed>) = 1 [pid 630] <... futex resumed>) = 0 [pid 643] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 634] <... futex resumed>) = 0 [pid 630] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 634] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 623] +++ exited with 0 +++ [pid 615] +++ exited with 0 +++ [pid 634] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=615, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 634] <... futex resumed>) = 1 [pid 630] <... futex resumed>) = 0 [pid 642] <... clone resumed>, parent_tid=[645], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 645 [pid 634] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 642] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 634] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 630] <... futex resumed>) = 0 [pid 634] openat(-1, "/proc/self/exe", O_RDONLY [pid 633] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 642] <... futex resumed>) = 0 [pid 630] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 633] <... openat resumed>) = 7 [pid 634] <... openat resumed>) = 5 [pid 642] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 633] ioctl(7, LOOP_SET_FD, 6./strace-static-x86_64: Process 645 attached [pid 644] <... openat resumed>) = 3 [pid 642] <... futex resumed>) = 0 [pid 634] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 633] <... ioctl resumed>) = 0 [pid 645] set_robust_list(0x7f6fa100b9e0, 24 [pid 644] write(3, "1000", 4 [pid 642] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 634] <... futex resumed>) = 1 [pid 630] <... futex resumed>) = 0 [pid 645] <... set_robust_list resumed>) = 0 [pid 644] <... write resumed>) = 4 [pid 642] <... mmap resumed>) = 0x7f6fa0fca000 [pid 634] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 645] memfd_create("syzkaller", 0 [pid 644] close(3 [pid 642] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 634] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 630] <... futex resumed>) = 0 [pid 645] <... memfd_create resumed>) = 3 [pid 644] <... close resumed>) = 0 [pid 642] <... mprotect resumed>) = 0 [pid 634] sendfile(3, 5, NULL, 140737974943952 [pid 630] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 645] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 644] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 642] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 633] close(6 [pid 645] <... mmap resumed>) = 0x7f6f98bca000 [pid 644] <... futex resumed>) = 0 [pid 634] <... sendfile resumed>) = 1048576 [pid 633] <... close resumed>) = 0 [pid 645] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 644] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 642] <... clone resumed>, parent_tid=[647], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 647 [pid 634] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 633] mkdir("./bus", 0777 [pid 645] <... write resumed>) = 1048576 [pid 644] <... mmap resumed>) = 0x7f6fa0feb000 [pid 642] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 634] <... futex resumed>) = 1 [pid 633] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 630] <... futex resumed>) = 0 [pid 645] munmap(0x7f6f98bca000, 1048576 [pid 644] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 642] <... futex resumed>) = 0 [pid 634] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 633] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 630] exit_group(0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 645] <... munmap resumed>) = 0 [pid 644] <... mprotect resumed>) = 0 [pid 642] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 638] <... futex resumed>) = ? [pid 634] <... futex resumed>) = ? [pid 630] <... exit_group resumed>) = ? [pid 411] <... openat resumed>) = 3 [pid 645] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 644] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 638] +++ exited with 0 +++ [pid 634] +++ exited with 0 +++ [pid 411] ioctl(3, LOOP_CLR_FD [pid 645] <... openat resumed>) = 4 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [ 20.979781][ T636] loop0: detected capacity change from 0 to 2048 [ 20.999116][ T633] loop2: detected capacity change from 0 to 2048 [pid 645] ioctl(4, LOOP_SET_FD, 3 [pid 644] <... clone resumed>, parent_tid=[648], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 648 ./strace-static-x86_64: Process 648 attached ./strace-static-x86_64: Process 647 attached [pid 643] <... futex resumed>) = ? [pid 411] close(3 [pid 648] set_robust_list(0x7f6fa100b9e0, 24 [pid 647] set_robust_list(0x7f6fa0fea9e0, 24 [pid 645] <... ioctl resumed>) = 0 [pid 644] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 645] close(3 [pid 644] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 645] <... close resumed>) = 0 [pid 644] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 645] mkdir("./bus", 0777 [pid 644] <... futex resumed>) = 0 [pid 645] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 644] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 645] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 644] <... mmap resumed>) = 0x7f6fa0fca000 [pid 644] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 644] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[652], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 652 [pid 644] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 21.032605][ T645] loop1: detected capacity change from 0 to 2048 [ 21.041154][ T633] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.042007][ T636] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.060840][ T633] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 644] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 652 attached [pid 648] <... set_robust_list resumed>) = 0 [pid 647] <... set_robust_list resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 652] set_robust_list(0x7f6fa0fea9e0, 24 [pid 642] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 648] memfd_create("syzkaller", 0 [pid 647] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 642] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 652] <... set_robust_list resumed>) = 0 [pid 652] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 648] <... memfd_create resumed>) = 3 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 653 ./strace-static-x86_64: Process 653 attached [pid 648] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 653] set_robust_list(0x5555564066e0, 24 [pid 648] <... mmap resumed>) = 0x7f6f98bca000 [pid 653] <... set_robust_list resumed>) = 0 [pid 642] <... futex resumed>) = 0 [pid 642] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6f98ca9000 [pid 642] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 642] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[654], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 654 [pid 642] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 642] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 648] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 653] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 653] setpgid(0, 0) = 0 [pid 653] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 653] write(3, "1000", 4) = 4 [pid 653] close(3) = 0 [pid 653] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 653] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 653] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 653] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[655], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 655 [pid 653] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 653] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 653] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 653] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 653] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[656], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 656 [pid 653] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 653] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 654 attached [pid 654] set_robust_list(0x7f6f98cc99e0, 24) = 0 [pid 648] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 655 attached ./strace-static-x86_64: Process 656 attached [pid 648] munmap(0x7f6f98bca000, 1048576 [pid 633] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 654] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 636] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 636] ioctl(7, LOOP_CLR_FD) = 0 [pid 636] close(7) = 0 [pid 648] <... munmap resumed>) = 0 [pid 633] ioctl(7, LOOP_CLR_FD [pid 656] set_robust_list(0x7f6fa0fea9e0, 24 [pid 655] set_robust_list(0x7f6fa100b9e0, 24 [pid 636] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 636] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 631] exit_group(0) = ? [pid 648] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 633] <... ioctl resumed>) = 0 [pid 656] <... set_robust_list resumed>) = 0 [pid 655] <... set_robust_list resumed>) = 0 [pid 639] <... futex resumed>) = ? [pid 639] +++ exited with 0 +++ [pid 636] <... futex resumed>) = ? [pid 656] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 655] memfd_create("syzkaller", 0 [pid 648] <... openat resumed>) = 5 [pid 633] close(7 [pid 654] <... mount resumed>) = 0 [pid 654] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 642] <... futex resumed>) = 0 [pid 642] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 642] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 654] <... futex resumed>) = 1 [pid 648] ioctl(5, LOOP_SET_FD, 3 [pid 633] <... close resumed>) = 0 [pid 655] <... memfd_create resumed>) = 3 [pid 654] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 655] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 648] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 633] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 654] <... open resumed>) = 5 [pid 655] <... mmap resumed>) = 0x7f6f98bca000 [pid 654] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 648] ioctl(5, LOOP_CLR_FD [pid 633] <... futex resumed>) = 0 [pid 642] <... futex resumed>) = 0 [pid 642] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 642] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 654] <... futex resumed>) = 1 [pid 629] exit_group(0 [pid 654] openat(-1, "/proc/self/exe", O_RDONLY [pid 637] <... futex resumed>) = ? [pid 629] <... exit_group resumed>) = ? [pid 648] <... ioctl resumed>) = 0 [pid 637] +++ exited with 0 +++ [pid 654] <... openat resumed>) = 6 [pid 654] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 642] <... futex resumed>) = 0 [pid 642] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 642] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 654] <... futex resumed>) = 1 [pid 654] sendfile(5, 6, NULL, 140737974943952 [pid 633] +++ exited with 0 +++ [pid 629] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=629, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 409] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 648] ioctl(5, LOOP_SET_FD, 3 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 648] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 658 [pid 648] close(5 [pid 656] <... open resumed>) = 4 [pid 656] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 653] <... futex resumed>) = 0 [pid 653] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 653] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 656] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 656] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 653] <... futex resumed>) = 0 [ 21.068782][ T636] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 653] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 656] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 655] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 653] <... futex resumed>) = 0 [pid 652] <... open resumed>) = 4 [pid 647] <... open resumed>) = 3 [pid 644] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 643] +++ exited with 0 +++ [pid 630] +++ exited with 0 +++ [pid 644] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 644] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6f98ca9000 [pid 644] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 644] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[660], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 660 [pid 644] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 644] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 654] <... sendfile resumed>) = 1048576 [pid 654] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 642] <... futex resumed>) = 0 [pid 654] <... futex resumed>) = 1 [pid 654] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 658 attached [pid 658] set_robust_list(0x5555564066e0, 24) = 0 [pid 658] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 658] setpgid(0, 0) = 0 [pid 658] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 658] write(3, "1000", 4) = 4 [pid 658] close(3) = 0 [pid 658] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 660 attached [pid 658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 660] set_robust_list(0x7f6f98cc99e0, 24) = 0 [pid 660] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 658] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 660] <... mount resumed>) = 0 [pid 658] <... mprotect resumed>) = 0 [pid 658] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 660] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 644] <... futex resumed>) = 0 [pid 644] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 644] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 660] <... futex resumed>) = 1 [pid 660] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 653] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 652] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 647] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=630, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 652] <... futex resumed>) = 0 [pid 647] <... futex resumed>) = 0 [pid 658] <... clone resumed>, parent_tid=[661], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 661 [pid 658] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 658] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 652] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 647] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 658] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 658] <... mprotect resumed>) = 0 [pid 658] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 658] <... clone resumed>, parent_tid=[662], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 662 [pid 412] close(3 [pid 658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 412] <... close resumed>) = 0 [pid 658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 661 attached [pid 661] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 661] memfd_create("syzkaller", 0) = 3 [pid 661] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 663 [pid 655] <... write resumed>) = 1048576 [pid 661] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 655] munmap(0x7f6f98bca000, 1048576) = 0 [pid 655] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 6 [pid 655] ioctl(6, LOOP_SET_FD, 3./strace-static-x86_64: Process 663 attached ./strace-static-x86_64: Process 662 attached [pid 661] <... write resumed>) = 1048576 [pid 645] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 645] ioctl(4, LOOP_CLR_FD) = 0 [pid 645] close(4) = 0 [pid 645] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 645] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 663] set_robust_list(0x5555564066e0, 24) = 0 [pid 663] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 663] setpgid(0, 0) = 0 [pid 663] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 642] exit_group(0 [pid 647] <... futex resumed>) = ? [pid 642] <... exit_group resumed>) = ? [pid 647] +++ exited with 0 +++ [pid 645] <... futex resumed>) = ? [pid 645] +++ exited with 0 +++ [pid 663] <... openat resumed>) = 3 [pid 663] write(3, "1000", 4) = 4 [pid 663] close(3) = 0 [pid 663] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 663] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 663] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 663] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[664], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 664 [pid 648] <... close resumed>) = 0 [pid 660] <... open resumed>) = 5 [pid 656] <... open resumed>) = 5 [pid 654] <... futex resumed>) = ? [pid 656] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 653] <... futex resumed>) = 0 [pid 656] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 653] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 656] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 653] <... futex resumed>) = 0 [pid 656] openat(-1, "/proc/self/exe", O_RDONLY [pid 653] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 656] <... openat resumed>) = 7 [pid 656] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 653] <... futex resumed>) = 0 [pid 656] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 653] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 656] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 653] <... futex resumed>) = 0 [pid 656] sendfile(5, 7, NULL, 140737974943952 [pid 653] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 656] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 656] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 653] <... futex resumed>) = 0 [pid 656] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 663] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 654] +++ exited with 0 +++ [pid 642] +++ exited with 0 +++ [pid 660] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=642, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 663] <... futex resumed>) = 0 [pid 663] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 663] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 663] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 663] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 660] <... futex resumed>) = 1 [pid 648] close(3 [pid 644] <... futex resumed>) = 0 [pid 663] <... clone resumed>, parent_tid=[665], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 665 [pid 663] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 660] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 644] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... restart_syscall resumed>) = 0 [pid 663] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD [pid 662] set_robust_list(0x7f6fa0fea9e0, 24 [pid 408] <... ioctl resumed>) = 0 [pid 662] <... set_robust_list resumed>) = 0 [pid 408] close(3 [pid 662] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 408] <... close resumed>) = 0 [pid 662] <... open resumed>) = 4 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 652] <... futex resumed>) = 0 [pid 648] <... close resumed>) = 0 [pid 644] <... futex resumed>) = 1 [pid 662] <... futex resumed>) = 1 [pid 658] <... futex resumed>) = 0 [pid 652] openat(-1, "/proc/self/exe", O_RDONLY [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 666 [pid 662] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 652] <... openat resumed>) = 3 [pid 644] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 648] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 662] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 652] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 662] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 658] <... futex resumed>) = 0 [pid 652] <... futex resumed>) = 0 [pid 648] <... futex resumed>) = 0 [pid 644] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 655] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 664 attached [pid 662] <... mount resumed>) = 0 [pid 658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 652] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 662] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 661] munmap(0x7f6f98bca000, 1048576./strace-static-x86_64: Process 665 attached ) = 0 [pid 658] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 655] close(3 [pid 648] sendfile(5, 3, NULL, 140737974943952 [pid 664] set_robust_list(0x7f6fa100b9e0, 24 [pid 644] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 661] openat(AT_FDCWD, "/dev/loop2", O_RDWR./strace-static-x86_64: Process 666 attached [pid 666] set_robust_list(0x5555564066e0, 24) = 0 [pid 666] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 665] set_robust_list(0x7f6fa0fea9e0, 24 [pid 664] <... set_robust_list resumed>) = 0 [pid 658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 655] <... close resumed>) = 0 [pid 648] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 644] <... futex resumed>) = 0 [pid 666] <... prctl resumed>) = 0 [pid 666] setpgid(0, 0 [pid 664] memfd_create("syzkaller", 0 [pid 662] <... futex resumed>) = 0 [pid 665] <... set_robust_list resumed>) = 0 [pid 658] <... futex resumed>) = 1 [pid 655] mkdir("./bus", 0777 [pid 648] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 644] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 666] <... setpgid resumed>) = 0 [pid 662] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 666] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 655] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 648] <... futex resumed>) = 0 [pid 644] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 664] <... memfd_create resumed>) = 3 [pid 665] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 666] <... openat resumed>) = 3 [pid 666] write(3, "1000", 4) = 4 [pid 648] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 644] exit_group(0 [pid 666] close(3) = 0 [pid 666] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 666] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 666] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 660] <... futex resumed>) = ? [pid 655] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 652] <... futex resumed>) = ? [pid 648] <... futex resumed>) = ? [pid 644] <... exit_group resumed>) = ? [pid 666] <... mprotect resumed>) = 0 [pid 666] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 660] +++ exited with 0 +++ [pid 652] +++ exited with 0 +++ [pid 648] +++ exited with 0 +++ [pid 666] <... clone resumed>, parent_tid=[667], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 667 [pid 666] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 644] +++ exited with 0 +++ [pid 666] <... futex resumed>) = 0 [pid 666] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=644, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 666] <... futex resumed>) = 0 [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 666] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 666] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 666] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[668], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 668 [pid 666] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 666] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 668 attached [pid 668] set_robust_list(0x7f6fa0fea9e0, 24 [pid 410] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 667 attached [pid 664] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 664] <... mmap resumed>) = 0x7f6f98bca000 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 669 [pid 668] <... set_robust_list resumed>) = 0 [pid 668] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 667] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 667] memfd_create("syzkaller", 0) = 4 [pid 667] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 664] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 664] munmap(0x7f6f98bca000, 1048576) = 0 ./strace-static-x86_64: Process 669 attached [pid 664] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 667] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 636] +++ exited with 0 +++ [pid 631] +++ exited with 0 +++ [pid 662] <... open resumed>) = 6 [pid 661] <... openat resumed>) = 5 [pid 665] <... open resumed>) = 4 [pid 662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 661] ioctl(5, LOOP_SET_FD, 3 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=631, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [ 21.110020][ T657] EXT4-fs warning (device loop1): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 21.121271][ T645] EXT4-fs (loop1): get root inode failed [ 21.135055][ T645] EXT4-fs (loop1): mount failed [ 21.138760][ T655] loop4: detected capacity change from 0 to 2048 [pid 665] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 669] set_robust_list(0x5555564066e0, 24 [pid 667] <... write resumed>) = 1048576 [pid 665] <... futex resumed>) = 1 [pid 664] <... openat resumed>) = 5 [pid 662] <... futex resumed>) = 1 [pid 658] <... futex resumed>) = 0 [pid 665] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 664] ioctl(5, LOOP_SET_FD, 3 [pid 658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 663] <... futex resumed>) = 0 [pid 662] openat(-1, "/proc/self/exe", O_RDONLY [pid 658] <... futex resumed>) = 0 [pid 658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 669] <... set_robust_list resumed>) = 0 [pid 669] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 669] setpgid(0, 0) = 0 [pid 669] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 669] write(3, "1000", 4) = 4 [pid 669] close(3) = 0 [pid 669] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 669] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 669] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 669] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[672], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 672 [pid 669] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 669] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 669] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 669] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 669] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[673], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 673 [pid 669] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 669] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 667] munmap(0x7f6f98bca000, 1048576) = 0 [pid 667] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 5 [pid 667] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 667] ioctl(5, LOOP_CLR_FD) = 0 [pid 664] <... ioctl resumed>) = 0 [pid 664] close(3) = 0 [pid 664] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 667] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 667] close(5) = 0 [pid 667] close(4 [pid 664] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 663] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 662] <... openat resumed>) = 7 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 663] <... futex resumed>) = 1 [pid 665] <... futex resumed>) = 0 [pid 663] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 665] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 407] <... openat resumed>) = 3 [pid 662] <... futex resumed>) = 1 [pid 658] <... futex resumed>) = 0 [pid 665] <... mount resumed>) = 0 [pid 662] sendfile(6, 7, NULL, 140737974943952 [pid 658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] ioctl(3, LOOP_CLR_FD [pid 665] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 668] <... open resumed>) = 3 [pid 668] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 668] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 661] <... ioctl resumed>) = 0 [pid 661] close(3) = 0 [pid 661] mkdir("./bus", 0777) = -1 EEXIST (File exists) [ 21.172299][ T661] loop2: detected capacity change from 0 to 2048 [ 21.180603][ T664] loop5: detected capacity change from 0 to 2048 [ 21.182318][ T655] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.202179][ T120] blk_update_request: I/O error, dev loop2, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [pid 661] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 662] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 666] <... futex resumed>) = 0 [pid 666] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 658] <... futex resumed>) = 0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 666] <... futex resumed>) = 1 [pid 666] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 665] <... futex resumed>) = 1 [pid 663] <... futex resumed>) = 0 [pid 662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 658] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] close(3 [pid 665] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 663] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 662] <... futex resumed>) = 0 [pid 665] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 663] <... futex resumed>) = 0 [pid 662] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 407] <... close resumed>) = 0 [pid 665] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 663] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 668] <... futex resumed>) = 0 [pid 665] <... open resumed>) = 3 [pid 665] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 675 [pid 665] <... futex resumed>) = 1 [pid 663] <... futex resumed>) = 0 [pid 665] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 663] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 665] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 663] <... futex resumed>) = 0 [pid 665] openat(-1, "/proc/self/exe", O_RDONLY [pid 663] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 668] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 665] <... openat resumed>) = 6 [pid 665] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 668] <... mount resumed>) = 0 [pid 667] <... close resumed>) = 0 [pid 665] <... futex resumed>) = 1 [pid 663] <... futex resumed>) = 0 [pid 667] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 665] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 663] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 667] <... futex resumed>) = 0 [pid 665] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 663] <... futex resumed>) = 0 [pid 665] sendfile(3, 6, NULL, 140737974943952 [pid 663] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 667] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 668] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 666] <... futex resumed>) = 0 [pid 668] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 666] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 667] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 666] <... futex resumed>) = 0 [pid 666] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 673 attached ./strace-static-x86_64: Process 672 attached [pid 667] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 675 attached [pid 675] set_robust_list(0x5555564066e0, 24) = 0 [pid 675] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 675] setpgid(0, 0) = 0 [pid 675] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 675] write(3, "1000", 4) = 4 [pid 675] close(3) = 0 [pid 675] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 675] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 675] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 675] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[677], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 677 [pid 673] set_robust_list(0x7f6fa0fea9e0, 24 [pid 672] set_robust_list(0x7f6fa100b9e0, 24 [pid 667] <... open resumed>) = 4 [pid 675] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 675] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 673] <... set_robust_list resumed>) = 0 [pid 672] <... set_robust_list resumed>) = 0 [pid 673] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 669] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 667] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 672] memfd_create("syzkaller", 0 [pid 669] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 673] <... open resumed>) = 3 [pid 669] <... futex resumed>) = 0 [pid 672] <... memfd_create resumed>) = 4 [pid 667] <... futex resumed>) = 1 [pid 666] <... futex resumed>) = 0 [pid 669] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 666] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 669] <... mmap resumed>) = 0x7f6fa0fa9000 [pid 666] <... futex resumed>) = 0 [pid 669] mprotect(0x7f6fa0faa000, 131072, PROT_READ|PROT_WRITE [pid 666] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 672] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 669] <... mprotect resumed>) = 0 [pid 667] openat(-1, "/proc/self/exe", O_RDONLY [pid 673] <... futex resumed>) = 0 [pid 672] <... mmap resumed>) = 0x7f6f98ba9000 [pid 669] clone(child_stack=0x7f6fa0fc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 673] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 667] <... openat resumed>) = 5 [pid 669] <... clone resumed>, parent_tid=[679], tls=0x7f6fa0fc9700, child_tidptr=0x7f6fa0fc99d0) = 679 [pid 669] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 669] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 675] <... futex resumed>) = 0 [pid 675] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 675] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 675] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 672] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 667] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 666] <... futex resumed>) = 0 [pid 667] sendfile(4, 5, NULL, 140737974943952 [pid 666] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 666] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 675] <... clone resumed>, parent_tid=[680], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 680 [pid 665] <... sendfile resumed>) = 1048576 [pid 665] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 663] <... futex resumed>) = 0 [pid 665] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 667] <... sendfile resumed>) = 1048576 [pid 667] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 672] <... write resumed>) = 1048576 [pid 667] <... futex resumed>) = 1 [pid 666] <... futex resumed>) = 0 ./strace-static-x86_64: Process 677 attached [pid 675] <... futex resumed>) = 0 [pid 666] exit_group(0 [pid 675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 668] <... futex resumed>) = ? [pid 666] <... exit_group resumed>) = ? [pid 668] +++ exited with 0 +++ ./strace-static-x86_64: Process 679 attached [pid 679] set_robust_list(0x7f6fa0fc99e0, 24) = 0 [pid 679] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 679] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 669] <... futex resumed>) = 0 [pid 669] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 673] <... futex resumed>) = 0 [pid 669] <... futex resumed>) = 1 [pid 673] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 669] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 679] <... futex resumed>) = 1 [pid 673] <... open resumed>) = 5 [pid 679] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 669] <... futex resumed>) = 0 ./strace-static-x86_64: Process 680 attached [pid 673] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 669] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 680] set_robust_list(0x7f6fa0fea9e0, 24 [pid 673] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 669] <... futex resumed>) = 0 [pid 680] <... set_robust_list resumed>) = 0 [ 21.213423][ T120] blk_update_request: I/O error, dev loop2, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 21.233950][ T655] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.260256][ T678] EXT4-fs warning (device loop5): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [pid 673] openat(-1, "/proc/self/exe", O_RDONLY [pid 672] munmap(0x7f6f98ba9000, 1048576 [pid 669] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 655] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 680] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 673] <... openat resumed>) = 6 [pid 655] ioctl(6, LOOP_CLR_FD [pid 680] <... open resumed>) = 3 [pid 677] set_robust_list(0x7f6fa100b9e0, 24 [pid 673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 672] <... munmap resumed>) = 0 [pid 667] +++ exited with 0 +++ [pid 666] +++ exited with 0 +++ [pid 680] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 673] <... futex resumed>) = 1 [pid 669] <... futex resumed>) = 0 [pid 680] <... futex resumed>) = 1 [pid 677] <... set_robust_list resumed>) = 0 [pid 675] <... futex resumed>) = 0 [pid 673] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 672] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 669] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 664] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=666, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 680] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 677] memfd_create("syzkaller", 0 [pid 675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 673] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 672] <... openat resumed>) = 7 [pid 669] <... futex resumed>) = 0 [pid 664] ioctl(5, LOOP_CLR_FD [pid 680] <... mount resumed>) = 0 [pid 677] <... memfd_create resumed>) = 4 [pid 675] <... futex resumed>) = 0 [pid 673] sendfile(5, 6, NULL, 140737974943952 [pid 672] ioctl(7, LOOP_SET_FD, 4 [pid 669] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 664] <... ioctl resumed>) = 0 [pid 680] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 677] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 673] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 680] <... futex resumed>) = 0 [pid 675] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 680] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 673] <... futex resumed>) = 1 [pid 669] <... futex resumed>) = 0 [pid 680] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 675] <... futex resumed>) = 0 [pid 673] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 680] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 680] <... open resumed>) = 5 [pid 680] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 675] <... futex resumed>) = 0 [pid 680] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 680] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 675] <... futex resumed>) = 0 [pid 680] openat(-1, "/proc/self/exe", O_RDONLY [pid 675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 680] <... openat resumed>) = 6 [pid 680] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 675] <... futex resumed>) = 0 [pid 680] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 680] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 677] <... mmap resumed>) = 0x7f6f98bca000 [ 21.271372][ T664] EXT4-fs (loop5): get root inode failed [ 21.278088][ T664] EXT4-fs (loop5): mount failed [ 21.281585][ T661] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.300234][ T672] loop3: detected capacity change from 0 to 2048 [pid 675] <... futex resumed>) = 0 [pid 664] close(5 [pid 680] sendfile(5, 6, NULL, 140737974943952 [pid 677] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 672] <... ioctl resumed>) = 0 [pid 664] <... close resumed>) = 0 [pid 677] <... write resumed>) = 1048576 [pid 664] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 677] munmap(0x7f6f98bca000, 1048576 [pid 664] <... futex resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 677] <... munmap resumed>) = 0 [pid 664] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] <... openat resumed>) = 3 [pid 677] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 408] ioctl(3, LOOP_CLR_FD [pid 677] <... openat resumed>) = 7 [pid 408] <... ioctl resumed>) = 0 [pid 677] ioctl(7, LOOP_SET_FD, 4 [pid 408] close(3 [pid 680] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 672] close(4 [pid 663] exit_group(0 [pid 655] <... ioctl resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 680] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 675] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 672] <... close resumed>) = 0 [pid 665] <... futex resumed>) = ? [pid 664] <... futex resumed>) = ? [pid 663] <... exit_group resumed>) = ? [pid 655] close(6 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 680] <... futex resumed>) = 0 [pid 672] mkdir("./bus", 0777 [pid 665] +++ exited with 0 +++ [pid 664] +++ exited with 0 +++ [pid 655] <... close resumed>) = 0 [pid 680] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 672] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 655] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 653] exit_group(0 [pid 672] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 656] <... futex resumed>) = ? [pid 655] <... futex resumed>) = ? [pid 653] <... exit_group resumed>) = ? [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 683 [pid 656] +++ exited with 0 +++ [pid 655] +++ exited with 0 +++ [pid 653] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=653, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- ./strace-static-x86_64: Process 683 attached [pid 683] set_robust_list(0x5555564066e0, 24) = 0 [pid 683] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 677] <... ioctl resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 683] setpgid(0, 0 [pid 411] <... openat resumed>) = 3 [pid 683] <... setpgid resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 683] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 683] <... openat resumed>) = 3 [pid 411] close(3 [pid 683] write(3, "1000", 4 [pid 677] close(4 [pid 411] <... close resumed>) = 0 [pid 677] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 677] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 661] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 677] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 685 ./strace-static-x86_64: Process 685 attached [pid 683] <... write resumed>) = 4 [pid 661] ioctl(5, LOOP_CLR_FD) = 0 [pid 661] close(5) = 0 [pid 661] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 661] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 685] set_robust_list(0x5555564066e0, 24) = 0 [pid 685] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 685] setpgid(0, 0) = 0 [pid 685] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 685] write(3, "1000", 4) = 4 [pid 685] close(3) = 0 [pid 685] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 685] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 685] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 685] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[687], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 687 [pid 685] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 685] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 685] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 685] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 685] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[688], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 688 [pid 685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 687 attached [pid 687] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 687] memfd_create("syzkaller", 0) = 3 [pid 687] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 688 attached [pid 688] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 688] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 688] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 685] <... futex resumed>) = 0 [pid 685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 688] <... futex resumed>) = 1 [pid 688] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 688] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 685] <... futex resumed>) = 0 [pid 685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 688] <... futex resumed>) = 1 [pid 688] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 688] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 685] <... futex resumed>) = 0 [pid 685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 688] <... futex resumed>) = 1 [pid 683] close(3 [ 21.317450][ T661] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.324486][ T677] loop0: detected capacity change from 0 to 2048 [ 21.358003][ T672] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 658] exit_group(0 [pid 688] openat(-1, "/proc/self/exe", O_RDONLY [pid 687] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 683] <... close resumed>) = 0 [pid 663] +++ exited with 0 +++ [pid 662] <... futex resumed>) = ? [pid 661] <... futex resumed>) = ? [pid 658] <... exit_group resumed>) = ? [pid 688] <... openat resumed>) = 6 [pid 683] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 662] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=663, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 688] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 683] <... futex resumed>) = 0 [pid 688] <... futex resumed>) = 1 [pid 685] <... futex resumed>) = 0 [pid 683] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 688] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 683] <... mmap resumed>) = 0x7f6fa0feb000 [pid 683] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 683] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 683] <... clone resumed>, parent_tid=[690], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 690 [pid 683] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 688] <... futex resumed>) = 0 [pid 685] <... futex resumed>) = 1 [pid 683] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 672] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 412] <... openat resumed>) = 3 [pid 688] sendfile(5, 6, NULL, 140737974943952 [pid 683] <... futex resumed>) = 0 [pid 672] ioctl(7, LOOP_CLR_FD [pid 412] ioctl(3, LOOP_CLR_FD [pid 688] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 687] <... write resumed>) = 1048576 [pid 685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 683] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 672] <... ioctl resumed>) = 0 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 688] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 683] <... mmap resumed>) = 0x7f6fa0fca000 [pid 672] close(7 [pid 412] close(3 [pid 688] <... futex resumed>) = 1 [pid 685] <... futex resumed>) = 0 [pid 683] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 672] <... close resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 688] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 683] <... mprotect resumed>) = 0 [pid 672] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 683] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 672] <... futex resumed>) = 0 [pid 672] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 691 [pid 683] <... clone resumed>, parent_tid=[692], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 692 [pid 669] exit_group(0 [pid 683] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 679] <... futex resumed>) = ? [pid 673] <... futex resumed>) = ? [pid 672] <... futex resumed>) = ? [pid 669] <... exit_group resumed>) = ? [pid 683] <... futex resumed>) = 0 [pid 679] +++ exited with 0 +++ [pid 673] +++ exited with 0 +++ [pid 672] +++ exited with 0 +++ [pid 683] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 687] munmap(0x7f6f98bca000, 1048576) = 0 [pid 687] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 7 [pid 687] ioctl(7, LOOP_SET_FD, 3./strace-static-x86_64: Process 692 attached ./strace-static-x86_64: Process 691 attached ./strace-static-x86_64: Process 690 attached [pid 692] set_robust_list(0x7f6fa0fea9e0, 24 [pid 690] set_robust_list(0x7f6fa100b9e0, 24 [pid 692] <... set_robust_list resumed>) = 0 [pid 690] <... set_robust_list resumed>) = 0 [pid 692] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 690] memfd_create("syzkaller", 0) = 4 [pid 690] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 691] set_robust_list(0x5555564066e0, 24 [pid 687] <... ioctl resumed>) = 0 [pid 691] <... set_robust_list resumed>) = 0 [pid 687] close(3 [pid 691] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 687] <... close resumed>) = 0 [pid 691] <... prctl resumed>) = 0 [pid 687] mkdir("./bus", 0777 [pid 691] setpgid(0, 0 [pid 687] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 691] <... setpgid resumed>) = 0 [pid 687] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 691] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 691] write(3, "1000", 4) = 4 [pid 691] close(3) = 0 [pid 691] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 691] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 691] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 691] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[694], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 694 [pid 691] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 691] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 691] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 691] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 691] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[695], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 695 [pid 691] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 691] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 695 attached [pid 695] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 695] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 690] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 690] munmap(0x7f6f98bca000, 1048576) = 0 [pid 690] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 695] <... open resumed>) = 3 [pid 695] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 691] <... futex resumed>) = 0 [pid 691] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 691] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 695] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 695] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 691] <... futex resumed>) = 0 [pid 691] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 691] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 695] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 695] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 691] <... futex resumed>) = 0 [pid 691] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 691] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 695] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 695] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 691] <... futex resumed>) = 0 [pid 691] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 691] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 695] sendfile(4, 5, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 695] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 691] <... futex resumed>) = 0 [pid 695] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 692] <... open resumed>) = 3 [pid 692] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 683] <... futex resumed>) = 0 [pid 683] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 683] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 692] <... futex resumed>) = 1 [pid 692] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 692] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 683] <... futex resumed>) = 0 [pid 683] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 683] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 692] <... futex resumed>) = 1 [pid 692] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 694 attached [pid 694] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 694] memfd_create("syzkaller", 0) = 6 [pid 694] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [ 21.375095][ T672] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.397677][ T687] loop4: detected capacity change from 0 to 2048 [ 21.405308][ T677] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 694] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 677] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 694] <... write resumed>) = 1048576 [pid 694] munmap(0x7f6f98bca000, 1048576) = 0 [pid 694] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 694] ioctl(7, LOOP_SET_FD, 6 [pid 677] ioctl(7, LOOP_CLR_FD [pid 692] <... open resumed>) = 6 [pid 690] <... openat resumed>) = 5 [pid 669] +++ exited with 0 +++ [pid 692] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 690] ioctl(5, LOOP_SET_FD, 4 [pid 692] <... futex resumed>) = 1 [pid 683] <... futex resumed>) = 0 [pid 677] <... ioctl resumed>) = 0 [pid 661] +++ exited with 0 +++ [pid 658] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=669, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 692] openat(-1, "/proc/self/exe", O_RDONLY [pid 683] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 692] <... openat resumed>) = 7 [pid 683] <... futex resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=658, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 692] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 683] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] ioctl(3, LOOP_CLR_FD [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 692] <... futex resumed>) = 0 [pid 683] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 410] <... ioctl resumed>) = 0 [pid 409] <... restart_syscall resumed>) = 0 [pid 692] sendfile(6, 7, NULL, 140737974943952 [pid 683] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] close(3 [pid 692] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 683] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 692] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 683] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 692] <... futex resumed>) = 0 [pid 683] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 409] <... openat resumed>) = 3 [pid 692] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 698 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 677] close(7 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 677] <... close resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 699 ./strace-static-x86_64: Process 698 attached ./strace-static-x86_64: Process 699 attached [pid 677] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 677] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 675] exit_group(0 [pid 687] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 680] <... futex resumed>) = ? [pid 677] <... futex resumed>) = ? [pid 675] <... exit_group resumed>) = ? [pid 680] +++ exited with 0 +++ [pid 699] set_robust_list(0x5555564066e0, 24 [pid 698] set_robust_list(0x5555564066e0, 24 [pid 699] <... set_robust_list resumed>) = 0 [pid 698] <... set_robust_list resumed>) = 0 [pid 699] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 698] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 698] setpgid(0, 0 [pid 687] ioctl(7, LOOP_CLR_FD [pid 694] <... ioctl resumed>) = 0 [pid 699] <... prctl resumed>) = 0 [pid 699] setpgid(0, 0 [pid 698] <... setpgid resumed>) = 0 [pid 699] <... setpgid resumed>) = 0 [pid 687] <... ioctl resumed>) = 0 [pid 698] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 699] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 687] close(7 [pid 694] close(6 [pid 687] <... close resumed>) = 0 [pid 687] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 699] <... openat resumed>) = 3 [pid 685] exit_group(0 [pid 688] <... futex resumed>) = ? [pid 685] <... exit_group resumed>) = ? [pid 688] +++ exited with 0 +++ [pid 699] write(3, "1000", 4) = 4 [pid 694] <... close resumed>) = 0 [pid 687] <... futex resumed>) = ? [pid 699] close(3) = 0 [pid 699] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 694] mkdir("./bus", 0777 [pid 690] <... ioctl resumed>) = 0 [pid 699] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 698] <... openat resumed>) = 3 [pid 694] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 690] close(4 [pid 699] <... mmap resumed>) = 0x7f6fa0feb000 [pid 698] write(3, "1000", 4 [pid 694] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 690] <... close resumed>) = 0 [pid 699] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 699] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[700], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 700 [pid 699] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 699] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 699] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 699] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 699] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 690] mkdir("./bus", 0777./strace-static-x86_64: Process 701 attached [pid 698] <... write resumed>) = 4 [pid 699] <... clone resumed>, parent_tid=[701], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 701 [pid 690] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 701] set_robust_list(0x7f6fa0fea9e0, 24 [pid 699] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 698] close(3 [pid 690] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 701] <... set_robust_list resumed>) = 0 [pid 699] <... futex resumed>) = 0 [pid 698] <... close resumed>) = 0 [pid 699] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 700 attached [pid 700] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 698] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 700] memfd_create("syzkaller", 0) = 3 [pid 698] <... futex resumed>) = 0 [pid 700] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 698] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 701] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 698] <... mmap resumed>) = 0x7f6fa0feb000 [pid 698] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 701] <... open resumed>) = 4 [pid 701] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 698] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 701] <... futex resumed>) = 1 [pid 699] <... futex resumed>) = 0 [pid 699] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 699] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 677] +++ exited with 0 +++ [pid 675] +++ exited with 0 +++ ./strace-static-x86_64: Process 702 attached [pid 702] set_robust_list(0x7f6fa100b9e0, 24 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=675, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 702] <... set_robust_list resumed>) = 0 [pid 702] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 698] <... clone resumed>, parent_tid=[702], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 702 [pid 698] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 701] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 698] <... futex resumed>) = 1 [pid 701] <... mount resumed>) = 0 [pid 702] <... futex resumed>) = 0 [pid 702] memfd_create("syzkaller", 0 [pid 698] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 701] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 698] <... futex resumed>) = 0 [pid 698] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 701] <... futex resumed>) = 1 [pid 699] <... futex resumed>) = 0 [pid 698] <... mmap resumed>) = 0x7f6fa0fca000 [pid 699] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 698] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 701] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 699] <... futex resumed>) = 0 [pid 699] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 698] <... mprotect resumed>) = 0 [pid 702] <... memfd_create resumed>) = 3 [pid 701] <... open resumed>) = 5 [pid 698] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 702] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 707 attached [pid 701] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 698] <... clone resumed>, parent_tid=[707], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 707 [pid 701] <... futex resumed>) = 1 [pid 707] set_robust_list(0x7f6fa0fea9e0, 24 [pid 699] <... futex resumed>) = 0 [pid 698] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 699] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 698] <... futex resumed>) = 0 [pid 701] openat(-1, "/proc/self/exe", O_RDONLY [pid 707] <... set_robust_list resumed>) = 0 [ 21.419340][ T677] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.431123][ T687] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.437115][ T694] loop5: detected capacity change from 0 to 2048 [ 21.444599][ T687] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.454295][ T690] loop1: detected capacity change from 0 to 2048 [pid 707] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 701] <... openat resumed>) = 6 [pid 699] <... futex resumed>) = 0 [pid 698] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 700] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 700] munmap(0x7f6f98bca000, 1048576) = 0 [pid 702] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 700] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 7 [pid 700] ioctl(7, LOOP_SET_FD, 3 [pid 701] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 699] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 702] <... write resumed>) = 1048576 [pid 702] munmap(0x7f6f98bca000, 1048576) = 0 [pid 702] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 5 [pid 702] ioctl(5, LOOP_SET_FD, 3 [pid 701] <... futex resumed>) = 0 [pid 699] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 687] +++ exited with 0 +++ [pid 685] +++ exited with 0 +++ [pid 407] <... openat resumed>) = 3 [pid 701] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 699] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=685, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 701] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 699] <... futex resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 701] sendfile(5, 6, NULL, 140737974943952 [pid 699] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 701] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 407] close(3 [pid 701] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... openat resumed>) = 3 [pid 407] <... close resumed>) = 0 [pid 701] <... futex resumed>) = 1 [pid 699] <... futex resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 701] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 411] <... ioctl resumed>) = 0 [pid 411] close(3 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 708 [pid 411] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 709 [pid 698] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 698] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 698] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6f98ca9000 [pid 698] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 698] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 700] <... ioctl resumed>) = 0 [pid 707] <... open resumed>) = 4 ./strace-static-x86_64: Process 710 attached [pid 707] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 698] <... clone resumed>, parent_tid=[710], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 710 [pid 707] <... futex resumed>) = 0 [pid 707] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 698] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 700] close(3 [pid 698] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 700] <... close resumed>) = 0 [pid 700] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 700] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 710] set_robust_list(0x7f6f98cc99e0, 24) = 0 [pid 710] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 709 attached ) = 0 [ 21.506678][ T694] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.514503][ T700] loop2: detected capacity change from 0 to 2048 [ 21.521132][ T690] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.531113][ T702] loop3: detected capacity change from 0 to 2048 [pid 710] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 698] <... futex resumed>) = 0 [pid 710] <... futex resumed>) = 1 ./strace-static-x86_64: Process 708 attached [pid 710] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 709] set_robust_list(0x5555564066e0, 24 [pid 702] <... ioctl resumed>) = 0 [pid 698] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] set_robust_list(0x5555564066e0, 24 [pid 707] <... futex resumed>) = 0 [pid 702] close(3 [pid 698] <... futex resumed>) = 1 [pid 708] <... set_robust_list resumed>) = 0 [pid 707] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 702] <... close resumed>) = 0 [pid 698] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 708] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 707] <... open resumed>) = 3 [pid 702] mkdir("./bus", 0777 [pid 708] <... prctl resumed>) = 0 [pid 707] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 702] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 708] setpgid(0, 0 [pid 707] <... futex resumed>) = 1 [pid 702] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 698] <... futex resumed>) = 0 [pid 708] <... setpgid resumed>) = 0 [pid 707] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 698] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 709] <... set_robust_list resumed>) = 0 [pid 708] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 690] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 709] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 690] ioctl(5, LOOP_CLR_FD [pid 709] <... prctl resumed>) = 0 [pid 690] <... ioctl resumed>) = 0 [pid 709] setpgid(0, 0 [pid 690] close(5 [pid 709] <... setpgid resumed>) = 0 [pid 690] <... close resumed>) = 0 [pid 690] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 683] exit_group(0 [pid 692] <... futex resumed>) = ? [pid 690] <... futex resumed>) = ? [pid 683] <... exit_group resumed>) = ? [pid 692] +++ exited with 0 +++ [pid 690] +++ exited with 0 +++ [pid 683] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=683, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 709] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 709] write(3, "1000", 4) = 4 [pid 709] close(3) = 0 [pid 408] <... restart_syscall resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 714 [pid 709] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] <... openat resumed>) = 3 [pid 707] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 698] <... futex resumed>) = 0 [pid 709] <... futex resumed>) = 0 [pid 709] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 708] write(3, "1000", 4 [pid 707] openat(-1, "/proc/self/exe", O_RDONLY [pid 698] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 714 attached [pid 709] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 708] <... write resumed>) = 4 [pid 707] <... openat resumed>) = 6 [pid 700] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 714] set_robust_list(0x5555564066e0, 24 [pid 709] <... mprotect resumed>) = 0 [pid 708] close(3 [pid 707] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 700] ioctl(7, LOOP_CLR_FD [pid 714] <... set_robust_list resumed>) = 0 [pid 708] <... close resumed>) = 0 [pid 707] <... futex resumed>) = 1 [ 21.590852][ T700] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.597052][ T690] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.607773][ T694] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.626043][ T700] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 698] <... futex resumed>) = 0 [pid 714] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 708] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 707] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 698] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 714] <... prctl resumed>) = 0 [pid 708] <... futex resumed>) = 0 [pid 707] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 698] <... futex resumed>) = 0 [pid 714] setpgid(0, 0 [pid 708] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 707] sendfile(3, 6, NULL, 140737974943952 [pid 698] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 714] <... setpgid resumed>) = 0 [pid 708] <... mmap resumed>) = 0x7f6fa0feb000 [pid 714] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 708] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 714] <... openat resumed>) = 3 [pid 708] <... mprotect resumed>) = 0 [pid 714] write(3, "1000", 4 [pid 708] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 714] <... write resumed>) = 4 [pid 714] close(3 [pid 708] <... clone resumed>, parent_tid=[716], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 716 [pid 714] <... close resumed>) = 0 [pid 708] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 714] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] <... futex resumed>) = 0 [pid 714] <... futex resumed>) = 0 [pid 708] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 714] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 708] <... futex resumed>) = 0 [pid 714] <... mmap resumed>) = 0x7f6fa0feb000 [pid 708] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 714] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 708] <... mmap resumed>) = 0x7f6fa0fca000 [pid 714] <... mprotect resumed>) = 0 [pid 708] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 714] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 708] <... mprotect resumed>) = 0 [pid 708] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 714] <... clone resumed>, parent_tid=[717], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 717 [pid 714] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] <... clone resumed>, parent_tid=[718], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 718 [pid 714] <... futex resumed>) = 0 [pid 708] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 714] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] <... futex resumed>) = 0 [pid 714] <... futex resumed>) = 0 [pid 708] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 714] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 714] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 714] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[719], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 719 [pid 714] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 714] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 709] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 707] <... sendfile resumed>) = 1048576 [pid 700] <... ioctl resumed>) = 0 [pid 707] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 700] close(7 [pid 707] <... futex resumed>) = 1 [pid 698] <... futex resumed>) = 0 [pid 700] <... close resumed>) = 0 [pid 707] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 700] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 700] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 709] <... clone resumed>, parent_tid=[720], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 720 [pid 709] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 699] exit_group(0 [pid 709] <... futex resumed>) = 0 [pid 709] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 701] <... futex resumed>) = ? [pid 700] <... futex resumed>) = ? [pid 699] <... exit_group resumed>) = ? [pid 709] <... futex resumed>) = 0 [pid 701] +++ exited with 0 +++ [pid 700] +++ exited with 0 +++ [pid 709] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 699] +++ exited with 0 +++ [pid 709] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 709] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=699, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 409] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 716 attached [pid 716] set_robust_list(0x7f6fa100b9e0, 24 [pid 409] <... restart_syscall resumed>) = 0 [pid 709] <... clone resumed>, parent_tid=[721], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 721 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 709] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 702] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 409] <... openat resumed>) = 3 [pid 709] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 702] ioctl(5, LOOP_CLR_FD [pid 409] ioctl(3, LOOP_CLR_FD [pid 702] <... ioctl resumed>) = 0 [pid 702] close(5 [pid 409] <... ioctl resumed>) = 0 [pid 702] <... close resumed>) = 0 [pid 409] close(3 [pid 702] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 694] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 702] <... futex resumed>) = 0 [pid 702] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 694] ioctl(7, LOOP_CLR_FD [pid 409] <... close resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 722 [pid 698] exit_group(0 [pid 710] <... futex resumed>) = ? [pid 707] <... futex resumed>) = ? [pid 702] <... futex resumed>) = ? [pid 698] <... exit_group resumed>) = ? [pid 707] +++ exited with 0 +++ [pid 710] +++ exited with 0 +++ [pid 716] <... set_robust_list resumed>) = 0 [pid 702] +++ exited with 0 +++ [pid 698] +++ exited with 0 +++ [pid 694] <... ioctl resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=698, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD [pid 694] close(7 [pid 716] memfd_create("syzkaller", 0) = 3 [pid 716] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 694] <... close resumed>) = 0 [pid 694] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 694] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 720 attached [pid 691] exit_group(0 [pid 720] set_robust_list(0x7f6fa100b9e0, 24 [pid 695] <... futex resumed>) = ? [pid 694] <... futex resumed>) = ? [pid 691] <... exit_group resumed>) = ? [pid 695] +++ exited with 0 +++ [pid 720] <... set_robust_list resumed>) = 0 [pid 720] memfd_create("syzkaller", 0) = 3 ./strace-static-x86_64: Process 719 attached ./strace-static-x86_64: Process 718 attached ./strace-static-x86_64: Process 717 attached [pid 720] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 719] set_robust_list(0x7f6fa0fea9e0, 24 [pid 718] set_robust_list(0x7f6fa0fea9e0, 24 [pid 717] set_robust_list(0x7f6fa100b9e0, 24./strace-static-x86_64: Process 721 attached [pid 721] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 721] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 719] <... set_robust_list resumed>) = 0 [pid 718] <... set_robust_list resumed>) = 0 [pid 717] <... set_robust_list resumed>) = 0 [pid 719] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 718] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 717] memfd_create("syzkaller", 0) = 4 ./strace-static-x86_64: Process 722 attached [pid 720] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 717] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 722] set_robust_list(0x5555564066e0, 24 [pid 717] <... mmap resumed>) = 0x7f6f98bca000 [pid 722] <... set_robust_list resumed>) = 0 [pid 722] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 722] setpgid(0, 0) = 0 [pid 722] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 722] write(3, "1000", 4) = 4 [pid 722] close(3) = 0 [pid 722] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 722] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 722] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 722] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[723], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 723 [pid 722] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 722] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 722] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 720] <... write resumed>) = 1048576 [pid 722] <... mmap resumed>) = 0x7f6fa0fca000 [pid 722] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [ 21.642670][ T702] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.656259][ T702] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 720] munmap(0x7f6f98bca000, 1048576 [pid 717] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 722] <... mprotect resumed>) = 0 [pid 708] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 722] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 708] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 722] <... clone resumed>, parent_tid=[724], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 724 [pid 708] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 714] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 708] <... mmap resumed>) = 0x7f6f98ba9000 [pid 722] <... futex resumed>) = 0 [pid 714] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] mprotect(0x7f6f98baa000, 131072, PROT_READ|PROT_WRITE [pid 722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 714] <... futex resumed>) = 0 [pid 708] <... mprotect resumed>) = 0 [pid 714] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 708] clone(child_stack=0x7f6f98bc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 714] <... mmap resumed>) = 0x7f6f98ba9000 [pid 714] mprotect(0x7f6f98baa000, 131072, PROT_READ|PROT_WRITE [pid 708] <... clone resumed>, parent_tid=[725], tls=0x7f6f98bc9700, child_tidptr=0x7f6f98bc99d0) = 725 [pid 714] <... mprotect resumed>) = 0 [pid 708] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 714] clone(child_stack=0x7f6f98bc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 708] <... futex resumed>) = 0 [pid 708] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 714] <... clone resumed>, parent_tid=[726], tls=0x7f6f98bc9700, child_tidptr=0x7f6f98bc99d0) = 726 [pid 721] <... open resumed>) = 4 [pid 714] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... ioctl resumed>) = 0 [pid 721] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 719] <... open resumed>) = 3 [pid 718] <... open resumed>) = 4 [pid 714] <... futex resumed>) = 0 [pid 410] close(3 [pid 721] <... futex resumed>) = 1 [pid 714] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 709] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 721] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 709] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 721] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 718] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 709] <... futex resumed>) = 0 ./strace-static-x86_64: Process 724 attached [pid 721] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 720] <... munmap resumed>) = 0 [pid 719] <... futex resumed>) = 0 [pid 718] <... futex resumed>) = 0 [pid 709] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 727 ./strace-static-x86_64: Process 725 attached [pid 724] set_robust_list(0x7f6fa0fea9e0, 24 [pid 721] <... mount resumed>) = 0 [pid 720] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 719] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 718] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 716] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 725] set_robust_list(0x7f6f98bc99e0, 24 [pid 724] <... set_robust_list resumed>) = 0 [pid 721] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 725] <... set_robust_list resumed>) = 0 [pid 724] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 721] <... futex resumed>) = 1 [pid 709] <... futex resumed>) = 0 [pid 725] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 721] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 709] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 725] <... mount resumed>) = 0 [pid 721] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 709] <... futex resumed>) = 0 ./strace-static-x86_64: Process 723 attached [pid 725] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 721] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 709] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 725] <... futex resumed>) = 1 [pid 723] set_robust_list(0x7f6fa100b9e0, 24 [pid 721] <... open resumed>) = 6 [pid 708] <... futex resumed>) = 0 [pid 725] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 723] <... set_robust_list resumed>) = 0 [pid 721] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 727 attached ./strace-static-x86_64: Process 726 attached [pid 723] memfd_create("syzkaller", 0 [pid 721] <... futex resumed>) = 1 [pid 718] <... futex resumed>) = 0 [pid 709] <... futex resumed>) = 0 [pid 708] <... futex resumed>) = 1 [pid 727] set_robust_list(0x5555564066e0, 24 [pid 726] set_robust_list(0x7f6f98bc99e0, 24 [pid 723] <... memfd_create resumed>) = 4 [pid 721] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 718] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 709] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 727] <... set_robust_list resumed>) = 0 [pid 726] <... set_robust_list resumed>) = 0 [pid 723] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 721] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 718] <... open resumed>) = 5 [pid 709] <... futex resumed>) = 0 [pid 727] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 726] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 723] <... mmap resumed>) = 0x7f6f98bca000 [pid 721] openat(-1, "/proc/self/exe", O_RDONLY [pid 718] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 709] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 726] <... mount resumed>) = 0 [pid 721] <... openat resumed>) = 7 [pid 718] <... futex resumed>) = 1 [pid 717] <... write resumed>) = 1048576 [pid 716] <... write resumed>) = 1048576 [pid 708] <... futex resumed>) = 0 [pid 726] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 721] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 718] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 708] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 726] <... futex resumed>) = 1 [pid 721] <... futex resumed>) = 1 [pid 718] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 717] munmap(0x7f6f98bca000, 1048576 [pid 716] munmap(0x7f6f98bca000, 1048576 [pid 714] <... futex resumed>) = 0 [pid 709] <... futex resumed>) = 0 [pid 708] <... futex resumed>) = 0 [pid 727] <... prctl resumed>) = 0 [pid 726] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 721] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 718] openat(-1, "/proc/self/exe", O_RDONLY [pid 717] <... munmap resumed>) = 0 [pid 716] <... munmap resumed>) = 0 [pid 714] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 709] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 708] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 727] setpgid(0, 0 [pid 721] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 719] <... futex resumed>) = 0 [pid 718] <... openat resumed>) = 6 [pid 717] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 716] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 714] <... futex resumed>) = 1 [pid 709] <... futex resumed>) = 0 [pid 727] <... setpgid resumed>) = 0 [pid 721] sendfile(6, 7, NULL, 140737974943952 [pid 719] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 718] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 717] <... openat resumed>) = 5 [pid 716] <... openat resumed>) = 7 [pid 714] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 709] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 727] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 721] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 719] <... open resumed>) = 6 [pid 718] <... futex resumed>) = 1 [pid 717] ioctl(5, LOOP_SET_FD, 4 [pid 716] ioctl(7, LOOP_SET_FD, 3 [pid 708] <... futex resumed>) = 0 [pid 727] <... openat resumed>) = 3 [pid 723] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 721] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 718] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 708] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 727] write(3, "1000", 4 [pid 721] <... futex resumed>) = 1 [pid 709] <... futex resumed>) = 0 [pid 708] <... futex resumed>) = 0 [pid 727] <... write resumed>) = 4 [pid 721] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 708] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 727] close(3) = 0 [pid 727] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 727] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 727] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 727] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 719] <... futex resumed>) = 1 [pid 718] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 727] <... clone resumed>, parent_tid=[728], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 728 [pid 719] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 718] sendfile(5, 6, NULL, 140737974943952 [pid 714] <... futex resumed>) = 0 [pid 727] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 723] <... write resumed>) = 1048576 [pid 727] <... futex resumed>) = 0 [pid 727] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 727] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 727] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 727] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[729], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 729 [pid 727] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 727] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 723] munmap(0x7f6f98bca000, 1048576) = 0 [pid 723] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 5 [pid 723] ioctl(5, LOOP_SET_FD, 4./strace-static-x86_64: Process 729 attached ./strace-static-x86_64: Process 728 attached [pid 718] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 717] <... ioctl resumed>) = 0 [pid 716] <... ioctl resumed>) = 0 [pid 714] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 729] set_robust_list(0x7f6fa0fea9e0, 24 [pid 728] set_robust_list(0x7f6fa100b9e0, 24 [pid 719] <... futex resumed>) = 0 [pid 718] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 717] close(4 [pid 716] close(3 [pid 714] <... futex resumed>) = 1 [pid 729] <... set_robust_list resumed>) = 0 [pid 728] <... set_robust_list resumed>) = 0 [pid 719] openat(-1, "/proc/self/exe", O_RDONLY [pid 718] <... futex resumed>) = 1 [pid 717] <... close resumed>) = 0 [pid 716] <... close resumed>) = 0 [pid 714] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 729] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 728] memfd_create("syzkaller", 0 [pid 719] <... openat resumed>) = 4 [pid 718] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 717] mkdir("./bus", 0777 [pid 716] mkdir("./bus", 0777 [pid 729] <... open resumed>) = 4 [pid 728] <... memfd_create resumed>) = 3 [pid 719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 717] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 716] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 729] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 728] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 719] <... futex resumed>) = 1 [pid 717] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 716] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 714] <... futex resumed>) = 0 [pid 729] <... futex resumed>) = 1 [pid 728] <... mmap resumed>) = 0x7f6f98bca000 [pid 719] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 714] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 729] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 728] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 719] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 714] <... futex resumed>) = 0 [pid 727] <... futex resumed>) = 0 [pid 723] <... ioctl resumed>) = 0 [pid 719] sendfile(6, 4, NULL, 140737974943952 [pid 708] <... futex resumed>) = 0 [pid 727] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 723] close(4 [pid 714] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 727] <... futex resumed>) = 0 [pid 723] <... close resumed>) = 0 [pid 727] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 723] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 723] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 729] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 729] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 729] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 727] <... futex resumed>) = 0 [pid 729] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 727] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 729] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 727] <... futex resumed>) = 0 [pid 729] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 727] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 729] <... open resumed>) = 5 [pid 729] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 727] <... futex resumed>) = 0 [pid 729] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 727] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 719] <... sendfile resumed>) = 1048576 [pid 729] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 727] <... futex resumed>) = 0 [pid 729] openat(-1, "/proc/self/exe", O_RDONLY [pid 727] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 729] <... openat resumed>) = 6 [pid 729] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 727] <... futex resumed>) = 0 [pid 729] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 727] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 729] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 727] <... futex resumed>) = 0 [pid 729] sendfile(5, 6, NULL, 140737974943952 [pid 727] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 729] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 729] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 727] <... futex resumed>) = 0 [pid 729] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 728] <... write resumed>) = 1048576 [pid 722] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 722] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 722] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 728] munmap(0x7f6f98bca000, 1048576 [pid 722] <... mmap resumed>) = 0x7f6f98ca9000 [pid 722] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE [pid 728] <... munmap resumed>) = 0 [pid 722] <... mprotect resumed>) = 0 [pid 728] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 722] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 728] <... openat resumed>) = 7 [pid 728] ioctl(7, LOOP_SET_FD, 3 [pid 722] <... clone resumed>, parent_tid=[730], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 730 [pid 724] <... open resumed>) = 3 [pid 722] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 720] <... openat resumed>) = 5 [pid 719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 724] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 722] <... futex resumed>) = 0 [pid 720] ioctl(5, LOOP_SET_FD, 3 [pid 719] <... futex resumed>) = 1 [pid 714] <... futex resumed>) = 0 ./strace-static-x86_64: Process 730 attached [pid 724] <... futex resumed>) = 0 [pid 722] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 719] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 694] +++ exited with 0 +++ [pid 691] +++ exited with 0 +++ [ 21.724134][ T717] loop1: detected capacity change from 0 to 2048 [ 21.730846][ T716] loop0: detected capacity change from 0 to 2048 [ 21.736479][ T723] loop2: detected capacity change from 0 to 2048 [ 21.752366][ T717] EXT4-fs warning (device loop1): read_mmp_block:107: Error -117 while reading MMP block 64 [ 21.763211][ T728] loop3: detected capacity change from 0 to 2048 [pid 724] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 730] set_robust_list(0x7f6f98cc99e0, 24 [pid 728] <... ioctl resumed>) = 0 [pid 720] <... ioctl resumed>) = 0 [pid 717] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 730] <... set_robust_list resumed>) = 0 [pid 720] close(3 [pid 717] ioctl(5, LOOP_CLR_FD [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=691, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 730] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 720] <... close resumed>) = 0 [pid 717] <... ioctl resumed>) = 0 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 730] <... mount resumed>) = 0 [pid 720] mkdir("./bus", 0777 [pid 717] close(5 [pid 412] <... restart_syscall resumed>) = 0 [pid 730] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 720] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 717] <... close resumed>) = 0 [pid 730] <... futex resumed>) = 1 [pid 720] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 717] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 730] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 717] <... futex resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 717] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 735 [pid 728] close(3) = 0 [pid 728] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 728] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 722] <... futex resumed>) = 0 [pid 714] exit_group(0./strace-static-x86_64: Process 735 attached [pid 735] set_robust_list(0x5555564066e0, 24) = 0 [pid 735] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 735] setpgid(0, 0) = 0 [pid 735] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 735] write(3, "1000", 4) = 4 [pid 735] close(3) = 0 [pid 735] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 735] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 735] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[736], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 736 [pid 735] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 735] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 735] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 735] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[737], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 737 [pid 735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 736 attached [pid 736] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 736] memfd_create("syzkaller", 0) = 3 [pid 736] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 724] <... futex resumed>) = 0 [pid 726] <... futex resumed>) = ? [pid 724] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 719] <... futex resumed>) = ? [pid 717] <... futex resumed>) = ? [pid 714] <... exit_group resumed>) = ? [pid 726] +++ exited with 0 +++ [pid 724] <... open resumed>) = 4 [pid 719] +++ exited with 0 +++ [pid 717] +++ exited with 0 +++ [pid 714] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=714, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 724] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 722] <... futex resumed>) = 0 [pid 724] openat(-1, "/proc/self/exe", O_RDONLY [pid 722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 722] <... futex resumed>) = 0 [pid 722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 724] <... openat resumed>) = 6 [pid 408] <... openat resumed>) = 3 [pid 408] ioctl(3, LOOP_CLR_FD [pid 724] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... ioctl resumed>) = 0 [pid 408] close(3 [pid 724] <... futex resumed>) = 1 [pid 722] <... futex resumed>) = 0 [pid 724] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... close resumed>) = 0 [pid 722] <... futex resumed>) = 0 [pid 736] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 724] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 736] <... write resumed>) = 1048576 [pid 724] sendfile(4, 6, NULL, 140737974943952 [pid 736] munmap(0x7f6f98bca000, 1048576) = 0 [pid 736] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [ 21.772232][ T720] loop4: detected capacity change from 0 to 2048 [ 21.774724][ T723] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.792082][ T723] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.796246][ T716] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 736] ioctl(4, LOOP_SET_FD, 3 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 738 [pid 736] <... ioctl resumed>) = 0 [pid 736] close(3) = 0 [pid 736] mkdir("./bus", 0777 [pid 723] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 723] ioctl(5, LOOP_CLR_FD) = 0 [pid 723] close(5 [pid 736] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 723] <... close resumed>) = 0 [pid 723] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 723] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 736] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 737 attached [pid 737] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 737] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 737] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 735] <... futex resumed>) = 0 [pid 735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 737] <... futex resumed>) = 1 [pid 737] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 737] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 735] <... futex resumed>) = 0 [pid 735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 737] <... futex resumed>) = 1 [pid 716] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 716] ioctl(7, LOOP_CLR_FD) = 0 [pid 716] close(7) = 0 [pid 716] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 716] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 708] exit_group(0 [pid 725] <... futex resumed>) = ? [pid 724] <... sendfile resumed>) = 1048576 [pid 718] <... futex resumed>) = ? [pid 716] <... futex resumed>) = ? [pid 708] <... exit_group resumed>) = ? [pid 725] +++ exited with 0 +++ [pid 724] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 718] +++ exited with 0 +++ [pid 716] +++ exited with 0 +++ [pid 708] +++ exited with 0 +++ [pid 724] <... futex resumed>) = 1 [pid 722] <... futex resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=708, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 724] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 722] exit_group(0 [pid 730] <... futex resumed>) = ? [pid 724] <... futex resumed>) = ? [pid 723] <... futex resumed>) = ? [pid 722] <... exit_group resumed>) = ? [pid 730] +++ exited with 0 +++ [pid 724] +++ exited with 0 +++ [pid 723] +++ exited with 0 +++ [pid 722] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=722, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 407] <... openat resumed>) = 3 [pid 409] ioctl(3, LOOP_CLR_FD [pid 407] ioctl(3, LOOP_CLR_FD [pid 409] <... ioctl resumed>) = 0 [pid 407] <... ioctl resumed>) = 0 [pid 409] close(3 [pid 407] close(3./strace-static-x86_64: Process 738 attached [pid 409] <... close resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 738] set_robust_list(0x5555564066e0, 24 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 738] <... set_robust_list resumed>) = 0 [ 21.827251][ T736] loop5: detected capacity change from 0 to 2048 [ 21.841527][ T716] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) ./strace-static-x86_64: Process 745 attached ./strace-static-x86_64: Process 744 attached [pid 738] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 737] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 738] <... prctl resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 744 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 745 [pid 738] setpgid(0, 0) = 0 [pid 738] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 735] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 735] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6f98ca9000 [pid 735] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 735] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[747], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 747 [pid 735] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 21.882460][ T736] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.898970][ T728] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.905092][ T736] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 735] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 745] set_robust_list(0x5555564066e0, 24) = 0 [pid 745] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 745] setpgid(0, 0) = 0 [pid 745] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 745] write(3, "1000", 4) = 4 [pid 745] close(3) = 0 [pid 745] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 738] <... openat resumed>) = 3 [pid 738] write(3, "1000", 4) = 4 [pid 738] close(3) = 0 [pid 745] <... futex resumed>) = 0 [pid 745] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 745] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 745] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[748], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 748 [pid 745] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 745] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 745] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 738] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 744] set_robust_list(0x5555564066e0, 24 [pid 738] <... futex resumed>) = 0 ./strace-static-x86_64: Process 747 attached ./strace-static-x86_64: Process 748 attached [pid 744] <... set_robust_list resumed>) = 0 [pid 738] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 737] <... open resumed>) = 5 [pid 748] set_robust_list(0x7f6fa100b9e0, 24 [pid 747] set_robust_list(0x7f6f98cc99e0, 24 [pid 744] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 738] <... mmap resumed>) = 0x7f6fa0feb000 [pid 737] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 745] <... mmap resumed>) = 0x7f6fa0fca000 [pid 745] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 745] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[749], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 749 [pid 745] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 745] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 749 attached [pid 748] <... set_robust_list resumed>) = 0 [pid 747] <... set_robust_list resumed>) = 0 [pid 744] <... prctl resumed>) = 0 [pid 738] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 737] <... futex resumed>) = 0 [pid 749] set_robust_list(0x7f6fa0fea9e0, 24 [pid 748] memfd_create("syzkaller", 0 [pid 747] openat(-1, "/proc/self/exe", O_RDONLY [pid 744] setpgid(0, 0 [pid 738] <... mprotect resumed>) = 0 [pid 737] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 749] <... set_robust_list resumed>) = 0 [pid 748] <... memfd_create resumed>) = 3 [pid 747] <... openat resumed>) = 6 [pid 744] <... setpgid resumed>) = 0 [pid 738] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 749] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 748] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 747] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 744] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 749] <... open resumed>) = 4 [pid 748] <... mmap resumed>) = 0x7f6f98bca000 [pid 747] <... futex resumed>) = 1 [pid 744] <... openat resumed>) = 3 [pid 738] <... clone resumed>, parent_tid=[750], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 750 [pid 735] <... futex resumed>) = 0 [pid 749] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 747] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 744] write(3, "1000", 4 [pid 738] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 736] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 749] <... futex resumed>) = 1 [pid 745] <... futex resumed>) = 0 [pid 744] <... write resumed>) = 4 [pid 738] <... futex resumed>) = 0 [pid 737] <... futex resumed>) = 0 [pid 736] ioctl(4, LOOP_CLR_FD [pid 735] <... futex resumed>) = 1 [pid 749] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 745] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 744] close(3 [pid 738] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 737] sendfile(5, 6, NULL, 140737974943952 [pid 736] <... ioctl resumed>) = 0 [pid 735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 750 attached [pid 749] <... mount resumed>) = 0 [pid 748] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 745] <... futex resumed>) = 0 [pid 744] <... close resumed>) = 0 [pid 738] <... futex resumed>) = 0 [pid 736] close(4 [pid 749] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 748] <... write resumed>) = 1048576 [pid 745] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 744] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 738] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 736] <... close resumed>) = 0 [pid 748] munmap(0x7f6f98bca000, 1048576) = 0 [pid 748] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 745] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 745] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 745] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 749] <... futex resumed>) = 1 [pid 745] <... futex resumed>) = 0 [pid 749] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 745] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 744] <... futex resumed>) = 0 [pid 749] <... open resumed>) = 6 [pid 748] <... openat resumed>) = 5 [pid 744] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 738] <... mmap resumed>) = 0x7f6fa0fca000 [pid 744] <... mmap resumed>) = 0x7f6fa0feb000 [pid 749] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 738] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 744] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 736] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 748] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 748] ioctl(5, LOOP_CLR_FD) = 0 [pid 749] <... futex resumed>) = 1 [pid 745] <... futex resumed>) = 0 [pid 744] <... mprotect resumed>) = 0 [pid 738] <... mprotect resumed>) = 0 [pid 736] <... futex resumed>) = 0 [pid 745] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 750] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 744] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 745] <... futex resumed>) = 0 [pid 738] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 745] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 749] openat(-1, "/proc/self/exe", O_RDONLY [pid 750] memfd_create("syzkaller", 0 [pid 749] <... openat resumed>) = 7 [pid 744] <... clone resumed>, parent_tid=[751], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 751 [pid 738] <... clone resumed>, parent_tid=[752], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 752 [pid 736] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 750] <... memfd_create resumed>) = 3 [pid 738] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 749] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 744] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 750] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 738] <... futex resumed>) = 0 [pid 749] <... futex resumed>) = 1 [pid 745] <... futex resumed>) = 0 [pid 744] <... futex resumed>) = 0 [pid 745] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 738] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 749] sendfile(6, 7, NULL, 140737974943952 [pid 745] <... futex resumed>) = 0 [pid 744] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 745] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 748] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 748] close(5) = 0 [pid 748] close(3) = 0 [pid 744] <... futex resumed>) = 0 [pid 744] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 750] <... mmap resumed>) = 0x7f6f98bca000 [pid 750] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 744] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 744] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 748] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 748] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 744] <... clone resumed>, parent_tid=[753], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 753 [pid 744] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 744] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 737] <... sendfile resumed>) = 1048576 [pid 737] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 735] <... futex resumed>) = 0 [pid 735] exit_group(0 [pid 747] <... futex resumed>) = 231 [pid 735] <... exit_group resumed>) = ? [pid 747] +++ exited with 0 +++ [pid 736] <... futex resumed>) = ? [pid 736] +++ exited with 0 +++ ./strace-static-x86_64: Process 751 attached [pid 751] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 751] memfd_create("syzkaller", 0) = 3 [pid 751] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 720] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 720] ioctl(5, LOOP_CLR_FD [pid 728] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 728] ioctl(7, LOOP_CLR_FD) = 0 [pid 728] close(7) = 0 [pid 728] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 727] exit_group(0 [pid 728] <... futex resumed>) = 0 [pid 728] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 727] <... exit_group resumed>) = ? [pid 729] <... futex resumed>) = -1 (errno 18446744073709551414) [pid 728] <... futex resumed>) = ? [pid 729] +++ exited with 0 +++ [pid 749] <... sendfile resumed>) = 1048576 [pid 749] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 745] <... futex resumed>) = 0 [pid 745] exit_group(0) = ? [pid 748] <... futex resumed>) = ? [pid 748] +++ exited with 0 +++ [pid 751] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 750] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 753 attached ./strace-static-x86_64: Process 752 attached [pid 750] munmap(0x7f6f98bca000, 1048576 [pid 753] set_robust_list(0x7f6fa0fea9e0, 24 [pid 752] set_robust_list(0x7f6fa0fea9e0, 24 [pid 750] <... munmap resumed>) = 0 [pid 752] <... set_robust_list resumed>) = 0 [pid 753] <... set_robust_list resumed>) = 0 [pid 753] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 752] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 750] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 752] <... open resumed>) = 5 [pid 753] <... open resumed>) = 4 [pid 751] <... write resumed>) = 1048576 [pid 752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 751] munmap(0x7f6f98bca000, 1048576 [pid 738] <... futex resumed>) = 0 [pid 752] <... futex resumed>) = 1 [pid 753] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 738] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 738] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 752] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 753] <... futex resumed>) = 1 [pid 744] <... futex resumed>) = 0 [pid 744] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 744] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 751] <... munmap resumed>) = 0 [pid 751] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 753] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 752] <... mount resumed>) = 0 [pid 753] <... mount resumed>) = 0 [pid 752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 753] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 752] <... futex resumed>) = 1 [pid 738] <... futex resumed>) = 0 [pid 738] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 753] <... futex resumed>) = 1 [pid 744] <... futex resumed>) = 0 [pid 738] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 744] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 753] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 744] <... futex resumed>) = 0 [pid 744] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 21.913572][ T720] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 21.940392][ T728] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 21.942127][ T720] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 752] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 750] <... openat resumed>) = 4 [pid 749] +++ exited with 0 +++ [pid 745] +++ exited with 0 +++ [pid 737] +++ exited with 0 +++ [pid 735] +++ exited with 0 +++ [pid 728] +++ exited with 0 +++ [pid 727] +++ exited with 0 +++ [pid 720] <... ioctl resumed>) = 0 [pid 753] <... open resumed>) = 6 [pid 752] <... open resumed>) = 6 [pid 751] <... openat resumed>) = 5 [pid 750] ioctl(4, LOOP_SET_FD, 3 [pid 720] close(5 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=735, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=727, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 753] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 751] ioctl(5, LOOP_SET_FD, 3 [pid 720] <... close resumed>) = 0 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=745, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 720] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... restart_syscall resumed>) = 0 [pid 410] <... restart_syscall resumed>) = 0 [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 720] <... futex resumed>) = 0 [pid 709] exit_group(0 [pid 407] <... restart_syscall resumed>) = 0 [pid 709] <... exit_group resumed>) = ? [pid 721] <... futex resumed>) = ? [pid 720] +++ exited with 0 +++ [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 412] <... openat resumed>) = 3 [pid 410] <... openat resumed>) = 3 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 412] ioctl(3, LOOP_CLR_FD [pid 410] ioctl(3, LOOP_CLR_FD [pid 407] <... openat resumed>) = 3 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] <... ioctl resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 412] close(3 [pid 410] close(3 [pid 407] <... ioctl resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 407] close(3 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] <... close resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 754 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 755 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 756 ./strace-static-x86_64: Process 755 attached [pid 755] set_robust_list(0x5555564066e0, 24) = 0 [pid 755] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 755] setpgid(0, 0 [pid 753] <... futex resumed>) = 1 [pid 752] <... futex resumed>) = 1 [pid 744] <... futex resumed>) = 0 [pid 738] <... futex resumed>) = 0 [pid 753] openat(-1, "/proc/self/exe", O_RDONLY [pid 744] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 738] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 753] <... openat resumed>) = 7 [pid 752] openat(-1, "/proc/self/exe", O_RDONLY [pid 744] <... futex resumed>) = 0 [pid 738] <... futex resumed>) = 0 [pid 753] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 744] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 738] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 753] <... futex resumed>) = 0 [pid 752] <... openat resumed>) = 7 [pid 744] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 744] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 744] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 750] <... ioctl resumed>) = 0 [pid 755] <... setpgid resumed>) = 0 [pid 755] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 750] close(3) = 0 [pid 750] mkdir("./bus", 0777./strace-static-x86_64: Process 754 attached [pid 755] <... openat resumed>) = 3 [pid 750] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 755] write(3, "1000", 4 [pid 754] set_robust_list(0x5555564066e0, 24 [pid 750] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 755] <... write resumed>) = 4 [pid 754] <... set_robust_list resumed>) = 0 [pid 755] close(3 [pid 754] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 753] sendfile(6, 7, NULL, 140737974943952 [pid 755] <... close resumed>) = 0 [pid 754] <... prctl resumed>) = 0 [pid 753] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 755] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] setpgid(0, 0 [pid 753] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 752] <... futex resumed>) = 1 [pid 738] <... futex resumed>) = 0 ./strace-static-x86_64: Process 756 attached [pid 755] <... futex resumed>) = 0 [pid 754] <... setpgid resumed>) = 0 [pid 753] <... futex resumed>) = 1 [pid 752] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 751] <... ioctl resumed>) = 0 [pid 744] <... futex resumed>) = 0 [pid 738] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 756] set_robust_list(0x5555564066e0, 24 [pid 755] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 754] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 753] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 752] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 751] close(3 [pid 756] <... set_robust_list resumed>) = 0 [pid 752] sendfile(6, 7, NULL, 140737974943952 [pid 751] <... close resumed>) = 0 [pid 756] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 751] mkdir("./bus", 0777 [pid 756] <... prctl resumed>) = 0 [pid 751] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 756] setpgid(0, 0 [pid 751] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 756] <... setpgid resumed>) = 0 [pid 756] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 756] write(3, "1000", 4) = 4 [pid 756] close(3) = 0 [pid 756] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 756] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 756] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 756] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 738] <... futex resumed>) = 0 [pid 755] <... mmap resumed>) = 0x7f6fa0feb000 [pid 756] <... clone resumed>, parent_tid=[759], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 759 [pid 756] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] <... openat resumed>) = 3 [pid 756] <... futex resumed>) = 0 [pid 756] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 22.018858][ T750] loop1: detected capacity change from 0 to 2048 [ 22.029986][ T751] loop2: detected capacity change from 0 to 2048 [ 22.049880][ T750] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. ./strace-static-x86_64: Process 759 attached [pid 756] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 755] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 754] write(3, "1000", 4 [pid 738] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 759] set_robust_list(0x7f6fa100b9e0, 24 [pid 755] <... mprotect resumed>) = 0 [pid 754] <... write resumed>) = 4 [pid 759] <... set_robust_list resumed>) = 0 [pid 755] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 754] close(3 [pid 759] memfd_create("syzkaller", 0 [pid 754] <... close resumed>) = 0 [pid 759] <... memfd_create resumed>) = 3 [pid 755] <... clone resumed>, parent_tid=[760], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 760 [pid 754] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 759] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 755] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] <... futex resumed>) = 0 [pid 759] <... mmap resumed>) = 0x7f6f98bca000 [pid 756] <... mmap resumed>) = 0x7f6fa0fca000 [pid 755] <... futex resumed>) = 0 [pid 754] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 759] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 756] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 755] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] <... mmap resumed>) = 0x7f6fa0feb000 [pid 759] <... write resumed>) = 1048576 [pid 756] <... mprotect resumed>) = 0 [pid 755] <... futex resumed>) = 0 [pid 754] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 759] munmap(0x7f6f98bca000, 1048576 [pid 756] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 755] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 754] <... mprotect resumed>) = 0 [pid 721] +++ exited with 0 +++ [pid 709] +++ exited with 0 +++ [pid 759] <... munmap resumed>) = 0 [pid 755] <... mmap resumed>) = 0x7f6fa0fca000 [pid 754] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=709, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 759] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 756] <... clone resumed>, parent_tid=[761], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 761 [pid 755] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 759] <... openat resumed>) = 4 [pid 756] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 755] <... mprotect resumed>) = 0 [pid 754] <... clone resumed>, parent_tid=[762], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 762 [pid 411] <... restart_syscall resumed>) = 0 [pid 759] ioctl(4, LOOP_SET_FD, 3 [pid 756] <... futex resumed>) = 0 [pid 755] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 754] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 751] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 759] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 756] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 754] <... futex resumed>) = 0 [pid 751] ioctl(5, LOOP_CLR_FD [pid 759] ioctl(4, LOOP_CLR_FD [pid 755] <... clone resumed>, parent_tid=[763], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 763 [pid 754] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 751] <... ioctl resumed>) = 0 [pid 750] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 759] <... ioctl resumed>) = 0 [pid 755] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] <... futex resumed>) = 0 [pid 751] close(5 [pid 750] ioctl(4, LOOP_CLR_FD [pid 411] <... openat resumed>) = 3 ./strace-static-x86_64: Process 761 attached [pid 755] <... futex resumed>) = 0 [pid 754] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 751] <... close resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 762 attached [pid 761] set_robust_list(0x7f6fa0fea9e0, 24 [pid 755] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 754] <... mmap resumed>) = 0x7f6fa0fca000 [pid 751] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) ./strace-static-x86_64: Process 760 attached [pid 762] set_robust_list(0x7f6fa100b9e0, 24 [pid 761] <... set_robust_list resumed>) = 0 [pid 759] ioctl(4, LOOP_SET_FD, 3 [pid 754] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 751] <... futex resumed>) = 0 [pid 411] close(3 [pid 762] <... set_robust_list resumed>) = 0 [pid 761] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 760] set_robust_list(0x7f6fa100b9e0, 24 [pid 759] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 754] <... mprotect resumed>) = 0 [pid 751] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 744] exit_group(0 [pid 411] <... close resumed>) = 0 [pid 762] memfd_create("syzkaller", 0 [pid 761] <... open resumed>) = 5 [pid 760] <... set_robust_list resumed>) = 0 [pid 759] close(4 [pid 754] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 753] <... futex resumed>) = ? [pid 751] <... futex resumed>) = ? [pid 744] <... exit_group resumed>) = ? [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 763 attached [pid 762] <... memfd_create resumed>) = 3 [pid 761] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 760] memfd_create("syzkaller", 0 [pid 759] <... close resumed>) = 0 [pid 753] +++ exited with 0 +++ [pid 751] +++ exited with 0 +++ [pid 744] +++ exited with 0 +++ [pid 762] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 761] <... futex resumed>) = 1 [pid 760] <... memfd_create resumed>) = 3 [pid 759] close(3 [pid 756] <... futex resumed>) = 0 [pid 754] <... clone resumed>, parent_tid=[764], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 764 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 765 [ 22.064768][ T751] EXT4-fs (loop2): VFS: Can't find ext4 filesystem [ 22.065054][ T750] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 22.071242][ T752] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [pid 763] set_robust_list(0x7f6fa0fea9e0, 24 [pid 762] <... mmap resumed>) = 0x7f6f98bca000 [pid 761] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 760] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 759] <... close resumed>) = 0 [pid 756] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=744, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- ./strace-static-x86_64: Process 765 attached ./strace-static-x86_64: Process 764 attached [pid 763] <... set_robust_list resumed>) = 0 [pid 762] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 761] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 760] <... mmap resumed>) = 0x7f6f98bca000 [pid 759] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 756] <... futex resumed>) = 0 [pid 754] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 761] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 760] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 759] <... futex resumed>) = 0 [pid 756] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 754] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 738] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 409] <... openat resumed>) = 3 [pid 765] set_robust_list(0x5555564066e0, 24 [pid 764] set_robust_list(0x7f6fa0fea9e0, 24 [pid 763] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 761] <... mount resumed>) = 0 [pid 759] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] ioctl(3, LOOP_CLR_FD [pid 765] <... set_robust_list resumed>) = 0 [pid 764] <... set_robust_list resumed>) = 0 [pid 763] <... open resumed>) = 4 [pid 761] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... ioctl resumed>) = 0 [pid 765] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 764] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 763] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 761] <... futex resumed>) = 1 [pid 756] <... futex resumed>) = 0 [pid 752] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 409] close(3 [pid 765] <... prctl resumed>) = 0 [pid 764] <... open resumed>) = 4 [pid 763] <... futex resumed>) = 1 [pid 761] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 756] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 755] <... futex resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 765] setpgid(0, 0 [pid 764] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 763] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 759] <... futex resumed>) = 0 [pid 756] <... futex resumed>) = 1 [pid 755] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 765] <... setpgid resumed>) = 0 [pid 764] <... futex resumed>) = 1 [pid 763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 759] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 756] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 755] <... futex resumed>) = 0 [pid 754] <... futex resumed>) = 0 ./strace-static-x86_64: Process 766 attached [pid 765] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 764] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 763] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 762] <... write resumed>) = 1048576 [pid 760] <... write resumed>) = 1048576 [pid 759] <... open resumed>) = 3 [pid 755] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 754] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 766 [pid 765] <... openat resumed>) = 3 [pid 764] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 763] <... mount resumed>) = 0 [pid 759] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] <... futex resumed>) = 0 [pid 759] <... futex resumed>) = 1 [pid 756] <... futex resumed>) = 0 [pid 754] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 759] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 756] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 759] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 756] <... futex resumed>) = 0 [pid 750] <... ioctl resumed>) = 0 [pid 760] munmap(0x7f6f98bca000, 1048576 [pid 759] openat(-1, "/proc/self/exe", O_RDONLY [pid 756] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 760] <... munmap resumed>) = 0 [pid 759] <... openat resumed>) = 4 [pid 760] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 759] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 765] write(3, "1000", 4 [pid 764] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 763] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 760] <... openat resumed>) = 5 [pid 759] <... futex resumed>) = 1 [pid 756] <... futex resumed>) = 0 [pid 765] <... write resumed>) = 4 [pid 764] <... mount resumed>) = 0 [pid 763] <... futex resumed>) = 1 [pid 760] ioctl(5, LOOP_SET_FD, 3 [pid 759] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 756] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 755] <... futex resumed>) = 0 [pid 752] <... futex resumed>) = 0 [pid 766] set_robust_list(0x5555564066e0, 24 [pid 765] close(3 [pid 764] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 763] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 762] munmap(0x7f6f98bca000, 1048576 [pid 759] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 752] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 750] close(4 [pid 766] <... set_robust_list resumed>) = 0 [pid 765] <... close resumed>) = 0 [pid 764] <... futex resumed>) = 1 [pid 762] <... munmap resumed>) = 0 [pid 760] <... ioctl resumed>) = 0 [pid 759] sendfile(3, 4, NULL, 140737974943952 [pid 756] <... futex resumed>) = 0 [pid 755] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] <... futex resumed>) = 0 [pid 750] <... close resumed>) = 0 [pid 766] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 765] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 764] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 762] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 760] close(3 [pid 750] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 766] <... prctl resumed>) = 0 [pid 765] <... futex resumed>) = 0 [pid 762] <... openat resumed>) = 5 [pid 760] <... close resumed>) = 0 [pid 750] <... futex resumed>) = 0 [pid 766] setpgid(0, 0 [pid 765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 763] <... futex resumed>) = 0 [pid 762] ioctl(5, LOOP_SET_FD, 3 [pid 760] mkdir("./bus", 0777 [pid 756] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 755] <... futex resumed>) = 1 [pid 754] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 750] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 738] exit_group(0 [pid 766] <... setpgid resumed>) = 0 [pid 765] <... mmap resumed>) = 0x7f6fa0feb000 [pid 764] <... futex resumed>) = 0 [pid 763] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 762] <... ioctl resumed>) = 0 [pid 760] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 759] <... sendfile resumed>) = 1048576 [pid 755] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 754] <... futex resumed>) = 1 [pid 752] <... futex resumed>) = ? [pid 750] <... futex resumed>) = ? [pid 738] <... exit_group resumed>) = ? [pid 766] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 765] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 764] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 763] <... open resumed>) = 3 [pid 762] close(3 [pid 760] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 759] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 752] +++ exited with 0 +++ [pid 750] +++ exited with 0 +++ [pid 766] <... openat resumed>) = 3 [pid 765] <... mprotect resumed>) = 0 [pid 764] <... open resumed>) = 6 [pid 763] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 762] <... close resumed>) = 0 [pid 759] <... futex resumed>) = 1 [pid 756] <... futex resumed>) = 0 [pid 738] +++ exited with 0 +++ [pid 766] write(3, "1000", 4 [pid 765] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 764] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 763] <... futex resumed>) = 1 [pid 759] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 756] exit_group(0 [pid 755] <... futex resumed>) = 0 [pid 766] <... write resumed>) = 4 [pid 764] <... futex resumed>) = 1 [pid 763] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 762] mkdir("./bus", 0777 [pid 756] <... exit_group resumed>) = ? [pid 755] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 761] <... futex resumed>) = ? [pid 759] <... futex resumed>) = -1 (errno 18446744073709551414) [pid 766] close(3 [pid 765] <... clone resumed>, parent_tid=[767], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 767 [pid 764] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 754] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=738, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 766] <... close resumed>) = 0 [pid 765] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 762] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 761] +++ exited with 0 +++ [pid 755] <... futex resumed>) = 0 [pid 754] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 766] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 765] <... futex resumed>) = 0 [pid 764] <... futex resumed>) = 0 [pid 763] openat(-1, "/proc/self/exe", O_RDONLY [pid 762] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 755] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 754] <... futex resumed>) = 1 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 766] <... futex resumed>) = 0 [pid 765] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 764] openat(-1, "/proc/self/exe", O_RDONLY [pid 763] <... openat resumed>) = 6 [pid 754] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] <... restart_syscall resumed>) = 0 [ 22.129533][ T752] File: /root/bus PID: 752 Comm: syz-executor138 [ 22.152188][ T760] loop3: detected capacity change from 0 to 2048 [ 22.164585][ T762] loop5: detected capacity change from 0 to 2048 [pid 766] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 765] <... futex resumed>) = 0 [pid 764] <... openat resumed>) = 3 [pid 763] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 767 attached [pid 766] <... mmap resumed>) = 0x7f6fa0feb000 [pid 765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 764] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 763] <... futex resumed>) = 1 [pid 755] <... futex resumed>) = 0 [pid 767] set_robust_list(0x7f6fa100b9e0, 24 [pid 766] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 765] <... mmap resumed>) = 0x7f6fa0fca000 [pid 764] <... futex resumed>) = 1 [pid 763] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 755] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 754] <... futex resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 767] <... set_robust_list resumed>) = 0 [pid 766] <... mprotect resumed>) = 0 [pid 765] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 764] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 755] <... futex resumed>) = 0 [pid 754] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... openat resumed>) = 3 [pid 767] memfd_create("syzkaller", 0 [pid 766] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 765] <... mprotect resumed>) = 0 [pid 764] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 763] sendfile(3, 6, NULL, 140737974943952 [pid 755] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 754] <... futex resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 767] <... memfd_create resumed>) = 3 [pid 765] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 764] sendfile(6, 3, NULL, 140737974943952 [pid 754] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 767] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 408] close(3 [pid 767] <... mmap resumed>) = 0x7f6f98bca000 [pid 408] <... close resumed>) = 0 [pid 767] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 766] <... clone resumed>, parent_tid=[768], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 768 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 766] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 765] <... clone resumed>, parent_tid=[770], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 770 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 771 [pid 766] <... futex resumed>) = 0 [pid 765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 766] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 770 attached ) = 0 [pid 765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 766] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 770] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 766] <... mmap resumed>) = 0x7f6fa0fca000 [pid 770] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 766] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 766] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[772], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 772 [pid 766] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 770] <... open resumed>) = 4 [pid 766] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 770] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 765] <... futex resumed>) = 0 [pid 765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 770] <... futex resumed>) = 1 [pid 770] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 770] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 765] <... futex resumed>) = 0 [pid 770] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 770] <... open resumed>) = 5 [pid 765] <... futex resumed>) = 0 [pid 770] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 770] <... futex resumed>) = 0 [pid 765] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 770] openat(-1, "/proc/self/exe", O_RDONLY [pid 765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 770] <... openat resumed>) = 6 [pid 765] <... futex resumed>) = 0 ./strace-static-x86_64: Process 771 attached [pid 770] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 771] set_robust_list(0x5555564066e0, 24 [pid 770] <... futex resumed>) = 0 [pid 765] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 771] <... set_robust_list resumed>) = 0 [pid 770] sendfile(5, 6, NULL, 140737974943952 [pid 765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 771] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 770] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 765] <... futex resumed>) = 0 [pid 771] <... prctl resumed>) = 0 [pid 770] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 767] <... write resumed>) = 1048576 [pid 765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 764] <... sendfile resumed>) = 1048576 [pid 763] <... sendfile resumed>) = 1048576 [pid 771] setpgid(0, 0 [pid 770] <... futex resumed>) = 0 [pid 765] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 771] <... setpgid resumed>) = 0 [pid 770] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 771] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 771] write(3, "1000", 4) = 4 [pid 771] close(3) = 0 [pid 771] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 771] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 771] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 771] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[773], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 773 [pid 771] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 771] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 767] munmap(0x7f6f98bca000, 1048576 [pid 771] <... futex resumed>) = 0 [pid 767] <... munmap resumed>) = 0 [pid 771] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 767] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 771] <... mmap resumed>) = 0x7f6fa0fca000 [pid 767] <... openat resumed>) = 7 [pid 771] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 767] ioctl(7, LOOP_SET_FD, 3 [pid 771] <... mprotect resumed>) = 0 ./strace-static-x86_64: Process 773 attached ./strace-static-x86_64: Process 772 attached ./strace-static-x86_64: Process 768 attached [pid 771] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 764] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 763] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 762] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 773] set_robust_list(0x7f6fa100b9e0, 24 [pid 772] set_robust_list(0x7f6fa0fea9e0, 24 [pid 768] set_robust_list(0x7f6fa100b9e0, 24 [pid 764] <... futex resumed>) = 1 [pid 763] <... futex resumed>) = 1 [pid 762] ioctl(5, LOOP_CLR_FD [pid 754] <... futex resumed>) = 0 [pid 773] <... set_robust_list resumed>) = 0 [pid 772] <... set_robust_list resumed>) = 0 [pid 768] <... set_robust_list resumed>) = 0 [pid 764] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 763] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 762] <... ioctl resumed>) = 0 [pid 773] memfd_create("syzkaller", 0 [pid 772] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 768] memfd_create("syzkaller", 0 [pid 762] close(5 [pid 773] <... memfd_create resumed>) = 3 [pid 768] <... memfd_create resumed>) = 4 [pid 767] <... ioctl resumed>) = 0 [pid 755] <... futex resumed>) = 0 [pid 772] <... open resumed>) = 3 [pid 771] <... clone resumed>, parent_tid=[775], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 775 [pid 768] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 767] close(3 [pid 771] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 767] <... close resumed>) = 0 [pid 771] <... futex resumed>) = 0 [pid 767] mkdir("./bus", 0777 [pid 771] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 767] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 767] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 775 attached [pid 775] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 775] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 771] <... futex resumed>) = 0 [pid 771] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 771] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 775] <... futex resumed>) = 1 [pid 775] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 771] <... futex resumed>) = 0 [pid 771] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 771] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 775] <... futex resumed>) = 1 [pid 775] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 771] <... futex resumed>) = 0 [pid 771] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 771] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 775] <... futex resumed>) = 1 [pid 775] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 771] <... futex resumed>) = 0 [pid 771] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 771] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 775] <... futex resumed>) = 1 [pid 775] sendfile(5, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 771] <... futex resumed>) = 0 [pid 775] <... futex resumed>) = 1 [pid 775] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 762] <... close resumed>) = 0 [pid 762] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 762] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 773] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 754] exit_group(0) = ? [pid 762] <... futex resumed>) = ? [pid 768] <... mmap resumed>) = 0x7f6f98bca000 [pid 764] <... futex resumed>) = ? [pid 772] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 762] +++ exited with 0 +++ [pid 773] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 772] <... futex resumed>) = 1 [pid 768] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 766] <... futex resumed>) = 0 [pid 764] +++ exited with 0 +++ [pid 754] +++ exited with 0 +++ [pid 772] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 766] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 772] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 766] <... futex resumed>) = 0 [pid 772] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 766] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 772] <... mount resumed>) = 0 [pid 772] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 766] <... futex resumed>) = 0 [pid 772] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 766] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 766] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 768] <... write resumed>) = 1048576 [pid 768] munmap(0x7f6f98bca000, 1048576) = 0 [pid 768] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 773] <... write resumed>) = 1048576 [pid 773] munmap(0x7f6f98bca000, 1048576) = 0 [pid 773] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 7 [pid 773] ioctl(7, LOOP_SET_FD, 3 [pid 759] +++ exited with 0 +++ [pid 756] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=754, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=756, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 772] <... open resumed>) = 5 [pid 772] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 766] <... futex resumed>) = 0 [pid 772] openat(-1, "/proc/self/exe", O_RDONLY [pid 766] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 772] <... openat resumed>) = 7 [pid 766] <... futex resumed>) = 0 [pid 772] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 766] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 772] <... futex resumed>) = 0 [pid 766] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 772] sendfile(5, 7, NULL, 140737974943952 [pid 766] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 772] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 766] <... futex resumed>) = 0 [pid 772] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 766] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 772] <... futex resumed>) = 0 [pid 766] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 772] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 768] <... openat resumed>) = 6 [ 22.197333][ T762] EXT4-fs warning (device loop5): read_mmp_block:107: Error -117 while reading MMP block 64 [ 22.201770][ T767] loop4: detected capacity change from 0 to 2048 [ 22.214807][ T760] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 22.228455][ T760] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 22.240247][ T773] loop1: detected capacity change from 0 to 2048 [pid 768] ioctl(6, LOOP_SET_FD, 4 [pid 773] <... ioctl resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 412] <... openat resumed>) = 3 [pid 407] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 407] ioctl(3, LOOP_CLR_FD [pid 412] <... ioctl resumed>) = 0 [pid 407] <... ioctl resumed>) = 0 [pid 412] close(3 [pid 407] close(3 [pid 412] <... close resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 778 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 779 [pid 773] close(3 [pid 760] <... mount resumed>) = -1 ENOTDIR (Not a directory) ./strace-static-x86_64: Process 778 attached [pid 773] <... close resumed>) = 0 [pid 760] ioctl(5, LOOP_CLR_FD [pid 773] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 773] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 778] set_robust_list(0x5555564066e0, 24 [pid 768] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 779 attached [pid 779] set_robust_list(0x5555564066e0, 24) = 0 [pid 779] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 779] setpgid(0, 0) = 0 [pid 779] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 779] write(3, "1000", 4) = 4 [pid 779] close(3) = 0 [pid 779] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 779] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 779] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 779] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[781], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 781 [pid 779] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 779] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 779] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 779] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 779] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[782], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 782 [pid 779] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 779] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 782 attached [pid 782] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 782] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 782] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 779] <... futex resumed>) = 0 [pid 779] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 779] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 782] <... futex resumed>) = 1 [pid 782] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 782] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 781 attached [pid 779] <... futex resumed>) = 0 [pid 779] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 779] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 782] <... futex resumed>) = 1 [pid 781] set_robust_list(0x7f6fa100b9e0, 24 [pid 782] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 781] <... set_robust_list resumed>) = 0 [pid 782] <... open resumed>) = 4 [pid 781] memfd_create("syzkaller", 0 [pid 782] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 781] <... memfd_create resumed>) = 5 [pid 782] <... futex resumed>) = 1 [pid 781] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 779] <... futex resumed>) = 0 [pid 778] <... set_robust_list resumed>) = 0 [pid 782] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 781] <... mmap resumed>) = 0x7f6f98bca000 [pid 779] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 782] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 779] <... futex resumed>) = 0 [pid 778] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 782] openat(-1, "/proc/self/exe", O_RDONLY [pid 779] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 768] close(4 [pid 782] <... openat resumed>) = 6 [pid 778] <... prctl resumed>) = 0 [pid 768] <... close resumed>) = 0 [pid 782] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 778] setpgid(0, 0 [pid 768] mkdir("./bus", 0777 [pid 782] <... futex resumed>) = 1 [pid 779] <... futex resumed>) = 0 [pid 778] <... setpgid resumed>) = 0 [pid 768] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 782] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 779] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 778] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 768] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 760] <... ioctl resumed>) = 0 [pid 782] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 779] <... futex resumed>) = 0 [pid 778] <... openat resumed>) = 3 [pid 760] close(5 [pid 782] sendfile(4, 6, NULL, 140737974943952 [pid 781] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [ 22.251771][ T768] loop2: detected capacity change from 0 to 2048 [ 22.272018][ T767] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 779] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 778] write(3, "1000", 4 [pid 760] <... close resumed>) = 0 [pid 782] <... sendfile resumed>) = 1048576 [pid 760] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 755] exit_group(0 [pid 782] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 763] <... futex resumed>) = ? [pid 760] <... futex resumed>) = ? [pid 755] <... exit_group resumed>) = ? [pid 782] <... futex resumed>) = 1 [pid 779] <... futex resumed>) = 0 [pid 763] +++ exited with 0 +++ [pid 760] +++ exited with 0 +++ [pid 755] +++ exited with 0 +++ [pid 782] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=755, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 786 [pid 778] <... write resumed>) = 4 ./strace-static-x86_64: Process 786 attached [pid 778] close(3 [pid 786] set_robust_list(0x5555564066e0, 24 [pid 778] <... close resumed>) = 0 [pid 786] <... set_robust_list resumed>) = 0 [pid 778] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 778] <... futex resumed>) = 0 [pid 786] <... prctl resumed>) = 0 [pid 778] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 786] setpgid(0, 0 [pid 778] <... mmap resumed>) = 0x7f6fa0feb000 [pid 786] <... setpgid resumed>) = 0 [pid 778] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 786] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 778] <... mprotect resumed>) = 0 [pid 786] <... openat resumed>) = 3 [pid 778] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 786] write(3, "1000", 4) = 4 [pid 778] <... clone resumed>, parent_tid=[788], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 788 [pid 786] close(3 [pid 778] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] <... close resumed>) = 0 [pid 778] <... futex resumed>) = 0 [pid 786] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 778] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] <... futex resumed>) = 0 [pid 778] <... futex resumed>) = 0 [pid 786] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 778] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 786] <... mmap resumed>) = 0x7f6fa0feb000 [pid 778] <... mmap resumed>) = 0x7f6fa0fca000 [pid 786] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 778] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 786] <... mprotect resumed>) = 0 [pid 778] <... mprotect resumed>) = 0 [pid 786] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 778] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 786] <... clone resumed>, parent_tid=[790], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 790 [pid 778] <... clone resumed>, parent_tid=[789], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 789 [pid 786] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 778] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] <... futex resumed>) = 0 [pid 778] <... futex resumed>) = 0 [pid 786] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 778] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 786] <... futex resumed>) = 0 [pid 786] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 786] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 786] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[791], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 791 [pid 786] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 786] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 791 attached [pid 791] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 791] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 791] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] <... futex resumed>) = 0 [pid 786] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 786] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 791] <... futex resumed>) = 1 [pid 791] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 791] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] <... futex resumed>) = 0 [pid 786] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 786] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 791] <... futex resumed>) = 1 [pid 791] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 791] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] <... futex resumed>) = 0 [pid 786] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 786] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 791] <... futex resumed>) = 1 [pid 791] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 791] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] <... futex resumed>) = 0 [pid 786] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 786] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 791] <... futex resumed>) = 1 [pid 791] sendfile(4, 5, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 791] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 786] <... futex resumed>) = 0 [pid 791] <... futex resumed>) = 1 [pid 791] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 781] <... write resumed>) = 1048576 [pid 781] munmap(0x7f6f98bca000, 1048576) = 0 [pid 781] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 7 [pid 781] ioctl(7, LOOP_SET_FD, 5) = -1 EBUSY (Device or resource busy) [pid 781] ioctl(7, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 788 attached ./strace-static-x86_64: Process 789 attached [pid 789] set_robust_list(0x7f6fa0fea9e0, 24 [pid 788] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 789] <... set_robust_list resumed>) = 0 [pid 789] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 789] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 778] <... futex resumed>) = 0 [pid 778] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 778] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 789] <... futex resumed>) = 1 [pid 789] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 788] memfd_create("syzkaller", 0 [pid 789] <... mount resumed>) = 0 [pid 788] <... memfd_create resumed>) = 4 [pid 788] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 789] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 778] <... futex resumed>) = 0 [pid 778] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 778] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 789] <... futex resumed>) = 1 [pid 789] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 789] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 767] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 781] ioctl(7, LOOP_SET_FD, 5 [pid 767] ioctl(7, LOOP_CLR_FD [pid 781] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 767] <... ioctl resumed>) = 0 [pid 778] <... futex resumed>) = 0 [pid 778] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 778] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 789] <... futex resumed>) = 1 [pid 789] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 789] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 778] <... futex resumed>) = 0 [pid 778] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 778] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 789] <... futex resumed>) = 1 [pid 789] sendfile(5, 6, NULL, 140737974943952./strace-static-x86_64: Process 790 attached [ 22.317281][ T767] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 22.330007][ T773] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 22.343636][ T768] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 790] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 790] memfd_create("syzkaller", 0 [pid 781] close(7 [pid 767] close(7 [pid 790] <... memfd_create resumed>) = 6 [pid 781] <... close resumed>) = 0 [pid 790] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 788] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 781] close(5 [pid 768] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 767] <... close resumed>) = 0 [pid 781] <... close resumed>) = 0 [pid 768] ioctl(6, LOOP_CLR_FD [pid 767] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 781] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 768] <... ioctl resumed>) = 0 [pid 767] <... futex resumed>) = 0 [pid 781] <... futex resumed>) = 0 [pid 768] close(6 [pid 767] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 765] exit_group(0 [pid 781] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 770] <... futex resumed>) = ? [pid 767] <... futex resumed>) = ? [pid 765] <... exit_group resumed>) = ? [pid 788] <... write resumed>) = 1048576 [pid 779] exit_group(0 [pid 770] +++ exited with 0 +++ [pid 768] <... close resumed>) = 0 [pid 767] +++ exited with 0 +++ [pid 765] +++ exited with 0 +++ [pid 790] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 789] <... sendfile resumed>) = 1048576 [pid 782] <... futex resumed>) = ? [pid 781] <... futex resumed>) = ? [pid 779] <... exit_group resumed>) = ? [pid 768] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 766] exit_group(0 [pid 782] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=765, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 411] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 792 [pid 788] munmap(0x7f6f98bca000, 1048576) = 0 [pid 788] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 788] ioctl(7, LOOP_SET_FD, 4 [pid 789] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 781] +++ exited with 0 +++ [pid 779] +++ exited with 0 +++ [pid 772] <... futex resumed>) = ? [pid 768] <... futex resumed>) = ? [pid 766] <... exit_group resumed>) = ? [pid 789] <... futex resumed>) = 1 [pid 788] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 778] <... futex resumed>) = 0 [pid 772] +++ exited with 0 +++ [pid 768] +++ exited with 0 +++ [pid 790] <... write resumed>) = 1048576 [pid 789] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 788] ioctl(7, LOOP_CLR_FD [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=779, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 790] munmap(0x7f6f98bca000, 1048576 [pid 788] <... ioctl resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 790] <... munmap resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 790] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 407] ioctl(3, LOOP_CLR_FD [pid 790] <... openat resumed>) = 7 [pid 407] <... ioctl resumed>) = 0 [pid 790] ioctl(7, LOOP_SET_FD, 6 [pid 407] close(3./strace-static-x86_64: Process 792 attached ) = 0 [pid 792] set_robust_list(0x5555564066e0, 24 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 792] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 793 attached [pid 792] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 790] <... ioctl resumed>) = 0 [pid 788] ioctl(7, LOOP_SET_FD, 4 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 793 [pid 793] set_robust_list(0x5555564066e0, 24 [pid 790] close(6 [pid 788] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 773] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 793] <... set_robust_list resumed>) = 0 [pid 790] <... close resumed>) = 0 [pid 788] close(7 [pid 793] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 790] mkdir("./bus", 0777 [pid 788] <... close resumed>) = 0 [pid 793] <... prctl resumed>) = 0 [pid 790] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 788] close(4 [pid 793] setpgid(0, 0 [pid 792] <... prctl resumed>) = 0 [pid 773] ioctl(7, LOOP_CLR_FD [pid 792] setpgid(0, 0 [pid 773] <... ioctl resumed>) = 0 [pid 792] <... setpgid resumed>) = 0 [pid 773] close(7 [pid 788] <... close resumed>) = 0 [pid 793] <... setpgid resumed>) = 0 [pid 790] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 788] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 793] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 792] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 788] <... futex resumed>) = 0 [pid 773] <... close resumed>) = 0 [pid 778] exit_group(0 [pid 793] <... openat resumed>) = 3 [pid 789] <... futex resumed>) = ? [pid 778] <... exit_group resumed>) = ? [pid 793] write(3, "1000", 4 [pid 792] <... openat resumed>) = 3 [pid 789] +++ exited with 0 +++ [pid 788] +++ exited with 0 +++ [pid 773] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 793] <... write resumed>) = 4 [pid 773] <... futex resumed>) = 0 [pid 793] close(3 [pid 773] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 793] <... close resumed>) = 0 [pid 793] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 793] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 771] exit_group(0 [pid 793] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 775] <... futex resumed>) = ? [pid 773] <... futex resumed>) = ? [pid 771] <... exit_group resumed>) = ? [pid 793] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 775] +++ exited with 0 +++ [pid 773] +++ exited with 0 +++ [pid 793] <... clone resumed>, parent_tid=[794], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 794 [pid 793] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 793] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 793] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 793] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 793] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 794 attached ./strace-static-x86_64: Process 795 attached , parent_tid=[795], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 795 [pid 792] write(3, "1000", 4 [pid 793] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 793] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 792] <... write resumed>) = 4 [pid 794] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 794] memfd_create("syzkaller", 0) = 3 [pid 794] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 792] close(3 [pid 795] set_robust_list(0x7f6fa0fea9e0, 24 [pid 792] <... close resumed>) = 0 [pid 795] <... set_robust_list resumed>) = 0 [pid 792] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 795] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 792] <... futex resumed>) = 0 [pid 792] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 792] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 794] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 792] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[798], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 798 [pid 792] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 792] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 792] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 792] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 ./strace-static-x86_64: Process 798 attached [pid 794] <... write resumed>) = 1048576 [pid 792] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 798] set_robust_list(0x7f6fa100b9e0, 24 [pid 794] munmap(0x7f6f98bca000, 1048576 [pid 798] <... set_robust_list resumed>) = 0 [pid 794] <... munmap resumed>) = 0 [pid 798] memfd_create("syzkaller", 0 [pid 794] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 798] <... memfd_create resumed>) = 3 [pid 794] <... openat resumed>) = 5 [pid 792] <... clone resumed>, parent_tid=[799], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 799 [pid 798] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 794] ioctl(5, LOOP_SET_FD, 3 [ 22.358449][ T768] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 22.385573][ T773] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 22.398754][ T790] loop3: detected capacity change from 0 to 2048 [pid 792] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 798] <... mmap resumed>) = 0x7f6f98bca000 [pid 794] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 798] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 794] ioctl(5, LOOP_CLR_FD [pid 792] <... futex resumed>) = 0 [pid 794] <... ioctl resumed>) = 0 [pid 794] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 794] close(5) = 0 [pid 794] close(3) = 0 [pid 794] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 794] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 798] <... write resumed>) = 1048576 [pid 798] munmap(0x7f6f98bca000, 1048576) = 0 [pid 798] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 798] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 798] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 799 attached [pid 799] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 799] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 792] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 798] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 798] close(4) = 0 [pid 798] close(3) = 0 [pid 798] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 798] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 771] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=771, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 408] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 800 ./strace-static-x86_64: Process 800 attached [pid 800] set_robust_list(0x5555564066e0, 24) = 0 [pid 800] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 800] setpgid(0, 0) = 0 [pid 800] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 800] write(3, "1000", 4) = 4 [pid 800] close(3) = 0 [pid 800] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 800] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 800] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 800] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[801], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 801 [pid 800] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 800] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 800] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 800] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 800] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[802], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 802 [pid 800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 802 attached [pid 802] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 802] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 801 attached [pid 801] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 801] memfd_create("syzkaller", 0) = 4 [pid 801] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 801] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 778] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=778, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 795] <... open resumed>) = 4 [pid 795] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 793] <... futex resumed>) = 0 [pid 795] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 793] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 794] <... futex resumed>) = 0 [pid 793] <... futex resumed>) = 1 [pid 794] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 793] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 794] <... mount resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 794] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 793] <... futex resumed>) = 0 [pid 794] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 793] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 794] <... open resumed>) = 3 [pid 793] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 794] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 793] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 794] <... futex resumed>) = 0 [pid 793] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 412] ioctl(3, LOOP_CLR_FD [pid 794] openat(-1, "/proc/self/exe", O_RDONLY [pid 793] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 794] <... openat resumed>) = 5 [pid 793] <... futex resumed>) = 0 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 794] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 793] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 794] <... futex resumed>) = 0 [pid 793] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 794] sendfile(3, 5, NULL, 140737974943952 [pid 793] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 801] <... write resumed>) = 1048576 [pid 794] <... sendfile resumed>) = 1048576 [pid 793] <... futex resumed>) = 0 [pid 412] close(3 [pid 794] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 793] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 794] <... futex resumed>) = 0 [pid 793] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 794] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 793] exit_group(0 [pid 795] <... futex resumed>) = ? [pid 794] <... futex resumed>) = ? [pid 793] <... exit_group resumed>) = ? [pid 801] munmap(0x7f6f98bca000, 1048576 [pid 795] +++ exited with 0 +++ [pid 794] +++ exited with 0 +++ [pid 793] +++ exited with 0 +++ [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 802] <... open resumed>) = 3 [pid 802] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=793, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 802] <... futex resumed>) = 1 [pid 800] <... futex resumed>) = 0 [pid 802] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 802] <... mount resumed>) = 0 [pid 800] <... futex resumed>) = 0 [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 802] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 802] <... futex resumed>) = 0 [pid 800] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 802] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 802] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 800] <... futex resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 803 [pid 802] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 802] <... open resumed>) = 5 [pid 407] <... restart_syscall resumed>) = 0 [pid 802] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 800] <... futex resumed>) = 0 [pid 802] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 801] <... munmap resumed>) = 0 [pid 800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 802] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 800] <... futex resumed>) = 0 [pid 802] openat(-1, "/proc/self/exe", O_RDONLY [pid 800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 799] <... open resumed>) = 5 [pid 802] <... openat resumed>) = 6 [pid 407] <... openat resumed>) = 3 [pid 802] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 799] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 802] <... futex resumed>) = 1 [pid 800] <... futex resumed>) = 0 [pid 802] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 799] <... futex resumed>) = 1 [pid 792] <... futex resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 802] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 800] <... futex resumed>) = 0 [pid 799] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 792] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... ioctl resumed>) = 0 [pid 802] sendfile(5, 6, NULL, 140737974943952 [pid 800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 798] <... futex resumed>) = 0 [pid 792] <... futex resumed>) = 1 [pid 407] close(3 [pid 802] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 798] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 792] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... close resumed>) = 0 [pid 802] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 801] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 798] <... mount resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 802] <... futex resumed>) = 1 [pid 801] <... openat resumed>) = 7 [pid 800] <... futex resumed>) = 0 [pid 798] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 802] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 798] <... futex resumed>) = 1 [pid 792] <... futex resumed>) = 0 [pid 798] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 792] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 798] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 792] <... futex resumed>) = 0 [pid 798] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [ 22.421401][ T790] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 22.435743][ T790] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 792] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 801] ioctl(7, LOOP_SET_FD, 4 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 804 ./strace-static-x86_64: Process 804 attached [pid 804] set_robust_list(0x5555564066e0, 24) = 0 [pid 804] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 804] setpgid(0, 0) = 0 [pid 804] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 804] write(3, "1000", 4) = 4 [pid 804] close(3) = 0 [pid 804] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 804] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 ./strace-static-x86_64: Process 803 attached [pid 804] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 803] set_robust_list(0x5555564066e0, 24 [pid 804] <... mprotect resumed>) = 0 [pid 804] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 803] <... set_robust_list resumed>) = 0 [pid 803] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 804] <... clone resumed>, parent_tid=[805], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 805 [pid 803] <... prctl resumed>) = 0 [pid 804] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 803] setpgid(0, 0 [pid 804] <... futex resumed>) = 0 [pid 804] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 803] <... setpgid resumed>) = 0 [pid 804] <... futex resumed>) = 0 [pid 803] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 804] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 804] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 804] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 803] <... openat resumed>) = 3 [pid 804] <... clone resumed>, parent_tid=[806], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 806 [pid 804] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 804] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 803] write(3, "1000", 4) = 4 [pid 803] close(3) = 0 [pid 803] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 803] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 803] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 803] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[807], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 807 [pid 803] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 803] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 803] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 803] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 803] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[808], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 808 [pid 803] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 803] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 808 attached [pid 808] set_robust_list(0x7f6fa0fea9e0, 24) = 0 ./strace-static-x86_64: Process 806 attached [pid 808] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 806] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 806] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 807 attached [pid 807] set_robust_list(0x7f6fa100b9e0, 24 [pid 790] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 790] ioctl(7, LOOP_CLR_FD) = 0 [pid 790] close(7) = 0 [pid 790] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 790] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 807] <... set_robust_list resumed>) = 0 [pid 807] memfd_create("syzkaller", 0) = 4 [pid 807] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 786] exit_group(0) = ? [pid 791] <... futex resumed>) = 231 [pid 790] <... futex resumed>) = ? [pid 791] +++ exited with 0 +++ ./strace-static-x86_64: Process 805 attached [pid 805] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 805] memfd_create("syzkaller", 0) = 4 [pid 805] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 807] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 805] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 801] <... ioctl resumed>) = 0 [pid 801] close(4 [pid 805] <... write resumed>) = 1048576 [pid 805] munmap(0x7f6f98bca000, 1048576) = 0 [pid 805] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 805] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 805] ioctl(5, LOOP_CLR_FD) = 0 [pid 805] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 805] close(5) = 0 [pid 805] close(4 [pid 766] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=766, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 798] <... open resumed>) = 3 [pid 808] <... open resumed>) = 3 [pid 806] <... open resumed>) = 3 [pid 808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 798] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 807] <... write resumed>) = 1048576 [pid 806] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 808] <... futex resumed>) = 1 [pid 798] <... futex resumed>) = 1 [pid 803] <... futex resumed>) = 0 [pid 792] <... futex resumed>) = 0 [pid 803] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 792] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 803] <... futex resumed>) = 0 [pid 792] <... futex resumed>) = 0 [pid 803] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 792] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 808] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 806] <... futex resumed>) = 1 [pid 801] <... close resumed>) = 0 [pid 798] openat(-1, "/proc/self/exe", O_RDONLY [pid 804] <... futex resumed>) = 0 [pid 808] <... mount resumed>) = 0 [pid 806] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 804] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 798] <... openat resumed>) = 4 [pid 806] <... mount resumed>) = 0 [pid 804] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 806] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 798] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 806] <... futex resumed>) = 1 [pid 804] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 808] <... futex resumed>) = 1 [pid 806] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 804] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 803] <... futex resumed>) = 0 [pid 801] mkdir("./bus", 0777 [pid 798] <... futex resumed>) = 1 [pid 792] <... futex resumed>) = 0 [pid 808] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 806] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 804] <... futex resumed>) = 0 [pid 803] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 798] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 792] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... openat resumed>) = 3 [pid 808] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 806] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 804] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 803] <... futex resumed>) = 0 [pid 798] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 792] <... futex resumed>) = 0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 808] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 803] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 798] sendfile(3, 4, NULL, 140737974943952 [pid 792] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 798] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 409] close(3 [pid 798] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... close resumed>) = 0 [pid 801] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 798] <... futex resumed>) = 1 [pid 792] <... futex resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 798] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 792] exit_group(0 [pid 799] <... futex resumed>) = ? [pid 798] <... futex resumed>) = ? [pid 792] <... exit_group resumed>) = ? [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 809 [pid 799] +++ exited with 0 +++ [pid 798] +++ exited with 0 +++ [pid 807] munmap(0x7f6f98bca000, 1048576 [pid 792] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=792, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 807] <... munmap resumed>) = 0 [pid 807] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 807] <... openat resumed>) = 6 [pid 411] <... openat resumed>) = 3 [pid 801] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 805] <... close resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 810 [pid 807] ioctl(6, LOOP_SET_FD, 4./strace-static-x86_64: Process 810 attached ./strace-static-x86_64: Process 809 attached ) = 0 [pid 805] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 809] set_robust_list(0x5555564066e0, 24 [pid 810] set_robust_list(0x5555564066e0, 24 [pid 809] <... set_robust_list resumed>) = 0 [pid 805] <... futex resumed>) = 0 [pid 807] close(4) = 0 [pid 807] mkdir("./bus", 0777 [pid 810] <... set_robust_list resumed>) = 0 [pid 809] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 807] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 805] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 810] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 809] <... prctl resumed>) = 0 [pid 810] <... prctl resumed>) = 0 [pid 809] setpgid(0, 0 [pid 807] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 810] setpgid(0, 0 [pid 809] <... setpgid resumed>) = 0 [pid 810] <... setpgid resumed>) = 0 [pid 810] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 809] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 810] <... openat resumed>) = 3 [pid 809] <... openat resumed>) = 3 [pid 810] write(3, "1000", 4) = 4 [pid 810] close(3) = 0 [pid 810] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 810] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 810] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 810] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[813], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 813 [pid 810] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 810] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 810] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 810] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 810] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[815], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 815 [pid 810] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 810] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 809] write(3, "1000", 4) = 4 [ 22.466617][ T801] loop1: detected capacity change from 0 to 2048 [ 22.497962][ T807] loop5: detected capacity change from 0 to 2048 [pid 809] close(3) = 0 [pid 809] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 809] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 809] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 809] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[816], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 816 [pid 809] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 809] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 809] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 809] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 809] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[817], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 817 [pid 809] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 809] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 813 attached [pid 813] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 813] memfd_create("syzkaller", 0) = 3 [pid 813] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 790] +++ exited with 0 +++ [pid 786] +++ exited with 0 +++ [pid 808] <... open resumed>) = 5 [pid 806] <... open resumed>) = 4 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=786, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 806] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 808] <... futex resumed>) = 1 [pid 806] <... futex resumed>) = 1 [pid 804] <... futex resumed>) = 0 [pid 803] <... futex resumed>) = 0 [pid 808] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 806] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 804] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 803] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 808] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 805] <... futex resumed>) = 0 [pid 804] <... futex resumed>) = 1 [pid 803] <... futex resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 808] openat(-1, "/proc/self/exe", O_RDONLY [pid 805] openat(-1, "/proc/self/exe", O_RDONLY [pid 804] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 803] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] ioctl(3, LOOP_CLR_FD [pid 808] <... openat resumed>) = 4 [pid 805] <... openat resumed>) = 5 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 805] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] close(3./strace-static-x86_64: Process 817 attached ./strace-static-x86_64: Process 816 attached ./strace-static-x86_64: Process 815 attached [pid 808] <... futex resumed>) = 1 [pid 805] <... futex resumed>) = 1 [pid 804] <... futex resumed>) = 0 [pid 803] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 808] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 805] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 804] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 803] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 808] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 805] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 804] <... futex resumed>) = 0 [pid 803] <... futex resumed>) = 0 [pid 813] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 808] sendfile(5, 4, NULL, 140737974943952 [pid 805] sendfile(4, 5, NULL, 140737974943952 [pid 804] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 803] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 819 [pid 808] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 805] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 805] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 808] <... futex resumed>) = 1 [pid 805] <... futex resumed>) = 1 [pid 804] <... futex resumed>) = 0 [pid 803] <... futex resumed>) = 0 [pid 808] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 805] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 804] exit_group(0 [pid 806] <... futex resumed>) = ? [pid 805] <... futex resumed>) = ? [pid 804] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 819 attached [pid 817] set_robust_list(0x7f6fa0fea9e0, 24 [pid 816] set_robust_list(0x7f6fa100b9e0, 24 [pid 815] set_robust_list(0x7f6fa0fea9e0, 24 [pid 813] <... write resumed>) = 1048576 [pid 806] +++ exited with 0 +++ [pid 805] +++ exited with 0 +++ [pid 804] +++ exited with 0 +++ [pid 819] set_robust_list(0x5555564066e0, 24 [pid 817] <... set_robust_list resumed>) = 0 [pid 816] <... set_robust_list resumed>) = 0 [pid 815] <... set_robust_list resumed>) = 0 [pid 813] munmap(0x7f6f98bca000, 1048576 [pid 819] <... set_robust_list resumed>) = 0 [pid 817] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 816] memfd_create("syzkaller", 0 [pid 815] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 813] <... munmap resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=804, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 819] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 817] <... open resumed>) = 3 [pid 816] <... memfd_create resumed>) = 4 [pid 815] <... open resumed>) = 4 [pid 813] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 819] <... prctl resumed>) = 0 [pid 817] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 816] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 815] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 813] <... openat resumed>) = 5 [pid 407] <... restart_syscall resumed>) = 0 [pid 819] setpgid(0, 0 [pid 817] <... futex resumed>) = 1 [pid 816] <... mmap resumed>) = 0x7f6f98bca000 [pid 815] <... futex resumed>) = 1 [pid 813] ioctl(5, LOOP_SET_FD, 3 [pid 810] <... futex resumed>) = 0 [ 22.511437][ T801] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 22.536124][ T801] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 22.549490][ T807] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 809] <... futex resumed>) = 0 [pid 819] <... setpgid resumed>) = 0 [pid 817] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 816] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 815] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 813] <... ioctl resumed>) = 0 [pid 810] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 817] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 816] <... write resumed>) = 1048576 [pid 815] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 813] close(3 [pid 810] <... futex resumed>) = 0 [pid 809] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 801] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 819] <... openat resumed>) = 3 [pid 817] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 816] munmap(0x7f6f98bca000, 1048576 [pid 815] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 813] <... close resumed>) = 0 [pid 810] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 809] <... futex resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 819] write(3, "1000", 4 [pid 817] <... mount resumed>) = 0 [pid 809] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 819] <... write resumed>) = 4 [pid 817] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 815] <... mount resumed>) = 0 [pid 809] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... openat resumed>) = 3 [pid 819] close(3 [pid 817] <... futex resumed>) = 0 [pid 816] <... munmap resumed>) = 0 [pid 815] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 813] mkdir("./bus", 0777 [pid 809] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 801] ioctl(7, LOOP_CLR_FD [pid 407] ioctl(3, LOOP_CLR_FD [pid 819] <... close resumed>) = 0 [pid 817] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 816] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 815] <... futex resumed>) = 1 [pid 813] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 810] <... futex resumed>) = 0 [pid 809] <... futex resumed>) = 0 [pid 801] <... ioctl resumed>) = 0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 819] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 817] <... open resumed>) = 6 [pid 816] <... openat resumed>) = 5 [pid 815] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 813] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 810] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 809] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 801] close(7 [pid 407] close(3 [pid 817] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 816] ioctl(5, LOOP_SET_FD, 4 [pid 810] <... futex resumed>) = 0 [pid 809] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... close resumed>) = 0 [pid 817] <... futex resumed>) = 0 [pid 819] <... futex resumed>) = 0 [pid 815] <... open resumed>) = 3 [pid 801] <... close resumed>) = 0 [pid 819] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 815] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 801] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] <... mmap resumed>) = 0x7f6fa0feb000 [pid 815] <... futex resumed>) = 0 [pid 801] <... futex resumed>) = 0 [pid 819] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 815] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 801] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 819] <... mprotect resumed>) = 0 [pid 817] openat(-1, "/proc/self/exe", O_RDONLY [pid 810] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 809] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 819] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 817] <... openat resumed>) = 7 [pid 810] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 809] <... futex resumed>) = 0 [pid 809] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 810] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 817] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] <... clone resumed>, parent_tid=[820], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 820 [pid 817] <... futex resumed>) = 0 [pid 815] <... futex resumed>) = 0 [pid 810] <... futex resumed>) = 1 [pid 809] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 800] exit_group(0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 821 [pid 819] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 817] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 815] openat(-1, "/proc/self/exe", O_RDONLY [pid 810] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 809] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 802] <... futex resumed>) = ? [pid 801] <... futex resumed>) = ? [pid 800] <... exit_group resumed>) = ? [pid 819] <... futex resumed>) = 0 [pid 817] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 815] <... openat resumed>) = 6 [pid 809] <... futex resumed>) = 0 [pid 802] +++ exited with 0 +++ [pid 801] +++ exited with 0 +++ [pid 819] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 815] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] <... futex resumed>) = 0 [pid 815] <... futex resumed>) = 1 [pid 810] <... futex resumed>) = 0 [pid 819] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 815] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 810] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] <... mmap resumed>) = 0x7f6fa0fca000 [pid 817] sendfile(6, 7, NULL, 140737974943952 [pid 815] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 810] <... futex resumed>) = 0 [pid 809] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 819] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 815] sendfile(3, 6, NULL, 140737974943952 [ 22.569321][ T813] loop4: detected capacity change from 0 to 2048 [ 22.579294][ T807] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 22.601069][ T816] loop2: detected capacity change from 0 to 2048 [pid 810] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 821 attached ./strace-static-x86_64: Process 820 attached [pid 819] <... mprotect resumed>) = 0 [pid 816] <... ioctl resumed>) = 0 [pid 816] close(4 [pid 820] set_robust_list(0x7f6fa100b9e0, 24 [pid 816] <... close resumed>) = 0 [pid 820] <... set_robust_list resumed>) = 0 [pid 816] mkdir("./bus", 0777 [pid 820] memfd_create("syzkaller", 0 [pid 816] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 820] <... memfd_create resumed>) = 3 [pid 816] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 820] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 820] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 821] set_robust_list(0x5555564066e0, 24) = 0 [pid 821] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 821] setpgid(0, 0) = 0 [pid 821] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 821] write(3, "1000", 4) = 4 [pid 821] close(3) = 0 [pid 821] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 821] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 821] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 821] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[822], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 822 [pid 821] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 821] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 821] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 821] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 821] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[823], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 823 [pid 821] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 821] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 819] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 807] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 807] ioctl(6, LOOP_CLR_FD) = 0 [pid 807] close(6) = 0 [pid 807] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 807] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 819] <... clone resumed>, parent_tid=[824], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 824 ./strace-static-x86_64: Process 824 attached [pid 819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 803] exit_group(0 [pid 807] <... futex resumed>) = ? [pid 808] <... futex resumed>) = ? [pid 803] <... exit_group resumed>) = ? [pid 808] +++ exited with 0 +++ [pid 807] +++ exited with 0 +++ [pid 803] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=803, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 820] <... write resumed>) = 1048576 [pid 412] <... ioctl resumed>) = 0 [pid 820] munmap(0x7f6f98bca000, 1048576) = 0 [pid 412] close(3 [pid 820] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 820] <... openat resumed>) = 4 [pid 820] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 825 attached ./strace-static-x86_64: Process 823 attached ./strace-static-x86_64: Process 822 attached [pid 824] set_robust_list(0x7f6fa0fea9e0, 24 [pid 817] <... sendfile resumed>) = 1048576 [pid 815] <... sendfile resumed>) = 1048576 [pid 813] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 825 [pid 824] <... set_robust_list resumed>) = 0 [pid 823] set_robust_list(0x7f6fa0fea9e0, 24 [pid 822] set_robust_list(0x7f6fa100b9e0, 24 [pid 817] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 815] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 824] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 823] <... set_robust_list resumed>) = 0 [pid 822] <... set_robust_list resumed>) = 0 [pid 817] <... futex resumed>) = 1 [pid 815] <... futex resumed>) = 1 [pid 813] ioctl(5, LOOP_CLR_FD [pid 810] <... futex resumed>) = 0 [pid 824] <... open resumed>) = 5 [pid 823] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 822] memfd_create("syzkaller", 0 [pid 817] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 815] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 813] <... ioctl resumed>) = 0 [pid 824] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 823] <... open resumed>) = 3 [pid 822] <... memfd_create resumed>) = 4 [pid 813] close(5 [pid 809] <... futex resumed>) = 0 [pid 824] <... futex resumed>) = 1 [pid 823] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 822] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 819] <... futex resumed>) = 0 [pid 813] <... close resumed>) = 0 [pid 824] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 823] <... futex resumed>) = 1 [pid 822] <... mmap resumed>) = 0x7f6f98bca000 [pid 819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 813] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 810] exit_group(0 [pid 825] set_robust_list(0x5555564066e0, 24 [pid 824] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 823] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 821] <... futex resumed>) = 0 [pid 820] <... ioctl resumed>) = 0 [pid 819] <... futex resumed>) = 0 [pid 815] <... futex resumed>) = ? [pid 813] <... futex resumed>) = ? [pid 810] <... exit_group resumed>) = ? [pid 824] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 815] +++ exited with 0 +++ [pid 813] +++ exited with 0 +++ [pid 810] +++ exited with 0 +++ [pid 825] <... set_robust_list resumed>) = 0 [pid 824] <... mount resumed>) = 0 [pid 821] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 820] close(3 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=810, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 825] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 824] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 823] <... futex resumed>) = 0 [pid 821] <... futex resumed>) = 1 [pid 820] <... close resumed>) = 0 [pid 822] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 825] <... prctl resumed>) = 0 [pid 822] <... write resumed>) = 1048576 [pid 821] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 820] mkdir("./bus", 0777 [pid 825] setpgid(0, 0 [pid 820] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 825] <... setpgid resumed>) = 0 [pid 820] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 825] write(3, "1000", 4) = 4 [pid 825] close(3 [pid 822] munmap(0x7f6f98bca000, 1048576 [pid 825] <... close resumed>) = 0 [pid 825] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 822] <... munmap resumed>) = 0 [pid 825] <... futex resumed>) = 0 [pid 825] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 822] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 825] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 822] <... openat resumed>) = 5 [pid 825] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 822] ioctl(5, LOOP_SET_FD, 4 [pid 825] <... clone resumed>, parent_tid=[828], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 828 [pid 825] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 824] <... futex resumed>) = 1 [pid 823] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 819] <... futex resumed>) = 0 [pid 824] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 823] <... mount resumed>) = 0 [pid 819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 824] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 823] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] <... futex resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 824] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 823] <... futex resumed>) = 1 [pid 821] <... futex resumed>) = 0 [pid 819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] ioctl(3, LOOP_CLR_FD [pid 823] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [ 22.616838][ T813] EXT4-fs warning (device loop4): read_mmp_block:107: Error -117 while reading MMP block 64 [ 22.633975][ T820] loop3: detected capacity change from 0 to 2048 [ 22.653370][ T816] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 821] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... ioctl resumed>) = 0 [pid 823] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 821] <... futex resumed>) = 0 [pid 411] close(3 [pid 823] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 821] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 829 ./strace-static-x86_64: Process 828 attached [pid 828] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 828] memfd_create("syzkaller", 0) = 3 [pid 825] <... futex resumed>) = 0 [pid 824] <... open resumed>) = 3 [pid 823] <... open resumed>) = 6 [pid 822] <... ioctl resumed>) = 0 [pid 824] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 823] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 824] <... futex resumed>) = 1 [pid 823] <... futex resumed>) = 1 [pid 821] <... futex resumed>) = 0 [pid 819] <... futex resumed>) = 0 [pid 824] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 823] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 821] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 824] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 823] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 821] <... futex resumed>) = 0 [pid 819] <... futex resumed>) = 0 [pid 824] openat(-1, "/proc/self/exe", O_RDONLY [pid 823] openat(-1, "/proc/self/exe", O_RDONLY [pid 821] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 824] <... openat resumed>) = 6 [pid 823] <... openat resumed>) = 7 [pid 828] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 824] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 823] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 829 attached [pid 828] <... mmap resumed>) = 0x7f6f98beb000 [pid 824] <... futex resumed>) = 1 [pid 823] <... futex resumed>) = 1 [pid 821] <... futex resumed>) = 0 [pid 819] <... futex resumed>) = 0 [pid 829] set_robust_list(0x5555564066e0, 24 [pid 824] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 823] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 821] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 829] <... set_robust_list resumed>) = 0 [pid 824] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 823] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 821] <... futex resumed>) = 0 [pid 819] <... futex resumed>) = 0 [pid 829] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 824] sendfile(3, 6, NULL, 140737974943952 [pid 823] sendfile(6, 7, NULL, 140737974943952 [pid 821] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 829] <... prctl resumed>) = 0 [pid 828] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 825] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 824] <... sendfile resumed>) = 1048576 [pid 822] close(4 [pid 829] setpgid(0, 0 [pid 825] <... futex resumed>) = 0 [pid 824] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 823] <... sendfile resumed>) = 1048576 [pid 822] <... close resumed>) = 0 [pid 816] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 825] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 822] mkdir("./bus", 0777 [pid 816] ioctl(5, LOOP_CLR_FD [pid 825] <... mmap resumed>) = 0x7f6f98bca000 [pid 822] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 825] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 822] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 829] <... setpgid resumed>) = 0 [pid 828] <... write resumed>) = 1048576 [pid 825] <... mprotect resumed>) = 0 [pid 824] <... futex resumed>) = 1 [pid 823] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 819] <... futex resumed>) = 0 [pid 800] +++ exited with 0 +++ [pid 829] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 824] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 823] <... futex resumed>) = 1 [pid 821] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=800, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 829] <... openat resumed>) = 3 [pid 828] munmap(0x7f6f98beb000, 1048576 [pid 825] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 823] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 829] write(3, "1000", 4 [pid 828] <... munmap resumed>) = 0 [pid 829] <... write resumed>) = 4 [pid 828] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 825] <... clone resumed>, parent_tid=[832], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 832 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 829] close(3 [pid 828] <... openat resumed>) = 4 [pid 825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... openat resumed>) = 3 [pid 829] <... close resumed>) = 0 [pid 828] ioctl(4, LOOP_SET_FD, 3 [ 22.657601][ T822] loop0: detected capacity change from 0 to 2048 [ 22.673351][ T816] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 22.690275][ T820] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 22.690670][ T822] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [ 22.704032][ T820] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 408] ioctl(3, LOOP_CLR_FD [pid 829] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 825] <... futex resumed>) = 0 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 829] <... futex resumed>) = 0 [pid 825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] close(3 [pid 829] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 408] <... close resumed>) = 0 [pid 829] <... mmap resumed>) = 0x7f6fa0feb000 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 829] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 833 [pid 829] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[834], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 834 [pid 829] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 829] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 829] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 829] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 829] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[835], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 835 [pid 829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 835 attached [pid 835] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 835] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 835] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 829] <... futex resumed>) = 0 [pid 829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 835] <... futex resumed>) = 1 [pid 835] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 833 attached ) = 0 [pid 833] set_robust_list(0x5555564066e0, 24 [pid 835] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 833] <... set_robust_list resumed>) = 0 [pid 829] <... futex resumed>) = 0 [pid 829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 835] <... futex resumed>) = 1 [pid 835] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 833] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 835] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 833] <... prctl resumed>) = 0 [pid 835] <... futex resumed>) = 1 [pid 833] setpgid(0, 0 [pid 829] <... futex resumed>) = 0 [pid 835] openat(-1, "/proc/self/exe", O_RDONLY [pid 833] <... setpgid resumed>) = 0 [pid 829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 835] <... openat resumed>) = 5 [pid 833] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 829] <... futex resumed>) = 0 [pid 835] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 833] <... openat resumed>) = 3 [pid 829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 835] <... futex resumed>) = 0 [pid 833] write(3, "1000", 4 [pid 829] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 835] sendfile(4, 5, NULL, 140737974943952 [pid 833] <... write resumed>) = 4 [pid 829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 833] close(3 [pid 829] <... futex resumed>) = 0 [pid 820] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 833] <... close resumed>) = 0 [pid 829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 820] ioctl(4, LOOP_CLR_FD [pid 833] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 835] <... sendfile resumed>) = 1048576 [pid 833] <... futex resumed>) = 0 [pid 835] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 833] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 835] <... futex resumed>) = 1 [pid 833] <... mmap resumed>) = 0x7f6fa0feb000 [pid 829] <... futex resumed>) = 0 [pid 835] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 833] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 833] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 828] <... ioctl resumed>) = 0 [pid 828] close(3 [pid 833] <... clone resumed>, parent_tid=[836], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 836 [pid 828] <... close resumed>) = 0 [pid 833] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 828] mkdir("./bus", 0777 [pid 833] <... futex resumed>) = 0 [pid 828] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 833] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 828] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 833] <... futex resumed>) = 0 [pid 833] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 833] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 833] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[837], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 837 [pid 833] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 837 attached ./strace-static-x86_64: Process 836 attached ./strace-static-x86_64: Process 834 attached ./strace-static-x86_64: Process 832 attached ) = 0 [pid 822] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 816] <... ioctl resumed>) = 0 [pid 837] set_robust_list(0x7f6fa0fea9e0, 24 [pid 834] set_robust_list(0x7f6fa100b9e0, 24 [pid 833] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 832] set_robust_list(0x7f6f98bea9e0, 24 [pid 837] <... set_robust_list resumed>) = 0 [pid 836] set_robust_list(0x7f6fa100b9e0, 24 [pid 834] <... set_robust_list resumed>) = 0 [pid 832] <... set_robust_list resumed>) = 0 [pid 822] ioctl(5, LOOP_CLR_FD [pid 816] close(5 [pid 837] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 836] <... set_robust_list resumed>) = 0 [pid 834] memfd_create("syzkaller", 0 [pid 832] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 816] <... close resumed>) = 0 [pid 837] <... open resumed>) = 3 [pid 834] <... memfd_create resumed>) = 6 [pid 832] <... open resumed>) = 3 [pid 816] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 837] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 834] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 832] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 816] <... futex resumed>) = 0 [pid 837] <... futex resumed>) = 1 [pid 836] memfd_create("syzkaller", 0 [pid 834] <... mmap resumed>) = 0x7f6f98bca000 [pid 833] <... futex resumed>) = 0 [pid 832] <... futex resumed>) = 1 [pid 822] <... ioctl resumed>) = 0 [pid 816] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 837] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 836] <... memfd_create resumed>) = 4 [pid 825] <... futex resumed>) = 0 [pid 825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 837] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 834] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 833] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 832] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 822] close(5 [pid 809] exit_group(0 [pid 837] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 836] <... mmap resumed>) = 0x7f6f98bca000 [ 22.723791][ T828] loop5: detected capacity change from 0 to 2048 [pid 837] <... mount resumed>) = 0 [pid 834] <... write resumed>) = 1048576 [pid 833] <... futex resumed>) = 0 [pid 832] <... mount resumed>) = 0 [pid 809] <... exit_group resumed>) = ? [pid 816] <... futex resumed>) = -1 (errno 18446744073709551555) [pid 817] <... futex resumed>) = ? [pid 837] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 836] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 833] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 832] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 822] <... close resumed>) = 0 [pid 817] +++ exited with 0 +++ [pid 816] +++ exited with 0 +++ [pid 809] +++ exited with 0 +++ [pid 837] <... futex resumed>) = 0 [pid 833] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 832] <... futex resumed>) = 1 [pid 822] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 821] exit_group(0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=809, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 837] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 833] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 832] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 823] <... futex resumed>) = ? [pid 822] <... futex resumed>) = ? [pid 821] <... exit_group resumed>) = ? [pid 837] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 833] <... futex resumed>) = 0 [pid 825] <... futex resumed>) = 0 [pid 823] +++ exited with 0 +++ [pid 822] +++ exited with 0 +++ [pid 821] +++ exited with 0 +++ [pid 837] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 833] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=821, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 837] <... open resumed>) = 5 [pid 836] <... write resumed>) = 1048576 [pid 834] munmap(0x7f6f98bca000, 1048576 [pid 837] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 833] <... futex resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 837] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 833] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 407] <... openat resumed>) = 3 [pid 837] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 833] <... futex resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD [pid 837] openat(-1, "/proc/self/exe", O_RDONLY [pid 833] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] ioctl(3, LOOP_CLR_FD [pid 407] <... ioctl resumed>) = 0 [pid 837] <... openat resumed>) = 6 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 407] close(3 [pid 837] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] close(3 [pid 407] <... close resumed>) = 0 [pid 837] <... futex resumed>) = 1 [pid 834] <... munmap resumed>) = 0 [pid 833] <... futex resumed>) = 0 [pid 832] <... futex resumed>) = 0 [pid 828] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 825] <... futex resumed>) = 1 [pid 820] <... ioctl resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 837] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 834] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 833] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 832] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 828] ioctl(4, LOOP_CLR_FD [pid 825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 837] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 834] <... openat resumed>) = 7 [pid 833] <... futex resumed>) = 0 [pid 832] <... open resumed>) = 5 [pid 820] close(4 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 840 ./strace-static-x86_64: Process 841 attached ./strace-static-x86_64: Process 840 attached [pid 837] sendfile(5, 6, NULL, 140737974943952 [pid 836] munmap(0x7f6f98bca000, 1048576 [pid 833] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 841 [pid 837] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 834] ioctl(7, LOOP_SET_FD, 6 [pid 832] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 820] <... close resumed>) = 0 [pid 841] set_robust_list(0x5555564066e0, 24 [pid 840] set_robust_list(0x5555564066e0, 24 [pid 837] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 836] <... munmap resumed>) = 0 [pid 834] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 832] <... futex resumed>) = 1 [pid 825] <... futex resumed>) = 0 [pid 820] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 841] <... set_robust_list resumed>) = 0 [pid 837] <... futex resumed>) = 1 [pid 833] <... futex resumed>) = 0 [pid 837] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 819] exit_group(0 [pid 841] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 840] <... set_robust_list resumed>) = 0 [pid 836] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 834] ioctl(7, LOOP_CLR_FD [pid 832] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 824] <... futex resumed>) = ? [pid 819] <... exit_group resumed>) = ? [pid 841] <... prctl resumed>) = 0 [pid 840] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 836] <... openat resumed>) = 7 [pid 834] <... ioctl resumed>) = 0 [pid 832] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 825] <... futex resumed>) = 0 [pid 824] +++ exited with 0 +++ [pid 820] <... futex resumed>) = ? [pid 841] setpgid(0, 0) = 0 [pid 841] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 832] openat(-1, "/proc/self/exe", O_RDONLY [pid 825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 841] <... openat resumed>) = 3 [pid 840] <... prctl resumed>) = 0 [ 22.774942][ T828] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 22.795259][ T828] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 836] ioctl(7, LOOP_SET_FD, 4 [pid 832] <... openat resumed>) = 6 [pid 820] +++ exited with 0 +++ [pid 819] +++ exited with 0 +++ [pid 841] write(3, "1000", 4 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=819, si_uid=0, si_status=0, si_utime=0, si_stime=6} --- [pid 841] <... write resumed>) = 4 [pid 841] close(3) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 841] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... openat resumed>) = 3 [pid 841] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 841] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 841] <... mmap resumed>) = 0x7f6fa0feb000 [pid 410] close(3 [pid 841] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 832] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... close resumed>) = 0 [pid 841] <... mprotect resumed>) = 0 [pid 834] ioctl(7, LOOP_SET_FD, 6 [pid 832] <... futex resumed>) = 1 [pid 825] <... futex resumed>) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 841] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 834] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 832] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 834] close(7 [pid 832] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 825] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 842 ./strace-static-x86_64: Process 843 attached ./strace-static-x86_64: Process 842 attached [pid 841] <... clone resumed>, parent_tid=[843], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 843 [pid 840] setpgid(0, 0 [pid 834] <... close resumed>) = 0 [pid 832] sendfile(5, 6, NULL, 140737974943952 [pid 825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 841] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 841] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 841] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 834] close(6 [pid 841] <... mmap resumed>) = 0x7f6fa0fca000 [pid 828] <... ioctl resumed>) = 0 [pid 841] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 828] close(4 [pid 841] <... mprotect resumed>) = 0 [pid 828] <... close resumed>) = 0 [pid 841] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 828] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 834] <... close resumed>) = 0 [pid 828] <... futex resumed>) = 0 [pid 841] <... clone resumed>, parent_tid=[844], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 844 [pid 828] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 841] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 841] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 844 attached [pid 844] set_robust_list(0x7f6fa0fea9e0, 24 [pid 840] <... setpgid resumed>) = 0 [pid 834] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 832] <... sendfile resumed>) = 1048576 [pid 829] exit_group(0 [pid 835] <... futex resumed>) = ? [pid 829] <... exit_group resumed>) = ? [pid 840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 835] +++ exited with 0 +++ [pid 834] <... futex resumed>) = ? [pid 832] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 844] <... set_robust_list resumed>) = 0 [pid 840] <... openat resumed>) = 3 [pid 844] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 843] set_robust_list(0x7f6fa100b9e0, 24 [pid 842] set_robust_list(0x5555564066e0, 24 [pid 840] write(3, "1000", 4 [pid 836] <... ioctl resumed>) = 0 [pid 832] <... futex resumed>) = 1 [pid 825] <... futex resumed>) = 0 [pid 844] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 843] <... set_robust_list resumed>) = 0 [pid 842] <... set_robust_list resumed>) = 0 [pid 840] <... write resumed>) = 4 [pid 836] close(4 [pid 832] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 825] exit_group(0 [pid 844] <... futex resumed>) = 1 [pid 843] memfd_create("syzkaller", 0 [pid 842] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 841] <... futex resumed>) = 0 [pid 840] close(3 [pid 836] <... close resumed>) = 0 [pid 832] <... futex resumed>) = ? [pid 828] <... futex resumed>) = ? [pid 825] <... exit_group resumed>) = ? [pid 844] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 843] <... memfd_create resumed>) = 4 [pid 842] <... prctl resumed>) = 0 [pid 841] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 840] <... close resumed>) = 0 [pid 836] mkdir("./bus", 0777 [pid 832] +++ exited with 0 +++ [pid 828] +++ exited with 0 +++ [pid 844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 841] <... futex resumed>) = 0 [pid 844] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 841] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 840] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 825] +++ exited with 0 +++ [pid 844] <... mount resumed>) = 0 [pid 843] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 842] setpgid(0, 0 [pid 840] <... futex resumed>) = 0 [pid 836] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=825, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 844] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 843] <... mmap resumed>) = 0x7f6f98bca000 [pid 842] <... setpgid resumed>) = 0 [pid 840] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 836] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 844] <... futex resumed>) = 1 [pid 842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 841] <... futex resumed>) = 0 [pid 840] <... mmap resumed>) = 0x7f6fa0feb000 [pid 412] <... restart_syscall resumed>) = 0 [pid 844] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 842] <... openat resumed>) = 3 [pid 841] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 840] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 844] <... open resumed>) = 5 [pid 842] write(3, "1000", 4 [pid 841] <... futex resumed>) = 0 [pid 840] <... mprotect resumed>) = 0 [pid 844] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 842] <... write resumed>) = 4 [pid 841] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 840] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 844] <... futex resumed>) = 0 [pid 842] close(3 [pid 841] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 22.830478][ T836] loop1: detected capacity change from 0 to 2048 [pid 412] <... openat resumed>) = 3 [pid 844] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 841] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] ioctl(3, LOOP_CLR_FD [pid 844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 841] <... futex resumed>) = 0 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 844] openat(-1, "/proc/self/exe", O_RDONLY [pid 841] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] close(3 [pid 844] <... openat resumed>) = 6 [pid 412] <... close resumed>) = 0 [pid 844] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 844] <... futex resumed>) = 1 [pid 841] <... futex resumed>) = 0 [pid 844] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 841] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 846 [pid 844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 841] <... futex resumed>) = 0 [pid 844] sendfile(5, 6, NULL, 140737974943952 [pid 841] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 844] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 844] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 841] <... futex resumed>) = 0 [pid 844] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 845 attached [pid 845] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 845] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 846 attached [pid 846] set_robust_list(0x5555564066e0, 24) = 0 [pid 840] <... clone resumed>, parent_tid=[845], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 845 [pid 842] <... close resumed>) = 0 [pid 840] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 845] <... futex resumed>) = 0 [pid 842] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 840] <... futex resumed>) = 1 [pid 845] memfd_create("syzkaller", 0 [pid 842] <... futex resumed>) = 0 [pid 840] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 845] <... memfd_create resumed>) = 3 [pid 842] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 840] <... futex resumed>) = 0 [pid 845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 842] <... mmap resumed>) = 0x7f6fa0feb000 [pid 840] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 845] <... mmap resumed>) = 0x7f6f98bca000 [pid 843] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 842] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 840] <... mmap resumed>) = 0x7f6fa0fca000 [pid 846] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 843] <... write resumed>) = 1048576 [pid 842] <... mprotect resumed>) = 0 [pid 840] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 836] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 846] <... prctl resumed>) = 0 [pid 843] munmap(0x7f6f98bca000, 1048576 [pid 842] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 840] <... mprotect resumed>) = 0 [pid 846] setpgid(0, 0 [pid 843] <... munmap resumed>) = 0 [pid 840] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 836] ioctl(7, LOOP_CLR_FD [pid 846] <... setpgid resumed>) = 0 [pid 843] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 842] <... clone resumed>, parent_tid=[847], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 847 [pid 846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 843] <... openat resumed>) = 7 [pid 842] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 840] <... clone resumed>, parent_tid=[848], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 848 [pid 836] <... ioctl resumed>) = 0 [pid 846] <... openat resumed>) = 3 [pid 843] ioctl(7, LOOP_SET_FD, 4 [pid 842] <... futex resumed>) = 0 [pid 840] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 848 attached ./strace-static-x86_64: Process 847 attached [pid 845] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 848] set_robust_list(0x7f6fa0fea9e0, 24 [pid 847] set_robust_list(0x7f6fa100b9e0, 24 [pid 845] <... write resumed>) = 1048576 [pid 842] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 840] <... futex resumed>) = 0 [pid 834] +++ exited with 0 +++ [pid 829] +++ exited with 0 +++ [pid 848] <... set_robust_list resumed>) = 0 [pid 847] <... set_robust_list resumed>) = 0 [pid 845] munmap(0x7f6f98bca000, 1048576 [pid 848] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 847] memfd_create("syzkaller", 0 [pid 845] <... munmap resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=829, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 847] <... memfd_create resumed>) = 3 [pid 845] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 842] <... futex resumed>) = 0 [pid 840] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 847] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 845] <... openat resumed>) = 5 [pid 411] <... openat resumed>) = 3 [pid 847] <... mmap resumed>) = 0x7f6f98beb000 [pid 845] ioctl(5, LOOP_SET_FD, 3 [pid 411] ioctl(3, LOOP_CLR_FD [pid 847] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 846] write(3, "1000", 4 [pid 842] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 836] close(7 [pid 411] <... ioctl resumed>) = 0 [pid 846] <... write resumed>) = 4 [pid 842] <... mmap resumed>) = 0x7f6f98bca000 [pid 411] close(3 [pid 846] close(3 [pid 842] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 836] <... close resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 846] <... close resumed>) = 0 [pid 842] <... mprotect resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 846] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 842] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 836] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 846] <... futex resumed>) = 0 [pid 836] <... futex resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 849 [pid 846] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 842] <... clone resumed>, parent_tid=[850], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 850 [pid 846] <... mmap resumed>) = 0x7f6fa0feb000 [pid 842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 836] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 833] exit_group(0 [pid 846] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 842] <... futex resumed>) = 0 [pid 837] <... futex resumed>) = ? [pid 836] <... futex resumed>) = ? [pid 833] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 850 attached [pid 848] <... open resumed>) = 4 [pid 846] <... mprotect resumed>) = 0 [pid 843] <... ioctl resumed>) = 0 [pid 842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 847] <... write resumed>) = 1048576 [pid 837] +++ exited with 0 +++ [pid 836] +++ exited with 0 +++ [pid 848] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 846] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 843] close(4 [pid 848] <... futex resumed>) = 1 [pid 843] <... close resumed>) = 0 [pid 840] <... futex resumed>) = 0 [pid 848] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 846] <... clone resumed>, parent_tid=[851], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 851 [pid 840] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 851 attached ./strace-static-x86_64: Process 849 attached [pid 850] set_robust_list(0x7f6f98bea9e0, 24 [pid 848] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 847] munmap(0x7f6f98beb000, 1048576 [pid 846] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 845] <... ioctl resumed>) = 0 [pid 843] mkdir("./bus", 0777 [pid 840] <... futex resumed>) = 0 [pid 850] <... set_robust_list resumed>) = 0 [pid 848] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 846] <... futex resumed>) = 0 [pid 845] close(3 [pid 843] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 840] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 851] set_robust_list(0x7f6fa100b9e0, 24 [pid 850] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 848] <... mount resumed>) = 0 [pid 846] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 845] <... close resumed>) = 0 [pid 843] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 848] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 850] <... open resumed>) = 4 [pid 848] <... futex resumed>) = 1 [pid 840] <... futex resumed>) = 0 [pid 848] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 840] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 848] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 840] <... futex resumed>) = 0 [pid 848] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 840] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 851] <... set_robust_list resumed>) = 0 [pid 850] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 849] set_robust_list(0x5555564066e0, 24 [pid 848] <... open resumed>) = 3 [pid 846] <... futex resumed>) = 0 [pid 845] mkdir("./bus", 0777 [pid 851] memfd_create("syzkaller", 0 [pid 850] <... futex resumed>) = 1 [pid 848] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 846] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 849] <... set_robust_list resumed>) = 0 [pid 845] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 842] <... futex resumed>) = 0 [pid 851] <... memfd_create resumed>) = 3 [pid 850] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 849] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 848] <... futex resumed>) = 1 [pid 846] <... mmap resumed>) = 0x7f6fa0fca000 [pid 845] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 840] <... futex resumed>) = 0 [pid 847] <... munmap resumed>) = 0 [pid 851] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 850] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 849] <... prctl resumed>) = 0 [pid 848] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 846] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 842] <... futex resumed>) = 0 [pid 840] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 850] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 848] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 846] <... mprotect resumed>) = 0 [pid 842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 840] <... futex resumed>) = 0 [pid 850] <... mount resumed>) = 0 [pid 848] openat(-1, "/proc/self/exe", O_RDONLY [pid 840] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 851] <... mmap resumed>) = 0x7f6f98bca000 [pid 850] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 849] setpgid(0, 0 [pid 848] <... openat resumed>) = 6 [pid 847] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 846] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 850] <... futex resumed>) = 1 [pid 848] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 842] <... futex resumed>) = 0 [pid 850] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 848] <... futex resumed>) = 1 [pid 842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 840] <... futex resumed>) = 0 [pid 850] <... open resumed>) = 5 [pid 849] <... setpgid resumed>) = 0 [pid 848] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 846] <... clone resumed>, parent_tid=[852], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 852 [pid 842] <... futex resumed>) = 0 [pid 840] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 850] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 848] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 846] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 840] <... futex resumed>) = 0 [pid 850] <... futex resumed>) = 0 [pid 849] <... openat resumed>) = 3 [pid 848] sendfile(3, 6, NULL, 140737974943952 [pid 846] <... futex resumed>) = 0 [pid 842] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 840] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 851] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 850] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 849] write(3, "1000", 4 [pid 848] <... sendfile resumed>) = 1048576 [pid 847] <... openat resumed>) = 6 [pid 846] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 850] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 849] <... write resumed>) = 4 [pid 848] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 842] <... futex resumed>) = 0 [ 22.872080][ T836] EXT4-fs (loop1): VFS: Can't find ext4 filesystem [ 22.885899][ T843] loop2: detected capacity change from 0 to 2048 [ 22.900365][ T845] loop0: detected capacity change from 0 to 2048 [pid 847] ioctl(6, LOOP_SET_FD, 3 [pid 850] openat(-1, "/proc/self/exe", O_RDONLY [pid 849] close(3 [pid 848] <... futex resumed>) = 1 [pid 842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 840] <... futex resumed>) = 0 [pid 850] <... openat resumed>) = 7 [pid 849] <... close resumed>) = 0 [pid 848] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 852 attached [pid 850] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 852] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 852] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 851] <... write resumed>) = 1048576 [pid 851] munmap(0x7f6f98bca000, 1048576 [pid 850] <... futex resumed>) = 1 [pid 851] <... munmap resumed>) = 0 [pid 851] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 851] ioctl(5, LOOP_SET_FD, 3 [pid 852] <... open resumed>) = 4 [pid 850] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 849] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 847] <... ioctl resumed>) = 0 [pid 842] <... futex resumed>) = 0 [pid 852] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 849] <... futex resumed>) = 0 [pid 847] close(3 [pid 842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 852] <... futex resumed>) = 1 [pid 850] <... futex resumed>) = 0 [pid 849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 847] <... close resumed>) = 0 [pid 846] <... futex resumed>) = 0 [pid 842] <... futex resumed>) = 1 [pid 833] +++ exited with 0 +++ [pid 852] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 850] sendfile(5, 7, NULL, 140737974943952 [pid 849] <... mmap resumed>) = 0x7f6fa0feb000 [pid 847] mkdir("./bus", 0777 [pid 846] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 852] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 849] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 847] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 846] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=833, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 852] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 849] <... mprotect resumed>) = 0 [pid 847] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 846] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 852] <... mount resumed>) = 0 [pid 849] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 852] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 849] <... clone resumed>, parent_tid=[855], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 855 [pid 846] <... futex resumed>) = 0 [pid 852] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 849] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 846] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 852] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 849] <... futex resumed>) = 0 [pid 846] <... futex resumed>) = 0 [pid 852] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 849] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 846] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 849] <... futex resumed>) = 0 [pid 849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 849] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 849] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[856], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 856 [pid 849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 855 attached [pid 855] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 855] memfd_create("syzkaller", 0) = 3 [pid 855] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [ 22.934175][ T847] loop3: detected capacity change from 0 to 2048 [ 22.941077][ T851] loop5: detected capacity change from 0 to 2048 [ 22.949681][ T845] EXT4-fs warning (device loop0): read_mmp_block:107: Error -117 while reading MMP block 64 [ 22.968998][ T847] EXT4-fs (loop3): VFS: Can't find ext4 filesystem [pid 855] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 847] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 847] ioctl(6, LOOP_CLR_FD) = 0 [pid 847] close(6) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 847] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 847] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3./strace-static-x86_64: Process 856 attached [pid 852] <... open resumed>) = 6 [pid 851] <... ioctl resumed>) = 0 [pid 845] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 408] <... close resumed>) = 0 [pid 852] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 846] <... futex resumed>) = 0 [pid 852] openat(-1, "/proc/self/exe", O_RDONLY [pid 846] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 852] <... openat resumed>) = 7 [pid 846] <... futex resumed>) = 0 [pid 852] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 846] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 852] <... futex resumed>) = 0 [pid 846] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 852] sendfile(6, 7, NULL, 140737974943952 [pid 846] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 846] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 855] <... write resumed>) = 1048576 [pid 855] munmap(0x7f6f98bca000, 1048576) = 0 [pid 855] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 855] ioctl(4, LOOP_SET_FD, 3 [pid 856] set_robust_list(0x7f6fa0fea9e0, 24 [pid 851] close(3 [pid 845] ioctl(5, LOOP_CLR_FD [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 856] <... set_robust_list resumed>) = 0 [pid 851] <... close resumed>) = 0 [pid 845] <... ioctl resumed>) = 0 [pid 856] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 855] <... ioctl resumed>) = 0 [pid 851] mkdir("./bus", 0777 [pid 845] close(5./strace-static-x86_64: Process 857 attached [pid 856] <... open resumed>) = 5 [pid 855] close(3 [pid 851] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 850] <... sendfile resumed>) = 1048576 [pid 845] <... close resumed>) = 0 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 857 [pid 856] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 851] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 850] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 845] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 857] set_robust_list(0x5555564066e0, 24 [pid 856] <... futex resumed>) = 1 [pid 855] <... close resumed>) = 0 [pid 850] <... futex resumed>) = 1 [pid 849] <... futex resumed>) = 0 [pid 845] <... futex resumed>) = 0 [pid 842] <... futex resumed>) = 0 [pid 856] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 842] exit_group(0 [pid 856] <... mount resumed>) = 0 [pid 849] <... futex resumed>) = 0 [pid 847] <... futex resumed>) = ? [pid 842] <... exit_group resumed>) = ? [pid 856] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 847] +++ exited with 0 +++ [pid 845] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 851] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 857] <... set_robust_list resumed>) = 0 [pid 855] mkdir("./bus", 0777 [pid 856] <... futex resumed>) = 0 [pid 849] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 856] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 850] +++ exited with 0 +++ [pid 849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 842] +++ exited with 0 +++ [pid 840] exit_group(0 [pid 857] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 856] <... open resumed>) = 3 [pid 855] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 851] ioctl(5, LOOP_CLR_FD [pid 849] <... futex resumed>) = 0 [pid 857] <... prctl resumed>) = 0 [pid 856] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 855] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 851] <... ioctl resumed>) = 0 [pid 849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 848] <... futex resumed>) = ? [pid 845] <... futex resumed>) = ? [pid 843] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 840] <... exit_group resumed>) = ? [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=842, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 856] <... futex resumed>) = 0 [pid 849] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 848] +++ exited with 0 +++ [pid 845] +++ exited with 0 +++ [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 856] openat(-1, "/proc/self/exe", O_RDONLY [pid 849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... restart_syscall resumed>) = 0 [pid 849] <... futex resumed>) = 0 [pid 856] <... openat resumed>) = 6 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = 0 [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 856] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 852] <... sendfile resumed>) = 1048576 [pid 849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 856] <... futex resumed>) = 0 [pid 852] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 849] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 858 [pid 856] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 852] <... futex resumed>) = 1 [pid 849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 846] <... futex resumed>) = 0 [pid 856] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 852] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 849] <... futex resumed>) = 0 [pid 856] sendfile(3, 6, NULL, 140737974943952 [pid 849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 851] close(5) = 0 [pid 851] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 851] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 857] setpgid(0, 0 [pid 843] ioctl(7, LOOP_CLR_FD) = 0 [pid 857] <... setpgid resumed>) = 0 [pid 843] close(7 [pid 846] exit_group(0 [pid 852] <... futex resumed>) = ? [pid 846] <... exit_group resumed>) = ? [pid 851] <... futex resumed>) = ? [pid 857] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 852] +++ exited with 0 +++ [pid 843] <... close resumed>) = 0 [pid 857] <... openat resumed>) = 3 [pid 843] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 857] write(3, "1000", 4 [pid 843] <... futex resumed>) = 0 ./strace-static-x86_64: Process 858 attached [ 22.973590][ T843] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 22.995234][ T843] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.003577][ T855] loop4: detected capacity change from 0 to 2048 [ 23.016796][ T851] EXT4-fs (loop5): VFS: Can't find ext4 filesystem [pid 857] <... write resumed>) = 4 [pid 856] <... sendfile resumed>) = 1048576 [pid 843] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 858] set_robust_list(0x5555564066e0, 24 [pid 856] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 858] <... set_robust_list resumed>) = 0 [pid 856] <... futex resumed>) = 1 [pid 849] <... futex resumed>) = 0 [pid 858] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 856] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 858] <... prctl resumed>) = 0 [pid 858] setpgid(0, 0) = 0 [pid 858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 858] write(3, "1000", 4) = 4 [pid 858] close(3) = 0 [pid 858] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 858] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 858] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 858] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 841] exit_group(0 [pid 858] <... clone resumed>, parent_tid=[861], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 861 [pid 858] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 858] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 858] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 858] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 858] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[862], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 862 [pid 858] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 858] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 862 attached [pid 862] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 862] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 862] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 861 attached ) = 1 [pid 857] close(3 [pid 855] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 844] <... futex resumed>) = ? [pid 843] <... futex resumed>) = ? [pid 841] <... exit_group resumed>) = ? [pid 840] +++ exited with 0 +++ [pid 858] <... futex resumed>) = 0 [pid 857] <... close resumed>) = 0 [pid 855] ioctl(4, LOOP_CLR_FD [pid 844] +++ exited with 0 +++ [pid 843] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=840, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 858] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 857] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 855] <... ioctl resumed>) = 0 [pid 857] <... futex resumed>) = 0 [pid 855] close(4 [pid 857] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 855] <... close resumed>) = 0 [pid 857] <... mmap resumed>) = 0x7f6fa0feb000 [pid 855] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 857] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 855] <... futex resumed>) = 0 [pid 857] <... mprotect resumed>) = 0 [pid 855] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 857] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 858] <... futex resumed>) = 0 [pid 857] <... clone resumed>, parent_tid=[863], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 863 [pid 858] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 857] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 857] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 857] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 857] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 407] <... openat resumed>) = 3 [pid 857] <... mprotect resumed>) = 0 [pid 849] exit_group(0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 857] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 849] <... exit_group resumed>) = ? [pid 856] <... futex resumed>) = ? [pid 855] <... futex resumed>) = ? [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 407] close(3 [pid 856] +++ exited with 0 +++ [pid 857] <... clone resumed>, parent_tid=[864], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 864 [pid 407] <... close resumed>) = 0 [pid 862] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 857] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 862] <... mount resumed>) = 0 [pid 857] <... futex resumed>) = 0 [pid 862] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 857] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 865 [pid 862] <... futex resumed>) = 1 [pid 862] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 858] <... futex resumed>) = 0 [pid 861] set_robust_list(0x7f6fa100b9e0, 24./strace-static-x86_64: Process 864 attached [pid 864] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 864] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 863 attached ./strace-static-x86_64: Process 865 attached [pid 861] <... set_robust_list resumed>) = 0 [pid 858] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 863] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 863] memfd_create("syzkaller", 0) = 4 [pid 862] <... futex resumed>) = 0 [pid 858] <... futex resumed>) = 1 [pid 862] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 861] memfd_create("syzkaller", 0 [pid 858] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 863] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 861] <... memfd_create resumed>) = 5 [pid 861] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 865] set_robust_list(0x5555564066e0, 24) = 0 [pid 861] <... mmap resumed>) = 0x7f6f98bca000 [pid 861] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 865] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 865] setpgid(0, 0) = 0 [pid 865] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 863] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 865] <... openat resumed>) = 3 [pid 865] write(3, "1000", 4) = 4 [pid 865] close(3) = 0 [pid 865] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 865] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 865] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 865] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 866 attached , parent_tid=[866], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 866 [pid 863] <... write resumed>) = 1048576 [pid 861] <... write resumed>) = 1048576 [pid 865] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 851] +++ exited with 0 +++ [pid 846] +++ exited with 0 +++ [pid 864] <... open resumed>) = 3 [pid 862] <... open resumed>) = 4 [pid 866] set_robust_list(0x7f6fa100b9e0, 24 [pid 864] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 866] <... set_robust_list resumed>) = 0 [pid 863] munmap(0x7f6f98bca000, 1048576 [pid 862] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 861] munmap(0x7f6f98bca000, 1048576 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=846, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 865] <... futex resumed>) = 0 [pid 865] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 865] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 864] <... futex resumed>) = 1 [pid 862] <... futex resumed>) = 1 [pid 857] <... futex resumed>) = 0 [pid 865] <... mmap resumed>) = 0x7f6fa0fca000 [pid 858] <... futex resumed>) = 0 [pid 865] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 858] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 857] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 862] openat(-1, "/proc/self/exe", O_RDONLY [pid 864] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 865] <... mprotect resumed>) = 0 [pid 858] <... futex resumed>) = 0 [pid 865] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 864] <... mount resumed>) = 0 [pid 862] <... openat resumed>) = 6 [pid 858] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 857] <... futex resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 865] <... clone resumed>, parent_tid=[867], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 867 [pid 865] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 865] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 867 attached [pid 867] set_robust_list(0x7f6fa0fea9e0, 24 [pid 857] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 864] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 862] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 867] <... set_robust_list resumed>) = 0 [pid 867] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 864] <... futex resumed>) = 0 [pid 862] <... futex resumed>) = 1 [pid 857] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 857] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 862] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 864] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 857] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 858] <... futex resumed>) = 0 [pid 864] <... open resumed>) = 5 [pid 864] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 858] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 864] <... futex resumed>) = 1 [pid 857] <... futex resumed>) = 0 [pid 864] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 857] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 864] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 857] <... futex resumed>) = 0 [pid 864] openat(-1, "/proc/self/exe", O_RDONLY [pid 857] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 862] <... futex resumed>) = 0 [pid 858] <... futex resumed>) = 1 [pid 864] <... openat resumed>) = 6 [pid 864] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 862] sendfile(4, 6, NULL, 140737974943952 [pid 858] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 864] <... futex resumed>) = 1 [pid 857] <... futex resumed>) = 0 [pid 864] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 857] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 864] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 857] <... futex resumed>) = 0 [pid 864] sendfile(5, 6, NULL, 140737974943952 [pid 862] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 857] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 863] <... munmap resumed>) = 0 [pid 862] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 858] <... futex resumed>) = 0 [pid 863] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 862] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 866] memfd_create("syzkaller", 0) = 4 [pid 863] <... openat resumed>) = 7 [pid 867] <... open resumed>) = 3 [pid 866] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 863] ioctl(7, LOOP_SET_FD, 4 [pid 867] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 865] <... futex resumed>) = 0 [pid 866] <... mmap resumed>) = 0x7f6f98bca000 [pid 865] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 863] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 865] <... futex resumed>) = 0 [pid 865] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 863] ioctl(7, LOOP_CLR_FD [pid 867] <... futex resumed>) = 1 [pid 867] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 863] <... ioctl resumed>) = 0 [pid 861] <... munmap resumed>) = 0 [pid 867] <... mount resumed>) = 0 [pid 867] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 865] <... futex resumed>) = 0 [pid 865] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 861] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 865] <... futex resumed>) = 0 [pid 863] ioctl(7, LOOP_SET_FD, 4 [pid 865] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 863] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 867] <... futex resumed>) = 1 [pid 863] close(7 [pid 867] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 863] <... close resumed>) = 0 [pid 864] <... sendfile resumed>) = 1048576 [pid 863] close(4 [pid 864] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 867] <... open resumed>) = 5 [pid 867] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 865] <... futex resumed>) = 0 [pid 865] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 865] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 867] <... futex resumed>) = 1 [pid 867] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 867] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 865] <... futex resumed>) = 0 [pid 865] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 865] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 867] <... futex resumed>) = 1 [pid 867] sendfile(5, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 867] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 864] <... futex resumed>) = 1 [pid 857] <... futex resumed>) = 0 [pid 864] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 865] <... futex resumed>) = 0 [pid 867] <... futex resumed>) = 1 [pid 867] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 863] <... close resumed>) = 0 [pid 861] <... openat resumed>) = 7 [pid 863] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 863] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 861] ioctl(7, LOOP_SET_FD, 5 [pid 857] exit_group(0 [pid 864] <... futex resumed>) = ? [pid 857] <... exit_group resumed>) = ? [pid 864] +++ exited with 0 +++ [pid 863] <... futex resumed>) = ? [ 23.045530][ T859] EXT4-fs warning (device loop4): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 23.056308][ T855] EXT4-fs (loop4): get root inode failed [ 23.061874][ T855] EXT4-fs (loop4): mount failed [pid 866] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 866] munmap(0x7f6f98bca000, 1048576) = 0 [pid 866] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 7 [pid 866] ioctl(7, LOOP_SET_FD, 4 [pid 861] <... ioctl resumed>) = 0 [pid 855] +++ exited with 0 +++ [pid 849] +++ exited with 0 +++ [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 868 [pid 861] close(5) = 0 [pid 861] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 861] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 863] +++ exited with 0 +++ [pid 857] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=849, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 411] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 869 ./strace-static-x86_64: Process 868 attached [pid 868] set_robust_list(0x5555564066e0, 24 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=857, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR./strace-static-x86_64: Process 869 attached [pid 868] <... set_robust_list resumed>) = 0 [pid 866] <... ioctl resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 868] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 866] close(4 [pid 408] ioctl(3, LOOP_CLR_FD [pid 869] set_robust_list(0x5555564066e0, 24 [pid 408] <... ioctl resumed>) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 869] <... set_robust_list resumed>) = 0 [pid 868] <... prctl resumed>) = 0 [pid 866] <... close resumed>) = 0 ./strace-static-x86_64: Process 870 attached [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 870 [pid 869] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 868] setpgid(0, 0 [pid 866] mkdir("./bus", 0777 [pid 870] set_robust_list(0x5555564066e0, 24) = 0 [pid 870] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 869] <... prctl resumed>) = 0 [pid 870] <... prctl resumed>) = 0 [pid 870] setpgid(0, 0) = 0 [pid 870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 870] write(3, "1000", 4) = 4 [pid 870] close(3 [pid 869] setpgid(0, 0 [pid 868] <... setpgid resumed>) = 0 [pid 866] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 870] <... close resumed>) = 0 [pid 869] <... setpgid resumed>) = 0 [pid 870] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 870] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 870] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 868] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 870] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 869] <... openat resumed>) = 3 [pid 869] write(3, "1000", 4 [pid 866] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 869] <... write resumed>) = 4 [pid 870] <... clone resumed>, parent_tid=[871], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 871 [pid 869] close(3 [pid 870] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 869] <... close resumed>) = 0 [pid 870] <... futex resumed>) = 0 [pid 869] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 870] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 869] <... futex resumed>) = 0 [pid 870] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 869] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 870] <... mmap resumed>) = 0x7f6fa0fca000 [pid 869] <... mmap resumed>) = 0x7f6fa0feb000 [pid 870] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 869] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 870] <... mprotect resumed>) = 0 [pid 870] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 869] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 870] <... clone resumed>, parent_tid=[873], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 873 [pid 870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 869] <... clone resumed>, parent_tid=[872], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 872 [pid 869] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 872 attached [pid 872] set_robust_list(0x7f6fa100b9e0, 24 [pid 869] <... futex resumed>) = 0 [pid 869] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 872] <... set_robust_list resumed>) = 0 [pid 869] <... futex resumed>) = 0 [pid 869] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 872] memfd_create("syzkaller", 0 [pid 869] <... mmap resumed>) = 0x7f6fa0fca000 [pid 869] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 872] <... memfd_create resumed>) = 3 [pid 869] <... mprotect resumed>) = 0 [pid 872] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 869] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[874], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 874 [pid 868] <... openat resumed>) = 3 [pid 869] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 869] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 874 attached ./strace-static-x86_64: Process 873 attached ./strace-static-x86_64: Process 871 attached [pid 868] write(3, "1000", 4 [pid 841] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=841, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 875 ./strace-static-x86_64: Process 875 attached [pid 875] set_robust_list(0x5555564066e0, 24) = 0 [pid 875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 875] setpgid(0, 0) = 0 [pid 875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 875] write(3, "1000", 4) = 4 [pid 875] close(3) = 0 [pid 875] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 875] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 875] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 875] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[877], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 877 [pid 875] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 875] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 875] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 875] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 868] <... write resumed>) = 4 [pid 875] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[878], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 878 [pid 868] close(3) = 0 [pid 875] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 875] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 878 attached [pid 878] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 868] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 878] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 868] <... futex resumed>) = 0 [pid 868] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 878] <... open resumed>) = 3 [pid 868] <... mmap resumed>) = 0x7f6fa0feb000 [pid 878] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 868] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 875] <... futex resumed>) = 0 [pid 875] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 868] <... mprotect resumed>) = 0 [pid 868] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 875] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 878] <... futex resumed>) = 1 [pid 878] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 878] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 875] <... futex resumed>) = 0 [pid 875] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 875] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 878] <... futex resumed>) = 1 [pid 878] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 868] <... clone resumed>, parent_tid=[881], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 881 [pid 874] set_robust_list(0x7f6fa0fea9e0, 24 [pid 868] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 874] <... set_robust_list resumed>) = 0 [pid 868] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 874] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 868] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 868] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 878] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 868] <... mprotect resumed>) = 0 [pid 874] <... open resumed>) = 4 [pid 875] <... futex resumed>) = 0 [pid 875] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 875] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 878] <... futex resumed>) = 1 [pid 878] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 878] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 875] <... futex resumed>) = 0 [pid 875] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 875] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 868] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 874] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 878] <... futex resumed>) = 1 [pid 878] sendfile(4, 5, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 868] <... clone resumed>, parent_tid=[882], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 882 [pid 874] <... futex resumed>) = 1 [pid 869] <... futex resumed>) = 0 [pid 878] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 869] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 875] <... futex resumed>) = 0 [pid 869] <... futex resumed>) = 0 [pid 869] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 878] <... futex resumed>) = 1 [pid 878] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 877 attached [pid 877] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 868] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 874] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 868] <... futex resumed>) = 0 [pid 868] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 874] <... mount resumed>) = 0 [pid 877] memfd_create("syzkaller", 0 [pid 874] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 877] <... memfd_create resumed>) = 6 [pid 877] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 874] <... futex resumed>) = 1 [pid 869] <... futex resumed>) = 0 [pid 869] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 874] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 873] set_robust_list(0x7f6fa0fea9e0, 24 [pid 871] set_robust_list(0x7f6fa100b9e0, 24 [pid 869] <... futex resumed>) = 0 [pid 869] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 874] <... open resumed>) = 5 [pid 874] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 873] <... set_robust_list resumed>) = 0 [pid 871] <... set_robust_list resumed>) = 0 [ 23.103603][ T861] loop3: detected capacity change from 0 to 2048 [ 23.109580][ T866] loop0: detected capacity change from 0 to 2048 ./strace-static-x86_64: Process 882 attached [pid 874] <... futex resumed>) = 1 [pid 873] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 872] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 871] memfd_create("syzkaller", 0 [pid 869] <... futex resumed>) = 0 [pid 882] set_robust_list(0x7f6fa0fea9e0, 24 [pid 874] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 873] <... open resumed>) = 3 ./strace-static-x86_64: Process 881 attached [pid 881] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 881] memfd_create("syzkaller", 0) = 3 [pid 881] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 872] <... write resumed>) = 1048576 [pid 871] <... memfd_create resumed>) = 4 [pid 869] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 874] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 882] <... set_robust_list resumed>) = 0 [pid 873] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 869] <... futex resumed>) = 0 [pid 874] openat(-1, "/proc/self/exe", O_RDONLY [pid 882] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 871] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 873] <... futex resumed>) = 1 [pid 872] munmap(0x7f6f98bca000, 1048576 [pid 870] <... futex resumed>) = 0 [pid 882] <... open resumed>) = 4 [pid 874] <... openat resumed>) = 6 [pid 873] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 872] <... munmap resumed>) = 0 [pid 871] <... mmap resumed>) = 0x7f6f98bca000 [pid 870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 869] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 882] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 874] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 873] <... mount resumed>) = 0 [pid 877] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 882] <... futex resumed>) = 1 [pid 874] <... futex resumed>) = 0 [pid 873] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 872] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 871] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 870] <... futex resumed>) = 0 [pid 869] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 868] <... futex resumed>) = 0 [pid 882] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 874] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 873] <... futex resumed>) = 0 [pid 882] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 869] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 868] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 882] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 874] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 873] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 872] <... openat resumed>) = 7 [pid 870] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 869] <... futex resumed>) = 0 [pid 868] <... futex resumed>) = 0 [pid 882] <... mount resumed>) = 0 [pid 874] sendfile(5, 6, NULL, 140737974943952 [pid 873] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 869] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 868] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 873] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 870] <... futex resumed>) = 0 [pid 882] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 873] <... open resumed>) = 5 [pid 870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 882] <... futex resumed>) = 1 [pid 873] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 872] ioctl(7, LOOP_SET_FD, 3 [pid 868] <... futex resumed>) = 0 [pid 882] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 873] <... futex resumed>) = 1 [pid 872] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 870] <... futex resumed>) = 0 [pid 868] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 882] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 881] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 873] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 872] ioctl(7, LOOP_CLR_FD [pid 870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 868] <... futex resumed>) = 0 [pid 882] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 873] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 870] <... futex resumed>) = 0 [pid 868] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 882] <... open resumed>) = 5 [pid 881] <... write resumed>) = 1048576 [pid 877] <... write resumed>) = 1048576 [pid 874] <... sendfile resumed>) = 1048576 [pid 872] <... ioctl resumed>) = 0 [pid 871] <... write resumed>) = 1048576 [pid 873] openat(-1, "/proc/self/exe", O_RDONLY [pid 870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 882] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 874] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 877] munmap(0x7f6f98bca000, 1048576) = 0 [pid 882] <... futex resumed>) = 1 [pid 874] <... futex resumed>) = 1 [pid 869] <... futex resumed>) = 0 [pid 868] <... futex resumed>) = 0 [pid 877] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 873] <... openat resumed>) = 6 [pid 882] openat(-1, "/proc/self/exe", O_RDONLY [pid 874] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 873] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 868] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 882] <... openat resumed>) = 6 [pid 873] <... futex resumed>) = 1 [pid 870] <... futex resumed>) = 0 [pid 868] <... futex resumed>) = 0 [pid 882] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 873] sendfile(5, 6, NULL, 140737974943952 [pid 870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 868] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 877] <... openat resumed>) = 7 [pid 870] <... futex resumed>) = 0 [pid 868] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 882] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 877] ioctl(7, LOOP_SET_FD, 6 [pid 882] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 873] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 868] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 882] sendfile(5, 6, NULL, 140737974943952 [pid 873] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 871] munmap(0x7f6f98bca000, 1048576 [pid 868] <... futex resumed>) = 0 [pid 881] munmap(0x7f6f98bca000, 1048576) = 0 [pid 881] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [ 23.145700][ T861] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 23.181997][ T877] loop2: detected capacity change from 0 to 2048 [pid 881] ioctl(7, LOOP_SET_FD, 3 [pid 882] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 873] <... futex resumed>) = 1 [pid 872] ioctl(7, LOOP_SET_FD, 3 [pid 871] <... munmap resumed>) = 0 [pid 870] <... futex resumed>) = 0 [pid 868] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 882] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 873] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 872] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 868] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 882] <... futex resumed>) = 0 [pid 882] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 881] <... ioctl resumed>) = 0 [pid 877] <... ioctl resumed>) = 0 [pid 872] close(7 [pid 871] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 881] close(3 [pid 877] close(6 [pid 872] <... close resumed>) = 0 [pid 871] <... openat resumed>) = 7 [pid 881] <... close resumed>) = 0 [pid 877] <... close resumed>) = 0 [pid 872] close(3 [pid 871] ioctl(7, LOOP_SET_FD, 4 [pid 881] mkdir("./bus", 0777 [pid 877] mkdir("./bus", 0777 [pid 872] <... close resumed>) = 0 [pid 871] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 881] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 877] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 872] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 871] ioctl(7, LOOP_CLR_FD [pid 869] exit_group(0 [pid 881] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 877] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 874] <... futex resumed>) = ? [pid 872] <... futex resumed>) = ? [pid 871] <... ioctl resumed>) = 0 [pid 869] <... exit_group resumed>) = ? [pid 874] +++ exited with 0 +++ [pid 872] +++ exited with 0 +++ [pid 869] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=869, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 871] ioctl(7, LOOP_SET_FD, 4 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 871] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 411] <... openat resumed>) = 3 [pid 871] close(7 [pid 411] ioctl(3, LOOP_CLR_FD [pid 871] <... close resumed>) = 0 [pid 411] <... ioctl resumed>) = 0 [pid 871] close(4 [pid 411] close(3 [pid 871] <... close resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 871] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 870] exit_group(0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 873] <... futex resumed>) = ? [pid 871] <... futex resumed>) = ? [pid 870] <... exit_group resumed>) = ? [pid 873] +++ exited with 0 +++ [pid 871] +++ exited with 0 +++ [pid 870] +++ exited with 0 +++ [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 884 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=870, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 887 [pid 861] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 861] ioctl(7, LOOP_CLR_FD) = 0 [pid 861] close(7) = 0 [pid 861] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 861] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 858] exit_group(0 [pid 862] <... futex resumed>) = ? [pid 861] <... futex resumed>) = ? [pid 858] <... exit_group resumed>) = ? [pid 862] +++ exited with 0 +++ [pid 861] +++ exited with 0 +++ ./strace-static-x86_64: Process 884 attached [pid 884] set_robust_list(0x5555564066e0, 24) = 0 [pid 884] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 884] setpgid(0, 0) = 0 [pid 884] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 884] write(3, "1000", 4) = 4 [pid 884] close(3) = 0 [pid 884] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 884] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 884] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 884] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[889], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 889 [pid 884] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 884] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 884] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [ 23.192528][ T881] loop5: detected capacity change from 0 to 2048 [ 23.202909][ T861] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.215121][ T866] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 884] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 884] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[890], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 890 [pid 884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 889 attached [pid 889] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 889] memfd_create("syzkaller", 0) = 3 [pid 889] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 889] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 890 attached ./strace-static-x86_64: Process 887 attached ) = 1048576 [pid 858] +++ exited with 0 +++ [pid 890] set_robust_list(0x7f6fa0fea9e0, 24 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=858, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 890] <... set_robust_list resumed>) = 0 [pid 887] set_robust_list(0x5555564066e0, 24 [pid 890] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 889] munmap(0x7f6f98bca000, 1048576 [pid 887] <... set_robust_list resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 890] <... open resumed>) = 4 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3 [pid 889] <... munmap resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 887] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 890] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 889] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 887] <... prctl resumed>) = 0 ./strace-static-x86_64: Process 893 attached [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 893 [pid 890] <... futex resumed>) = 1 [pid 889] <... openat resumed>) = 5 [pid 887] setpgid(0, 0 [pid 893] set_robust_list(0x5555564066e0, 24 [pid 890] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 889] ioctl(5, LOOP_SET_FD, 3 [pid 887] <... setpgid resumed>) = 0 [pid 884] <... futex resumed>) = 0 [pid 884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 893] <... set_robust_list resumed>) = 0 [pid 890] <... futex resumed>) = 0 [pid 889] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 887] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 884] <... futex resumed>) = 1 [pid 890] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 890] <... mount resumed>) = 0 [pid 889] ioctl(5, LOOP_CLR_FD [ 23.263657][ T866] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.278960][ T877] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 23.297209][ T881] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 893] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 890] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 889] <... ioctl resumed>) = 0 [pid 887] <... openat resumed>) = 3 [pid 884] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 893] setpgid(0, 0 [pid 890] <... futex resumed>) = 0 [pid 887] write(3, "1000", 4 [pid 884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 893] <... setpgid resumed>) = 0 [pid 890] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 887] <... write resumed>) = 4 [pid 884] <... futex resumed>) = 0 [pid 866] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 866] ioctl(7, LOOP_CLR_FD) = 0 [pid 866] close(7 [pid 893] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 866] <... close resumed>) = 0 [pid 890] <... open resumed>) = 6 [pid 866] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 887] close(3 [pid 884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 866] <... futex resumed>) = 0 [pid 866] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 887] <... close resumed>) = 0 [pid 893] <... openat resumed>) = 3 [pid 890] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 889] ioctl(5, LOOP_SET_FD, 3 [pid 887] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 865] exit_group(0 [pid 889] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 893] write(3, "1000", 4 [pid 890] <... futex resumed>) = 1 [pid 889] close(5 [pid 887] <... futex resumed>) = 0 [pid 884] <... futex resumed>) = 0 [pid 867] <... futex resumed>) = ? [pid 866] <... futex resumed>) = ? [pid 865] <... exit_group resumed>) = ? [pid 890] openat(-1, "/proc/self/exe", O_RDONLY [pid 889] <... close resumed>) = 0 [pid 887] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 867] +++ exited with 0 +++ [pid 866] +++ exited with 0 +++ [pid 893] <... write resumed>) = 4 [pid 890] <... openat resumed>) = 5 [pid 889] close(3 [pid 887] <... mmap resumed>) = 0x7f6fa0feb000 [pid 884] <... futex resumed>) = 0 [pid 893] close(3 [pid 890] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 889] <... close resumed>) = 0 [pid 887] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 893] <... close resumed>) = 0 [pid 893] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 890] <... futex resumed>) = 0 [pid 889] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 887] <... mprotect resumed>) = 0 [pid 884] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 893] <... futex resumed>) = 0 [pid 890] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 887] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 884] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 893] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 889] <... futex resumed>) = 0 [pid 884] <... futex resumed>) = 0 [pid 893] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 889] sendfile(6, 5, NULL, 140737974943952 [pid 887] <... clone resumed>, parent_tid=[894], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 894 [pid 884] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 893] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 887] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 894 attached [pid 894] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 894] memfd_create("syzkaller", 0) = 3 [pid 894] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 887] <... futex resumed>) = 0 [pid 887] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 893] <... clone resumed>, parent_tid=[895], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 895 [pid 887] <... futex resumed>) = 0 [pid 893] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 887] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 893] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 887] <... mmap resumed>) = 0x7f6f98bca000 [pid 893] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 887] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 893] <... mmap resumed>) = 0x7f6fa0fca000 [pid 887] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 893] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 893] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 887] <... clone resumed>, parent_tid=[896], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 896 [pid 887] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 893] <... clone resumed>, parent_tid=[897], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 897 [pid 887] <... futex resumed>) = 0 [pid 893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 887] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 897 attached [pid 897] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 897] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 895 attached ) = 3 [pid 895] set_robust_list(0x7f6fa100b9e0, 24 [pid 897] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 895] <... set_robust_list resumed>) = 0 [pid 897] <... futex resumed>) = 1 [pid 895] memfd_create("syzkaller", 0 [pid 893] <... futex resumed>) = 0 ./strace-static-x86_64: Process 896 attached [pid 897] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 895] <... memfd_create resumed>) = 4 [pid 893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 897] <... mount resumed>) = 0 [pid 896] set_robust_list(0x7f6f98bea9e0, 24 [pid 895] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 894] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 893] <... futex resumed>) = 0 [pid 897] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 896] <... set_robust_list resumed>) = 0 [pid 895] <... mmap resumed>) = 0x7f6f98bca000 [pid 893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 897] <... futex resumed>) = 0 [pid 896] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 894] <... write resumed>) = 1048576 [pid 893] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 897] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 896] <... open resumed>) = 4 [pid 893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 897] <... open resumed>) = 5 [pid 896] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 893] <... futex resumed>) = 0 [pid 897] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 896] <... futex resumed>) = 1 [pid 894] munmap(0x7f6f98beb000, 1048576 [pid 893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 887] <... futex resumed>) = 0 [pid 877] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 897] <... futex resumed>) = 0 [pid 896] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 893] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 887] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 877] ioctl(7, LOOP_CLR_FD [pid 897] openat(-1, "/proc/self/exe", O_RDONLY [pid 896] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 887] <... futex resumed>) = 0 [pid 897] <... openat resumed>) = 6 [pid 896] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 893] <... futex resumed>) = 0 [pid 887] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 877] <... ioctl resumed>) = 0 [pid 897] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 896] <... mount resumed>) = 0 [pid 893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 889] <... sendfile resumed>) = 1048576 [pid 877] close(7 [pid 897] <... futex resumed>) = 0 [pid 896] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 893] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 889] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 877] <... close resumed>) = 0 [pid 897] sendfile(5, 6, NULL, 140737974943952 [pid 896] <... futex resumed>) = 1 [pid 893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 889] <... futex resumed>) = 1 [pid 887] <... futex resumed>) = 0 [pid 884] <... futex resumed>) = 0 [pid 877] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 897] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 896] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 893] <... futex resumed>) = 0 [pid 887] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 877] <... futex resumed>) = 0 [pid 897] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 896] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 887] <... futex resumed>) = 0 [pid 877] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 875] exit_group(0 [pid 897] <... futex resumed>) = 0 [pid 896] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 893] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 889] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 887] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 884] exit_group(0 [pid 878] <... futex resumed>) = ? [pid 877] <... futex resumed>) = ? [pid 875] <... exit_group resumed>) = ? [pid 897] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 894] <... munmap resumed>) = 0 [pid 890] <... futex resumed>) = ? [pid 889] <... futex resumed>) = ? [pid 884] <... exit_group resumed>) = ? [pid 878] +++ exited with 0 +++ [pid 877] +++ exited with 0 +++ [pid 890] +++ exited with 0 +++ [pid 889] +++ exited with 0 +++ [pid 884] +++ exited with 0 +++ [pid 894] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=884, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 881] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 411] <... restart_syscall resumed>) = 0 [pid 881] ioctl(7, LOOP_CLR_FD) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 881] close(7 [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 881] <... close resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 898 [pid 881] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 898 attached ) = 0 [pid 881] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 895] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 868] exit_group(0 [pid 898] set_robust_list(0x5555564066e0, 24 [pid 882] <... futex resumed>) = ? [pid 868] <... exit_group resumed>) = ? [pid 882] +++ exited with 0 +++ [pid 881] <... futex resumed>) = 230 [pid 898] <... set_robust_list resumed>) = 0 [pid 898] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 898] setpgid(0, 0) = 0 [pid 898] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 898] write(3, "1000", 4) = 4 [pid 898] close(3) = 0 [pid 898] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 898] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 898] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 895] <... write resumed>) = 1048576 [pid 898] <... mprotect resumed>) = 0 [ 23.297396][ T877] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.340382][ T881] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 895] munmap(0x7f6f98bca000, 1048576) = 0 [pid 895] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 7 [pid 895] ioctl(7, LOOP_SET_FD, 4 [pid 896] <... open resumed>) = 5 [pid 896] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 887] <... futex resumed>) = 0 [pid 896] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 887] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 896] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 887] <... futex resumed>) = 0 [pid 896] openat(-1, "/proc/self/exe", O_RDONLY [pid 887] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 896] <... openat resumed>) = 7 [pid 896] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 887] <... futex resumed>) = 0 [pid 896] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 887] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 896] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 887] <... futex resumed>) = 0 [pid 896] sendfile(5, 7, NULL, 140737974943952 [pid 887] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 896] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 896] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 887] <... futex resumed>) = 0 [pid 896] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 898] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 894] <... openat resumed>) = 6 [pid 865] +++ exited with 0 +++ [pid 894] ioctl(6, LOOP_SET_FD, 3./strace-static-x86_64: Process 899 attached [pid 895] <... ioctl resumed>) = 0 [pid 898] <... clone resumed>, parent_tid=[899], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 899 [pid 895] close(4 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=865, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 898] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 895] <... close resumed>) = 0 [pid 898] <... futex resumed>) = 0 [pid 895] mkdir("./bus", 0777 [pid 899] set_robust_list(0x7f6fa100b9e0, 24 [pid 898] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 895] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 899] <... set_robust_list resumed>) = 0 [pid 898] <... futex resumed>) = 0 [pid 895] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 407] <... openat resumed>) = 3 [pid 899] memfd_create("syzkaller", 0 [pid 898] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 899] <... memfd_create resumed>) = 3 [pid 898] <... mmap resumed>) = 0x7f6fa0fca000 [pid 894] <... ioctl resumed>) = 0 [pid 407] <... ioctl resumed>) = 0 [pid 899] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 898] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 407] close(3 [pid 899] <... mmap resumed>) = 0x7f6f98bca000 [pid 898] <... mprotect resumed>) = 0 [pid 894] close(3 [pid 407] <... close resumed>) = 0 [pid 898] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 894] <... close resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 894] mkdir("./bus", 0777 [pid 898] <... clone resumed>, parent_tid=[900], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 900 [pid 894] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 898] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 901 [pid 898] <... futex resumed>) = 0 [pid 894] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 898] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 901 attached ./strace-static-x86_64: Process 900 attached [pid 899] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 901] set_robust_list(0x5555564066e0, 24 [pid 900] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 900] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 900] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 900] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 899] <... write resumed>) = 1048576 [pid 899] munmap(0x7f6f98bca000, 1048576) = 0 [pid 899] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 5 [pid 899] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 899] ioctl(5, LOOP_CLR_FD) = 0 [pid 901] <... set_robust_list resumed>) = 0 [pid 901] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 901] setpgid(0, 0) = 0 [pid 901] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 899] ioctl(5, LOOP_SET_FD, 3 [pid 901] write(3, "1000", 4 [pid 899] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 901] <... write resumed>) = 4 [pid 899] close(5 [pid 881] +++ exited with 0 +++ [pid 868] +++ exited with 0 +++ [pid 901] close(3 [pid 899] <... close resumed>) = 0 [pid 901] <... close resumed>) = 0 [pid 899] close(3 [pid 901] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 898] <... futex resumed>) = 0 [pid 898] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=868, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 900] <... futex resumed>) = 0 [pid 898] <... futex resumed>) = 1 [pid 900] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 898] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 900] <... mount resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 900] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... openat resumed>) = 3 [pid 900] <... futex resumed>) = 1 [pid 898] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 900] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 898] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 900] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 898] <... futex resumed>) = 0 [pid 412] close(3 [pid 900] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 898] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... close resumed>) = 0 [pid 900] <... open resumed>) = 3 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 900] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 898] <... futex resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 904 [pid 900] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 898] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 900] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 898] <... futex resumed>) = 0 [pid 900] openat(-1, "/proc/self/exe", O_RDONLY [pid 898] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 900] <... openat resumed>) = 5 [pid 900] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 898] <... futex resumed>) = 0 [pid 900] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 898] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 900] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 898] <... futex resumed>) = 0 [pid 900] sendfile(3, 5, NULL, 140737974943952 [pid 898] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 901] <... futex resumed>) = 0 [pid 900] <... sendfile resumed>) = 1048576 [pid 901] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 900] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 901] <... mmap resumed>) = 0x7f6fa0feb000 [pid 900] <... futex resumed>) = 1 [pid 898] <... futex resumed>) = 0 [pid 901] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [ 23.368959][ T895] loop3: detected capacity change from 0 to 2048 [ 23.374245][ T894] loop1: detected capacity change from 0 to 2048 [ 23.387837][ T895] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 900] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 899] <... close resumed>) = 0 ./strace-static-x86_64: Process 904 attached [pid 901] <... mprotect resumed>) = 0 [pid 875] +++ exited with 0 +++ [pid 904] set_robust_list(0x5555564066e0, 24) = 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=875, si_uid=0, si_status=0, si_utime=1, si_stime=4} --- [pid 904] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 904] <... prctl resumed>) = 0 [pid 904] setpgid(0, 0) = 0 [pid 904] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 904] write(3, "1000", 4) = 4 [pid 904] close(3) = 0 [pid 904] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 409] <... restart_syscall resumed>) = 0 [pid 904] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 904] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 904] <... mprotect resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 904] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 904] <... clone resumed>, parent_tid=[907], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 907 [pid 409] close(3 [pid 904] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... close resumed>) = 0 [pid 904] <... futex resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 904] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 908 [pid 904] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 904] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 904] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[909], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 909 [pid 904] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 904] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 908 attached [pid 908] set_robust_list(0x5555564066e0, 24) = 0 [pid 908] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 908] setpgid(0, 0) = 0 [pid 908] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 908] write(3, "1000", 4) = 4 [pid 908] close(3) = 0 [pid 908] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 908] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 908] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 908] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 909 attached [pid 909] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 909] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 908] <... clone resumed>, parent_tid=[910], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 910 [pid 908] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 908] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 909] <... open resumed>) = 3 [pid 908] <... futex resumed>) = 0 [pid 908] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 908] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 908] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 904] <... futex resumed>) = 0 [pid 904] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 904] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 909] <... futex resumed>) = 1 [pid 909] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 908] <... clone resumed>, parent_tid=[911], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 911 [pid 908] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 908] <... futex resumed>) = 0 [pid 904] <... futex resumed>) = 0 [pid 904] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 904] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 908] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 909] <... futex resumed>) = 1 [pid 909] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 901] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 909] <... open resumed>) = 4 [pid 909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 901] <... clone resumed>, parent_tid=[912], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 912 [pid 899] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 898] exit_group(0 [pid 900] <... futex resumed>) = ? [pid 898] <... exit_group resumed>) = ? [pid 900] +++ exited with 0 +++ [pid 904] <... futex resumed>) = 0 [pid 904] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 904] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 909] <... futex resumed>) = 1 [pid 909] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 904] <... futex resumed>) = 0 [pid 904] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 904] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 909] <... futex resumed>) = 1 [pid 909] sendfile(4, 5, NULL, 140737974943952) = -1 ENOSPC (No space left on device) ./strace-static-x86_64: Process 907 attached [pid 907] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 904] <... futex resumed>) = 0 [pid 907] memfd_create("syzkaller", 0 [pid 909] <... futex resumed>) = 1 [pid 909] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 907] <... memfd_create resumed>) = 6 [pid 907] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 912 attached [pid 912] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 912] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 911 attached [pid 911] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 911] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 911] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 908] <... futex resumed>) = 0 [pid 908] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 908] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 911] <... futex resumed>) = 1 [pid 911] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 901] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 899] <... futex resumed>) = ? [pid 901] <... futex resumed>) = 1 [pid 912] <... futex resumed>) = 0 [pid 912] memfd_create("syzkaller", 0) = 3 [pid 912] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 901] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 895] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 895] ioctl(7, LOOP_CLR_FD) = 0 [pid 895] close(7) = 0 [pid 895] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 899] +++ exited with 0 +++ [pid 898] +++ exited with 0 +++ [pid 895] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 901] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=898, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 901] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 901] <... mmap resumed>) = 0x7f6f98bca000 ./strace-static-x86_64: Process 910 attached [pid 911] <... mount resumed>) = 0 [pid 901] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 893] exit_group(0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 911] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 910] set_robust_list(0x7f6fa100b9e0, 24 [pid 901] <... mprotect resumed>) = 0 [pid 897] <... futex resumed>) = ? [pid 895] <... futex resumed>) = ? [pid 893] <... exit_group resumed>) = ? [pid 411] <... openat resumed>) = 3 [pid 911] <... futex resumed>) = 1 [pid 910] <... set_robust_list resumed>) = 0 [pid 908] <... futex resumed>) = 0 [pid 901] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 897] +++ exited with 0 +++ [pid 895] +++ exited with 0 +++ [pid 893] +++ exited with 0 +++ [pid 411] ioctl(3, LOOP_CLR_FD [pid 911] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 910] memfd_create("syzkaller", 0 [pid 908] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 907] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 411] <... ioctl resumed>) = 0 [pid 911] <... open resumed>) = 5 [pid 910] <... memfd_create resumed>) = 4 [pid 908] <... futex resumed>) = 0 [pid 901] <... clone resumed>, parent_tid=[913], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 913 [pid 411] close(3 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=893, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 908] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 901] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 914 [pid 901] <... futex resumed>) = 0 [pid 912] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 911] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 910] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 907] <... write resumed>) = 1048576 [pid 901] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 894] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 410] <... openat resumed>) = 3 [pid 911] <... futex resumed>) = 1 [pid 910] <... mmap resumed>) = 0x7f6f98bca000 [pid 908] <... futex resumed>) = 0 [pid 894] ioctl(6, LOOP_CLR_FD./strace-static-x86_64: Process 914 attached [pid 911] openat(-1, "/proc/self/exe", O_RDONLY [pid 910] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 908] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 894] <... ioctl resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 914] set_robust_list(0x5555564066e0, 24 [pid 911] <... openat resumed>) = 6 [pid 908] <... futex resumed>) = 0 [pid 894] close(6 [pid 914] <... set_robust_list resumed>) = 0 [pid 911] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 908] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 894] <... close resumed>) = 0 [pid 410] <... ioctl resumed>) = 0 [pid 911] <... futex resumed>) = 0 [pid 908] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 911] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 908] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 894] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 911] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 908] <... futex resumed>) = 0 [pid 911] sendfile(5, 6, NULL, 140737974943952 [pid 908] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 894] <... futex resumed>) = 0 [pid 914] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 911] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 410] close(3./strace-static-x86_64: Process 913 attached [pid 914] <... prctl resumed>) = 0 [pid 911] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 894] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 887] exit_group(0 [pid 914] setpgid(0, 0 [pid 913] set_robust_list(0x7f6f98bea9e0, 24 [pid 911] <... futex resumed>) = 1 [pid 908] <... futex resumed>) = 0 [pid 907] munmap(0x7f6f98bca000, 1048576 [pid 896] <... futex resumed>) = ? [pid 894] <... futex resumed>) = ? [pid 887] <... exit_group resumed>) = ? [pid 410] <... close resumed>) = 0 [pid 914] <... setpgid resumed>) = 0 [pid 913] <... set_robust_list resumed>) = 0 [pid 912] <... write resumed>) = 1048576 [pid 911] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 907] <... munmap resumed>) = 0 [pid 896] +++ exited with 0 +++ [pid 914] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 913] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 907] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 913] <... open resumed>) = 4 [pid 907] <... openat resumed>) = 7 [pid 913] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 907] ioctl(7, LOOP_SET_FD, 6 [pid 914] <... openat resumed>) = 3 [pid 913] <... futex resumed>) = 1 [pid 901] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 915 [pid 914] write(3, "1000", 4 [pid 901] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 914] <... write resumed>) = 4 [pid 901] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 914] close(3 [pid 913] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 910] <... write resumed>) = 1048576 [ 23.410829][ T895] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.413674][ T894] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 23.434971][ T894] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) ./strace-static-x86_64: Process 915 attached [pid 914] <... close resumed>) = 0 [pid 913] <... mount resumed>) = 0 [pid 912] munmap(0x7f6f98beb000, 1048576 [pid 915] set_robust_list(0x5555564066e0, 24 [pid 914] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 915] <... set_robust_list resumed>) = 0 [pid 914] <... futex resumed>) = 0 [pid 912] <... munmap resumed>) = 0 [pid 915] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 914] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 912] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 915] <... prctl resumed>) = 0 [pid 914] <... mmap resumed>) = 0x7f6fa0feb000 [pid 912] <... openat resumed>) = 5 [pid 915] setpgid(0, 0 [pid 914] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 912] ioctl(5, LOOP_SET_FD, 3 [pid 915] <... setpgid resumed>) = 0 [pid 914] <... mprotect resumed>) = 0 [pid 913] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 910] munmap(0x7f6f98bca000, 1048576 [pid 907] <... ioctl resumed>) = 0 [pid 913] <... futex resumed>) = 1 [pid 910] <... munmap resumed>) = 0 [pid 907] close(6 [pid 901] <... futex resumed>) = 0 [pid 913] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 910] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 907] <... close resumed>) = 0 [pid 901] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 913] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 910] <... openat resumed>) = 7 [pid 907] mkdir("./bus", 0777 [pid 901] <... futex resumed>) = 0 [pid 913] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 910] ioctl(7, LOOP_SET_FD, 4 [pid 907] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 901] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 915] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 914] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 912] <... ioctl resumed>) = 0 [pid 915] <... openat resumed>) = 3 [pid 915] write(3, "1000", 4 [pid 914] <... clone resumed>, parent_tid=[916], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 916 [pid 912] close(3 [pid 915] <... write resumed>) = 4 [pid 914] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 915] close(3 [pid 914] <... futex resumed>) = 0 [pid 912] <... close resumed>) = 0 [pid 915] <... close resumed>) = 0 [pid 914] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 915] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 914] <... futex resumed>) = 0 [pid 912] mkdir("./bus", 0777 [pid 915] <... futex resumed>) = 0 [pid 914] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 915] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 914] <... mmap resumed>) = 0x7f6fa0fca000 [pid 912] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 915] <... mmap resumed>) = 0x7f6fa0feb000 [pid 914] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 916 attached [pid 915] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 914] <... mprotect resumed>) = 0 [pid 913] <... open resumed>) = 6 [pid 912] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 910] <... ioctl resumed>) = 0 [pid 907] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 916] set_robust_list(0x7f6fa100b9e0, 24 [pid 915] <... mprotect resumed>) = 0 [pid 914] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 913] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 910] close(4 [pid 916] <... set_robust_list resumed>) = 0 [pid 915] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 913] <... futex resumed>) = 1 [pid 901] <... futex resumed>) = 0 [pid 916] memfd_create("syzkaller", 0 [pid 913] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 910] <... close resumed>) = 0 [pid 901] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 918 attached ./strace-static-x86_64: Process 917 attached [pid 916] <... memfd_create resumed>) = 3 [pid 915] <... clone resumed>, parent_tid=[918], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 918 [pid 914] <... clone resumed>, parent_tid=[917], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 917 [pid 913] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 910] mkdir("./bus", 0777 [pid 901] <... futex resumed>) = 0 [pid 916] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 913] openat(-1, "/proc/self/exe", O_RDONLY [pid 910] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 901] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 918] set_robust_list(0x7f6fa100b9e0, 24 [pid 917] set_robust_list(0x7f6fa0fea9e0, 24 [pid 916] <... mmap resumed>) = 0x7f6f98bca000 [pid 915] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 913] <... openat resumed>) = 3 [pid 910] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 918] <... set_robust_list resumed>) = 0 [pid 917] <... set_robust_list resumed>) = 0 [pid 915] <... futex resumed>) = 0 [pid 914] <... futex resumed>) = 0 [pid 918] memfd_create("syzkaller", 0 [pid 917] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 915] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 918] <... memfd_create resumed>) = 3 [pid 917] <... open resumed>) = 4 [pid 915] <... futex resumed>) = 0 [pid 918] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 917] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 916] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 915] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 913] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 918] <... mmap resumed>) = 0x7f6f98beb000 [pid 917] <... futex resumed>) = 1 [pid 915] <... mmap resumed>) = 0x7f6f98bca000 [pid 914] <... futex resumed>) = 0 [pid 913] <... futex resumed>) = 1 [pid 901] <... futex resumed>) = 0 [pid 917] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 915] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 913] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 901] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 918] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 917] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 916] <... write resumed>) = 1048576 [pid 915] <... mprotect resumed>) = 0 [pid 914] <... futex resumed>) = 0 [pid 918] <... write resumed>) = 1048576 [pid 917] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 915] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 917] <... mount resumed>) = 0 [pid 917] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 915] <... clone resumed>, parent_tid=[922], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 922 [pid 917] <... futex resumed>) = 1 [pid 915] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 914] <... futex resumed>) = 0 [pid 917] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 916] munmap(0x7f6f98bca000, 1048576 [pid 915] <... futex resumed>) = 0 [pid 914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 913] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 23.478686][ T907] loop5: detected capacity change from 0 to 2048 [ 23.483693][ T912] loop0: detected capacity change from 0 to 2048 [ 23.486778][ T910] loop2: detected capacity change from 0 to 2048 [ 23.508262][ T907] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 901] <... futex resumed>) = 0 [pid 917] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 915] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 914] <... futex resumed>) = 0 [pid 917] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 917] <... open resumed>) = 5 [pid 917] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 914] <... futex resumed>) = 0 [pid 917] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 917] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 914] <... futex resumed>) = 0 [pid 917] openat(-1, "/proc/self/exe", O_RDONLY [pid 916] <... munmap resumed>) = 0 [pid 914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 913] sendfile(6, 3, NULL, 140737974943952 [pid 901] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 917] <... openat resumed>) = 6 [pid 916] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 918] munmap(0x7f6f98beb000, 1048576 [pid 917] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 918] <... munmap resumed>) = 0 [pid 917] <... futex resumed>) = 1 [pid 914] <... futex resumed>) = 0 [pid 916] <... openat resumed>) = 7 [pid 918] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 917] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 917] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 916] ioctl(7, LOOP_SET_FD, 3 [pid 914] <... futex resumed>) = 0 [pid 917] sendfile(5, 6, NULL, 140737974943952 [pid 916] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 916] ioctl(7, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 922 attached [pid 917] <... sendfile resumed>) = 1048576 [pid 913] <... sendfile resumed>) = 1048576 [pid 922] set_robust_list(0x7f6f98bea9e0, 24 [pid 917] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 922] <... set_robust_list resumed>) = 0 [pid 917] <... futex resumed>) = 1 [pid 914] <... futex resumed>) = 0 [pid 922] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 917] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 922] <... open resumed>) = 5 [pid 922] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 915] <... futex resumed>) = 0 [pid 922] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 915] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 922] <... mount resumed>) = 0 [pid 915] <... futex resumed>) = 0 [pid 922] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 915] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 922] <... futex resumed>) = 0 [pid 915] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 922] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 915] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 915] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 913] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 913] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 916] ioctl(7, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 916] close(7) = 0 [pid 916] close(3) = 0 [pid 916] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 916] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 914] exit_group(0 [pid 917] <... futex resumed>) = ? [pid 914] <... exit_group resumed>) = ? [pid 917] +++ exited with 0 +++ [pid 916] <... futex resumed>) = ? [pid 916] +++ exited with 0 +++ [pid 914] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=914, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 926 [pid 901] <... futex resumed>) = 0 [pid 907] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 907] ioctl(7, LOOP_CLR_FD) = 0 [pid 907] close(7) = 0 [pid 907] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 907] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 926 attached [pid 926] set_robust_list(0x5555564066e0, 24) = 0 [pid 926] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 926] setpgid(0, 0) = 0 [ 23.521849][ T907] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.537388][ T920] EXT4-fs warning (device loop0): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 23.540352][ T910] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 23.561597][ T912] EXT4-fs (loop0): get root inode failed [ 23.566068][ T910] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 926] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 926] write(3, "1000", 4) = 4 [pid 926] close(3) = 0 [pid 926] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 926] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 904] exit_group(0 [pid 909] <... futex resumed>) = ? [pid 907] <... futex resumed>) = ? [pid 904] <... exit_group resumed>) = ? [pid 909] +++ exited with 0 +++ [pid 907] +++ exited with 0 +++ [pid 926] <... mmap resumed>) = 0x7f6fa0feb000 [pid 904] +++ exited with 0 +++ [pid 926] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=904, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 912] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 926] <... mprotect resumed>) = 0 [pid 412] <... ioctl resumed>) = 0 [pid 412] close(3) = 0 [pid 926] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 912] ioctl(5, LOOP_CLR_FD) = 0 [pid 912] close(5 [pid 926] <... clone resumed>, parent_tid=[927], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 927 [pid 912] <... close resumed>) = 0 ./strace-static-x86_64: Process 927 attached [pid 926] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 912] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 910] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 927] set_robust_list(0x7f6fa100b9e0, 24 [pid 926] <... futex resumed>) = 0 [pid 912] <... futex resumed>) = 0 [pid 910] ioctl(7, LOOP_CLR_FD./strace-static-x86_64: Process 928 attached [pid 927] <... set_robust_list resumed>) = 0 [pid 912] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 926] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 910] <... ioctl resumed>) = 0 [pid 926] <... futex resumed>) = 0 [pid 910] close(7 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 928 [pid 927] memfd_create("syzkaller", 0 [pid 926] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 928] set_robust_list(0x5555564066e0, 24 [pid 927] <... memfd_create resumed>) = 3 [pid 910] <... close resumed>) = 0 [pid 926] <... mmap resumed>) = 0x7f6fa0fca000 [pid 910] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 928] <... set_robust_list resumed>) = 0 [pid 927] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 926] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 910] <... futex resumed>) = 0 [pid 908] exit_group(0 [pid 901] exit_group(0 [pid 926] <... mprotect resumed>) = 0 [pid 928] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 927] <... mmap resumed>) = 0x7f6f98bca000 [pid 922] <... open resumed>) = 6 [pid 918] <... openat resumed>) = 4 [pid 913] <... futex resumed>) = ? [pid 912] <... futex resumed>) = ? [pid 911] <... futex resumed>) = ? [pid 908] <... exit_group resumed>) = ? [pid 901] <... exit_group resumed>) = ? [pid 894] +++ exited with 0 +++ [pid 887] +++ exited with 0 +++ [pid 926] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 922] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 918] ioctl(4, LOOP_SET_FD, 3 [pid 913] +++ exited with 0 +++ [pid 912] +++ exited with 0 +++ [pid 911] +++ exited with 0 +++ [pid 910] +++ exited with 0 +++ [pid 922] <... futex resumed>) = 1 [pid 915] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=887, si_uid=0, si_status=0, si_utime=0, si_stime=6} --- [pid 922] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 915] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 922] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 915] <... futex resumed>) = 0 [pid 408] <... restart_syscall resumed>) = 0 [pid 922] openat(-1, "/proc/self/exe", O_RDONLY [pid 915] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 922] <... openat resumed>) = 7 [pid 922] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 922] <... futex resumed>) = 1 [pid 915] <... futex resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 922] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 915] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [ 23.567630][ T912] EXT4-fs (loop0): mount failed [pid 408] ioctl(3, LOOP_CLR_FD [pid 922] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 915] <... futex resumed>) = 0 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 922] sendfile(6, 7, NULL, 140737974943952 [pid 915] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] close(3 [pid 922] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 408] <... close resumed>) = 0 [pid 922] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 922] <... futex resumed>) = 1 [pid 915] <... futex resumed>) = 0 [pid 922] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 930 [pid 928] <... prctl resumed>) = 0 [pid 928] setpgid(0, 0) = 0 [pid 928] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 928] write(3, "1000", 4) = 4 [pid 928] close(3 [pid 926] <... clone resumed>, parent_tid=[929], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 929 [pid 928] <... close resumed>) = 0 [pid 926] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 928] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 926] <... futex resumed>) = 0 [pid 918] <... ioctl resumed>) = 0 [pid 928] <... futex resumed>) = 0 [pid 926] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 918] close(3./strace-static-x86_64: Process 930 attached ./strace-static-x86_64: Process 929 attached [pid 928] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 918] <... close resumed>) = 0 [pid 930] set_robust_list(0x5555564066e0, 24 [pid 929] set_robust_list(0x7f6fa0fea9e0, 24 [pid 918] mkdir("./bus", 0777 [pid 930] <... set_robust_list resumed>) = 0 [pid 929] <... set_robust_list resumed>) = 0 [pid 918] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 928] <... mmap resumed>) = 0x7f6fa0feb000 [pid 930] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 929] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 918] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 930] <... prctl resumed>) = 0 [pid 929] <... open resumed>) = 4 [pid 928] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 930] setpgid(0, 0 [pid 929] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 930] <... setpgid resumed>) = 0 [pid 929] <... futex resumed>) = 1 [pid 928] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 926] <... futex resumed>) = 0 [pid 930] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 929] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 927] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 926] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 930] <... openat resumed>) = 3 [pid 929] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 926] <... futex resumed>) = 0 [pid 930] write(3, "1000", 4 [pid 929] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 928] <... clone resumed>, parent_tid=[931], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 931 [pid 926] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 930] <... write resumed>) = 4 [pid 929] <... mount resumed>) = 0 [pid 930] close(3 [pid 929] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 928] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 930] <... close resumed>) = 0 [pid 929] <... futex resumed>) = 1 [pid 926] <... futex resumed>) = 0 [pid 928] <... futex resumed>) = 0 [pid 930] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 929] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 928] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 926] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 930] <... futex resumed>) = 0 [pid 929] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 926] <... futex resumed>) = 0 [pid 930] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 929] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 928] <... futex resumed>) = 0 [pid 926] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 930] <... mmap resumed>) = 0x7f6fa0feb000 [pid 929] <... open resumed>) = 5 [pid 928] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 930] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 929] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 930] <... mprotect resumed>) = 0 [pid 929] <... futex resumed>) = 1 [pid 928] <... mmap resumed>) = 0x7f6fa0fca000 [pid 926] <... futex resumed>) = 0 [pid 930] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 929] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 928] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 926] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 929] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 928] <... mprotect resumed>) = 0 [pid 926] <... futex resumed>) = 0 [pid 930] <... clone resumed>, parent_tid=[933], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 933 [pid 929] openat(-1, "/proc/self/exe", O_RDONLY [pid 928] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 926] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 930] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 929] <... openat resumed>) = 6 [pid 930] <... futex resumed>) = 0 [pid 929] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 928] <... clone resumed>, parent_tid=[934], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 934 [pid 930] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 929] <... futex resumed>) = 1 [pid 928] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 926] <... futex resumed>) = 0 [pid 930] <... futex resumed>) = 0 [pid 929] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 928] <... futex resumed>) = 0 [pid 926] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 930] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 929] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 928] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 926] <... futex resumed>) = 0 [pid 930] <... mmap resumed>) = 0x7f6fa0fca000 [pid 929] sendfile(5, 6, NULL, 140737974943952 [pid 926] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 930] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 930] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[935], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 935 ./strace-static-x86_64: Process 931 attached [pid 930] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 931] set_robust_list(0x7f6fa100b9e0, 24 [pid 930] <... futex resumed>) = 0 [pid 931] <... set_robust_list resumed>) = 0 [pid 930] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 931] memfd_create("syzkaller", 0) = 3 [pid 931] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 929] <... sendfile resumed>) = 1048576 [pid 929] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 926] <... futex resumed>) = 0 [pid 929] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 935 attached ./strace-static-x86_64: Process 934 attached ./strace-static-x86_64: Process 933 attached [pid 927] <... write resumed>) = 1048576 [pid 935] set_robust_list(0x7f6fa0fea9e0, 24 [pid 934] set_robust_list(0x7f6fa0fea9e0, 24 [pid 933] set_robust_list(0x7f6fa100b9e0, 24 [pid 927] munmap(0x7f6f98bca000, 1048576 [pid 935] <... set_robust_list resumed>) = 0 [pid 934] <... set_robust_list resumed>) = 0 [pid 933] <... set_robust_list resumed>) = 0 [pid 927] <... munmap resumed>) = 0 [pid 935] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 934] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 933] memfd_create("syzkaller", 0 [pid 927] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 935] <... open resumed>) = 3 [pid 934] <... open resumed>) = 4 [pid 933] <... memfd_create resumed>) = 4 [pid 931] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 927] <... openat resumed>) = 7 [pid 935] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 934] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 933] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 927] ioctl(7, LOOP_SET_FD, 3 [pid 935] <... futex resumed>) = 1 [pid 934] <... futex resumed>) = 1 [pid 933] <... mmap resumed>) = 0x7f6f98bca000 [pid 928] <... futex resumed>) = 0 [pid 927] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 935] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 934] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 933] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 928] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 927] ioctl(7, LOOP_CLR_FD [pid 934] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 928] <... futex resumed>) = 0 [pid 927] <... ioctl resumed>) = 0 [pid 934] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 928] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 934] <... mount resumed>) = 0 [pid 934] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 908] +++ exited with 0 +++ [pid 934] <... futex resumed>) = 1 [pid 928] <... futex resumed>) = 0 [pid 927] ioctl(7, LOOP_SET_FD, 3 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=908, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 934] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 928] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 927] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 934] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 928] <... futex resumed>) = 0 [pid 927] close(7 [pid 409] <... restart_syscall resumed>) = 0 [pid 934] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 928] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 927] <... close resumed>) = 0 [pid 934] <... open resumed>) = 5 [pid 933] <... write resumed>) = 1048576 [pid 927] close(3 [pid 934] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 927] <... close resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 934] <... futex resumed>) = 1 [pid 928] <... futex resumed>) = 0 [pid 927] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 934] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 930] <... futex resumed>) = 0 [pid 928] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 927] <... futex resumed>) = 0 [pid 934] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 930] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 928] <... futex resumed>) = 0 [pid 927] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 935] <... futex resumed>) = 0 [pid 934] openat(-1, "/proc/self/exe", O_RDONLY [pid 930] <... futex resumed>) = 1 [pid 928] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 926] exit_group(0 [pid 935] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 934] <... openat resumed>) = 6 [pid 930] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 929] <... futex resumed>) = ? [pid 927] <... futex resumed>) = ? [pid 926] <... exit_group resumed>) = ? [pid 935] <... mount resumed>) = 0 [pid 934] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 929] +++ exited with 0 +++ [pid 927] +++ exited with 0 +++ [pid 935] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 934] <... futex resumed>) = 1 [pid 928] <... futex resumed>) = 0 [pid 935] <... futex resumed>) = 1 [pid 934] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 930] <... futex resumed>) = 0 [pid 928] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 926] +++ exited with 0 +++ [pid 935] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 934] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 930] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 928] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=926, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 935] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 23.604038][ T918] loop3: detected capacity change from 0 to 2048 [ 23.630113][ T918] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 934] sendfile(5, 6, NULL, 140737974943952 [pid 931] <... write resumed>) = 1048576 [pid 930] <... futex resumed>) = 0 [pid 928] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 935] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 934] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 930] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... restart_syscall resumed>) = 0 [pid 935] <... open resumed>) = 5 [pid 934] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 935] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 934] <... futex resumed>) = 1 [pid 933] munmap(0x7f6f98bca000, 1048576 [pid 928] <... futex resumed>) = 0 [pid 935] <... futex resumed>) = 1 [pid 934] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 933] <... munmap resumed>) = 0 [pid 930] <... futex resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 935] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 933] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 930] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... openat resumed>) = 3 [pid 935] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 933] <... openat resumed>) = 6 [pid 930] <... futex resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 935] openat(-1, "/proc/self/exe", O_RDONLY [pid 933] ioctl(6, LOOP_SET_FD, 4 [pid 930] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... ioctl resumed>) = 0 [pid 935] <... openat resumed>) = 7 [pid 931] munmap(0x7f6f98bca000, 1048576) = 0 [pid 931] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 931] ioctl(7, LOOP_SET_FD, 3 [pid 935] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 933] <... ioctl resumed>) = 0 [pid 411] close(3 [pid 935] <... futex resumed>) = 1 [pid 933] close(4 [pid 930] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 935] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 933] <... close resumed>) = 0 [pid 930] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 935] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 933] mkdir("./bus", 0777 [pid 930] <... futex resumed>) = 0 [pid 935] sendfile(5, 7, NULL, 140737974943952 [pid 933] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 930] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 937 ./strace-static-x86_64: Process 937 attached [pid 931] <... ioctl resumed>) = 0 [pid 918] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 937] set_robust_list(0x5555564066e0, 24 [pid 931] close(3 [pid 918] ioctl(4, LOOP_CLR_FD [pid 937] <... set_robust_list resumed>) = 0 [pid 931] <... close resumed>) = 0 [pid 918] <... ioctl resumed>) = 0 [pid 937] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 931] mkdir("./bus", 0777 [pid 918] close(4 [pid 937] <... prctl resumed>) = 0 [pid 931] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 918] <... close resumed>) = 0 [pid 937] setpgid(0, 0 [pid 931] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 918] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 937] <... setpgid resumed>) = 0 [pid 918] <... futex resumed>) = 0 [pid 937] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 918] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 915] exit_group(0 [pid 937] <... openat resumed>) = 3 [pid 937] write(3, "1000", 4 [pid 922] <... futex resumed>) = ? [pid 918] <... futex resumed>) = ? [pid 915] <... exit_group resumed>) = ? [pid 937] <... write resumed>) = 4 [pid 922] +++ exited with 0 +++ [pid 918] +++ exited with 0 +++ [pid 937] close(3) = 0 [pid 937] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 937] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 937] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 937] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 933] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 935] <... sendfile resumed>) = 1048576 [pid 937] <... clone resumed>, parent_tid=[938], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 938 [pid 935] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 937] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 937] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 937] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 937] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 937] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 935] <... futex resumed>) = 1 [pid 930] <... futex resumed>) = 0 ./strace-static-x86_64: Process 939 attached ./strace-static-x86_64: Process 938 attached [pid 937] <... clone resumed>, parent_tid=[939], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 939 [pid 937] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 937] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 935] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 939] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 939] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 939] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 937] <... futex resumed>) = 0 [pid 939] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 937] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 939] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 937] <... futex resumed>) = 0 [pid 939] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 937] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 939] <... mount resumed>) = 0 [pid 939] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 937] <... futex resumed>) = 0 [pid 939] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 937] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 939] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 937] <... futex resumed>) = 0 [pid 939] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 937] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 939] <... open resumed>) = 4 [pid 939] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 937] <... futex resumed>) = 0 [pid 939] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 937] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 939] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 937] <... futex resumed>) = 0 [pid 939] openat(-1, "/proc/self/exe", O_RDONLY [pid 937] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 939] <... openat resumed>) = 5 [pid 938] set_robust_list(0x7f6fa100b9e0, 24 [pid 933] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 901] +++ exited with 0 +++ [pid 409] <... openat resumed>) = 3 [pid 938] <... set_robust_list resumed>) = 0 [pid 933] ioctl(6, LOOP_CLR_FD [pid 409] ioctl(3, LOOP_CLR_FD [pid 938] memfd_create("syzkaller", 0 [pid 933] <... ioctl resumed>) = 0 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=901, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 938] <... memfd_create resumed>) = 6 [pid 933] close(6 [pid 409] close(3 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 938] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 933] <... close resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 938] <... mmap resumed>) = 0x7f6f98bca000 [pid 933] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] ioctl(3, LOOP_CLR_FD [pid 938] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 933] <... futex resumed>) = 0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 939] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 938] <... write resumed>) = 1048576 [pid 937] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 933] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 930] exit_group(0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 941 [pid 407] close(3 [pid 939] <... futex resumed>) = 0 [pid 937] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 935] <... futex resumed>) = ? [pid 933] <... futex resumed>) = ? [pid 930] <... exit_group resumed>) = ? [pid 407] <... close resumed>) = 0 [pid 939] sendfile(4, 5, NULL, 140737974943952 [pid 935] +++ exited with 0 +++ [pid 933] +++ exited with 0 +++ [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 943 [pid 930] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=930, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 938] munmap(0x7f6f98bca000, 1048576) = 0 [pid 937] <... futex resumed>) = 0 [pid 937] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 938] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 7 [pid 938] ioctl(7, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 938] ioctl(7, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 943 attached [pid 943] set_robust_list(0x5555564066e0, 24) = 0 [pid 943] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 943] setpgid(0, 0) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 938] ioctl(7, LOOP_SET_FD, 6 [pid 408] ioctl(3, LOOP_CLR_FD [pid 938] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [ 23.656873][ T918] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.661061][ T933] loop1: detected capacity change from 0 to 2048 [ 23.668501][ T931] loop5: detected capacity change from 0 to 2048 [ 23.684681][ T933] EXT4-fs (loop1): VFS: Can't find ext4 filesystem [pid 408] <... ioctl resumed>) = 0 [pid 938] close(7 [pid 915] +++ exited with 0 +++ [pid 938] <... close resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=915, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 938] close(6) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 944 [pid 938] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 938] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 944 attached ./strace-static-x86_64: Process 941 attached [pid 943] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 939] <... sendfile resumed>) = 1048576 [pid 408] close(3 [pid 944] set_robust_list(0x5555564066e0, 24 [pid 943] <... openat resumed>) = 3 [pid 941] set_robust_list(0x5555564066e0, 24 [pid 939] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... close resumed>) = 0 [pid 944] <... set_robust_list resumed>) = 0 [pid 943] write(3, "1000", 4 [pid 941] <... set_robust_list resumed>) = 0 [pid 939] <... futex resumed>) = 1 [pid 937] <... futex resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 944] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 943] <... write resumed>) = 4 [pid 941] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 939] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 931] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 937] exit_group(0 [pid 931] ioctl(7, LOOP_CLR_FD) = 0 [pid 944] <... prctl resumed>) = 0 [pid 943] close(3 [pid 941] <... prctl resumed>) = 0 [pid 939] <... futex resumed>) = ? [pid 938] <... futex resumed>) = ? [pid 937] <... exit_group resumed>) = ? [pid 931] close(7 [pid 938] +++ exited with 0 +++ [pid 931] <... close resumed>) = 0 [pid 931] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 931] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 945 attached [pid 945] set_robust_list(0x5555564066e0, 24 [pid 944] setpgid(0, 0 [pid 943] <... close resumed>) = 0 [pid 939] +++ exited with 0 +++ [pid 945] <... set_robust_list resumed>) = 0 [pid 944] <... setpgid resumed>) = 0 [pid 943] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 945] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 945] setpgid(0, 0) = 0 [pid 945] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 944] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 943] <... futex resumed>) = 0 [pid 941] setpgid(0, 0 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 945 [pid 945] <... openat resumed>) = 3 [pid 943] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 941] <... setpgid resumed>) = 0 [pid 945] write(3, "1000", 4) = 4 [pid 945] close(3 [pid 944] <... openat resumed>) = 3 [pid 928] exit_group(0 [pid 943] <... mmap resumed>) = 0x7f6fa0feb000 [pid 934] <... futex resumed>) = ? [pid 931] <... futex resumed>) = ? [pid 928] <... exit_group resumed>) = ? [pid 944] write(3, "1000", 4 [pid 943] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 941] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 934] +++ exited with 0 +++ [pid 931] +++ exited with 0 +++ [pid 945] <... close resumed>) = 0 [pid 945] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 945] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 945] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 945] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 943] <... mprotect resumed>) = 0 [pid 945] <... clone resumed>, parent_tid=[946], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 946 [pid 941] <... openat resumed>) = 3 [pid 945] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 943] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 944] <... write resumed>) = 4 [pid 941] write(3, "1000", 4 [pid 944] close(3 [pid 945] <... futex resumed>) = 0 [pid 945] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 945] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 944] <... close resumed>) = 0 ./strace-static-x86_64: Process 947 attached ./strace-static-x86_64: Process 946 attached [pid 945] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 944] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 943] <... clone resumed>, parent_tid=[947], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 947 [pid 941] <... write resumed>) = 4 [pid 947] set_robust_list(0x7f6fa100b9e0, 24 [pid 946] set_robust_list(0x7f6fa100b9e0, 24 [pid 945] <... mprotect resumed>) = 0 [pid 944] <... futex resumed>) = 0 [pid 943] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 941] close(3 [pid 947] <... set_robust_list resumed>) = 0 [pid 946] <... set_robust_list resumed>) = 0 [pid 945] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 944] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 943] <... futex resumed>) = 0 [pid 941] <... close resumed>) = 0 ./strace-static-x86_64: Process 948 attached [pid 947] memfd_create("syzkaller", 0 [pid 946] memfd_create("syzkaller", 0 [pid 941] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 948] set_robust_list(0x7f6fa0fea9e0, 24 [pid 945] <... clone resumed>, parent_tid=[948], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 948 [pid 941] <... futex resumed>) = 0 [pid 948] <... set_robust_list resumed>) = 0 [pid 945] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 941] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 948] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 945] <... futex resumed>) = 0 [pid 941] <... mmap resumed>) = 0x7f6fa0feb000 [pid 948] <... open resumed>) = 3 [pid 945] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 941] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 948] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 941] <... mprotect resumed>) = 0 [pid 948] <... futex resumed>) = 1 [pid 945] <... futex resumed>) = 0 [pid 941] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 948] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 945] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 944] <... mmap resumed>) = 0x7f6fa0feb000 [pid 943] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 948] <... mount resumed>) = 0 [pid 946] <... memfd_create resumed>) = 4 [pid 945] <... futex resumed>) = 0 [pid 944] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 943] <... futex resumed>) = 0 [pid 941] <... clone resumed>, parent_tid=[949], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 949 [pid 948] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 945] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 944] <... mprotect resumed>) = 0 [pid 943] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 941] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 948] <... futex resumed>) = 0 [pid 945] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 941] <... futex resumed>) = 0 [pid 948] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 945] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 944] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 943] <... mmap resumed>) = 0x7f6fa0fca000 [pid 941] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 946] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 945] <... futex resumed>) = 0 [pid 943] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 941] <... futex resumed>) = 0 [pid 945] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 943] <... mprotect resumed>) = 0 [pid 941] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 944] <... clone resumed>, parent_tid=[950], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 950 [pid 941] <... mmap resumed>) = 0x7f6fa0fca000 [pid 941] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 944] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 943] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 941] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 944] <... futex resumed>) = 0 [pid 944] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 943] <... clone resumed>, parent_tid=[951], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 951 [pid 941] <... clone resumed>, parent_tid=[952], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 952 [pid 944] <... futex resumed>) = 0 [pid 943] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 941] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 944] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 943] <... futex resumed>) = 0 [pid 941] <... futex resumed>) = 0 [pid 944] <... mmap resumed>) = 0x7f6fa0fca000 [pid 943] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 941] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 949 attached [pid 944] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 949] set_robust_list(0x7f6fa100b9e0, 24 [pid 944] <... mprotect resumed>) = 0 [pid 949] <... set_robust_list resumed>) = 0 [pid 944] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 949] memfd_create("syzkaller", 0) = 3 [pid 944] <... clone resumed>, parent_tid=[953], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 953 [pid 949] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 949] <... mmap resumed>) = 0x7f6f98bca000 [pid 944] <... futex resumed>) = 0 ./strace-static-x86_64: Process 953 attached ./strace-static-x86_64: Process 951 attached ./strace-static-x86_64: Process 952 attached ./strace-static-x86_64: Process 950 attached [pid 947] <... memfd_create resumed>) = 3 [pid 946] <... mmap resumed>) = 0x7f6f98bca000 [pid 944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 953] set_robust_list(0x7f6fa0fea9e0, 24 [pid 951] set_robust_list(0x7f6fa0fea9e0, 24 [pid 952] set_robust_list(0x7f6fa0fea9e0, 24 [pid 950] set_robust_list(0x7f6fa100b9e0, 24 [pid 949] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 947] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 953] <... set_robust_list resumed>) = 0 [pid 951] <... set_robust_list resumed>) = 0 [pid 952] <... set_robust_list resumed>) = 0 [pid 950] <... set_robust_list resumed>) = 0 [pid 947] <... mmap resumed>) = 0x7f6f98bca000 [pid 946] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 953] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 951] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 952] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 950] memfd_create("syzkaller", 0 [pid 949] <... write resumed>) = 1048576 [pid 949] munmap(0x7f6f98bca000, 1048576) = 0 [pid 949] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 949] ioctl(4, LOOP_SET_FD, 3 [pid 950] <... memfd_create resumed>) = 4 [pid 947] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 946] <... write resumed>) = 1048576 [pid 950] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 949] <... ioctl resumed>) = 0 [pid 949] close(3 [pid 950] <... mmap resumed>) = 0x7f6f98bca000 [pid 949] <... close resumed>) = 0 [pid 949] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 949] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 947] <... write resumed>) = 1048576 [pid 947] munmap(0x7f6f98bca000, 1048576) = 0 [pid 947] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 23.707352][ T931] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.741506][ T949] loop2: detected capacity change from 0 to 2048 [pid 947] ioctl(5, LOOP_SET_FD, 3 [pid 950] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 947] <... ioctl resumed>) = 0 [pid 946] munmap(0x7f6f98bca000, 1048576 [pid 937] +++ exited with 0 +++ [pid 928] +++ exited with 0 +++ [pid 950] <... write resumed>) = 1048576 [pid 948] <... open resumed>) = 5 [pid 946] <... munmap resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=928, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=937, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 950] munmap(0x7f6f98bca000, 1048576 [pid 946] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 950] <... munmap resumed>) = 0 [pid 946] <... openat resumed>) = 6 [pid 953] <... open resumed>) = 3 [pid 950] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 946] ioctl(6, LOOP_SET_FD, 4 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 953] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 951] <... open resumed>) = 4 [pid 952] <... open resumed>) = 5 [pid 950] <... openat resumed>) = 5 [pid 948] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 947] close(3 [pid 953] <... futex resumed>) = 1 [pid 951] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 948] <... futex resumed>) = 1 [pid 947] <... close resumed>) = 0 [pid 945] <... futex resumed>) = 0 [pid 953] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 951] <... futex resumed>) = 1 [pid 948] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 947] mkdir("./bus", 0777 [pid 945] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 951] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 948] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 947] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 945] <... futex resumed>) = 0 [pid 948] openat(-1, "/proc/self/exe", O_RDONLY [pid 947] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 945] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 948] <... openat resumed>) = 7 [pid 948] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 945] <... futex resumed>) = 0 [pid 948] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 945] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 948] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 945] <... futex resumed>) = 0 [pid 948] sendfile(5, 7, NULL, 140737974943952 [pid 945] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 948] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 948] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 945] <... futex resumed>) = 0 [pid 948] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 954 [pid 944] <... futex resumed>) = 0 [pid 943] <... futex resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 952] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 950] ioctl(5, LOOP_SET_FD, 4 [pid 944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 943] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 954 attached [pid 953] <... futex resumed>) = 0 [pid 951] <... futex resumed>) = 0 [pid 952] <... futex resumed>) = 1 [pid 946] <... ioctl resumed>) = 0 [pid 944] <... futex resumed>) = 1 [pid 943] <... futex resumed>) = 1 [pid 941] <... futex resumed>) = 0 [pid 411] <... ioctl resumed>) = 0 [pid 954] set_robust_list(0x5555564066e0, 24 [pid 953] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 951] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 952] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 946] close(4 [pid 944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 943] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 954] <... set_robust_list resumed>) = 0 [pid 946] <... close resumed>) = 0 [pid 954] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 953] <... mount resumed>) = 0 [pid 951] <... mount resumed>) = 0 [pid 946] mkdir("./bus", 0777 [pid 941] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] close(3 [pid 954] <... prctl resumed>) = 0 [pid 953] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 951] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 946] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 954] setpgid(0, 0 [pid 946] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 954] <... setpgid resumed>) = 0 [pid 953] <... futex resumed>) = 1 [pid 951] <... futex resumed>) = 1 [pid 952] <... futex resumed>) = 0 [pid 944] <... futex resumed>) = 0 [pid 943] <... futex resumed>) = 0 [pid 941] <... futex resumed>) = 1 [pid 411] <... close resumed>) = 0 [pid 954] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 952] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 943] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 954] <... openat resumed>) = 3 [pid 953] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 951] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 952] <... mount resumed>) = 0 [pid 944] <... futex resumed>) = 0 [pid 943] <... futex resumed>) = 0 [pid 941] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 954] write(3, "1000", 4 [pid 952] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 943] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 954] <... write resumed>) = 4 [pid 952] <... futex resumed>) = 0 [pid 954] close(3 [pid 952] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 954] <... close resumed>) = 0 [pid 954] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 954] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 954] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 954] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[958], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 958 [pid 954] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 954] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 954] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 954] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 954] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 941] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 954] <... clone resumed>, parent_tid=[959], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 959 [pid 954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 941] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 953] <... open resumed>) = 6 [pid 951] <... open resumed>) = 3 [pid 952] <... futex resumed>) = 0 [pid 941] <... futex resumed>) = 1 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 960 [pid 953] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 951] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 952] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 950] <... ioctl resumed>) = 0 [pid 953] <... futex resumed>) = 1 [pid 951] <... futex resumed>) = 1 [pid 952] <... open resumed>) = 3 [pid 944] <... futex resumed>) = 0 [pid 943] <... futex resumed>) = 0 [pid 941] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 952] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 950] close(4 [pid 944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 943] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 953] openat(-1, "/proc/self/exe", O_RDONLY [pid 951] openat(-1, "/proc/self/exe", O_RDONLY [pid 952] <... futex resumed>) = 0 [pid 944] <... futex resumed>) = 0 [pid 943] <... futex resumed>) = 0 [pid 941] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 953] <... openat resumed>) = 4 [pid 951] <... openat resumed>) = 6 [pid 952] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 950] <... close resumed>) = 0 [pid 944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 943] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 941] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 953] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 951] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 952] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 944] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 943] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 941] <... futex resumed>) = 0 [pid 953] <... futex resumed>) = 0 [pid 951] <... futex resumed>) = 0 [pid 952] openat(-1, "/proc/self/exe", O_RDONLY [pid 944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 943] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 941] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 953] sendfile(6, 4, NULL, 140737974943952 [pid 951] sendfile(3, 6, NULL, 140737974943952 [pid 952] <... openat resumed>) = 6 [pid 944] <... futex resumed>) = 0 [pid 943] <... futex resumed>) = 0 [pid 952] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 943] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 952] <... futex resumed>) = 1 [pid 941] <... futex resumed>) = 0 [pid 952] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 941] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 952] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 941] <... futex resumed>) = 0 [pid 952] sendfile(3, 6, NULL, 140737974943952 [pid 941] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 958 attached [pid 958] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 958] memfd_create("syzkaller", 0) = 3 [pid 958] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [ 23.752157][ T947] loop0: detected capacity change from 0 to 2048 [ 23.769581][ T946] loop1: detected capacity change from 0 to 2048 [ 23.777706][ T950] loop3: detected capacity change from 0 to 2048 [ 23.784631][ T949] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) ./strace-static-x86_64: Process 960 attached ./strace-static-x86_64: Process 959 attached [pid 958] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 950] mkdir("./bus", 0777 [pid 960] set_robust_list(0x5555564066e0, 24 [pid 959] set_robust_list(0x7f6fa0fea9e0, 24 [pid 958] <... write resumed>) = 1048576 [pid 950] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 960] <... set_robust_list resumed>) = 0 [pid 959] <... set_robust_list resumed>) = 0 [pid 958] munmap(0x7f6f98bca000, 1048576 [pid 950] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 960] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 959] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 958] <... munmap resumed>) = 0 [pid 960] <... prctl resumed>) = 0 [pid 959] <... open resumed>) = 4 [pid 958] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 960] setpgid(0, 0 [pid 959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 958] <... openat resumed>) = 5 [pid 960] <... setpgid resumed>) = 0 [pid 959] <... futex resumed>) = 1 [pid 958] ioctl(5, LOOP_SET_FD, 3 [pid 960] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 959] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 954] <... futex resumed>) = 0 [pid 951] <... sendfile resumed>) = 1048576 [pid 960] <... openat resumed>) = 3 [pid 954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 960] write(3, "1000", 4 [pid 959] <... futex resumed>) = 0 [pid 954] <... futex resumed>) = 1 [pid 951] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 960] <... write resumed>) = 4 [pid 959] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 951] <... futex resumed>) = 1 [pid 953] <... sendfile resumed>) = 1048576 [pid 943] <... futex resumed>) = 0 [pid 960] close(3 [pid 959] <... mount resumed>) = 0 [pid 953] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 951] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 952] <... sendfile resumed>) = 1048576 [pid 960] <... close resumed>) = 0 [pid 959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 953] <... futex resumed>) = 0 [pid 952] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 944] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 941] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 960] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 959] <... futex resumed>) = 1 [pid 954] <... futex resumed>) = 0 [pid 953] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 952] <... futex resumed>) = 0 [pid 960] <... futex resumed>) = 0 [ 23.805967][ T947] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.842009][ T958] loop5: detected capacity change from 0 to 2048 [pid 959] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 952] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 960] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 960] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 960] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[966], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 966 [pid 960] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 960] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 960] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 960] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 960] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[967], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 967 [pid 960] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 960] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 959] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 954] <... futex resumed>) = 0 [pid 959] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 967 attached ./strace-static-x86_64: Process 966 attached ) = 6 [pid 958] <... ioctl resumed>) = 0 [pid 954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 949] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 947] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 967] set_robust_list(0x7f6fa0fea9e0, 24 [pid 966] set_robust_list(0x7f6fa100b9e0, 24 [pid 959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 958] close(3 [pid 954] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 949] ioctl(4, LOOP_CLR_FD [pid 947] ioctl(5, LOOP_CLR_FD [pid 967] <... set_robust_list resumed>) = 0 [pid 966] <... set_robust_list resumed>) = 0 [pid 959] <... futex resumed>) = 0 [pid 958] <... close resumed>) = 0 [ 23.859638][ T946] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 23.872445][ T950] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 949] <... ioctl resumed>) = 0 [pid 947] <... ioctl resumed>) = 0 [pid 946] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 967] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 966] memfd_create("syzkaller", 0 [pid 960] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 959] openat(-1, "/proc/self/exe", O_RDONLY [pid 958] mkdir("./bus", 0777 [pid 954] <... futex resumed>) = 0 [pid 949] close(4 [pid 967] <... open resumed>) = 3 [pid 966] <... memfd_create resumed>) = 4 [pid 960] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 959] <... openat resumed>) = 3 [pid 958] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 949] <... close resumed>) = 0 [pid 967] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 966] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 960] <... futex resumed>) = 0 [pid 959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 958] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 954] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 949] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 947] close(5 [pid 946] ioctl(6, LOOP_CLR_FD [pid 967] <... futex resumed>) = 0 [pid 966] <... mmap resumed>) = 0x7f6f98bca000 [pid 960] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 959] <... futex resumed>) = 0 [pid 954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 949] <... futex resumed>) = 0 [pid 947] <... close resumed>) = 0 [pid 946] <... ioctl resumed>) = 0 [pid 941] exit_group(0 [pid 967] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 966] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 960] <... mmap resumed>) = 0x7f6f98ba9000 [pid 959] sendfile(6, 3, NULL, 140737974943952 [pid 966] <... write resumed>) = 1048576 [pid 960] mprotect(0x7f6f98baa000, 131072, PROT_READ|PROT_WRITE [pid 966] munmap(0x7f6f98bca000, 1048576 [pid 960] <... mprotect resumed>) = 0 [pid 966] <... munmap resumed>) = 0 [pid 960] clone(child_stack=0x7f6f98bc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 966] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 5 [pid 960] <... clone resumed>, parent_tid=[970], tls=0x7f6f98bc9700, child_tidptr=0x7f6f98bc99d0) = 970 [pid 966] ioctl(5, LOOP_SET_FD, 4 [pid 960] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 966] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 960] <... futex resumed>) = 0 [pid 966] ioctl(5, LOOP_CLR_FD [pid 960] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 966] <... ioctl resumed>) = 0 [pid 966] ioctl(5, LOOP_SET_FD, 4 [pid 954] <... futex resumed>) = 0 [pid 947] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 966] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 952] <... futex resumed>) = ? [pid 946] close(6 [pid 941] <... exit_group resumed>) = ? [pid 947] <... futex resumed>) = 0 [pid 966] close(5 [pid 954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 952] +++ exited with 0 +++ [pid 949] +++ exited with 0 +++ [pid 947] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 946] <... close resumed>) = 0 [pid 966] <... close resumed>) = 0 [pid 941] +++ exited with 0 +++ [pid 943] exit_group(0 [pid 946] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 966] close(4 [pid 951] <... futex resumed>) = ? [pid 947] <... futex resumed>) = ? [pid 943] <... exit_group resumed>) = ? [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=941, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- ./strace-static-x86_64: Process 970 attached [pid 966] <... close resumed>) = 0 [pid 958] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 951] +++ exited with 0 +++ [pid 950] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 947] +++ exited with 0 +++ [pid 946] <... futex resumed>) = 0 [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 970] set_robust_list(0x7f6f98bc99e0, 24 [pid 966] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 950] ioctl(5, LOOP_CLR_FD [pid 946] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 945] exit_group(0 [pid 943] +++ exited with 0 +++ [pid 409] <... restart_syscall resumed>) = 0 [pid 970] <... set_robust_list resumed>) = 0 [pid 966] <... futex resumed>) = 0 [pid 959] <... sendfile resumed>) = 1048576 [pid 958] ioctl(5, LOOP_CLR_FD [pid 950] <... ioctl resumed>) = 0 [pid 948] <... futex resumed>) = ? [pid 946] <... futex resumed>) = ? [pid 945] <... exit_group resumed>) = ? [pid 970] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 966] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 948] +++ exited with 0 +++ [pid 946] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=943, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 970] <... mount resumed>) = 0 [pid 950] close(5 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 970] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 958] <... ioctl resumed>) = 0 [pid 950] <... close resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 970] <... futex resumed>) = 1 [pid 960] <... futex resumed>) = 0 [pid 959] <... futex resumed>) = 1 [pid 958] close(5 [pid 954] <... futex resumed>) = 0 [pid 950] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] ioctl(3, LOOP_CLR_FD [pid 970] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 960] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 959] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 950] <... futex resumed>) = 0 [pid 944] exit_group(0 [pid 409] <... ioctl resumed>) = 0 [pid 966] <... futex resumed>) = 0 [pid 960] <... futex resumed>) = 1 [pid 958] <... close resumed>) = 0 [pid 953] <... futex resumed>) = ? [pid 944] <... exit_group resumed>) = ? [pid 409] close(3 [pid 407] <... openat resumed>) = 3 [pid 966] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 960] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 953] +++ exited with 0 +++ [pid 950] +++ exited with 0 +++ [pid 409] <... close resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 958] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 954] exit_group(0 [pid 944] +++ exited with 0 +++ [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 959] <... futex resumed>) = ? [pid 958] <... futex resumed>) = ? [pid 954] <... exit_group resumed>) = ? [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=944, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 407] close(3 [pid 958] +++ exited with 0 +++ [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 971 [pid 407] <... close resumed>) = 0 [pid 410] <... restart_syscall resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 972 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = 0 [pid 410] close(3) = 0 ./strace-static-x86_64: Process 972 attached ./strace-static-x86_64: Process 971 attached [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 973 attached [pid 972] set_robust_list(0x5555564066e0, 24 [pid 971] set_robust_list(0x5555564066e0, 24 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 973 [pid 972] <... set_robust_list resumed>) = 0 [pid 971] <... set_robust_list resumed>) = 0 [pid 973] set_robust_list(0x5555564066e0, 24) = 0 [pid 973] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 971] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 973] setpgid(0, 0) = 0 [pid 973] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 973] write(3, "1000", 4) = 4 [pid 972] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 971] <... prctl resumed>) = 0 [pid 973] close(3) = 0 [pid 973] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 973] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 972] <... prctl resumed>) = 0 [pid 971] setpgid(0, 0 [pid 973] <... mmap resumed>) = 0x7f6fa0feb000 [pid 973] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 973] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 972] setpgid(0, 0 [pid 971] <... setpgid resumed>) = 0 [pid 973] <... clone resumed>, parent_tid=[974], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 974 [pid 973] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 973] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 973] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 973] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 972] <... setpgid resumed>) = 0 [pid 973] <... mprotect resumed>) = 0 [pid 971] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 973] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 972] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 973] <... clone resumed>, parent_tid=[975], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 975 [pid 972] write(3, "1000", 4 [pid 971] <... openat resumed>) = 3 [pid 973] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 973] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 975 attached [pid 972] <... write resumed>) = 4 [pid 971] write(3, "1000", 4./strace-static-x86_64: Process 974 attached [pid 974] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 974] memfd_create("syzkaller", 0) = 3 [pid 972] close(3 [pid 971] <... write resumed>) = 4 [pid 974] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 972] <... close resumed>) = 0 [pid 971] close(3 [pid 972] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 975] set_robust_list(0x7f6fa0fea9e0, 24 [pid 972] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 971] <... close resumed>) = 0 [pid 972] <... mmap resumed>) = 0x7f6fa0feb000 [pid 971] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 975] <... set_robust_list resumed>) = 0 [pid 972] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 971] <... futex resumed>) = 0 [pid 975] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 972] <... mprotect resumed>) = 0 [pid 971] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 972] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 971] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 972] <... clone resumed>, parent_tid=[976], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 976 [pid 971] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 972] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 971] <... clone resumed>, parent_tid=[977], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 977 [pid 971] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 972] <... futex resumed>) = 0 [pid 972] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 971] <... futex resumed>) = 0 [ 23.931206][ T958] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 971] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 972] <... futex resumed>) = 0 [pid 972] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 971] <... futex resumed>) = 0 ./strace-static-x86_64: Process 976 attached [pid 971] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 972] <... mmap resumed>) = 0x7f6fa0fca000 [pid 976] set_robust_list(0x7f6fa100b9e0, 24 [pid 972] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 971] <... mmap resumed>) = 0x7f6fa0fca000 [pid 972] <... mprotect resumed>) = 0 [pid 971] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 976] <... set_robust_list resumed>) = 0 [pid 972] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 971] <... mprotect resumed>) = 0 [pid 971] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 972] <... clone resumed>, parent_tid=[978], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 978 [pid 971] <... clone resumed>, parent_tid=[979], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 979 [pid 972] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 971] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 972] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 971] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 978 attached [pid 976] memfd_create("syzkaller", 0) = 3 [pid 978] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 976] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 978] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 976] <... mmap resumed>) = 0x7f6f98bca000 ./strace-static-x86_64: Process 977 attached [pid 977] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 978] <... open resumed>) = 4 [pid 976] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 966] <... open resumed>) = 4 [pid 945] +++ exited with 0 +++ [pid 966] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 960] <... futex resumed>) = 0 [pid 966] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 960] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 966] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 960] <... futex resumed>) = 0 [pid 966] openat(-1, "/proc/self/exe", O_RDONLY [pid 960] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 966] <... openat resumed>) = 5 [pid 966] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 960] <... futex resumed>) = 0 [pid 966] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 960] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 966] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 960] <... futex resumed>) = 0 [pid 966] sendfile(4, 5, NULL, 140737974943952 [pid 960] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 966] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 966] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 960] <... futex resumed>) = 0 [pid 966] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 960] exit_group(0 [pid 970] <... futex resumed>) = ? [pid 967] <... futex resumed>) = ? [pid 966] <... futex resumed>) = ? [pid 960] <... exit_group resumed>) = ? [pid 970] +++ exited with 0 +++ [pid 967] +++ exited with 0 +++ [pid 966] +++ exited with 0 +++ [pid 974] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 959] +++ exited with 0 +++ [pid 954] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=945, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=954, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 977] memfd_create("syzkaller", 0 [pid 975] <... open resumed>) = 4 ./strace-static-x86_64: Process 979 attached [pid 979] set_robust_list(0x7f6fa0fea9e0, 24 [pid 977] <... memfd_create resumed>) = 3 [pid 979] <... set_robust_list resumed>) = 0 [pid 979] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 977] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 975] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 979] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 975] <... futex resumed>) = 1 [pid 973] <... futex resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 979] <... futex resumed>) = 1 [pid 973] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 971] <... futex resumed>) = 0 [pid 979] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 973] <... futex resumed>) = 0 [pid 975] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 973] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 971] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] ioctl(3, LOOP_CLR_FD [pid 978] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 974] <... write resumed>) = 1048576 [pid 979] <... futex resumed>) = 0 [pid 978] <... futex resumed>) = 1 [pid 976] <... write resumed>) = 1048576 [pid 975] <... mount resumed>) = 0 [pid 972] <... futex resumed>) = 0 [pid 971] <... futex resumed>) = 1 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 979] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 975] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 972] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 971] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 979] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 975] <... futex resumed>) = 1 [pid 973] <... futex resumed>) = 0 [pid 972] <... futex resumed>) = 0 [pid 971] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 408] close(3 [pid 979] <... futex resumed>) = 0 [pid 973] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 979] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 973] <... futex resumed>) = 0 [pid 973] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 978] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 977] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 976] munmap(0x7f6f98bca000, 1048576 [pid 975] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 972] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 971] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... close resumed>) = 0 [pid 974] munmap(0x7f6f98bca000, 1048576 [pid 979] <... futex resumed>) = 0 [pid 975] <... open resumed>) = 5 [pid 971] <... futex resumed>) = 1 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 979] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 971] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 979] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 979] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 974] <... munmap resumed>) = 0 [pid 971] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 974] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 975] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 974] <... openat resumed>) = 6 [pid 971] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 980 [pid 974] ioctl(6, LOOP_SET_FD, 3 [pid 979] <... futex resumed>) = 0 [pid 975] <... futex resumed>) = 1 [pid 973] <... futex resumed>) = 0 [pid 971] <... futex resumed>) = 1 [pid 979] openat(-1, "/proc/self/exe", O_RDONLY [pid 973] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 971] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 975] openat(-1, "/proc/self/exe", O_RDONLY [pid 979] <... openat resumed>) = 6 [pid 978] <... mount resumed>) = 0 [pid 973] <... futex resumed>) = 0 ./strace-static-x86_64: Process 980 attached [pid 979] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 978] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 976] <... munmap resumed>) = 0 [pid 975] <... openat resumed>) = 7 [pid 974] <... ioctl resumed>) = 0 [pid 973] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 971] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 980] set_robust_list(0x5555564066e0, 24 [pid 979] <... futex resumed>) = 0 [pid 978] <... futex resumed>) = 1 [pid 976] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 975] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 974] close(3 [pid 973] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 972] <... futex resumed>) = 0 [pid 971] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 980] <... set_robust_list resumed>) = 0 [pid 979] sendfile(5, 6, NULL, 140737974943952 [pid 978] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 977] <... write resumed>) = 1048576 [pid 976] <... openat resumed>) = 5 [pid 975] <... futex resumed>) = 0 [pid 973] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 972] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 971] <... futex resumed>) = 0 [pid 980] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 979] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 978] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 977] munmap(0x7f6f98bca000, 1048576 [pid 973] <... futex resumed>) = 0 [pid 980] <... prctl resumed>) = 0 [pid 979] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 978] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 977] <... munmap resumed>) = 0 [pid 976] ioctl(5, LOOP_SET_FD, 3 [pid 975] sendfile(5, 7, NULL, 140737974943952 [pid 974] <... close resumed>) = 0 [pid 973] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 972] <... futex resumed>) = 0 [pid 971] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 980] setpgid(0, 0 [pid 979] <... futex resumed>) = 0 [pid 977] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 979] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 977] <... openat resumed>) = 7 [pid 977] ioctl(7, LOOP_SET_FD, 3 [pid 978] <... open resumed>) = 6 [pid 977] <... ioctl resumed>) = 0 [pid 977] close(3) = 0 [pid 977] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 977] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 972] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 971] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 980] <... setpgid resumed>) = 0 [pid 978] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 972] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 980] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 972] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 980] <... openat resumed>) = 3 [pid 978] <... futex resumed>) = 0 [pid 972] <... futex resumed>) = 0 [pid 972] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 980] write(3, "1000", 4 [pid 978] openat(-1, "/proc/self/exe", O_RDONLY [pid 974] mkdir("./bus", 0777 [ 24.017956][ T974] loop3: detected capacity change from 0 to 2048 [ 24.028830][ T977] loop2: detected capacity change from 0 to 2048 [ 24.029237][ T976] loop0: detected capacity change from 0 to 2048 [ 24.042939][ T92] print_req_error: 14 callbacks suppressed [ 24.042953][ T92] blk_update_request: I/O error, dev loop0, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [pid 978] <... openat resumed>) = 7 [pid 980] <... write resumed>) = 4 [pid 980] close(3 [pid 978] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 980] <... close resumed>) = 0 [pid 978] <... futex resumed>) = 1 [pid 972] <... futex resumed>) = 0 [pid 980] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 972] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 978] sendfile(6, 7, NULL, 140737974943952 [pid 980] <... futex resumed>) = 0 [pid 972] <... futex resumed>) = 0 [pid 975] <... sendfile resumed>) = 1048576 [pid 975] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 973] <... futex resumed>) = 0 [pid 975] <... futex resumed>) = 1 [pid 975] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 960] +++ exited with 0 +++ [pid 972] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... openat resumed>) = 3 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=960, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 412] ioctl(3, LOOP_CLR_FD [pid 980] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 980] <... mmap resumed>) = 0x7f6fa0feb000 [pid 412] close(3 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 980] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 412] <... close resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 980] <... mprotect resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 411] ioctl(3, LOOP_CLR_FD [pid 980] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 981 [pid 411] close(3 [pid 980] <... clone resumed>, parent_tid=[982], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 982 [pid 411] <... close resumed>) = 0 [pid 980] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 980] <... futex resumed>) = 0 [pid 980] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 983 [pid 980] <... futex resumed>) = 0 [pid 980] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 980] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 980] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[984], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 984 [pid 980] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 980] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 974] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 974] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 981 attached [pid 978] <... sendfile resumed>) = -1 EIO (Input/output error) ./strace-static-x86_64: Process 983 attached [pid 978] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 972] <... futex resumed>) = 0 [pid 978] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 982 attached ./strace-static-x86_64: Process 984 attached [pid 984] set_robust_list(0x7f6fa0fea9e0, 24 [pid 982] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 984] <... set_robust_list resumed>) = 0 [pid 982] memfd_create("syzkaller", 0 [pid 984] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 981] set_robust_list(0x5555564066e0, 24) = 0 [pid 981] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 983] set_robust_list(0x5555564066e0, 24) = 0 [pid 983] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 983] setpgid(0, 0) = 0 [pid 983] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 983] write(3, "1000", 4) = 4 [pid 983] close(3) = 0 [pid 983] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 983] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 983] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 983] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[985], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 985 [pid 983] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 983] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 983] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 983] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 982] <... memfd_create resumed>) = 4 [pid 983] <... mprotect resumed>) = 0 [pid 981] <... prctl resumed>) = 0 [pid 983] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 982] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 981] setpgid(0, 0 [pid 982] <... mmap resumed>) = 0x7f6f98bca000 [pid 981] <... setpgid resumed>) = 0 ./strace-static-x86_64: Process 985 attached [pid 983] <... clone resumed>, parent_tid=[986], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 986 [pid 982] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 981] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 983] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 983] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 981] <... openat resumed>) = 3 [pid 981] write(3, "1000", 4) = 4 [pid 981] close(3) = 0 [pid 981] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 981] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 981] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 981] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[988], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 988 [pid 981] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 981] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 986 attached ) = 0 [pid 981] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 981] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 981] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[989], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 989 [pid 986] set_robust_list(0x7f6fa0fea9e0, 24 [pid 982] <... write resumed>) = 1048576 [pid 981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 986] <... set_robust_list resumed>) = 0 [pid 981] <... futex resumed>) = 0 [pid 981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 24.045235][ T977] ================================================================================ [ 24.049134][ T92] blk_update_request: I/O error, dev loop0, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.080485][ T977] UBSAN: shift-out-of-bounds in fs/ext4/super.c:2490:15 [ 24.087548][ T977] shift exponent 863936 is too large for 32-bit type 'int' [ 24.099583][ T977] CPU: 1 PID: 977 Comm: syz-executor138 Not tainted 5.15.78-syzkaller-00911-gc73b4619ad86 #0 [pid 986] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 989 attached ./strace-static-x86_64: Process 988 attached ) = 3 [pid 984] <... open resumed>) = 3 [pid 980] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 976] <... ioctl resumed>) = 0 [pid 989] set_robust_list(0x7f6fa0fea9e0, 24 [pid 988] set_robust_list(0x7f6fa100b9e0, 24 [pid 986] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 984] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 980] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 976] close(3 [pid 989] <... set_robust_list resumed>) = 0 [ 24.109566][ T977] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 24.119452][ T977] Call Trace: [ 24.122576][ T977] [ 24.125351][ T977] dump_stack_lvl+0x151/0x1b7 [ 24.129869][ T977] ? bfq_pos_tree_add_move+0x43e/0x43e [ 24.135156][ T977] ? __se_sys_mount+0x2d2/0x3c0 [ 24.139848][ T977] dump_stack+0x15/0x17 [ 24.143838][ T977] __ubsan_handle_shift_out_of_bounds+0x3a6/0x430 [ 24.150097][ T977] parse_options+0x2d21/0x2da0 [ 24.154688][ T977] ? ext4_superblock_csum_verify+0x410/0x410 [ 24.160502][ T977] ? make_kgid+0x215/0x710 [ 24.161449][ T982] loop1: detected capacity change from 0 to 2048 [ 24.164759][ T977] ? ext4_has_metadata_csum+0x149/0x1f0 [ 24.176299][ T977] ext4_fill_super+0x1fee/0x9650 [ 24.181084][ T977] ? __kasan_check_write+0x14/0x20 [ 24.186019][ T977] ? ext4_mount+0x40/0x40 [ 24.190185][ T977] ? vscnprintf+0x80/0x80 [ 24.191078][ T988] loop5: detected capacity change from 0 to 2048 [ 24.194344][ T977] ? mutex_unlock+0xa2/0x110 [ 24.194367][ T977] ? set_blocksize+0x208/0x3a0 [ 24.194383][ T977] ? sb_set_blocksize+0xb7/0xf0 [ 24.201691][ T120] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.204933][ T977] mount_bdev+0x280/0x3b0 [ 24.209561][ T120] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.214218][ T977] ? ext4_mount+0x40/0x40 [ 24.231390][ T120] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.241302][ T977] ext4_mount+0x34/0x40 [ 24.241327][ T977] legacy_get_tree+0xf0/0x190 [ 24.245473][ T120] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.256576][ T977] ? ext4_errno_to_code+0x140/0x140 [ 24.265237][ T120] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.276194][ T977] vfs_get_tree+0x88/0x290 [ 24.276218][ T977] do_new_mount+0x289/0xad0 [ 24.281232][ T120] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.292336][ T977] ? do_move_mount_old+0x160/0x160 [ 24.316989][ T977] ? security_capable+0xb2/0xd0 [ 24.321673][ T977] ? ns_capable+0x8a/0xf0 [ 24.325842][ T977] path_mount+0x60b/0x1050 [ 24.330094][ T977] __se_sys_mount+0x2d2/0x3c0 [ 24.334605][ T977] ? __x64_sys_mount+0xd0/0xd0 [ 24.339203][ T977] ? vfs_mkdir+0x580/0x580 [ 24.343458][ T977] __x64_sys_mount+0xbf/0xd0 [ 24.347886][ T977] do_syscall_64+0x44/0xd0 [ 24.352137][ T977] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.357956][ T977] RIP: 0033:0x7f6fa10609aa [ 24.362210][ T977] Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 24.381653][ T977] RSP: 002b:00007f6fa100b078 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 24.389900][ T977] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6fa10609aa [ 24.396203][ T985] loop4: detected capacity change from 0 to 2048 [ 24.397703][ T977] RDX: 0000000020000740 RSI: 0000000020000100 RDI: 00007f6fa100b090 [ 24.397717][ T977] RBP: 0000000000000007 R08: 00007f6fa100b0d0 R09: 0000000000000742 [pid 988] <... set_robust_list resumed>) = 0 [pid 986] <... futex resumed>) = 1 [pid 984] <... futex resumed>) = 0 [pid 983] <... futex resumed>) = 0 [pid 980] <... futex resumed>) = 0 [pid 976] <... close resumed>) = 0 [pid 989] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 988] memfd_create("syzkaller", 0 [pid 986] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 984] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 983] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 982] munmap(0x7f6f98bca000, 1048576 [pid 980] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 976] mkdir("./bus", 0777 [pid 989] <... open resumed>) = 3 [pid 988] <... memfd_create resumed>) = 4 [pid 986] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 984] <... mount resumed>) = 0 [pid 983] <... futex resumed>) = 0 [pid 982] <... munmap resumed>) = 0 [pid 976] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 989] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 988] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 986] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 984] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 983] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 982] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 976] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 989] <... futex resumed>) = 1 [pid 988] <... mmap resumed>) = 0x7f6f98bca000 [pid 986] <... mount resumed>) = 0 [pid 984] <... futex resumed>) = 1 [pid 982] <... openat resumed>) = 5 [pid 981] <... futex resumed>) = 0 [pid 980] <... futex resumed>) = 0 [pid 989] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 988] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 986] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 984] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 982] ioctl(5, LOOP_SET_FD, 4 [pid 981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 980] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 989] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 988] <... write resumed>) = 1048576 [pid 986] <... futex resumed>) = 1 [pid 984] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 983] <... futex resumed>) = 0 [pid 981] <... futex resumed>) = 0 [pid 980] <... futex resumed>) = 0 [pid 989] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 986] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 984] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 983] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 980] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 989] <... mount resumed>) = 0 [pid 986] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 984] <... open resumed>) = 6 [pid 983] <... futex resumed>) = 0 [pid 989] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 986] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 984] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 983] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 989] <... futex resumed>) = 1 [pid 986] <... open resumed>) = 4 [pid 984] <... futex resumed>) = 1 [pid 981] <... futex resumed>) = 0 [pid 980] <... futex resumed>) = 0 [pid 989] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 986] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 984] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 980] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 989] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 986] <... futex resumed>) = 1 [pid 984] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 983] <... futex resumed>) = 0 [pid 981] <... futex resumed>) = 0 [pid 980] <... futex resumed>) = 0 [pid 989] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 986] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 984] openat(-1, "/proc/self/exe", O_RDONLY [pid 983] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 980] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 989] <... open resumed>) = 5 [pid 988] munmap(0x7f6f98bca000, 1048576 [pid 986] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 984] <... openat resumed>) = 7 [pid 983] <... futex resumed>) = 0 [pid 989] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 988] <... munmap resumed>) = 0 [pid 986] openat(-1, "/proc/self/exe", O_RDONLY [pid 984] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 983] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 989] <... futex resumed>) = 1 [pid 988] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 986] <... openat resumed>) = 5 [pid 984] <... futex resumed>) = 1 [pid 981] <... futex resumed>) = 0 [pid 980] <... futex resumed>) = 0 [pid 989] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 988] <... openat resumed>) = 6 [pid 986] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 984] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 980] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 989] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 988] ioctl(6, LOOP_SET_FD, 4 [pid 986] <... futex resumed>) = 1 [pid 984] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 983] <... futex resumed>) = 0 [pid 981] <... futex resumed>) = 0 [pid 980] <... futex resumed>) = 0 [pid 989] openat(-1, "/proc/self/exe", O_RDONLY [pid 986] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 984] sendfile(6, 7, NULL, 140737974943952 [pid 983] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 980] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 989] <... openat resumed>) = 7 [pid 986] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 984] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 983] <... futex resumed>) = 0 [pid 989] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 986] sendfile(4, 5, NULL, 140737974943952 [pid 984] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 983] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 989] <... futex resumed>) = 1 [pid 986] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 984] <... futex resumed>) = 1 [pid 981] <... futex resumed>) = 0 [pid 980] <... futex resumed>) = 0 [pid 989] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 986] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 984] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 989] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 986] <... futex resumed>) = 1 [pid 983] <... futex resumed>) = 0 [pid 981] <... futex resumed>) = 0 [pid 989] sendfile(5, 7, NULL, 140737974943952 [pid 986] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 989] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 989] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 981] <... futex resumed>) = 0 [pid 989] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 982] <... ioctl resumed>) = 0 [pid 982] close(4) = 0 [pid 982] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 982] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 988] <... ioctl resumed>) = 0 [pid 988] close(4) = 0 [pid 988] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 988] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 985] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 985] memfd_create("syzkaller", 0) = 6 [pid 985] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 985] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 985] munmap(0x7f6f98bca000, 1048576) = 0 [pid 985] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 7 [pid 985] ioctl(7, LOOP_SET_FD, 6) = 0 [pid 985] close(6) = 0 [pid 985] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 985] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 973] exit_group(0 [pid 975] <... futex resumed>) = ? [pid 973] <... exit_group resumed>) = ? [pid 975] +++ exited with 0 +++ [pid 972] exit_group(0 [pid 978] <... futex resumed>) = ? [pid 972] <... exit_group resumed>) = ? [pid 978] +++ exited with 0 +++ [pid 971] exit_group(0 [pid 979] <... futex resumed>) = ? [pid 971] <... exit_group resumed>) = ? [pid 979] +++ exited with 0 +++ [ 24.408384][ T974] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 24.411677][ T977] R10: 0000000000804810 R11: 0000000000000202 R12: 00007f6fa100b6b8 [ 24.437199][ T977] R13: 00007f6fa100b090 R14: 00007f6fa100b0d0 R15: 0000000000804810 [ 24.445133][ T977] [ 24.451228][ T977] ================================================================================ [pid 974] <... mount resumed>) = ? [pid 976] <... mount resumed>) = ? [pid 976] +++ exited with 0 +++ [pid 972] +++ exited with 0 +++ [pid 974] +++ exited with 0 +++ [pid 973] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=972, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 977] <... mount resumed>) = ? [ 24.456739][ T976] EXT4-fs warning (device loop0): ext4_multi_mount_protect:385: Unable to create kmmpd thread for loop0. [ 24.462428][ T977] EXT4-fs (loop2): Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 24.487509][ T977] EXT4-fs (loop2): feature flags set on rev 0 fs, running e2fsck is recommended [ 24.494004][ T985] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 24.496708][ T977] EXT4-fs (loop2): Couldn't mount because of unsupported optional features (c0828) [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=973, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 410] <... restart_syscall resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 999 [pid 983] exit_group(0 [pid 986] <... futex resumed>) = ? [pid 983] <... exit_group resumed>) = ? [pid 986] +++ exited with 0 +++ ./strace-static-x86_64: Process 999 attached [pid 999] set_robust_list(0x5555564066e0, 24) = 0 [pid 999] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 999] setpgid(0, 0) = 0 [pid 999] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 999] write(3, "1000", 4) = 4 [pid 999] close(3) = 0 [pid 999] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 999] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 999] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 999] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1000], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1000 [pid 999] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 999] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 981] exit_group(0 [pid 989] <... futex resumed>) = ? [pid 981] <... exit_group resumed>) = ? [pid 989] +++ exited with 0 +++ [pid 985] <... mount resumed>) = ? [pid 982] <... mount resumed>) = -1 ENOTDIR (Not a directory) ./strace-static-x86_64: Process 1000 attached [pid 999] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 985] +++ exited with 0 +++ [pid 983] +++ exited with 0 +++ [pid 982] ioctl(5, LOOP_CLR_FD [pid 988] <... mount resumed>) = ? [pid 1000] set_robust_list(0x7f6fa100b9e0, 24 [pid 999] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1000] <... set_robust_list resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=983, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 999] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 999] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1001], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1001 [pid 999] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 988] +++ exited with 0 +++ [pid 981] +++ exited with 0 +++ [pid 1000] memfd_create("syzkaller", 0./strace-static-x86_64: Process 1001 attached [pid 999] <... futex resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=981, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 999] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1000] <... memfd_create resumed>) = 3 [pid 1000] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1001] set_robust_list(0x7f6fa0fea9e0, 24 [pid 412] <... openat resumed>) = 3 [pid 411] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 411] ioctl(3, LOOP_CLR_FD [pid 412] <... ioctl resumed>) = 0 [pid 411] <... ioctl resumed>) = 0 [pid 412] close(3 [pid 411] close(3 [pid 412] <... close resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1002 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1003 [pid 1001] <... set_robust_list resumed>) = 0 [pid 1001] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1001] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 999] <... futex resumed>) = 0 [pid 999] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 999] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1001] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1000] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1001] <... mount resumed>) = 0 [pid 1001] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 999] <... futex resumed>) = 0 [pid 999] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 999] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] <... openat resumed>) = 3 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1001] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1001] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 980] exit_group(0 [pid 984] <... futex resumed>) = ? [pid 980] <... exit_group resumed>) = ? [pid 984] +++ exited with 0 +++ [pid 999] <... futex resumed>) = 0 [pid 1001] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1003 attached [pid 1003] set_robust_list(0x5555564066e0, 24) = 0 [pid 1003] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1003] setpgid(0, 0) = 0 [pid 1003] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 999] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 999] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1003] <... openat resumed>) = 3 [pid 1003] write(3, "1000", 4) = 4 [pid 1003] close(3) = 0 [pid 1003] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1003] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1000] <... write resumed>) = 1048576 [pid 1001] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1002 attached [pid 1003] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1001] openat(-1, "/proc/self/exe", O_RDONLY [pid 1000] munmap(0x7f6f98bca000, 1048576 [pid 1002] set_robust_list(0x5555564066e0, 24 [pid 1003] <... mprotect resumed>) = 0 [pid 1001] <... openat resumed>) = 6 [pid 1003] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1000] <... munmap resumed>) = 0 [pid 1003] <... clone resumed>, parent_tid=[1004], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1004 [pid 1003] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1003] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1003] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1003] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1003] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1005], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1005 [pid 1003] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 1005 attached ./strace-static-x86_64: Process 1004 attached [pid 1003] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1002] <... set_robust_list resumed>) = 0 [pid 1001] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1000] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1002] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1001] <... futex resumed>) = 1 [pid 1000] <... openat resumed>) = 7 [pid 1001] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 999] <... futex resumed>) = 0 [pid 1005] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1004] set_robust_list(0x7f6fa100b9e0, 24 [pid 1002] <... prctl resumed>) = 0 [pid 1000] ioctl(7, LOOP_SET_FD, 3 [pid 999] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1005] <... set_robust_list resumed>) = 0 [pid 1004] <... set_robust_list resumed>) = 0 [pid 1002] setpgid(0, 0 [pid 1000] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 982] <... ioctl resumed>) = ? [pid 1004] memfd_create("syzkaller", 0 [pid 1002] <... setpgid resumed>) = 0 [pid 1001] <... futex resumed>) = 0 [pid 1000] ioctl(7, LOOP_CLR_FD [pid 999] <... futex resumed>) = 1 [pid 982] +++ exited with 0 +++ [pid 980] +++ exited with 0 +++ [pid 1005] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1004] <... memfd_create resumed>) = 3 [pid 1002] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1001] sendfile(5, 6, NULL, 140737974943952 [pid 1000] <... ioctl resumed>) = 0 [pid 999] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1005] <... open resumed>) = 4 [pid 1004] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1002] <... openat resumed>) = 3 [pid 1005] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1004] <... mmap resumed>) = 0x7f6f98bca000 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=980, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1005] <... futex resumed>) = 1 [pid 1002] write(3, "1000", 4 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1005] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] <... openat resumed>) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1006 [pid 1002] <... write resumed>) = 4 [pid 1002] close(3 [pid 1000] ioctl(7, LOOP_SET_FD, 3 [pid 1002] <... close resumed>) = 0 [pid 1000] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1002] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1000] close(7 [pid 1002] <... futex resumed>) = 0 [pid 1000] <... close resumed>) = 0 [pid 1002] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1000] close(3./strace-static-x86_64: Process 1006 attached [pid 1006] set_robust_list(0x5555564066e0, 24) = 0 [pid 1006] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1006] setpgid(0, 0) = 0 [pid 1006] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1000] <... close resumed>) = 0 [pid 1002] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1002] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [ 24.507504][ T982] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 24.526103][ T988] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1002] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1007], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1007 [pid 1002] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1002] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1002] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1002] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1002] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1006] <... openat resumed>) = 3 [pid 1006] write(3, "1000", 4 [pid 1002] <... clone resumed>, parent_tid=[1008], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1008 [pid 1002] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1002] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1001] <... sendfile resumed>) = 1048576 [pid 1000] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1006] <... write resumed>) = 4 [pid 1006] close(3) = 0 [pid 1006] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1006] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0./strace-static-x86_64: Process 1007 attached ./strace-static-x86_64: Process 1008 attached [pid 1004] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1003] <... futex resumed>) = 0 [pid 1001] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1000] <... futex resumed>) = 0 [pid 1001] <... futex resumed>) = 1 [pid 1000] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 999] <... futex resumed>) = 0 [pid 977] +++ exited with 0 +++ [pid 971] +++ exited with 0 +++ [pid 410] <... ioctl resumed>) = 0 [pid 1001] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 999] exit_group(0 [pid 410] close(3 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=971, si_uid=0, si_status=0, si_utime=0, si_stime=11} --- [pid 1008] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1007] set_robust_list(0x7f6fa100b9e0, 24 [pid 1006] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1004] <... write resumed>) = 1048576 [pid 1003] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1001] <... futex resumed>) = ? [pid 1000] <... futex resumed>) = ? [pid 999] <... exit_group resumed>) = ? [pid 410] <... close resumed>) = 0 [pid 1008] <... set_robust_list resumed>) = 0 [pid 1007] <... set_robust_list resumed>) = 0 [pid 1005] <... futex resumed>) = 0 [pid 1004] munmap(0x7f6f98bca000, 1048576 [pid 1001] +++ exited with 0 +++ [pid 1000] +++ exited with 0 +++ [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1009 attached [pid 1008] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1007] memfd_create("syzkaller", 0 [pid 1006] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1005] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1004] <... munmap resumed>) = 0 [pid 1003] <... futex resumed>) = 1 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1009] set_robust_list(0x5555564066e0, 24 [pid 1008] <... open resumed>) = 4 [pid 1007] <... memfd_create resumed>) = 3 [pid 1006] <... mprotect resumed>) = 0 [pid 1005] <... mount resumed>) = 0 [pid 1004] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1003] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1009 [pid 1009] <... set_robust_list resumed>) = 0 [pid 1008] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1007] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1006] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1005] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1004] <... openat resumed>) = 5 [pid 1003] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1008] <... futex resumed>) = 1 [pid 1007] <... mmap resumed>) = 0x7f6f98bca000 [pid 1005] <... futex resumed>) = 0 [pid 1004] ioctl(5, LOOP_SET_FD, 3 [pid 1003] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1002] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1010 attached [pid 1009] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1005] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1003] <... futex resumed>) = 0 [pid 1002] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1010] set_robust_list(0x7f6fa100b9e0, 24 [pid 1009] <... prctl resumed>) = 0 [pid 1010] <... set_robust_list resumed>) = 0 [pid 1009] setpgid(0, 0 [pid 1010] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1009] <... setpgid resumed>) = 0 [pid 1009] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1009] write(3, "1000", 4) = 4 [pid 1009] close(3) = 0 [pid 1009] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1009] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1009] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1009] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1011], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1011 [pid 1009] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1009] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1009] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1009] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1009] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1012], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1012 [pid 1009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1003] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1002] <... futex resumed>) = 0 [pid 1002] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1012 attached [pid 1012] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1012] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1011 attached [pid 1011] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1011] memfd_create("syzkaller", 0) = 4 [pid 1008] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1007] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1006] <... clone resumed>, parent_tid=[1010], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1010 [pid 1004] <... ioctl resumed>) = 0 [pid 1012] <... open resumed>) = 3 [pid 1005] <... open resumed>) = 6 [pid 1012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1011] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1008] <... mount resumed>) = 0 [pid 1006] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1005] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1004] close(3 [pid 1010] <... futex resumed>) = 0 [pid 1008] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1006] <... futex resumed>) = 1 [pid 1005] <... futex resumed>) = 1 [pid 1003] <... futex resumed>) = 0 [pid 1012] <... futex resumed>) = 1 [pid 1010] memfd_create("syzkaller", 0 [pid 1009] <... futex resumed>) = 0 [pid 1008] <... futex resumed>) = 1 [pid 1006] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1005] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1003] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1002] <... futex resumed>) = 0 [pid 1012] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1010] <... memfd_create resumed>) = 3 [pid 1009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1008] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1006] <... futex resumed>) = 0 [pid 1005] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1003] <... futex resumed>) = 0 [pid 1002] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1012] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1011] <... mmap resumed>) = 0x7f6f98bca000 [pid 1010] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1009] <... futex resumed>) = 0 [pid 1008] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1007] <... write resumed>) = 1048576 [pid 1006] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1005] openat(-1, "/proc/self/exe", O_RDONLY [pid 1004] <... close resumed>) = 0 [pid 1003] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1002] <... futex resumed>) = 0 [pid 1012] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1010] <... mmap resumed>) = 0x7f6f98beb000 [pid 1009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1008] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1006] <... mmap resumed>) = 0x7f6f98bca000 [pid 1005] <... openat resumed>) = 3 [pid 1002] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1006] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1007] munmap(0x7f6f98bca000, 1048576 [pid 1006] <... mprotect resumed>) = 0 [pid 1005] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1007] <... munmap resumed>) = 0 [pid 1006] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1004] mkdir("./bus", 0777 [pid 1007] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1006] <... clone resumed>, parent_tid=[1013], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1013 [pid 1004] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1006] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1004] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1006] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1005] <... futex resumed>) = 1 [pid 1003] <... futex resumed>) = 0 [pid 1003] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1005] sendfile(6, 3, NULL, 140737974943952 [pid 1003] <... futex resumed>) = 0 [pid 1003] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1013 attached [pid 1012] <... mount resumed>) = 0 [pid 1010] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1011] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1011] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1011] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 5 [pid 1011] ioctl(5, LOOP_SET_FD, 4 [pid 1013] set_robust_list(0x7f6f98bea9e0, 24 [pid 1012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1010] <... write resumed>) = 1048576 [pid 1008] <... open resumed>) = 5 [pid 1007] <... openat resumed>) = 6 [pid 999] +++ exited with 0 +++ [pid 1008] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [ 24.598339][ T1004] loop4: detected capacity change from 0 to 2048 [ 24.618483][ T1005] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 24.622712][ T1011] loop3: detected capacity change from 0 to 2048 [ 24.633114][ T1004] EXT4-fs (loop4): Magic mismatch, very weird! [ 24.641186][ T1007] loop5: detected capacity change from 0 to 2048 [pid 1007] ioctl(6, LOOP_SET_FD, 3 [pid 1013] <... set_robust_list resumed>) = 0 [pid 1012] <... futex resumed>) = 1 [pid 1011] <... ioctl resumed>) = 0 [pid 1010] munmap(0x7f6f98beb000, 1048576 [pid 1009] <... futex resumed>) = 0 [pid 1008] <... futex resumed>) = 1 [pid 1004] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1002] <... futex resumed>) = 0 [pid 1008] openat(-1, "/proc/self/exe", O_RDONLY [pid 1002] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1008] <... openat resumed>) = 7 [pid 1002] <... futex resumed>) = 0 [pid 1008] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1002] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1008] <... futex resumed>) = 0 [pid 1002] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1008] sendfile(5, 7, NULL, 140737974943952 [pid 1002] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1013] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1012] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1011] close(4 [pid 1010] <... munmap resumed>) = 0 [pid 1009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1007] <... ioctl resumed>) = 0 [pid 1005] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1004] ioctl(5, LOOP_CLR_FD [pid 1002] <... futex resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=999, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1013] <... open resumed>) = 4 [pid 1012] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1011] <... close resumed>) = 0 [pid 1010] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1009] <... futex resumed>) = 0 [pid 1004] <... ioctl resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1013] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1012] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1011] mkdir("./bus", 0777 [pid 1010] <... openat resumed>) = 5 [pid 1009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1004] close(5 [pid 407] <... openat resumed>) = 3 [pid 1013] <... futex resumed>) = 1 [pid 1012] <... open resumed>) = 4 [pid 1011] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1010] ioctl(5, LOOP_SET_FD, 3 [pid 1006] <... futex resumed>) = 0 [pid 1004] <... close resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1013] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1011] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1006] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1004] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1003] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1002] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... ioctl resumed>) = 0 [pid 1006] <... futex resumed>) = 0 [pid 1012] <... futex resumed>) = 1 [pid 1009] <... futex resumed>) = 0 [pid 1006] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1004] <... futex resumed>) = 0 [pid 407] close(3 [pid 1013] <... mount resumed>) = 0 [pid 1012] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1004] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 407] <... close resumed>) = 0 [pid 1013] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1012] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1009] <... futex resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1013] <... futex resumed>) = 1 [pid 1012] openat(-1, "/proc/self/exe", O_RDONLY [pid 1009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1006] <... futex resumed>) = 0 [pid 1013] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1012] <... openat resumed>) = 6 [pid 1006] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1014 [pid 1013] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1006] <... futex resumed>) = 0 [pid 1013] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1012] <... futex resumed>) = 1 [pid 1009] <... futex resumed>) = 0 [pid 1006] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1012] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1012] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1009] <... futex resumed>) = 0 [pid 1012] sendfile(4, 6, NULL, 140737974943952 [pid 1009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1014 attached [pid 1010] <... ioctl resumed>) = 0 [pid 1008] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1007] close(3 [pid 1005] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1014] set_robust_list(0x5555564066e0, 24 [pid 1007] <... close resumed>) = 0 [pid 1005] <... futex resumed>) = 0 [pid 1014] <... set_robust_list resumed>) = 0 [pid 1007] mkdir("./bus", 0777 [pid 1005] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1014] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1007] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1014] <... prctl resumed>) = 0 [pid 1007] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1014] setpgid(0, 0) = 0 [pid 1014] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1014] write(3, "1000", 4) = 4 [pid 1014] close(3) = 0 [pid 1014] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1014] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1014] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1014] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1015], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1015 [pid 1014] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1014] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1014] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1014] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1014] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1016], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1016 [pid 1014] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1014] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1010] close(3) = 0 [pid 1010] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1010] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1012] <... sendfile resumed>) = 1048576 [pid 1012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1012] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1013] <... open resumed>) = 6 [pid 1013] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1013] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1009] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1008] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1008] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1003] exit_group(0 [pid 1005] <... futex resumed>) = ? [pid 1003] <... exit_group resumed>) = ? [pid 1005] +++ exited with 0 +++ ./strace-static-x86_64: Process 1015 attached [pid 1015] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1015] memfd_create("syzkaller", 0) = 3 [pid 1015] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1006] <... futex resumed>) = 0 [pid 1004] <... futex resumed>) = ? [ 24.642861][ T1005] File: /root/bus PID: 1005 Comm: syz-executor138 [ 24.649668][ T92] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.657558][ T1010] loop1: detected capacity change from 0 to 2048 [ 24.665941][ T92] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 24.683991][ T1011] EXT4-fs (loop3): Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [pid 1002] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1016 attached [pid 1006] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1013] <... futex resumed>) = 0 [pid 1006] <... futex resumed>) = 1 [pid 1013] openat(-1, "/proc/self/exe", O_RDONLY [pid 1006] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1013] <... openat resumed>) = 3 [pid 1013] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1006] <... futex resumed>) = 0 [pid 1013] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1006] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1013] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1006] <... futex resumed>) = 0 [pid 1013] sendfile(6, 3, NULL, 140737974943952 [pid 1006] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1015] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1015] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1015] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1016] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 409] <... openat resumed>) = 3 [pid 409] ioctl(3, LOOP_CLR_FD [pid 1016] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1013] <... sendfile resumed>) = 1048576 [pid 1013] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1006] <... futex resumed>) = 0 [pid 1013] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1010] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1010] ioctl(5, LOOP_CLR_FD) = 0 [pid 1010] close(5) = 0 [pid 1010] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1010] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1016] <... open resumed>) = 5 [pid 1016] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1014] <... futex resumed>) = 0 [pid 1006] exit_group(0 [pid 1016] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1014] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1013] <... futex resumed>) = ? [pid 1006] <... exit_group resumed>) = ? [pid 1016] <... mount resumed>) = 0 [pid 1014] <... futex resumed>) = 0 [pid 1013] +++ exited with 0 +++ [pid 1016] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1014] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1016] <... futex resumed>) = 0 [pid 1014] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1016] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1014] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1014] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1010] <... futex resumed>) = ? [pid 1010] +++ exited with 0 +++ [pid 1006] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1006, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 408] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 1011] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1011] ioctl(5, LOOP_CLR_FD) = 0 [pid 1011] close(5) = 0 [pid 1011] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1011] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1019 [pid 1009] exit_group(0 [pid 1012] <... futex resumed>) = ? [pid 1009] <... exit_group resumed>) = ? [pid 1012] +++ exited with 0 +++ [pid 1011] <... futex resumed>) = ? ./strace-static-x86_64: Process 1019 attached [pid 1019] set_robust_list(0x5555564066e0, 24) = 0 [pid 1019] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1019] setpgid(0, 0) = 0 [pid 1007] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1019] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1019] write(3, "1000", 4) = 4 [pid 1019] close(3) = 0 [pid 1019] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1019] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1019] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1019] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1020], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1020 [pid 1019] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1019] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1019] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1019] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1019] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1021], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1021 [pid 1007] ioctl(6, LOOP_CLR_FD [pid 1019] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1007] <... ioctl resumed>) = 0 [pid 1007] close(6 [pid 1019] <... futex resumed>) = 0 [pid 1019] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1021 attached [pid 1021] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1021] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1020 attached [pid 1020] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1020] memfd_create("syzkaller", 0) = 4 [pid 1007] <... close resumed>) = 0 [pid 1007] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1007] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1002] exit_group(0 [pid 1008] <... futex resumed>) = ? [pid 1002] <... exit_group resumed>) = ? [pid 1008] +++ exited with 0 +++ [pid 1007] <... futex resumed>) = ? [pid 1020] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1020] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1020] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1020] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 5 [pid 1020] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1020] ioctl(5, LOOP_CLR_FD) = 0 [pid 1020] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1020] close(5) = 0 [pid 1020] close(4) = 0 [pid 1020] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1020] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1015] <... openat resumed>) = 4 [pid 1004] +++ exited with 0 +++ [pid 1021] <... open resumed>) = 3 [pid 1016] <... open resumed>) = 6 [pid 1003] +++ exited with 0 +++ [pid 409] <... ioctl resumed>) = 0 [pid 1021] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1016] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1015] ioctl(4, LOOP_SET_FD, 3 [pid 409] close(3 [pid 1021] <... futex resumed>) = 1 [pid 1019] <... futex resumed>) = 0 [pid 1016] <... futex resumed>) = 1 [pid 1014] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1003, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 409] <... close resumed>) = 0 [pid 1021] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1019] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1016] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1014] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [ 24.696678][ T1011] EXT4-fs (loop3): feature flags set on rev 0 fs, running e2fsck is recommended [ 24.706498][ T1010] EXT4-fs warning (device loop1): read_mmp_block:107: Error -117 while reading MMP block 64 [ 24.708515][ T1011] EXT4-fs (loop3): Couldn't mount because of unsupported optional features (c0828) [ 24.726399][ T1007] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1019] <... futex resumed>) = 1 [pid 1016] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1014] <... futex resumed>) = 0 [pid 1020] <... futex resumed>) = 0 [pid 1015] <... ioctl resumed>) = 0 [pid 1019] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1016] openat(-1, "/proc/self/exe", O_RDONLY [pid 1014] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1011] +++ exited with 0 +++ [pid 1009] +++ exited with 0 +++ [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1022 [pid 1016] <... openat resumed>) = 7 [pid 1016] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1014] <... futex resumed>) = 0 [pid 1016] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1014] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1016] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1014] <... futex resumed>) = 0 [pid 1016] sendfile(6, 7, NULL, 140737974943952 [pid 1014] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1016] <... sendfile resumed>) = 1048576 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1016] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1014] <... futex resumed>) = 0 [pid 1016] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1015] close(3) = 0 [pid 1015] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1015] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1009, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 1020] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 410] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 1022 attached [pid 1020] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1022] set_robust_list(0x5555564066e0, 24 [pid 410] <... restart_syscall resumed>) = 0 [pid 1020] <... futex resumed>) = 1 [pid 1019] <... futex resumed>) = 0 [pid 1019] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1019] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1022] <... set_robust_list resumed>) = 0 [pid 1022] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1022] setpgid(0, 0) = 0 [pid 1022] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1020] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1022] write(3, "1000", 4) = 4 [pid 1022] close(3) = 0 [pid 1022] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1022] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1022] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1022] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1020] <... open resumed>) = 4 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1022] <... clone resumed>, parent_tid=[1023], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1023 [pid 1022] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1022] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1022] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1022] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1022] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1024], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1024 [pid 1022] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1022] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1015] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1015] ioctl(4, LOOP_CLR_FD) = 0 [pid 1015] close(4) = 0 [pid 1015] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1015] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1024 attached [pid 1024] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1024] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1014] exit_group(0 [pid 1016] <... futex resumed>) = ? [pid 1014] <... exit_group resumed>) = ? [pid 1016] +++ exited with 0 +++ [pid 1015] <... futex resumed>) = ? [pid 410] <... openat resumed>) = 3 [pid 1020] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1020] <... futex resumed>) = 1 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1020] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 410] close(3 [pid 1019] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 1019] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1020] <... futex resumed>) = 0 [pid 1019] <... futex resumed>) = 1 [pid 1020] openat(-1, "/proc/self/exe", O_RDONLY [pid 1019] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1020] <... openat resumed>) = 5 [pid 1020] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1019] <... futex resumed>) = 0 [pid 1020] sendfile(4, 5, NULL, 140737974943952 [pid 1019] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1025 [pid 1019] <... futex resumed>) = 0 [pid 1019] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1023 attached [pid 1024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1020] <... sendfile resumed>) = 1048576 [pid 1020] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1019] <... futex resumed>) = 0 [pid 1020] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1019] exit_group(0 [pid 1021] <... futex resumed>) = ? [pid 1020] <... futex resumed>) = ? [pid 1019] <... exit_group resumed>) = ? [pid 1021] +++ exited with 0 +++ [pid 1020] +++ exited with 0 +++ [pid 1019] +++ exited with 0 +++ ./strace-static-x86_64: Process 1025 attached [pid 1024] <... futex resumed>) = 1 [pid 1023] set_robust_list(0x7f6fa100b9e0, 24 [pid 1022] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1019, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1024] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1023] <... set_robust_list resumed>) = 0 [pid 1022] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 1022] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 1023] memfd_create("syzkaller", 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1026 attached , child_tidptr=0x5555564066d0) = 1026 [pid 1026] set_robust_list(0x5555564066e0, 24) = 0 [pid 1026] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1026] setpgid(0, 0) = 0 [pid 1026] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1026] write(3, "1000", 4) = 4 [pid 1026] close(3) = 0 [pid 1026] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1026] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1026] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1026] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1027], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1027 [pid 1026] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1026] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1026] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1026] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1026] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1028], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1028 [pid 1026] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1026] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1028 attached [pid 1028] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1028] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1028] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1026] <... futex resumed>) = 0 [pid 1026] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1026] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1028] <... futex resumed>) = 1 [pid 1028] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1028] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1026] <... futex resumed>) = 0 [pid 1026] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1026] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1028] <... futex resumed>) = 1 [pid 1028] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1023] <... memfd_create resumed>) = 4 [pid 1028] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1023] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1026] <... futex resumed>) = 0 [pid 1026] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1026] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1028] <... futex resumed>) = 1 [pid 1028] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1028] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1026] <... futex resumed>) = 0 [pid 1026] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1026] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1028] <... futex resumed>) = 1 [pid 1028] sendfile(4, 5, NULL, 140737974943952 [pid 1024] <... mount resumed>) = 0 [pid 1024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1027 attached [pid 1028] <... sendfile resumed>) = 1048576 [pid 1007] +++ exited with 0 +++ [pid 1002] +++ exited with 0 +++ [pid 411] <... openat resumed>) = 3 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1002, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1024] <... futex resumed>) = 1 [pid 1022] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 1024] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] <... openat resumed>) = 3 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1022] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1028] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1026] <... futex resumed>) = 0 [pid 1028] <... futex resumed>) = 1 [pid 1028] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1029 [pid 1024] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1022] <... futex resumed>) = 0 [pid 412] close(3 [pid 1024] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1022] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1027] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1027] memfd_create("syzkaller", 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1030 [pid 1027] <... memfd_create resumed>) = 6 [pid 1025] set_robust_list(0x5555564066e0, 24 [pid 1027] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1024] <... open resumed>) = 5 [pid 1024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1022] <... futex resumed>) = 0 [pid 1024] openat(-1, "/proc/self/exe", O_RDONLY [pid 1022] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1024] <... openat resumed>) = 6 [pid 1022] <... futex resumed>) = 0 [pid 1022] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1022] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1024] sendfile(5, 6, NULL, 140737974943952 [pid 1022] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1024] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1022] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1022] <... futex resumed>) = 0 [ 24.759522][ T1015] loop0: detected capacity change from 0 to 2048 [ 24.774683][ T1015] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 1024] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1025] <... set_robust_list resumed>) = 0 [pid 1015] +++ exited with 0 +++ [pid 1014] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1014, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 407] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 1025] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1025] <... prctl resumed>) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1031 [pid 1025] setpgid(0, 0./strace-static-x86_64: Process 1030 attached ./strace-static-x86_64: Process 1029 attached [pid 1023] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1025] <... setpgid resumed>) = 0 [pid 1025] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1025] write(3, "1000", 4 [pid 1030] set_robust_list(0x5555564066e0, 24) = 0 [pid 1025] <... write resumed>) = 4 [pid 1030] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1025] close(3) = 0 [pid 1025] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1025] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1030] <... prctl resumed>) = 0 [pid 1025] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1030] setpgid(0, 0) = 0 [pid 1025] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1023] <... write resumed>) = 1048576 [pid 1030] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1029] set_robust_list(0x5555564066e0, 24 [pid 1025] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1023] munmap(0x7f6f98bca000, 1048576 [pid 1025] <... clone resumed>, parent_tid=[1032], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1032 [pid 1025] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1025] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1025] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1025] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1025] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1030] write(3, "1000", 4 [pid 1029] <... set_robust_list resumed>) = 0 [pid 1023] <... munmap resumed>) = 0 [pid 1030] <... write resumed>) = 4 [pid 1030] close(3 [pid 1029] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1023] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1030] <... close resumed>) = 0 [pid 1029] <... prctl resumed>) = 0 [pid 1030] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1029] setpgid(0, 0 [pid 1023] <... openat resumed>) = 7 [pid 1030] <... futex resumed>) = 0 [pid 1029] <... setpgid resumed>) = 0 [pid 1023] ioctl(7, LOOP_SET_FD, 4 [pid 1030] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0./strace-static-x86_64: Process 1031 attached ) = 0x7f6fa0feb000 [pid 1029] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1027] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1025] <... clone resumed>, parent_tid=[1033], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1033 [pid 1031] set_robust_list(0x5555564066e0, 24 [pid 1025] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1031] <... set_robust_list resumed>) = 0 [pid 1025] <... futex resumed>) = 0 [pid 1031] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1025] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1031] <... prctl resumed>) = 0 [pid 1031] setpgid(0, 0) = 0 [pid 1031] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1031] write(3, "1000", 4) = 4 ./strace-static-x86_64: Process 1032 attached [pid 1031] close(3 [pid 1032] set_robust_list(0x7f6fa100b9e0, 24 [pid 1031] <... close resumed>) = 0 [pid 1032] <... set_robust_list resumed>) = 0 [pid 1031] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1033 attached [pid 1032] memfd_create("syzkaller", 0 [pid 1031] <... futex resumed>) = 0 [pid 1033] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1032] <... memfd_create resumed>) = 3 [pid 1031] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1033] <... set_robust_list resumed>) = 0 [pid 1032] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1031] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1033] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1032] <... mmap resumed>) = 0x7f6f98bca000 [pid 1031] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1033] <... open resumed>) = 4 [pid 1032] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1031] <... mprotect resumed>) = 0 [pid 1030] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1029] <... openat resumed>) = 3 [pid 1023] <... ioctl resumed>) = 0 [pid 1033] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1031] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1030] <... mprotect resumed>) = 0 [pid 1029] write(3, "1000", 4 [pid 1033] <... futex resumed>) = 1 [pid 1030] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1029] <... write resumed>) = 4 [pid 1025] <... futex resumed>) = 0 [pid 1033] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1031] <... clone resumed>, parent_tid=[1034], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1034 [pid 1029] close(3 [pid 1025] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1033] <... mount resumed>) = 0 [pid 1031] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1030] <... clone resumed>, parent_tid=[1035], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1035 [pid 1029] <... close resumed>) = 0 [pid 1025] <... futex resumed>) = 0 [pid 1033] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1031] <... futex resumed>) = 0 [pid 1030] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1029] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1025] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1033] <... futex resumed>) = 0 [pid 1031] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1030] <... futex resumed>) = 0 [pid 1029] <... futex resumed>) = 0 [pid 1025] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1033] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1031] <... futex resumed>) = 0 [pid 1030] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1029] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1025] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1033] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1031] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1030] <... futex resumed>) = 0 [pid 1029] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1025] <... futex resumed>) = 0 [pid 1023] close(4 [pid 1033] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1031] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1030] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1029] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1025] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1033] <... open resumed>) = 5 [pid 1031] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1030] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1029] <... mprotect resumed>) = 0 [pid 1023] <... close resumed>) = 0 ./strace-static-x86_64: Process 1034 attached [pid 1033] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1031] <... mprotect resumed>) = 0 [pid 1030] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1029] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1023] mkdir("./bus", 0777./strace-static-x86_64: Process 1035 attached [pid 1034] set_robust_list(0x7f6fa100b9e0, 24 [pid 1033] <... futex resumed>) = 1 [pid 1032] <... write resumed>) = 1048576 [pid 1031] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1030] <... mprotect resumed>) = 0 [pid 1027] <... write resumed>) = 1048576 [pid 1025] <... futex resumed>) = 0 [pid 1023] <... mkdir resumed>) = -1 EEXIST (File exists) ./strace-static-x86_64: Process 1036 attached [pid 1035] set_robust_list(0x7f6fa100b9e0, 24 [pid 1034] <... set_robust_list resumed>) = 0 [pid 1033] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1030] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1029] <... clone resumed>, parent_tid=[1036], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1036 [pid 1027] munmap(0x7f6f98bca000, 1048576 [pid 1025] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1023] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1035] <... set_robust_list resumed>) = 0 [pid 1034] memfd_create("syzkaller", 0 [pid 1033] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1031] <... clone resumed>, parent_tid=[1037], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1037 [pid 1029] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1025] <... futex resumed>) = 0 [pid 1036] set_robust_list(0x7f6fa100b9e0, 24 [pid 1035] memfd_create("syzkaller", 0 [pid 1034] <... memfd_create resumed>) = 3 [pid 1033] openat(-1, "/proc/self/exe", O_RDONLY [pid 1031] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1030] <... clone resumed>, parent_tid=[1038], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1038 [pid 1029] <... futex resumed>) = 0 [pid 1027] <... munmap resumed>) = 0 [pid 1025] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1036] <... set_robust_list resumed>) = 0 [pid 1035] <... memfd_create resumed>) = 3 [pid 1034] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1033] <... openat resumed>) = 6 [pid 1031] <... futex resumed>) = 0 [pid 1030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1029] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1027] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1033] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1031] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1030] <... futex resumed>) = 0 [pid 1029] <... futex resumed>) = 0 [pid 1027] <... openat resumed>) = 7 ./strace-static-x86_64: Process 1038 attached [pid 1036] memfd_create("syzkaller", 0 [pid 1035] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1034] <... mmap resumed>) = 0x7f6f98bca000 [pid 1033] <... futex resumed>) = 1 [pid 1030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1029] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1027] ioctl(7, LOOP_SET_FD, 6 [pid 1025] <... futex resumed>) = 0 [pid 1038] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1036] <... memfd_create resumed>) = 3 [pid 1035] <... mmap resumed>) = 0x7f6f98bca000 [pid 1034] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1033] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1025] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1037 attached [pid 1038] <... set_robust_list resumed>) = 0 [pid 1036] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1035] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1033] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1032] munmap(0x7f6f98bca000, 1048576 [pid 1029] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1027] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1025] <... futex resumed>) = 0 [pid 1038] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1037] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1036] <... mmap resumed>) = 0x7f6f98bca000 [pid 1033] sendfile(5, 6, NULL, 140737974943952 [pid 1032] <... munmap resumed>) = 0 [pid 1029] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1027] ioctl(7, LOOP_CLR_FD [pid 1025] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1037] <... set_robust_list resumed>) = 0 [pid 1033] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1032] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1037] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1033] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1032] <... openat resumed>) = 7 [pid 1037] <... open resumed>) = 4 [pid 1033] <... futex resumed>) = 1 [pid 1025] <... futex resumed>) = 0 [pid 1033] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1037] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1032] ioctl(7, LOOP_SET_FD, 3 [pid 1037] <... futex resumed>) = 1 [pid 1036] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1031] <... futex resumed>) = 0 [pid 1029] <... mprotect resumed>) = 0 [pid 1027] <... ioctl resumed>) = 0 [pid 1031] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1031] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1037] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1029] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1041], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1041 [pid 1029] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1037] <... mount resumed>) = 0 [pid 1029] <... futex resumed>) = 0 [pid 1029] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1037] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1031] <... futex resumed>) = 0 [ 24.833854][ T1023] loop2: detected capacity change from 0 to 2048 [ 24.873021][ T1032] loop3: detected capacity change from 0 to 2048 [pid 1037] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1034] <... write resumed>) = 1048576 [pid 1031] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1037] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1035] <... write resumed>) = 1048576 [pid 1031] <... futex resumed>) = 0 [pid 1037] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1031] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1037] <... open resumed>) = 5 [pid 1034] munmap(0x7f6f98bca000, 1048576 [pid 1037] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1034] <... munmap resumed>) = 0 [pid 1037] <... futex resumed>) = 1 [pid 1035] munmap(0x7f6f98bca000, 1048576 [pid 1034] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1031] <... futex resumed>) = 0 [pid 1037] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1035] <... munmap resumed>) = 0 [pid 1034] <... openat resumed>) = 6 [pid 1031] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1037] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1035] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1034] ioctl(6, LOOP_SET_FD, 3 [pid 1031] <... futex resumed>) = 0 [pid 1037] openat(-1, "/proc/self/exe", O_RDONLY [pid 1036] <... write resumed>) = 1048576 [pid 1035] <... openat resumed>) = 5 [pid 1031] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1037] <... openat resumed>) = 7 [pid 1035] ioctl(5, LOOP_SET_FD, 3 [pid 1027] ioctl(7, LOOP_SET_FD, 6./strace-static-x86_64: Process 1041 attached [pid 1037] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1036] munmap(0x7f6f98bca000, 1048576 [pid 1030] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1027] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1037] <... futex resumed>) = 1 [pid 1031] <... futex resumed>) = 0 [pid 1037] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1036] <... munmap resumed>) = 0 [pid 1031] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1030] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1027] close(7 [pid 1041] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1037] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1036] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1031] <... futex resumed>) = 0 [pid 1030] <... futex resumed>) = 0 [pid 1027] <... close resumed>) = 0 [pid 1041] <... set_robust_list resumed>) = 0 [pid 1037] sendfile(5, 7, NULL, 140737974943952 [pid 1036] <... openat resumed>) = 4 [pid 1031] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1030] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1027] close(6 [pid 1041] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1037] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1036] ioctl(4, LOOP_SET_FD, 3 [pid 1030] <... mmap resumed>) = 0x7f6f98ca9000 [pid 1027] <... close resumed>) = 0 [pid 1038] <... open resumed>) = 4 [pid 1037] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1035] <... ioctl resumed>) = 0 [pid 1034] <... ioctl resumed>) = 0 [pid 1032] <... ioctl resumed>) = 0 [pid 1030] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE [pid 1023] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1038] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1037] <... futex resumed>) = 1 [pid 1035] close(3 [pid 1034] close(3 [pid 1032] close(3 [pid 1031] <... futex resumed>) = 0 [pid 1023] ioctl(7, LOOP_CLR_FD [pid 1037] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1035] <... close resumed>) = 0 [pid 1034] <... close resumed>) = 0 [pid 1032] <... close resumed>) = 0 [pid 1023] <... ioctl resumed>) = 0 [pid 1035] mkdir("./bus", 0777 [pid 1034] mkdir("./bus", 0777 [pid 1032] mkdir("./bus", 0777 [pid 1023] close(7 [pid 1038] <... futex resumed>) = 0 [pid 1035] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1034] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1032] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1030] <... mprotect resumed>) = 0 [pid 1023] <... close resumed>) = 0 [pid 1035] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1034] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1032] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1023] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1038] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1030] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1029] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1023] <... futex resumed>) = 0 [pid 1027] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1023] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1029] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1026] exit_group(0 [pid 1028] <... futex resumed>) = ? [pid 1026] <... exit_group resumed>) = ? [pid 1028] +++ exited with 0 +++ ./strace-static-x86_64: Process 1042 attached [pid 1042] set_robust_list(0x7f6f98cc99e0, 24) = 0 [pid 1042] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1041] <... open resumed>) = 5 [pid 1030] <... clone resumed>, parent_tid=[1042], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 1042 [pid 1029] <... futex resumed>) = 0 [pid 1022] exit_group(0 [pid 1041] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1030] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1029] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1027] <... futex resumed>) = ? [pid 1024] <... futex resumed>) = ? [pid 1023] <... futex resumed>) = ? [pid 1022] <... exit_group resumed>) = ? [pid 1041] <... futex resumed>) = 0 [pid 1030] <... futex resumed>) = 1 [pid 1029] <... mmap resumed>) = 0x7f6f98ca9000 [pid 1027] +++ exited with 0 +++ [pid 1026] +++ exited with 0 +++ [pid 1024] +++ exited with 0 +++ [pid 1023] +++ exited with 0 +++ [pid 1042] <... futex resumed>) = 0 [pid 1041] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1042] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1029] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1026, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1042] <... mount resumed>) = 0 [pid 1030] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1029] <... mprotect resumed>) = 0 [pid 1042] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1029] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1042] <... futex resumed>) = 1 [pid 1030] <... futex resumed>) = 0 [pid 1042] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1029] <... clone resumed>, parent_tid=[1046], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 1046 [pid 1038] <... futex resumed>) = 0 [pid 1030] <... futex resumed>) = 1 [pid 1029] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1038] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1029] <... futex resumed>) = 0 [pid 1038] <... open resumed>) = 3 [pid 1029] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1038] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1030] <... futex resumed>) = 0 [pid 1038] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1038] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1030] <... futex resumed>) = 0 [pid 1038] openat(-1, "/proc/self/exe", O_RDONLY [pid 1030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1038] <... openat resumed>) = 6 [pid 1038] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1030] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1038] <... futex resumed>) = 0 [pid 1030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1038] sendfile(3, 6, NULL, 140737974943952 [pid 1030] <... futex resumed>) = 0 [ 24.888914][ T1023] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 24.892962][ T1034] loop0: detected capacity change from 0 to 2048 [ 24.907603][ T1035] loop5: detected capacity change from 0 to 2048 [ 24.921582][ T1036] loop4: detected capacity change from 0 to 2048 [pid 1030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1036] <... ioctl resumed>) = 0 [pid 1036] close(3) = 0 [pid 1036] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1036] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1046 attached [pid 1038] <... sendfile resumed>) = 1048576 [pid 1038] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1022] +++ exited with 0 +++ [pid 408] <... openat resumed>) = 3 [pid 1038] <... futex resumed>) = 1 [pid 1030] <... futex resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1038] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1022, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1050 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1051 ./strace-static-x86_64: Process 1050 attached [pid 1046] set_robust_list(0x7f6f98cc99e0, 24 [pid 1032] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1032] ioctl(7, LOOP_CLR_FD) = 0 [pid 1032] close(7) = 0 [pid 1032] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1025] exit_group(0 [pid 1033] <... futex resumed>) = ? [pid 1025] <... exit_group resumed>) = ? [pid 1033] +++ exited with 0 +++ [pid 1032] <... futex resumed>) = ? ./strace-static-x86_64: Process 1051 attached [ 24.953250][ T1032] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 24.970027][ T1044] EXT4-fs warning (device loop5): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 24.982011][ T1035] EXT4-fs (loop5): get root inode failed [ 24.993191][ T1035] EXT4-fs (loop5): mount failed [pid 1051] set_robust_list(0x5555564066e0, 24 [pid 1050] set_robust_list(0x5555564066e0, 24 [pid 1046] <... set_robust_list resumed>) = 0 [pid 1029] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1046] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1029] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1046] <... mount resumed>) = 0 [pid 1041] <... futex resumed>) = 0 [pid 1029] <... futex resumed>) = 1 [pid 1046] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1041] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1029] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1046] <... futex resumed>) = 0 [pid 1041] <... open resumed>) = 3 [pid 1046] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1041] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1029] <... futex resumed>) = 0 [pid 1041] openat(-1, "/proc/self/exe", O_RDONLY [pid 1029] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] <... set_robust_list resumed>) = 0 [pid 1041] <... openat resumed>) = 6 [pid 1029] <... futex resumed>) = 0 [pid 1050] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1041] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1029] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1050] <... prctl resumed>) = 0 [pid 1041] <... futex resumed>) = 0 [pid 1029] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1050] setpgid(0, 0 [pid 1041] sendfile(3, 6, NULL, 140737974943952 [pid 1029] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] <... setpgid resumed>) = 0 [pid 1029] <... futex resumed>) = 0 [pid 1050] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1029] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1050] <... openat resumed>) = 3 [pid 1051] <... set_robust_list resumed>) = 0 [pid 1051] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1051] setpgid(0, 0) = 0 [pid 1051] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1050] write(3, "1000", 4 [pid 1041] <... sendfile resumed>) = 1048576 [pid 1035] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1041] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1029] <... futex resumed>) = 0 [pid 1041] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1051] <... openat resumed>) = 3 [pid 1050] <... write resumed>) = 4 [pid 1035] ioctl(5, LOOP_CLR_FD [pid 1051] write(3, "1000", 4 [pid 1050] close(3 [pid 1035] <... ioctl resumed>) = 0 [pid 1051] <... write resumed>) = 4 [pid 1050] <... close resumed>) = 0 [pid 1036] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1035] close(5 [pid 1034] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1032] +++ exited with 0 +++ [pid 1025] +++ exited with 0 +++ [pid 1051] close(3 [pid 1050] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1036] ioctl(4, LOOP_CLR_FD [pid 1035] <... close resumed>) = 0 [pid 1034] ioctl(6, LOOP_CLR_FD [pid 1051] <... close resumed>) = 0 [pid 1050] <... futex resumed>) = 0 [pid 1036] <... ioctl resumed>) = 0 [pid 1035] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1030] exit_group(0 [pid 1036] close(4 [pid 1035] <... futex resumed>) = 230 [pid 1051] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1042] <... futex resumed>) = ? [pid 1038] <... futex resumed>) = ? [pid 1036] <... close resumed>) = 0 [pid 1034] <... ioctl resumed>) = 0 [pid 1030] <... exit_group resumed>) = ? [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1025, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1051] <... futex resumed>) = 0 [pid 1050] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1042] +++ exited with 0 +++ [pid 1038] +++ exited with 0 +++ [pid 1035] +++ exited with 0 +++ [pid 1036] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1034] close(6) = 0 [pid 1034] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1034] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1030] +++ exited with 0 +++ [pid 1036] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1030, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1051] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1050] <... mprotect resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1051] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1050] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1031] exit_group(0 [pid 1029] exit_group(0 [pid 1051] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 410] <... openat resumed>) = 3 [pid 1051] <... mprotect resumed>) = 0 [pid 1046] <... futex resumed>) = ? [pid 1041] <... futex resumed>) = ? [pid 1037] <... futex resumed>) = ? [pid 1036] <... futex resumed>) = ? [pid 1034] <... futex resumed>) = ? [pid 1031] <... exit_group resumed>) = ? [pid 1029] <... exit_group resumed>) = ? [pid 410] ioctl(3, LOOP_CLR_FD [pid 1051] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1050] <... clone resumed>, parent_tid=[1054], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1054 [pid 1046] +++ exited with 0 +++ [pid 1041] +++ exited with 0 +++ [pid 1037] +++ exited with 0 +++ [pid 1036] +++ exited with 0 +++ [pid 1034] +++ exited with 0 +++ [pid 1050] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1031] +++ exited with 0 +++ [pid 410] <... ioctl resumed>) = 0 [pid 1051] <... clone resumed>, parent_tid=[1055], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1055 [pid 1050] <... futex resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1051] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] close(3 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1031, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1051] <... futex resumed>) = 0 [pid 1050] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 410] <... close resumed>) = 0 [pid 1051] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1051] <... futex resumed>) = 0 [pid 1050] <... mmap resumed>) = 0x7f6fa0fca000 [pid 412] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1055 attached [pid 1051] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1050] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 412] close(3 [pid 1051] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1050] <... mprotect resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1056 [pid 1051] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1050] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1055] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1055] memfd_create("syzkaller", 0 [pid 1051] <... mprotect resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1057 [pid 1051] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1050] <... clone resumed>, parent_tid=[1058], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1058 [pid 1050] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1051] <... clone resumed>, parent_tid=[1059], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1059 [pid 1050] <... futex resumed>) = 0 [pid 1051] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1051] <... futex resumed>) = 0 [pid 1051] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1055] <... memfd_create resumed>) = 3 [pid 1055] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1055] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1057 attached ./strace-static-x86_64: Process 1058 attached ./strace-static-x86_64: Process 1056 attached ./strace-static-x86_64: Process 1054 attached [pid 1057] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 1059 attached [pid 1058] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1056] set_robust_list(0x5555564066e0, 24 [pid 1054] set_robust_list(0x7f6fa100b9e0, 24 [pid 1058] <... set_robust_list resumed>) = 0 [pid 1054] <... set_robust_list resumed>) = 0 [pid 1056] <... set_robust_list resumed>) = 0 [ 24.998948][ T1034] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 25.013724][ T1052] EXT4-fs warning (device loop4): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 25.023165][ T1036] EXT4-fs (loop4): get root inode failed [ 25.032621][ T1036] EXT4-fs (loop4): mount failed [pid 1059] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1054] memfd_create("syzkaller", 0 [pid 1059] <... set_robust_list resumed>) = 0 [pid 1058] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1056] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1054] <... memfd_create resumed>) = 3 [pid 1056] <... prctl resumed>) = 0 [pid 1054] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1056] setpgid(0, 0 [pid 1054] <... mmap resumed>) = 0x7f6f98bca000 [pid 1059] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1056] <... setpgid resumed>) = 0 [pid 1057] <... set_robust_list resumed>) = 0 [pid 1057] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1056] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1056] write(3, "1000", 4) = 4 [pid 1057] <... prctl resumed>) = 0 [pid 1056] close(3 [pid 1057] setpgid(0, 0) = 0 [pid 1056] <... close resumed>) = 0 [pid 1057] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1056] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1057] <... openat resumed>) = 3 [pid 1056] <... futex resumed>) = 0 [pid 1056] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1057] write(3, "1000", 4 [pid 1056] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1057] <... write resumed>) = 4 [pid 1056] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1057] close(3 [pid 1056] <... mprotect resumed>) = 0 [pid 1057] <... close resumed>) = 0 [pid 1056] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1057] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1057] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1056] <... clone resumed>, parent_tid=[1060], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1060 [pid 1056] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1057] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1056] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1057] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1056] <... futex resumed>) = 0 [pid 1057] <... mprotect resumed>) = 0 [pid 1056] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1057] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1056] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1056] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1057] <... clone resumed>, parent_tid=[1061], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1061 [pid 1056] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1057] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1056] <... clone resumed>, parent_tid=[1062], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1062 [pid 1057] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1057] <... futex resumed>) = 0 [pid 1056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1057] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1057] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1057] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1054] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1057] <... clone resumed>, parent_tid=[1063], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1063 [pid 1057] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1057] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1060 attached [pid 1060] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1060] memfd_create("syzkaller", 0) = 3 [pid 1060] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1060] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1054] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1063 attached [pid 1063] set_robust_list(0x7f6fa0fea9e0, 24) = 0 ./strace-static-x86_64: Process 1061 attached [pid 1055] <... write resumed>) = 1048576 [pid 1054] munmap(0x7f6f98bca000, 1048576./strace-static-x86_64: Process 1062 attached [pid 1055] munmap(0x7f6f98bca000, 1048576 [pid 1063] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1055] <... munmap resumed>) = 0 [pid 1055] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1054] <... munmap resumed>) = 0 [pid 1061] set_robust_list(0x7f6fa100b9e0, 24 [pid 1062] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1061] <... set_robust_list resumed>) = 0 [pid 1055] <... openat resumed>) = 5 [pid 1054] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1062] <... set_robust_list resumed>) = 0 [pid 1061] memfd_create("syzkaller", 0 [pid 1055] ioctl(5, LOOP_SET_FD, 3 [pid 1054] <... openat resumed>) = 5 [pid 1061] <... memfd_create resumed>) = 4 [pid 1060] <... write resumed>) = 1048576 [pid 1060] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1060] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1062] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1054] ioctl(5, LOOP_SET_FD, 3 [pid 1061] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1055] <... ioctl resumed>) = 0 [pid 1061] <... mmap resumed>) = 0x7f6f98bca000 [pid 1061] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1061] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1061] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1055] close(3) = 0 [pid 1055] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1055] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 407] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1064 [pid 1054] <... ioctl resumed>) = 0 [pid 1054] close(3) = 0 ./strace-static-x86_64: Process 1064 attached [pid 1064] set_robust_list(0x5555564066e0, 24) = 0 [pid 1064] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1064] setpgid(0, 0) = 0 [pid 1064] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1064] write(3, "1000", 4) = 4 [pid 1064] close(3) = 0 [pid 1064] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1064] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1064] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1029] +++ exited with 0 +++ [pid 1064] <... mprotect resumed>) = 0 [pid 1064] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1065], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1065 [pid 1064] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1064] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1064] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1064] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1064] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1066], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1066 [pid 1064] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1064] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1065 attached [pid 1060] <... openat resumed>) = 4 [pid 1060] ioctl(4, LOOP_SET_FD, 3 [pid 1063] <... open resumed>) = 3 [pid 1062] <... open resumed>) = 5 [pid 1059] <... open resumed>) = 4 [pid 1058] <... open resumed>) = 4 [pid 1051] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1050] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1029, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 1059] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1058] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1051] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1059] <... futex resumed>) = 0 [pid 1058] <... futex resumed>) = 0 [pid 1051] <... futex resumed>) = 0 [pid 1050] <... futex resumed>) = 0 [pid 1059] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1058] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1051] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1050] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1059] <... mount resumed>) = 0 [pid 1063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1062] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1059] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1058] <... mount resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1059] <... futex resumed>) = 1 [pid 1058] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1051] <... futex resumed>) = 0 [pid 1063] <... futex resumed>) = 1 [pid 1062] <... futex resumed>) = 1 [pid 1057] <... futex resumed>) = 0 [pid 1063] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1062] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1057] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1056] <... futex resumed>) = 0 [pid 1051] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... openat resumed>) = 3 [pid 1059] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1058] <... futex resumed>) = 1 [pid 1056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] <... futex resumed>) = 0 [pid 1051] <... futex resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1058] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1063] <... mount resumed>) = 0 [pid 1062] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1059] <... open resumed>) = 3 [pid 1058] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1057] <... futex resumed>) = 0 [pid 1056] <... futex resumed>) = 0 [pid 1051] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1050] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1059] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1058] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1051] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1050] <... futex resumed>) = 0 [pid 411] close(3 [pid 1059] <... futex resumed>) = 0 [pid 1058] <... open resumed>) = 3 [pid 1051] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1058] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1059] openat(-1, "/proc/self/exe", O_RDONLY [pid 1058] <... futex resumed>) = 0 [pid 1051] <... futex resumed>) = 0 [pid 1050] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 411] <... close resumed>) = 0 [pid 1059] <... openat resumed>) = 6 [pid 1051] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1050] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1058] openat(-1, "/proc/self/exe", O_RDONLY [pid 1059] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1051] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1050] <... futex resumed>) = 0 [pid 1059] <... futex resumed>) = 0 [pid 1058] <... openat resumed>) = 6 [pid 1063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1062] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1059] sendfile(3, 6, NULL, 140737974943952 [pid 1058] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1057] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1051] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1063] <... futex resumed>) = 0 [pid 1062] <... mount resumed>) = 0 [pid 1057] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1051] <... futex resumed>) = 0 [pid 1050] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1058] <... futex resumed>) = 0 [pid 1063] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1062] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1061] <... openat resumed>) = 5 [pid 1058] sendfile(3, 6, NULL, 140737974943952 [pid 1057] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1054] mkdir("./bus", 0777 [pid 1051] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1050] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1068 [pid 1063] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1062] <... futex resumed>) = 1 [pid 1061] ioctl(5, LOOP_SET_FD, 4 [pid 1059] <... sendfile resumed>) = 1048576 [pid 1058] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1057] <... futex resumed>) = 0 [pid 1056] <... futex resumed>) = 0 [pid 1054] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1050] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1068 attached [pid 1063] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1062] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1059] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1058] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1057] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1054] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1062] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 25.100816][ T1055] loop2: detected capacity change from 0 to 2048 [ 25.104821][ T1054] loop1: detected capacity change from 0 to 2048 [ 25.123367][ T1060] loop3: detected capacity change from 0 to 2048 [pid 1062] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1059] <... futex resumed>) = 1 [pid 1058] <... futex resumed>) = 0 [pid 1056] <... futex resumed>) = 0 [pid 1051] <... futex resumed>) = 0 [pid 1050] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1068] set_robust_list(0x5555564066e0, 24 [pid 1065] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1065] memfd_create("syzkaller", 0) = 3 [pid 1065] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1065] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1060] <... ioctl resumed>) = 0 [pid 1060] close(3) = 0 [pid 1060] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1060] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1059] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1058] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1063] <... open resumed>) = 6 [pid 1062] <... open resumed>) = 6 [pid 1063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1062] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1063] <... futex resumed>) = 1 [pid 1062] <... futex resumed>) = 0 [pid 1057] <... futex resumed>) = 0 [pid 1063] openat(-1, "/proc/self/exe", O_RDONLY [pid 1062] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1057] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1066 attached [pid 1068] <... set_robust_list resumed>) = 0 [pid 1065] <... write resumed>) = 1048576 [pid 1064] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1063] <... openat resumed>) = 7 [pid 1061] <... ioctl resumed>) = 0 [pid 1057] <... futex resumed>) = 0 [pid 1056] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1054] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1068] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1066] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1054] ioctl(5, LOOP_CLR_FD [pid 1068] <... prctl resumed>) = 0 [pid 1066] <... set_robust_list resumed>) = 0 [pid 1056] <... futex resumed>) = 1 [pid 1054] <... ioctl resumed>) = 0 [pid 1068] setpgid(0, 0 [pid 1066] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1064] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1062] <... futex resumed>) = 0 [pid 1057] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1054] close(5 [pid 1068] <... setpgid resumed>) = 0 [pid 1066] <... open resumed>) = 4 [pid 1064] <... futex resumed>) = 0 [pid 1063] <... futex resumed>) = 0 [pid 1062] openat(-1, "/proc/self/exe", O_RDONLY [pid 1057] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1054] <... close resumed>) = 0 [pid 1068] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1066] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1064] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1061] close(4 [pid 1057] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1054] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1050] exit_group(0 [pid 1062] <... openat resumed>) = 3 [pid 1063] sendfile(6, 7, NULL, 140737974943952 [pid 1068] <... openat resumed>) = 3 [pid 1066] <... futex resumed>) = 0 [pid 1064] <... mmap resumed>) = 0x7f6f98ba9000 [pid 1062] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1061] <... close resumed>) = 0 [pid 1058] <... futex resumed>) = ? [pid 1057] <... futex resumed>) = 0 [pid 1054] <... futex resumed>) = ? [pid 1050] <... exit_group resumed>) = ? [pid 1068] write(3, "1000", 4 [pid 1066] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1064] mprotect(0x7f6f98baa000, 131072, PROT_READ|PROT_WRITE [pid 1062] <... futex resumed>) = 1 [pid 1061] mkdir("./bus", 0777 [pid 1058] +++ exited with 0 +++ [pid 1057] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1056] <... futex resumed>) = 0 [pid 1054] +++ exited with 0 +++ [pid 1050] +++ exited with 0 +++ [pid 1068] <... write resumed>) = 4 [pid 1061] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1068] close(3 [pid 1061] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1050, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1068] <... close resumed>) = 0 [pid 1064] <... mprotect resumed>) = 0 [pid 1062] sendfile(6, 3, NULL, 140737974943952 [pid 1056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1068] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1064] clone(child_stack=0x7f6f98bc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1056] <... futex resumed>) = 0 [pid 408] <... restart_syscall resumed>) = 0 [pid 1068] <... futex resumed>) = 0 [pid 1068] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1065] munmap(0x7f6f98bca000, 1048576 [pid 1068] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1065] <... munmap resumed>) = 0 [pid 1056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1068] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1065] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 408] <... openat resumed>) = 3 [pid 1068] <... mprotect resumed>) = 0 [pid 1065] <... openat resumed>) = 5 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1068] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1065] ioctl(5, LOOP_SET_FD, 3 [pid 1064] <... clone resumed>, parent_tid=[1070], tls=0x7f6f98bc9700, child_tidptr=0x7f6f98bc99d0) = 1070 [pid 408] <... ioctl resumed>) = 0 [pid 1064] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] close(3 [pid 1068] <... clone resumed>, parent_tid=[1071], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1071 [pid 1064] <... futex resumed>) = 0 [pid 408] <... close resumed>) = 0 [ 25.150476][ T1061] loop5: detected capacity change from 0 to 2048 [ 25.157480][ T1054] EXT4-fs (loop1): VFS: Can't find ext4 filesystem [ 25.168900][ T1055] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 25.192343][ T1065] loop0: detected capacity change from 0 to 2048 [pid 1068] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1068] <... futex resumed>) = 0 [pid 1064] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1072 attached ./strace-static-x86_64: Process 1071 attached ./strace-static-x86_64: Process 1070 attached [pid 1068] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1063] <... sendfile resumed>) = 1048576 [pid 1062] <... sendfile resumed>) = 1048576 [pid 1060] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1072 [pid 1072] set_robust_list(0x5555564066e0, 24 [pid 1071] set_robust_list(0x7f6fa100b9e0, 24 [pid 1070] set_robust_list(0x7f6f98bc99e0, 24 [pid 1068] <... futex resumed>) = 0 [pid 1060] ioctl(4, LOOP_CLR_FD [pid 1072] <... set_robust_list resumed>) = 0 [pid 1071] <... set_robust_list resumed>) = 0 [pid 1070] <... set_robust_list resumed>) = 0 [pid 1068] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1060] <... ioctl resumed>) = 0 [pid 1072] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1071] memfd_create("syzkaller", 0 [pid 1070] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1068] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1060] close(4 [pid 1072] <... prctl resumed>) = 0 [pid 1071] <... memfd_create resumed>) = 3 [pid 1070] <... mount resumed>) = 0 [pid 1068] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1060] <... close resumed>) = 0 [pid 1072] setpgid(0, 0 [pid 1071] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1070] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1068] <... mprotect resumed>) = 0 [pid 1060] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1072] <... setpgid resumed>) = 0 [pid 1071] <... mmap resumed>) = 0x7f6f98bca000 [pid 1070] <... futex resumed>) = 1 [pid 1068] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1064] <... futex resumed>) = 0 [pid 1060] <... futex resumed>) = 0 [pid 1072] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1071] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1070] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1064] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1062] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1060] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1055] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1072] <... openat resumed>) = 3 [pid 1071] <... write resumed>) = 1048576 [pid 1068] <... clone resumed>, parent_tid=[1074], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1074 [pid 1055] ioctl(5, LOOP_CLR_FD [pid 1066] <... futex resumed>) = 0 [pid 1064] <... futex resumed>) = 1 [pid 1063] <... futex resumed>) = 1 [pid 1062] <... futex resumed>) = 1 [pid 1057] <... futex resumed>) = 0 [pid 1056] <... futex resumed>) = 0 [pid 1072] write(3, "1000", 4 [pid 1068] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1066] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1064] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1056] exit_group(0 [pid 1055] <... ioctl resumed>) = 0 [pid 1063] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1062] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1072] <... write resumed>) = 4 [pid 1068] <... futex resumed>) = 0 [pid 1060] <... futex resumed>) = ? [pid 1056] <... exit_group resumed>) = ? [pid 1055] close(5 [pid 1062] +++ exited with 0 +++ [pid 1072] close(3 [pid 1068] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1060] +++ exited with 0 +++ [pid 1056] +++ exited with 0 +++ [pid 1072] <... close resumed>) = 0 [pid 1072] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1056, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1072] <... futex resumed>) = 0 [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 1072] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1072] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 410] <... restart_syscall resumed>) = 0 [pid 1072] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1075], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1075 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1072] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1071] munmap(0x7f6f98bca000, 1048576 [pid 410] <... openat resumed>) = 3 [pid 1072] <... futex resumed>) = 0 [pid 1071] <... munmap resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1072] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1071] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 410] <... ioctl resumed>) = 0 [pid 1072] <... futex resumed>) = 0 [pid 1071] <... openat resumed>) = 4 [pid 410] close(3 [pid 1072] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1071] ioctl(4, LOOP_SET_FD, 3 [pid 410] <... close resumed>) = 0 ./strace-static-x86_64: Process 1075 attached ./strace-static-x86_64: Process 1074 attached [pid 1072] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1066] <... open resumed>) = 6 [pid 1065] <... ioctl resumed>) = 0 [pid 1075] set_robust_list(0x7f6fa100b9e0, 24 [pid 1074] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1066] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1065] close(3 [pid 1075] <... set_robust_list resumed>) = 0 [pid 1074] <... set_robust_list resumed>) = 0 [pid 1066] <... futex resumed>) = 1 [pid 1065] <... close resumed>) = 0 [pid 1064] <... futex resumed>) = 0 [pid 1075] memfd_create("syzkaller", 0 [pid 1074] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1066] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1065] mkdir("./bus", 0777 [pid 1064] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1075] <... memfd_create resumed>) = 3 [pid 1074] <... open resumed>) = 5 [pid 1066] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1065] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1064] <... futex resumed>) = 0 [pid 1075] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1074] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1072] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1071] <... ioctl resumed>) = 0 [pid 1066] openat(-1, "/proc/self/exe", O_RDONLY [pid 1065] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1064] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1075] <... mmap resumed>) = 0x7f6f98bca000 [pid 1074] <... futex resumed>) = 1 [pid 1072] <... mprotect resumed>) = 0 [pid 1071] close(3 [pid 1068] <... futex resumed>) = 0 [pid 1066] <... openat resumed>) = 3 [pid 1061] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1055] <... close resumed>) = 0 [pid 1074] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1072] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1071] <... close resumed>) = 0 [pid 1068] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1066] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1061] ioctl(5, LOOP_CLR_FD [pid 1055] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1051] exit_group(0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1077 [pid 1071] mkdir("./bus", 0777 [pid 1068] <... futex resumed>) = 0 [pid 1066] <... futex resumed>) = 1 [pid 1064] <... futex resumed>) = 0 [pid 1059] <... futex resumed>) = ? [pid 1055] <... futex resumed>) = ? [pid 1051] <... exit_group resumed>) = ? [pid 1072] <... clone resumed>, parent_tid=[1078], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1078 [pid 1071] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1068] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1066] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1064] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1059] +++ exited with 0 +++ [pid 1055] +++ exited with 0 +++ [pid 1072] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1071] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1072] <... futex resumed>) = 0 [pid 1066] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1064] <... futex resumed>) = 0 [pid 1072] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1064] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1066] sendfile(6, 3, NULL, 140737974943952 [pid 1074] <... mount resumed>) = 0 [ 25.202924][ T1060] EXT4-fs (loop3): VFS: Can't find ext4 filesystem [ 25.226727][ T1071] loop4: detected capacity change from 0 to 2048 [ 25.237166][ T1061] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1074] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1077 attached [pid 1077] set_robust_list(0x5555564066e0, 24) = 0 [pid 1077] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1077] setpgid(0, 0) = 0 [pid 1077] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1077] write(3, "1000", 4) = 4 [pid 1077] close(3) = 0 [pid 1077] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1077] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1077] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1077] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1081], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1081 [pid 1077] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1077] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1077] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1077] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1077] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1082], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1082 [pid 1077] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1077] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1081 attached [pid 1081] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1081] memfd_create("syzkaller", 0) = 3 [pid 1081] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1081] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1081] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1081] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 1081] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1081] ioctl(4, LOOP_CLR_FD) = 0 [pid 1065] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1065] ioctl(5, LOOP_CLR_FD) = 0 [pid 1065] close(5) = 0 [pid 1065] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1065] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1078 attached [pid 1081] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1081] close(4) = 0 [pid 1081] close(3) = 0 [pid 1081] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1081] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1078] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1078] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1078] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1072] <... futex resumed>) = 0 [pid 1072] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1072] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1078] <... futex resumed>) = 1 [pid 1078] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1078] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1072] <... futex resumed>) = 0 [pid 1072] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1072] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1078] <... futex resumed>) = 1 [pid 1078] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1066] <... sendfile resumed>) = 1048576 [pid 1066] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1074] <... futex resumed>) = 1 [pid 1068] <... futex resumed>) = 0 [pid 1066] <... futex resumed>) = 1 [pid 1064] <... futex resumed>) = 0 [pid 1068] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1074] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1068] <... futex resumed>) = 0 [pid 1066] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1064] exit_group(0 [pid 1070] <... futex resumed>) = ? [pid 1068] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1064] <... exit_group resumed>) = ? [pid 1065] <... futex resumed>) = ? [pid 1066] <... futex resumed>) = ? [pid 1070] +++ exited with 0 +++ [pid 1065] +++ exited with 0 +++ [pid 1066] +++ exited with 0 +++ [pid 1064] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1064, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 407] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1083 ./strace-static-x86_64: Process 1082 attached [pid 1082] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1082] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1083 attached [pid 1075] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1083] set_robust_list(0x5555564066e0, 24) = 0 [pid 1083] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1083] setpgid(0, 0) = 0 [pid 1083] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1083] write(3, "1000", 4) = 4 [pid 1083] close(3) = 0 [pid 1083] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1083] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1083] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1083] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1071] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1071] ioctl(4, LOOP_CLR_FD) = 0 [pid 1071] close(4) = 0 [pid 1083] <... clone resumed>, parent_tid=[1084], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1084 [pid 1071] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1083] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1083] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1083] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1071] <... futex resumed>) = 0 [pid 1071] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1083] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1083] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1083] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1085], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1085 [pid 1083] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1083] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1084 attached [pid 1084] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1084] memfd_create("syzkaller", 0) = 3 [pid 1084] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1075] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1085 attached [pid 1075] munmap(0x7f6f98bca000, 1048576 [pid 1085] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1075] <... munmap resumed>) = 0 [pid 1075] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 6 [pid 1075] ioctl(6, LOOP_SET_FD, 3 [pid 1085] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1084] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1061] <... ioctl resumed>) = 0 [pid 1051] +++ exited with 0 +++ [pid 1061] close(5 [pid 1077] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1077] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 1077] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 1077] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 1077] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 1077] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1081] <... futex resumed>) = 0 [pid 1077] <... futex resumed>) = 1 [pid 1081] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1077] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1081] <... mount resumed>) = 0 [pid 1081] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1077] <... futex resumed>) = 0 [pid 1081] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1077] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1081] <... open resumed>) = 4 [pid 1077] <... futex resumed>) = 0 [pid 1081] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1077] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1081] <... futex resumed>) = 0 [pid 1077] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1081] openat(-1, "/proc/self/exe", O_RDONLY [pid 1077] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1081] <... openat resumed>) = 5 [pid 1077] <... futex resumed>) = 0 [pid 1061] <... close resumed>) = 0 [pid 1081] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1077] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1081] <... futex resumed>) = 0 [pid 1077] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1081] sendfile(4, 5, NULL, 140737974943952 [pid 1077] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1061] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1051, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1077] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1061] <... futex resumed>) = 0 [pid 1084] <... write resumed>) = 1048576 [pid 1078] <... open resumed>) = 5 [pid 1075] <... ioctl resumed>) = 0 [pid 1074] <... open resumed>) = 3 [pid 1061] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1078] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1074] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1057] exit_group(0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1078] <... futex resumed>) = 1 [pid 1074] <... futex resumed>) = 1 [pid 1068] <... futex resumed>) = 0 [pid 1063] <... futex resumed>) = ? [pid 1061] <... futex resumed>) = ? [pid 1057] <... exit_group resumed>) = ? [pid 409] <... openat resumed>) = 3 [pid 1082] <... open resumed>) = 3 [pid 1078] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1074] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1072] <... futex resumed>) = 0 [pid 1068] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1063] +++ exited with 0 +++ [pid 1061] +++ exited with 0 +++ [pid 1057] +++ exited with 0 +++ [pid 409] ioctl(3, LOOP_CLR_FD [pid 1082] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1072] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1071] <... futex resumed>) = 0 [pid 1068] <... futex resumed>) = 1 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1082] <... futex resumed>) = 0 [pid 1078] <... futex resumed>) = 0 [pid 1072] <... futex resumed>) = 1 [pid 1071] openat(-1, "/proc/self/exe", O_RDONLY [pid 1068] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] close(3 [pid 1082] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1078] openat(-1, "/proc/self/exe", O_RDONLY [pid 1072] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1071] <... openat resumed>) = 4 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1057, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 409] <... close resumed>) = 0 [pid 1078] <... openat resumed>) = 7 [ 25.267613][ T1065] EXT4-fs warning (device loop0): read_mmp_block:107: Error -117 while reading MMP block 64 [ 25.267795][ T1071] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 25.307509][ T1075] loop1: detected capacity change from 0 to 2048 [pid 1071] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1085] <... open resumed>) = 4 [pid 1084] munmap(0x7f6f98bca000, 1048576 [pid 1081] <... sendfile resumed>) = 1048576 [pid 1078] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1075] close(3 [pid 1071] <... futex resumed>) = 1 [pid 1068] <... futex resumed>) = 0 [pid 412] <... restart_syscall resumed>) = 0 [pid 1081] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1077] <... futex resumed>) = 0 [pid 1081] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1077] exit_group(0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1082] <... futex resumed>) = ? [pid 1081] <... futex resumed>) = ? [pid 1077] <... exit_group resumed>) = ? [pid 1068] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1071] sendfile(3, 4, NULL, 140737974943952 [pid 412] <... openat resumed>) = 3 [pid 1078] <... futex resumed>) = 1 [pid 1072] <... futex resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1086 [pid 1082] +++ exited with 0 +++ [pid 1081] +++ exited with 0 +++ [pid 1075] <... close resumed>) = 0 [pid 1072] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1068] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1075] mkdir("./bus", 0777 [pid 1072] <... futex resumed>) = 0 [pid 1068] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1078] sendfile(5, 7, NULL, 140737974943952 [pid 1085] <... futex resumed>) = 1 [pid 1083] <... futex resumed>) = 0 [pid 1075] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1072] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] close(3 [pid 1085] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1083] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1075] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 412] <... close resumed>) = 0 [pid 1085] <... mount resumed>) = 0 [pid 1083] <... futex resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1083] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1085] <... futex resumed>) = 0 [pid 1083] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1087 [pid 1085] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1083] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1085] <... open resumed>) = 5 [pid 1083] <... futex resumed>) = 0 [pid 1085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1084] <... munmap resumed>) = 0 [pid 1083] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1071] <... sendfile resumed>) = 1048576 [pid 1085] <... futex resumed>) = 0 [pid 1084] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1083] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1078] <... sendfile resumed>) = 1048576 [pid 1071] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1085] openat(-1, "/proc/self/exe", O_RDONLY [pid 1084] <... openat resumed>) = 6 [pid 1083] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1078] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1071] <... futex resumed>) = 1 [pid 1068] <... futex resumed>) = 0 [pid 1085] <... openat resumed>) = 7 [pid 1084] ioctl(6, LOOP_SET_FD, 3 [pid 1083] <... futex resumed>) = 0 [pid 1078] <... futex resumed>) = 1 [pid 1072] <... futex resumed>) = 0 [pid 1071] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1068] exit_group(0 [pid 1085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1084] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1083] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1078] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1074] <... futex resumed>) = ? [pid 1071] <... futex resumed>) = ? [pid 1068] <... exit_group resumed>) = ? [pid 1085] <... futex resumed>) = 0 [pid 1084] ioctl(6, LOOP_CLR_FD [pid 1083] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1074] +++ exited with 0 +++ [pid 1085] sendfile(5, 7, NULL, 140737974943952 [pid 1084] <... ioctl resumed>) = 0 [pid 1083] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1083] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1087 attached [pid 1071] +++ exited with 0 +++ [pid 1068] +++ exited with 0 +++ [pid 1087] set_robust_list(0x5555564066e0, 24 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1068, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1087] <... set_robust_list resumed>) = 0 [pid 1087] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 1087] <... prctl resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1084] ioctl(6, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1084] close(6) = 0 [pid 1084] close(3./strace-static-x86_64: Process 1088 attached ./strace-static-x86_64: Process 1086 attached [pid 1087] setpgid(0, 0 [pid 1075] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1088 [pid 1088] set_robust_list(0x5555564066e0, 24 [pid 1086] set_robust_list(0x5555564066e0, 24 [pid 1088] <... set_robust_list resumed>) = 0 [pid 1087] <... setpgid resumed>) = 0 [pid 1086] <... set_robust_list resumed>) = 0 [pid 1075] ioctl(6, LOOP_CLR_FD [pid 1088] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1084] <... close resumed>) = 0 [pid 1084] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1084] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1088] <... prctl resumed>) = 0 [pid 1087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1086] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1075] <... ioctl resumed>) = 0 [pid 1088] setpgid(0, 0 [pid 1087] <... openat resumed>) = 3 [pid 1086] <... prctl resumed>) = 0 [pid 1075] close(6 [pid 1088] <... setpgid resumed>) = 0 [pid 1087] write(3, "1000", 4 [pid 1086] setpgid(0, 0 [pid 1075] <... close resumed>) = 0 [pid 1088] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1087] <... write resumed>) = 4 [pid 1088] <... openat resumed>) = 3 [pid 1087] close(3 [pid 1086] <... setpgid resumed>) = 0 [pid 1075] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1072] exit_group(0 [pid 1088] write(3, "1000", 4 [pid 1086] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1072] <... exit_group resumed>) = ? [pid 1078] <... futex resumed>) = ? [pid 1087] <... close resumed>) = 0 [pid 1078] +++ exited with 0 +++ [pid 1087] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1087] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1087] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1088] <... write resumed>) = 4 [pid 1086] <... openat resumed>) = 3 [pid 1075] <... futex resumed>) = ? [pid 1088] close(3 [pid 1087] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1086] write(3, "1000", 4) = 4 [pid 1088] <... close resumed>) = 0 [pid 1087] <... clone resumed>, parent_tid=[1089], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1089 [pid 1086] close(3 [pid 1087] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1086] <... close resumed>) = 0 [pid 1086] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1087] <... futex resumed>) = 0 [pid 1087] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1088] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1087] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1086] <... futex resumed>) = 0 [pid 1088] <... futex resumed>) = 0 [pid 1087] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1088] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1087] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1086] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1088] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1087] <... mprotect resumed>) = 0 [pid 1085] <... sendfile resumed>) = 1048576 [pid 1086] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1088] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1087] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1090 attached [pid 1088] <... mprotect resumed>) = 0 [pid 1086] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1087] <... clone resumed>, parent_tid=[1090], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1090 [pid 1087] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1089 attached [pid 1088] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1086] <... mprotect resumed>) = 0 [pid 1090] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1087] <... futex resumed>) = 0 [pid 1085] <... futex resumed>) = 1 [pid 1083] <... futex resumed>) = 0 [pid 1087] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1083] exit_group(0 [pid 1084] <... futex resumed>) = ? [pid 1083] <... exit_group resumed>) = ? [pid 1086] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1091 attached [pid 1090] <... set_robust_list resumed>) = 0 [pid 1089] set_robust_list(0x7f6fa100b9e0, 24 [pid 1084] +++ exited with 0 +++ [pid 1086] <... clone resumed>, parent_tid=[1092], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1092 [pid 1086] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1086] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1086] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1086] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1088] <... clone resumed>, parent_tid=[1091], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1091 [pid 1086] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1093 attached ./strace-static-x86_64: Process 1092 attached , parent_tid=[1093], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1093 [pid 1090] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1089] <... set_robust_list resumed>) = 0 [pid 1088] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1091] set_robust_list(0x7f6fa100b9e0, 24 [pid 1086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1091] <... set_robust_list resumed>) = 0 [pid 1089] memfd_create("syzkaller", 0 [pid 1088] <... futex resumed>) = 0 [pid 1086] <... futex resumed>) = 0 [pid 1086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1091] memfd_create("syzkaller", 0 [pid 1088] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1089] <... memfd_create resumed>) = 4 [pid 1093] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1093] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1088] <... futex resumed>) = 0 [pid 1092] set_robust_list(0x7f6fa100b9e0, 24 [pid 1091] <... memfd_create resumed>) = 3 [pid 1089] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1088] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1092] <... set_robust_list resumed>) = 0 [pid 1091] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1089] <... mmap resumed>) = 0x7f6f98bca000 [pid 1088] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1088] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1091] <... mmap resumed>) = 0x7f6f98bca000 [pid 1092] memfd_create("syzkaller", 0) = 4 [pid 1092] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1092] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1089] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1088] <... mprotect resumed>) = 0 [pid 1092] <... write resumed>) = 1048576 [pid 1088] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1092] munmap(0x7f6f98bca000, 1048576 [pid 1088] <... clone resumed>, parent_tid=[1094], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1094 [pid 1088] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1092] <... munmap resumed>) = 0 [pid 1088] <... futex resumed>) = 0 [pid 1088] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1092] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1091] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1092] <... openat resumed>) = 5 [pid 1092] ioctl(5, LOOP_SET_FD, 4 [pid 1077] +++ exited with 0 +++ ./strace-static-x86_64: Process 1094 attached [pid 1091] <... write resumed>) = 1048576 [pid 1089] <... write resumed>) = 1048576 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1077, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1091] munmap(0x7f6f98bca000, 1048576 [pid 1089] munmap(0x7f6f98bca000, 1048576 [pid 1091] <... munmap resumed>) = 0 [pid 1089] <... munmap resumed>) = 0 [pid 1092] <... ioctl resumed>) = 0 [pid 1091] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1094] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1089] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 1089] ioctl(5, LOOP_SET_FD, 4 [pid 1094] <... set_robust_list resumed>) = 0 [pid 1092] close(4) = 0 [pid 1092] mkdir("./bus", 0777 [pid 1094] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1092] <... mkdir resumed>) = -1 EEXIST (File exists) [ 25.330606][ T1075] EXT4-fs (loop1): VFS: Can't find ext4 filesystem [ 25.368612][ T1092] loop2: detected capacity change from 0 to 2048 [pid 1092] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1089] <... ioctl resumed>) = 0 [pid 1089] close(4) = 0 [pid 1089] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1089] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1075] +++ exited with 0 +++ [pid 1072] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1072, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1094] <... open resumed>) = 5 [pid 1093] <... open resumed>) = 3 [pid 1091] <... openat resumed>) = 4 [pid 1090] <... open resumed>) = 3 [pid 1094] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1091] ioctl(4, LOOP_SET_FD, 3 [pid 1090] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1094] <... futex resumed>) = 1 [pid 1093] <... futex resumed>) = 1 [pid 1088] <... futex resumed>) = 0 [pid 1086] <... futex resumed>) = 0 [pid 1094] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1093] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1093] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1086] <... futex resumed>) = 0 [pid 1093] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1093] <... mount resumed>) = 0 [pid 1093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1086] <... futex resumed>) = 0 [pid 1093] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1093] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1086] <... futex resumed>) = 0 [pid 1093] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1093] <... open resumed>) = 4 [pid 1093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1086] <... futex resumed>) = 0 [pid 1093] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1093] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1086] <... futex resumed>) = 0 [pid 1093] openat(-1, "/proc/self/exe", O_RDONLY [pid 1091] <... ioctl resumed>) = 0 [pid 1090] <... futex resumed>) = 1 [pid 1088] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1087] <... futex resumed>) = 0 [pid 1086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1094] <... futex resumed>) = 0 [pid 1093] <... openat resumed>) = 6 [pid 1090] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1088] <... futex resumed>) = 1 [pid 1087] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... openat resumed>) = 3 [pid 1094] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1090] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1088] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1087] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1094] <... mount resumed>) = 0 [pid 1093] <... futex resumed>) = 1 [pid 1090] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1087] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1086] <... futex resumed>) = 0 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1094] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1093] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1090] <... mount resumed>) = 0 [pid 1086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] close(3 [pid 1094] <... futex resumed>) = 1 [pid 1093] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1091] close(3 [pid 1090] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1088] <... futex resumed>) = 0 [pid 1086] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 1094] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1093] sendfile(4, 6, NULL, 140737974943952 [pid 1091] <... close resumed>) = 0 [pid 1090] <... futex resumed>) = 1 [pid 1088] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1087] <... futex resumed>) = 0 [pid 1086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1094] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1094] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1090] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1088] <... futex resumed>) = 0 [pid 1087] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1094] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1090] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1088] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1087] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1098 [pid 1094] <... futex resumed>) = 0 [pid 1093] <... sendfile resumed>) = 1048576 [pid 1091] mkdir("./bus", 0777 [pid 1094] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1090] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1088] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1087] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1093] <... futex resumed>) = 1 [pid 1090] <... open resumed>) = 4 [pid 1088] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1086] <... futex resumed>) = 0 [ 25.375599][ T1089] loop5: detected capacity change from 0 to 2048 [ 25.388386][ T1091] loop4: detected capacity change from 0 to 2048 [ 25.409758][ T1095] EXT4-fs warning (device loop2): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 25.420697][ T1092] EXT4-fs (loop2): get root inode failed [pid 1093] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1098 attached [pid 1094] <... futex resumed>) = 0 [pid 1091] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1090] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1088] <... futex resumed>) = 1 [pid 1094] openat(-1, "/proc/self/exe", O_RDONLY [pid 1091] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1090] <... futex resumed>) = 1 [pid 1088] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1087] <... futex resumed>) = 0 [pid 1094] <... openat resumed>) = 6 [pid 1090] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1087] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1094] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1090] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1087] <... futex resumed>) = 0 [pid 1094] <... futex resumed>) = 1 [pid 1090] openat(-1, "/proc/self/exe", O_RDONLY [pid 1088] <... futex resumed>) = 0 [pid 1087] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1094] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1090] <... openat resumed>) = 6 [pid 1088] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1094] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1090] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1088] <... futex resumed>) = 0 [pid 1094] sendfile(3, 6, NULL, 140737974943952 [pid 1090] <... futex resumed>) = 1 [pid 1088] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1087] <... futex resumed>) = 0 [pid 1094] <... sendfile resumed>) = 1048576 [pid 1090] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1087] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1085] +++ exited with 0 +++ [pid 1083] +++ exited with 0 +++ [pid 1094] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1090] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1087] <... futex resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1083, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1094] <... futex resumed>) = 1 [pid 1090] sendfile(4, 6, NULL, 140737974943952 [pid 1088] <... futex resumed>) = 0 [pid 1087] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1098] set_robust_list(0x5555564066e0, 24 [pid 1094] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1090] <... sendfile resumed>) = 1048576 [pid 408] <... openat resumed>) = 3 [pid 1098] <... set_robust_list resumed>) = 0 [pid 1090] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1089] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1090] <... futex resumed>) = 1 [pid 1087] <... futex resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 1090] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 407] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] ioctl(3, LOOP_CLR_FD [pid 1098] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1100 [pid 1098] <... prctl resumed>) = 0 [pid 1089] ioctl(5, LOOP_CLR_FD [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1098] setpgid(0, 0 [pid 1089] <... ioctl resumed>) = 0 [pid 408] close(3) = 0 [pid 1098] <... setpgid resumed>) = 0 [pid 1089] close(5 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1098] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1089] <... close resumed>) = 0 [pid 1098] <... openat resumed>) = 3 [pid 1089] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1101 [pid 1098] write(3, "1000", 4 [pid 1089] <... futex resumed>) = 0 [pid 1087] exit_group(0 [pid 1090] <... futex resumed>) = ? [pid 1087] <... exit_group resumed>) = ? [pid 1098] <... write resumed>) = 4 [pid 1090] +++ exited with 0 +++ [pid 1092] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1098] close(3 [pid 1092] ioctl(5, LOOP_CLR_FD [pid 1089] +++ exited with 0 +++ [pid 1087] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1087, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1098] <... close resumed>) = 0 [pid 1092] <... ioctl resumed>) = 0 [pid 1092] close(5) = 0 [pid 1098] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1092] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1098] <... futex resumed>) = 0 [pid 1092] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 1092] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1098] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 412] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 1100 attached [pid 1098] <... mmap resumed>) = 0x7f6fa0feb000 [pid 412] <... ioctl resumed>) = 0 [pid 1100] set_robust_list(0x5555564066e0, 24 [pid 1098] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 412] close(3 [pid 1100] <... set_robust_list resumed>) = 0 [pid 1098] <... mprotect resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1098] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1086] exit_group(0 [pid 1098] <... clone resumed>, parent_tid=[1104], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1104 [pid 1093] <... futex resumed>) = ? [pid 1086] <... exit_group resumed>) = ? [pid 1092] <... futex resumed>) = ? [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1103 [pid 1093] +++ exited with 0 +++ [pid 1100] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1100] setpgid(0, 0) = 0 [pid 1100] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1100] write(3, "1000", 4) = 4 [pid 1098] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1104 attached ./strace-static-x86_64: Process 1103 attached ./strace-static-x86_64: Process 1101 attached [pid 1100] close(3 [pid 1098] <... futex resumed>) = 0 [pid 1104] set_robust_list(0x7f6fa100b9e0, 24 [pid 1103] set_robust_list(0x5555564066e0, 24 [pid 1101] set_robust_list(0x5555564066e0, 24 [pid 1100] <... close resumed>) = 0 [pid 1098] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1104] <... set_robust_list resumed>) = 0 [pid 1103] <... set_robust_list resumed>) = 0 [pid 1101] <... set_robust_list resumed>) = 0 [pid 1098] <... futex resumed>) = 0 [pid 1104] memfd_create("syzkaller", 0 [pid 1103] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1101] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1098] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1104] <... memfd_create resumed>) = 3 [pid 1103] <... prctl resumed>) = 0 [pid 1101] <... prctl resumed>) = 0 [pid 1098] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1104] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1103] setpgid(0, 0 [pid 1101] setpgid(0, 0 [pid 1098] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1104] <... mmap resumed>) = 0x7f6f98bca000 [pid 1103] <... setpgid resumed>) = 0 [pid 1101] <... setpgid resumed>) = 0 [pid 1098] <... mprotect resumed>) = 0 [pid 1104] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1103] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1101] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1098] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1103] <... openat resumed>) = 3 [pid 1101] <... openat resumed>) = 3 [pid 1100] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1104] <... write resumed>) = 1048576 [pid 1103] write(3, "1000", 4 [pid 1101] write(3, "1000", 4 [pid 1100] <... futex resumed>) = 0 [pid 1098] <... clone resumed>, parent_tid=[1107], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1107 [pid 1103] <... write resumed>) = 4 [pid 1101] <... write resumed>) = 4 [pid 1100] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1098] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1103] close(3 [pid 1101] close(3 [pid 1100] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1098] <... futex resumed>) = 0 [pid 1103] <... close resumed>) = 0 [pid 1101] <... close resumed>) = 0 [pid 1100] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1098] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1103] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1100] <... mprotect resumed>) = 0 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 [pid 1100] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1108 attached ./strace-static-x86_64: Process 1107 attached [pid 1104] munmap(0x7f6f98bca000, 1048576 [pid 1103] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1101] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1091] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1108] set_robust_list(0x7f6fa100b9e0, 24 [pid 1107] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1104] <... munmap resumed>) = 0 [pid 1103] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1101] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1100] <... clone resumed>, parent_tid=[1108], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1108 [pid 1091] ioctl(4, LOOP_CLR_FD [pid 1108] <... set_robust_list resumed>) = 0 [pid 1103] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1101] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1100] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1103] <... mprotect resumed>) = 0 [pid 1101] <... mprotect resumed>) = 0 [pid 1100] <... futex resumed>) = 0 [pid 1108] memfd_create("syzkaller", 0 [pid 1107] <... set_robust_list resumed>) = 0 [pid 1103] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1101] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1100] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1104] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1100] <... futex resumed>) = 0 [pid 1108] <... memfd_create resumed>) = 3 [pid 1107] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1108] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1103] <... clone resumed>, parent_tid=[1109], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1109 [pid 1101] <... clone resumed>, parent_tid=[1110], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1110 [pid 1100] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1108] <... mmap resumed>) = 0x7f6f98beb000 [pid 1107] <... open resumed>) = 4 [pid 1103] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1100] <... mmap resumed>) = 0x7f6f98bca000 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 [pid 1100] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1103] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1100] <... mprotect resumed>) = 0 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 [pid 1100] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1092] +++ exited with 0 +++ [pid 1086] +++ exited with 0 +++ [pid 1103] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1101] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1103] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1101] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1103] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1101] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1103] <... mprotect resumed>) = 0 [pid 1101] <... mprotect resumed>) = 0 [pid 1103] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1101] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1103] <... clone resumed>, parent_tid=[1112], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1112 [pid 1101] <... clone resumed>, parent_tid=[1113], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1113 [pid 1103] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 [pid 1103] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1110 attached [pid 1110] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1110] memfd_create("syzkaller", 0) = 3 [pid 1110] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1086, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1100] <... clone resumed>, parent_tid=[1111], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1111 [pid 1100] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1100] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 1110] <... mmap resumed>) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1113 attached [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1113] set_robust_list(0x7f6fa0fea9e0, 24./strace-static-x86_64: Process 1112 attached ) = 0 [pid 1113] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1112] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1113] <... open resumed>) = 4 [pid 1112] <... set_robust_list resumed>) = 0 [pid 1091] <... ioctl resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1114 [pid 1113] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1112] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1113] <... futex resumed>) = 1 [pid 1112] <... open resumed>) = 3 [pid 1101] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1109 attached [pid 1113] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1112] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1113] <... mount resumed>) = 0 [pid 1112] <... futex resumed>) = 1 [pid 1110] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1109] set_robust_list(0x7f6fa100b9e0, 24 [pid 1107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 [pid 1091] close(4 [pid 1113] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1112] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1109] <... set_robust_list resumed>) = 0 [pid 1103] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1113] <... futex resumed>) = 0 [pid 1112] <... mount resumed>) = 0 [pid 1109] memfd_create("syzkaller", 0 [pid 1107] <... futex resumed>) = 1 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1098] <... futex resumed>) = 0 [pid 1091] <... close resumed>) = 0 [pid 1113] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1112] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1109] <... memfd_create resumed>) = 4 [pid 1103] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1098] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1113] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1112] <... futex resumed>) = 0 [pid 1109] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1103] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1101] <... futex resumed>) = 0 [pid 1098] <... futex resumed>) = 0 [pid 1113] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1112] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1109] <... mmap resumed>) = 0x7f6f98bca000 [pid 1103] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1098] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1091] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1088] exit_group(0 [pid 1113] <... open resumed>) = 5 [pid 1112] <... open resumed>) = 5 [pid 1109] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1107] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1103] <... futex resumed>) = 0 [pid 1094] <... futex resumed>) = ? [pid 1088] <... exit_group resumed>) = ? [pid 1113] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1112] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1103] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1094] +++ exited with 0 +++ [pid 1091] <... futex resumed>) = ? [pid 1113] <... futex resumed>) = 1 [pid 1112] <... futex resumed>) = 0 [pid 1103] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1101] <... futex resumed>) = 0 [pid 1113] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1112] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1110] <... write resumed>) = 1048576 [pid 1108] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1107] <... mount resumed>) = 0 [pid 1104] <... openat resumed>) = 5 [pid 1103] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1091] +++ exited with 0 +++ [pid 1088] +++ exited with 0 +++ [pid 1113] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1112] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1109] <... write resumed>) = 1048576 [pid 1107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1104] ioctl(5, LOOP_SET_FD, 3 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1114 attached ./strace-static-x86_64: Process 1111 attached [pid 1113] openat(-1, "/proc/self/exe", O_RDONLY [pid 1112] openat(-1, "/proc/self/exe", O_RDONLY [pid 1107] <... futex resumed>) = 1 [pid 1103] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 25.426369][ T1089] EXT4-fs (loop5): get root inode failed [ 25.431810][ T1089] EXT4-fs (loop5): mount failed [ 25.436949][ T1092] EXT4-fs (loop2): mount failed [ 25.453473][ T1091] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1098] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1088, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1113] <... openat resumed>) = 6 [pid 1112] <... openat resumed>) = 6 [pid 1098] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1113] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1112] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1098] <... futex resumed>) = 0 [pid 1113] <... futex resumed>) = 1 [pid 1112] <... futex resumed>) = 1 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 [pid 1098] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1113] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1112] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1103] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1113] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1112] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 [pid 1113] sendfile(5, 6, NULL, 140737974943952 [pid 1112] sendfile(5, 6, NULL, 140737974943952 [pid 1103] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1114] set_robust_list(0x5555564066e0, 24 [pid 1113] <... sendfile resumed>) = 1048576 [pid 1112] <... sendfile resumed>) = 1048576 [pid 1111] set_robust_list(0x7f6f98bea9e0, 24 [pid 1108] <... write resumed>) = 1048576 [pid 1107] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1114] <... set_robust_list resumed>) = 0 [pid 1113] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1112] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1111] <... set_robust_list resumed>) = 0 [pid 1110] munmap(0x7f6f98bca000, 1048576 [pid 411] <... restart_syscall resumed>) = 0 [pid 1114] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1113] <... futex resumed>) = 1 [pid 1112] <... futex resumed>) = 1 [pid 1111] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1110] <... munmap resumed>) = 0 [pid 1108] munmap(0x7f6f98beb000, 1048576 [pid 1103] <... futex resumed>) = 0 [pid 1101] <... futex resumed>) = 0 [pid 1114] <... prctl resumed>) = 0 [pid 1113] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1112] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1110] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1100] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1114] setpgid(0, 0 [pid 1110] <... openat resumed>) = 7 [pid 1108] <... munmap resumed>) = 0 [pid 1100] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1114] <... setpgid resumed>) = 0 [pid 1110] ioctl(7, LOOP_SET_FD, 3 [pid 1108] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1100] <... futex resumed>) = 0 [pid 1114] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1111] <... open resumed>) = 4 [pid 1109] munmap(0x7f6f98bca000, 1048576 [pid 1108] <... openat resumed>) = 5 [pid 1107] <... open resumed>) = 6 [pid 1100] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 411] <... openat resumed>) = 3 [pid 1114] <... openat resumed>) = 3 [pid 1111] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1108] ioctl(5, LOOP_SET_FD, 3 [pid 1107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1100] <... mmap resumed>) = 0x7f6f98cca000 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1114] write(3, "1000", 4 [pid 1111] <... futex resumed>) = 0 [pid 1107] <... futex resumed>) = 1 [pid 1098] <... futex resumed>) = 0 [pid 1098] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1098] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1110] <... ioctl resumed>) = 0 [pid 1110] close(3) = 0 [pid 1110] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1110] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1104] <... ioctl resumed>) = 0 [pid 1104] close(3 [pid 1100] mprotect(0x7f6f98ccb000, 131072, PROT_READ|PROT_WRITE [pid 1111] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1107] openat(-1, "/proc/self/exe", O_RDONLY [pid 1100] <... mprotect resumed>) = 0 [pid 1114] <... write resumed>) = 4 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1114] close(3 [pid 1107] <... openat resumed>) = 7 [pid 1100] clone(child_stack=0x7f6f98cea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 411] close(3 [pid 1114] <... close resumed>) = 0 [pid 1107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1114] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1107] <... futex resumed>) = 1 [pid 1100] <... clone resumed>, parent_tid=[1115], tls=0x7f6f98cea700, child_tidptr=0x7f6f98cea9d0) = 1115 [pid 1098] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 1114] <... futex resumed>) = 0 [pid 1107] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1100] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1098] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1114] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1109] <... munmap resumed>) = 0 [pid 1107] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1100] <... futex resumed>) = 0 [pid 1098] <... futex resumed>) = 0 [pid 1107] sendfile(6, 7, NULL, 140737974943952 [pid 1100] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1098] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1114] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1109] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1114] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1116 [pid 1114] <... mprotect resumed>) = 0 [pid 1114] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1117], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1117 [pid 1114] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1114] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1114] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1114] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1114] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1118], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1118 [pid 1114] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1114] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1104] <... close resumed>) = 0 [pid 1104] mkdir("./bus", 0777 [pid 1109] <... openat resumed>) = 7 [pid 1107] <... sendfile resumed>) = 1048576 [pid 1107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1104] <... mkdir resumed>) = -1 EEXIST (File exists) [ 25.510630][ T1104] loop3: detected capacity change from 0 to 2048 [ 25.538042][ T1110] loop1: detected capacity change from 0 to 2048 [ 25.545524][ T1108] loop0: detected capacity change from 0 to 2048 [pid 1104] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1109] ioctl(7, LOOP_SET_FD, 4 [pid 1107] <... futex resumed>) = 1 [pid 1098] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1118 attached ./strace-static-x86_64: Process 1117 attached ./strace-static-x86_64: Process 1116 attached ./strace-static-x86_64: Process 1115 attached [pid 1109] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1108] <... ioctl resumed>) = 0 [pid 1107] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1118] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1117] set_robust_list(0x7f6fa100b9e0, 24 [pid 1116] set_robust_list(0x5555564066e0, 24 [pid 1115] set_robust_list(0x7f6f98cea9e0, 24 [pid 1109] ioctl(7, LOOP_CLR_FD [pid 1108] close(3 [pid 1118] <... set_robust_list resumed>) = 0 [pid 1117] <... set_robust_list resumed>) = 0 [pid 1116] <... set_robust_list resumed>) = 0 [pid 1115] <... set_robust_list resumed>) = 0 [pid 1109] <... ioctl resumed>) = 0 [pid 1108] <... close resumed>) = 0 [pid 1118] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1117] memfd_create("syzkaller", 0 [pid 1116] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1115] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1108] mkdir("./bus", 0777 [pid 1118] <... open resumed>) = 4 [pid 1117] <... memfd_create resumed>) = 3 [pid 1116] <... prctl resumed>) = 0 [pid 1115] <... mount resumed>) = 0 [pid 1108] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1115] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1116] setpgid(0, 0 [pid 1117] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1108] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1118] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1117] <... mmap resumed>) = 0x7f6f98bca000 [pid 1116] <... setpgid resumed>) = 0 [pid 1115] <... futex resumed>) = 1 [pid 1109] ioctl(7, LOOP_SET_FD, 4 [pid 1100] <... futex resumed>) = 0 [pid 1116] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1115] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1109] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1117] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1109] close(7 [pid 1100] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1116] <... openat resumed>) = 3 [pid 1118] <... futex resumed>) = 1 [pid 1116] write(3, "1000", 4 [pid 1114] <... futex resumed>) = 0 [pid 1111] <... futex resumed>) = 0 [pid 1109] <... close resumed>) = 0 [pid 1100] <... futex resumed>) = 1 [pid 1118] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1116] <... write resumed>) = 4 [pid 1114] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1111] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1109] close(4 [pid 1100] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1116] close(3 [pid 1114] <... futex resumed>) = 0 [pid 1111] <... open resumed>) = 3 [pid 1114] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1109] <... close resumed>) = 0 [pid 1111] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1116] <... close resumed>) = 0 [pid 1118] <... mount resumed>) = 0 [pid 1116] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1111] <... futex resumed>) = 1 [pid 1118] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1109] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1100] <... futex resumed>) = 0 [pid 1118] <... futex resumed>) = 1 [pid 1116] <... futex resumed>) = 0 [pid 1114] <... futex resumed>) = 0 [pid 1111] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1109] <... futex resumed>) = 0 [pid 1100] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1118] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1117] <... write resumed>) = 1048576 [pid 1116] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1114] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1111] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1109] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1100] <... futex resumed>) = 0 [pid 1118] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1117] munmap(0x7f6f98bca000, 1048576 [pid 1116] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1114] <... futex resumed>) = 0 [pid 1111] openat(-1, "/proc/self/exe", O_RDONLY [pid 1103] exit_group(0 [pid 1100] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1118] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1117] <... munmap resumed>) = 0 [pid 1116] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1114] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1112] <... futex resumed>) = ? [pid 1111] <... openat resumed>) = 6 [pid 1109] <... futex resumed>) = ? [pid 1104] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1103] <... exit_group resumed>) = ? [pid 1118] <... open resumed>) = 5 [pid 1117] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1116] <... mprotect resumed>) = 0 [pid 1112] +++ exited with 0 +++ [pid 1111] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1109] +++ exited with 0 +++ [pid 1104] ioctl(5, LOOP_CLR_FD [pid 1118] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1117] <... openat resumed>) = 6 [pid 1116] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1111] <... futex resumed>) = 1 [pid 1103] +++ exited with 0 +++ [pid 1100] <... futex resumed>) = 0 [pid 1118] <... futex resumed>) = 1 [pid 1117] ioctl(6, LOOP_SET_FD, 3 [pid 1114] <... futex resumed>) = 0 [pid 1111] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1100] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1118] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1116] <... clone resumed>, parent_tid=[1123], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1123 [pid 1114] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1111] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1100] <... futex resumed>) = 0 [pid 1118] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1116] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1114] <... futex resumed>) = 0 [pid 1111] sendfile(3, 6, NULL, 140737974943952 [pid 1104] <... ioctl resumed>) = 0 [ 25.561692][ T1104] EXT4-fs (loop3): VFS: Can't find ext4 filesystem [ 25.590072][ T1110] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1100] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1103, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- ./strace-static-x86_64: Process 1123 attached [pid 1118] openat(-1, "/proc/self/exe", O_RDONLY [pid 1116] <... futex resumed>) = 0 [pid 1114] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1110] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1104] close(5 [pid 1123] set_robust_list(0x7f6fa100b9e0, 24 [pid 1110] ioctl(7, LOOP_CLR_FD [pid 1104] <... close resumed>) = 0 [pid 1123] <... set_robust_list resumed>) = 0 [pid 1104] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1123] memfd_create("syzkaller", 0 [pid 1104] <... futex resumed>) = 0 [pid 1123] <... memfd_create resumed>) = 3 [pid 1104] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1123] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1123] <... mmap resumed>) = 0x7f6f98beb000 [pid 412] <... openat resumed>) = 3 [pid 1123] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1118] <... openat resumed>) = 7 [pid 1116] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1111] <... sendfile resumed>) = 1048576 [pid 1098] exit_group(0 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1124 [pid 1118] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1116] <... futex resumed>) = 0 [pid 1107] <... futex resumed>) = ? [pid 1104] <... futex resumed>) = ? [pid 1098] <... exit_group resumed>) = ? [pid 1111] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1124 attached [pid 1124] set_robust_list(0x5555564066e0, 24) = 0 [pid 1124] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1124] setpgid(0, 0) = 0 [pid 1124] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1124] write(3, "1000", 4) = 4 [pid 1124] close(3) = 0 [pid 1124] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1124] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1117] <... ioctl resumed>) = 0 [pid 1116] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1107] +++ exited with 0 +++ [pid 1104] +++ exited with 0 +++ [pid 1116] <... mmap resumed>) = 0x7f6f98bca000 [pid 1124] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1124] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1116] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1098] +++ exited with 0 +++ [pid 1118] <... futex resumed>) = 1 [pid 1114] <... futex resumed>) = 0 [pid 1116] <... mprotect resumed>) = 0 [pid 1114] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1118] sendfile(5, 7, NULL, 140737974943952 [pid 1116] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1114] <... futex resumed>) = 0 [pid 1111] <... futex resumed>) = 1 [pid 1100] <... futex resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1098, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1114] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1116] <... clone resumed>, parent_tid=[1125], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1125 [pid 1116] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1116] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] <... openat resumed>) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = 0 [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1118] <... sendfile resumed>) = 1048576 [pid 1111] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1118] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1126 [pid 1118] <... futex resumed>) = 1 [pid 1114] <... futex resumed>) = 0 [pid 1117] close(3 [pid 1118] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1117] <... close resumed>) = 0 [pid 1117] mkdir("./bus", 0777 [pid 1108] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1117] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1108] ioctl(5, LOOP_CLR_FD) = 0 [pid 1117] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1108] close(5) = 0 [pid 1108] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1108] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1124] <... mprotect resumed>) = 0 [pid 1124] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1127], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1127 [pid 1124] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1124] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1124] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1124] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1100] exit_group(0 [pid 1115] <... futex resumed>) = ? [pid 1111] <... futex resumed>) = ? [pid 1100] <... exit_group resumed>) = ? [pid 1115] +++ exited with 0 +++ [pid 1111] +++ exited with 0 +++ [pid 1124] <... mprotect resumed>) = 0 [pid 1124] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1108] <... futex resumed>) = ? [pid 1124] <... clone resumed>, parent_tid=[1128], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1128 [pid 1124] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1124] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1126 attached [pid 1126] set_robust_list(0x5555564066e0, 24) = 0 [pid 1110] <... ioctl resumed>) = 0 [pid 1126] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1110] close(7) = 0 [pid 1126] <... prctl resumed>) = 0 [pid 1110] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1101] exit_group(0 [pid 1113] <... futex resumed>) = ? [pid 1101] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1128 attached ./strace-static-x86_64: Process 1127 attached ./strace-static-x86_64: Process 1125 attached [pid 1126] setpgid(0, 0 [pid 1123] <... write resumed>) = 1048576 [pid 1117] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1113] +++ exited with 0 +++ [pid 1110] +++ exited with 0 +++ [pid 1128] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1125] set_robust_list(0x7f6f98bea9e0, 24 [pid 1123] munmap(0x7f6f98beb000, 1048576 [pid 1117] ioctl(6, LOOP_CLR_FD [pid 1128] <... set_robust_list resumed>) = 0 [pid 1125] <... set_robust_list resumed>) = 0 [pid 1123] <... munmap resumed>) = 0 [pid 1128] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1125] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1123] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1117] <... ioctl resumed>) = 0 [pid 1128] <... open resumed>) = 3 [pid 1125] <... open resumed>) = 4 [pid 1123] <... openat resumed>) = 5 [pid 1117] close(6 [pid 1128] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1125] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1123] ioctl(5, LOOP_SET_FD, 3 [pid 1117] <... close resumed>) = 0 [pid 1128] <... futex resumed>) = 1 [pid 1127] set_robust_list(0x7f6fa100b9e0, 24 [pid 1126] <... setpgid resumed>) = 0 [pid 1125] <... futex resumed>) = 1 [pid 1124] <... futex resumed>) = 0 [pid 1116] <... futex resumed>) = 0 [pid 1126] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1124] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1126] <... openat resumed>) = 3 [pid 1124] <... futex resumed>) = 0 [pid 1126] write(3, "1000", 4 [pid 1124] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1126] <... write resumed>) = 4 [pid 1126] close(3) = 0 [pid 1126] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 25.623310][ T1108] EXT4-fs (loop0): get root inode failed [ 25.632168][ T1108] EXT4-fs (loop0): mount failed [ 25.637315][ T1117] loop2: detected capacity change from 0 to 2048 [ 25.652901][ T1117] EXT4-fs (loop2): VFS: Can't find ext4 filesystem [pid 1126] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1128] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1125] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1123] <... ioctl resumed>) = 0 [pid 1117] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1127] <... set_robust_list resumed>) = 0 [pid 1116] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1128] <... mount resumed>) = 0 [pid 1126] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1125] <... mount resumed>) = 0 [pid 1128] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1126] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1125] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1117] <... futex resumed>) = 0 [pid 1116] <... futex resumed>) = 0 [pid 1128] <... futex resumed>) = 1 [pid 1126] <... mprotect resumed>) = 0 [pid 1125] <... futex resumed>) = 0 [pid 1124] <... futex resumed>) = 0 [pid 1117] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1116] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1123] close(3 [pid 1128] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1127] memfd_create("syzkaller", 0 [pid 1126] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1125] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1124] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1123] <... close resumed>) = 0 [pid 1116] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1128] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1124] <... futex resumed>) = 0 [pid 1123] mkdir("./bus", 0777 [pid 1116] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1114] exit_group(0 [pid 1128] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1126] <... clone resumed>, parent_tid=[1129], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1129 [pid 1124] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1116] <... futex resumed>) = 1 [pid 1125] <... futex resumed>) = 0 [pid 1126] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1128] <... open resumed>) = 4 [pid 1118] <... futex resumed>) = ? [pid 1117] <... futex resumed>) = ? [pid 1114] <... exit_group resumed>) = ? [pid 1128] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1125] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1123] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1118] +++ exited with 0 +++ [pid 1116] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1126] <... futex resumed>) = 0 [pid 1126] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1125] <... open resumed>) = 3 [pid 1128] <... futex resumed>) = 1 [pid 1124] <... futex resumed>) = 0 [pid 1128] openat(-1, "/proc/self/exe", O_RDONLY [pid 1126] <... futex resumed>) = 0 [pid 1125] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1124] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1128] <... openat resumed>) = 5 [pid 1126] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1124] <... futex resumed>) = 0 [pid 1125] <... futex resumed>) = 1 [pid 1116] <... futex resumed>) = 0 [pid 1128] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1126] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1125] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1124] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1116] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1128] <... futex resumed>) = 0 [pid 1126] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1125] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1124] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1116] <... futex resumed>) = 0 [pid 1128] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1126] <... mprotect resumed>) = 0 [pid 1125] openat(-1, "/proc/self/exe", O_RDONLY [pid 1124] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1117] +++ exited with 0 +++ [pid 1116] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1114] +++ exited with 0 +++ [pid 1128] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1126] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1125] <... openat resumed>) = 6 [pid 1124] <... futex resumed>) = 0 [pid 1123] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1128] sendfile(4, 5, NULL, 140737974943952 [pid 1127] <... memfd_create resumed>) = 6 [pid 1125] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1124] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1114, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1126] <... clone resumed>, parent_tid=[1130], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1130 [pid 1126] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1126] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 1125] <... futex resumed>) = 1 [pid 1125] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1116] <... futex resumed>) = 0 [pid 409] <... restart_syscall resumed>) = 0 [pid 1116] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 1 ./strace-static-x86_64: Process 1129 attached [pid 1129] set_robust_list(0x7f6fa100b9e0, 24 [pid 1116] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1125] <... futex resumed>) = 0 [pid 1129] <... set_robust_list resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 1125] sendfile(3, 6, NULL, 140737974943952 [pid 1129] memfd_create("syzkaller", 0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 1129] <... memfd_create resumed>) = 3 [pid 409] <... ioctl resumed>) = 0 [pid 1129] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 409] close(3 [pid 1129] <... mmap resumed>) = 0x7f6f98bca000 [pid 409] <... close resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1131 ./strace-static-x86_64: Process 1130 attached [pid 1130] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1130] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1130] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1126] <... futex resumed>) = 0 [pid 1126] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1126] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1130] <... futex resumed>) = 1 [pid 1130] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1130] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1126] <... futex resumed>) = 0 [pid 1126] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1126] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1130] <... futex resumed>) = 1 [pid 1130] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1125] <... sendfile resumed>) = 1048576 [pid 1125] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1116] <... futex resumed>) = 0 [pid 1125] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1129] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1128] <... sendfile resumed>) = 1048576 [pid 1128] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1124] <... futex resumed>) = 0 [pid 1128] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1129] <... write resumed>) = 1048576 [pid 1129] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1129] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1127] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1131 attached [pid 1131] set_robust_list(0x5555564066e0, 24 [pid 1123] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1131] <... set_robust_list resumed>) = 0 [pid 1130] <... open resumed>) = 5 [pid 1123] ioctl(5, LOOP_CLR_FD [pid 1101] +++ exited with 0 +++ [pid 1130] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1126] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1101, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1130] openat(-1, "/proc/self/exe", O_RDONLY [pid 1126] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1130] <... openat resumed>) = 7 [pid 1126] <... futex resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 1130] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1126] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] ioctl(3, LOOP_CLR_FD [pid 1130] <... futex resumed>) = 0 [pid 1126] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1130] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1126] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1130] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1126] <... futex resumed>) = 0 [pid 408] close(3 [pid 1130] sendfile(5, 7, NULL, 140737974943952 [pid 1126] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] <... close resumed>) = 0 [pid 1130] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1130] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1126] <... futex resumed>) = 0 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1132 [pid 1130] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1129] <... openat resumed>) = 6 [pid 1129] ioctl(6, LOOP_SET_FD, 3./strace-static-x86_64: Process 1132 attached [pid 1131] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1123] <... ioctl resumed>) = 0 [pid 1132] set_robust_list(0x5555564066e0, 24 [pid 1131] <... prctl resumed>) = 0 [pid 1123] close(5 [pid 1132] <... set_robust_list resumed>) = 0 [pid 1131] setpgid(0, 0 [pid 1123] <... close resumed>) = 0 [pid 1131] <... setpgid resumed>) = 0 [pid 1123] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1132] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1131] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1123] <... futex resumed>) = 0 [pid 1132] <... prctl resumed>) = 0 [pid 1132] setpgid(0, 0 [pid 1131] <... openat resumed>) = 3 [pid 1123] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1132] <... setpgid resumed>) = 0 [pid 1131] write(3, "1000", 4 [pid 1132] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1131] <... write resumed>) = 4 [pid 1131] close(3) = 0 [pid 1116] exit_group(0 [pid 1132] <... openat resumed>) = 3 [pid 1131] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1116] <... exit_group resumed>) = ? [pid 1125] <... futex resumed>) = -1 (errno 18446744073709551414) [pid 1131] <... futex resumed>) = 0 [pid 1123] <... futex resumed>) = ? [pid 1125] +++ exited with 0 +++ [pid 1131] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1131] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1131] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1133], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1133 [pid 1132] write(3, "1000", 4 [pid 1131] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1123] +++ exited with 0 +++ [pid 1116] +++ exited with 0 +++ [pid 1131] <... futex resumed>) = 0 [pid 1132] <... write resumed>) = 4 [pid 1131] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1132] close(3 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1116, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1131] <... futex resumed>) = 0 [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1131] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1132] <... close resumed>) = 0 [pid 1131] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1132] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1131] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 411] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 1133 attached [pid 1132] <... futex resumed>) = 0 [pid 1131] <... mprotect resumed>) = 0 [pid 1129] <... ioctl resumed>) = 0 [pid 1127] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1132] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1133] set_robust_list(0x7f6fa100b9e0, 24 [pid 1131] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1129] close(3 [pid 1127] <... write resumed>) = 1048576 [pid 1132] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1129] <... close resumed>) = 0 [pid 1127] munmap(0x7f6f98bca000, 1048576 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1132] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1131] <... clone resumed>, parent_tid=[1134], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1134 [pid 1129] mkdir("./bus", 0777 [pid 1127] <... munmap resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 1132] <... mprotect resumed>) = 0 [pid 1131] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1129] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1127] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 411] ioctl(3, LOOP_CLR_FD [pid 1132] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1131] <... futex resumed>) = 0 [pid 1129] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1127] <... openat resumed>) = 7 [pid 411] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1135 attached ./strace-static-x86_64: Process 1134 attached [pid 1133] <... set_robust_list resumed>) = 0 [pid 1131] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1127] ioctl(7, LOOP_SET_FD, 6 [pid 411] close(3 [pid 1135] set_robust_list(0x7f6fa100b9e0, 24 [pid 1134] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1133] memfd_create("syzkaller", 0 [pid 1132] <... clone resumed>, parent_tid=[1135], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1135 [pid 1127] <... ioctl resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 1132] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1135] <... set_robust_list resumed>) = 0 [pid 1134] <... set_robust_list resumed>) = 0 [pid 1133] <... memfd_create resumed>) = 3 [pid 1132] <... futex resumed>) = 0 [pid 1127] close(6./strace-static-x86_64: Process 1136 attached [pid 1135] memfd_create("syzkaller", 0 [pid 1133] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1132] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1136] set_robust_list(0x5555564066e0, 24 [pid 1133] <... mmap resumed>) = 0x7f6f98bca000 [pid 1132] <... futex resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1136 [pid 1136] <... set_robust_list resumed>) = 0 [pid 1132] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1136] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1132] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1136] <... prctl resumed>) = 0 [pid 1132] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1136] setpgid(0, 0 [pid 1132] <... mprotect resumed>) = 0 [pid 1136] <... setpgid resumed>) = 0 [pid 1132] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1136] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1132] <... clone resumed>, parent_tid=[1137], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1137 ./strace-static-x86_64: Process 1137 attached [pid 1135] <... memfd_create resumed>) = 3 [pid 1134] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1133] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1127] <... close resumed>) = 0 [pid 1137] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1135] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1134] <... open resumed>) = 4 [pid 1133] <... write resumed>) = 1048576 [pid 1127] mkdir("./bus", 0777 [pid 1137] <... set_robust_list resumed>) = 0 [pid 1135] <... mmap resumed>) = 0x7f6f98bca000 [pid 1134] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1133] munmap(0x7f6f98bca000, 1048576 [pid 1132] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1127] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1137] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1136] write(3, "1000", 4 [pid 1135] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1134] <... futex resumed>) = 1 [pid 1133] <... munmap resumed>) = 0 [pid 1132] <... futex resumed>) = 0 [pid 1131] <... futex resumed>) = 0 [pid 1127] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1108] +++ exited with 0 +++ [pid 1100] +++ exited with 0 +++ [pid 1137] <... open resumed>) = 4 [pid 1136] <... write resumed>) = 4 [pid 1135] <... write resumed>) = 1048576 [pid 1134] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1133] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1132] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1131] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1137] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1134] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1133] <... openat resumed>) = 5 [pid 1137] <... futex resumed>) = 0 [pid 1136] close(3 [pid 1134] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1133] ioctl(5, LOOP_SET_FD, 3 [pid 1132] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1131] <... futex resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1100, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [ 25.667900][ T1123] loop4: detected capacity change from 0 to 2048 [ 25.689167][ T1123] EXT4-fs (loop4): VFS: Can't find ext4 filesystem [ 25.701846][ T1129] loop3: detected capacity change from 0 to 2048 [ 25.716791][ T1127] loop5: detected capacity change from 0 to 2048 [pid 1137] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1136] <... close resumed>) = 0 [pid 1135] munmap(0x7f6f98bca000, 1048576 [pid 1134] <... mount resumed>) = 0 [pid 1133] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1132] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1131] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1137] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1136] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1135] <... munmap resumed>) = 0 [pid 1134] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1133] ioctl(5, LOOP_CLR_FD [pid 1132] <... futex resumed>) = 0 [pid 1131] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1137] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1135] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1134] <... futex resumed>) = 0 [pid 1133] <... ioctl resumed>) = 0 [pid 1137] <... mount resumed>) = 0 [pid 1135] <... openat resumed>) = 5 [pid 1134] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1137] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1135] ioctl(5, LOOP_SET_FD, 3 [pid 1137] <... futex resumed>) = 0 [pid 1137] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1136] <... futex resumed>) = 0 [pid 1132] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1131] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1136] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1134] <... futex resumed>) = 0 [pid 1133] ioctl(5, LOOP_SET_FD, 3 [pid 1132] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1131] <... futex resumed>) = 1 [pid 1129] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1136] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1134] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1133] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1129] ioctl(6, LOOP_CLR_FD [pid 1133] close(5 [pid 1129] <... ioctl resumed>) = 0 [pid 1133] <... close resumed>) = 0 [pid 1129] close(6 [pid 1133] close(3 [pid 1129] <... close resumed>) = 0 [pid 1136] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1133] <... close resumed>) = 0 [pid 1132] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1131] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1129] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1133] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1129] <... futex resumed>) = 0 [pid 1137] <... futex resumed>) = 0 [pid 1136] <... mprotect resumed>) = 0 [pid 1133] <... futex resumed>) = 0 [pid 1132] <... futex resumed>) = 1 [pid 1129] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 407] <... openat resumed>) = 3 [pid 1137] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1136] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1133] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1132] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1126] exit_group(0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1130] <... futex resumed>) = ? [pid 1129] <... futex resumed>) = ? [pid 1126] <... exit_group resumed>) = ? [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1136] <... clone resumed>, parent_tid=[1142], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1142 [pid 1130] +++ exited with 0 +++ [pid 1129] +++ exited with 0 +++ [pid 1126] +++ exited with 0 +++ [pid 407] close(3 [pid 1136] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1126, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 407] <... close resumed>) = 0 [pid 1136] <... futex resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1136] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1136] <... futex resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 1136] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1143 [pid 1136] <... mmap resumed>) = 0x7f6fa0fca000 [pid 410] <... ioctl resumed>) = 0 [pid 1136] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 410] close(3) = 0 [pid 1136] <... mprotect resumed>) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1136] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1144 [pid 1136] <... clone resumed>, parent_tid=[1145], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1145 [pid 1136] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1136] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1142 attached [pid 1142] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1142] memfd_create("syzkaller", 0) = 3 [pid 1142] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0./strace-static-x86_64: Process 1143 attached ) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1144 attached [pid 1143] set_robust_list(0x5555564066e0, 24 [pid 1142] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1145 attached [pid 1144] set_robust_list(0x5555564066e0, 24 [pid 1143] <... set_robust_list resumed>) = 0 [pid 1145] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1144] <... set_robust_list resumed>) = 0 [pid 1143] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1145] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1144] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1143] <... prctl resumed>) = 0 [pid 1127] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1144] <... prctl resumed>) = 0 [pid 1143] setpgid(0, 0 [pid 1144] setpgid(0, 0 [pid 1143] <... setpgid resumed>) = 0 [pid 1144] <... setpgid resumed>) = 0 [pid 1143] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1144] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1143] <... openat resumed>) = 3 [pid 1144] write(3, "1000", 4 [pid 1143] write(3, "1000", 4 [pid 1144] <... write resumed>) = 4 [pid 1143] <... write resumed>) = 4 [pid 1144] close(3 [pid 1143] close(3 [pid 1144] <... close resumed>) = 0 [pid 1143] <... close resumed>) = 0 [pid 1127] ioctl(7, LOOP_CLR_FD [pid 1144] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1143] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1144] <... futex resumed>) = 0 [pid 1143] <... futex resumed>) = 0 [pid 1144] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1143] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1144] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1143] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1144] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1143] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1144] <... mprotect resumed>) = 0 [pid 1143] <... mprotect resumed>) = 0 [pid 1144] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1143] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1147 attached ./strace-static-x86_64: Process 1146 attached [pid 1142] <... write resumed>) = 1048576 [pid 1147] set_robust_list(0x7f6fa100b9e0, 24 [pid 1146] set_robust_list(0x7f6fa100b9e0, 24 [pid 1144] <... clone resumed>, parent_tid=[1147], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1147 [pid 1143] <... clone resumed>, parent_tid=[1146], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1146 [pid 1142] munmap(0x7f6f98bca000, 1048576 [pid 1135] <... ioctl resumed>) = 0 [pid 1147] <... set_robust_list resumed>) = 0 [pid 1146] <... set_robust_list resumed>) = 0 [pid 1145] <... open resumed>) = 4 [pid 1144] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1143] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1142] <... munmap resumed>) = 0 [pid 1137] <... open resumed>) = 6 [pid 1135] close(3 [pid 1134] <... open resumed>) = 6 [pid 1147] memfd_create("syzkaller", 0 [pid 1146] memfd_create("syzkaller", 0 [pid 1145] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1144] <... futex resumed>) = 0 [pid 1143] <... futex resumed>) = 0 [pid 1142] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1137] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1135] <... close resumed>) = 0 [pid 1134] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1147] <... memfd_create resumed>) = 3 [pid 1146] <... memfd_create resumed>) = 3 [pid 1142] <... openat resumed>) = 5 [pid 1137] <... futex resumed>) = 1 [pid 1135] mkdir("./bus", 0777 [pid 1134] <... futex resumed>) = 1 [pid 1132] <... futex resumed>) = 0 [pid 1131] <... futex resumed>) = 0 [pid 1147] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1146] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1142] ioctl(5, LOOP_SET_FD, 3 [pid 1137] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1135] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1134] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1132] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1131] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1147] <... mmap resumed>) = 0x7f6f98beb000 [pid 1146] <... mmap resumed>) = 0x7f6f98beb000 [pid 1142] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1137] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1135] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1133] <... futex resumed>) = 0 [pid 1132] <... futex resumed>) = 0 [pid 1131] <... futex resumed>) = 1 [pid 1145] <... futex resumed>) = 1 [pid 1144] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1143] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1137] openat(-1, "/proc/self/exe", O_RDONLY [pid 1133] openat(-1, "/proc/self/exe", O_RDONLY [pid 1132] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1131] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1145] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1144] <... futex resumed>) = 0 [pid 1143] <... futex resumed>) = 0 [pid 1137] <... openat resumed>) = 3 [pid 1133] <... openat resumed>) = 3 [pid 1144] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1143] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1137] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1133] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1147] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1144] <... mmap resumed>) = 0x7f6f98bca000 [pid 1143] <... mmap resumed>) = 0x7f6f98bca000 [pid 1137] <... futex resumed>) = 1 [pid 1136] <... futex resumed>) = 0 [pid 1133] <... futex resumed>) = 1 [pid 1132] <... futex resumed>) = 0 [pid 1131] <... futex resumed>) = 0 [pid 1147] <... write resumed>) = 1048576 [pid 1146] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1144] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1143] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1137] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1136] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1133] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1132] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1131] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1147] munmap(0x7f6f98beb000, 1048576 [pid 1145] <... futex resumed>) = 0 [pid 1144] <... mprotect resumed>) = 0 [pid 1143] <... mprotect resumed>) = 0 [pid 1137] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1136] <... futex resumed>) = 1 [pid 1133] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1132] <... futex resumed>) = 0 [pid 1131] <... futex resumed>) = 0 [pid 1147] <... munmap resumed>) = 0 [pid 1145] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1144] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1143] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1137] sendfile(6, 3, NULL, 140737974943952 [pid 1136] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1133] sendfile(6, 3, NULL, 140737974943952 [pid 1132] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1131] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1147] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1145] <... mount resumed>) = 0 [pid 1147] <... openat resumed>) = 4 [pid 1145] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1144] <... clone resumed>, parent_tid=[1148], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1148 [ 25.772998][ T1127] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 25.776347][ T1129] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 25.788096][ T1135] loop1: detected capacity change from 0 to 2048 [pid 1143] <... clone resumed>, parent_tid=[1149], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1149 [pid 1147] ioctl(4, LOOP_SET_FD, 3 [pid 1145] <... futex resumed>) = 1 [pid 1144] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1143] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1136] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1149 attached ./strace-static-x86_64: Process 1148 attached [pid 1147] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1146] <... write resumed>) = 1048576 [pid 1145] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1144] <... futex resumed>) = 0 [pid 1143] <... futex resumed>) = 0 [pid 1142] ioctl(5, LOOP_CLR_FD [pid 1136] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1149] set_robust_list(0x7f6f98bea9e0, 24 [pid 1148] set_robust_list(0x7f6f98bea9e0, 24 [pid 1147] ioctl(4, LOOP_CLR_FD [pid 1146] munmap(0x7f6f98beb000, 1048576 [pid 1145] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1144] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1143] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1142] <... ioctl resumed>) = 0 [pid 1137] <... sendfile resumed>) = 1048576 [pid 1133] <... sendfile resumed>) = 1048576 [pid 1147] <... ioctl resumed>) = 0 [pid 1145] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1137] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1133] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1145] <... open resumed>) = 6 [pid 1137] <... futex resumed>) = 1 [pid 1133] <... futex resumed>) = 1 [pid 1132] <... futex resumed>) = 0 [pid 1131] <... futex resumed>) = 0 [pid 1145] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1137] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1133] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1131] exit_group(0 [pid 1145] <... futex resumed>) = 0 [pid 1134] <... futex resumed>) = ? [pid 1133] <... futex resumed>) = ? [pid 1131] <... exit_group resumed>) = ? [pid 1145] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1134] +++ exited with 0 +++ [pid 1133] +++ exited with 0 +++ [pid 1131] +++ exited with 0 +++ [pid 1147] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1147] close(4) = 0 [pid 1147] close(3) = 0 [pid 1147] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1147] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1145] <... futex resumed>) = 0 [pid 1136] <... futex resumed>) = 1 [pid 1146] <... munmap resumed>) = 0 [pid 1145] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1136] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 1136] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1145] <... futex resumed>) = 0 [pid 1136] <... futex resumed>) = 1 [pid 1145] openat(-1, "/proc/self/exe", O_RDONLY [pid 1136] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1145] <... openat resumed>) = 7 [pid 1145] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1136] <... futex resumed>) = 0 [pid 1145] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1136] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1145] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1136] <... futex resumed>) = 0 [pid 1145] sendfile(6, 7, NULL, 140737974943952 [pid 1136] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1149] <... set_robust_list resumed>) = 0 [pid 1148] <... set_robust_list resumed>) = 0 [pid 1146] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1145] <... sendfile resumed>) = 1048576 [pid 1135] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1127] <... ioctl resumed>) = 0 [pid 1149] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1148] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1146] <... openat resumed>) = 4 [pid 1135] ioctl(5, LOOP_CLR_FD [pid 1127] close(7 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1131, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1149] <... open resumed>) = 5 [pid 1148] <... open resumed>) = 3 [pid 1146] ioctl(4, LOOP_SET_FD, 3 [pid 1145] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1127] <... close resumed>) = 0 [pid 1145] <... futex resumed>) = 1 [pid 1136] <... futex resumed>) = 0 [pid 1145] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1135] <... ioctl resumed>) = 0 [pid 1135] close(5) = 0 [pid 1135] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1132] exit_group(0 [pid 1137] <... futex resumed>) = ? [pid 1132] <... exit_group resumed>) = ? [pid 1137] +++ exited with 0 +++ [pid 1135] +++ exited with 0 +++ [pid 1149] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1143] <... futex resumed>) = 0 [pid 1149] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1143] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1149] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1143] <... futex resumed>) = 0 [pid 1149] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1143] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1149] <... mount resumed>) = 0 [pid 1149] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1148] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1143] <... futex resumed>) = 0 [pid 1142] ioctl(5, LOOP_SET_FD, 3 [pid 1127] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1149] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1148] <... futex resumed>) = 1 [pid 1144] <... futex resumed>) = 0 [pid 1143] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1142] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1127] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1149] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1148] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1144] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1143] <... futex resumed>) = 0 [pid 1142] close(5 [pid 1127] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1124] exit_group(0 [pid 409] <... openat resumed>) = 3 [pid 1149] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1147] <... futex resumed>) = 0 [pid 1144] <... futex resumed>) = 1 [pid 1143] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1142] <... close resumed>) = 0 [pid 1128] <... futex resumed>) = ? [pid 1127] <... futex resumed>) = ? [pid 1124] <... exit_group resumed>) = ? [pid 409] ioctl(3, LOOP_CLR_FD [pid 1149] <... open resumed>) = 6 [pid 1147] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1144] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1142] close(3 [pid 1128] +++ exited with 0 +++ [pid 1149] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1147] <... mount resumed>) = 0 [pid 1127] +++ exited with 0 +++ [pid 1124] +++ exited with 0 +++ [pid 1149] <... futex resumed>) = 1 [pid 1147] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1143] <... futex resumed>) = 0 [pid 1149] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1147] <... futex resumed>) = 0 [pid 1143] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1149] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1147] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1144] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1143] <... futex resumed>) = 0 [pid 1142] <... close resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1124, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1149] openat(-1, "/proc/self/exe", O_RDONLY [pid 1144] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1143] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1149] <... openat resumed>) = 7 [pid 1149] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1143] <... futex resumed>) = 0 [pid 1149] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1143] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1149] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1143] <... futex resumed>) = 0 [pid 1149] sendfile(6, 7, NULL, 140737974943952 [pid 1147] <... futex resumed>) = 0 [pid 1146] <... ioctl resumed>) = 0 [pid 1144] <... futex resumed>) = 1 [pid 1143] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1142] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1147] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1146] close(3 [pid 1144] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1142] <... futex resumed>) = 0 [pid 1146] <... close resumed>) = 0 [pid 1142] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1146] mkdir("./bus", 0777 [pid 412] <... openat resumed>) = 3 [pid 1146] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 412] ioctl(3, LOOP_CLR_FD [pid 1146] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1136] exit_group(0 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1145] <... futex resumed>) = ? [pid 1136] <... exit_group resumed>) = ? [pid 412] close(3 [pid 1149] <... sendfile resumed>) = 1048576 [ 25.856654][ T1135] EXT4-fs warning (device loop1): read_mmp_block:107: Error -117 while reading MMP block 64 [ 25.882425][ T1146] loop0: detected capacity change from 0 to 2048 [pid 1145] +++ exited with 0 +++ [pid 1142] <... futex resumed>) = ? [pid 412] <... close resumed>) = 0 [pid 1149] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1150 attached [pid 1149] <... futex resumed>) = 1 [pid 1146] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1143] <... futex resumed>) = 0 [pid 1150] set_robust_list(0x5555564066e0, 24 [pid 1149] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1150 [pid 1150] <... set_robust_list resumed>) = 0 [pid 1150] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1150] setpgid(0, 0) = 0 [pid 1150] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1146] ioctl(4, LOOP_CLR_FD [pid 1150] <... openat resumed>) = 3 [pid 1150] write(3, "1000", 4) = 4 [pid 1150] close(3) = 0 [pid 1150] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1150] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1150] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1146] <... ioctl resumed>) = 0 [pid 1146] close(4 [pid 1150] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1146] <... close resumed>) = 0 [pid 1146] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1146] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1150] <... clone resumed>, parent_tid=[1151], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1151 [pid 1150] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1143] exit_group(0 [pid 1150] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1150] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1149] <... futex resumed>) = ? [pid 1146] <... futex resumed>) = ? [pid 1143] <... exit_group resumed>) = ? [pid 1150] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1149] +++ exited with 0 +++ [pid 1146] +++ exited with 0 +++ [pid 1150] <... mprotect resumed>) = 0 [pid 1150] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1152], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1152 [pid 1150] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1150] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1152 attached [pid 1152] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1152] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1151 attached [pid 1151] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1151] memfd_create("syzkaller", 0) = 4 [pid 1151] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1147] <... open resumed>) = 4 [pid 1142] +++ exited with 0 +++ [pid 1136] +++ exited with 0 +++ [pid 1132] +++ exited with 0 +++ [pid 409] <... ioctl resumed>) = 0 [pid 1147] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1132, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1147] <... futex resumed>) = 1 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1136, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1147] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 408] <... openat resumed>) = 3 [pid 411] <... openat resumed>) = 3 [pid 408] ioctl(3, LOOP_CLR_FD [pid 411] ioctl(3, LOOP_CLR_FD [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 411] <... ioctl resumed>) = 0 [pid 408] close(3 [pid 411] close(3 [pid 408] <... close resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1152] <... open resumed>) = 3 [pid 1144] <... futex resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1152] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1144] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] close(3 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1153 [pid 1152] <... futex resumed>) = 1 [pid 1150] <... futex resumed>) = 0 [pid 1144] <... futex resumed>) = 1 [pid 409] <... close resumed>) = 0 [pid 1152] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1150] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1144] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1153 attached [pid 1152] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1150] <... futex resumed>) = 0 [pid 1147] <... futex resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1154 [pid 1147] openat(-1, "/proc/self/exe", O_RDONLY [pid 1152] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1150] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1155 [pid 1153] set_robust_list(0x5555564066e0, 24 [pid 1152] <... mount resumed>) = 0 [pid 1147] <... openat resumed>) = 5 [pid 1153] <... set_robust_list resumed>) = 0 [pid 1152] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1150] <... futex resumed>) = 0 [pid 1147] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1152] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1150] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1152] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1150] <... futex resumed>) = 0 [pid 1153] <... prctl resumed>) = 0 [pid 1152] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1150] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1147] <... futex resumed>) = 1 [pid 1144] <... futex resumed>) = 0 [pid 1152] <... open resumed>) = 5 [pid 1147] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1144] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] setpgid(0, 0 [pid 1152] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1147] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1144] <... futex resumed>) = 0 [pid 1153] <... setpgid resumed>) = 0 [pid 1152] <... futex resumed>) = 1 [pid 1150] <... futex resumed>) = 0 [pid 1147] sendfile(4, 5, NULL, 140737974943952 [pid 1144] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1153] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1152] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1150] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1147] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1152] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1150] <... futex resumed>) = 0 [pid 1147] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] <... openat resumed>) = 3 [pid 1152] openat(-1, "/proc/self/exe", O_RDONLY [pid 1150] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1147] <... futex resumed>) = 1 [pid 1144] <... futex resumed>) = 0 [pid 1153] write(3, "1000", 4 [pid 1152] <... openat resumed>) = 6 [pid 1147] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1144] exit_group(0 [pid 1153] <... write resumed>) = 4 [pid 1152] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1148] <... futex resumed>) = ? [pid 1147] <... futex resumed>) = ? [pid 1144] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1155 attached ./strace-static-x86_64: Process 1154 attached [pid 1153] close(3 [pid 1152] <... futex resumed>) = 1 [pid 1150] <... futex resumed>) = 0 [pid 1148] +++ exited with 0 +++ [pid 1147] +++ exited with 0 +++ [pid 1144] +++ exited with 0 +++ [pid 1151] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1153] <... close resumed>) = 0 [pid 1152] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1150] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1152] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1150] <... futex resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1144, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1153] <... futex resumed>) = 0 [pid 1152] sendfile(5, 6, NULL, 140737974943952 [pid 1150] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 1154] set_robust_list(0x5555564066e0, 24 [pid 1153] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1152] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1154] <... set_robust_list resumed>) = 0 [pid 1152] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1152] <... futex resumed>) = 1 [pid 1150] <... futex resumed>) = 0 [pid 1153] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1152] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1154] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1153] <... mprotect resumed>) = 0 [pid 410] <... restart_syscall resumed>) = 0 [pid 1155] set_robust_list(0x5555564066e0, 24 [pid 1154] <... prctl resumed>) = 0 [pid 1153] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1155] <... set_robust_list resumed>) = 0 [pid 1154] setpgid(0, 0) = 0 [pid 1155] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1153] <... clone resumed>, parent_tid=[1156], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1156 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1154] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1153] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... openat resumed>) = 3 [pid 1155] <... prctl resumed>) = 0 [pid 1153] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1155] setpgid(0, 0 [pid 1154] <... openat resumed>) = 3 [pid 1153] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] close(3 [pid 1155] <... setpgid resumed>) = 0 [pid 1154] write(3, "1000", 4 [pid 1153] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1155] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1154] <... write resumed>) = 4 [pid 1153] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1154] close(3 [pid 1153] <... mmap resumed>) = 0x7f6fa0fca000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1157 [pid 1155] <... openat resumed>) = 3 [pid 1154] <... close resumed>) = 0 [pid 1153] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1155] write(3, "1000", 4 [pid 1154] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] <... mprotect resumed>) = 0 [pid 1155] <... write resumed>) = 4 [pid 1154] <... futex resumed>) = 0 [pid 1153] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1156 attached [pid 1155] close(3 [pid 1154] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1156] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1156] memfd_create("syzkaller", 0) = 3 [pid 1156] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1153] <... clone resumed>, parent_tid=[1158], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1158 [pid 1154] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1155] <... close resumed>) = 0 [pid 1153] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1155] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1154] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1153] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1158 attached [pid 1158] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1158] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1154] <... mprotect resumed>) = 0 [pid 1155] <... futex resumed>) = 0 [pid 1155] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1154] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1155] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1158] <... open resumed>) = 4 [pid 1158] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1155] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1154] <... clone resumed>, parent_tid=[1159], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1159 [pid 1153] <... futex resumed>) = 0 [pid 1153] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1154] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1155] <... mprotect resumed>) = 0 [pid 1154] <... futex resumed>) = 0 [pid 1153] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1154] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1155] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1154] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1158] <... futex resumed>) = 1 [pid 1158] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1154] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1155] <... clone resumed>, parent_tid=[1160], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1160 [pid 1154] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1155] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1154] <... mprotect resumed>) = 0 [pid 1158] <... mount resumed>) = 0 [pid 1155] <... futex resumed>) = 0 [pid 1154] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1158] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1155] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] <... futex resumed>) = 0 [pid 1153] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1153] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1155] <... futex resumed>) = 0 [pid 1154] <... clone resumed>, parent_tid=[1161], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1161 [pid 1155] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1154] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1155] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1154] <... futex resumed>) = 0 [pid 1154] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1155] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1158] <... futex resumed>) = 1 [pid 1155] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1158] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1158] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1155] <... clone resumed>, parent_tid=[1162], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1162 [pid 1158] <... futex resumed>) = 1 [pid 1155] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] <... futex resumed>) = 0 [pid 1151] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1162 attached ./strace-static-x86_64: Process 1161 attached ./strace-static-x86_64: Process 1160 attached ./strace-static-x86_64: Process 1159 attached ./strace-static-x86_64: Process 1157 attached [pid 1158] openat(-1, "/proc/self/exe", O_RDONLY [pid 1155] <... futex resumed>) = 0 [pid 1153] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [ 25.901046][ T1146] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 1151] munmap(0x7f6f98bca000, 1048576 [pid 1162] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1161] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1160] set_robust_list(0x7f6fa100b9e0, 24 [pid 1159] set_robust_list(0x7f6fa100b9e0, 24 [pid 1158] <... openat resumed>) = 6 [pid 1157] set_robust_list(0x5555564066e0, 24 [pid 1156] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1155] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1153] <... futex resumed>) = 0 [pid 1151] <... munmap resumed>) = 0 [pid 1162] <... set_robust_list resumed>) = 0 [pid 1161] <... set_robust_list resumed>) = 0 [pid 1160] <... set_robust_list resumed>) = 0 [pid 1159] <... set_robust_list resumed>) = 0 [pid 1158] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1157] <... set_robust_list resumed>) = 0 [pid 1153] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1151] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1162] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1161] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1160] memfd_create("syzkaller", 0 [pid 1159] memfd_create("syzkaller", 0 [pid 1158] <... futex resumed>) = 0 [pid 1157] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1153] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1151] <... openat resumed>) = 7 [pid 1162] <... open resumed>) = 3 [pid 1161] <... open resumed>) = 3 [pid 1160] <... memfd_create resumed>) = 4 [pid 1159] <... memfd_create resumed>) = 4 [pid 1158] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1157] <... prctl resumed>) = 0 [pid 1156] <... write resumed>) = 1048576 [pid 1153] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1151] ioctl(7, LOOP_SET_FD, 4 [pid 1143] +++ exited with 0 +++ [pid 1162] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1160] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1158] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1157] setpgid(0, 0 [pid 1156] munmap(0x7f6f98bca000, 1048576 [pid 1153] <... futex resumed>) = 0 [pid 1162] <... futex resumed>) = 1 [pid 1160] <... mmap resumed>) = 0x7f6f98bca000 [pid 1159] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1158] sendfile(5, 6, NULL, 140737974943952 [pid 1157] <... setpgid resumed>) = 0 [pid 1156] <... munmap resumed>) = 0 [pid 1155] <... futex resumed>) = 0 [pid 1153] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1151] <... ioctl resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1143, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1161] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1162] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1160] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1159] <... mmap resumed>) = 0x7f6f98bca000 [pid 1158] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1157] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1161] <... futex resumed>) = 1 [pid 1156] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1155] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1154] <... futex resumed>) = 0 [pid 1151] close(4 [pid 1162] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1161] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1160] <... write resumed>) = 1048576 [pid 1159] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1158] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1157] <... openat resumed>) = 3 [pid 1156] <... openat resumed>) = 7 [pid 1155] <... futex resumed>) = 0 [pid 1154] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1151] <... close resumed>) = 0 [pid 1162] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1161] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1160] munmap(0x7f6f98bca000, 1048576 [pid 1159] <... write resumed>) = 1048576 [pid 1158] <... futex resumed>) = 1 [pid 1157] write(3, "1000", 4 [pid 1156] ioctl(7, LOOP_SET_FD, 3 [pid 1155] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1154] <... futex resumed>) = 0 [pid 1153] <... futex resumed>) = 0 [pid 1151] mkdir("./bus", 0777 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1162] <... mount resumed>) = 0 [pid 1161] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1160] <... munmap resumed>) = 0 [pid 1158] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1157] <... write resumed>) = 4 [pid 1151] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 407] <... openat resumed>) = 3 [pid 1162] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1160] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1159] munmap(0x7f6f98bca000, 1048576 [pid 1157] close(3 [pid 1151] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 407] ioctl(3, LOOP_CLR_FD [pid 1162] <... futex resumed>) = 1 [pid 1160] <... openat resumed>) = 5 [pid 1159] <... munmap resumed>) = 0 [pid 1157] <... close resumed>) = 0 [pid 1155] <... futex resumed>) = 0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1162] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1160] ioctl(5, LOOP_SET_FD, 4 [pid 1159] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1157] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1155] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] close(3 [pid 1162] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1161] <... mount resumed>) = 0 [pid 1156] <... ioctl resumed>) = 0 [pid 1154] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1161] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1156] close(3 [pid 1154] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1161] <... futex resumed>) = 0 [pid 1156] <... close resumed>) = 0 [pid 1154] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1161] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1156] mkdir("./bus", 0777 [pid 1154] <... futex resumed>) = 0 [pid 1161] <... open resumed>) = 5 [pid 1156] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1154] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1161] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1156] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1154] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1161] <... futex resumed>) = 0 [pid 1154] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1162] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1161] openat(-1, "/proc/self/exe", O_RDONLY [pid 1157] <... futex resumed>) = 0 [pid 1155] <... futex resumed>) = 0 [pid 1154] <... futex resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1162] <... open resumed>) = 6 [pid 1161] <... openat resumed>) = 6 [pid 1157] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1155] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1154] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1162] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1161] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1157] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1155] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1154] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1161] <... futex resumed>) = 0 [pid 1154] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1162] <... futex resumed>) = 0 [pid 1161] sendfile(5, 6, NULL, 140737974943952 [pid 1157] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1155] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1154] <... futex resumed>) = 0 [pid 1162] openat(-1, "/proc/self/exe", O_RDONLY [pid 1161] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1157] <... mprotect resumed>) = 0 [pid 1155] <... futex resumed>) = 0 [pid 1154] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1165 [pid 1162] <... openat resumed>) = 7 [pid 1161] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1157] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1155] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1154] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1162] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1161] <... futex resumed>) = 0 [pid 1162] <... futex resumed>) = 0 [pid 1161] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1155] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1162] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1157] <... clone resumed>, parent_tid=[1166], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1166 [pid 1162] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1159] <... openat resumed>) = 7 [pid 1157] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1155] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1162] sendfile(6, 7, NULL, 140737974943952 [pid 1157] <... futex resumed>) = 0 [pid 1155] <... futex resumed>) = 0 [ 25.955585][ T1151] loop5: detected capacity change from 0 to 2048 [ 25.981841][ T1156] loop1: detected capacity change from 0 to 2048 [ 25.984675][ T1160] loop2: detected capacity change from 0 to 2048 [pid 1159] ioctl(7, LOOP_SET_FD, 4 [pid 1162] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1157] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1155] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1162] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1157] <... futex resumed>) = 0 [pid 1155] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 1165 attached [pid 1165] set_robust_list(0x5555564066e0, 24) = 0 [pid 1165] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1165] setpgid(0, 0) = 0 [pid 1165] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1165] write(3, "1000", 4) = 4 [pid 1165] close(3) = 0 [pid 1165] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1165] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1165] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1165] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1167], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1167 [pid 1165] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1165] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1165] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1165] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1165] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1168], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1168 [pid 1165] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1165] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1168 attached [pid 1168] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1168] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1167 attached [pid 1167] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1167] memfd_create("syzkaller", 0) = 4 [pid 1167] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1162] <... futex resumed>) = 0 [pid 1162] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1157] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1157] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1157] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1169], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1169 [pid 1157] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1157] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1166 attached [pid 1160] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1169 attached [pid 1167] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1166] set_robust_list(0x7f6fa100b9e0, 24 [pid 1160] close(4 [pid 1159] <... ioctl resumed>) = 0 [pid 1169] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1166] <... set_robust_list resumed>) = 0 [pid 1160] <... close resumed>) = 0 [pid 1159] close(4 [pid 1169] <... set_robust_list resumed>) = 0 [pid 1166] memfd_create("syzkaller", 0 [pid 1160] mkdir("./bus", 0777 [pid 1159] <... close resumed>) = 0 [pid 1169] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1166] <... memfd_create resumed>) = 3 [pid 1160] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1159] mkdir("./bus", 0777 [pid 1166] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1160] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1159] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1166] <... mmap resumed>) = 0x7f6f98bca000 [pid 1159] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1166] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1166] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1166] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 5 [pid 1166] ioctl(5, LOOP_SET_FD, 3 [pid 1169] <... open resumed>) = 4 [pid 1168] <... open resumed>) = 3 [pid 1166] <... ioctl resumed>) = 0 [pid 1165] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1169] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1168] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1166] close(3 [pid 1165] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1157] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1169] <... futex resumed>) = 0 [pid 1168] <... futex resumed>) = 0 [pid 1166] <... close resumed>) = 0 [pid 1165] <... futex resumed>) = 0 [ 26.001267][ T1159] loop4: detected capacity change from 0 to 2048 [ 26.019486][ T1156] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.031401][ T1151] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.032909][ T1166] loop3: detected capacity change from 0 to 2048 [pid 1157] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1156] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1169] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1168] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1167] <... write resumed>) = 1048576 [pid 1166] mkdir("./bus", 0777 [pid 1165] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1157] <... futex resumed>) = 0 [pid 1169] <... mount resumed>) = 0 [pid 1166] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1157] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1169] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1166] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1157] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1169] <... futex resumed>) = 0 [pid 1168] <... mount resumed>) = 0 [pid 1167] munmap(0x7f6f98bca000, 1048576 [pid 1157] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1156] ioctl(7, LOOP_CLR_FD [pid 1169] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1168] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1167] <... munmap resumed>) = 0 [pid 1157] <... futex resumed>) = 0 [pid 1156] <... ioctl resumed>) = 0 [pid 1169] <... open resumed>) = 3 [pid 1168] <... futex resumed>) = 1 [pid 1167] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1165] <... futex resumed>) = 0 [pid 1157] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1156] close(7 [pid 1169] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1168] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1167] <... openat resumed>) = 5 [pid 1165] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1156] <... close resumed>) = 0 [pid 1168] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1167] ioctl(5, LOOP_SET_FD, 4 [pid 1165] <... futex resumed>) = 0 [pid 1156] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1153] exit_group(0 [pid 1169] <... futex resumed>) = 0 [pid 1168] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1157] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1169] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1157] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1169] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1157] <... futex resumed>) = 0 [pid 1169] openat(-1, "/proc/self/exe", O_RDONLY [pid 1168] <... open resumed>) = 6 [pid 1167] <... ioctl resumed>) = 0 [pid 1165] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1159] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1158] <... futex resumed>) = ? [pid 1157] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1156] <... futex resumed>) = ? [pid 1153] <... exit_group resumed>) = ? [pid 1151] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1169] <... openat resumed>) = 6 [pid 1168] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1167] close(4 [pid 1165] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1159] ioctl(7, LOOP_CLR_FD [pid 1158] +++ exited with 0 +++ [pid 1156] +++ exited with 0 +++ [pid 1153] +++ exited with 0 +++ [pid 1168] <... futex resumed>) = 0 [pid 1167] <... close resumed>) = 0 [pid 1165] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1153, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1168] openat(-1, "/proc/self/exe", O_RDONLY [pid 1167] mkdir("./bus", 0777 [pid 1165] <... futex resumed>) = 0 [pid 1169] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1168] <... openat resumed>) = 4 [pid 1167] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1165] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1151] ioctl(7, LOOP_CLR_FD [pid 1169] <... futex resumed>) = 1 [pid 1168] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1167] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1165] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1157] <... futex resumed>) = 0 [pid 1169] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1168] <... futex resumed>) = 0 [pid 1165] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1159] <... ioctl resumed>) = 0 [pid 1157] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1151] <... ioctl resumed>) = 0 [pid 1168] sendfile(6, 4, NULL, 140737974943952 [pid 1165] <... futex resumed>) = 0 [pid 1165] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1169] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1157] <... futex resumed>) = 0 [pid 1169] sendfile(3, 6, NULL, 140737974943952 [pid 1157] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1151] close(7 [pid 1159] close(7 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1178 [pid 1159] <... close resumed>) = 0 [pid 1151] <... close resumed>) = 0 [pid 1159] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1151] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1154] exit_group(0 [pid 1161] <... futex resumed>) = ? [pid 1154] <... exit_group resumed>) = ? [pid 1161] +++ exited with 0 +++ [pid 1159] <... futex resumed>) = ? [pid 1151] <... futex resumed>) = 0 [pid 1150] exit_group(0) = ? [pid 1152] <... futex resumed>) = ? [pid 1160] <... mount resumed>) = -1 ENOTDIR (Not a directory) [ 26.071266][ T1159] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.089882][ T1160] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.093643][ T1167] loop0: detected capacity change from 0 to 2048 [pid 1160] ioctl(5, LOOP_CLR_FD [pid 1159] +++ exited with 0 +++ [pid 1154] +++ exited with 0 +++ [pid 1152] +++ exited with 0 +++ [pid 1151] +++ exited with 0 +++ [pid 1150] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1150, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1154, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1180 ./strace-static-x86_64: Process 1178 attached [pid 1178] set_robust_list(0x5555564066e0, 24) = 0 [pid 1178] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1178] setpgid(0, 0) = 0 [pid 1178] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1178] write(3, "1000", 4) = 4 [pid 1178] close(3) = 0 [pid 1178] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1178] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1178] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1178] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1181], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1181 [pid 1178] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1178] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1178] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1178] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1178] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1182], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1182 [pid 1178] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1178] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1181 attached [pid 1181] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1181] memfd_create("syzkaller", 0) = 3 [pid 1181] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1169] <... sendfile resumed>) = 1048576 [pid 1169] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1182 attached ./strace-static-x86_64: Process 1180 attached [pid 1181] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1169] <... futex resumed>) = 1 [pid 1168] <... sendfile resumed>) = 1048576 [pid 1157] <... futex resumed>) = 0 [pid 1169] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1168] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1168] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1165] <... futex resumed>) = 0 [pid 1182] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1182] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1180] set_robust_list(0x5555564066e0, 24 [pid 1182] <... open resumed>) = 4 [pid 1180] <... set_robust_list resumed>) = 0 [pid 1180] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1182] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1180] <... prctl resumed>) = 0 [pid 1180] setpgid(0, 0 [pid 1182] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1180] <... setpgid resumed>) = 0 [pid 1180] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1180] write(3, "1000", 4) = 4 [pid 1180] close(3) = 0 [pid 1180] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1180] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1180] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1180] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1178] <... futex resumed>) = 0 [pid 1178] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1182] <... futex resumed>) = 0 [pid 1178] <... futex resumed>) = 1 [pid 1182] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1178] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1167] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1182] <... mount resumed>) = 0 [pid 1167] ioctl(5, LOOP_CLR_FD [pid 1182] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1167] <... ioctl resumed>) = 0 [pid 1182] <... futex resumed>) = 1 [pid 1178] <... futex resumed>) = 0 [pid 1167] close(5 [pid 1182] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1178] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1182] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1178] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1183 attached [pid 1182] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1181] <... write resumed>) = 1048576 [pid 1178] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1167] <... close resumed>) = 0 [pid 1182] <... open resumed>) = 5 [pid 1181] munmap(0x7f6f98bca000, 1048576 [pid 1180] <... clone resumed>, parent_tid=[1183], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1183 [pid 1167] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1165] exit_group(0 [pid 1182] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1181] <... munmap resumed>) = 0 [pid 1180] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1168] <... futex resumed>) = ? [pid 1167] <... futex resumed>) = ? [pid 1165] <... exit_group resumed>) = ? [pid 1182] <... futex resumed>) = 1 [pid 1181] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1180] <... futex resumed>) = 0 [pid 1178] <... futex resumed>) = 0 [pid 1167] +++ exited with 0 +++ [pid 1182] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1181] <... openat resumed>) = 6 [pid 1180] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1178] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1182] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1181] ioctl(6, LOOP_SET_FD, 3 [pid 1180] <... futex resumed>) = 0 [pid 1178] <... futex resumed>) = 0 [pid 1182] openat(-1, "/proc/self/exe", O_RDONLY [pid 1181] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1180] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1178] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1168] +++ exited with 0 +++ [pid 1165] +++ exited with 0 +++ [pid 1182] <... openat resumed>) = 7 [pid 1181] ioctl(6, LOOP_CLR_FD [pid 1180] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1182] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1181] <... ioctl resumed>) = 0 [pid 1180] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1182] <... futex resumed>) = 1 [pid 1180] <... mprotect resumed>) = 0 [pid 1178] <... futex resumed>) = 0 [pid 1182] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1180] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1178] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1182] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1178] <... futex resumed>) = 0 [pid 1166] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1165, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1182] sendfile(5, 7, NULL, 140737974943952 [pid 1180] <... clone resumed>, parent_tid=[1184], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1184 [pid 1178] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1166] ioctl(5, LOOP_CLR_FD [pid 1180] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1181] ioctl(6, LOOP_SET_FD, 3 [pid 1180] <... futex resumed>) = 0 [pid 1181] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1180] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1181] close(6) = 0 [pid 1181] close(3) = 0 [pid 1160] <... ioctl resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 1181] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1160] close(5 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1181] <... futex resumed>) = 0 [pid 1160] <... close resumed>) = 0 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1183] set_robust_list(0x7f6fa100b9e0, 24 [pid 1181] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1160] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1183] <... set_robust_list resumed>) = 0 [pid 1160] <... futex resumed>) = 0 [pid 412] close(3 [pid 1183] memfd_create("syzkaller", 0 [pid 1160] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1183] <... memfd_create resumed>) = 3 [pid 412] <... close resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1183] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1155] exit_group(0 [pid 407] <... openat resumed>) = 3 [pid 1162] <... futex resumed>) = ? [pid 1155] <... exit_group resumed>) = ? [pid 407] ioctl(3, LOOP_CLR_FD [pid 1183] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1182] <... sendfile resumed>) = 1048576 [pid 1162] +++ exited with 0 +++ [pid 1160] <... futex resumed>) = ? [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1185 [pid 407] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1185 attached [pid 1185] set_robust_list(0x5555564066e0, 24) = 0 [pid 1185] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1185] setpgid(0, 0) = 0 [pid 1185] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1160] +++ exited with 0 +++ [pid 1155] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1155, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1182] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] close(3 [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 407] <... close resumed>) = 0 [pid 1182] <... futex resumed>) = 1 [pid 1178] <... futex resumed>) = 0 [pid 1182] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] <... restart_syscall resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1178] exit_group(0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1181] <... futex resumed>) = ? [pid 1178] <... exit_group resumed>) = ? [pid 1182] <... futex resumed>) = ? [pid 1181] +++ exited with 0 +++ [pid 409] <... openat resumed>) = 3 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1186 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1187 [pid 1185] <... openat resumed>) = 3 [pid 1185] write(3, "1000", 4) = 4 [pid 1185] close(3) = 0 [pid 1185] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1185] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1185] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1185] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1188], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1188 [pid 1185] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1185] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1188 attached ./strace-static-x86_64: Process 1187 attached ./strace-static-x86_64: Process 1186 attached ./strace-static-x86_64: Process 1184 attached ) = 0 [pid 1188] set_robust_list(0x7f6fa100b9e0, 24 [pid 1187] set_robust_list(0x5555564066e0, 24 [pid 1186] set_robust_list(0x5555564066e0, 24 [pid 1185] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1184] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1188] <... set_robust_list resumed>) = 0 [pid 1187] <... set_robust_list resumed>) = 0 [pid 1186] <... set_robust_list resumed>) = 0 [pid 1185] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1184] <... set_robust_list resumed>) = 0 [pid 1188] memfd_create("syzkaller", 0 [pid 1187] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1185] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1183] <... write resumed>) = 1048576 [pid 1186] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1185] <... mprotect resumed>) = 0 [pid 1183] munmap(0x7f6f98bca000, 1048576 [pid 1187] <... prctl resumed>) = 0 [pid 1184] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1188] <... memfd_create resumed>) = 3 [pid 1187] setpgid(0, 0 [pid 1186] <... prctl resumed>) = 0 [pid 1185] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1183] <... munmap resumed>) = 0 [pid 1183] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1185] <... clone resumed>, parent_tid=[1189], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1189 [pid 1183] <... openat resumed>) = 5 [pid 1185] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1183] ioctl(5, LOOP_SET_FD, 3 [pid 1185] <... futex resumed>) = 0 [pid 1183] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1185] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1183] ioctl(5, LOOP_CLR_FD) = 0 [pid 1186] setpgid(0, 0./strace-static-x86_64: Process 1189 attached [pid 1189] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1188] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1187] <... setpgid resumed>) = 0 [pid 1186] <... setpgid resumed>) = 0 [pid 1184] <... open resumed>) = 4 [pid 1182] +++ exited with 0 +++ [pid 1178] +++ exited with 0 +++ [pid 1166] <... ioctl resumed>) = 0 [pid 1186] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1183] ioctl(5, LOOP_SET_FD, 3 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1178, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1186] <... openat resumed>) = 3 [pid 1183] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1186] write(3, "1000", 4 [pid 1183] close(5 [pid 1186] <... write resumed>) = 4 [pid 1184] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1183] <... close resumed>) = 0 [pid 1166] close(5 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1180] <... futex resumed>) = 0 [pid 1166] <... close resumed>) = 0 [pid 1184] <... futex resumed>) = 1 [pid 1180] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1184] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1180] <... futex resumed>) = 0 [pid 1166] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1180] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1166] <... futex resumed>) = 0 [pid 1187] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1186] close(3 [pid 1184] <... mount resumed>) = 0 [pid 1183] close(3 [pid 1166] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] <... openat resumed>) = 3 [pid 1184] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1183] <... close resumed>) = 0 [pid 1180] <... futex resumed>) = 0 [pid 1186] <... close resumed>) = 0 [pid 1184] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1180] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1157] exit_group(0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1186] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1184] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1180] <... futex resumed>) = 0 [pid 1169] <... futex resumed>) = ? [pid 1166] <... futex resumed>) = ? [pid 1157] <... exit_group resumed>) = ? [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1187] <... openat resumed>) = 3 [pid 1186] <... futex resumed>) = 0 [pid 1184] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1183] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1180] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1169] +++ exited with 0 +++ [pid 1187] write(3, "1000", 4 [pid 1186] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1183] <... futex resumed>) = 0 [pid 408] close(3 [pid 1187] <... write resumed>) = 4 [pid 1186] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1183] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1187] close(3 [pid 1186] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 408] <... close resumed>) = 0 [pid 1187] <... close resumed>) = 0 [pid 1187] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1186] <... mprotect resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1187] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1187] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1187] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1188] <... mmap resumed>) = 0x7f6f98bca000 [pid 1187] <... clone resumed>, parent_tid=[1191], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1191 [pid 1186] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1190 ./strace-static-x86_64: Process 1192 attached ./strace-static-x86_64: Process 1190 attached [pid 1188] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [ 26.125325][ T1166] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.145793][ T1167] EXT4-fs (loop0): get root inode failed [ 26.151922][ T1167] EXT4-fs (loop0): mount failed [pid 1187] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1187] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1192] set_robust_list(0x7f6fa100b9e0, 24 [pid 1190] set_robust_list(0x5555564066e0, 24 [pid 1187] <... futex resumed>) = 0 [pid 1186] <... clone resumed>, parent_tid=[1192], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1192 [pid 1189] <... set_robust_list resumed>) = 0 [pid 1187] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1192] <... set_robust_list resumed>) = 0 [pid 1190] <... set_robust_list resumed>) = 0 [pid 1189] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1187] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1186] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1187] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1186] <... futex resumed>) = 0 [pid 1192] memfd_create("syzkaller", 0 [pid 1190] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1187] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1186] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1193 attached [pid 1192] <... memfd_create resumed>) = 3 [pid 1190] <... prctl resumed>) = 0 [pid 1187] <... clone resumed>, parent_tid=[1193], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1193 [pid 1187] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1187] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1186] <... futex resumed>) = 0 [pid 1193] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1192] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1190] setpgid(0, 0 [pid 1186] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1193] <... set_robust_list resumed>) = 0 [pid 1192] <... mmap resumed>) = 0x7f6f98bca000 [pid 1190] <... setpgid resumed>) = 0 [pid 1186] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1190] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1186] <... mprotect resumed>) = 0 [pid 1186] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1190] <... openat resumed>) = 3 [pid 1190] write(3, "1000", 4 [pid 1186] <... clone resumed>, parent_tid=[1194], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1194 [pid 1190] <... write resumed>) = 4 [pid 1186] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1190] close(3) = 0 [pid 1186] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1194 attached [pid 1193] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1192] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1190] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1190] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1188] <... write resumed>) = 1048576 [pid 1190] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1194] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1190] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 1191 attached [pid 1191] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1194] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1191] memfd_create("syzkaller", 0 [pid 1190] <... mprotect resumed>) = 0 [pid 1190] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1191] <... memfd_create resumed>) = 4 [pid 1191] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1190] <... clone resumed>, parent_tid=[1195], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1195 [pid 1190] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1188] munmap(0x7f6f98bca000, 1048576 [pid 1190] <... futex resumed>) = 0 [pid 1188] <... munmap resumed>) = 0 [pid 1188] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 1190] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1188] ioctl(5, LOOP_SET_FD, 3./strace-static-x86_64: Process 1195 attached [pid 1192] <... write resumed>) = 1048576 [pid 1190] <... futex resumed>) = 0 [pid 1195] set_robust_list(0x7f6fa100b9e0, 24 [pid 1192] munmap(0x7f6f98bca000, 1048576 [pid 1190] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1188] <... ioctl resumed>) = 0 [pid 1195] <... set_robust_list resumed>) = 0 [pid 1192] <... munmap resumed>) = 0 [pid 1190] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1195] memfd_create("syzkaller", 0 [pid 1192] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1190] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1188] close(3 [pid 1195] <... memfd_create resumed>) = 3 [pid 1192] <... openat resumed>) = 5 [pid 1190] <... mprotect resumed>) = 0 [pid 1188] <... close resumed>) = 0 [pid 1195] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1192] ioctl(5, LOOP_SET_FD, 3 [pid 1191] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1195] <... mmap resumed>) = 0x7f6f98bca000 [pid 1192] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1190] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1188] mkdir("./bus", 0777 [pid 1191] <... write resumed>) = 1048576 [pid 1192] ioctl(5, LOOP_CLR_FD [pid 1191] munmap(0x7f6f98bca000, 1048576 [pid 1192] <... ioctl resumed>) = 0 [pid 1191] <... munmap resumed>) = 0 [pid 1190] <... clone resumed>, parent_tid=[1196], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1196 [pid 1191] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 5 [pid 1190] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1185] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1191] ioctl(5, LOOP_SET_FD, 4 [pid 1190] <... futex resumed>) = 0 [pid 1185] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}./strace-static-x86_64: Process 1196 attached [pid 1195] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1190] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1188] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1185] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1196] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1195] <... write resumed>) = 1048576 [pid 1192] ioctl(5, LOOP_SET_FD, 3 [pid 1188] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1196] <... set_robust_list resumed>) = 0 [pid 1195] munmap(0x7f6f98bca000, 1048576 [pid 1192] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1196] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1195] <... munmap resumed>) = 0 [pid 1192] close(5 [pid 1195] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1192] <... close resumed>) = 0 [pid 1195] <... openat resumed>) = 5 [pid 1192] close(3 [pid 1185] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1191] <... ioctl resumed>) = 0 [pid 1185] <... futex resumed>) = 0 [pid 1191] close(4 [pid 1185] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1191] <... close resumed>) = 0 [pid 1185] <... mmap resumed>) = 0x7f6f98ca9000 [pid 1191] mkdir("./bus", 0777 [pid 1185] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE [pid 1191] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1185] <... mprotect resumed>) = 0 [pid 1191] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1185] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1197], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 1197 [pid 1185] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1192] <... close resumed>) = 0 [pid 1185] <... futex resumed>) = 0 [pid 1185] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1197 attached [pid 1197] set_robust_list(0x7f6f98cc99e0, 24) = 0 [pid 1195] ioctl(5, LOOP_SET_FD, 3 [pid 1192] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1184] <... open resumed>) = 3 [pid 1194] <... open resumed>) = 4 [pid 1193] <... open resumed>) = 3 [pid 1192] <... futex resumed>) = 0 [pid 1189] <... open resumed>) = 4 [pid 1184] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1194] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1192] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1184] <... futex resumed>) = 1 [pid 1180] <... futex resumed>) = 0 [pid 1197] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1196] <... open resumed>) = 4 [pid 1194] <... futex resumed>) = 1 [pid 1193] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1189] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1186] <... futex resumed>) = 0 [pid 1197] <... mount resumed>) = 0 [pid 1196] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1193] <... futex resumed>) = 1 [pid 1189] <... futex resumed>) = 0 [pid 1187] <... futex resumed>) = 0 [pid 1197] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1196] <... futex resumed>) = 1 [pid 1193] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1189] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1187] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1197] <... futex resumed>) = 1 [pid 1196] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1193] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1187] <... futex resumed>) = 0 [pid 1185] <... futex resumed>) = 0 [pid 1197] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1193] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1187] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1185] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1193] <... mount resumed>) = 0 [pid 1189] <... futex resumed>) = 0 [pid 1185] <... futex resumed>) = 1 [pid 1193] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1189] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1185] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1193] <... futex resumed>) = 1 [pid 1189] <... open resumed>) = 3 [pid 1187] <... futex resumed>) = 0 [pid 1190] <... futex resumed>) = 0 [pid 1194] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1193] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1192] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1190] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1189] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1187] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1186] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1184] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1180] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1196] <... futex resumed>) = 0 [pid 1193] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1192] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1190] <... futex resumed>) = 1 [pid 1189] <... futex resumed>) = 1 [pid 1187] <... futex resumed>) = 0 [pid 1186] <... futex resumed>) = 0 [pid 1185] <... futex resumed>) = 0 [pid 1183] <... futex resumed>) = 0 [pid 1180] <... futex resumed>) = 1 [pid 1196] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1193] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1192] <... mount resumed>) = 0 [pid 1190] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1189] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1187] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1186] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1185] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1183] openat(-1, "/proc/self/exe", O_RDONLY [pid 1180] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1196] <... mount resumed>) = 0 [pid 1195] <... ioctl resumed>) = 0 [pid 1193] <... open resumed>) = 4 [pid 1192] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1189] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1185] <... futex resumed>) = 0 [pid 1186] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1196] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1193] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1189] openat(-1, "/proc/self/exe", O_RDONLY [pid 1185] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1183] <... openat resumed>) = 5 [pid 1196] <... futex resumed>) = 1 [pid 1193] <... futex resumed>) = 1 [pid 1192] <... futex resumed>) = 0 [pid 1190] <... futex resumed>) = 0 [pid 1189] <... openat resumed>) = 6 [pid 1187] <... futex resumed>) = 0 [pid 1186] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1183] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1195] close(3 [pid 1196] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1195] <... close resumed>) = 0 [pid 1192] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1190] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1186] <... futex resumed>) = 0 [pid 1183] <... futex resumed>) = 1 [pid 1180] <... futex resumed>) = 0 [pid 1196] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1195] mkdir("./bus", 0777 [pid 1192] <... open resumed>) = 3 [pid 1190] <... futex resumed>) = 0 [pid 1186] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1183] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1180] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1196] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1195] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1192] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1190] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1186] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1183] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1180] <... futex resumed>) = 0 [pid 1196] <... open resumed>) = 3 [pid 1195] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1192] <... futex resumed>) = 0 [pid 1186] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1183] sendfile(3, 5, NULL, 140737974943952 [pid 1180] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1196] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1192] openat(-1, "/proc/self/exe", O_RDONLY [pid 1186] <... futex resumed>) = 0 [pid 1183] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1196] <... futex resumed>) = 1 [pid 1192] <... openat resumed>) = 5 [pid 1190] <... futex resumed>) = 0 [pid 1186] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1183] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1196] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1192] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1190] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1186] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1183] <... futex resumed>) = 1 [pid 1180] <... futex resumed>) = 0 [pid 1196] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1192] <... futex resumed>) = 0 [pid 1190] <... futex resumed>) = 0 [pid 1186] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1183] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1180] exit_group(0 [pid 1196] openat(-1, "/proc/self/exe", O_RDONLY [pid 1193] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1192] sendfile(3, 5, NULL, 140737974943952 [pid 1190] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1189] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1187] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1186] <... futex resumed>) = 0 [pid 1184] <... futex resumed>) = ? [pid 1183] <... futex resumed>) = ? [pid 1180] <... exit_group resumed>) = ? [pid 1166] +++ exited with 0 +++ [pid 1157] +++ exited with 0 +++ [pid 1196] <... openat resumed>) = 6 [ 26.222982][ T1188] loop5: detected capacity change from 0 to 2048 [ 26.236632][ T1191] loop2: detected capacity change from 0 to 2048 [ 26.247763][ T1195] loop1: detected capacity change from 0 to 2048 [ 26.258067][ T1188] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1186] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1184] +++ exited with 0 +++ [pid 1183] +++ exited with 0 +++ [pid 1180] +++ exited with 0 +++ [pid 1196] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1190] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1180, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1196] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1190] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1196] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1190] <... futex resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 1196] sendfile(3, 6, NULL, 140737974943952 [pid 1190] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1202 [pid 1193] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1189] <... futex resumed>) = 1 [pid 1187] <... futex resumed>) = 0 [pid 1185] <... futex resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1157, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 1193] openat(-1, "/proc/self/exe", O_RDONLY [pid 1189] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1187] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1185] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1189] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1193] <... openat resumed>) = 6 [pid 1189] sendfile(3, 6, NULL, 140737974943952 [pid 1193] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1185] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR./strace-static-x86_64: Process 1202 attached [pid 1202] set_robust_list(0x5555564066e0, 24) = 0 [pid 1202] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1202] setpgid(0, 0) = 0 [pid 1202] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1202] write(3, "1000", 4 [pid 410] <... openat resumed>) = 3 [pid 1202] <... write resumed>) = 4 [pid 1202] close(3 [pid 1193] <... futex resumed>) = 1 [pid 1187] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1202] <... close resumed>) = 0 [pid 1202] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1202] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1187] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1193] sendfile(4, 6, NULL, 140737974943952 [pid 1187] <... futex resumed>) = 0 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1187] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1202] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1202] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1202] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1202] <... clone resumed>, parent_tid=[1205], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1205 [pid 1202] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1202] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1206 [pid 1202] <... futex resumed>) = 0 [pid 1202] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1202] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1202] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1207], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1207 [pid 1202] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1202] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1205 attached [pid 1205] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1205] memfd_create("syzkaller", 0) = 3 [pid 1205] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1205] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1205] munmap(0x7f6f98bca000, 1048576) = 0 [ 26.269505][ T1191] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.285071][ T1203] EXT4-fs warning (device loop1): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [pid 1190] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1186] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1192] <... sendfile resumed>) = 1048576 [pid 1192] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1192] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1207 attached ./strace-static-x86_64: Process 1206 attached [pid 1205] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1191] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1188] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1196] <... sendfile resumed>) = 1048576 [pid 1191] ioctl(5, LOOP_CLR_FD [pid 1196] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1191] <... ioctl resumed>) = 0 [pid 1188] ioctl(5, LOOP_CLR_FD [pid 1186] exit_group(0 [pid 1207] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1206] set_robust_list(0x5555564066e0, 24 [pid 1205] <... openat resumed>) = 4 [pid 1196] <... futex resumed>) = 0 [pid 1195] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1194] <... futex resumed>) = ? [pid 1192] <... futex resumed>) = ? [pid 1191] close(5 [pid 1186] <... exit_group resumed>) = ? [pid 1207] <... set_robust_list resumed>) = 0 [pid 1206] <... set_robust_list resumed>) = 0 [pid 1205] ioctl(4, LOOP_SET_FD, 3 [pid 1196] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1195] ioctl(5, LOOP_CLR_FD [pid 1194] +++ exited with 0 +++ [pid 1192] +++ exited with 0 +++ [pid 1191] <... close resumed>) = 0 [pid 1187] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1186] +++ exited with 0 +++ [pid 1185] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 26.316754][ T1195] EXT4-fs (loop1): get root inode failed [ 26.337097][ T1195] EXT4-fs (loop1): mount failed [pid 1207] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1206] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1202] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1193] <... sendfile resumed>) = 1048576 [pid 1191] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1189] <... sendfile resumed>) = 1048576 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1186, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1207] <... open resumed>) = 5 [pid 1206] <... prctl resumed>) = 0 [pid 1195] <... ioctl resumed>) = 0 [pid 1193] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1191] <... futex resumed>) = 0 [pid 1207] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1193] <... futex resumed>) = 0 [pid 1191] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1207] <... futex resumed>) = 0 [pid 1193] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1207] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 407] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 407] close(3) = 0 [pid 1187] exit_group(0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1193] <... futex resumed>) = ? [pid 1191] <... futex resumed>) = ? [pid 1187] <... exit_group resumed>) = ? [pid 1193] +++ exited with 0 +++ [pid 1191] +++ exited with 0 +++ [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1208 [pid 1195] close(5) = 0 [pid 1195] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1195] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1202] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1206] setpgid(0, 0 [pid 1190] exit_group(0 [pid 1187] +++ exited with 0 +++ [pid 1207] <... futex resumed>) = 0 [pid 1206] <... setpgid resumed>) = 0 [pid 1202] <... futex resumed>) = 1 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1187, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1207] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1206] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1202] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1196] <... futex resumed>) = ? [pid 1190] <... exit_group resumed>) = ? [pid 1207] <... mount resumed>) = 0 [pid 1196] +++ exited with 0 +++ [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 1207] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... restart_syscall resumed>) = 0 [pid 1207] <... futex resumed>) = 1 [pid 1206] <... openat resumed>) = 3 [pid 1202] <... futex resumed>) = 0 [pid 1207] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1206] write(3, "1000", 4 [pid 1202] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1207] <... open resumed>) = 6 [pid 1206] <... write resumed>) = 4 [pid 1202] <... futex resumed>) = 0 [pid 1207] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1206] close(3 [pid 1202] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1207] <... futex resumed>) = 0 [pid 1206] <... close resumed>) = 0 [pid 1202] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 409] <... openat resumed>) = 3 [pid 1207] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1206] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1202] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] ioctl(3, LOOP_CLR_FD [pid 1207] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1206] <... futex resumed>) = 0 [pid 1202] <... futex resumed>) = 0 [pid 1195] <... futex resumed>) = ? [pid 1189] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... ioctl resumed>) = 0 [pid 1207] openat(-1, "/proc/self/exe", O_RDONLY [pid 1206] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1202] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1195] +++ exited with 0 +++ [pid 1190] +++ exited with 0 +++ [pid 1189] <... futex resumed>) = 0 [pid 409] close(3 [pid 1207] <... openat resumed>) = 7 [pid 1206] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1189] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] <... close resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1190, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1207] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1206] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1207] <... futex resumed>) = 1 [pid 1206] <... mprotect resumed>) = 0 [pid 1202] <... futex resumed>) = 0 [pid 1207] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1209 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1207] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1206] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1202] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... openat resumed>) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 1208 attached [pid 1207] sendfile(6, 7, NULL, 140737974943952 [pid 1202] <... futex resumed>) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1211 [pid 1205] <... ioctl resumed>) = 0 [pid 1205] close(3) = 0 [pid 1205] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1205] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1188] <... ioctl resumed>) = 0 [pid 1206] <... clone resumed>, parent_tid=[1210], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1210 [pid 1202] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1188] close(5 [pid 1208] set_robust_list(0x5555564066e0, 24 [pid 1206] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1188] <... close resumed>) = 0 [pid 1206] <... futex resumed>) = 0 [pid 1208] <... set_robust_list resumed>) = 0 [pid 1206] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1188] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1206] <... futex resumed>) = 0 [pid 1185] exit_group(0 [pid 1197] <... futex resumed>) = ? [pid 1185] <... exit_group resumed>) = ? [pid 1206] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1197] +++ exited with 0 +++ [pid 1189] <... futex resumed>) = ? [pid 1206] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1189] +++ exited with 0 +++ [pid 1206] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1206] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1188] <... futex resumed>) = ? [pid 1206] <... clone resumed>, parent_tid=[1212], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1212 [pid 1208] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1206] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1208] <... prctl resumed>) = 0 [pid 1206] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1208] setpgid(0, 0 [pid 1207] <... sendfile resumed>) = 1048576 ./strace-static-x86_64: Process 1209 attached ./strace-static-x86_64: Process 1211 attached [pid 1211] set_robust_list(0x5555564066e0, 24 [pid 1208] <... setpgid resumed>) = 0 [pid 1207] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1209] set_robust_list(0x5555564066e0, 24 [pid 1207] <... futex resumed>) = 1 [pid 1202] <... futex resumed>) = 0 [pid 1211] <... set_robust_list resumed>) = 0 [pid 1208] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1207] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1209] <... set_robust_list resumed>) = 0 [pid 1208] <... openat resumed>) = 3 [pid 1208] write(3, "1000", 4) = 4 [pid 1209] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1208] close(3 [pid 1209] <... prctl resumed>) = 0 [pid 1211] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1209] setpgid(0, 0 [pid 1208] <... close resumed>) = 0 [pid 1211] <... prctl resumed>) = 0 [pid 1211] setpgid(0, 0 [pid 1209] <... setpgid resumed>) = 0 ./strace-static-x86_64: Process 1212 attached ./strace-static-x86_64: Process 1210 attached [pid 1211] <... setpgid resumed>) = 0 [pid 1209] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1208] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1205] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1212] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1210] set_robust_list(0x7f6fa100b9e0, 24 [pid 1208] <... futex resumed>) = 0 [pid 1212] <... set_robust_list resumed>) = 0 [pid 1211] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1210] <... set_robust_list resumed>) = 0 [pid 1208] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1212] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1209] <... openat resumed>) = 3 [pid 1205] ioctl(4, LOOP_CLR_FD [pid 1212] <... open resumed>) = 3 [pid 1211] <... openat resumed>) = 3 [pid 1210] memfd_create("syzkaller", 0 [pid 1209] write(3, "1000", 4 [pid 1208] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1205] <... ioctl resumed>) = 0 [pid 1212] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1211] write(3, "1000", 4 [pid 1209] <... write resumed>) = 4 [pid 1205] close(4 [pid 1212] <... futex resumed>) = 1 [pid 1210] <... memfd_create resumed>) = 4 [pid 1208] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1206] <... futex resumed>) = 0 [pid 1211] <... write resumed>) = 4 [pid 1209] close(3 [pid 1205] <... close resumed>) = 0 [pid 1211] close(3 [pid 1209] <... close resumed>) = 0 [pid 1205] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1211] <... close resumed>) = 0 [pid 1209] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1205] <... futex resumed>) = 0 [pid 1211] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1209] <... futex resumed>) = 0 [pid 1205] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1211] <... futex resumed>) = 0 [pid 1209] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1211] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1209] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1211] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1209] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1211] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1212] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1211] <... mprotect resumed>) = 0 [pid 1210] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1209] <... mprotect resumed>) = 0 [pid 1208] <... mprotect resumed>) = 0 [pid 1206] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1212] <... mount resumed>) = 0 [pid 1211] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1210] <... mmap resumed>) = 0x7f6f98bca000 [pid 1209] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1208] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1206] <... futex resumed>) = 0 [pid 1212] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1211] <... clone resumed>, parent_tid=[1213], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1213 [pid 1209] <... clone resumed>, parent_tid=[1214], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1214 [pid 1211] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1209] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1211] <... futex resumed>) = 0 [pid 1209] <... futex resumed>) = 0 [pid 1211] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1209] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1211] <... futex resumed>) = 0 [pid 1209] <... futex resumed>) = 0 [pid 1211] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1209] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1211] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1209] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1211] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1209] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1211] <... mprotect resumed>) = 0 [pid 1209] <... mprotect resumed>) = 0 [pid 1211] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1209] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1211] <... clone resumed>, parent_tid=[1215], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1215 [pid 1209] <... clone resumed>, parent_tid=[1216], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1216 [pid 1211] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1209] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1211] <... futex resumed>) = 0 [pid 1209] <... futex resumed>) = 0 [pid 1211] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1209] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1213 attached ./strace-static-x86_64: Process 1214 attached [pid 1214] set_robust_list(0x7f6fa100b9e0, 24 [pid 1213] set_robust_list(0x7f6fa100b9e0, 24 [pid 1214] <... set_robust_list resumed>) = 0 [pid 1213] <... set_robust_list resumed>) = 0 [pid 1214] memfd_create("syzkaller", 0 [pid 1213] memfd_create("syzkaller", 0 [pid 1214] <... memfd_create resumed>) = 3 ./strace-static-x86_64: Process 1216 attached [pid 1213] <... memfd_create resumed>) = 3 [pid 1216] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1216] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1206] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1212] <... futex resumed>) = 0 [pid 1206] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1202] exit_group(0 [pid 1212] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1208] <... clone resumed>, parent_tid=[1217], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1217 [pid 1207] <... futex resumed>) = ? [pid 1206] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1205] <... futex resumed>) = ? [pid 1202] <... exit_group resumed>) = ? [pid 1212] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1210] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1208] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1207] +++ exited with 0 +++ [pid 1206] <... futex resumed>) = 0 [pid 1205] +++ exited with 0 +++ [pid 1216] <... open resumed>) = 4 [pid 1214] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1213] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1212] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1208] <... futex resumed>) = 0 [pid 1206] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1212] <... open resumed>) = 5 [pid 1208] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1212] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1208] <... futex resumed>) = 0 [pid 1212] <... futex resumed>) = 1 [pid 1208] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1206] <... futex resumed>) = 0 [pid 1212] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1208] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1206] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1216] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1212] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1208] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1206] <... futex resumed>) = 0 [pid 1216] <... futex resumed>) = 1 [pid 1212] openat(-1, "/proc/self/exe", O_RDONLY [pid 1209] <... futex resumed>) = 0 [pid 1208] <... mprotect resumed>) = 0 [pid 1206] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1216] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1212] <... openat resumed>) = 6 [pid 1209] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1208] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1217 attached ./strace-static-x86_64: Process 1215 attached [pid 1216] <... mount resumed>) = 0 [pid 1214] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1212] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1210] <... write resumed>) = 1048576 [pid 1209] <... futex resumed>) = 0 [pid 1188] +++ exited with 0 +++ [pid 1185] +++ exited with 0 +++ [pid 1216] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1209] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1185, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 1216] <... futex resumed>) = 0 [pid 1209] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 1216] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1212] <... futex resumed>) = 1 [pid 1209] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1206] <... futex resumed>) = 0 [pid 412] <... restart_syscall resumed>) = 0 [pid 1216] <... open resumed>) = 5 [pid 1212] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1210] munmap(0x7f6f98bca000, 1048576 [pid 1209] <... futex resumed>) = 0 [pid 1208] <... clone resumed>, parent_tid=[1218], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1218 [pid 1206] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1218 attached [pid 1217] set_robust_list(0x7f6fa100b9e0, 24 [pid 1216] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1215] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1212] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1210] <... munmap resumed>) = 0 [pid 1209] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1208] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1206] <... futex resumed>) = 0 [pid 1218] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1217] <... set_robust_list resumed>) = 0 [pid 1216] <... futex resumed>) = 0 [pid 1215] <... set_robust_list resumed>) = 0 [pid 1212] sendfile(5, 6, NULL, 140737974943952 [pid 1210] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1209] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1208] <... futex resumed>) = 0 [pid 1206] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1218] <... set_robust_list resumed>) = 0 [pid 1217] memfd_create("syzkaller", 0 [pid 1216] openat(-1, "/proc/self/exe", O_RDONLY [pid 1215] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1212] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1210] <... openat resumed>) = 7 [pid 1209] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1208] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... openat resumed>) = 3 [pid 1218] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1217] <... memfd_create resumed>) = 3 [pid 1216] <... openat resumed>) = 6 [pid 1215] <... open resumed>) = 4 [pid 1213] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1212] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1210] ioctl(7, LOOP_SET_FD, 4 [pid 1209] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [ 26.357443][ T1205] loop4: detected capacity change from 0 to 2048 [ 26.382828][ T1205] EXT4-fs (loop4): VFS: Can't find ext4 filesystem [pid 1216] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1209] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1216] <... futex resumed>) = 0 [pid 1214] <... write resumed>) = 1048576 [pid 1212] <... futex resumed>) = 1 [pid 1209] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1206] <... futex resumed>) = 0 [pid 412] close(3 [pid 1216] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1209] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... close resumed>) = 0 [pid 1216] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1209] <... futex resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1216] sendfile(5, 6, NULL, 140737974943952 [pid 1209] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1216] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1219 [pid 1216] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1209] <... futex resumed>) = 0 [pid 1216] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1217] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1215] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1212] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1218] <... open resumed>) = 4 [pid 1218] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1217] <... mmap resumed>) = 0x7f6f98bca000 [pid 1215] <... futex resumed>) = 1 [pid 1211] <... futex resumed>) = 0 [pid 1210] <... ioctl resumed>) = 0 [pid 1211] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1211] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1215] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1213] <... write resumed>) = 1048576 [pid 1215] <... mount resumed>) = 0 [pid 1215] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1214] munmap(0x7f6f98bca000, 1048576 [pid 1215] <... futex resumed>) = 1 [pid 1211] <... futex resumed>) = 0 [pid 1213] munmap(0x7f6f98bca000, 1048576 [pid 1211] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1215] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1214] <... munmap resumed>) = 0 [pid 1213] <... munmap resumed>) = 0 [pid 1211] <... futex resumed>) = 0 [pid 1214] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1213] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1211] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1219 attached [pid 1214] <... openat resumed>) = 7 [pid 1219] set_robust_list(0x5555564066e0, 24 [pid 1214] ioctl(7, LOOP_SET_FD, 3 [pid 1218] <... futex resumed>) = 1 [pid 1217] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1210] close(4 [pid 1208] <... futex resumed>) = 0 [pid 1219] <... set_robust_list resumed>) = 0 [pid 1218] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1214] <... ioctl resumed>) = 0 [pid 1208] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1219] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1218] <... mount resumed>) = 0 [pid 1214] close(3 [pid 1210] <... close resumed>) = 0 [pid 1208] <... futex resumed>) = 0 [pid 1219] <... prctl resumed>) = 0 [pid 1218] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1214] <... close resumed>) = 0 [pid 1210] mkdir("./bus", 0777 [pid 1208] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1219] setpgid(0, 0 [pid 1218] <... futex resumed>) = 0 [pid 1217] <... write resumed>) = 1048576 [pid 1214] mkdir("./bus", 0777 [pid 1210] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1208] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1219] <... setpgid resumed>) = 0 [pid 1217] munmap(0x7f6f98bca000, 1048576 [pid 1210] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1208] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1219] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1218] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1217] <... munmap resumed>) = 0 [pid 1214] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1208] <... futex resumed>) = 0 [pid 1217] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1208] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1219] <... openat resumed>) = 3 [pid 1219] write(3, "1000", 4 [pid 1217] <... openat resumed>) = 5 [pid 1219] <... write resumed>) = 4 [pid 1217] ioctl(5, LOOP_SET_FD, 3 [pid 1219] close(3 [pid 1214] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1219] <... close resumed>) = 0 [pid 1219] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1219] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1219] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1219] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1220], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1220 [pid 1219] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1219] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1219] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1219] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1219] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1221], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1221 [pid 1219] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1219] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1213] <... openat resumed>) = 6 [pid 1202] +++ exited with 0 +++ [pid 1213] ioctl(6, LOOP_SET_FD, 3 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1202, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1215] <... open resumed>) = 5 [pid 1213] <... ioctl resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 1213] close(3 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1215] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1213] <... close resumed>) = 0 [pid 411] <... ioctl resumed>) = 0 [pid 1215] <... futex resumed>) = 1 [pid 1213] mkdir("./bus", 0777 [pid 1211] <... futex resumed>) = 0 [pid 411] close(3 [pid 1215] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1213] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1211] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... close resumed>) = 0 [pid 1215] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1213] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1211] <... futex resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1221 attached ./strace-static-x86_64: Process 1220 attached [pid 1215] openat(-1, "/proc/self/exe", O_RDONLY [pid 1211] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1220] set_robust_list(0x7f6fa100b9e0, 24 [pid 1215] <... openat resumed>) = 3 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1225 [pid 1220] <... set_robust_list resumed>) = 0 [pid 1215] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1221] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1215] <... futex resumed>) = 1 [pid 1211] <... futex resumed>) = 0 [pid 1221] <... set_robust_list resumed>) = 0 [pid 1220] memfd_create("syzkaller", 0 [pid 1215] sendfile(5, 3, NULL, 140737974943952 [pid 1211] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1221] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1211] <... futex resumed>) = 0 [pid 1220] <... memfd_create resumed>) = 3 [pid 1218] <... open resumed>) = 6 [pid 1217] <... ioctl resumed>) = 0 [pid 1211] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1220] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1218] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1215] <... sendfile resumed>) = 1048576 [pid 1221] <... open resumed>) = 4 [pid 1220] <... mmap resumed>) = 0x7f6f98bca000 [pid 1218] <... futex resumed>) = 1 [ 26.421771][ T1210] loop3: detected capacity change from 0 to 2048 [ 26.432602][ T1214] loop2: detected capacity change from 0 to 2048 [ 26.444524][ T1217] loop0: detected capacity change from 0 to 2048 [ 26.453974][ T1213] loop1: detected capacity change from 0 to 2048 [pid 1217] close(3 [pid 1215] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1208] <... futex resumed>) = 0 [pid 1218] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1208] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1218] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1208] <... futex resumed>) = 0 [pid 1218] openat(-1, "/proc/self/exe", O_RDONLY [pid 1208] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1225 attached [pid 1218] <... openat resumed>) = 7 [pid 1225] set_robust_list(0x5555564066e0, 24 [pid 1218] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1225] <... set_robust_list resumed>) = 0 [pid 1218] <... futex resumed>) = 1 [pid 1208] <... futex resumed>) = 0 [pid 1225] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1218] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1208] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1225] <... prctl resumed>) = 0 [pid 1218] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1208] <... futex resumed>) = 0 [pid 1225] setpgid(0, 0 [pid 1218] sendfile(6, 7, NULL, 140737974943952 [pid 1208] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1225] <... setpgid resumed>) = 0 [pid 1225] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1225] write(3, "1000", 4) = 4 [pid 1225] close(3) = 0 [pid 1225] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1219] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1225] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1219] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1225] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1219] <... futex resumed>) = 0 [pid 1225] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1219] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1225] <... mprotect resumed>) = 0 [pid 1219] <... mmap resumed>) = 0x7f6f98ba9000 [pid 1225] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1219] mprotect(0x7f6f98baa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1225] <... clone resumed>, parent_tid=[1230], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1230 [pid 1219] clone(child_stack=0x7f6f98bc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1225] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1221] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1220] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1217] <... close resumed>) = 0 [pid 1215] <... futex resumed>) = 1 [pid 1211] <... futex resumed>) = 0 [pid 1225] <... futex resumed>) = 0 [pid 1219] <... clone resumed>, parent_tid=[1231], tls=0x7f6f98bc9700, child_tidptr=0x7f6f98bc99d0) = 1231 [pid 1225] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1219] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1225] <... futex resumed>) = 0 [pid 1219] <... futex resumed>) = 0 [pid 1225] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1219] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1225] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1225] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1225] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1232], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1232 [pid 1225] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1225] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1215] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1218] <... sendfile resumed>) = 1048576 [pid 1221] <... futex resumed>) = 0 [pid 1218] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1217] mkdir("./bus", 0777 [pid 1221] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1218] <... futex resumed>) = 1 [pid 1208] <... futex resumed>) = 0 [pid 1218] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1230 attached [pid 1217] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1217] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1230] set_robust_list(0x7f6fa100b9e0, 24 [pid 1213] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1213] ioctl(6, LOOP_CLR_FD) = 0 [pid 1213] close(6 [pid 1214] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1213] <... close resumed>) = 0 [pid 1214] ioctl(7, LOOP_CLR_FD) = 0 [pid 1214] close(7) = 0 [pid 1214] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1213] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1214] <... futex resumed>) = 0 [pid 1214] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1230] <... set_robust_list resumed>) = 0 [pid 1230] memfd_create("syzkaller", 0 [pid 1213] <... futex resumed>) = 0 [pid 1211] exit_group(0 [pid 1209] exit_group(0 [pid 1216] <... futex resumed>) = ? [pid 1215] <... futex resumed>) = ? [pid 1211] <... exit_group resumed>) = ? [pid 1209] <... exit_group resumed>) = ? [pid 1216] +++ exited with 0 +++ [pid 1215] +++ exited with 0 +++ [pid 1214] <... futex resumed>) = ? [ 26.491631][ T1226] EXT4-fs warning (device loop1): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 26.503648][ T1214] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.509444][ T1210] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.521839][ T1213] EXT4-fs (loop1): get root inode failed [ 26.529981][ T1213] EXT4-fs (loop1): mount failed [pid 1214] +++ exited with 0 +++ [pid 1209] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1209, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 1230] <... memfd_create resumed>) = 3 [pid 1230] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 409] <... restart_syscall resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1233 [pid 1230] <... mmap resumed>) = 0x7f6f98bca000 [pid 1230] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1220] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1231 attached [pid 1220] munmap(0x7f6f98bca000, 1048576 [pid 1217] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1217] ioctl(5, LOOP_CLR_FD [pid 1231] set_robust_list(0x7f6f98bc99e0, 24) = 0 [pid 1217] <... ioctl resumed>) = 0 [pid 1220] <... munmap resumed>) = 0 [pid 1217] close(5./strace-static-x86_64: Process 1232 attached [pid 1231] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1220] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1217] <... close resumed>) = 0 [pid 1231] <... mount resumed>) = 0 [pid 1217] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1231] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1217] <... futex resumed>) = 0 [pid 1220] <... openat resumed>) = 5 [pid 1217] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1219] <... futex resumed>) = 0 [pid 1219] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1221] <... futex resumed>) = 0 [pid 1219] <... futex resumed>) = 1 [pid 1221] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1219] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1208] exit_group(0 [pid 1218] <... futex resumed>) = ? [pid 1208] <... exit_group resumed>) = ? [pid 1221] <... open resumed>) = 6 [pid 1218] +++ exited with 0 +++ [pid 1221] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1217] <... futex resumed>) = ? [pid 1221] <... futex resumed>) = 1 [pid 1219] <... futex resumed>) = 0 [pid 1221] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1219] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1221] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1219] <... futex resumed>) = 0 [pid 1221] openat(-1, "/proc/self/exe", O_RDONLY [pid 1219] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1221] <... openat resumed>) = 7 [pid 1221] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1219] <... futex resumed>) = 0 [pid 1221] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1219] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1217] +++ exited with 0 +++ [pid 1208] +++ exited with 0 +++ [pid 1221] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1219] <... futex resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1208, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1221] sendfile(6, 7, NULL, 140737974943952 [pid 1219] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1221] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1221] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1219] <... futex resumed>) = 0 [pid 1221] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1231] <... futex resumed>) = 1 [pid 1220] ioctl(5, LOOP_SET_FD, 3 [pid 1232] set_robust_list(0x7f6fa0fea9e0, 24 [pid 407] <... restart_syscall resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 1231] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 1230] <... write resumed>) = 1048576 [pid 1230] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1230] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 1230] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1230] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 1233 attached [pid 1233] set_robust_list(0x5555564066e0, 24) = 0 [pid 1233] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1233] setpgid(0, 0 [pid 1230] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1230] close(4) = 0 [pid 1230] close(3) = 0 [pid 1230] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1230] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1233] <... setpgid resumed>) = 0 [pid 1233] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1233] write(3, "1000", 4) = 4 [pid 1233] close(3) = 0 [pid 1233] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] close(3 [pid 1233] <... futex resumed>) = 0 [pid 1233] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1233] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 407] <... close resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1234 [pid 1233] <... mprotect resumed>) = 0 [pid 1233] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1235], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1235 [pid 1233] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1233] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1233] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1232] <... set_robust_list resumed>) = 0 [pid 1233] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1233] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1233] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1232] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1233] <... clone resumed>, parent_tid=[1236], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1236 [pid 1233] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1233] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1235 attached [pid 1235] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1235] memfd_create("syzkaller", 0) = 3 [pid 1235] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1210] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1210] ioctl(7, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 1234 attached [pid 1210] close(7) = 0 [pid 1234] set_robust_list(0x5555564066e0, 24 [pid 1210] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] <... set_robust_list resumed>) = 0 [pid 1210] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1236 attached [pid 1210] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1234] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1236] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1206] exit_group(0 [pid 1234] <... prctl resumed>) = 0 [pid 1236] <... set_robust_list resumed>) = 0 [pid 1212] <... futex resumed>) = ? [pid 1206] <... exit_group resumed>) = ? [pid 1236] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1234] setpgid(0, 0 [pid 1212] +++ exited with 0 +++ [pid 1232] <... open resumed>) = 3 [pid 1210] <... futex resumed>) = ? [pid 1220] <... ioctl resumed>) = 0 [pid 1232] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1225] <... futex resumed>) = 0 [pid 1232] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1225] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] <... setpgid resumed>) = 0 [pid 1230] <... futex resumed>) = 0 [pid 1225] <... futex resumed>) = 1 [pid 1230] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1225] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1230] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1230] <... futex resumed>) = 1 [pid 1225] <... futex resumed>) = 0 [pid 1225] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1230] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1225] <... futex resumed>) = 0 [pid 1225] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1230] <... open resumed>) = 4 [pid 1230] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] <... openat resumed>) = 3 [pid 1230] <... futex resumed>) = 1 [pid 1225] <... futex resumed>) = 0 [pid 1234] write(3, "1000", 4 [pid 1230] openat(-1, "/proc/self/exe", O_RDONLY [pid 1225] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] <... write resumed>) = 4 [pid 1230] <... openat resumed>) = 5 [pid 1225] <... futex resumed>) = 0 [pid 1234] close(3 [pid 1230] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1225] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1230] <... futex resumed>) = 0 [pid 1225] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1234] <... close resumed>) = 0 [pid 1225] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1230] sendfile(4, 5, NULL, 140737974943952 [pid 1225] <... futex resumed>) = 0 [pid 1234] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1225] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1236] <... open resumed>) = 4 [pid 1235] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1234] <... futex resumed>) = 0 [pid 1220] close(3 [pid 1236] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1236] <... futex resumed>) = 1 [pid 1234] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1233] <... futex resumed>) = 0 [pid 1236] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1234] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1236] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1234] <... mprotect resumed>) = 0 [pid 1233] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1236] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1234] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1233] <... futex resumed>) = 0 [pid 1236] <... mount resumed>) = 0 [pid 1233] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1230] <... sendfile resumed>) = 1048576 [pid 1236] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] <... clone resumed>, parent_tid=[1237], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1237 [pid 1233] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1230] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1236] <... futex resumed>) = 0 [pid 1234] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1233] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1230] <... futex resumed>) = 1 [pid 1225] <... futex resumed>) = 0 [pid 1236] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1234] <... futex resumed>) = 0 [pid 1233] <... futex resumed>) = 0 [pid 1230] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1225] exit_group(0 [pid 1236] <... open resumed>) = 5 [pid 1234] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1233] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1232] <... futex resumed>) = ? [pid 1230] <... futex resumed>) = ? [pid 1225] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1237 attached [pid 1236] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1235] <... write resumed>) = 1048576 [pid 1234] <... futex resumed>) = 0 [pid 1233] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1232] +++ exited with 0 +++ [pid 1230] +++ exited with 0 +++ [pid 1225] +++ exited with 0 +++ [pid 1220] <... close resumed>) = 0 [pid 1233] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1220] mkdir("./bus", 0777 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1225, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1233] <... futex resumed>) = 0 [pid 1220] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1233] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1220] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1235] munmap(0x7f6f98bca000, 1048576 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1238 [pid 1235] <... munmap resumed>) = 0 [pid 1235] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 6 [pid 1235] ioctl(6, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1235] ioctl(6, LOOP_CLR_FD) = 0 [pid 1237] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1237] memfd_create("syzkaller", 0) = 3 [pid 1237] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 1235] ioctl(6, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1235] close(6) = 0 [pid 1235] close(3 [pid 1213] +++ exited with 0 +++ [pid 1211] +++ exited with 0 +++ [pid 1236] <... futex resumed>) = 1 [ 26.539570][ T1217] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [ 26.554892][ T1220] loop5: detected capacity change from 0 to 2048 [pid 1234] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1233] <... futex resumed>) = 0 [pid 1233] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=41000000} [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1211, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1234] <... mmap resumed>) = 0x7f6f98bca000 [pid 1236] openat(-1, "/proc/self/exe", O_RDONLY [pid 408] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 1238 attached [pid 1236] <... openat resumed>) = 3 [pid 1234] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1236] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] <... mprotect resumed>) = 0 [pid 408] <... restart_syscall resumed>) = 0 [pid 1236] <... futex resumed>) = 1 [pid 1233] <... futex resumed>) = 0 [pid 1236] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1234] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1238] set_robust_list(0x5555564066e0, 24 [pid 1233] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1238] <... set_robust_list resumed>) = 0 [pid 1236] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1235] <... close resumed>) = 0 [pid 1233] <... futex resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 1238] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1236] sendfile(5, 3, NULL, 140737974943952 [pid 1235] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] <... clone resumed>, parent_tid=[1241], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1241 [pid 1233] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1238] <... prctl resumed>) = 0 [pid 1235] <... futex resumed>) = 0 [pid 1234] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1238] setpgid(0, 0 [pid 1235] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1234] <... futex resumed>) = 0 [pid 1238] <... setpgid resumed>) = 0 [pid 1234] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1238] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1238] write(3, "1000", 4) = 4 [pid 1238] close(3) = 0 [pid 1238] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1238] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0./strace-static-x86_64: Process 1241 attached [pid 1237] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1210] +++ exited with 0 +++ [pid 1206] +++ exited with 0 +++ [pid 408] ioctl(3, LOOP_CLR_FD [pid 1241] set_robust_list(0x7f6f98bea9e0, 24 [pid 1238] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1237] <... write resumed>) = 1048576 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1206, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1241] <... set_robust_list resumed>) = 0 [pid 1237] munmap(0x7f6f98beb000, 1048576 [pid 408] close(3 [pid 1241] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 408] <... close resumed>) = 0 [pid 1237] <... munmap resumed>) = 0 [pid 1237] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1241] <... open resumed>) = 4 [pid 1237] <... openat resumed>) = 5 [pid 1237] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1237] ioctl(5, LOOP_CLR_FD [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1241] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1237] <... ioctl resumed>) = 0 [pid 1238] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1238] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1241] <... futex resumed>) = 1 [pid 1234] <... futex resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 1241] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1238] <... clone resumed>, parent_tid=[1243], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1243 [pid 1236] <... sendfile resumed>) = 1048576 [pid 1234] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] ioctl(3, LOOP_CLR_FD [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1242 [pid 1241] <... mount resumed>) = 0 [pid 1238] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1237] ioctl(5, LOOP_SET_FD, 3 [pid 1236] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1234] <... futex resumed>) = 0 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1241] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1238] <... futex resumed>) = 0 [pid 1237] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1234] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] close(3 [pid 1236] <... futex resumed>) = 1 [pid 1233] <... futex resumed>) = 0 [pid 1241] <... futex resumed>) = 0 [pid 1238] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1237] close(5 [pid 1236] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1234] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1233] exit_group(0 [pid 410] <... close resumed>) = 0 [pid 1241] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1238] <... futex resumed>) = 0 [pid 1237] <... close resumed>) = 0 [pid 1236] <... futex resumed>) = ? [pid 1235] <... futex resumed>) = ? [pid 1234] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1233] <... exit_group resumed>) = ? [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1241] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1238] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1237] close(3 [pid 1236] +++ exited with 0 +++ [pid 1235] +++ exited with 0 +++ [pid 1234] <... futex resumed>) = 0 [pid 1241] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1238] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1237] <... close resumed>) = 0 [pid 1234] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1238] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1237] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1241] <... open resumed>) = 3 [pid 1238] <... mprotect resumed>) = 0 [pid 1237] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1244 [pid 1241] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1238] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1237] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1241] <... futex resumed>) = 1 [pid 1234] <... futex resumed>) = 0 [pid 1241] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1238] <... clone resumed>, parent_tid=[1245], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1245 [pid 1234] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1238] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1237] <... futex resumed>) = 0 [pid 1234] <... futex resumed>) = 1 [pid 1238] <... futex resumed>) = 0 [pid 1237] openat(-1, "/proc/self/exe", O_RDONLY [pid 1234] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1238] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1237] <... openat resumed>) = 5 [pid 1237] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1234] <... futex resumed>) = 0 [pid 1237] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1234] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1237] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1234] <... futex resumed>) = 0 [pid 1237] sendfile(3, 5, NULL, 140737974943952 [pid 1234] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1245 attached ./strace-static-x86_64: Process 1244 attached ./strace-static-x86_64: Process 1243 attached ./strace-static-x86_64: Process 1242 attached [pid 1220] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1245] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1244] set_robust_list(0x5555564066e0, 24 [pid 1243] set_robust_list(0x7f6fa100b9e0, 24 [pid 1242] set_robust_list(0x5555564066e0, 24 [pid 1220] ioctl(5, LOOP_CLR_FD [pid 1245] <... set_robust_list resumed>) = 0 [pid 1244] <... set_robust_list resumed>) = 0 [pid 1243] <... set_robust_list resumed>) = 0 [pid 1242] <... set_robust_list resumed>) = 0 [pid 1220] <... ioctl resumed>) = 0 [pid 1245] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1244] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1237] <... sendfile resumed>) = 1048576 [pid 1237] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1234] <... futex resumed>) = 0 [pid 1237] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1234] exit_group(0 [pid 1241] <... futex resumed>) = ? [pid 1237] <... futex resumed>) = ? [pid 1234] <... exit_group resumed>) = ? [pid 1245] <... open resumed>) = 3 [pid 1244] <... prctl resumed>) = 0 [pid 1243] memfd_create("syzkaller", 0 [pid 1242] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1241] +++ exited with 0 +++ [pid 1237] +++ exited with 0 +++ [pid 1220] close(5 [pid 1245] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1244] setpgid(0, 0) = 0 [pid 1242] <... prctl resumed>) = 0 [pid 1220] <... close resumed>) = 0 [pid 1220] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] setpgid(0, 0 [pid 1244] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1220] <... futex resumed>) = 0 [pid 1242] <... setpgid resumed>) = 0 [pid 1243] <... memfd_create resumed>) = 4 [pid 1220] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1243] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1242] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1244] <... openat resumed>) = 3 [pid 1243] <... mmap resumed>) = 0x7f6f98bca000 [pid 1245] <... futex resumed>) = 1 [pid 1244] write(3, "1000", 4 [pid 1242] <... openat resumed>) = 3 [pid 1238] <... futex resumed>) = 0 [pid 1245] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1244] <... write resumed>) = 4 [pid 1242] write(3, "1000", 4 [pid 1238] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1245] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1244] close(3 [pid 1242] <... write resumed>) = 4 [pid 1238] <... futex resumed>) = 0 [pid 1219] exit_group(0 [pid 1245] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1244] <... close resumed>) = 0 [pid 1242] close(3 [pid 1238] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1231] <... futex resumed>) = ? [pid 1221] <... futex resumed>) = ? [pid 1220] <... futex resumed>) = ? [pid 1219] <... exit_group resumed>) = ? [pid 1245] <... mount resumed>) = 0 [pid 1244] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] <... close resumed>) = 0 [pid 1231] +++ exited with 0 +++ [pid 1221] +++ exited with 0 +++ [pid 1245] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1244] <... futex resumed>) = 0 [pid 1242] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1245] <... futex resumed>) = 1 [pid 1244] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1242] <... futex resumed>) = 0 [pid 1238] <... futex resumed>) = 0 [pid 1245] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1244] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1242] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1238] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1245] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1244] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1243] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1242] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1238] <... futex resumed>) = 0 [pid 1245] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1244] <... mprotect resumed>) = 0 [pid 1242] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1238] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1244] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1242] <... mprotect resumed>) = 0 [pid 1242] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1244] <... clone resumed>, parent_tid=[1246], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1246 [pid 1244] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] <... clone resumed>, parent_tid=[1247], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1247 [pid 1244] <... futex resumed>) = 0 [pid 1242] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1244] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1247 attached ./strace-static-x86_64: Process 1246 attached [pid 1244] <... futex resumed>) = 0 [pid 1243] <... write resumed>) = 1048576 [pid 1242] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1247] set_robust_list(0x7f6fa100b9e0, 24 [pid 1246] set_robust_list(0x7f6fa100b9e0, 24 [pid 1244] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1243] munmap(0x7f6f98bca000, 1048576 [pid 1242] <... futex resumed>) = 0 [pid 1247] <... set_robust_list resumed>) = 0 [pid 1246] <... set_robust_list resumed>) = 0 [pid 1244] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1243] <... munmap resumed>) = 0 [pid 1242] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1247] memfd_create("syzkaller", 0 [pid 1246] memfd_create("syzkaller", 0 [pid 1244] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1243] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1242] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1247] <... memfd_create resumed>) = 3 [pid 1246] <... memfd_create resumed>) = 3 [pid 1244] <... mprotect resumed>) = 0 [pid 1242] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1247] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1246] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1244] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1247] <... mmap resumed>) = 0x7f6f98bca000 [pid 1246] <... mmap resumed>) = 0x7f6f98bca000 [pid 1242] <... mprotect resumed>) = 0 [pid 1244] <... clone resumed>, parent_tid=[1248], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1248 [pid 1242] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1244] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1249 attached ./strace-static-x86_64: Process 1248 attached ) = 0 [pid 1242] <... clone resumed>, parent_tid=[1249], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1249 [pid 1247] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1246] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1234] +++ exited with 0 +++ [pid 1243] <... openat resumed>) = 6 [pid 1233] +++ exited with 0 +++ [pid 1245] <... open resumed>) = 5 [pid 1249] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1248] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1247] <... write resumed>) = 1048576 [ 26.590467][ T1220] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1246] <... write resumed>) = 1048576 [pid 1244] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1242] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1249] <... set_robust_list resumed>) = 0 [pid 1248] <... set_robust_list resumed>) = 0 [pid 1247] munmap(0x7f6f98bca000, 1048576 [pid 1246] munmap(0x7f6f98bca000, 1048576 [pid 1245] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1243] ioctl(6, LOOP_SET_FD, 4 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1233, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1234, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1249] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1248] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1247] <... munmap resumed>) = 0 [pid 1246] <... munmap resumed>) = 0 [pid 1242] <... futex resumed>) = 0 [pid 1247] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1246] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1245] <... futex resumed>) = 1 [pid 1247] <... openat resumed>) = 5 [pid 1246] <... openat resumed>) = 5 [pid 1247] ioctl(5, LOOP_SET_FD, 3 [pid 1246] ioctl(5, LOOP_SET_FD, 3 [pid 1249] <... open resumed>) = 4 [pid 1248] <... open resumed>) = 4 [pid 1245] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1243] <... ioctl resumed>) = 0 [pid 1242] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1238] <... futex resumed>) = 0 [pid 1220] +++ exited with 0 +++ [pid 1219] +++ exited with 0 +++ [pid 1243] close(4 [pid 1238] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1219, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1245] <... futex resumed>) = 0 [pid 1243] <... close resumed>) = 0 [pid 1238] <... futex resumed>) = 1 [pid 1245] openat(-1, "/proc/self/exe", O_RDONLY [pid 1243] mkdir("./bus", 0777 [pid 1238] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1245] <... openat resumed>) = 4 [pid 1243] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1245] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1243] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 412] <... openat resumed>) = 3 [pid 1245] <... futex resumed>) = 1 [pid 1238] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1245] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1238] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1245] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1238] <... futex resumed>) = 0 [pid 412] close(3 [pid 409] <... openat resumed>) = 3 [pid 407] <... openat resumed>) = 3 [pid 1245] sendfile(5, 4, NULL, 140737974943952 [pid 1238] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... close resumed>) = 0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 407] ioctl(3, LOOP_CLR_FD [pid 1249] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1248] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1247] <... ioctl resumed>) = 0 [pid 1246] <... ioctl resumed>) = 0 [pid 1249] <... futex resumed>) = 1 [pid 1248] <... futex resumed>) = 1 [pid 1249] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1248] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1247] close(3 [pid 1246] close(3 [pid 1247] <... close resumed>) = 0 [pid 1246] <... close resumed>) = 0 [pid 1247] mkdir("./bus", 0777 [pid 1246] mkdir("./bus", 0777 [pid 1247] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1246] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1247] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1246] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1242] <... futex resumed>) = 0 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 407] <... ioctl resumed>) = 0 [pid 1244] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1250 attached [pid 1245] <... sendfile resumed>) = 1048576 [pid 1244] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] close(3 [pid 407] close(3 [pid 1250] set_robust_list(0x5555564066e0, 24 [pid 1249] <... futex resumed>) = 0 [pid 1248] <... futex resumed>) = 0 [pid 1245] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1244] <... futex resumed>) = 1 [pid 1242] <... futex resumed>) = 1 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1250 [pid 409] <... close resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1250] <... set_robust_list resumed>) = 0 [pid 1249] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1248] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1245] <... futex resumed>) = 1 [pid 1244] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1242] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1238] <... futex resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1250] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1249] <... mount resumed>) = 0 [pid 1248] <... mount resumed>) = 0 [pid 1245] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1250] <... prctl resumed>) = 0 [pid 1249] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1248] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1251 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1252 [pid 1250] setpgid(0, 0) = 0 [pid 1250] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1250] write(3, "1000", 4) = 4 [pid 1250] close(3) = 0 [pid 1250] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1250] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1248] <... futex resumed>) = 1 [pid 1244] <... futex resumed>) = 0 [pid 1249] <... futex resumed>) = 1 [pid 1242] <... futex resumed>) = 0 [pid 1250] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1243] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1250] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1250] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1255], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1255 [pid 1250] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1250] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1250] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1250] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1249] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1248] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1244] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1243] ioctl(6, LOOP_CLR_FD [pid 1250] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1249] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1248] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1244] <... futex resumed>) = 0 [pid 1242] <... futex resumed>) = 0 [pid 1249] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1248] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1244] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1243] <... ioctl resumed>) = 0 [pid 1242] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1250] <... clone resumed>, parent_tid=[1257], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1257 [pid 1249] <... open resumed>) = 3 [pid 1250] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1249] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1248] <... open resumed>) = 3 [pid 1243] close(6 [pid 1250] <... futex resumed>) = 0 [pid 1249] <... futex resumed>) = 1 [pid 1248] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1243] <... close resumed>) = 0 [pid 1242] <... futex resumed>) = 0 [pid 1250] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1249] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1248] <... futex resumed>) = 1 [pid 1244] <... futex resumed>) = 0 [pid 1243] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1238] exit_group(0./strace-static-x86_64: Process 1252 attached [pid 1249] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1248] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1245] <... futex resumed>) = ? [pid 1244] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1243] <... futex resumed>) = ? [pid 1242] <... futex resumed>) = 0 [pid 1238] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1257 attached ./strace-static-x86_64: Process 1255 attached [pid 1252] set_robust_list(0x5555564066e0, 24 [pid 1249] openat(-1, "/proc/self/exe", O_RDONLY [pid 1248] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1245] +++ exited with 0 +++ [pid 1244] <... futex resumed>) = 0 [pid 1243] +++ exited with 0 +++ [pid 1242] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1251 attached [pid 1257] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1255] set_robust_list(0x7f6fa100b9e0, 24 [pid 1252] <... set_robust_list resumed>) = 0 [pid 1249] <... openat resumed>) = 6 [pid 1248] openat(-1, "/proc/self/exe", O_RDONLY [pid 1244] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1255] <... set_robust_list resumed>) = 0 [pid 1252] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1255] memfd_create("syzkaller", 0 [pid 1252] <... prctl resumed>) = 0 [ 26.652606][ T1243] loop4: detected capacity change from 0 to 2048 [ 26.653234][ T1247] loop1: detected capacity change from 0 to 2048 [ 26.666798][ T1246] loop3: detected capacity change from 0 to 2048 [ 26.674895][ T1243] EXT4-fs (loop4): VFS: Can't find ext4 filesystem [pid 1255] <... memfd_create resumed>) = 3 [pid 1252] setpgid(0, 0 [pid 1255] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1252] <... setpgid resumed>) = 0 [pid 1255] <... mmap resumed>) = 0x7f6f98bca000 [pid 1252] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1252] write(3, "1000", 4) = 4 [pid 1252] close(3) = 0 [pid 1252] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1252] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1252] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1252] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1259], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1259 [pid 1252] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1252] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1252] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1255] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1252] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1252] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1252] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1260], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1260 [pid 1252] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1252] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1249] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1248] <... openat resumed>) = 6 [pid 1249] <... futex resumed>) = 1 [pid 1248] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] <... futex resumed>) = 0 [pid 1255] <... write resumed>) = 1048576 [pid 1255] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1255] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [pid 1255] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 1260 attached ./strace-static-x86_64: Process 1259 attached [pid 1257] <... set_robust_list resumed>) = 0 [pid 1251] set_robust_list(0x5555564066e0, 24 [pid 1249] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1248] <... futex resumed>) = 1 [pid 1244] <... futex resumed>) = 0 [pid 1242] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1260] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1259] set_robust_list(0x7f6fa100b9e0, 24 [pid 1257] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1251] <... set_robust_list resumed>) = 0 [pid 1249] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1248] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1244] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1242] <... futex resumed>) = 0 [pid 1260] <... set_robust_list resumed>) = 0 [pid 1259] <... set_robust_list resumed>) = 0 [pid 1260] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1257] <... open resumed>) = 5 [pid 1251] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1249] sendfile(3, 6, NULL, 140737974943952 [pid 1248] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1244] <... futex resumed>) = 0 [pid 1242] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1259] memfd_create("syzkaller", 0 [pid 1257] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1251] <... prctl resumed>) = 0 [pid 1255] <... ioctl resumed>) = 0 [pid 1255] close(3 [pid 1257] <... futex resumed>) = 1 [pid 1248] sendfile(3, 6, NULL, 140737974943952 [pid 1250] <... futex resumed>) = 0 [pid 1244] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1255] <... close resumed>) = 0 [pid 1250] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1255] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1250] <... futex resumed>) = 0 [pid 1257] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1250] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1257] <... mount resumed>) = 0 [pid 1255] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1257] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1250] <... futex resumed>) = 0 [pid 1257] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1250] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1257] <... open resumed>) = 3 [pid 1250] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1257] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1250] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1257] <... futex resumed>) = 0 [pid 1250] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1257] openat(-1, "/proc/self/exe", O_RDONLY [pid 1251] setpgid(0, 0 [pid 1250] <... futex resumed>) = 0 [pid 1257] <... openat resumed>) = 6 [pid 1250] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1257] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1251] <... setpgid resumed>) = 0 [pid 1257] <... futex resumed>) = 1 [pid 1251] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1250] <... futex resumed>) = 0 [pid 1257] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1250] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1257] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1250] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1257] sendfile(3, 6, NULL, 140737974943952 [pid 1251] <... openat resumed>) = 3 [pid 1238] +++ exited with 0 +++ [pid 1251] write(3, "1000", 4 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1238, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1251] <... write resumed>) = 4 [pid 1251] close(3) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1251] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1251] <... futex resumed>) = 0 [pid 411] <... ioctl resumed>) = 0 [pid 1251] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 411] close(3) = 0 [pid 1251] <... mmap resumed>) = 0x7f6fa0feb000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1251] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1261 [pid 1251] <... mprotect resumed>) = 0 [pid 1251] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1262], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1262 [pid 1251] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1251] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1251] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1251] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1251] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1263], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1263 [pid 1251] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1251] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1247] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1247] ioctl(5, LOOP_CLR_FD./strace-static-x86_64: Process 1263 attached [pid 1263] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1248] <... sendfile resumed>) = 1048576 [pid 1248] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1244] <... futex resumed>) = 0 [pid 1246] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1246] ioctl(5, LOOP_CLR_FD [pid 1248] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1246] <... ioctl resumed>) = 0 [pid 1249] <... sendfile resumed>) = 1048576 [pid 1249] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1242] <... futex resumed>) = 0 [pid 1249] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1246] close(5) = 0 [pid 1246] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1246] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1263] <... set_robust_list resumed>) = 0 [pid 1244] exit_group(0 [pid 1248] <... futex resumed>) = ? [pid 1246] <... futex resumed>) = ? [pid 1244] <... exit_group resumed>) = ? [pid 1248] +++ exited with 0 +++ [pid 1246] +++ exited with 0 +++ [pid 1244] +++ exited with 0 +++ [pid 1257] <... sendfile resumed>) = 1048576 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1244, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 1260] <... open resumed>) = 3 [pid 1259] <... memfd_create resumed>) = 4 [pid 1257] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1263] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 410] <... restart_syscall resumed>) = 0 [ 26.702844][ T1246] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.713530][ T1247] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.718273][ T1255] loop5: detected capacity change from 0 to 2048 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = 0 [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1263] <... open resumed>) = 3 [pid 1263] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1264 [pid 1263] <... futex resumed>) = 1 [pid 1251] <... futex resumed>) = 0 [pid 1263] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1251] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1263] <... mount resumed>) = 0 [pid 1251] <... futex resumed>) = 0 [pid 1263] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1251] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1263] <... futex resumed>) = 0 [pid 1251] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1263] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1251] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1263] <... open resumed>) = 4 [pid 1251] <... futex resumed>) = 0 [pid 1263] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1251] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1263] <... futex resumed>) = 0 [pid 1251] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1263] openat(-1, "/proc/self/exe", O_RDONLY [pid 1251] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1263] <... openat resumed>) = 5 [pid 1251] <... futex resumed>) = 0 [pid 1263] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1251] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1263] <... futex resumed>) = 0 [pid 1251] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1263] sendfile(4, 5, NULL, 140737974943952 [pid 1251] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1264 attached [pid 1263] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1251] <... futex resumed>) = 0 [pid 1264] set_robust_list(0x5555564066e0, 24 [pid 1263] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1257] <... futex resumed>) = 1 [pid 1251] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1250] <... futex resumed>) = 0 [pid 1264] <... set_robust_list resumed>) = 0 [pid 1263] <... futex resumed>) = 0 [pid 1251] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1264] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1263] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1260] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1259] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1257] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1264] <... prctl resumed>) = 0 [pid 1260] <... futex resumed>) = 1 [pid 1259] <... mmap resumed>) = 0x7f6f98bca000 [pid 1252] <... futex resumed>) = 0 [pid 1264] setpgid(0, 0 [pid 1260] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1252] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1264] <... setpgid resumed>) = 0 [pid 1260] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1252] <... futex resumed>) = 0 [pid 1264] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1260] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1252] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1264] <... openat resumed>) = 3 [pid 1264] write(3, "1000", 4 [pid 1260] <... mount resumed>) = 0 [pid 1264] <... write resumed>) = 4 [pid 1264] close(3) = 0 [pid 1264] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1264] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1260] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1262 attached [pid 1264] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1260] <... futex resumed>) = 1 [pid 1252] <... futex resumed>) = 0 [pid 1264] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1262] set_robust_list(0x7f6fa100b9e0, 24 [pid 1260] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1252] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1264] <... mprotect resumed>) = 0 [pid 1262] <... set_robust_list resumed>) = 0 [pid 1260] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1252] <... futex resumed>) = 0 [pid 1264] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1262] memfd_create("syzkaller", 0 [pid 1260] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1252] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1260] <... open resumed>) = 5 [pid 1262] <... memfd_create resumed>) = 6 [pid 1260] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1261 attached [pid 1264] <... clone resumed>, parent_tid=[1265], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1265 [pid 1262] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1260] <... futex resumed>) = 1 [pid 1252] <... futex resumed>) = 0 [pid 1264] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1262] <... mmap resumed>) = 0x7f6f98bca000 [pid 1261] set_robust_list(0x5555564066e0, 24 [pid 1260] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1252] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1264] <... futex resumed>) = 0 [pid 1260] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1252] <... futex resumed>) = 0 [pid 1264] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1260] openat(-1, "/proc/self/exe", O_RDONLY [pid 1252] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1264] <... futex resumed>) = 0 [pid 1261] <... set_robust_list resumed>) = 0 [pid 1260] <... openat resumed>) = 6 [pid 1264] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1261] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1260] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1264] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1261] <... prctl resumed>) = 0 [pid 1260] <... futex resumed>) = 1 [pid 1259] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1252] <... futex resumed>) = 0 [pid 1264] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1261] setpgid(0, 0 [pid 1260] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1252] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1264] <... mprotect resumed>) = 0 [pid 1261] <... setpgid resumed>) = 0 [pid 1260] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1252] <... futex resumed>) = 0 [pid 1264] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1261] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1260] sendfile(5, 6, NULL, 140737974943952 [pid 1252] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1261] <... openat resumed>) = 3 [pid 1260] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1264] <... clone resumed>, parent_tid=[1266], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1266 [pid 1261] write(3, "1000", 4 [pid 1260] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1264] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1261] <... write resumed>) = 4 [pid 1260] <... futex resumed>) = 1 [pid 1252] <... futex resumed>) = 0 [pid 1264] <... futex resumed>) = 0 [pid 1261] close(3 [pid 1260] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1264] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1261] <... close resumed>) = 0 [pid 1261] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1265 attached ) = 0 [pid 1265] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1265] memfd_create("syzkaller", 0) = 3 [pid 1265] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1261] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1265] <... mmap resumed>) = 0x7f6f98bca000 [pid 1261] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1261] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1262] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1247] <... ioctl resumed>) = 0 [pid 1261] <... mprotect resumed>) = 0 [pid 1259] <... write resumed>) = 1048576 [pid 1247] close(5 [pid 1261] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1259] munmap(0x7f6f98bca000, 1048576 [pid 1247] <... close resumed>) = 0 ./strace-static-x86_64: Process 1266 attached [pid 1259] <... munmap resumed>) = 0 [pid 1247] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1266] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1261] <... clone resumed>, parent_tid=[1267], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1267 [pid 1259] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1247] <... futex resumed>) = 0 [pid 1266] <... set_robust_list resumed>) = 0 [pid 1261] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1247] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1266] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1266] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1265] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1264] <... futex resumed>) = 0 [pid 1242] exit_group(0 [pid 1266] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1264] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1261] <... futex resumed>) = 0 [pid 1259] <... openat resumed>) = 7 [pid 1255] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1249] <... futex resumed>) = ? [pid 1247] <... futex resumed>) = ? [pid 1242] <... exit_group resumed>) = ? [pid 1266] <... mount resumed>) = 0 [pid 1264] <... futex resumed>) = 0 [pid 1261] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1259] ioctl(7, LOOP_SET_FD, 4 [pid 1255] ioctl(4, LOOP_CLR_FD [pid 1249] +++ exited with 0 +++ [pid 1247] +++ exited with 0 +++ [pid 1266] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1264] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1261] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1267 attached [pid 1266] <... futex resumed>) = 0 [pid 1265] <... write resumed>) = 1048576 [pid 1264] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1267] set_robust_list(0x7f6fa100b9e0, 24 [pid 1266] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1264] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1267] <... set_robust_list resumed>) = 0 [pid 1266] <... open resumed>) = 5 [pid 1264] <... futex resumed>) = 0 [pid 1267] memfd_create("syzkaller", 0 [pid 1266] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1264] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1267] <... memfd_create resumed>) = 3 [pid 1266] <... futex resumed>) = 0 [pid 1264] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1267] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1266] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1264] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1267] <... mmap resumed>) = 0x7f6f98beb000 [pid 1266] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1264] <... futex resumed>) = 0 [pid 1266] openat(-1, "/proc/self/exe", O_RDONLY [pid 1264] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1266] <... openat resumed>) = 6 [pid 1265] munmap(0x7f6f98bca000, 1048576 [pid 1262] <... write resumed>) = 1048576 [pid 1261] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1259] <... ioctl resumed>) = 0 [pid 1255] <... ioctl resumed>) = 0 [pid 1266] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1265] <... munmap resumed>) = 0 [pid 1262] munmap(0x7f6f98bca000, 1048576 [pid 1261] <... mmap resumed>) = 0x7f6f98bca000 [pid 1259] close(4 [pid 1255] close(4 [pid 1266] <... futex resumed>) = 1 [pid 1265] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1264] <... futex resumed>) = 0 [pid 1262] <... munmap resumed>) = 0 [pid 1261] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1259] <... close resumed>) = 0 [pid 1255] <... close resumed>) = 0 [pid 1266] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1265] <... openat resumed>) = 7 [pid 1264] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1262] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1261] <... mprotect resumed>) = 0 [pid 1265] ioctl(7, LOOP_SET_FD, 3 [pid 1262] <... openat resumed>) = 7 [pid 1261] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1259] mkdir("./bus", 0777 [pid 1266] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1265] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1264] <... futex resumed>) = 0 [pid 1262] ioctl(7, LOOP_SET_FD, 6 [pid 1259] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1255] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1268 attached [pid 1267] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1266] sendfile(5, 6, NULL, 140737974943952 [pid 1264] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1255] <... futex resumed>) = 0 [pid 1268] set_robust_list(0x7f6f98bea9e0, 24 [pid 1267] <... write resumed>) = 1048576 [pid 1265] ioctl(7, LOOP_CLR_FD [pid 1262] <... ioctl resumed>) = 0 [pid 1261] <... clone resumed>, parent_tid=[1268], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1268 [pid 1259] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1265] <... ioctl resumed>) = 0 [pid 1262] close(6 [pid 1261] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1255] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1250] exit_group(0 [pid 1262] <... close resumed>) = 0 [pid 1261] <... futex resumed>) = 0 [pid 1257] <... futex resumed>) = ? [pid 1250] <... exit_group resumed>) = ? [pid 1262] mkdir("./bus", 0777 [pid 1261] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1257] +++ exited with 0 +++ [pid 1255] <... futex resumed>) = ? [pid 1262] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1262] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1268] <... set_robust_list resumed>) = 0 [pid 1268] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1265] ioctl(7, LOOP_SET_FD, 3 [pid 1268] <... open resumed>) = 4 [pid 1265] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1255] +++ exited with 0 +++ [pid 1250] +++ exited with 0 +++ [pid 1268] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1265] close(7 [pid 1268] <... futex resumed>) = 1 [pid 1265] <... close resumed>) = 0 [pid 1261] <... futex resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1250, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1268] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1265] close(3 [pid 1261] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1267] munmap(0x7f6f98beb000, 1048576 [pid 1266] <... sendfile resumed>) = 1048576 [pid 1261] <... futex resumed>) = 0 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 1267] <... munmap resumed>) = 0 [pid 1266] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1261] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... restart_syscall resumed>) = 0 [pid 1268] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1267] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1266] <... futex resumed>) = 1 [pid 1265] <... close resumed>) = 0 [ 26.753663][ T1255] EXT4-fs (loop5): VFS: Can't find ext4 filesystem [ 26.786445][ T1259] loop0: detected capacity change from 0 to 2048 [ 26.796766][ T1262] loop2: detected capacity change from 0 to 2048 [pid 1264] <... futex resumed>) = 0 [pid 1266] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1271 ./strace-static-x86_64: Process 1271 attached [pid 1271] set_robust_list(0x5555564066e0, 24) = 0 [pid 1271] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1271] setpgid(0, 0) = 0 [pid 1271] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1271] write(3, "1000", 4) = 4 [pid 1271] close(3) = 0 [pid 1271] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1271] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1271] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1271] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1272], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1272 [pid 1271] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1271] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1271] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1271] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1271] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1273], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1273 [pid 1271] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1271] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1272 attached [pid 1272] set_robust_list(0x7f6fa100b9e0, 24 [pid 1267] <... openat resumed>) = 5 [pid 1242] +++ exited with 0 +++ [pid 1267] ioctl(5, LOOP_SET_FD, 3./strace-static-x86_64: Process 1273 attached [pid 1272] <... set_robust_list resumed>) = 0 [pid 1268] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1265] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1242, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1268] <... mount resumed>) = 0 [pid 1265] <... futex resumed>) = 0 [pid 1264] exit_group(0 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1268] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1265] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1268] <... futex resumed>) = 1 [pid 1261] <... futex resumed>) = 0 [pid 1268] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1261] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1266] <... futex resumed>) = ? [pid 1264] <... exit_group resumed>) = ? [pid 1266] +++ exited with 0 +++ [pid 408] <... restart_syscall resumed>) = 0 [pid 1265] <... futex resumed>) = ? [pid 1261] <... futex resumed>) = 0 [pid 1273] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1268] <... open resumed>) = 6 [pid 1267] <... ioctl resumed>) = 0 [pid 1265] +++ exited with 0 +++ [pid 1264] +++ exited with 0 +++ [pid 1261] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1259] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1273] <... set_robust_list resumed>) = 0 [pid 1272] memfd_create("syzkaller", 0 [pid 1268] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1267] close(3 [pid 1268] <... futex resumed>) = 1 [pid 1261] <... futex resumed>) = 0 [pid 1268] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1261] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1268] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1261] <... futex resumed>) = 0 [pid 1268] openat(-1, "/proc/self/exe", O_RDONLY [pid 1261] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1268] <... openat resumed>) = 7 [pid 1268] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1261] <... futex resumed>) = 0 [pid 1268] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1261] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1268] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1261] <... futex resumed>) = 0 [pid 1268] sendfile(6, 7, NULL, 140737974943952 [pid 1261] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1268] <... sendfile resumed>) = 1048576 [pid 1267] <... close resumed>) = 0 [pid 1259] ioctl(7, LOOP_CLR_FD [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1264, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1268] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1261] <... futex resumed>) = 0 [pid 1268] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] <... openat resumed>) = 3 [pid 1259] <... ioctl resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1259] close(7 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1273] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1267] mkdir("./bus", 0777 [pid 1259] <... close resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 408] close(3 [pid 1272] <... memfd_create resumed>) = 3 [pid 1273] <... open resumed>) = 4 [pid 1267] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1259] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1259] <... futex resumed>) = 0 [pid 410] <... ioctl resumed>) = 0 [pid 1267] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1272] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 408] <... close resumed>) = 0 [pid 1273] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1252] exit_group(0 [pid 1259] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 410] close(3 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] <... close resumed>) = 0 [pid 1252] <... exit_group resumed>) = ? [pid 1259] <... futex resumed>) = 230 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1260] <... futex resumed>) = ? [pid 1259] +++ exited with 0 +++ [pid 1273] <... futex resumed>) = 1 [pid 1272] <... mmap resumed>) = 0x7f6f98bca000 [pid 1271] <... futex resumed>) = 0 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1276 [pid 1273] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1271] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1273] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1271] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1277 [pid 1272] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1273] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1271] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1273] <... mount resumed>) = 0 [pid 1273] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1271] <... futex resumed>) = 0 [pid 1273] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1271] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1273] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1271] <... futex resumed>) = 0 [pid 1273] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1271] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1273] <... open resumed>) = 5 [pid 1273] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1271] <... futex resumed>) = 0 [pid 1273] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1271] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1273] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1271] <... futex resumed>) = 0 [pid 1273] openat(-1, "/proc/self/exe", O_RDONLY [pid 1271] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1273] <... openat resumed>) = 6 [pid 1273] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1271] <... futex resumed>) = 0 [pid 1273] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1271] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1273] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1271] <... futex resumed>) = 0 [pid 1273] sendfile(5, 6, NULL, 140737974943952 [pid 1271] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1262] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1262] ioctl(7, LOOP_CLR_FD) = 0 [pid 1262] close(7) = 0 [pid 1262] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1251] exit_group(0 [pid 1263] <... futex resumed>) = 230 [pid 1251] <... exit_group resumed>) = ? [pid 1263] +++ exited with 0 +++ [pid 1273] <... sendfile resumed>) = 1048576 [pid 1273] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1271] <... futex resumed>) = 0 [pid 1273] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1272] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1277 attached ./strace-static-x86_64: Process 1276 attached [pid 1267] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1277] set_robust_list(0x5555564066e0, 24 [pid 1276] set_robust_list(0x5555564066e0, 24 [pid 1272] munmap(0x7f6f98bca000, 1048576 [pid 1267] ioctl(5, LOOP_CLR_FD [pid 1277] <... set_robust_list resumed>) = 0 [pid 1276] <... set_robust_list resumed>) = 0 [pid 1272] <... munmap resumed>) = 0 [pid 1267] <... ioctl resumed>) = 0 [pid 1277] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1276] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1272] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1267] close(5 [pid 1277] <... prctl resumed>) = 0 [pid 1276] <... prctl resumed>) = 0 [pid 1272] <... openat resumed>) = 7 [pid 1267] <... close resumed>) = 0 [pid 1277] setpgid(0, 0 [pid 1276] setpgid(0, 0 [pid 1272] ioctl(7, LOOP_SET_FD, 3 [pid 1267] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1277] <... setpgid resumed>) = 0 [pid 1276] <... setpgid resumed>) = 0 [pid 1272] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1267] <... futex resumed>) = 0 [pid 1277] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1276] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1272] ioctl(7, LOOP_CLR_FD [pid 1267] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1277] <... openat resumed>) = 3 [pid 1276] <... openat resumed>) = 3 [pid 1272] <... ioctl resumed>) = 0 [pid 1277] write(3, "1000", 4 [pid 1276] write(3, "1000", 4 [pid 1277] <... write resumed>) = 4 [pid 1276] <... write resumed>) = 4 [pid 1261] exit_group(0 [pid 1277] close(3 [pid 1276] close(3 [pid 1268] <... futex resumed>) = ? [pid 1267] <... futex resumed>) = ? [pid 1261] <... exit_group resumed>) = ? [pid 1277] <... close resumed>) = 0 [pid 1276] <... close resumed>) = 0 [pid 1272] ioctl(7, LOOP_SET_FD, 3 [pid 1268] +++ exited with 0 +++ [pid 1277] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1276] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1272] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1277] <... futex resumed>) = 0 [pid 1276] <... futex resumed>) = 0 [pid 1272] close(7 [pid 1277] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1276] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1272] <... close resumed>) = 0 [pid 1277] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1276] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1272] close(3 [pid 1277] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1276] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1277] <... mprotect resumed>) = 0 [pid 1277] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1278], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1278 [pid 1277] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1277] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1278 attached ) = 0 [pid 1276] <... mprotect resumed>) = 0 [pid 1272] <... close resumed>) = 0 [pid 1278] set_robust_list(0x7f6fa100b9e0, 24 [pid 1277] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1276] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1272] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1271] exit_group(0./strace-static-x86_64: Process 1279 attached [pid 1278] <... set_robust_list resumed>) = 0 [pid 1277] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1273] <... futex resumed>) = ? [pid 1272] <... futex resumed>) = ? [pid 1271] <... exit_group resumed>) = ? [pid 1279] set_robust_list(0x7f6fa100b9e0, 24 [pid 1278] memfd_create("syzkaller", 0 [pid 1277] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1276] <... clone resumed>, parent_tid=[1279], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1279 [pid 1273] +++ exited with 0 +++ [pid 1272] +++ exited with 0 +++ [pid 1260] +++ exited with 0 +++ [pid 1252] +++ exited with 0 +++ [pid 1279] <... set_robust_list resumed>) = 0 [pid 1278] <... memfd_create resumed>) = 3 [pid 1277] <... mprotect resumed>) = 0 [pid 1276] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1279] memfd_create("syzkaller", 0 [pid 1278] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1277] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1276] <... futex resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1252, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1278] <... mmap resumed>) = 0x7f6f98bca000 [pid 1276] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1280 attached [pid 1279] <... memfd_create resumed>) = 3 [pid 1277] <... clone resumed>, parent_tid=[1280], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1280 [pid 1276] <... futex resumed>) = 0 [pid 1280] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1279] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1277] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1276] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1280] <... set_robust_list resumed>) = 0 [pid 1279] <... mmap resumed>) = 0x7f6f98beb000 [ 26.809667][ T1259] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.822552][ T1267] loop4: detected capacity change from 0 to 2048 [ 26.836567][ T1262] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 26.850850][ T1267] EXT4-fs (loop4): VFS: Can't find ext4 filesystem [pid 1277] <... futex resumed>) = 0 [pid 1276] <... mmap resumed>) = 0x7f6f98bca000 [pid 1280] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1278] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1277] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1276] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1278] <... write resumed>) = 1048576 [pid 1276] <... mprotect resumed>) = 0 [pid 1276] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1281], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1281 [pid 1276] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1276] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1278] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1278] openat(AT_FDCWD, "/dev/loop3", O_RDWR./strace-static-x86_64: Process 1281 attached [pid 1281] set_robust_list(0x7f6f98bea9e0, 24) = 0 [pid 1281] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1281] <... open resumed>) = 4 [pid 1281] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1276] <... futex resumed>) = 0 [pid 1276] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1276] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1281] <... futex resumed>) = 1 [pid 1281] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 407] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1281] <... mount resumed>) = 0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1281] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] close(3 [pid 1276] <... futex resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1276] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1276] <... futex resumed>) = 0 [pid 1276] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1281] <... futex resumed>) = 1 [pid 1281] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1281] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1276] <... futex resumed>) = 0 [pid 1276] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1276] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1281] <... futex resumed>) = 1 [pid 1281] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1281] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1276] <... futex resumed>) = 0 [pid 1276] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1276] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1281] <... futex resumed>) = 1 [pid 1281] sendfile(5, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 1281] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1276] <... futex resumed>) = 0 [pid 1281] <... futex resumed>) = 1 [pid 1281] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1282 attached [pid 1282] set_robust_list(0x5555564066e0, 24) = 0 [pid 1282] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1282] setpgid(0, 0) = 0 [pid 1282] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1282] write(3, "1000", 4) = 4 [pid 1282] close(3) = 0 [pid 1282] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1262] +++ exited with 0 +++ [pid 1251] +++ exited with 0 +++ [pid 1282] <... futex resumed>) = 0 [pid 1282] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1282] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1282] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1283], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1283 [pid 1282] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1282] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1282] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1282] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1282] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1284], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1284 [pid 1282] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1282] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1283 attached [pid 1283] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1283] memfd_create("syzkaller", 0) = 3 [pid 1283] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1283] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1283] munmap(0x7f6f98bca000, 1048576) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1282 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1251, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1283] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 409] <... openat resumed>) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3 [pid 1283] <... openat resumed>) = 4 [pid 409] <... close resumed>) = 0 [pid 1283] ioctl(4, LOOP_SET_FD, 3 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1285 attached ./strace-static-x86_64: Process 1284 attached [pid 1280] <... open resumed>) = 5 [pid 1279] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1280] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1279] <... write resumed>) = 1048576 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1285 [pid 1280] <... futex resumed>) = 1 [pid 1280] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1279] munmap(0x7f6f98beb000, 1048576) = 0 [pid 1279] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 7 [pid 1277] <... futex resumed>) = 0 [pid 1283] <... ioctl resumed>) = 0 [pid 1277] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1285] set_robust_list(0x5555564066e0, 24 [pid 1284] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1283] close(3 [pid 1280] <... futex resumed>) = 0 [pid 1277] <... futex resumed>) = 1 [pid 1284] <... set_robust_list resumed>) = 0 [pid 1283] <... close resumed>) = 0 [pid 1285] <... set_robust_list resumed>) = 0 [pid 1279] ioctl(7, LOOP_SET_FD, 3 [pid 1280] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1280] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1280] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1277] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 1277] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1280] <... futex resumed>) = 0 [pid 1277] <... futex resumed>) = 1 [pid 1280] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1277] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1285] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1284] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1283] mkdir("./bus", 0777 [pid 1271] +++ exited with 0 +++ [pid 1280] <... open resumed>) = 6 [pid 1278] <... openat resumed>) = 4 [pid 1267] +++ exited with 0 +++ [pid 1261] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1271, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1285] <... prctl resumed>) = 0 [pid 1284] <... open resumed>) = 3 [pid 1283] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1280] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1279] <... ioctl resumed>) = 0 [pid 1278] ioctl(4, LOOP_SET_FD, 3 [pid 1280] <... futex resumed>) = 1 [pid 1277] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1261, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1280] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1277] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1280] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1277] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 411] <... openat resumed>) = 3 [pid 1280] openat(-1, "/proc/self/exe", O_RDONLY [pid 1277] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] ioctl(3, LOOP_CLR_FD [pid 411] ioctl(3, LOOP_CLR_FD [pid 1280] <... openat resumed>) = 7 [pid 412] <... ioctl resumed>) = 0 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1280] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] close(3 [pid 411] close(3 [pid 1280] <... futex resumed>) = 1 [pid 1277] <... futex resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 1280] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1277] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1280] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1277] <... futex resumed>) = 0 [pid 1284] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1280] sendfile(6, 7, NULL, 140737974943952 [pid 1278] <... ioctl resumed>) = 0 [pid 1277] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1286 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1287 [pid 1284] <... futex resumed>) = 1 [pid 1282] <... futex resumed>) = 0 [pid 1278] close(3 [pid 1284] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1282] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1278] <... close resumed>) = 0 [pid 1284] <... mount resumed>) = 0 [pid 1282] <... futex resumed>) = 0 [pid 1278] mkdir("./bus", 0777./strace-static-x86_64: Process 1287 attached ./strace-static-x86_64: Process 1286 attached [pid 1284] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1282] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1278] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1287] set_robust_list(0x5555564066e0, 24 [pid 1286] set_robust_list(0x5555564066e0, 24 [pid 1284] <... futex resumed>) = 0 [pid 1282] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1278] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1287] <... set_robust_list resumed>) = 0 [pid 1284] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1282] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1280] <... sendfile resumed>) = 1048576 [pid 1285] setpgid(0, 0 [pid 1284] <... open resumed>) = 5 [pid 1283] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1280] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1285] <... setpgid resumed>) = 0 [pid 1284] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1280] <... futex resumed>) = 1 [pid 1277] <... futex resumed>) = 0 [pid 1285] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1284] <... futex resumed>) = 0 [pid 1280] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1285] <... openat resumed>) = 3 [pid 1284] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1285] write(3, "1000", 4) = 4 [pid 1285] close(3) = 0 [pid 1285] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1285] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1285] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1285] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1288], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1288 [pid 1285] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1285] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1286] <... set_robust_list resumed>) = 0 [pid 1285] <... futex resumed>) = 0 [pid 1284] <... futex resumed>) = 0 [pid 1282] <... futex resumed>) = 1 [pid 1287] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1286] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1285] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1284] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1282] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1287] <... prctl resumed>) = 0 [pid 1286] <... prctl resumed>) = 0 [pid 1285] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1282] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1287] setpgid(0, 0 [pid 1286] setpgid(0, 0 [pid 1285] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1282] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1287] <... setpgid resumed>) = 0 [pid 1286] <... setpgid resumed>) = 0 [pid 1285] <... mprotect resumed>) = 0 [pid 1284] <... futex resumed>) = 0 [pid 1282] <... futex resumed>) = 1 [pid 1286] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1287] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1285] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1284] openat(-1, "/proc/self/exe", O_RDONLY [pid 1282] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1287] <... openat resumed>) = 3 [pid 1286] <... openat resumed>) = 3 [pid 1284] <... openat resumed>) = 6 [pid 1279] close(3 [pid 1287] write(3, "1000", 4 [pid 1286] write(3, "1000", 4 [pid 1285] <... clone resumed>, parent_tid=[1289], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1289 [pid 1284] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1279] <... close resumed>) = 0 ./strace-static-x86_64: Process 1288 attached [pid 1287] <... write resumed>) = 4 [pid 1286] <... write resumed>) = 4 [pid 1285] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1284] <... futex resumed>) = 1 [pid 1282] <... futex resumed>) = 0 [pid 1279] mkdir("./bus", 0777 [pid 1288] set_robust_list(0x7f6fa100b9e0, 24 [pid 1287] close(3 [pid 1286] close(3 [pid 1285] <... futex resumed>) = 0 [pid 1284] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1282] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1279] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1288] <... set_robust_list resumed>) = 0 [pid 1287] <... close resumed>) = 0 [pid 1286] <... close resumed>) = 0 [pid 1285] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1284] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1282] <... futex resumed>) = 0 [pid 1279] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1278] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1288] memfd_create("syzkaller", 0 [pid 1287] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1286] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1284] sendfile(5, 6, NULL, 140737974943952 [pid 1282] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1278] ioctl(4, LOOP_CLR_FD [pid 1287] <... futex resumed>) = 0 [pid 1286] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1289 attached [pid 1289] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1289] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1287] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1287] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1286] <... mmap resumed>) = 0x7f6fa0feb000 [ 26.898041][ T1262] syz-executor138 (1262) used greatest stack depth: 22232 bytes left [ 26.907018][ T1283] loop0: detected capacity change from 0 to 2048 [ 26.918857][ T1279] loop1: detected capacity change from 0 to 2048 [ 26.926713][ T1278] loop3: detected capacity change from 0 to 2048 [ 26.939100][ T1278] EXT4-fs (loop3): VFS: Can't find ext4 filesystem [pid 1289] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1288] <... memfd_create resumed>) = 3 [pid 1287] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1286] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1285] <... futex resumed>) = 0 [pid 1278] <... ioctl resumed>) = 0 [pid 1289] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1288] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1287] <... mprotect resumed>) = 0 [pid 1286] <... mprotect resumed>) = 0 [pid 1285] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1278] close(4 [pid 1289] <... mount resumed>) = 0 [pid 1288] <... mmap resumed>) = 0x7f6f98bca000 [pid 1287] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1286] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1285] <... futex resumed>) = 0 [pid 1278] <... close resumed>) = 0 [pid 1289] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1285] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1289] <... futex resumed>) = 0 [pid 1285] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1289] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1285] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1289] <... open resumed>) = 5 [pid 1285] <... futex resumed>) = 0 [pid 1289] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1285] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1289] <... futex resumed>) = 0 [pid 1285] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1289] openat(-1, "/proc/self/exe", O_RDONLY [pid 1285] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1289] <... openat resumed>) = 6 [pid 1285] <... futex resumed>) = 0 [pid 1289] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1285] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1289] <... futex resumed>) = 0 [pid 1288] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1285] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1278] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1277] exit_group(0 [pid 1289] sendfile(5, 6, NULL, 140737974943952 [pid 1287] <... clone resumed>, parent_tid=[1291], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1291 [pid 1286] <... clone resumed>, parent_tid=[1290], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1290 [pid 1285] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1280] <... futex resumed>) = ? [pid 1278] <... futex resumed>) = ? [pid 1277] <... exit_group resumed>) = ? [pid 1289] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1285] <... futex resumed>) = 0 [pid 1280] +++ exited with 0 +++ [pid 1289] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1285] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1289] <... futex resumed>) = 0 [pid 1285] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1289] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1278] +++ exited with 0 +++ [pid 1286] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1277] +++ exited with 0 +++ [pid 1287] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1286] <... futex resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1277, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1287] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1286] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 1287] <... futex resumed>) = 0 [pid 1286] <... futex resumed>) = 0 [pid 410] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 1290 attached [pid 1287] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1290] set_robust_list(0x7f6fa100b9e0, 24 [pid 1287] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1286] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1290] <... set_robust_list resumed>) = 0 [pid 1287] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1286] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1290] memfd_create("syzkaller", 0 [pid 1287] <... mprotect resumed>) = 0 [pid 1286] <... mprotect resumed>) = 0 [pid 1284] <... sendfile resumed>) = 1048576 [pid 410] <... openat resumed>) = 3 [pid 1290] <... memfd_create resumed>) = 3 [pid 1287] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1286] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1284] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1290] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1284] <... futex resumed>) = 1 [pid 1282] <... futex resumed>) = 0 [pid 410] <... ioctl resumed>) = 0 [pid 1290] <... mmap resumed>) = 0x7f6f98bca000 [pid 1287] <... clone resumed>, parent_tid=[1293], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1293 [pid 1286] <... clone resumed>, parent_tid=[1294], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1294 [pid 1284] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 410] close(3 [pid 1290] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1288] <... write resumed>) = 1048576 [pid 1287] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1286] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1283] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 410] <... close resumed>) = 0 [pid 1287] <... futex resumed>) = 0 [pid 1286] <... futex resumed>) = 0 [pid 1283] ioctl(4, LOOP_CLR_FD [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1287] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1286] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1283] <... ioctl resumed>) = 0 [pid 1288] munmap(0x7f6f98bca000, 1048576 [pid 1283] close(4 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1296 ./strace-static-x86_64: Process 1294 attached [pid 1283] <... close resumed>) = 0 [pid 1294] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1283] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1294] <... set_robust_list resumed>) = 0 [pid 1283] <... futex resumed>) = 0 [pid 1282] exit_group(0./strace-static-x86_64: Process 1293 attached ./strace-static-x86_64: Process 1291 attached [pid 1294] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1288] <... munmap resumed>) = 0 [pid 1284] <... futex resumed>) = ? [pid 1282] <... exit_group resumed>) = ? [pid 1294] <... open resumed>) = 4 [pid 1293] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1291] set_robust_list(0x7f6fa100b9e0, 24 [pid 1288] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1284] +++ exited with 0 +++ [pid 1294] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1293] <... set_robust_list resumed>) = 0 [pid 1291] <... set_robust_list resumed>) = 0 [pid 1290] <... write resumed>) = 1048576 [pid 1288] <... openat resumed>) = 7 [pid 1294] <... futex resumed>) = 1 [pid 1294] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1296 attached [pid 1296] set_robust_list(0x5555564066e0, 24) = 0 [pid 1296] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1296] setpgid(0, 0) = 0 [pid 1296] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1296] write(3, "1000", 4) = 4 [pid 1296] close(3) = 0 [pid 1296] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1296] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1296] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1296] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1297], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1297 [pid 1296] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1290] munmap(0x7f6f98bca000, 1048576 [pid 1296] <... futex resumed>) = 0 [pid 1290] <... munmap resumed>) = 0 [pid 1286] <... futex resumed>) = 0 [pid 1296] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1293] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1291] memfd_create("syzkaller", 0 [pid 1290] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1288] ioctl(7, LOOP_SET_FD, 3 [pid 1286] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1296] <... futex resumed>) = 0 [pid 1294] <... futex resumed>) = 0 [pid 1290] <... openat resumed>) = 5 [pid 1286] <... futex resumed>) = 1 [pid 1296] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1294] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1290] ioctl(5, LOOP_SET_FD, 3 [pid 1296] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1294] <... mount resumed>) = 0 [pid 1290] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1296] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1294] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1290] ioctl(5, LOOP_CLR_FD [pid 1296] <... mprotect resumed>) = 0 [pid 1294] <... futex resumed>) = 0 [pid 1290] <... ioctl resumed>) = 0 [pid 1296] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1294] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1296] <... clone resumed>, parent_tid=[1298], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1298 [pid 1296] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1296] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1297 attached [pid 1293] <... open resumed>) = 3 [pid 1291] <... memfd_create resumed>) = 4 [pid 1286] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 1286] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1294] <... futex resumed>) = 0 [pid 1286] <... futex resumed>) = 1 [ 26.956210][ T1283] EXT4-fs warning (device loop0): read_mmp_block:107: Error -117 while reading MMP block 64 [ 26.990794][ T1279] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1294] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1290] ioctl(5, LOOP_SET_FD, 3 [pid 1286] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1298 attached [pid 1297] set_robust_list(0x7f6fa100b9e0, 24 [pid 1294] <... open resumed>) = 6 [pid 1293] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1291] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1290] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1288] <... ioctl resumed>) = 0 [pid 1298] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1297] <... set_robust_list resumed>) = 0 [pid 1294] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1293] <... futex resumed>) = 1 [pid 1291] <... mmap resumed>) = 0x7f6f98bca000 [pid 1290] close(5 [pid 1288] close(3 [pid 1287] <... futex resumed>) = 0 [pid 1298] <... set_robust_list resumed>) = 0 [pid 1297] memfd_create("syzkaller", 0 [pid 1294] <... futex resumed>) = 1 [pid 1293] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1290] <... close resumed>) = 0 [pid 1288] <... close resumed>) = 0 [pid 1287] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1286] <... futex resumed>) = 0 [pid 1298] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1297] <... memfd_create resumed>) = 3 [pid 1294] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1293] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1290] close(3 [pid 1288] mkdir("./bus", 0777 [pid 1287] <... futex resumed>) = 0 [pid 1286] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1279] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1298] <... open resumed>) = 4 [pid 1297] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1294] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1288] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1287] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1286] <... futex resumed>) = 0 [pid 1279] ioctl(7, LOOP_CLR_FD [pid 1298] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1297] <... mmap resumed>) = 0x7f6f98bca000 [pid 1294] openat(-1, "/proc/self/exe", O_RDONLY [pid 1288] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1286] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1279] <... ioctl resumed>) = 0 [pid 1298] <... futex resumed>) = 1 [pid 1297] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1296] <... futex resumed>) = 0 [pid 1294] <... openat resumed>) = 3 [pid 1293] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1290] <... close resumed>) = 0 [pid 1279] close(7 [pid 1298] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1296] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1294] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1293] <... mount resumed>) = 0 [pid 1290] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1298] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1296] <... futex resumed>) = 0 [pid 1294] <... futex resumed>) = 1 [pid 1293] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1290] <... futex resumed>) = 0 [pid 1286] <... futex resumed>) = 0 [pid 1298] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1296] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1294] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1293] <... futex resumed>) = 1 [pid 1290] sendfile(6, 3, NULL, 140737974943952 [pid 1287] <... futex resumed>) = 0 [pid 1286] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1279] <... close resumed>) = 0 [pid 1298] <... mount resumed>) = 0 [pid 1297] <... write resumed>) = 1048576 [pid 1293] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1291] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1287] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1286] <... futex resumed>) = 0 [pid 1279] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1293] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1290] <... sendfile resumed>) = 1048576 [pid 1287] <... futex resumed>) = 0 [pid 1286] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1293] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1290] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1287] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1286] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1290] <... futex resumed>) = 0 [pid 1286] exit_group(0 [pid 1294] <... futex resumed>) = ? [pid 1286] <... exit_group resumed>) = ? [pid 1283] +++ exited with 0 +++ [pid 1282] +++ exited with 0 +++ [pid 1294] +++ exited with 0 +++ [pid 1290] +++ exited with 0 +++ [pid 1286] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1286, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1282, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1298] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1297] munmap(0x7f6f98bca000, 1048576 [pid 1293] <... open resumed>) = 5 [pid 1279] <... futex resumed>) = 0 [pid 1276] exit_group(0 [pid 412] <... restart_syscall resumed>) = 0 [pid 407] <... restart_syscall resumed>) = 0 [pid 1293] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1287] <... futex resumed>) = 0 [pid 1293] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1287] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1293] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1287] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 407] <... openat resumed>) = 3 [pid 1293] openat(-1, "/proc/self/exe", O_RDONLY [pid 1287] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] ioctl(3, LOOP_CLR_FD [pid 407] ioctl(3, LOOP_CLR_FD [pid 1293] <... openat resumed>) = 6 [pid 412] <... ioctl resumed>) = 0 [pid 407] <... ioctl resumed>) = 0 [pid 1293] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] close(3 [pid 407] close(3 [pid 1293] <... futex resumed>) = 1 [pid 1287] <... futex resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1297] <... munmap resumed>) = 0 [pid 1293] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1287] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1298] <... futex resumed>) = 1 [pid 1297] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1296] <... futex resumed>) = 0 [pid 1287] <... futex resumed>) = 0 [pid 1281] <... futex resumed>) = ? [pid 1276] <... exit_group resumed>) = ? [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1281] +++ exited with 0 +++ ./strace-static-x86_64: Process 1302 attached ./strace-static-x86_64: Process 1301 attached [pid 1298] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1297] <... openat resumed>) = 5 [pid 1296] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1293] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1291] <... write resumed>) = 1048576 [pid 1287] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1279] +++ exited with 0 +++ [pid 1298] <... open resumed>) = 6 [pid 1297] ioctl(5, LOOP_SET_FD, 3 [pid 1296] <... futex resumed>) = 0 [pid 1293] sendfile(5, 6, NULL, 140737974943952 [pid 1291] munmap(0x7f6f98bca000, 1048576 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1302 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1301 [pid 1298] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1301] set_robust_list(0x5555564066e0, 24) = 0 [pid 1301] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1301] setpgid(0, 0) = 0 [pid 1301] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1301] write(3, "1000", 4) = 4 [pid 1301] close(3) = 0 [pid 1301] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1301] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1301] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1301] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1303], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1303 [pid 1301] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1301] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1301] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1301] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1301] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1304], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1304 [pid 1301] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1301] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1304 attached [pid 1304] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1304] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1293] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1291] <... munmap resumed>) = 0 [pid 1302] set_robust_list(0x5555564066e0, 24 [pid 1298] <... futex resumed>) = 0 [pid 1296] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1293] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1291] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1297] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1303 attached [pid 1304] <... open resumed>) = 3 [pid 1302] <... set_robust_list resumed>) = 0 [pid 1298] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1296] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1293] <... futex resumed>) = 1 [pid 1291] <... openat resumed>) = 7 [pid 1287] <... futex resumed>) = 0 [pid 1302] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1288] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1302] <... prctl resumed>) = 0 [pid 1297] close(3 [pid 1296] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1293] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1303] set_robust_list(0x7f6fa100b9e0, 24 [pid 1291] ioctl(7, LOOP_SET_FD, 4 [pid 1304] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1288] ioctl(7, LOOP_CLR_FD [pid 1302] setpgid(0, 0 [pid 1298] <... futex resumed>) = 0 [pid 1296] <... futex resumed>) = 1 [pid 1297] <... close resumed>) = 0 [pid 1297] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1297] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1303] <... set_robust_list resumed>) = 0 [pid 1303] memfd_create("syzkaller", 0) = 4 [pid 1303] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1303] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1304] <... futex resumed>) = 1 [pid 1303] <... write resumed>) = 1048576 [pid 1302] <... setpgid resumed>) = 0 [pid 1298] openat(-1, "/proc/self/exe", O_RDONLY [pid 1296] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1291] <... ioctl resumed>) = 0 [pid 1288] <... ioctl resumed>) = 0 [pid 1276] +++ exited with 0 +++ [pid 1302] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1301] <... futex resumed>) = 0 [pid 1298] <... openat resumed>) = 3 [pid 1302] <... openat resumed>) = 3 [pid 1301] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1298] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1276, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1302] write(3, "1000", 4 [pid 1301] <... futex resumed>) = 0 [pid 1298] <... futex resumed>) = 1 [pid 1296] <... futex resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1302] <... write resumed>) = 4 [pid 1301] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1298] sendfile(6, 3, NULL, 140737974943952 [pid 1296] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... openat resumed>) = 3 [pid 1302] close(3 [pid 1296] <... futex resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1302] <... close resumed>) = 0 [pid 1296] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1302] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] close(3 [pid 1302] <... futex resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 1302] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1302] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1302] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1305 [pid 1302] <... mprotect resumed>) = 0 [ 27.001649][ T1288] loop2: detected capacity change from 0 to 2048 [ 27.020783][ T1288] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 27.041775][ T1297] loop3: detected capacity change from 0 to 2048 [ 27.050053][ T1291] loop4: detected capacity change from 0 to 2048 [pid 1302] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1306], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1306 [pid 1302] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1302] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1302] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1288] close(7 [pid 1302] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1288] <... close resumed>) = 0 [pid 1302] <... mprotect resumed>) = 0 [pid 1288] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1302] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1288] <... futex resumed>) = 0 [pid 1302] <... clone resumed>, parent_tid=[1307], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1307 [pid 1288] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1302] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1302] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1291] close(4) = 0 [pid 1291] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1291] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1307 attached [pid 1307] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1307] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1307] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1302] <... futex resumed>) = 0 [pid 1302] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1302] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1307] <... futex resumed>) = 1 [pid 1307] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1307] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1302] <... futex resumed>) = 0 [pid 1302] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1302] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1307] <... futex resumed>) = 1 [pid 1307] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1307] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1302] <... futex resumed>) = 0 [pid 1302] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1302] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1307] <... futex resumed>) = 1 [pid 1307] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1307] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1302] <... futex resumed>) = 0 [pid 1302] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1302] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1307] <... futex resumed>) = 1 [pid 1307] sendfile(4, 5, NULL, 140737974943952./strace-static-x86_64: Process 1305 attached [pid 1305] set_robust_list(0x5555564066e0, 24) = 0 [pid 1305] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1305] setpgid(0, 0) = 0 [pid 1305] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1305] write(3, "1000", 4) = 4 [pid 1305] close(3) = 0 [pid 1305] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1305] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1305] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1305] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1308], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1308 [pid 1305] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1305] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1305] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1305] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1305] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1309], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1309 [pid 1285] exit_group(0 [pid 1304] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1303] munmap(0x7f6f98bca000, 1048576 [pid 1289] <... futex resumed>) = ? [pid 1288] <... futex resumed>) = ? [pid 1285] <... exit_group resumed>) = ? [pid 1289] +++ exited with 0 +++ [pid 1288] +++ exited with 0 +++ [pid 1305] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1305] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1308 attached [pid 1308] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1308] memfd_create("syzkaller", 0) = 3 [pid 1304] <... mount resumed>) = 0 [pid 1304] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1301] <... futex resumed>) = 0 [pid 1301] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1301] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1308] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1304] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1304] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1303] <... munmap resumed>) = 0 [pid 1298] <... sendfile resumed>) = 1048576 [pid 1298] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1296] <... futex resumed>) = 0 [pid 1298] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1304] <... futex resumed>) = 1 [pid 1301] <... futex resumed>) = 0 [pid 1303] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1301] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1304] openat(-1, "/proc/self/exe", O_RDONLY [pid 1301] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1303] <... openat resumed>) = 6 [pid 1304] <... openat resumed>) = 7 [pid 1303] ioctl(6, LOOP_SET_FD, 4 [pid 1307] <... sendfile resumed>) = 1048576 [pid 1304] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1303] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1307] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1302] <... futex resumed>) = 0 [pid 1301] <... futex resumed>) = 0 [pid 1304] <... futex resumed>) = 1 [pid 1303] ioctl(6, LOOP_CLR_FD [pid 1301] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1307] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1301] <... futex resumed>) = 0 [pid 1304] sendfile(5, 7, NULL, 140737974943952 [pid 1303] <... ioctl resumed>) = 0 [pid 1301] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1308] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1304] <... sendfile resumed>) = 1048576 ./strace-static-x86_64: Process 1306 attached [pid 1306] set_robust_list(0x7f6fa100b9e0, 24 [pid 1304] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1303] ioctl(6, LOOP_SET_FD, 4 [pid 1301] <... futex resumed>) = 0 [pid 1304] <... futex resumed>) = 1 [pid 1306] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 1309 attached [pid 1304] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1303] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1306] memfd_create("syzkaller", 0 [pid 1303] close(6 [pid 1306] <... memfd_create resumed>) = 6 [pid 1309] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1303] <... close resumed>) = 0 [pid 1309] <... set_robust_list resumed>) = 0 [pid 1306] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1303] close(4 [pid 1297] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1308] <... write resumed>) = 1048576 [pid 1308] munmap(0x7f6f98bca000, 1048576 [pid 1306] <... mmap resumed>) = 0x7f6f98bca000 [pid 1308] <... munmap resumed>) = 0 [pid 1308] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1303] <... close resumed>) = 0 [pid 1308] <... openat resumed>) = 4 [pid 1308] ioctl(4, LOOP_SET_FD, 3 [pid 1309] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1306] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1303] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1297] ioctl(5, LOOP_CLR_FD [pid 1301] exit_group(0 [pid 1304] <... futex resumed>) = ? [pid 1301] <... exit_group resumed>) = ? [pid 1304] +++ exited with 0 +++ [pid 1303] <... futex resumed>) = ? [pid 1303] +++ exited with 0 +++ [pid 1301] +++ exited with 0 +++ [pid 1309] <... open resumed>) = 5 [pid 1297] <... ioctl resumed>) = 0 [pid 1309] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1297] close(5) = 0 [pid 1309] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1297] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1297] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1305] <... futex resumed>) = 0 [pid 1296] exit_group(0 [pid 1305] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1301, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1296] <... exit_group resumed>) = ? [pid 1298] <... futex resumed>) = ? [pid 1305] <... futex resumed>) = 1 [pid 1298] +++ exited with 0 +++ [pid 1309] <... futex resumed>) = 0 [pid 1309] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1305] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1309] <... mount resumed>) = 0 [pid 1309] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1309] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1306] <... write resumed>) = 1048576 [pid 1306] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1306] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 1306] ioctl(7, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 1306] ioctl(7, LOOP_CLR_FD) = 0 [ 27.066522][ T1297] EXT4-fs warning (device loop3): read_mmp_block:107: Error -117 while reading MMP block 64 [ 27.102586][ T1308] loop1: detected capacity change from 0 to 2048 [pid 1308] <... ioctl resumed>) = 0 [pid 1305] <... futex resumed>) = 0 [pid 1297] <... futex resumed>) = ? [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1305] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 407] <... openat resumed>) = 3 [pid 1309] <... futex resumed>) = 0 [pid 1306] ioctl(7, LOOP_SET_FD, 6 [pid 1309] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1306] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1297] +++ exited with 0 +++ [pid 1296] +++ exited with 0 +++ [pid 1308] close(3 [pid 1305] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1296, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 407] ioctl(3, LOOP_CLR_FD [pid 1309] <... open resumed>) = 6 [pid 1308] <... close resumed>) = 0 [pid 1306] close(7 [pid 1291] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1285] +++ exited with 0 +++ [pid 407] <... ioctl resumed>) = 0 [pid 1308] mkdir("./bus", 0777 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1285, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 407] close(3 [pid 1291] ioctl(7, LOOP_CLR_FD [pid 1308] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 407] <... close resumed>) = 0 [pid 1309] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1308] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1306] <... close resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1309] <... futex resumed>) = 1 [pid 1306] close(6 [pid 1305] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1309] openat(-1, "/proc/self/exe", O_RDONLY [pid 1306] <... close resumed>) = 0 [pid 1305] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... openat resumed>) = 3 [pid 1309] <... openat resumed>) = 3 [pid 1306] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1305] <... futex resumed>) = 0 [pid 1309] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1306] <... futex resumed>) = 0 [pid 1305] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1309] <... futex resumed>) = 0 [pid 1306] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1305] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1309] sendfile(6, 3, NULL, 140737974943952 [pid 1305] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1302] exit_group(0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 1305] <... futex resumed>) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1312 [pid 1307] <... futex resumed>) = ? [pid 1306] <... futex resumed>) = ? [pid 1305] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1302] <... exit_group resumed>) = ? [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1307] +++ exited with 0 +++ [pid 1306] +++ exited with 0 +++ ./strace-static-x86_64: Process 1312 attached [pid 1302] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1302, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 409] close(3) = 0 [pid 410] <... openat resumed>) = 3 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] ioctl(3, LOOP_CLR_FD [pid 1312] set_robust_list(0x5555564066e0, 24 [pid 410] <... ioctl resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1313 [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1312] <... set_robust_list resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1314 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1312] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1315 [pid 1312] setpgid(0, 0) = 0 [pid 1312] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1312] write(3, "1000", 4) = 4 [pid 1312] close(3) = 0 [pid 1312] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1312] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1312] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1312] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1316], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1316 [pid 1312] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1312] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1312] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1312] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1312] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1317], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1317 [pid 1312] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1312] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1313 attached [pid 1313] set_robust_list(0x5555564066e0, 24) = 0 [pid 1313] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1313] setpgid(0, 0) = 0 [pid 1313] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1313] write(3, "1000", 4) = 4 [pid 1313] close(3) = 0 [pid 1313] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1313] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1313] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1313] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1318], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1318 [pid 1313] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1313] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1313] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1313] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1313] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1319], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1319 [pid 1313] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1313] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1317 attached [pid 1317] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1317] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1317] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1312] <... futex resumed>) = 0 [pid 1312] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1312] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1317] <... futex resumed>) = 1 [pid 1317] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 1314 attached [pid 1314] set_robust_list(0x5555564066e0, 24 [pid 1317] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1314] <... set_robust_list resumed>) = 0 [pid 1314] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1312] <... futex resumed>) = 0 [pid 1314] <... prctl resumed>) = 0 [pid 1314] setpgid(0, 0) = 0 [pid 1314] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1309] <... sendfile resumed>) = 1048576 [pid 1312] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1309] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1314] <... openat resumed>) = 3 [pid 1312] <... futex resumed>) = 0 [pid 1309] <... futex resumed>) = 1 [pid 1305] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1315 attached [pid 1312] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1309] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1315] set_robust_list(0x5555564066e0, 24 [pid 1314] write(3, "1000", 4 [pid 1315] <... set_robust_list resumed>) = 0 [pid 1314] <... write resumed>) = 4 [pid 1314] close(3) = 0 [pid 1315] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1314] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1315] <... prctl resumed>) = 0 [pid 1314] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1319 attached [pid 1314] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1319] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1315] setpgid(0, 0 [pid 1314] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1319] <... set_robust_list resumed>) = 0 [pid 1315] <... setpgid resumed>) = 0 [pid 1314] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1314] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1317] <... futex resumed>) = 1 [pid 1319] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1315] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1314] <... clone resumed>, parent_tid=[1320], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1320 [pid 1315] <... openat resumed>) = 3 [pid 1314] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1315] write(3, "1000", 4 [pid 1314] <... futex resumed>) = 0 [pid 1319] <... open resumed>) = 3 [pid 1315] <... write resumed>) = 4 [pid 1314] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1319] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1315] close(3 [pid 1314] <... futex resumed>) = 0 [pid 1319] <... futex resumed>) = 1 [pid 1315] <... close resumed>) = 0 [pid 1314] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1313] <... futex resumed>) = 0 [pid 1313] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1320 attached ) = 0 [pid 1319] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1315] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1314] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1291] <... ioctl resumed>) = 0 [pid 1320] set_robust_list(0x7f6fa100b9e0, 24 [pid 1319] <... mount resumed>) = 0 [pid 1314] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1313] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1291] close(7 [pid 1315] <... futex resumed>) = 0 [pid 1320] <... set_robust_list resumed>) = 0 [pid 1319] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1315] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1314] <... mprotect resumed>) = 0 [pid 1313] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1291] <... close resumed>) = 0 [pid 1320] memfd_create("syzkaller", 0 [pid 1319] <... futex resumed>) = 0 [pid 1317] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1315] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1314] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1313] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1291] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1316 attached [pid 1320] <... memfd_create resumed>) = 3 [pid 1319] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1317] <... open resumed>) = 4 [pid 1315] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1313] <... futex resumed>) = 0 [pid 1291] <... futex resumed>) = 0 [pid 1320] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1319] <... open resumed>) = 4 [pid 1317] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1316] set_robust_list(0x7f6fa100b9e0, 24 [pid 1315] <... mprotect resumed>) = 0 [pid 1314] <... clone resumed>, parent_tid=[1321], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1321 [pid 1313] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1291] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1287] exit_group(0 [pid 1320] <... mmap resumed>) = 0x7f6f98bca000 [pid 1319] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1317] <... futex resumed>) = 1 [pid 1316] <... set_robust_list resumed>) = 0 [pid 1315] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1314] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1313] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1312] <... futex resumed>) = 0 [pid 1308] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1293] <... futex resumed>) = ? [pid 1291] <... futex resumed>) = ? [pid 1287] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1318 attached [pid 1319] <... futex resumed>) = 0 [pid 1317] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1316] memfd_create("syzkaller", 0 [pid 1314] <... futex resumed>) = 0 [pid 1313] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1312] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1293] +++ exited with 0 +++ [pid 1291] +++ exited with 0 +++ [pid 1319] openat(-1, "/proc/self/exe", O_RDONLY [pid 1318] set_robust_list(0x7f6fa100b9e0, 24 [pid 1317] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1316] <... memfd_create resumed>) = 5 [pid 1315] <... clone resumed>, parent_tid=[1322], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1322 [pid 1314] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1313] <... futex resumed>) = 0 [pid 1312] <... futex resumed>) = 0 [pid 1319] <... openat resumed>) = 5 [pid 1318] <... set_robust_list resumed>) = 0 [pid 1317] openat(-1, "/proc/self/exe", O_RDONLY [pid 1316] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1315] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1313] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1312] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1319] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1318] memfd_create("syzkaller", 0 [pid 1317] <... openat resumed>) = 6 [pid 1316] <... mmap resumed>) = 0x7f6f98bca000 [pid 1315] <... futex resumed>) = 0 [pid 1313] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1308] ioctl(4, LOOP_CLR_FD [pid 1320] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1319] <... futex resumed>) = 0 [pid 1318] <... memfd_create resumed>) = 6 [pid 1317] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1316] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1315] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1313] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1318] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1317] <... futex resumed>) = 1 [pid 1313] <... futex resumed>) = 0 [pid 1312] <... futex resumed>) = 0 [pid 1318] <... mmap resumed>) = 0x7f6f98bca000 [pid 1317] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1313] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1312] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1322 attached ./strace-static-x86_64: Process 1321 attached [pid 1320] <... write resumed>) = 1048576 [pid 1319] sendfile(4, 5, NULL, 140737974943952 [pid 1318] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1317] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1315] <... futex resumed>) = 0 [pid 1312] <... futex resumed>) = 0 [pid 1308] <... ioctl resumed>) = 0 [pid 1322] set_robust_list(0x7f6fa100b9e0, 24 [pid 1321] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1320] munmap(0x7f6f98bca000, 1048576 [pid 1319] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1317] sendfile(4, 6, NULL, 140737974943952 [pid 1315] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1312] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1308] close(4 [pid 1322] <... set_robust_list resumed>) = 0 [pid 1321] <... set_robust_list resumed>) = 0 [pid 1320] <... munmap resumed>) = 0 [pid 1319] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1317] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1316] <... write resumed>) = 1048576 [pid 1315] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1308] <... close resumed>) = 0 [pid 1322] memfd_create("syzkaller", 0 [pid 1321] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1320] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1319] <... futex resumed>) = 1 [pid 1317] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1315] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1313] <... futex resumed>) = 0 [pid 1308] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1322] <... memfd_create resumed>) = 3 [pid 1321] <... open resumed>) = 4 [pid 1319] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1317] <... futex resumed>) = 1 [pid 1315] <... mprotect resumed>) = 0 [pid 1312] <... futex resumed>) = 0 [pid 1308] <... futex resumed>) = 0 [pid 1322] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1321] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1318] <... write resumed>) = 1048576 [pid 1317] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1316] munmap(0x7f6f98bca000, 1048576 [pid 1315] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1308] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1305] exit_group(0 [pid 1322] <... mmap resumed>) = 0x7f6f98bca000 [pid 1321] <... futex resumed>) = 1 [pid 1318] munmap(0x7f6f98bca000, 1048576 [pid 1314] <... futex resumed>) = 0 [pid 1309] <... futex resumed>) = ? [pid 1308] <... futex resumed>) = ? [pid 1305] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1323 attached [pid 1321] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1318] <... munmap resumed>) = 0 [pid 1316] <... munmap resumed>) = 0 [pid 1315] <... clone resumed>, parent_tid=[1323], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1323 [pid 1314] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1309] +++ exited with 0 +++ [pid 1308] +++ exited with 0 +++ [pid 1323] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1321] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1318] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1316] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1315] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1314] <... futex resumed>) = 0 [pid 1305] +++ exited with 0 +++ [pid 1323] <... set_robust_list resumed>) = 0 [pid 1321] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1318] <... openat resumed>) = 7 [pid 1316] <... openat resumed>) = 7 [pid 1315] <... futex resumed>) = 0 [pid 1314] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1323] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1322] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1321] <... mount resumed>) = 0 [ 27.110778][ T1291] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 27.136194][ T1308] EXT4-fs warning (device loop1): read_mmp_block:107: Error -117 while reading MMP block 64 [pid 1318] ioctl(7, LOOP_SET_FD, 6 [pid 1316] ioctl(7, LOOP_SET_FD, 5 [pid 1315] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1305, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1322] <... write resumed>) = 1048576 [pid 1321] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1322] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1322] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 1322] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1322] ioctl(5, LOOP_CLR_FD) = 0 [pid 1316] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1316] ioctl(7, LOOP_CLR_FD) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 1322] ioctl(5, LOOP_SET_FD, 3 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1322] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1322] close(5 [pid 1316] ioctl(7, LOOP_SET_FD, 5 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1324 [pid 1322] <... close resumed>) = 0 [pid 1316] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1322] close(3 [pid 1316] close(7) = 0 [pid 1316] close(5./strace-static-x86_64: Process 1324 attached [pid 1322] <... close resumed>) = 0 [pid 1321] <... futex resumed>) = 1 [pid 1318] <... ioctl resumed>) = 0 [pid 1314] <... futex resumed>) = 0 [pid 1324] set_robust_list(0x5555564066e0, 24 [pid 1322] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1321] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1318] close(6 [pid 1316] <... close resumed>) = 0 [pid 1314] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1324] <... set_robust_list resumed>) = 0 [pid 1322] <... futex resumed>) = 0 [pid 1321] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1318] <... close resumed>) = 0 [pid 1316] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1314] <... futex resumed>) = 0 [pid 1324] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1323] <... open resumed>) = 4 [pid 1322] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1321] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1320] <... openat resumed>) = 5 [pid 1318] mkdir("./bus", 0777 [pid 1316] <... futex resumed>) = 0 [pid 1314] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1324] <... prctl resumed>) = 0 [pid 1323] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1321] <... open resumed>) = 6 [pid 1320] ioctl(5, LOOP_SET_FD, 3 [pid 1318] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1316] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1312] exit_group(0 [pid 1317] <... futex resumed>) = ? [pid 1316] <... futex resumed>) = ? [pid 1312] <... exit_group resumed>) = ? [pid 1317] +++ exited with 0 +++ [pid 1316] +++ exited with 0 +++ [pid 1324] setpgid(0, 0) = 0 [pid 1324] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1324] write(3, "1000", 4) = 4 [pid 1324] close(3) = 0 [pid 1324] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1324] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1324] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1324] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1325], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1325 [pid 1324] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1324] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1324] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1324] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1324] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1326], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1326 [pid 1324] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1324] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1326 attached [pid 1326] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1326] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1325 attached [pid 1325] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1323] <... futex resumed>) = 1 [pid 1321] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1318] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1315] <... futex resumed>) = 0 [pid 1323] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1321] <... futex resumed>) = 1 [pid 1315] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1314] <... futex resumed>) = 0 [pid 1321] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1315] <... futex resumed>) = 1 [pid 1314] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1322] <... futex resumed>) = 0 [pid 1321] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1315] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1314] <... futex resumed>) = 0 [pid 1322] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1321] openat(-1, "/proc/self/exe", O_RDONLY [pid 1320] <... ioctl resumed>) = 0 [pid 1314] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1321] <... openat resumed>) = 7 [pid 1322] <... mount resumed>) = 0 [pid 1321] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1320] close(3 [pid 1322] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1321] <... futex resumed>) = 1 [pid 1320] <... close resumed>) = 0 [pid 1314] <... futex resumed>) = 0 [pid 1322] <... futex resumed>) = 1 [pid 1315] <... futex resumed>) = 0 [pid 1287] +++ exited with 0 +++ [pid 1321] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1315] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1314] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1315] <... futex resumed>) = 0 [pid 1315] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1326] <... open resumed>) = 3 [pid 1326] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1324] <... futex resumed>) = 0 [pid 1324] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1324] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1326] <... futex resumed>) = 1 [pid 1326] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1326] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1324] <... futex resumed>) = 0 [pid 1324] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1326] <... futex resumed>) = 1 [pid 1324] <... futex resumed>) = 0 [pid 1326] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1324] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1325] memfd_create("syzkaller", 0) = 5 [pid 1325] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1325] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1287, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1321] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1314] <... futex resumed>) = 0 [pid 1321] sendfile(6, 7, NULL, 140737974943952 [pid 1314] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1322] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1325] <... write resumed>) = 1048576 [pid 1325] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1325] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1320] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1320] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [ 27.184536][ T1318] loop2: detected capacity change from 0 to 2048 [ 27.197358][ T1320] loop3: detected capacity change from 0 to 2048 [ 27.210950][ T1318] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 1320] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1320] ioctl(5, LOOP_CLR_FD) = 0 [pid 1320] close(5) = 0 [pid 1320] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1320] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1329 [pid 1326] <... open resumed>) = 4 [pid 1325] <... openat resumed>) = 6 [pid 1312] +++ exited with 0 +++ [pid 1326] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1325] ioctl(6, LOOP_SET_FD, 5 [pid 1326] <... futex resumed>) = 1 [pid 1324] <... futex resumed>) = 0 [pid 1321] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1318] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1312, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1318] ioctl(7, LOOP_CLR_FD [pid 1321] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1326] openat(-1, "/proc/self/exe", O_RDONLY [pid 1324] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1318] <... ioctl resumed>) = 0 [pid 1321] <... futex resumed>) = 1 [pid 1314] <... futex resumed>) = 0 [pid 1326] <... openat resumed>) = 7 [pid 1324] <... futex resumed>) = 0 [pid 1321] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1318] close(7 [pid 1314] exit_group(0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1318] <... close resumed>) = 0 [pid 1314] <... exit_group resumed>) = ? [pid 1326] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1324] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1318] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... openat resumed>) = 3 [pid 1321] <... futex resumed>) = 3 [pid 1326] <... futex resumed>) = 0 [pid 1324] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1326] sendfile(4, 7, NULL, 140737974943952 [pid 1324] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1326] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1324] <... futex resumed>) = 0 [pid 1318] <... futex resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1326] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1324] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1326] <... futex resumed>) = 0 [pid 1324] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1326] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1325] <... ioctl resumed>) = 0 [pid 1320] <... futex resumed>) = ? [pid 1322] <... open resumed>) = 3 [pid 1313] exit_group(0) = ? [pid 1320] +++ exited with 0 +++ [pid 1325] close(5) = 0 [pid 1325] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1325] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1319] <... futex resumed>) = ? [pid 1322] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... ioctl resumed>) = 0 [pid 1319] +++ exited with 0 +++ ./strace-static-x86_64: Process 1329 attached [pid 1329] set_robust_list(0x5555564066e0, 24) = 0 [pid 1329] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1329] setpgid(0, 0) = 0 [pid 1329] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1329] write(3, "1000", 4) = 4 [pid 1329] close(3) = 0 [pid 1329] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1315] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1315] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1315] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1329] <... futex resumed>) = 0 [pid 1329] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1329] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1329] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1330], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1330 [pid 1329] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1329] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1329] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1329] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1329] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1331], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1331 [pid 1329] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1329] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1331 attached [pid 1331] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1331] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1331] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1329] <... futex resumed>) = 0 [pid 1329] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1329] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1331] <... futex resumed>) = 1 [pid 1331] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1331] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1329] <... futex resumed>) = 0 [pid 1329] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1329] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1331] <... futex resumed>) = 1 [pid 1331] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1331] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1329] <... futex resumed>) = 0 [pid 1329] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1329] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1331] <... futex resumed>) = 1 [pid 1331] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1331] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1329] <... futex resumed>) = 0 [pid 1329] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1329] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1322] <... futex resumed>) = 1 [pid 1315] <... futex resumed>) = 0 [pid 407] close(3 [pid 1331] <... futex resumed>) = 1 [pid 1331] sendfile(4, 5, NULL, 140737974943952 [pid 1322] openat(-1, "/proc/self/exe", O_RDONLY [pid 1315] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=44000000} [pid 1331] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1331] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1329] <... futex resumed>) = 0 [pid 1322] <... openat resumed>) = 5 [pid 407] <... close resumed>) = 0 [pid 1331] <... futex resumed>) = 1 [pid 1331] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1330 attached [pid 1330] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1330] memfd_create("syzkaller", 0) = 6 [pid 1330] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1322] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1315] <... futex resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1322] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1315] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1322] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1315] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1333 [pid 1322] sendfile(3, 5, NULL, 140737974943952./strace-static-x86_64: Process 1333 attached [pid 1330] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1322] <... sendfile resumed>) = 1048576 [pid 1333] set_robust_list(0x5555564066e0, 24 [pid 1330] <... write resumed>) = 1048576 [ 27.224778][ T1321] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 27.224859][ T1320] EXT4-fs (loop3): VFS: Can't find ext4 filesystem [ 27.240296][ T1321] File: /root/bus PID: 1321 Comm: syz-executor138 [ 27.248827][ T1325] loop1: detected capacity change from 0 to 2048 [ 27.271051][ T1332] EXT4-fs warning (device loop1): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [pid 1322] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] <... set_robust_list resumed>) = 0 [pid 1330] munmap(0x7f6f98bca000, 1048576 [pid 1322] <... futex resumed>) = 1 [pid 1315] <... futex resumed>) = 0 [pid 1333] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1330] <... munmap resumed>) = 0 [pid 1322] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1315] exit_group(0 [pid 1333] <... prctl resumed>) = 0 [pid 1330] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1323] <... futex resumed>) = ? [pid 1322] <... futex resumed>) = ? [pid 1315] <... exit_group resumed>) = ? [pid 1333] setpgid(0, 0 [pid 1330] <... openat resumed>) = 7 [pid 1323] +++ exited with 0 +++ [pid 1322] +++ exited with 0 +++ [pid 1315] +++ exited with 0 +++ [pid 1333] <... setpgid resumed>) = 0 [pid 1330] ioctl(7, LOOP_SET_FD, 6 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1315, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1333] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1335 ./strace-static-x86_64: Process 1335 attached [pid 1335] set_robust_list(0x5555564066e0, 24) = 0 [pid 1335] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1335] setpgid(0, 0) = 0 [pid 1335] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1335] write(3, "1000", 4) = 4 [pid 1335] close(3) = 0 [pid 1335] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1335] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1335] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1335] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1333] <... openat resumed>) = 3 [pid 1333] write(3, "1000", 4 [pid 1330] <... ioctl resumed>) = 0 [pid 1333] <... write resumed>) = 4 ./strace-static-x86_64: Process 1336 attached [pid 1333] close(3 [pid 1330] close(6 [pid 1336] set_robust_list(0x7f6fa100b9e0, 24 [pid 1335] <... clone resumed>, parent_tid=[1336], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1336 [pid 1333] <... close resumed>) = 0 [pid 1325] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1336] <... set_robust_list resumed>) = 0 [pid 1335] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1330] <... close resumed>) = 0 [pid 1335] <... futex resumed>) = 0 [pid 1330] mkdir("./bus", 0777 [pid 1333] <... futex resumed>) = 0 [pid 1325] ioctl(6, LOOP_CLR_FD [pid 1335] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1333] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1330] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1336] memfd_create("syzkaller", 0 [pid 1335] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1333] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1330] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1336] <... memfd_create resumed>) = 3 [pid 1336] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1335] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1336] <... mmap resumed>) = 0x7f6f98bca000 [pid 1335] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1333] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1335] <... mprotect resumed>) = 0 [pid 1333] <... mprotect resumed>) = 0 [pid 1335] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1333] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1335] <... clone resumed>, parent_tid=[1337], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1337 [pid 1335] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] <... clone resumed>, parent_tid=[1338], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1338 [pid 1335] <... futex resumed>) = 0 [pid 1333] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1335] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1333] <... futex resumed>) = 0 [pid 1333] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1325] <... ioctl resumed>) = 0 [pid 1333] <... futex resumed>) = 0 [pid 1325] close(6 [pid 1333] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1325] <... close resumed>) = 0 [pid 1333] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 ./strace-static-x86_64: Process 1337 attached [pid 1325] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1325] <... futex resumed>) = 0 [pid 1325] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1337] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1333] <... clone resumed>, parent_tid=[1339], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1339 [pid 1333] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1337] <... set_robust_list resumed>) = 0 [pid 1324] exit_group(0 [pid 1326] <... futex resumed>) = ? [pid 1325] <... futex resumed>) = ? [pid 1324] <... exit_group resumed>) = ? [pid 1326] +++ exited with 0 +++ [pid 1318] +++ exited with 0 +++ [pid 1313] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1313, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 409] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 1321] +++ exited with 0 +++ [pid 1314] +++ exited with 0 +++ [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1314, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1340 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR./strace-static-x86_64: Process 1338 attached [pid 1338] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1338] memfd_create("syzkaller", 0) = 3 [pid 1338] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1333] <... futex resumed>) = 0 [pid 1333] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1337] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1325] +++ exited with 0 +++ [pid 1324] +++ exited with 0 +++ [pid 410] <... openat resumed>) = 3 [pid 410] ioctl(3, LOOP_CLR_FD [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1324, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1343 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 1336] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1344 ./strace-static-x86_64: Process 1340 attached [pid 1340] set_robust_list(0x5555564066e0, 24) = 0 [pid 1340] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 1343 attached ./strace-static-x86_64: Process 1339 attached ) = 0 [pid 1343] set_robust_list(0x5555564066e0, 24 [pid 1340] setpgid(0, 0 [pid 1339] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1343] <... set_robust_list resumed>) = 0 [pid 1340] <... setpgid resumed>) = 0 [pid 1339] <... set_robust_list resumed>) = 0 [pid 1338] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1336] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1344 attached [pid 1343] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1340] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1339] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1344] set_robust_list(0x5555564066e0, 24 [pid 1343] <... prctl resumed>) = 0 [pid 1340] <... openat resumed>) = 3 [pid 1339] <... open resumed>) = 4 [pid 1344] <... set_robust_list resumed>) = 0 [pid 1343] setpgid(0, 0 [pid 1340] write(3, "1000", 4 [pid 1339] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1344] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1343] <... setpgid resumed>) = 0 [pid 1340] <... write resumed>) = 4 [pid 1339] <... futex resumed>) = 1 [pid 1337] <... open resumed>) = 4 [pid 1333] <... futex resumed>) = 0 [pid 1337] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1340] close(3 [pid 1337] <... futex resumed>) = 1 [pid 1335] <... futex resumed>) = 0 [pid 1333] <... futex resumed>) = 0 [pid 1344] <... prctl resumed>) = 0 [pid 1343] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1340] <... close resumed>) = 0 [pid 1339] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1337] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1336] munmap(0x7f6f98bca000, 1048576 [pid 1335] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1344] setpgid(0, 0 [pid 1343] <... openat resumed>) = 3 [pid 1340] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1339] <... mount resumed>) = 0 [pid 1338] <... write resumed>) = 1048576 [pid 1337] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1336] <... munmap resumed>) = 0 [pid 1335] <... futex resumed>) = 0 [pid 1344] <... setpgid resumed>) = 0 [pid 1343] write(3, "1000", 4 [pid 1340] <... futex resumed>) = 0 [pid 1339] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1337] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1336] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1335] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1344] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1343] <... write resumed>) = 4 [pid 1340] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1339] <... futex resumed>) = 1 [pid 1337] <... mount resumed>) = 0 [pid 1336] <... openat resumed>) = 5 [pid 1333] <... futex resumed>) = 0 [pid 1330] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1344] <... openat resumed>) = 3 [pid 1343] close(3 [pid 1340] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1339] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1337] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1336] ioctl(5, LOOP_SET_FD, 3 [ 27.282197][ T1325] EXT4-fs (loop1): get root inode failed [ 27.287899][ T1325] EXT4-fs (loop1): mount failed [ 27.288455][ T1330] loop4: detected capacity change from 0 to 2048 [ 27.316524][ T1330] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1333] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1330] ioctl(7, LOOP_CLR_FD [pid 1344] write(3, "1000", 4 [pid 1343] <... close resumed>) = 0 [pid 1340] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1339] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1337] <... futex resumed>) = 1 [pid 1335] <... futex resumed>) = 0 [pid 1333] <... futex resumed>) = 0 [pid 1330] <... ioctl resumed>) = 0 [pid 1344] <... write resumed>) = 4 [pid 1343] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1340] <... mprotect resumed>) = 0 [pid 1339] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1337] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1335] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1330] close(7 [pid 1344] close(3 [pid 1343] <... futex resumed>) = 0 [pid 1340] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1338] munmap(0x7f6f98bca000, 1048576 [pid 1337] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1335] <... futex resumed>) = 0 [pid 1330] <... close resumed>) = 0 [pid 1344] <... close resumed>) = 0 [pid 1343] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1338] <... munmap resumed>) = 0 [pid 1337] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1335] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1330] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1344] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1343] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1340] <... clone resumed>, parent_tid=[1345], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1345 [pid 1338] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1330] <... futex resumed>) = 0 [pid 1344] <... futex resumed>) = 0 [pid 1343] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1340] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1330] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1344] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1343] <... mprotect resumed>) = 0 [pid 1340] <... futex resumed>) = 0 [pid 1338] <... openat resumed>) = 6 [pid 1329] exit_group(0 [pid 1344] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1343] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1340] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1338] ioctl(6, LOOP_SET_FD, 3 [pid 1331] <... futex resumed>) = ? [pid 1330] <... futex resumed>) = ? [pid 1329] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1345 attached [pid 1344] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1340] <... futex resumed>) = 0 [pid 1338] <... ioctl resumed>) = 0 [pid 1331] +++ exited with 0 +++ [pid 1344] <... mprotect resumed>) = 0 [pid 1343] <... clone resumed>, parent_tid=[1346], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1346 [pid 1340] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1344] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1343] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1340] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1343] <... futex resumed>) = 0 [pid 1340] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1344] <... clone resumed>, parent_tid=[1347], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1347 [pid 1343] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1340] <... mprotect resumed>) = 0 [pid 1344] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1343] <... futex resumed>) = 0 [pid 1340] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1344] <... futex resumed>) = 0 [pid 1343] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1344] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1343] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1340] <... clone resumed>, parent_tid=[1348], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1348 [pid 1344] <... futex resumed>) = 0 [pid 1343] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1340] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1344] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1343] <... mprotect resumed>) = 0 [pid 1340] <... futex resumed>) = 0 [pid 1344] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1343] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1340] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1344] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1343] <... clone resumed>, parent_tid=[1349], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1349 [pid 1344] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1343] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1345] set_robust_list(0x7f6fa100b9e0, 24 [pid 1344] <... clone resumed>, parent_tid=[1350], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1350 [pid 1343] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1344] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1345] <... set_robust_list resumed>) = 0 [pid 1344] <... futex resumed>) = 0 [pid 1344] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1345] memfd_create("syzkaller", 0) = 3 ./strace-static-x86_64: Process 1347 attached [pid 1347] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1345] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1347] memfd_create("syzkaller", 0 [pid 1345] <... mmap resumed>) = 0x7f6f98bca000 [pid 1339] <... open resumed>) = 5 [pid 1337] <... open resumed>) = 6 [pid 1347] <... memfd_create resumed>) = 3 [pid 1339] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1337] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1336] <... ioctl resumed>) = 0 [pid 1347] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1339] <... futex resumed>) = 1 [pid 1337] <... futex resumed>) = 1 [pid 1336] close(3 [pid 1335] <... futex resumed>) = 0 [pid 1333] <... futex resumed>) = 0 [pid 1347] <... mmap resumed>) = 0x7f6f98bca000 [pid 1339] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1337] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1336] <... close resumed>) = 0 [pid 1335] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1349 attached [pid 1339] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1336] mkdir("./bus", 0777 [pid 1333] <... futex resumed>) = 0 [pid 1349] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1339] openat(-1, "/proc/self/exe", O_RDONLY [pid 1337] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1336] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1335] <... futex resumed>) = 0 [pid 1333] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1349] <... set_robust_list resumed>) = 0 [pid 1339] <... openat resumed>) = 7 [pid 1337] openat(-1, "/proc/self/exe", O_RDONLY [pid 1336] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1335] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1349] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1339] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1337] <... openat resumed>) = 3 ./strace-static-x86_64: Process 1346 attached [pid 1349] <... open resumed>) = 3 [pid 1347] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1339] <... futex resumed>) = 1 [pid 1337] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1350 attached ./strace-static-x86_64: Process 1348 attached [pid 1349] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1346] set_robust_list(0x7f6fa100b9e0, 24 [pid 1339] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1337] <... futex resumed>) = 1 [pid 1335] <... futex resumed>) = 0 [pid 1333] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1350] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1349] <... futex resumed>) = 1 [pid 1348] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1346] <... set_robust_list resumed>) = 0 [pid 1343] <... futex resumed>) = 0 [pid 1339] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1337] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1335] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1333] <... futex resumed>) = 0 [pid 1350] <... set_robust_list resumed>) = 0 [pid 1349] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1348] <... set_robust_list resumed>) = 0 [pid 1346] memfd_create("syzkaller", 0 [pid 1345] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [ 27.344965][ T1336] loop5: detected capacity change from 0 to 2048 [ 27.358514][ T1338] loop0: detected capacity change from 0 to 2048 [pid 1343] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1339] sendfile(5, 7, NULL, 140737974943952 [pid 1333] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1350] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1349] <... mount resumed>) = 0 [pid 1348] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1346] <... memfd_create resumed>) = 4 [pid 1345] <... write resumed>) = 1048576 [pid 1343] <... futex resumed>) = 0 [pid 1339] <... sendfile resumed>) = 1048576 [pid 1338] close(3 [pid 1337] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1335] <... futex resumed>) = 0 [pid 1330] +++ exited with 0 +++ [pid 1329] +++ exited with 0 +++ [pid 1350] <... open resumed>) = 4 [pid 1349] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1348] <... open resumed>) = 4 [pid 1347] <... write resumed>) = 1048576 [pid 1346] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1345] munmap(0x7f6f98bca000, 1048576 [pid 1343] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1339] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1338] <... close resumed>) = 0 [pid 1337] sendfile(6, 3, NULL, 140737974943952 [pid 1335] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1350] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1349] <... futex resumed>) = 0 [pid 1348] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1346] <... mmap resumed>) = 0x7f6f98bca000 [pid 1345] <... munmap resumed>) = 0 [pid 1343] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1339] <... futex resumed>) = 1 [pid 1338] mkdir("./bus", 0777 [pid 1333] <... futex resumed>) = 0 [pid 1349] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1343] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1339] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1338] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1329, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1349] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1343] <... futex resumed>) = 0 [pid 1338] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1349] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1343] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1350] <... futex resumed>) = 1 [pid 1349] <... open resumed>) = 5 [pid 1348] <... futex resumed>) = 1 [pid 1344] <... futex resumed>) = 0 [pid 1340] <... futex resumed>) = 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 1349] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1344] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1340] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1349] <... futex resumed>) = 1 [pid 1344] <... futex resumed>) = 0 [pid 1343] <... futex resumed>) = 0 [pid 1340] <... futex resumed>) = 0 [pid 1349] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1344] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1343] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1340] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1349] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1343] <... futex resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1349] openat(-1, "/proc/self/exe", O_RDONLY [pid 1343] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1349] <... openat resumed>) = 6 [pid 411] <... openat resumed>) = 3 [pid 1349] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1347] munmap(0x7f6f98bca000, 1048576 [pid 1343] <... futex resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1350] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1349] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1347] <... munmap resumed>) = 0 [pid 1343] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... ioctl resumed>) = 0 [pid 1350] <... mount resumed>) = 0 [pid 1349] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1348] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1347] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1343] <... futex resumed>) = 0 [pid 411] close(3 [pid 1350] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1349] sendfile(5, 6, NULL, 140737974943952 [pid 1347] <... openat resumed>) = 5 [pid 1343] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1337] <... sendfile resumed>) = 1048576 [pid 411] <... close resumed>) = 0 [pid 1350] <... futex resumed>) = 1 [pid 1349] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1348] <... mount resumed>) = 0 [pid 1347] ioctl(5, LOOP_SET_FD, 3 [pid 1344] <... futex resumed>) = 0 [pid 1337] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1350] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1349] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1348] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1346] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1345] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1344] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1337] <... futex resumed>) = 1 [pid 1335] <... futex resumed>) = 0 [pid 1350] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1349] <... futex resumed>) = 1 [pid 1348] <... futex resumed>) = 1 [pid 1344] <... futex resumed>) = 0 [pid 1343] <... futex resumed>) = 0 [pid 1340] <... futex resumed>) = 0 [pid 1337] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1350] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1349] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1348] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1345] <... openat resumed>) = 5 [pid 1344] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1340] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1352 [pid 1350] <... open resumed>) = 6 [pid 1348] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1345] ioctl(5, LOOP_SET_FD, 3 [pid 1340] <... futex resumed>) = 0 [pid 1350] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1348] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [ 27.388786][ T1336] EXT4-fs warning (device loop5): read_mmp_block:107: Error -117 while reading MMP block 64 [ 27.420288][ T1347] loop1: detected capacity change from 0 to 2048 [ 27.429679][ T1345] loop2: detected capacity change from 0 to 2048 [pid 1340] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1350] <... futex resumed>) = 1 [pid 1346] <... write resumed>) = 1048576 [pid 1344] <... futex resumed>) = 0 [pid 1350] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1346] munmap(0x7f6f98bca000, 1048576 [pid 1344] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1336] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1350] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1344] <... futex resumed>) = 0 [pid 1350] openat(-1, "/proc/self/exe", O_RDONLY [pid 1344] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1350] <... openat resumed>) = 7 [pid 1350] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1346] <... munmap resumed>) = 0 [pid 1350] <... futex resumed>) = 1 [pid 1346] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1344] <... futex resumed>) = 0 [pid 1350] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1344] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1350] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1344] <... futex resumed>) = 0 [pid 1350] sendfile(6, 7, NULL, 140737974943952 [pid 1346] <... openat resumed>) = 7 [pid 1344] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1350] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1350] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1344] <... futex resumed>) = 0 [pid 1350] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1336] ioctl(5, LOOP_CLR_FD) = 0 [pid 1336] close(5) = 0 [pid 1336] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1336] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1346] ioctl(7, LOOP_SET_FD, 4 [pid 1347] <... ioctl resumed>) = 0 [pid 1335] exit_group(0) = ? [pid 1337] <... futex resumed>) = ? [pid 1347] close(3 [pid 1337] +++ exited with 0 +++ [pid 1347] <... close resumed>) = 0 [pid 1347] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1347] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1352 attached [pid 1352] set_robust_list(0x5555564066e0, 24 [pid 1336] <... futex resumed>) = ? [pid 1352] <... set_robust_list resumed>) = 0 [pid 1352] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1352] setpgid(0, 0) = 0 [pid 1352] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1352] write(3, "1000", 4) = 4 [pid 1352] close(3) = 0 [pid 1352] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1352] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1352] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1352] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1355], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1355 [pid 1352] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1352] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1352] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1352] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1352] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1356], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1356 [pid 1352] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1352] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1336] +++ exited with 0 +++ [pid 1335] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1335, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 412] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 1355 attached [pid 1355] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 412] <... restart_syscall resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1357 [pid 1355] memfd_create("syzkaller", 0) = 3 [pid 1355] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1355] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1340] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1340] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1340] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6f98ca9000 [pid 1340] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1340] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1358], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 1358 [pid 1340] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1340] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1338] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1355] <... write resumed>) = 1048576 [pid 1355] munmap(0x7f6f98bca000, 1048576 [pid 1338] ioctl(6, LOOP_CLR_FD) = 0 [pid 1338] close(6./strace-static-x86_64: Process 1357 attached ) = 0 [pid 1355] <... munmap resumed>) = 0 [pid 1355] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 1355] ioctl(4, LOOP_SET_FD, 3 [pid 1357] set_robust_list(0x5555564066e0, 24 [pid 1338] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1333] exit_group(0 [pid 1339] <... futex resumed>) = ? [pid 1333] <... exit_group resumed>) = ? [pid 1357] <... set_robust_list resumed>) = 0 [pid 1339] +++ exited with 0 +++ [pid 1338] +++ exited with 0 +++ [pid 1333] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1333, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1357] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1348] <... open resumed>) = 6 [pid 1355] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1357] <... prctl resumed>) = 0 [pid 1348] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1345] <... ioctl resumed>) = 0 [pid 1357] setpgid(0, 0 [pid 1348] <... futex resumed>) = 0 [pid 1357] <... setpgid resumed>) = 0 [pid 1348] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1357] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1345] close(3 [pid 1355] ioctl(4, LOOP_CLR_FD./strace-static-x86_64: Process 1358 attached [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1358] set_robust_list(0x7f6f98cc99e0, 24) = 0 [pid 1358] openat(-1, "/proc/self/exe", O_RDONLY) = 7 [pid 1358] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1340] <... futex resumed>) = 0 [ 27.430779][ T1338] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 27.457247][ T1346] loop3: detected capacity change from 0 to 2048 [pid 1358] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1357] <... openat resumed>) = 3 [pid 1345] <... close resumed>) = 0 [pid 1340] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... ioctl resumed>) = 0 [pid 1357] write(3, "1000", 4 [pid 1348] <... futex resumed>) = 0 [pid 1345] mkdir("./bus", 0777 [pid 1340] <... futex resumed>) = 1 [pid 407] close(3 [pid 1357] <... write resumed>) = 4 [pid 1348] sendfile(6, 7, NULL, 140737974943952 [pid 1345] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1340] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1356 attached [pid 1357] close(3 [pid 1345] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1357] <... close resumed>) = 0 [pid 1346] <... ioctl resumed>) = 0 [pid 1346] close(4) = 0 [pid 1346] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1346] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1356] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1356] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1356] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1352] <... futex resumed>) = 0 [pid 1352] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1352] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1356] <... futex resumed>) = 1 [pid 1356] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1356] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1352] <... futex resumed>) = 0 [pid 1352] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1352] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1356] <... futex resumed>) = 1 [pid 1356] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1357] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1357] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1357] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1357] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1361], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1361 [pid 1357] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1357] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1357] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 407] <... close resumed>) = 0 [pid 1357] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1357] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1357] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1362], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1362 [pid 1357] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1357] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1348] <... sendfile resumed>) = 1048576 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1363 attached ./strace-static-x86_64: Process 1362 attached ./strace-static-x86_64: Process 1361 attached [pid 1348] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1363] set_robust_list(0x5555564066e0, 24 [pid 1362] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1361] set_robust_list(0x7f6fa100b9e0, 24 [pid 1348] <... futex resumed>) = 1 [pid 1340] <... futex resumed>) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1363 [pid 1363] <... set_robust_list resumed>) = 0 [pid 1362] <... set_robust_list resumed>) = 0 [pid 1361] <... set_robust_list resumed>) = 0 [pid 1348] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1363] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1362] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1361] memfd_create("syzkaller", 0 [pid 1363] <... prctl resumed>) = 0 [pid 1361] <... memfd_create resumed>) = 4 [pid 1363] setpgid(0, 0 [pid 1361] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1363] <... setpgid resumed>) = 0 [pid 1363] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1361] <... mmap resumed>) = 0x7f6f98bca000 [pid 1363] <... openat resumed>) = 3 [pid 1361] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1355] <... ioctl resumed>) = 0 [pid 1363] write(3, "1000", 4) = 4 [pid 1363] close(3) = 0 [pid 1363] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1363] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1363] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1363] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1364], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1364 [pid 1363] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1363] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1363] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1363] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1363] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1347] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1363] <... clone resumed>, parent_tid=[1365], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1365 [pid 1347] ioctl(5, LOOP_CLR_FD [pid 1363] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1362] <... open resumed>) = 3 [pid 1356] <... open resumed>) = 6 [pid 1363] <... futex resumed>) = 0 [pid 1362] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1356] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1363] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1362] <... futex resumed>) = 1 [pid 1355] ioctl(4, LOOP_SET_FD, 3 [pid 1362] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1365 attached [pid 1365] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1365] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1361] <... write resumed>) = 1048576 [pid 1361] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1361] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 1361] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1361] ioctl(5, LOOP_CLR_FD) = 0 [pid 1345] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1345] ioctl(5, LOOP_CLR_FD) = 0 [pid 1345] close(5) = 0 [pid 1345] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1345] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1364 attached [pid 1364] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1364] memfd_create("syzkaller", 0) = 4 [pid 1364] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1340] exit_group(0 [pid 1348] <... futex resumed>) = ? [pid 1340] <... exit_group resumed>) = ? [pid 1361] ioctl(5, LOOP_SET_FD, 4 [pid 1348] +++ exited with 0 +++ [pid 1358] <... futex resumed>) = ? [pid 1358] +++ exited with 0 +++ [pid 1357] <... futex resumed>) = 0 [pid 1361] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1357] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1361] close(5) = 0 [pid 1361] close(4 [pid 1362] <... futex resumed>) = 0 [pid 1361] <... close resumed>) = 0 [pid 1357] <... futex resumed>) = 1 [pid 1356] <... futex resumed>) = 1 [pid 1352] <... futex resumed>) = 0 [pid 1362] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1352] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1362] <... mount resumed>) = 0 [pid 1352] <... futex resumed>) = 0 [pid 1362] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1352] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1362] <... futex resumed>) = 0 [pid 1362] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1361] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1361] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1345] <... futex resumed>) = ? [pid 1357] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 1356] openat(-1, "/proc/self/exe", O_RDONLY [pid 1357] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1361] <... futex resumed>) = 0 [pid 1357] <... futex resumed>) = 1 [pid 1361] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1356] <... openat resumed>) = 7 [pid 1361] <... open resumed>) = 4 [pid 1357] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1361] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1357] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1361] <... futex resumed>) = 0 [pid 1361] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1357] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1356] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1361] <... futex resumed>) = 0 [pid 1357] <... futex resumed>) = 1 [pid 1361] openat(-1, "/proc/self/exe", O_RDONLY [pid 1357] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1356] <... futex resumed>) = 1 [pid 1352] <... futex resumed>) = 0 [pid 1361] <... openat resumed>) = 5 [pid 1356] sendfile(6, 7, NULL, 140737974943952 [pid 1352] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1361] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1352] <... futex resumed>) = 0 [pid 1361] <... futex resumed>) = 1 [pid 1352] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1361] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1357] <... futex resumed>) = 0 [pid 1356] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1357] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1356] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1357] <... futex resumed>) = 1 [pid 1361] <... futex resumed>) = 0 [pid 1357] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1356] <... futex resumed>) = 1 [pid 1352] <... futex resumed>) = 0 [pid 1361] sendfile(4, 5, NULL, 140737974943952 [pid 1356] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1345] +++ exited with 0 +++ [pid 1340] +++ exited with 0 +++ [pid 1364] <... mmap resumed>) = 0x7f6f98bca000 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1340, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 409] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1367 [pid 1347] <... ioctl resumed>) = 0 [pid 1347] close(5 [pid 1361] <... sendfile resumed>) = 1048576 [pid 1347] <... close resumed>) = 0 [pid 1361] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1347] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1361] <... futex resumed>) = 1 [pid 1357] <... futex resumed>) = 0 [pid 1347] <... futex resumed>) = 0 [pid 1361] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1347] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1344] exit_group(0 [pid 1350] <... futex resumed>) = ? [pid 1347] <... futex resumed>) = ? [pid 1344] <... exit_group resumed>) = ? [pid 1350] +++ exited with 0 +++ [pid 1347] +++ exited with 0 +++ [pid 1344] +++ exited with 0 +++ [pid 1357] exit_group(0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1344, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1362] <... futex resumed>) = ? [pid 1361] <... futex resumed>) = ? [pid 1357] <... exit_group resumed>) = ? [pid 1362] +++ exited with 0 +++ [pid 1361] +++ exited with 0 +++ [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1364] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 408] <... openat resumed>) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 408] close(3) = 0 ./strace-static-x86_64: Process 1367 attached [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1367] set_robust_list(0x5555564066e0, 24) = 0 [pid 1367] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1367] setpgid(0, 0 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1368 [pid 1367] <... setpgid resumed>) = 0 [pid 1367] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1367] write(3, "1000", 4) = 4 [pid 1367] close(3) = 0 [pid 1367] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1367] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1365] <... open resumed>) = 3 [pid 1357] +++ exited with 0 +++ [pid 1355] <... ioctl resumed>) = 0 [pid 1367] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1365] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1367] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1365] <... futex resumed>) = 1 [pid 1363] <... futex resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1357, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1367] <... mprotect resumed>) = 0 [pid 1365] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1363] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1355] close(3 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 1367] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1365] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1363] <... futex resumed>) = 0 [pid 412] <... restart_syscall resumed>) = 0 [pid 1365] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1363] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1355] <... close resumed>) = 0 [pid 1367] <... clone resumed>, parent_tid=[1370], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1370 [pid 1365] <... mount resumed>) = 0 [pid 1355] mkdir("./bus", 0777./strace-static-x86_64: Process 1368 attached [pid 1367] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1365] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1368] set_robust_list(0x5555564066e0, 24 [pid 1367] <... futex resumed>) = 0 [pid 1365] <... futex resumed>) = 1 [pid 1363] <... futex resumed>) = 0 [pid 1355] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 412] <... openat resumed>) = 3 [pid 1367] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1365] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1363] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1355] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 412] ioctl(3, LOOP_CLR_FD [pid 1367] <... futex resumed>) = 0 [pid 1365] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1363] <... futex resumed>) = 0 [pid 412] <... ioctl resumed>) = 0 [pid 1368] <... set_robust_list resumed>) = 0 [pid 1367] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1365] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1363] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] close(3 [pid 1368] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1367] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1365] <... open resumed>) = 5 [pid 412] <... close resumed>) = 0 [pid 1368] <... prctl resumed>) = 0 [pid 1367] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1365] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1367] <... mprotect resumed>) = 0 [pid 1365] <... futex resumed>) = 1 [pid 1363] <... futex resumed>) = 0 [pid 1367] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1365] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1364] <... write resumed>) = 1048576 [pid 1363] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1368] setpgid(0, 0 [pid 1365] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1364] munmap(0x7f6f98bca000, 1048576 [pid 1363] <... futex resumed>) = 0 [pid 1368] <... setpgid resumed>) = 0 [pid 1367] <... clone resumed>, parent_tid=[1371], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1371 [pid 1365] openat(-1, "/proc/self/exe", O_RDONLY [pid 1364] <... munmap resumed>) = 0 [pid 1363] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1367] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1365] <... openat resumed>) = 6 [pid 1364] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1372 [pid 1368] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1367] <... futex resumed>) = 0 [pid 1365] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1364] <... openat resumed>) = 7 [pid 1368] <... openat resumed>) = 3 [pid 1367] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1365] <... futex resumed>) = 1 [pid 1364] ioctl(7, LOOP_SET_FD, 4 [pid 1363] <... futex resumed>) = 0 [pid 1368] write(3, "1000", 4 [pid 1365] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1363] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1365] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1363] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1370 attached [pid 1368] <... write resumed>) = 4 [pid 1365] sendfile(5, 6, NULL, 140737974943952 [pid 1363] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1372 attached ./strace-static-x86_64: Process 1371 attached [pid 1370] set_robust_list(0x7f6fa100b9e0, 24 [pid 1368] close(3 [ 27.504092][ T1347] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 27.521640][ T1345] EXT4-fs (loop2): VFS: Can't find ext4 filesystem [ 27.535814][ T1355] loop4: detected capacity change from 0 to 2048 [pid 1365] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1372] set_robust_list(0x5555564066e0, 24 [pid 1371] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1368] <... close resumed>) = 0 [pid 1372] <... set_robust_list resumed>) = 0 [pid 1371] <... set_robust_list resumed>) = 0 [pid 1368] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1372] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1371] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1368] <... futex resumed>) = 0 [pid 1372] <... prctl resumed>) = 0 [pid 1368] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1372] setpgid(0, 0 [pid 1368] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1372] <... setpgid resumed>) = 0 [pid 1368] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1372] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1368] <... mprotect resumed>) = 0 [pid 1372] <... openat resumed>) = 3 [pid 1368] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1372] write(3, "1000", 4) = 4 [pid 1368] <... clone resumed>, parent_tid=[1375], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1375 [pid 1372] close(3 [pid 1368] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1372] <... close resumed>) = 0 [pid 1368] <... futex resumed>) = 0 [pid 1372] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1368] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1372] <... futex resumed>) = 0 [pid 1368] <... futex resumed>) = 0 [pid 1372] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1368] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1372] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1368] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1372] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1368] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1372] <... mprotect resumed>) = 0 [pid 1368] <... mprotect resumed>) = 0 [pid 1372] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1368] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1372] <... clone resumed>, parent_tid=[1376], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1376 [pid 1368] <... clone resumed>, parent_tid=[1377], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1377 [pid 1372] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1368] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1372] <... futex resumed>) = 0 [pid 1368] <... futex resumed>) = 0 [pid 1372] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1368] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1372] <... futex resumed>) = 0 [pid 1372] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1372] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1365] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1372] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1371] <... open resumed>) = 3 [pid 1365] <... futex resumed>) = 1 [pid 1364] <... ioctl resumed>) = 0 [pid 1363] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1377 attached ./strace-static-x86_64: Process 1376 attached ./strace-static-x86_64: Process 1375 attached [pid 1371] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1370] <... set_robust_list resumed>) = 0 [pid 1365] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1364] close(4 [pid 1372] <... clone resumed>, parent_tid=[1378], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1378 [pid 1371] <... futex resumed>) = 1 [pid 1367] <... futex resumed>) = 0 [pid 1377] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1376] set_robust_list(0x7f6fa100b9e0, 24 [pid 1375] set_robust_list(0x7f6fa100b9e0, 24 [pid 1372] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1371] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1370] memfd_create("syzkaller", 0 [pid 1367] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1364] <... close resumed>) = 0 [pid 1377] <... set_robust_list resumed>) = 0 [pid 1376] <... set_robust_list resumed>) = 0 [pid 1375] <... set_robust_list resumed>) = 0 [pid 1372] <... futex resumed>) = 0 [pid 1371] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1370] <... memfd_create resumed>) = 4 [pid 1367] <... futex resumed>) = 0 [pid 1364] mkdir("./bus", 0777 [pid 1377] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1376] memfd_create("syzkaller", 0 [pid 1375] memfd_create("syzkaller", 0 [pid 1372] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1371] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1370] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1367] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1364] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1377] <... open resumed>) = 3 [pid 1376] <... memfd_create resumed>) = 3 [pid 1375] <... memfd_create resumed>) = 4 [pid 1371] <... mount resumed>) = 0 [pid 1370] <... mmap resumed>) = 0x7f6f98bca000 [pid 1364] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1377] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1376] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0./strace-static-x86_64: Process 1378 attached [pid 1378] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1378] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1378] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1372] <... futex resumed>) = 0 [pid 1378] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1372] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1378] <... mount resumed>) = 0 [pid 1372] <... futex resumed>) = 0 [pid 1378] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1372] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1378] <... futex resumed>) = 0 [pid 1372] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1378] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1372] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1378] <... open resumed>) = 5 [pid 1372] <... futex resumed>) = 0 [pid 1378] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1372] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1378] <... futex resumed>) = 0 [pid 1372] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1378] openat(-1, "/proc/self/exe", O_RDONLY [pid 1372] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1378] <... openat resumed>) = 6 [pid 1372] <... futex resumed>) = 0 [pid 1371] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1370] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1378] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1372] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1371] <... futex resumed>) = 1 [pid 1367] <... futex resumed>) = 0 [pid 1378] <... futex resumed>) = 0 [pid 1377] <... futex resumed>) = 1 [pid 1376] <... mmap resumed>) = 0x7f6f98bca000 [pid 1375] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1372] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1371] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1370] <... write resumed>) = 1048576 [pid 1368] <... futex resumed>) = 0 [pid 1367] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1378] sendfile(5, 6, NULL, 140737974943952 [pid 1377] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1376] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1372] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1371] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1370] munmap(0x7f6f98bca000, 1048576 [pid 1368] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1367] <... futex resumed>) = 0 [pid 1377] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1376] <... write resumed>) = 1048576 [pid 1375] <... mmap resumed>) = 0x7f6f98bca000 [pid 1372] <... futex resumed>) = 0 [pid 1371] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1370] <... munmap resumed>) = 0 [pid 1368] <... futex resumed>) = 0 [pid 1367] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1377] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1376] munmap(0x7f6f98bca000, 1048576 [pid 1372] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1371] <... open resumed>) = 5 [pid 1370] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1368] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1377] <... mount resumed>) = 0 [pid 1376] <... munmap resumed>) = 0 [pid 1371] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1370] <... openat resumed>) = 6 [pid 1377] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1376] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1371] <... futex resumed>) = 1 [pid 1370] ioctl(6, LOOP_SET_FD, 4 [pid 1367] <... futex resumed>) = 0 [pid 1377] <... futex resumed>) = 1 [pid 1376] <... openat resumed>) = 7 [pid 1371] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1370] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1368] <... futex resumed>) = 0 [pid 1367] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1377] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1376] ioctl(7, LOOP_SET_FD, 3 [pid 1371] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1370] ioctl(6, LOOP_CLR_FD [pid 1368] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1367] <... futex resumed>) = 0 [pid 1377] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1376] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1371] openat(-1, "/proc/self/exe", O_RDONLY [pid 1370] <... ioctl resumed>) = 0 [pid 1368] <... futex resumed>) = 0 [pid 1367] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1377] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1376] ioctl(7, LOOP_CLR_FD [pid 1371] <... openat resumed>) = 7 [pid 1368] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1377] <... open resumed>) = 5 [pid 1376] <... ioctl resumed>) = 0 [pid 1371] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1377] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1371] <... futex resumed>) = 1 [pid 1367] <... futex resumed>) = 0 [pid 1377] <... futex resumed>) = 1 [pid 1371] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1368] <... futex resumed>) = 0 [pid 1367] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1377] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1371] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1368] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1367] <... futex resumed>) = 0 [pid 1377] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1371] sendfile(5, 7, NULL, 140737974943952 [pid 1368] <... futex resumed>) = 0 [pid 1367] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1377] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1370] ioctl(6, LOOP_SET_FD, 4 [pid 1368] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1377] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1376] ioctl(7, LOOP_SET_FD, 3 [pid 1370] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1377] <... futex resumed>) = 0 [pid 1376] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1370] close(6 [pid 1368] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1377] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1376] close(7 [pid 1370] <... close resumed>) = 0 [pid 1368] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1377] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1376] <... close resumed>) = 0 [pid 1370] close(4 [pid 1368] <... futex resumed>) = 0 [pid 1377] sendfile(5, 6, NULL, 140737974943952 [ 27.579300][ T1346] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 27.589444][ T1364] loop0: detected capacity change from 0 to 2048 [ 27.603833][ T1355] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1376] close(3 [pid 1370] <... close resumed>) = 0 [pid 1368] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1377] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1376] <... close resumed>) = 0 [pid 1371] <... sendfile resumed>) = 1048576 [pid 1370] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1377] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1376] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1371] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1370] <... futex resumed>) = 0 [pid 1377] <... futex resumed>) = 0 [pid 1376] <... futex resumed>) = 0 [pid 1371] <... futex resumed>) = 1 [pid 1370] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1368] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1367] <... futex resumed>) = 0 [pid 1377] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1376] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1371] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1367] exit_group(0 [pid 1371] <... futex resumed>) = ? [pid 1370] <... futex resumed>) = ? [pid 1367] <... exit_group resumed>) = ? [pid 1371] +++ exited with 0 +++ [pid 1370] +++ exited with 0 +++ [pid 1367] +++ exited with 0 +++ [pid 1375] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1375] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1375] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 7 [pid 1375] ioctl(7, LOOP_SET_FD, 4 [pid 1346] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1346] ioctl(7, LOOP_CLR_FD) = 0 [pid 1346] close(7) = 0 [pid 1346] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1346] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1375] <... ioctl resumed>) = 0 [pid 1375] close(4) = 0 [pid 1375] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1375] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1378] <... sendfile resumed>) = 1048576 [pid 1378] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1378] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1372] <... futex resumed>) = 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1367, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1372] exit_group(0 [pid 1343] exit_group(0 [pid 1372] <... exit_group resumed>) = ? [pid 1376] <... futex resumed>) = ? [pid 1376] +++ exited with 0 +++ [pid 1343] <... exit_group resumed>) = ? [pid 1346] <... futex resumed>) = -1 (errno 18446744073709551555) [pid 1349] <... futex resumed>) = ? [pid 1349] +++ exited with 0 +++ [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1381 [pid 1378] <... futex resumed>) = ? ./strace-static-x86_64: Process 1381 attached [pid 1381] set_robust_list(0x5555564066e0, 24 [pid 1378] +++ exited with 0 +++ [pid 1372] +++ exited with 0 +++ [pid 1355] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1372, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1355] ioctl(4, LOOP_CLR_FD [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 1355] <... ioctl resumed>) = 0 [pid 1355] close(4 [pid 412] <... restart_syscall resumed>) = 0 [pid 1381] <... set_robust_list resumed>) = 0 [pid 1355] <... close resumed>) = 0 [pid 1364] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1355] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1381] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1364] ioctl(7, LOOP_CLR_FD [pid 1355] <... futex resumed>) = 0 [pid 1381] <... prctl resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 1364] <... ioctl resumed>) = 0 [pid 1364] close(7) = 0 [pid 1364] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1364] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1352] exit_group(0 [pid 1381] setpgid(0, 0 [pid 1363] exit_group(0 [pid 1356] <... futex resumed>) = ? [pid 1352] <... exit_group resumed>) = ? [pid 412] ioctl(3, LOOP_CLR_FD [pid 1355] ioctl(3, LOOP_CLR_FD) = ? [pid 1381] <... setpgid resumed>) = 0 [pid 1365] <... futex resumed>) = ? [pid 1364] <... futex resumed>) = ? [pid 1363] <... exit_group resumed>) = ? [pid 1356] +++ exited with 0 +++ [pid 412] <... ioctl resumed>) = 0 [pid 1365] +++ exited with 0 +++ [pid 1364] +++ exited with 0 +++ [pid 1381] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1381] write(3, "1000", 4) = 4 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1381] close(3) = 0 [pid 1381] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1381] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1381] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1382 [pid 1381] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1383 attached , parent_tid=[1383], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1383 [pid 1383] set_robust_list(0x7f6fa100b9e0, 24 [pid 1381] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1381] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1381] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1381] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1381] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1383] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 1384 attached [pid 1381] <... clone resumed>, parent_tid=[1384], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1384 [pid 1381] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1381] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1382 attached [pid 1382] set_robust_list(0x5555564066e0, 24) = 0 [pid 1383] memfd_create("syzkaller", 0 [pid 1382] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1384] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1383] <... memfd_create resumed>) = 3 [pid 1382] setpgid(0, 0) = 0 [pid 1384] <... set_robust_list resumed>) = 0 [pid 1383] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1382] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1384] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1383] <... mmap resumed>) = 0x7f6f98bca000 [pid 1382] <... openat resumed>) = 3 [pid 1382] write(3, "1000", 4) = 4 [pid 1382] close(3) = 0 [pid 1382] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1382] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1382] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1382] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1386], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1386 [pid 1382] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1382] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1382] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1382] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1382] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1387], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1387 [pid 1382] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1382] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1387 attached [pid 1387] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1387] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1387] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1382] <... futex resumed>) = 0 [pid 1382] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1382] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1387] <... futex resumed>) = 1 [pid 1387] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1387] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1382] <... futex resumed>) = 0 [pid 1382] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1382] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1387] <... futex resumed>) = 1 [pid 1387] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1387] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1382] <... futex resumed>) = 0 [pid 1382] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1382] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1387] <... futex resumed>) = 1 [pid 1387] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1387] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1382] <... futex resumed>) = 0 [pid 1382] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1382] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1387] <... futex resumed>) = 1 [pid 1387] sendfile(4, 5, NULL, 140737974943952./strace-static-x86_64: Process 1386 attached [pid 1386] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1386] memfd_create("syzkaller", 0) = 6 [pid 1386] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1383] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1384] <... open resumed>) = 4 [pid 1384] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1381] <... futex resumed>) = 0 [pid 1381] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1381] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1384] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1384] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1381] <... futex resumed>) = 0 [pid 1381] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 27.660873][ T1375] loop1: detected capacity change from 0 to 2048 [ 27.666800][ T1364] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1381] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1386] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1384] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1383] <... write resumed>) = 1048576 [pid 1386] <... write resumed>) = 1048576 [pid 1386] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1386] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 1386] ioctl(7, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 1386] ioctl(7, LOOP_CLR_FD) = 0 [pid 1383] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1383] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1386] ioctl(7, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 1386] close(7) = 0 [pid 1386] close(6) = 0 [pid 1386] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1386] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1346] +++ exited with 0 +++ [pid 1343] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1343, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1387] <... sendfile resumed>) = 1048576 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1389 [pid 1387] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1382] <... futex resumed>) = 0 [pid 1387] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1382] exit_group(0 [pid 1387] <... futex resumed>) = ? [pid 1382] <... exit_group resumed>) = ? [pid 1355] +++ exited with 0 +++ [pid 1352] +++ exited with 0 +++ [pid 1387] +++ exited with 0 +++ ./strace-static-x86_64: Process 1389 attached [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1352, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1389] set_robust_list(0x5555564066e0, 24) = 0 [pid 1389] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1389] setpgid(0, 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1384] <... open resumed>) = 5 [pid 411] <... openat resumed>) = 3 [pid 1384] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1384] <... futex resumed>) = 1 [pid 1381] <... futex resumed>) = 0 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1384] openat(-1, "/proc/self/exe", O_RDONLY [pid 1381] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] close(3 [pid 1389] <... setpgid resumed>) = 0 [pid 1381] <... futex resumed>) = 0 [pid 1363] +++ exited with 0 +++ [pid 411] <... close resumed>) = 0 [pid 1389] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1384] <... openat resumed>) = 7 [pid 1381] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1363, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- ./strace-static-x86_64: Process 1390 attached [pid 1389] <... openat resumed>) = 3 [pid 1384] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1389] write(3, "1000", 4 [pid 1384] <... futex resumed>) = 1 [pid 1381] <... futex resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1390 [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1390] set_robust_list(0x5555564066e0, 24 [pid 1389] <... write resumed>) = 4 [pid 1384] sendfile(5, 7, NULL, 140737974943952 [pid 1381] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... restart_syscall resumed>) = 0 [pid 1390] <... set_robust_list resumed>) = 0 [pid 1389] close(3 [pid 1384] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1381] <... futex resumed>) = 0 [pid 1390] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1389] <... close resumed>) = 0 [pid 1384] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1381] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1384] <... futex resumed>) = 0 [pid 1381] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1383] <... openat resumed>) = 6 [pid 1383] ioctl(6, LOOP_SET_FD, 3 [pid 1390] <... prctl resumed>) = 0 [pid 1389] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1384] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1375] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1383] <... ioctl resumed>) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1391 [pid 1383] close(3) = 0 [pid 1375] ioctl(7, LOOP_CLR_FD) = 0 [pid 1383] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1383] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1389] <... futex resumed>) = 0 [pid 1375] close(7 [pid 1389] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1375] <... close resumed>) = 0 [pid 1390] setpgid(0, 0 [pid 1389] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1386] <... futex resumed>) = ? [pid 1375] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1368] exit_group(0 [pid 1377] <... futex resumed>) = ? [pid 1368] <... exit_group resumed>) = ? [pid 1377] +++ exited with 0 +++ ./strace-static-x86_64: Process 1391 attached [pid 1391] set_robust_list(0x5555564066e0, 24) = 0 [pid 1391] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1391] setpgid(0, 0) = 0 [pid 1391] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1391] write(3, "1000", 4 [pid 1389] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1391] <... write resumed>) = 4 [pid 1390] <... setpgid resumed>) = 0 [pid 1389] <... mprotect resumed>) = 0 [pid 1390] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1389] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1391] close(3) = 0 [pid 1391] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1391] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1391] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1389] <... clone resumed>, parent_tid=[1393], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1393 [pid 1389] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1391] <... mprotect resumed>) = 0 [pid 1389] <... futex resumed>) = 0 [pid 1391] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1390] <... openat resumed>) = 3 [pid 1389] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1389] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1390] write(3, "1000", 4 [pid 1389] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1389] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1390] <... write resumed>) = 4 [pid 1389] <... mprotect resumed>) = 0 [pid 1391] <... clone resumed>, parent_tid=[1394], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1394 [pid 1391] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1390] close(3 [pid 1389] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1391] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1391] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1391] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1390] <... close resumed>) = 0 [pid 1389] <... clone resumed>, parent_tid=[1395], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1395 [pid 1389] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1390] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1389] <... futex resumed>) = 0 [pid 1389] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1391] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1396], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1396 [pid 1390] <... futex resumed>) = 0 [pid 1391] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1391] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1393 attached [pid 1393] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1393] memfd_create("syzkaller", 0) = 3 [pid 1393] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1390] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1393] <... mmap resumed>) = 0x7f6f98bca000 [pid 1390] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1390] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1397], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1397 [pid 1390] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1390] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1390] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1390] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1390] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1398], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1398 [pid 1390] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1390] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1398 attached ./strace-static-x86_64: Process 1397 attached ./strace-static-x86_64: Process 1395 attached [pid 1395] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1398] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1397] set_robust_list(0x7f6fa100b9e0, 24 [pid 1395] <... set_robust_list resumed>) = 0 [pid 1398] <... set_robust_list resumed>) = 0 [pid 1397] <... set_robust_list resumed>) = 0 [pid 1395] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1396 attached [pid 1396] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1396] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1395] <... open resumed>) = 4 [pid 1398] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1397] memfd_create("syzkaller", 0 [pid 1395] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1389] <... futex resumed>) = 0 [pid 1395] <... futex resumed>) = 1 [pid 1389] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1389] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1398] <... open resumed>) = 3 [pid 1397] <... memfd_create resumed>) = 4 [pid 1396] <... open resumed>) = 3 [pid 1395] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1398] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1397] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1395] <... mount resumed>) = 0 [pid 1398] <... futex resumed>) = 1 [pid 1397] <... mmap resumed>) = 0x7f6f98bca000 [pid 1395] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1390] <... futex resumed>) = 0 [pid 1390] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1395] <... futex resumed>) = 1 [pid 1390] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1389] <... futex resumed>) = 0 [pid 1395] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1389] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1395] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1389] <... futex resumed>) = 0 [pid 1389] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1395] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1396] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1391] <... futex resumed>) = 0 [pid 1391] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1391] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1398] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1395] <... open resumed>) = 5 [pid 1396] <... futex resumed>) = 1 [pid 1396] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1395] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1398] <... mount resumed>) = 0 [pid 1395] <... futex resumed>) = 1 [pid 1389] <... futex resumed>) = 0 [pid 1398] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1395] openat(-1, "/proc/self/exe", O_RDONLY [pid 1389] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1398] <... futex resumed>) = 1 [pid 1396] <... mount resumed>) = 0 [pid 1395] <... openat resumed>) = 6 [pid 1390] <... futex resumed>) = 0 [pid 1389] <... futex resumed>) = 0 [pid 1398] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1396] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1395] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1390] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1389] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1394 attached [pid 1398] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1396] <... futex resumed>) = 1 [pid 1395] <... futex resumed>) = 0 [pid 1391] <... futex resumed>) = 0 [pid 1390] <... futex resumed>) = 0 [pid 1389] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1398] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1396] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1395] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1394] set_robust_list(0x7f6fa100b9e0, 24 [ 27.710030][ T1375] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 27.743822][ T1383] loop2: detected capacity change from 0 to 2048 [pid 1391] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1390] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1389] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1397] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1395] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1394] <... set_robust_list resumed>) = 0 [pid 1391] <... futex resumed>) = 0 [pid 1386] +++ exited with 0 +++ [pid 1382] +++ exited with 0 +++ [pid 1375] +++ exited with 0 +++ [pid 1368] +++ exited with 0 +++ [pid 1393] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1398] <... open resumed>) = 5 [pid 1395] sendfile(5, 6, NULL, 140737974943952 [pid 1394] memfd_create("syzkaller", 0 [pid 1391] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1389] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1368, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1398] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1395] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1394] <... memfd_create resumed>) = 5 [pid 1389] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1382, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1396] <... open resumed>) = 4 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1398] <... futex resumed>) = 1 [pid 1395] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1394] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1393] <... write resumed>) = 1048576 [pid 1390] <... futex resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 408] <... restart_syscall resumed>) = 0 [pid 1394] <... mmap resumed>) = 0x7f6f98bca000 [pid 412] <... openat resumed>) = 3 [pid 1398] openat(-1, "/proc/self/exe", O_RDONLY [pid 1396] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1395] <... futex resumed>) = 1 [pid 1394] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1390] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1389] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1395] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1390] <... futex resumed>) = 0 [pid 412] <... ioctl resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1398] <... openat resumed>) = 6 [pid 1396] <... futex resumed>) = 1 [pid 1391] <... futex resumed>) = 0 [pid 1390] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] close(3 [pid 408] <... openat resumed>) = 3 [pid 1398] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1396] openat(-1, "/proc/self/exe", O_RDONLY [pid 1391] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1390] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 412] <... close resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1398] <... futex resumed>) = 0 [pid 1396] <... openat resumed>) = 6 [pid 1391] <... futex resumed>) = 0 [pid 1390] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1398] sendfile(5, 6, NULL, 140737974943952 [pid 1396] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1391] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1390] <... futex resumed>) = 0 [pid 408] close(3 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1400 [pid 1390] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] <... close resumed>) = 0 [pid 1398] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1396] <... futex resumed>) = 0 [pid 1391] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1398] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1396] sendfile(4, 6, NULL, 140737974943952 [pid 1391] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1398] <... futex resumed>) = 1 [pid 1396] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1393] munmap(0x7f6f98bca000, 1048576 [pid 1391] <... futex resumed>) = 0 [pid 1390] <... futex resumed>) = 0 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1401 [pid 1398] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1396] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1393] <... munmap resumed>) = 0 [pid 1391] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1393] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 7 [pid 1393] ioctl(7, LOOP_SET_FD, 3 [pid 1391] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 1401 attached ./strace-static-x86_64: Process 1400 attached [pid 1397] <... write resumed>) = 1048576 [pid 1396] <... futex resumed>) = 0 [pid 1401] set_robust_list(0x5555564066e0, 24 [pid 1396] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1401] <... set_robust_list resumed>) = 0 [pid 1400] set_robust_list(0x5555564066e0, 24 [pid 1397] munmap(0x7f6f98bca000, 1048576 [pid 1401] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1400] <... set_robust_list resumed>) = 0 [pid 1397] <... munmap resumed>) = 0 [pid 1401] setpgid(0, 0 [pid 1400] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1397] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1401] <... setpgid resumed>) = 0 [pid 1400] <... prctl resumed>) = 0 [pid 1394] <... write resumed>) = 1048576 [pid 1393] <... ioctl resumed>) = 0 [pid 1401] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1400] setpgid(0, 0 [pid 1397] <... openat resumed>) = 7 [pid 1394] munmap(0x7f6f98bca000, 1048576 [pid 1383] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1401] <... openat resumed>) = 3 [pid 1400] <... setpgid resumed>) = 0 [pid 1397] ioctl(7, LOOP_SET_FD, 4 [pid 1401] write(3, "1000", 4 [ 27.787622][ T1383] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 27.814484][ T1393] loop3: detected capacity change from 0 to 2048 [pid 1400] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1394] <... munmap resumed>) = 0 [pid 1383] ioctl(6, LOOP_CLR_FD [pid 1394] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1383] <... ioctl resumed>) = 0 [pid 1394] <... openat resumed>) = 7 [pid 1383] close(6 [pid 1394] ioctl(7, LOOP_SET_FD, 5 [pid 1383] <... close resumed>) = 0 [pid 1401] <... write resumed>) = 4 [pid 1400] <... openat resumed>) = 3 [pid 1397] <... ioctl resumed>) = 0 [pid 1393] close(3 [pid 1401] close(3 [pid 1400] write(3, "1000", 4 [pid 1401] <... close resumed>) = 0 [pid 1400] <... write resumed>) = 4 [pid 1393] <... close resumed>) = 0 [pid 1401] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1400] close(3 [pid 1397] close(4 [pid 1393] mkdir("./bus", 0777 [pid 1401] <... futex resumed>) = 0 [pid 1400] <... close resumed>) = 0 [pid 1397] <... close resumed>) = 0 [pid 1393] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1383] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1401] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1400] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1397] mkdir("./bus", 0777 [pid 1393] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1383] <... futex resumed>) = 0 [pid 1381] exit_group(0 [pid 1401] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1400] <... futex resumed>) = 0 [pid 1397] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1384] <... futex resumed>) = ? [pid 1381] <... exit_group resumed>) = ? [pid 1401] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1400] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1397] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1384] +++ exited with 0 +++ [pid 1383] +++ exited with 0 +++ [pid 1401] <... mprotect resumed>) = 0 [pid 1400] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1400] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1401] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1400] <... mprotect resumed>) = 0 [pid 1401] <... clone resumed>, parent_tid=[1403], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1403 [pid 1400] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1401] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1400] <... clone resumed>, parent_tid=[1404], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1404 ./strace-static-x86_64: Process 1404 attached ./strace-static-x86_64: Process 1403 attached [pid 1401] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1394] <... ioctl resumed>) = 0 [pid 1404] set_robust_list(0x7f6fa100b9e0, 24 [pid 1403] set_robust_list(0x7f6fa100b9e0, 24 [pid 1401] <... futex resumed>) = 0 [pid 1400] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1394] close(5 [pid 1404] <... set_robust_list resumed>) = 0 [pid 1403] <... set_robust_list resumed>) = 0 [pid 1401] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1400] <... futex resumed>) = 0 [pid 1394] <... close resumed>) = 0 [pid 1404] memfd_create("syzkaller", 0 [pid 1403] memfd_create("syzkaller", 0 [pid 1401] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1400] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1394] mkdir("./bus", 0777 [pid 1404] <... memfd_create resumed>) = 3 [pid 1403] <... memfd_create resumed>) = 3 [pid 1401] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1400] <... futex resumed>) = 0 [pid 1394] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1404] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1403] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1401] <... mprotect resumed>) = 0 [ 27.848236][ T1397] loop4: detected capacity change from 0 to 2048 [ 27.853265][ T1394] loop0: detected capacity change from 0 to 2048 [ 27.887420][ T1393] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1400] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1394] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1393] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1404] <... mmap resumed>) = 0x7f6f98beb000 [pid 1403] <... mmap resumed>) = 0x7f6f98bca000 [pid 1401] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1400] <... mmap resumed>) = 0x7f6f98bca000 [pid 1393] ioctl(7, LOOP_CLR_FD) = 0 [pid 1393] close(7) = 0 [pid 1393] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1393] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1389] exit_group(0 [pid 1381] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1381, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 409] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 1403] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1400] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD [pid 1404] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1403] <... write resumed>) = 1048576 [pid 1401] <... clone resumed>, parent_tid=[1408], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1408 [pid 1400] <... mprotect resumed>) = 0 [pid 1395] <... futex resumed>) = ? [pid 1393] <... futex resumed>) = ? [pid 1389] <... exit_group resumed>) = ? [pid 409] <... ioctl resumed>) = 0 [pid 1404] <... write resumed>) = 1048576 [pid 1403] munmap(0x7f6f98bca000, 1048576 [pid 1401] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1400] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1395] +++ exited with 0 +++ [pid 1393] +++ exited with 0 +++ [pid 1389] +++ exited with 0 +++ [pid 1404] munmap(0x7f6f98beb000, 1048576 [pid 1403] <... munmap resumed>) = 0 [pid 1401] <... futex resumed>) = 0 [pid 1404] <... munmap resumed>) = 0 [pid 1403] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1401] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1400] <... clone resumed>, parent_tid=[1410], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1410 [pid 1404] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1403] <... openat resumed>) = 4 [pid 1400] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1404] <... openat resumed>) = 4 [pid 1403] ioctl(4, LOOP_SET_FD, 3 [pid 1400] <... futex resumed>) = 0 [pid 1404] ioctl(4, LOOP_SET_FD, 3 [pid 1400] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] close(3 [pid 1397] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1389, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 409] <... close resumed>) = 0 ./strace-static-x86_64: Process 1408 attached [pid 1397] ioctl(7, LOOP_CLR_FD [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1408] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1408] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1408] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1401] <... futex resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1411 [pid 1408] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1401] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1408] <... mount resumed>) = 0 [pid 1401] <... futex resumed>) = 0 [pid 1408] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1401] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1408] <... futex resumed>) = 0 [pid 1401] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1408] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1401] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1401] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1410 attached [pid 1410] set_robust_list(0x7f6f98bea9e0, 24) = 0 [ 27.900595][ T1397] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 27.926706][ T1403] loop1: detected capacity change from 0 to 2048 [ 27.936279][ T1404] loop5: detected capacity change from 0 to 2048 [pid 1410] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1404] <... ioctl resumed>) = 0 [pid 1404] close(3) = 0 [pid 1404] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1404] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1403] <... ioctl resumed>) = 0 [pid 1403] close(3) = 0 [pid 1403] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1410] <... open resumed>) = 5 [pid 1408] <... open resumed>) = 6 [pid 1403] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1411 attached [pid 1411] set_robust_list(0x5555564066e0, 24 [pid 1408] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1411] <... set_robust_list resumed>) = 0 [pid 1411] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1408] <... futex resumed>) = 1 [pid 1401] <... futex resumed>) = 0 [pid 1401] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1408] openat(-1, "/proc/self/exe", O_RDONLY [pid 1401] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1408] <... openat resumed>) = 3 [pid 1408] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1411] <... prctl resumed>) = 0 [pid 1411] setpgid(0, 0) = 0 [pid 1411] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1408] <... futex resumed>) = 1 [pid 1401] <... futex resumed>) = 0 [pid 1411] <... openat resumed>) = 3 [pid 1401] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1408] sendfile(6, 3, NULL, 140737974943952 [pid 1401] <... futex resumed>) = 0 [pid 1411] write(3, "1000", 4 [pid 1401] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1411] <... write resumed>) = 4 [pid 1411] close(3) = 0 [pid 1411] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1411] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1411] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1411] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1413], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1413 [pid 1411] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1411] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1411] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1411] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1411] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1414], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1414 [pid 1411] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1411] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1413 attached [pid 1413] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1413] memfd_create("syzkaller", 0) = 3 [pid 1413] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1410] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... openat resumed>) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1415 ./strace-static-x86_64: Process 1415 attached [pid 1415] set_robust_list(0x5555564066e0, 24) = 0 [pid 1415] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1415] setpgid(0, 0) = 0 [pid 1415] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1413] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1415] <... openat resumed>) = 3 [pid 1415] write(3, "1000", 4) = 4 [pid 1415] close(3) = 0 [pid 1400] <... futex resumed>) = 0 [pid 1410] <... futex resumed>) = 1 [pid 1400] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1415] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1400] <... futex resumed>) = 0 [pid 1415] <... futex resumed>) = 0 [pid 1415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1400] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1410] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1415] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1415] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1418], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1418 [pid 1415] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1415] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1415] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1410] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1415] <... mprotect resumed>) = 0 [pid 1415] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1400] <... futex resumed>) = 0 [pid 1410] <... futex resumed>) = 1 [pid 1400] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1400] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1415] <... clone resumed>, parent_tid=[1419], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1419 [pid 1415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1410] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1410] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1400] <... futex resumed>) = 0 [pid 1400] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1410] openat(-1, "/proc/self/exe", O_RDONLY [pid 1400] <... futex resumed>) = 0 [pid 1400] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1410] <... openat resumed>) = 6 [pid 1410] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1400] <... futex resumed>) = 0 [pid 1400] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1400] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1413] <... write resumed>) = 1048576 [pid 1413] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1413] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 1413] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1413] ioctl(4, LOOP_CLR_FD) = 0 [pid 1410] sendfile(3, 6, NULL, 140737974943952 [pid 1413] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1413] close(4) = 0 [pid 1413] close(3) = 0 [pid 1413] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1413] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1414 attached [pid 1414] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1414] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1414] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1411] <... futex resumed>) = 0 [pid 1411] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1413] <... futex resumed>) = 0 [pid 1411] <... futex resumed>) = 1 [pid 1413] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1411] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1413] <... mount resumed>) = 0 [pid 1413] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1411] <... futex resumed>) = 0 [pid 1397] <... ioctl resumed>) = 0 [pid 1413] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1411] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1413] <... open resumed>) = 4 [pid 1411] <... futex resumed>) = 0 [pid 1413] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1411] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1413] <... futex resumed>) = 0 [pid 1411] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1413] openat(-1, "/proc/self/exe", O_RDONLY [pid 1411] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1413] <... openat resumed>) = 5 [pid 1411] <... futex resumed>) = 0 [pid 1413] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1411] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1413] <... futex resumed>) = 0 [pid 1411] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1413] sendfile(4, 5, NULL, 140737974943952 [pid 1411] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1411] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1414] <... futex resumed>) = 1 [ 27.951163][ T1394] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1414] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1413] <... sendfile resumed>) = 1048576 [pid 1408] <... sendfile resumed>) = 1048576 [pid 1413] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1411] <... futex resumed>) = 0 [pid 1413] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1411] exit_group(0) = ? [pid 1413] <... futex resumed>) = ? [pid 1414] <... futex resumed>) = ? [pid 1413] +++ exited with 0 +++ [pid 1408] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1401] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1414] +++ exited with 0 +++ [pid 1411] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1411, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1422 ./strace-static-x86_64: Process 1419 attached ./strace-static-x86_64: Process 1418 attached [pid 1418] set_robust_list(0x7f6fa100b9e0, 24 [pid 1419] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1397] close(7 [pid 1408] <... futex resumed>) = 0 [pid 1418] <... set_robust_list resumed>) = 0 [pid 1418] memfd_create("syzkaller", 0 [pid 1408] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1418] <... memfd_create resumed>) = 3 [pid 1418] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1415] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0}) = -1 ETIMEDOUT (Connection timed out) [pid 1419] <... set_robust_list resumed>) = 0 [pid 1418] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} [pid 1397] <... close resumed>) = 0 [pid 1415] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1415] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1400] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1419] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1418] <... write resumed>) = 1048576 [pid 1415] <... futex resumed>) = 0 [pid 1397] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1390] exit_group(0 [pid 1419] <... open resumed>) = 4 [pid 1397] <... futex resumed>) = 0 [pid 1390] <... exit_group resumed>) = ? [pid 1415] <... mmap resumed>) = 0x7f6f98ba9000 [pid 1398] <... futex resumed>) = ? [pid 1398] +++ exited with 0 +++ [pid 1415] mprotect(0x7f6f98baa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1415] clone(child_stack=0x7f6f98bc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1423 attached [pid 1419] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1410] <... sendfile resumed>) = 1048576 [pid 1397] +++ exited with 0 +++ [pid 1390] +++ exited with 0 +++ [pid 1418] munmap(0x7f6f98bca000, 1048576 [pid 1419] <... futex resumed>) = 0 [pid 1415] <... clone resumed>, parent_tid=[1423], tls=0x7f6f98bc9700, child_tidptr=0x7f6f98bc99d0) = 1423 [pid 1410] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1390, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [ 28.003500][ T1416] EXT4-fs warning (device loop5): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 28.018795][ T1417] EXT4-fs warning (device loop1): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 28.044055][ T1404] EXT4-fs (loop5): get root inode failed ./strace-static-x86_64: Process 1422 attached [pid 1415] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1410] <... futex resumed>) = 0 [pid 1419] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1423] set_robust_list(0x7f6f98bc99e0, 24 [pid 1418] <... munmap resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1424 ./strace-static-x86_64: Process 1424 attached [pid 1423] <... set_robust_list resumed>) = 0 [pid 1422] set_robust_list(0x5555564066e0, 24 [pid 1418] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1415] <... futex resumed>) = 0 [pid 1410] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1404] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1403] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1394] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1423] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1422] <... set_robust_list resumed>) = 0 [pid 1418] <... openat resumed>) = 5 [pid 1415] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1404] ioctl(4, LOOP_CLR_FD [pid 1403] ioctl(4, LOOP_CLR_FD [pid 1394] ioctl(7, LOOP_CLR_FD [pid 1423] <... mount resumed>) = 0 [pid 1422] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1418] ioctl(5, LOOP_SET_FD, 3 [pid 1404] <... ioctl resumed>) = 0 [pid 1394] <... ioctl resumed>) = 0 [pid 1424] set_robust_list(0x5555564066e0, 24) = 0 [pid 1424] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1424] setpgid(0, 0) = 0 [pid 1424] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1424] write(3, "1000", 4) = 4 [pid 1424] close(3) = 0 [pid 1424] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1424] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1424] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1424] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1425], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1425 [pid 1424] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1424] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1424] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1424] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1424] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1426], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1426 [pid 1424] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1424] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1426 attached ./strace-static-x86_64: Process 1425 attached [pid 1423] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1422] <... prctl resumed>) = 0 [pid 1418] <... ioctl resumed>) = 0 [pid 1404] close(4 [pid 1403] <... ioctl resumed>) = 0 [pid 1394] close(7 [pid 1423] <... futex resumed>) = 1 [pid 1422] setpgid(0, 0 [pid 1418] close(3 [pid 1415] <... futex resumed>) = 0 [pid 1404] <... close resumed>) = 0 [pid 1403] close(4 [pid 1394] <... close resumed>) = 0 [pid 1423] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1422] <... setpgid resumed>) = 0 [pid 1418] <... close resumed>) = 0 [pid 1415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1404] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1403] <... close resumed>) = 0 [pid 1394] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1422] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1419] <... futex resumed>) = 0 [pid 1418] mkdir("./bus", 0777 [pid 1415] <... futex resumed>) = 1 [pid 1404] <... futex resumed>) = 0 [pid 1403] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1394] <... futex resumed>) = 0 [pid 1422] <... openat resumed>) = 3 [pid 1419] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1404] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1394] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1391] exit_group(0 [pid 1401] exit_group(0 [pid 1400] exit_group(0 [pid 1408] <... futex resumed>) = ? [pid 1401] <... exit_group resumed>) = ? [pid 1400] <... exit_group resumed>) = ? [pid 1422] write(3, "1000", 4 [pid 1419] <... open resumed>) = 3 [pid 1418] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1410] <... futex resumed>) = ? [pid 1408] +++ exited with 0 +++ [pid 1404] <... futex resumed>) = ? [pid 1403] <... futex resumed>) = ? [pid 1396] <... futex resumed>) = ? [pid 1394] <... futex resumed>) = ? [pid 1391] <... exit_group resumed>) = ? [pid 1422] <... write resumed>) = 4 [pid 1419] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1410] +++ exited with 0 +++ [pid 1396] +++ exited with 0 +++ [pid 1394] +++ exited with 0 +++ [pid 1422] close(3 [pid 1419] <... futex resumed>) = 1 [pid 1415] <... futex resumed>) = 0 [pid 1391] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1391, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1426] set_robust_list(0x7f6fa0fea9e0, 24 [pid 407] <... restart_syscall resumed>) = 0 [pid 1426] <... set_robust_list resumed>) = 0 [pid 1422] <... close resumed>) = 0 [pid 1419] openat(-1, "/proc/self/exe", O_RDONLY [pid 1418] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1426] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1422] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1419] <... openat resumed>) = 6 [pid 1415] <... futex resumed>) = 0 [pid 1426] <... open resumed>) = 3 [pid 1422] <... futex resumed>) = 0 [pid 1419] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1426] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1422] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1419] <... futex resumed>) = 0 [pid 1415] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... openat resumed>) = 3 [pid 1426] <... futex resumed>) = 1 [pid 1424] <... futex resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1426] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1424] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1422] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1419] sendfile(3, 6, NULL, 140737974943952 [pid 1415] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... ioctl resumed>) = 0 [pid 1426] <... mount resumed>) = 0 [pid 1424] <... futex resumed>) = 0 [pid 1422] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 407] close(3 [pid 1426] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1424] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1415] <... futex resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1426] <... futex resumed>) = 0 [pid 1424] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1426] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1424] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1422] <... mprotect resumed>) = 0 [pid 1415] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1426] <... open resumed>) = 4 [pid 1424] <... futex resumed>) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1428 [pid 1426] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1424] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1422] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1426] <... futex resumed>) = 0 [pid 1424] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1426] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1424] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1426] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1424] <... futex resumed>) = 0 [pid 1426] openat(-1, "/proc/self/exe", O_RDONLY [pid 1424] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1422] <... clone resumed>, parent_tid=[1429], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1429 [pid 1426] <... openat resumed>) = 5 [pid 1426] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1425] set_robust_list(0x7f6fa100b9e0, 24 [pid 1426] <... futex resumed>) = 1 [pid 1425] <... set_robust_list resumed>) = 0 [pid 1424] <... futex resumed>) = 0 [pid 1426] sendfile(4, 5, NULL, 140737974943952 [pid 1425] memfd_create("syzkaller", 0 [pid 1424] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1422] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1426] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1425] <... memfd_create resumed>) = 6 [pid 1424] <... futex resumed>) = 0 [pid 1422] <... futex resumed>) = 0 [pid 1426] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1425] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1424] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1422] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1426] <... futex resumed>) = 0 [pid 1425] <... mmap resumed>) = 0x7f6f98bca000 [pid 1424] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1426] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1425] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1422] <... futex resumed>) = 0 [pid 1419] <... sendfile resumed>) = 1048576 [pid 1422] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1419] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1422] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1422] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1419] <... futex resumed>) = 1 [pid 1415] <... futex resumed>) = 0 [pid 1422] <... mprotect resumed>) = 0 [pid 1419] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1422] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1428 attached , parent_tid=[1430], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1430 [pid 1422] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1428] set_robust_list(0x5555564066e0, 24) = 0 [pid 1428] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1428] setpgid(0, 0) = 0 [pid 1428] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1428] write(3, "1000", 4) = 4 [pid 1428] close(3) = 0 [pid 1428] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1428] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1428] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1428] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1431], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1431 [pid 1428] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1428] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1428] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1428] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1428] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1432], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1432 [pid 1428] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1428] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1430 attached [pid 1430] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1430] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1425] <... write resumed>) = 1048576 [pid 1425] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1425] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 7 [ 28.049670][ T1403] EXT4-fs (loop1): get root inode failed [ 28.055116][ T1403] EXT4-fs (loop1): mount failed [ 28.062588][ T1404] EXT4-fs (loop5): mount failed [ 28.077007][ T1418] loop3: detected capacity change from 0 to 2048 [pid 1425] ioctl(7, LOOP_SET_FD, 6./strace-static-x86_64: Process 1429 attached [pid 1430] <... futex resumed>) = 0 [pid 1422] <... futex resumed>) = 1 [pid 1430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1432 attached [pid 1432] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1432] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1431 attached [pid 1431] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1431] memfd_create("syzkaller", 0) = 4 [pid 1431] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1431] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1429] set_robust_list(0x7f6fa100b9e0, 24 [pid 1422] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1431] <... write resumed>) = 1048576 [pid 1431] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1431] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1432] <... open resumed>) = 3 [pid 1432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1428] <... futex resumed>) = 0 [pid 1432] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1428] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1432] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1428] <... futex resumed>) = 0 [pid 1432] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1428] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1432] <... mount resumed>) = 0 [pid 1432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1428] <... futex resumed>) = 0 [pid 1432] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1428] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1432] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1428] <... futex resumed>) = 0 [pid 1432] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1428] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1432] <... open resumed>) = 6 [pid 1432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1428] <... futex resumed>) = 0 [pid 1432] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1428] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1432] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1428] <... futex resumed>) = 0 [pid 1432] openat(-1, "/proc/self/exe", O_RDONLY [pid 1428] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1432] <... openat resumed>) = 7 [pid 1422] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1428] <... futex resumed>) = 0 [pid 1432] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1428] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1432] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1431] <... openat resumed>) = 5 [pid 1429] <... set_robust_list resumed>) = 0 [pid 1428] <... futex resumed>) = 0 [pid 1425] <... ioctl resumed>) = 0 [pid 1422] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1418] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1404] +++ exited with 0 +++ [pid 1403] +++ exited with 0 +++ [pid 1401] +++ exited with 0 +++ [pid 1400] +++ exited with 0 +++ [pid 1430] <... futex resumed>) = 0 [pid 1429] memfd_create("syzkaller", 0 [pid 1428] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1422] <... futex resumed>) = 1 [pid 1418] ioctl(5, LOOP_CLR_FD [pid 1432] sendfile(6, 7, NULL, 140737974943952 [pid 1430] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1429] <... memfd_create resumed>) = 4 [pid 1422] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1418] <... ioctl resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1400, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1401, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1431] ioctl(5, LOOP_SET_FD, 4 [pid 1429] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1430] <... mount resumed>) = 0 [pid 1425] close(6 [pid 1418] close(5 [pid 1431] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1429] <... mmap resumed>) = 0x7f6f98bca000 [pid 1425] <... close resumed>) = 0 [pid 1418] <... close resumed>) = 0 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1431] ioctl(5, LOOP_CLR_FD [pid 1430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1429] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1425] mkdir("./bus", 0777 [pid 1418] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... restart_syscall resumed>) = 0 [pid 1432] <... sendfile resumed>) = 1048576 [pid 1431] <... ioctl resumed>) = 0 [pid 1430] <... futex resumed>) = 1 [pid 1429] <... write resumed>) = 1048576 [pid 1425] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1422] <... futex resumed>) = 0 [pid 1418] <... futex resumed>) = 0 [pid 1415] exit_group(0 [pid 412] <... restart_syscall resumed>) = 0 [pid 1429] munmap(0x7f6f98bca000, 1048576 [pid 1425] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1423] <... futex resumed>) = ? [pid 1419] <... futex resumed>) = ? [pid 1415] <... exit_group resumed>) = ? [pid 1432] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1429] <... munmap resumed>) = 0 [pid 1423] +++ exited with 0 +++ [pid 1422] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1419] +++ exited with 0 +++ [pid 1418] +++ exited with 0 +++ [pid 1432] <... futex resumed>) = 1 [pid 1430] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1428] <... futex resumed>) = 0 [pid 1422] <... futex resumed>) = 0 [pid 1432] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1430] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1422] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1429] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1431] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1431] close(5) = 0 [pid 1431] close(4 [pid 412] <... openat resumed>) = 3 [pid 408] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 408] ioctl(3, LOOP_CLR_FD [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1431] <... close resumed>) = 0 [pid 412] close(3 [ 28.125328][ T1425] loop4: detected capacity change from 0 to 2048 [ 28.127851][ T1427] EXT4-fs warning (device loop3): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 28.142718][ T1418] EXT4-fs (loop3): get root inode failed [ 28.153974][ T1418] EXT4-fs (loop3): mount failed [pid 408] close(3 [pid 412] <... close resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1436 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1437 [pid 1431] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1431] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1428] exit_group(0 [pid 1432] <... futex resumed>) = ? [pid 1431] <... futex resumed>) = ? [pid 1428] <... exit_group resumed>) = ? [pid 1432] +++ exited with 0 +++ [pid 1431] +++ exited with 0 +++ ./strace-static-x86_64: Process 1436 attached ./strace-static-x86_64: Process 1437 attached [pid 1437] set_robust_list(0x5555564066e0, 24) = 0 [pid 1437] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1437] setpgid(0, 0) = 0 [pid 1437] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1437] write(3, "1000", 4) = 4 [pid 1437] close(3) = 0 [pid 1437] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1437] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1437] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1437] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1438], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1438 [pid 1437] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1437] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1437] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1437] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1437] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1439], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1439 [pid 1437] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1437] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1436] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 1438 attached ) = 0 ./strace-static-x86_64: Process 1439 attached [pid 1436] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1439] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1436] <... prctl resumed>) = 0 [pid 1438] set_robust_list(0x7f6fa100b9e0, 24 [pid 1436] setpgid(0, 0 [pid 1438] <... set_robust_list resumed>) = 0 [pid 1425] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1425] ioctl(7, LOOP_CLR_FD) = 0 [pid 1425] close(7) = 0 [pid 1425] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1425] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1439] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1436] <... setpgid resumed>) = 0 [pid 1436] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1424] exit_group(0) = ? [pid 1436] <... openat resumed>) = 3 [pid 1426] <... futex resumed>) = ? [pid 1436] write(3, "1000", 4) = 4 [pid 1436] close(3) = 0 [pid 1436] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1436] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1436] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1436] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1426] +++ exited with 0 +++ [pid 1436] <... clone resumed>, parent_tid=[1440], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1440 ./strace-static-x86_64: Process 1440 attached [pid 1438] memfd_create("syzkaller", 0 [pid 1436] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1436] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1436] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1436] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1436] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1441], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1441 [pid 1436] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1436] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1425] <... futex resumed>) = ? ./strace-static-x86_64: Process 1441 attached [pid 1440] set_robust_list(0x7f6fa100b9e0, 24 [pid 1438] <... memfd_create resumed>) = 4 [pid 1425] +++ exited with 0 +++ [pid 1424] +++ exited with 0 +++ [pid 1441] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1438] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1441] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1438] <... mmap resumed>) = 0x7f6f98bca000 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1424, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1440] <... set_robust_list resumed>) = 0 [pid 1440] memfd_create("syzkaller", 0) = 4 [pid 1440] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1440] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1438] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1430] <... open resumed>) = 5 [pid 1429] <... openat resumed>) = 6 [pid 411] <... openat resumed>) = 3 [pid 1439] <... open resumed>) = 3 [pid 1439] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1437] <... futex resumed>) = 0 [pid 1437] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1437] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1439] <... futex resumed>) = 1 [pid 1439] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1429] ioctl(6, LOOP_SET_FD, 4 [pid 1439] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1437] <... futex resumed>) = 0 [pid 1437] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1437] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1439] <... futex resumed>) = 1 [pid 1439] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1439] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1437] <... futex resumed>) = 0 [pid 1437] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1437] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1439] <... futex resumed>) = 1 [pid 1439] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1439] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1437] <... futex resumed>) = 0 [pid 1437] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1437] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1439] <... futex resumed>) = 1 [pid 1439] sendfile(5, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 1439] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1437] <... futex resumed>) = 0 [pid 1439] <... futex resumed>) = 1 [pid 1439] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1440] <... write resumed>) = 1048576 [pid 1440] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1440] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 1440] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 1438] <... write resumed>) = 1048576 [pid 1430] <... futex resumed>) = 1 [pid 1428] +++ exited with 0 +++ [pid 1422] <... futex resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1438] munmap(0x7f6f98bca000, 1048576 [pid 1430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1422] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... ioctl resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1428, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1438] <... munmap resumed>) = 0 [pid 1430] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1422] <... futex resumed>) = 0 [pid 411] close(3 [pid 1438] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1430] openat(-1, "/proc/self/exe", O_RDONLY [pid 1422] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... close resumed>) = 0 [pid 1441] <... open resumed>) = 3 [pid 1440] close(4 [pid 1438] <... openat resumed>) = 7 [pid 1430] <... openat resumed>) = 7 [pid 1429] <... ioctl resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1441] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1436] <... futex resumed>) = 0 [pid 1441] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1436] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1441] <... mount resumed>) = 0 [pid 1436] <... futex resumed>) = 0 [pid 1441] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1436] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1441] <... futex resumed>) = 0 [pid 1436] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1441] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1436] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1441] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1436] <... futex resumed>) = 0 [pid 1441] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1436] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1442 attached [pid 1441] <... open resumed>) = 6 [pid 1440] <... close resumed>) = 0 [pid 1438] ioctl(7, LOOP_SET_FD, 4 [pid 1430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1429] close(4 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1442 [pid 1441] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1436] <... futex resumed>) = 0 [pid 1441] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1436] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1441] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1436] <... futex resumed>) = 0 [pid 1441] openat(-1, "/proc/self/exe", O_RDONLY [pid 1436] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1441] <... openat resumed>) = 4 [pid 1441] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1436] <... futex resumed>) = 0 [pid 1441] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1436] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1441] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1436] <... futex resumed>) = 0 [ 28.185263][ T1425] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 28.215520][ T1429] loop2: detected capacity change from 0 to 2048 [ 28.219156][ T1440] loop5: detected capacity change from 0 to 2048 [pid 1441] sendfile(6, 4, NULL, 140737974943952 [pid 1436] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1441] <... sendfile resumed>) = 1048576 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1441] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1436] <... futex resumed>) = 0 [pid 1441] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1442] set_robust_list(0x5555564066e0, 24) = 0 [pid 1442] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1442] setpgid(0, 0) = 0 [pid 1442] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1442] write(3, "1000", 4) = 4 [pid 1442] close(3) = 0 [pid 1442] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1442] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1442] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1442] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1443], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1443 [pid 1442] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1442] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1442] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1442] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1442] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1444], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1444 [pid 1442] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1442] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1444 attached [pid 1444] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1444] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1444] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1442] <... futex resumed>) = 0 [pid 1442] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1442] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1444] <... futex resumed>) = 1 [pid 1444] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1430] <... futex resumed>) = 1 [pid 1444] <... mount resumed>) = 0 [pid 1422] <... futex resumed>) = 0 [pid 1444] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1422] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1430] sendfile(5, 7, NULL, 140737974943952 [pid 407] <... openat resumed>) = 3 [pid 1422] <... futex resumed>) = 0 [pid 1442] <... futex resumed>) = 0 [pid 1442] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1442] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1444] <... futex resumed>) = 1 [pid 1444] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1444] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1442] <... futex resumed>) = 0 [pid 1442] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1422] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] ioctl(3, LOOP_CLR_FD [pid 1429] <... close resumed>) = 0 [pid 1442] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1444] <... futex resumed>) = 1 [pid 1444] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1444] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1442] <... futex resumed>) = 0 [pid 1442] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1442] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1444] <... futex resumed>) = 1 [pid 1444] sendfile(4, 5, NULL, 140737974943952 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1440] mkdir("./bus", 0777 [pid 1438] <... ioctl resumed>) = 0 [pid 1429] mkdir("./bus", 0777 [pid 407] close(3./strace-static-x86_64: Process 1443 attached ) = 0 [pid 1443] set_robust_list(0x7f6fa100b9e0, 24 [pid 1440] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1438] close(4 [pid 1429] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1445 attached [pid 1443] <... set_robust_list resumed>) = 0 [pid 1440] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1438] <... close resumed>) = 0 [pid 1429] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1445] set_robust_list(0x5555564066e0, 24 [pid 1443] memfd_create("syzkaller", 0 [pid 1438] mkdir("./bus", 0777 [pid 1415] +++ exited with 0 +++ [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1445 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1415, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1430] <... sendfile resumed>) = 1048576 [pid 1430] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1446 [pid 1430] <... futex resumed>) = 1 [pid 1422] <... futex resumed>) = 0 [pid 1430] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [ 28.234299][ T1438] loop1: detected capacity change from 0 to 2048 [pid 1438] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1438] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1443] <... memfd_create resumed>) = 6 [pid 1443] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1445] <... set_robust_list resumed>) = 0 [pid 1445] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1443] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1446 attached [pid 1446] set_robust_list(0x5555564066e0, 24) = 0 [pid 1446] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1446] setpgid(0, 0) = 0 [pid 1446] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1445] setpgid(0, 0 [pid 1440] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1429] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1445] <... setpgid resumed>) = 0 [pid 1443] <... write resumed>) = 1048576 [pid 1440] ioctl(5, LOOP_CLR_FD [pid 1429] ioctl(6, LOOP_CLR_FD [pid 1445] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1440] <... ioctl resumed>) = 0 [pid 1429] <... ioctl resumed>) = 0 [pid 1445] <... openat resumed>) = 3 [pid 1440] close(5 [pid 1429] close(6 [pid 1445] write(3, "1000", 4 [pid 1442] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1440] <... close resumed>) = 0 [pid 1429] <... close resumed>) = 0 [pid 1445] <... write resumed>) = 4 [pid 1442] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} [pid 1440] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1429] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1445] close(3 [pid 1442] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1440] <... futex resumed>) = 0 [pid 1429] <... futex resumed>) = 0 [pid 1445] <... close resumed>) = 0 [pid 1442] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} [pid 1440] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1436] exit_group(0 [pid 1429] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1445] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1442] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1441] <... futex resumed>) = ? [pid 1440] <... futex resumed>) = ? [pid 1436] <... exit_group resumed>) = ? [pid 1422] exit_group(0 [pid 1445] <... futex resumed>) = 0 [pid 1441] +++ exited with 0 +++ [pid 1440] +++ exited with 0 +++ [pid 1436] +++ exited with 0 +++ [pid 1430] <... futex resumed>) = ? [pid 1429] <... futex resumed>) = ? [pid 1422] <... exit_group resumed>) = ? [pid 1445] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1430] +++ exited with 0 +++ [pid 1429] +++ exited with 0 +++ [pid 1422] +++ exited with 0 +++ [pid 1445] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1445] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1445] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1449], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1449 [pid 1445] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1445] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1445] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1445] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1445] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1450], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1450 [pid 1445] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1445] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1422, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1436, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1444] <... sendfile resumed>) = 1048576 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 1444] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... restart_syscall resumed>) = 0 [pid 1444] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1444] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1449 attached ./strace-static-x86_64: Process 1450 attached [pid 1446] write(3, "1000", 4 [pid 1443] munmap(0x7f6f98bca000, 1048576 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 409] <... openat resumed>) = 3 [pid 1446] <... write resumed>) = 4 [pid 412] <... openat resumed>) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 1446] close(3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 409] close(3 [pid 1446] <... close resumed>) = 0 [pid 1446] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... ioctl resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1446] <... futex resumed>) = 0 [pid 412] close(3 [pid 1446] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 412] <... close resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1451 [pid 1446] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1446] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1446] <... mprotect resumed>) = 0 [pid 1446] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1452 [pid 1446] <... clone resumed>, parent_tid=[1453], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1453 [pid 1446] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1446] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1443] <... munmap resumed>) = 0 [pid 1446] <... futex resumed>) = 0 [pid 1450] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1449] set_robust_list(0x7f6fa100b9e0, 24 [pid 1443] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1446] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1443] <... openat resumed>) = 7 ./strace-static-x86_64: Process 1451 attached [pid 1451] set_robust_list(0x5555564066e0, 24) = 0 [pid 1451] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1446] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1451] <... prctl resumed>) = 0 [pid 1446] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1446] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1451] setpgid(0, 0) = 0 [pid 1451] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1450] <... set_robust_list resumed>) = 0 [pid 1449] <... set_robust_list resumed>) = 0 [pid 1446] <... clone resumed>, parent_tid=[1454], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1454 [pid 1443] ioctl(7, LOOP_SET_FD, 6 [pid 1446] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1446] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1451] <... openat resumed>) = 3 [pid 1451] write(3, "1000", 4) = 4 [pid 1451] close(3) = 0 [pid 1451] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1450] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1449] memfd_create("syzkaller", 0 [pid 1443] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1451] <... futex resumed>) = 0 [pid 1451] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1451] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1451] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1455], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1455 [pid 1443] ioctl(7, LOOP_CLR_FD) = 0 [pid 1451] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1451] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1451] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1450] <... open resumed>) = 3 [pid 1449] <... memfd_create resumed>) = 4 [pid 1443] ioctl(7, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 1443] close(7) = 0 [pid 1443] close(6 [pid 1451] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1451] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1456], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1456 [pid 1451] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1451] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1449] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1443] <... close resumed>) = 0 [pid 1450] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1452 attached [pid 1452] set_robust_list(0x5555564066e0, 24) = 0 [pid 1452] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1452] setpgid(0, 0) = 0 [pid 1452] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1443] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1449] <... mmap resumed>) = 0x7f6f98bca000 [pid 1445] <... futex resumed>) = 0 [pid 1450] <... futex resumed>) = 1 [pid 1443] <... futex resumed>) = 0 [pid 1445] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1442] exit_group(0 [pid 1445] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1444] <... futex resumed>) = ? [pid 1442] <... exit_group resumed>) = ? [pid 1444] +++ exited with 0 +++ [pid 1452] <... openat resumed>) = 3 [pid 1452] write(3, "1000", 4) = 4 [pid 1452] close(3) = 0 [pid 1452] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1452] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1452] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1452] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1457], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1457 [pid 1452] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1452] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1452] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1452] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1452] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1458], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1458 [pid 1452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1457 attached [pid 1457] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1457] memfd_create("syzkaller", 0) = 3 [pid 1457] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1450] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1443] +++ exited with 0 +++ [pid 1442] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1442, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1450] <... mount resumed>) = 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1459 [pid 1450] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1445] <... futex resumed>) = 0 [pid 1445] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1450] <... futex resumed>) = 1 [pid 1445] <... futex resumed>) = 0 [pid 1445] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1450] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1453 attached ./strace-static-x86_64: Process 1456 attached ./strace-static-x86_64: Process 1455 attached ./strace-static-x86_64: Process 1454 attached ) = 5 [ 28.261755][ T1440] EXT4-fs (loop5): VFS: Can't find ext4 filesystem [ 28.269764][ T1429] EXT4-fs (loop2): VFS: Can't find ext4 filesystem [ 28.296748][ T1438] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1449] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1459 attached ./strace-static-x86_64: Process 1458 attached [pid 1457] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1456] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1455] set_robust_list(0x7f6fa100b9e0, 24 [pid 1454] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1453] set_robust_list(0x7f6fa100b9e0, 24 [pid 1450] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1449] <... write resumed>) = 1048576 [pid 1438] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1438] ioctl(7, LOOP_CLR_FD) = 0 [pid 1438] close(7) = 0 [pid 1438] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1438] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1453] <... set_robust_list resumed>) = 0 [pid 1450] <... futex resumed>) = 1 [pid 1445] <... futex resumed>) = 0 [pid 1445] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1454] <... set_robust_list resumed>) = 0 [pid 1453] memfd_create("syzkaller", 0 [pid 1454] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1450] openat(-1, "/proc/self/exe", O_RDONLY [pid 1445] <... futex resumed>) = 0 [pid 1437] exit_group(0 [pid 1439] <... futex resumed>) = ? [pid 1437] <... exit_group resumed>) = ? [pid 1439] +++ exited with 0 +++ [pid 1438] <... futex resumed>) = ? [pid 1454] <... open resumed>) = 3 [pid 1450] <... openat resumed>) = 6 [pid 1445] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1453] <... memfd_create resumed>) = 4 [pid 1455] <... set_robust_list resumed>) = 0 [pid 1449] munmap(0x7f6f98bca000, 1048576 [pid 1458] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1456] <... set_robust_list resumed>) = 0 [pid 1453] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1450] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1455] memfd_create("syzkaller", 0 [pid 1450] <... futex resumed>) = 1 [pid 1445] <... futex resumed>) = 0 [pid 1453] <... mmap resumed>) = 0x7f6f98bca000 [pid 1455] <... memfd_create resumed>) = 3 [pid 1454] <... futex resumed>) = 1 [pid 1446] <... futex resumed>) = 0 [pid 1450] sendfile(5, 6, NULL, 140737974943952 [pid 1445] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1457] <... write resumed>) = 1048576 [pid 1457] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1457] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [pid 1457] ioctl(4, LOOP_SET_FD, 3 [pid 1459] set_robust_list(0x5555564066e0, 24 [pid 1458] <... set_robust_list resumed>) = 0 [pid 1456] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1455] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1454] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1453] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1450] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1449] <... munmap resumed>) = 0 [pid 1446] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1445] <... futex resumed>) = 0 [pid 1454] <... mount resumed>) = 0 [pid 1450] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1446] <... futex resumed>) = 0 [pid 1445] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1450] <... futex resumed>) = 0 [pid 1446] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1445] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1454] <... futex resumed>) = 0 [pid 1450] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1446] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1454] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1446] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1459] <... set_robust_list resumed>) = 0 [pid 1457] <... ioctl resumed>) = 0 [pid 1454] <... open resumed>) = 5 [pid 1446] <... futex resumed>) = 0 [pid 1455] <... mmap resumed>) = 0x7f6f98bca000 [pid 1454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1446] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1459] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1458] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1457] close(3 [pid 1456] <... open resumed>) = 4 [pid 1454] <... futex resumed>) = 0 [pid 1446] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1454] openat(-1, "/proc/self/exe", O_RDONLY [pid 1446] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1454] <... openat resumed>) = 6 [pid 1449] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1446] <... futex resumed>) = 0 [pid 1454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1449] <... openat resumed>) = 7 [pid 1446] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1454] <... futex resumed>) = 0 [pid 1449] ioctl(7, LOOP_SET_FD, 4 [pid 1446] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1459] <... prctl resumed>) = 0 [pid 1458] <... open resumed>) = 5 [pid 1457] <... close resumed>) = 0 [pid 1456] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1455] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1454] sendfile(5, 6, NULL, 140737974943952 [pid 1453] <... write resumed>) = 1048576 [pid 1446] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1459] setpgid(0, 0 [pid 1458] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1456] <... futex resumed>) = 1 [pid 1454] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1451] <... futex resumed>) = 0 [pid 1446] <... futex resumed>) = 0 [pid 1454] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1446] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1459] <... setpgid resumed>) = 0 [pid 1458] <... futex resumed>) = 1 [pid 1456] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1452] <... futex resumed>) = 0 [pid 1451] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1454] <... futex resumed>) = 0 [pid 1452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1446] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1458] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1451] <... futex resumed>) = 0 [pid 1454] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1456] <... mount resumed>) = 0 [pid 1452] <... futex resumed>) = 0 [pid 1451] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1458] <... mount resumed>) = 0 [pid 1452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1459] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1458] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1456] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1459] <... openat resumed>) = 3 [pid 1458] <... futex resumed>) = 1 [pid 1456] <... futex resumed>) = 1 [pid 1452] <... futex resumed>) = 0 [pid 1451] <... futex resumed>) = 0 [pid 1458] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1456] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1451] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1452] <... futex resumed>) = 0 [pid 1451] <... futex resumed>) = 0 [pid 1452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1451] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1458] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1456] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1459] write(3, "1000", 4) = 4 [pid 1458] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1456] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1458] <... open resumed>) = 3 [pid 1456] <... open resumed>) = 5 [pid 1458] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1449] <... ioctl resumed>) = 0 [pid 1449] close(4) = 0 [pid 1459] close(3 [pid 1458] <... futex resumed>) = 1 [pid 1456] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1452] <... futex resumed>) = 0 [pid 1459] <... close resumed>) = 0 [pid 1458] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1456] <... futex resumed>) = 1 [pid 1452] <... futex resumed>) = 0 [pid 1451] <... futex resumed>) = 0 [pid 1452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1451] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1459] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1458] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1456] openat(-1, "/proc/self/exe", O_RDONLY [pid 1451] <... futex resumed>) = 0 [pid 1459] <... futex resumed>) = 0 [pid 1458] openat(-1, "/proc/self/exe", O_RDONLY [pid 1456] <... openat resumed>) = 6 [pid 1453] munmap(0x7f6f98bca000, 1048576 [pid 1451] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1459] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1458] <... openat resumed>) = 6 [pid 1456] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1459] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1458] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1449] mkdir("./bus", 0777 [pid 1459] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1458] <... futex resumed>) = 1 [pid 1456] <... futex resumed>) = 1 [pid 1452] <... futex resumed>) = 0 [pid 1451] <... futex resumed>) = 0 [pid 1459] <... mprotect resumed>) = 0 [pid 1458] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1456] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1453] <... munmap resumed>) = 0 [pid 1452] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1451] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1459] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1458] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1456] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1452] <... futex resumed>) = 0 [pid 1451] <... futex resumed>) = 0 [pid 1458] sendfile(3, 6, NULL, 140737974943952 [pid 1456] sendfile(5, 6, NULL, 140737974943952 [pid 1452] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1451] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1459] <... clone resumed>, parent_tid=[1460], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1460 [pid 1453] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1459] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1457] mkdir("./bus", 0777 [pid 1453] <... openat resumed>) = 7 [pid 1459] <... futex resumed>) = 0 [pid 1457] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1453] ioctl(7, LOOP_SET_FD, 4 [pid 1449] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1459] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1449] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1459] <... futex resumed>) = 0 [pid 1459] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1459] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1459] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1457] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1456] <... sendfile resumed>) = 1048576 [pid 1458] <... sendfile resumed>) = 1048576 [pid 1458] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1456] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1459] <... clone resumed>, parent_tid=[1461], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1461 [pid 1458] <... futex resumed>) = 1 [pid 1456] <... futex resumed>) = 1 [pid 1452] <... futex resumed>) = 0 [pid 1451] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1461 attached ./strace-static-x86_64: Process 1460 attached [pid 1459] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1458] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1457] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1456] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1455] <... write resumed>) = 1048576 [pid 1453] <... ioctl resumed>) = 0 [pid 1461] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1460] set_robust_list(0x7f6fa100b9e0, 24 [pid 1459] <... futex resumed>) = 0 [pid 1457] ioctl(4, LOOP_CLR_FD [pid 1455] munmap(0x7f6f98bca000, 1048576 [pid 1453] close(4 [pid 1461] <... set_robust_list resumed>) = 0 [pid 1460] <... set_robust_list resumed>) = 0 [pid 1459] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1457] <... ioctl resumed>) = 0 [pid 1455] <... munmap resumed>) = 0 [pid 1461] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1460] memfd_create("syzkaller", 0 [pid 1457] close(4 [pid 1455] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1453] <... close resumed>) = 0 [pid 1461] <... open resumed>) = 3 [pid 1453] mkdir("./bus", 0777 [pid 1461] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1460] <... memfd_create resumed>) = 4 [pid 1457] <... close resumed>) = 0 [pid 1453] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1461] <... futex resumed>) = 1 [pid 1459] <... futex resumed>) = 0 [pid 1461] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1460] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1459] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1457] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [ 28.357113][ T1457] loop5: detected capacity change from 0 to 2048 [ 28.367483][ T1449] loop0: detected capacity change from 0 to 2048 [ 28.389970][ T1457] EXT4-fs (loop5): VFS: Can't find ext4 filesystem [ 28.397868][ T1453] loop3: detected capacity change from 0 to 2048 [pid 1453] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1461] <... mount resumed>) = 0 [pid 1460] <... mmap resumed>) = 0x7f6f98bca000 [pid 1459] <... futex resumed>) = 0 [pid 1457] <... futex resumed>) = 0 [pid 1461] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1459] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1457] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1452] exit_group(0 [pid 1461] <... futex resumed>) = 0 [pid 1461] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1459] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1459] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1461] <... futex resumed>) = 0 [pid 1459] <... futex resumed>) = 1 [pid 1461] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1459] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1460] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1458] <... futex resumed>) = ? [pid 1457] <... futex resumed>) = ? [pid 1452] <... exit_group resumed>) = ? [pid 1461] <... open resumed>) = 5 [pid 1458] +++ exited with 0 +++ [pid 1457] +++ exited with 0 +++ [pid 1461] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1459] <... futex resumed>) = 0 [pid 1452] +++ exited with 0 +++ [pid 1461] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1459] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1452, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1461] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1459] <... futex resumed>) = 0 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 1461] openat(-1, "/proc/self/exe", O_RDONLY [pid 1459] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... restart_syscall resumed>) = 0 [pid 1460] <... write resumed>) = 1048576 [pid 1460] munmap(0x7f6f98bca000, 1048576 [pid 1461] <... openat resumed>) = 6 [pid 1460] <... munmap resumed>) = 0 [pid 1449] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1460] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1461] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1460] <... openat resumed>) = 7 [pid 1459] <... futex resumed>) = 0 [pid 1449] ioctl(7, LOOP_CLR_FD [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1461] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1460] ioctl(7, LOOP_SET_FD, 4 [pid 1459] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1461] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1460] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1459] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 1461] sendfile(5, 6, NULL, 140737974943952 [pid 1460] ioctl(7, LOOP_CLR_FD [pid 1459] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] ioctl(3, LOOP_CLR_FD [pid 1460] <... ioctl resumed>) = 0 [pid 1449] <... ioctl resumed>) = 0 [pid 1449] close(7) = 0 [pid 412] <... ioctl resumed>) = 0 [pid 1449] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] close(3 [pid 1449] <... futex resumed>) = 0 [pid 1449] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1460] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1460] close(7./strace-static-x86_64: Process 1466 attached [pid 1461] <... sendfile resumed>) = 1048576 [pid 1460] <... close resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1466 [pid 1461] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1445] exit_group(0 [pid 1461] <... futex resumed>) = 1 [pid 1459] <... futex resumed>) = 0 [pid 1450] <... futex resumed>) = ? [pid 1445] <... exit_group resumed>) = ? [pid 1461] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1450] +++ exited with 0 +++ [pid 1466] set_robust_list(0x5555564066e0, 24) = 0 [pid 1466] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1466] setpgid(0, 0) = 0 [pid 1466] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1466] write(3, "1000", 4) = 4 [pid 1466] close(3) = 0 [pid 1466] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1466] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1466] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1466] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1467], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1467 [pid 1466] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1466] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1466] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1466] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1466] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1468], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1468 [pid 1466] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1466] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1467 attached [pid 1467] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1467] memfd_create("syzkaller", 0) = 3 [pid 1467] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1468 attached [pid 1460] close(4 [pid 1449] <... futex resumed>) = ? [pid 1449] +++ exited with 0 +++ [pid 1445] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1445, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 407] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1469 [pid 1468] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1468] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1460] <... close resumed>) = 0 [pid 1455] <... openat resumed>) = 7 [pid 1460] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1455] ioctl(7, LOOP_SET_FD, 3 [pid 1438] +++ exited with 0 +++ [pid 1437] +++ exited with 0 +++ [pid 1460] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1437, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1459] exit_group(0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1461] <... futex resumed>) = ? [pid 1459] <... exit_group resumed>) = ? [pid 408] <... openat resumed>) = 3 [pid 1461] +++ exited with 0 +++ [pid 408] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1470 [pid 1466] <... futex resumed>) = 0 [pid 1466] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 28.411258][ T1449] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 28.432294][ T1453] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1466] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1468] <... futex resumed>) = 1 [pid 1468] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1460] +++ exited with 0 +++ [pid 1459] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1459, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1471 attached ./strace-static-x86_64: Process 1470 attached ./strace-static-x86_64: Process 1469 attached [pid 1455] <... ioctl resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1471 [pid 1468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1466] <... futex resumed>) = 0 [pid 1468] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1466] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1468] <... open resumed>) = 5 [pid 1466] <... futex resumed>) = 0 [pid 1468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1466] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1468] <... futex resumed>) = 0 [pid 1466] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1468] openat(-1, "/proc/self/exe", O_RDONLY [pid 1466] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1468] <... openat resumed>) = 6 [pid 1466] <... futex resumed>) = 0 [pid 1468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1466] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1468] <... futex resumed>) = 0 [pid 1466] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1468] sendfile(5, 6, NULL, 140737974943952 [pid 1466] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1471] set_robust_list(0x5555564066e0, 24 [pid 1470] set_robust_list(0x5555564066e0, 24 [pid 1469] set_robust_list(0x5555564066e0, 24 [pid 1466] <... futex resumed>) = 0 [pid 1455] close(3 [pid 1471] <... set_robust_list resumed>) = 0 [pid 1470] <... set_robust_list resumed>) = 0 [pid 1469] <... set_robust_list resumed>) = 0 [pid 1466] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1455] <... close resumed>) = 0 [pid 1471] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1469] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1455] mkdir("./bus", 0777 [pid 1453] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1471] <... prctl resumed>) = 0 [pid 1470] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1469] <... prctl resumed>) = 0 [pid 1455] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1453] ioctl(7, LOOP_CLR_FD [pid 1471] setpgid(0, 0 [pid 1470] <... prctl resumed>) = 0 [pid 1469] setpgid(0, 0 [pid 1455] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1453] <... ioctl resumed>) = 0 [pid 1468] <... sendfile resumed>) = 1048576 [pid 1453] close(7 [pid 1468] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1453] <... close resumed>) = 0 [pid 1468] <... futex resumed>) = 1 [pid 1466] <... futex resumed>) = 0 [pid 1453] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1468] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1453] <... futex resumed>) = 0 [pid 1453] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1471] <... setpgid resumed>) = 0 [pid 1471] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1446] exit_group(0 [pid 1453] <... futex resumed>) = ? [pid 1446] <... exit_group resumed>) = ? [pid 1453] +++ exited with 0 +++ [pid 1454] <... futex resumed>) = 230 [pid 1471] <... openat resumed>) = 3 [pid 1469] <... setpgid resumed>) = 0 [pid 1471] write(3, "1000", 4) = 4 [pid 1470] setpgid(0, 0 [pid 1469] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1471] close(3) = 0 [pid 1471] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1470] <... setpgid resumed>) = 0 [pid 1469] <... openat resumed>) = 3 [pid 1471] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1469] write(3, "1000", 4 [pid 1471] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1471] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1471] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1469] <... write resumed>) = 4 [pid 1467] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1470] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 1472 attached ) = 3 [pid 1469] close(3 [pid 1471] <... clone resumed>, parent_tid=[1472], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1472 [pid 1470] write(3, "1000", 4 [pid 1469] <... close resumed>) = 0 [pid 1471] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1470] <... write resumed>) = 4 [pid 1469] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1472] set_robust_list(0x7f6fa100b9e0, 24 [pid 1471] <... futex resumed>) = 0 [pid 1470] close(3 [pid 1467] <... write resumed>) = 1048576 [pid 1467] munmap(0x7f6f98bca000, 1048576 [pid 1472] <... set_robust_list resumed>) = 0 [pid 1472] memfd_create("syzkaller", 0 [pid 1471] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] <... futex resumed>) = 0 [pid 1470] <... close resumed>) = 0 [pid 1472] <... memfd_create resumed>) = 3 [pid 1472] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 1471] <... futex resumed>) = 0 [pid 1469] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1471] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1470] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1471] <... mmap resumed>) = 0x7f6f98bca000 [pid 1470] <... futex resumed>) = 0 [pid 1469] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1467] <... munmap resumed>) = 0 [pid 1471] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1470] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1469] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1471] <... mprotect resumed>) = 0 [pid 1470] <... mmap resumed>) = 0x7f6fa0feb000 [ 28.455824][ T1455] loop2: detected capacity change from 0 to 2048 [pid 1469] <... mprotect resumed>) = 0 [pid 1467] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1472] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1471] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1470] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1472] <... write resumed>) = 1048576 [pid 1469] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1472] munmap(0x7f6f98beb000, 1048576) = 0 [pid 1472] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 1472] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1472] ioctl(4, LOOP_CLR_FD) = 0 [pid 1467] <... openat resumed>) = 7 [pid 1467] ioctl(7, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1467] ioctl(7, LOOP_CLR_FD) = 0 [pid 1472] ioctl(4, LOOP_SET_FD, 3 [pid 1471] <... clone resumed>, parent_tid=[1475], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1475 [pid 1472] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1471] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1472] close(4 [pid 1471] <... futex resumed>) = 0 [pid 1472] <... close resumed>) = 0 [pid 1471] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1472] close(3 [pid 1467] ioctl(7, LOOP_SET_FD, 3 [pid 1472] <... close resumed>) = 0 [pid 1467] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1472] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1467] close(7 [pid 1472] <... futex resumed>) = 0 [pid 1467] <... close resumed>) = 0 [pid 1472] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1467] close(3) = 0 ./strace-static-x86_64: Process 1476 attached ./strace-static-x86_64: Process 1475 attached [pid 1470] <... mprotect resumed>) = 0 [pid 1454] +++ exited with 0 +++ [pid 1446] +++ exited with 0 +++ [pid 1476] set_robust_list(0x7f6fa100b9e0, 24 [pid 1475] set_robust_list(0x7f6f98bea9e0, 24 [pid 1470] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1469] <... clone resumed>, parent_tid=[1476], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1476 [pid 1476] <... set_robust_list resumed>) = 0 [pid 1475] <... set_robust_list resumed>) = 0 [pid 1469] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1467] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1446, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1476] memfd_create("syzkaller", 0 [pid 1475] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1470] <... clone resumed>, parent_tid=[1478], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1478 [pid 1469] <... futex resumed>) = 0 [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 1476] <... memfd_create resumed>) = 3 [pid 1475] <... open resumed>) = 3 [pid 1470] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1467] <... futex resumed>) = 0 [pid 1466] exit_group(0 [pid 410] <... restart_syscall resumed>) = 0 [pid 1476] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1475] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 1468] <... futex resumed>) = ? [pid 1466] <... exit_group resumed>) = ? [pid 1455] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1476] <... mmap resumed>) = 0x7f6f98beb000 [pid 1475] <... futex resumed>) = 1 [pid 1471] <... futex resumed>) = 0 [pid 1470] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1468] +++ exited with 0 +++ ./strace-static-x86_64: Process 1478 attached [pid 1476] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1471] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1470] <... futex resumed>) = 0 [pid 1469] <... mmap resumed>) = 0x7f6f98bca000 [pid 1455] ioctl(7, LOOP_CLR_FD [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1478] set_robust_list(0x7f6fa100b9e0, 24 [pid 1472] <... futex resumed>) = 0 [pid 1471] <... futex resumed>) = 1 [pid 1470] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1469] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 410] <... openat resumed>) = 3 [pid 1478] <... set_robust_list resumed>) = 0 [pid 1472] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1471] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1470] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1469] <... mprotect resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1478] memfd_create("syzkaller", 0 [pid 1472] <... mount resumed>) = 0 [pid 1470] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1469] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 410] <... ioctl resumed>) = 0 [pid 1478] <... memfd_create resumed>) = 3 [pid 1475] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1472] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1470] <... mprotect resumed>) = 0 [pid 1478] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1472] <... futex resumed>) = 1 [pid 1471] <... futex resumed>) = 0 [pid 1470] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 410] close(3 [pid 1478] <... mmap resumed>) = 0x7f6f98bca000 [pid 1472] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1471] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1480 attached ./strace-static-x86_64: Process 1479 attached [pid 1476] <... write resumed>) = 1048576 [pid 1472] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1471] <... futex resumed>) = 0 [pid 1469] <... clone resumed>, parent_tid=[1479], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1479 [pid 410] <... close resumed>) = 0 [pid 1480] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1479] set_robust_list(0x7f6f98bea9e0, 24 [pid 1476] munmap(0x7f6f98beb000, 1048576 [pid 1472] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1471] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1470] <... clone resumed>, parent_tid=[1480], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1480 [pid 1469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1480] <... set_robust_list resumed>) = 0 [pid 1479] <... set_robust_list resumed>) = 0 [pid 1476] <... munmap resumed>) = 0 [pid 1470] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] <... futex resumed>) = 0 [pid 1480] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1479] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1476] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1470] <... futex resumed>) = 0 [pid 1469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1481 [pid 1476] <... openat resumed>) = 4 [pid 1470] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1476] ioctl(4, LOOP_SET_FD, 3 [pid 1478] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1481 attached [pid 1476] <... ioctl resumed>) = 0 [pid 1476] close(3) = 0 [pid 1476] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1476] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1481] set_robust_list(0x5555564066e0, 24) = 0 [pid 1481] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1481] setpgid(0, 0) = 0 [pid 1481] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1481] write(3, "1000", 4) = 4 [pid 1481] close(3) = 0 [pid 1481] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1481] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1481] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1481] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1483], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1483 [pid 1481] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1481] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1481] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1481] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1481] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1478] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1483 attached [pid 1478] munmap(0x7f6f98bca000, 1048576./strace-static-x86_64: Process 1484 attached [pid 1481] <... clone resumed>, parent_tid=[1484], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1484 [pid 1484] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1478] <... munmap resumed>) = 0 [pid 1484] <... set_robust_list resumed>) = 0 [pid 1481] <... futex resumed>) = 0 [ 28.489034][ T1455] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 28.524664][ T1476] loop0: detected capacity change from 0 to 2048 [pid 1483] set_robust_list(0x7f6fa100b9e0, 24 [pid 1478] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1483] <... set_robust_list resumed>) = 0 [pid 1478] <... openat resumed>) = 5 [pid 1483] memfd_create("syzkaller", 0 [pid 1478] ioctl(5, LOOP_SET_FD, 3 [pid 1484] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1483] <... memfd_create resumed>) = 3 [pid 1481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1483] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1483] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1467] +++ exited with 0 +++ [pid 1466] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1466, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1483] <... write resumed>) = 1048576 [pid 1483] munmap(0x7f6f98bca000, 1048576 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 1484] <... open resumed>) = 4 [pid 1480] <... open resumed>) = 4 [pid 1479] <... open resumed>) = 5 [pid 1472] <... open resumed>) = 4 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1484] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1480] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1472] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... ioctl resumed>) = 0 [pid 1484] <... futex resumed>) = 1 [pid 1481] <... futex resumed>) = 0 [pid 1480] <... futex resumed>) = 1 [pid 1479] <... futex resumed>) = 1 [pid 1472] <... futex resumed>) = 1 [pid 1471] <... futex resumed>) = 0 [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 412] close(3 [pid 1484] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1480] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1470] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... close resumed>) = 0 [pid 1484] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1481] <... futex resumed>) = 0 [pid 1480] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1479] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1476] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1472] openat(-1, "/proc/self/exe", O_RDONLY [pid 1471] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 1455] <... ioctl resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1484] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1483] <... munmap resumed>) = 0 [pid 1481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1480] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1479] <... mount resumed>) = 0 [pid 1476] ioctl(4, LOOP_CLR_FD [pid 1472] <... openat resumed>) = 5 [pid 1471] <... futex resumed>) = 0 [pid 1470] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1455] close(7 [pid 1484] <... mount resumed>) = 0 [pid 1483] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1480] <... mount resumed>) = 0 [pid 1479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1472] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1471] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1469] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1455] <... close resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1486 [pid 1484] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1483] <... openat resumed>) = 5 [pid 1480] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1479] <... futex resumed>) = 0 [pid 1472] <... futex resumed>) = 0 [pid 1471] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1455] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1484] <... futex resumed>) = 1 [pid 1483] ioctl(5, LOOP_SET_FD, 3 [pid 1481] <... futex resumed>) = 0 [pid 1480] <... futex resumed>) = 1 [pid 1479] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1472] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1471] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 1455] <... futex resumed>) = 0 [pid 1451] exit_group(0 [pid 1484] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1483] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1480] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1472] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1471] <... futex resumed>) = 0 [pid 1470] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1456] <... futex resumed>) = ? [pid 1451] <... exit_group resumed>) = ? [pid 1484] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1483] ioctl(5, LOOP_CLR_FD [pid 1481] <... futex resumed>) = 0 [pid 1480] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1472] sendfile(4, 5, NULL, 140737974943952 [pid 1471] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1470] <... futex resumed>) = 0 [pid 1456] +++ exited with 0 +++ [pid 1455] +++ exited with 0 +++ [pid 1451] +++ exited with 0 +++ [pid 1484] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1480] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1472] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1470] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1451, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1472] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1471] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1486 attached [pid 1472] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1471] exit_group(0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1486] set_robust_list(0x5555564066e0, 24 [pid 1475] <... futex resumed>) = ? [pid 1472] <... futex resumed>) = ? [pid 1471] <... exit_group resumed>) = ? [pid 409] <... openat resumed>) = 3 [pid 1486] <... set_robust_list resumed>) = 0 [pid 1475] +++ exited with 0 +++ [pid 1472] +++ exited with 0 +++ [pid 409] ioctl(3, LOOP_CLR_FD [pid 1486] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1486] <... prctl resumed>) = 0 [pid 409] close(3 [pid 1486] setpgid(0, 0 [pid 409] <... close resumed>) = 0 [pid 1486] <... setpgid resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1486] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1484] <... open resumed>) = 6 [pid 1480] <... open resumed>) = 6 [pid 1479] <... open resumed>) = 3 [pid 1486] <... openat resumed>) = 3 [pid 1484] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1480] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1487 [pid 1486] write(3, "1000", 4) = 4 [pid 1484] <... futex resumed>) = 1 [pid 1481] <... futex resumed>) = 0 [pid 1480] <... futex resumed>) = 1 [pid 1479] <... futex resumed>) = 1 [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 1486] close(3 [pid 1484] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1480] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1479] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1470] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1487 attached [pid 1486] <... close resumed>) = 0 [pid 1484] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1481] <... futex resumed>) = 0 [pid 1480] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1479] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1478] <... ioctl resumed>) = 0 [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 1487] set_robust_list(0x5555564066e0, 24 [pid 1486] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1484] openat(-1, "/proc/self/exe", O_RDONLY [pid 1481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1480] openat(-1, "/proc/self/exe", O_RDONLY [pid 1479] openat(-1, "/proc/self/exe", O_RDONLY [pid 1478] close(3 [pid 1470] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1487] <... set_robust_list resumed>) = 0 [pid 1486] <... futex resumed>) = 0 [pid 1484] <... openat resumed>) = 7 [pid 1480] <... openat resumed>) = 7 [pid 1479] <... openat resumed>) = 6 [pid 1478] <... close resumed>) = 0 [pid 1487] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1486] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1484] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1480] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1478] mkdir("./bus", 0777 [pid 1487] <... prctl resumed>) = 0 [pid 1484] <... futex resumed>) = 1 [pid 1481] <... futex resumed>) = 0 [pid 1480] <... futex resumed>) = 1 [pid 1479] <... futex resumed>) = 1 [pid 1478] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 1487] setpgid(0, 0 [pid 1486] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1484] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1481] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1480] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1479] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1478] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1470] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1487] <... setpgid resumed>) = 0 [pid 1486] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1484] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1481] <... futex resumed>) = 0 [pid 1480] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1479] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 1487] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [ 28.540259][ T1476] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 28.540766][ T1478] loop1: detected capacity change from 0 to 2048 [pid 1484] sendfile(6, 7, NULL, 140737974943952 [pid 1481] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1480] sendfile(6, 7, NULL, 140737974943952 [pid 1479] sendfile(3, 6, NULL, 140737974943952 [pid 1470] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1469] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1487] <... openat resumed>) = 3 [pid 1486] <... mprotect resumed>) = 0 [pid 1484] <... sendfile resumed>) = 1048576 [pid 1486] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1488], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1488 [pid 1486] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1484] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1488 attached [pid 1487] write(3, "1000", 4 [pid 1484] <... futex resumed>) = 1 [pid 1481] <... futex resumed>) = 0 [pid 1480] <... sendfile resumed>) = 1048576 [pid 1479] <... sendfile resumed>) = 1048576 [pid 1488] set_robust_list(0x7f6fa100b9e0, 24 [pid 1487] <... write resumed>) = 4 [pid 1484] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1480] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1479] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1488] <... set_robust_list resumed>) = 0 [pid 1487] close(3 [pid 1480] <... futex resumed>) = 1 [pid 1479] <... futex resumed>) = 1 [pid 1488] memfd_create("syzkaller", 0 [pid 1487] <... close resumed>) = 0 [pid 1480] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1479] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1488] <... memfd_create resumed>) = 3 [pid 1487] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1488] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1487] <... futex resumed>) = 0 [pid 1488] <... mmap resumed>) = 0x7f6f98beb000 [pid 1487] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1486] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1483] <... ioctl resumed>) = 0 [pid 1478] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1471] +++ exited with 0 +++ [pid 1470] <... futex resumed>) = 0 [pid 1469] <... futex resumed>) = 0 [pid 1487] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1486] <... futex resumed>) = 0 [pid 1478] ioctl(5, LOOP_CLR_FD [pid 1476] <... ioctl resumed>) = 0 [pid 1487] <... mprotect resumed>) = 0 [pid 1486] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1478] <... ioctl resumed>) = 0 [pid 1476] close(4 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1471, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1487] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1486] <... mmap resumed>) = 0x7f6f98bca000 [pid 1478] close(5 [pid 1476] <... close resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1488] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1486] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1483] ioctl(5, LOOP_SET_FD, 3 [pid 1478] <... close resumed>) = 0 [pid 1476] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1469] exit_group(0 [pid 411] <... openat resumed>) = 3 ./strace-static-x86_64: Process 1489 attached [pid 1488] <... write resumed>) = 1048576 [pid 1487] <... clone resumed>, parent_tid=[1489], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1489 [pid 1486] <... mprotect resumed>) = 0 [pid 1479] <... futex resumed>) = ? [pid 1478] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1476] <... futex resumed>) = ? [pid 1469] <... exit_group resumed>) = ? [pid 411] ioctl(3, LOOP_CLR_FD [pid 1489] set_robust_list(0x7f6fa100b9e0, 24 [pid 1488] munmap(0x7f6f98beb000, 1048576 [pid 1487] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1486] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1483] <... ioctl resumed>) = 0 [pid 1479] +++ exited with 0 +++ [pid 1478] <... futex resumed>) = 0 [pid 1476] +++ exited with 0 +++ [pid 1470] exit_group(0 [pid 1469] +++ exited with 0 +++ [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) ./strace-static-x86_64: Process 1490 attached [pid 1489] <... set_robust_list resumed>) = 0 [pid 1488] <... munmap resumed>) = 0 [pid 1487] <... futex resumed>) = 0 [pid 1483] close(3 [pid 1480] <... futex resumed>) = ? [pid 1470] <... exit_group resumed>) = ? [pid 411] close(3 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1469, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1489] memfd_create("syzkaller", 0 [pid 1488] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1487] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1486] <... clone resumed>, parent_tid=[1490], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1490 [pid 1483] <... close resumed>) = 0 [pid 1480] +++ exited with 0 +++ [pid 1478] +++ exited with 0 +++ [pid 1470] +++ exited with 0 +++ [pid 411] <... close resumed>) = 0 [pid 1490] set_robust_list(0x7f6f98bea9e0, 24 [pid 1489] <... memfd_create resumed>) = 3 [pid 1488] <... openat resumed>) = 4 [pid 1487] <... futex resumed>) = 0 [pid 1486] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1483] mkdir("./bus", 0777 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1470, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1490] <... set_robust_list resumed>) = 0 [pid 1489] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1488] ioctl(4, LOOP_SET_FD, 3 [pid 1487] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1486] <... futex resumed>) = 0 [ 28.606209][ T1478] EXT4-fs warning (device loop1): read_mmp_block:107: Error -117 while reading MMP block 64 [ 28.642723][ T1483] loop3: detected capacity change from 0 to 2048 [pid 1483] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1489] <... mmap resumed>) = 0x7f6f98beb000 [pid 1486] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1483] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1491 [pid 408] <... restart_syscall resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 407] <... openat resumed>) = 3 [pid 408] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD [pid 408] ioctl(3, LOOP_CLR_FD [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1487] <... mmap resumed>) = 0x7f6f98bca000 [pid 408] <... ioctl resumed>) = 0 [pid 407] close(3 [pid 1490] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1489] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1487] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 408] close(3 [pid 407] <... close resumed>) = 0 [pid 1487] <... mprotect resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1487] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1493 [pid 1487] <... clone resumed>, parent_tid=[1495], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1495 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1494 ./strace-static-x86_64: Process 1495 attached ./strace-static-x86_64: Process 1494 attached ./strace-static-x86_64: Process 1493 attached ./strace-static-x86_64: Process 1491 attached [pid 1490] <... open resumed>) = 5 [pid 1489] <... write resumed>) = 1048576 [pid 1488] <... ioctl resumed>) = 0 [pid 1487] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1495] set_robust_list(0x7f6f98bea9e0, 24 [pid 1494] set_robust_list(0x5555564066e0, 24 [pid 1493] set_robust_list(0x5555564066e0, 24 [pid 1491] set_robust_list(0x5555564066e0, 24 [pid 1490] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1489] munmap(0x7f6f98beb000, 1048576 [pid 1488] close(3 [pid 1487] <... futex resumed>) = 0 [pid 1495] <... set_robust_list resumed>) = 0 [pid 1494] <... set_robust_list resumed>) = 0 [pid 1493] <... set_robust_list resumed>) = 0 [pid 1491] <... set_robust_list resumed>) = 0 [pid 1490] <... futex resumed>) = 1 [pid 1489] <... munmap resumed>) = 0 [pid 1488] <... close resumed>) = 0 [pid 1487] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1495] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1494] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1493] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1491] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1490] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1489] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1488] mkdir("./bus", 0777 [pid 1495] <... open resumed>) = 4 [pid 1494] <... prctl resumed>) = 0 [pid 1493] <... prctl resumed>) = 0 [pid 1491] <... prctl resumed>) = 0 [pid 1489] <... openat resumed>) = 5 [pid 1488] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1495] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1494] setpgid(0, 0 [pid 1493] setpgid(0, 0 [pid 1491] setpgid(0, 0 [pid 1489] ioctl(5, LOOP_SET_FD, 3 [pid 1488] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1495] <... futex resumed>) = 1 [pid 1494] <... setpgid resumed>) = 0 [pid 1493] <... setpgid resumed>) = 0 [pid 1491] <... setpgid resumed>) = 0 [pid 1487] <... futex resumed>) = 0 [pid 1486] <... futex resumed>) = 0 [pid 1495] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1494] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1493] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1491] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1487] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1495] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1494] <... openat resumed>) = 3 [pid 1493] <... openat resumed>) = 3 [pid 1491] <... openat resumed>) = 3 [pid 1487] <... futex resumed>) = 0 [pid 1486] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1495] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1494] write(3, "1000", 4 [pid 1493] write(3, "1000", 4 [pid 1491] write(3, "1000", 4 [pid 1487] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1495] <... mount resumed>) = 0 [pid 1494] <... write resumed>) = 4 [pid 1493] <... write resumed>) = 4 [pid 1491] <... write resumed>) = 4 [pid 1495] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1494] close(3 [pid 1493] close(3 [pid 1491] close(3 [pid 1495] <... futex resumed>) = 1 [pid 1494] <... close resumed>) = 0 [pid 1493] <... close resumed>) = 0 [pid 1491] <... close resumed>) = 0 [pid 1487] <... futex resumed>) = 0 [pid 1495] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1494] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1493] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1491] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1490] <... futex resumed>) = 0 [pid 1487] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1486] <... futex resumed>) = 1 [pid 1495] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1494] <... futex resumed>) = 0 [pid 1493] <... futex resumed>) = 0 [pid 1491] <... futex resumed>) = 0 [pid 1490] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1487] <... futex resumed>) = 0 [pid 1486] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1495] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1494] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1493] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1491] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1487] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1495] <... open resumed>) = 6 [pid 1494] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1493] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1491] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1490] <... mount resumed>) = 0 [pid 1495] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1494] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1493] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1491] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1495] <... futex resumed>) = 1 [pid 1494] <... mprotect resumed>) = 0 [pid 1493] <... mprotect resumed>) = 0 [pid 1491] <... mprotect resumed>) = 0 [pid 1490] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1487] <... futex resumed>) = 0 [pid 1495] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1494] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1493] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1491] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1487] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1495] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1490] <... futex resumed>) = 1 [pid 1487] <... futex resumed>) = 0 [pid 1486] <... futex resumed>) = 0 [pid 1495] openat(-1, "/proc/self/exe", O_RDONLY [pid 1494] <... clone resumed>, parent_tid=[1497], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1497 [pid 1493] <... clone resumed>, parent_tid=[1498], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1498 [pid 1491] <... clone resumed>, parent_tid=[1499], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1499 [pid 1490] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1487] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1486] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1495] <... openat resumed>) = 7 [pid 1494] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1493] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1491] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1490] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1486] <... futex resumed>) = 0 [pid 1495] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1494] <... futex resumed>) = 0 [pid 1493] <... futex resumed>) = 0 [pid 1491] <... futex resumed>) = 0 [pid 1490] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1495] <... futex resumed>) = 1 [pid 1494] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1493] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1491] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1487] <... futex resumed>) = 0 [pid 1486] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1495] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1494] <... futex resumed>) = 0 [pid 1493] <... futex resumed>) = 0 [pid 1491] <... futex resumed>) = 0 [pid 1490] <... open resumed>) = 3 [pid 1487] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1495] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1494] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1493] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1491] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1487] <... futex resumed>) = 0 [pid 1495] sendfile(6, 7, NULL, 140737974943952 [pid 1494] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1493] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1491] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1490] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1487] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1494] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1493] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1491] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1490] <... futex resumed>) = 1 [pid 1486] <... futex resumed>) = 0 [pid 1494] <... mprotect resumed>) = 0 [pid 1493] <... mprotect resumed>) = 0 [pid 1491] <... mprotect resumed>) = 0 [pid 1494] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1493] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1491] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1490] openat(-1, "/proc/self/exe", O_RDONLY [pid 1486] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1494] <... clone resumed>, parent_tid=[1501], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1501 [pid 1493] <... clone resumed>, parent_tid=[1502], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1502 [pid 1491] <... clone resumed>, parent_tid=[1503], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1503 [pid 1490] <... openat resumed>) = 6 [pid 1486] <... futex resumed>) = 0 [pid 1494] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1491] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1494] <... futex resumed>) = 0 [pid 1493] <... futex resumed>) = 0 [pid 1491] <... futex resumed>) = 0 [pid 1490] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1486] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1494] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1491] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1486] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1490] <... futex resumed>) = 0 [pid 1490] sendfile(3, 6, NULL, 140737974943952 [pid 1486] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1486] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1497 attached [pid 1497] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1497] memfd_create("syzkaller", 0) = 3 [pid 1497] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1495] <... sendfile resumed>) = 1048576 [pid 1495] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1487] <... futex resumed>) = 0 [pid 1495] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1490] <... sendfile resumed>) = 1048576 [pid 1490] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1486] <... futex resumed>) = 0 [pid 1490] <... futex resumed>) = 1 [pid 1490] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1497] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1483] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1483] ioctl(5, LOOP_CLR_FD) = 0 [ 28.673343][ T1488] loop5: detected capacity change from 0 to 2048 [ 28.699184][ T1483] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 28.700879][ T1489] loop2: detected capacity change from 0 to 2048 [pid 1483] close(5./strace-static-x86_64: Process 1503 attached ./strace-static-x86_64: Process 1502 attached ./strace-static-x86_64: Process 1501 attached ./strace-static-x86_64: Process 1499 attached ./strace-static-x86_64: Process 1498 attached [pid 1489] <... ioctl resumed>) = 0 [pid 1503] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1502] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1501] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1499] set_robust_list(0x7f6fa100b9e0, 24 [pid 1498] set_robust_list(0x7f6fa100b9e0, 24 [pid 1497] <... write resumed>) = 1048576 [pid 1489] close(3 [pid 1483] <... close resumed>) = 0 [pid 1503] <... set_robust_list resumed>) = 0 [pid 1503] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1503] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1491] <... futex resumed>) = 0 [pid 1503] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1491] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1503] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1491] <... futex resumed>) = 0 [pid 1503] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1491] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1503] <... mount resumed>) = 0 [pid 1503] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1491] <... futex resumed>) = 0 [pid 1503] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1491] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1503] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1491] <... futex resumed>) = 0 [pid 1503] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1491] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1503] <... open resumed>) = 4 [pid 1503] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1502] <... set_robust_list resumed>) = 0 [pid 1501] <... set_robust_list resumed>) = 0 [pid 1499] <... set_robust_list resumed>) = 0 [pid 1498] <... set_robust_list resumed>) = 0 [pid 1491] <... futex resumed>) = 0 [pid 1489] <... close resumed>) = 0 [pid 1503] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1497] munmap(0x7f6f98bca000, 1048576 [pid 1491] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1483] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1503] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1491] <... futex resumed>) = 0 [pid 1503] openat(-1, "/proc/self/exe", O_RDONLY [pid 1491] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1481] exit_group(0 [pid 1503] <... openat resumed>) = 5 [pid 1484] <... futex resumed>) = ? [pid 1481] <... exit_group resumed>) = ? [pid 1503] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1484] +++ exited with 0 +++ [pid 1503] <... futex resumed>) = 1 [pid 1491] <... futex resumed>) = 0 [pid 1503] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1491] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1503] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1491] <... futex resumed>) = 0 [pid 1503] sendfile(4, 5, NULL, 140737974943952 [pid 1491] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1503] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1503] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1491] <... futex resumed>) = 0 [pid 1503] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1502] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1493] <... futex resumed>) = 0 [pid 1502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1502] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1493] <... futex resumed>) = 0 [pid 1502] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1502] <... mount resumed>) = 0 [pid 1502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1493] <... futex resumed>) = 0 [pid 1502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1501] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1499] memfd_create("syzkaller", 0 [pid 1498] memfd_create("syzkaller", 0 [pid 1493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1502] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1501] <... open resumed>) = 4 [pid 1493] <... futex resumed>) = 0 [pid 1489] mkdir("./bus", 0777 [pid 1498] <... memfd_create resumed>) = 4 [pid 1483] <... futex resumed>) = ? [pid 1502] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1501] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1499] <... memfd_create resumed>) = 6 [pid 1498] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1497] <... munmap resumed>) = 0 [pid 1493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1489] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1502] <... open resumed>) = 5 [pid 1501] <... futex resumed>) = 1 [pid 1499] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1498] <... mmap resumed>) = 0x7f6f98bca000 [pid 1497] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1494] <... futex resumed>) = 0 [pid 1489] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1488] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1483] +++ exited with 0 +++ [pid 1481] +++ exited with 0 +++ [pid 1502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1501] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1499] <... mmap resumed>) = 0x7f6f98bca000 [pid 1498] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1497] <... openat resumed>) = 5 [pid 1494] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1488] ioctl(4, LOOP_CLR_FD [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1481, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1502] <... futex resumed>) = 1 [pid 1501] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1499] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1498] <... write resumed>) = 1048576 [pid 1497] ioctl(5, LOOP_SET_FD, 3 [pid 1494] <... futex resumed>) = 0 [pid 1493] <... futex resumed>) = 0 [pid 1488] <... ioctl resumed>) = 0 [pid 1502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1501] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1499] <... write resumed>) = 1048576 [pid 1498] munmap(0x7f6f98bca000, 1048576 [pid 1497] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1494] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1488] close(4 [pid 1502] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1501] <... mount resumed>) = 0 [pid 1499] munmap(0x7f6f98bca000, 1048576 [pid 1498] <... munmap resumed>) = 0 [pid 1497] ioctl(5, LOOP_CLR_FD [pid 1493] <... futex resumed>) = 0 [pid 1488] <... close resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1502] openat(-1, "/proc/self/exe", O_RDONLY [pid 1501] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1499] <... munmap resumed>) = 0 [pid 1498] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1497] <... ioctl resumed>) = 0 [pid 1493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1488] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1486] exit_group(0 [pid 410] <... openat resumed>) = 3 [pid 1502] <... openat resumed>) = 6 [pid 1501] <... futex resumed>) = 1 [pid 1499] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1498] <... openat resumed>) = 7 [pid 1494] <... futex resumed>) = 0 [pid 1490] <... futex resumed>) = ? [pid 1488] <... futex resumed>) = ? [pid 1486] <... exit_group resumed>) = ? [pid 410] ioctl(3, LOOP_CLR_FD [pid 1502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1501] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1499] <... openat resumed>) = 7 [ 28.748269][ T1500] EXT4-fs warning (device loop5): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 28.761829][ T1488] EXT4-fs (loop5): get root inode failed [ 28.768076][ T1488] EXT4-fs (loop5): mount failed [pid 1498] ioctl(7, LOOP_SET_FD, 4 [pid 1494] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1490] +++ exited with 0 +++ [pid 1488] +++ exited with 0 +++ [pid 1486] +++ exited with 0 +++ [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1502] <... futex resumed>) = 1 [pid 1501] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1499] ioctl(7, LOOP_SET_FD, 6 [pid 1497] ioctl(5, LOOP_SET_FD, 3 [pid 1493] <... futex resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1486, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 410] close(3 [pid 1494] <... futex resumed>) = 0 [pid 1502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1501] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1497] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1494] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1493] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... close resumed>) = 0 [pid 1502] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1501] <... open resumed>) = 6 [pid 1497] close(5 [pid 1493] <... futex resumed>) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1502] sendfile(5, 6, NULL, 140737974943952 [pid 1501] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1497] <... close resumed>) = 0 [pid 1493] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1502] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1501] <... futex resumed>) = 1 [pid 1497] close(3 [pid 1494] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1506 [pid 1502] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1501] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1497] <... close resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1502] <... futex resumed>) = 1 [pid 1497] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1494] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1493] <... futex resumed>) = 0 [pid 412] <... ioctl resumed>) = 0 [pid 1497] <... futex resumed>) = 0 [pid 412] close(3 [pid 1497] openat(-1, "/proc/self/exe", O_RDONLY [pid 412] <... close resumed>) = 0 [pid 1497] <... openat resumed>) = 3 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1502] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1497] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1494] <... futex resumed>) = 0 [pid 1497] <... futex resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1508 [pid 1497] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1494] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 1494] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1497] <... futex resumed>) = 0 [pid 1494] <... futex resumed>) = 1 [pid 1497] sendfile(6, 3, NULL, 140737974943952 [pid 1494] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1498] <... ioctl resumed>) = 0 [pid 1498] close(4) = 0 [pid 1498] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1498] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1499] <... ioctl resumed>) = 0 [pid 1499] close(6) = 0 [pid 1499] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1499] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1508 attached [pid 1508] set_robust_list(0x5555564066e0, 24) = 0 [pid 1508] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1508] setpgid(0, 0) = 0 [pid 1508] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1508] write(3, "1000", 4) = 4 [pid 1508] close(3) = 0 [pid 1508] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1508] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1508] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1508] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1509], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1509 [pid 1508] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1508] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1508] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1508] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1508] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1512], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1512 ./strace-static-x86_64: Process 1506 attached [pid 1508] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1512 attached ./strace-static-x86_64: Process 1509 attached ) = 0 [pid 1506] set_robust_list(0x5555564066e0, 24 [pid 1512] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1509] set_robust_list(0x7f6fa100b9e0, 24 [pid 1506] <... set_robust_list resumed>) = 0 [pid 1512] <... set_robust_list resumed>) = 0 [pid 1509] <... set_robust_list resumed>) = 0 [pid 1506] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1512] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1509] memfd_create("syzkaller", 0 [pid 1506] <... prctl resumed>) = 0 [pid 1512] <... open resumed>) = 3 [pid 1509] <... memfd_create resumed>) = 4 [pid 1506] setpgid(0, 0 [pid 1512] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1509] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1506] <... setpgid resumed>) = 0 [pid 1512] <... futex resumed>) = 0 [pid 1509] <... mmap resumed>) = 0x7f6f98bca000 [pid 1506] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1497] <... sendfile resumed>) = 1048576 [ 28.793911][ T1498] loop0: detected capacity change from 0 to 2048 [ 28.801004][ T1499] loop4: detected capacity change from 0 to 2048 [ 28.831896][ T1489] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1512] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1509] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1508] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1506] <... openat resumed>) = 3 [pid 1509] <... write resumed>) = 1048576 [pid 1506] write(3, "1000", 4) = 4 [pid 1506] close(3) = 0 [pid 1506] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1506] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1506] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1506] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1515], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1515 [pid 1506] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1506] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1506] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1506] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1506] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1516], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1516 [pid 1509] munmap(0x7f6f98bca000, 1048576 [pid 1506] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1509] <... munmap resumed>) = 0 [pid 1506] <... futex resumed>) = 0 [pid 1506] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1509] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 1509] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1509] ioctl(5, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 1516 attached [pid 1516] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1516] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1508] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1497] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1508] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1509] ioctl(5, LOOP_SET_FD, 4 [pid 1497] <... futex resumed>) = 1 [pid 1494] <... futex resumed>) = 0 [pid 1512] <... futex resumed>) = 0 [pid 1509] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1508] <... futex resumed>) = 1 [pid 1489] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1512] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1509] close(5 [pid 1512] <... mount resumed>) = 0 [pid 1489] ioctl(5, LOOP_CLR_FD [pid 1512] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1509] <... close resumed>) = 0 [pid 1512] <... futex resumed>) = 0 [pid 1509] close(4 [pid 1512] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1509] <... close resumed>) = 0 [pid 1509] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1509] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1516] <... open resumed>) = 3 ./strace-static-x86_64: Process 1515 attached [pid 1515] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1515] memfd_create("syzkaller", 0 [pid 1516] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1506] <... futex resumed>) = 0 [pid 1506] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1506] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1497] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1494] exit_group(0 [pid 1508] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 1508] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1501] <... futex resumed>) = ? [pid 1497] <... futex resumed>) = ? [pid 1494] <... exit_group resumed>) = ? [pid 1508] <... futex resumed>) = 1 [pid 1501] +++ exited with 0 +++ [pid 1516] <... futex resumed>) = 1 [pid 1515] <... memfd_create resumed>) = 4 [pid 1509] <... futex resumed>) = 0 [pid 1497] +++ exited with 0 +++ [pid 1516] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1515] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1509] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1516] <... mount resumed>) = 0 [pid 1515] <... mmap resumed>) = 0x7f6f98bca000 [pid 1509] <... open resumed>) = 4 [pid 1508] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1494] +++ exited with 0 +++ [pid 1516] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1509] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1494, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1499] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1498] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 408] <... restart_syscall resumed>) = 0 [pid 1498] ioctl(7, LOOP_CLR_FD) = 0 [pid 1499] ioctl(7, LOOP_CLR_FD [pid 1498] close(7 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1499] <... ioctl resumed>) = 0 [pid 1498] <... close resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 1499] close(7 [pid 1498] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1499] <... close resumed>) = 0 [pid 1498] <... futex resumed>) = 0 [pid 408] <... ioctl resumed>) = 0 [pid 1499] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1498] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] close(3 [pid 1499] <... futex resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 1499] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1509] <... futex resumed>) = 1 [pid 1508] <... futex resumed>) = 0 [pid 1493] exit_group(0 [pid 1491] exit_group(0 [pid 1508] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1503] <... futex resumed>) = ? [pid 1502] <... futex resumed>) = ? [pid 1499] <... futex resumed>) = ? [pid 1498] <... futex resumed>) = ? [pid 1493] <... exit_group resumed>) = ? [pid 1491] <... exit_group resumed>) = ? [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1517 [pid 1509] openat(-1, "/proc/self/exe", O_RDONLY [pid 1506] <... futex resumed>) = 0 [pid 1516] <... futex resumed>) = 1 [pid 1508] <... futex resumed>) = 0 [pid 1503] +++ exited with 0 +++ [pid 1502] +++ exited with 0 +++ [pid 1499] +++ exited with 0 +++ [pid 1491] +++ exited with 0 +++ [pid 1508] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1506] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1491, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1506] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1516] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1509] <... openat resumed>) = 5 [pid 411] <... restart_syscall resumed>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1516] <... open resumed>) = 5 [pid 1509] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1508] <... futex resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1518 ./strace-static-x86_64: Process 1518 attached ./strace-static-x86_64: Process 1517 attached [pid 1516] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1509] sendfile(4, 5, NULL, 140737974943952 [pid 1508] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1518] set_robust_list(0x5555564066e0, 24 [pid 1517] set_robust_list(0x5555564066e0, 24 [pid 1516] <... futex resumed>) = 1 [pid 1508] <... futex resumed>) = 0 [pid 1506] <... futex resumed>) = 0 [pid 1515] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1508] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1506] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1516] openat(-1, "/proc/self/exe", O_RDONLY [pid 1506] <... futex resumed>) = 0 [pid 1516] <... openat resumed>) = 6 [pid 1506] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1516] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1506] <... futex resumed>) = 0 [pid 1516] sendfile(5, 6, NULL, 140737974943952 [pid 1506] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1518] <... set_robust_list resumed>) = 0 [pid 1516] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1509] <... sendfile resumed>) = 1048576 [pid 1517] <... set_robust_list resumed>) = 0 [pid 1506] <... futex resumed>) = 0 [pid 1518] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1517] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1516] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1515] <... write resumed>) = 1048576 [pid 1509] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1506] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1518] <... prctl resumed>) = 0 [pid 1517] <... prctl resumed>) = 0 [pid 1516] <... futex resumed>) = 0 [pid 1515] munmap(0x7f6f98bca000, 1048576 [pid 1509] <... futex resumed>) = 1 [pid 1508] <... futex resumed>) = 0 [pid 1506] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1516] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1509] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1508] exit_group(0 [pid 1512] <... futex resumed>) = ? [pid 1508] <... exit_group resumed>) = ? [pid 1512] +++ exited with 0 +++ [pid 1509] <... futex resumed>) = ? [pid 1518] setpgid(0, 0) = 0 [pid 1518] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1518] write(3, "1000", 4) = 4 [pid 1518] close(3) = 0 [pid 1509] +++ exited with 0 +++ [pid 1508] +++ exited with 0 +++ [pid 1518] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1508, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1518] <... futex resumed>) = 0 [pid 1518] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1517] setpgid(0, 0 [pid 1518] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1518] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1517] <... setpgid resumed>) = 0 [pid 1518] <... mprotect resumed>) = 0 [pid 1515] <... munmap resumed>) = 0 [pid 1518] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1519 attached [pid 1517] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1515] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1518] <... clone resumed>, parent_tid=[1519], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1519 [pid 1518] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1517] <... openat resumed>) = 3 [pid 1519] set_robust_list(0x7f6fa100b9e0, 24 [pid 1518] <... futex resumed>) = 0 [pid 1515] <... openat resumed>) = 7 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1518] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1519] <... set_robust_list resumed>) = 0 [pid 1517] write(3, "1000", 4 [pid 1515] ioctl(7, LOOP_SET_FD, 4 [pid 412] <... openat resumed>) = 3 [pid 1518] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1518] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 412] <... ioctl resumed>) = 0 [pid 1518] <... mmap resumed>) = 0x7f6fa0fca000 [pid 412] close(3 [pid 1518] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 412] <... close resumed>) = 0 [pid 1518] <... mprotect resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1518] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1520 [pid 1518] <... clone resumed>, parent_tid=[1521], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1521 [pid 1518] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1518] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1520 attached [pid 1520] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 1521 attached [pid 1521] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1521] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1520] <... set_robust_list resumed>) = 0 [pid 1489] <... ioctl resumed>) = 0 [pid 1520] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1517] <... write resumed>) = 4 [ 28.849956][ T1498] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 28.862186][ T1499] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1517] close(3 [pid 1489] close(5 [pid 1520] <... prctl resumed>) = 0 [pid 1520] setpgid(0, 0) = 0 [pid 1520] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1520] write(3, "1000", 4) = 4 [pid 1520] close(3) = 0 [pid 1520] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1520] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1520] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1520] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1522], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1522 [pid 1520] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1520] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1520] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1520] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1520] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1523], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1523 [pid 1520] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1520] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1523 attached [pid 1523] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1523] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1522 attached [pid 1522] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1522] memfd_create("syzkaller", 0) = 4 [pid 1522] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1517] <... close resumed>) = 0 [pid 1517] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1489] <... close resumed>) = 0 [pid 1517] <... futex resumed>) = 0 [pid 1521] <... open resumed>) = 3 [pid 1519] memfd_create("syzkaller", 0 [pid 1515] <... ioctl resumed>) = 0 [pid 1517] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1489] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1523] <... open resumed>) = 3 [pid 1523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1520] <... futex resumed>) = 0 [pid 1520] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1520] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1523] <... futex resumed>) = 1 [pid 1523] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1520] <... futex resumed>) = 0 [pid 1520] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1520] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1523] <... futex resumed>) = 1 [pid 1487] exit_group(0 [pid 1495] <... futex resumed>) = ? [pid 1487] <... exit_group resumed>) = ? [pid 1495] +++ exited with 0 +++ [pid 1523] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1517] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1489] <... futex resumed>) = 230 [pid 1521] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1520] <... futex resumed>) = 0 [pid 1520] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1520] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1523] <... futex resumed>) = 1 [pid 1523] openat(-1, "/proc/self/exe", O_RDONLY [pid 1521] <... futex resumed>) = 1 [pid 1518] <... futex resumed>) = 0 [pid 1517] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1518] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1518] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1523] <... openat resumed>) = 6 [pid 1521] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1517] <... mprotect resumed>) = 0 [pid 1523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1520] <... futex resumed>) = 0 [pid 1520] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1520] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1521] <... mount resumed>) = 0 [pid 1521] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1517] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1523] <... futex resumed>) = 1 [pid 1523] sendfile(5, 6, NULL, 140737974943952./strace-static-x86_64: Process 1524 attached [pid 1521] <... futex resumed>) = 1 [pid 1519] <... memfd_create resumed>) = 4 [pid 1518] <... futex resumed>) = 0 [pid 1517] <... clone resumed>, parent_tid=[1524], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1524 [pid 1515] close(4 [pid 1518] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1518] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1524] set_robust_list(0x7f6fa100b9e0, 24 [pid 1521] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1519] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1517] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1515] <... close resumed>) = 0 [pid 1524] <... set_robust_list resumed>) = 0 [pid 1519] <... mmap resumed>) = 0x7f6f98bca000 [pid 1517] <... futex resumed>) = 0 [pid 1515] mkdir("./bus", 0777 [pid 1517] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1517] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1517] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1517] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1515] <... mkdir resumed>) = -1 EEXIST (File exists) ./strace-static-x86_64: Process 1525 attached [pid 1524] memfd_create("syzkaller", 0 [pid 1519] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1517] <... clone resumed>, parent_tid=[1525], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1525 [pid 1515] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1523] <... sendfile resumed>) = 1048576 [pid 1517] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1523] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1520] <... futex resumed>) = 0 [pid 1523] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1517] <... futex resumed>) = 0 [pid 1517] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1522] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1524] <... memfd_create resumed>) = 3 [pid 1524] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1519] <... write resumed>) = 1048576 [pid 1519] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1519] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1525] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1525] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1524] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1522] <... write resumed>) = 1048576 [pid 1522] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1522] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 1522] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1522] ioctl(7, LOOP_CLR_FD) = 0 [pid 1524] <... write resumed>) = 1048576 [pid 1522] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1522] close(7) = 0 [pid 1522] close(4) = 0 [pid 1522] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1522] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1524] munmap(0x7f6f98bca000, 1048576 [pid 1520] exit_group(0 [pid 1523] <... futex resumed>) = ? [pid 1520] <... exit_group resumed>) = ? [pid 1523] +++ exited with 0 +++ [pid 1522] <... futex resumed>) = ? [pid 1524] <... munmap resumed>) = 0 [pid 1524] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1522] +++ exited with 0 +++ [pid 1520] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1520, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 412] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1528 ./strace-static-x86_64: Process 1528 attached [pid 1528] set_robust_list(0x5555564066e0, 24) = 0 [pid 1528] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1528] setpgid(0, 0) = 0 [pid 1528] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1528] write(3, "1000", 4) = 4 [pid 1528] close(3) = 0 [pid 1528] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1528] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1528] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1528] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1529], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1529 [pid 1528] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1528] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1528] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1528] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1528] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1530], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1530 [pid 1528] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1528] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1529 attached [pid 1529] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1529] memfd_create("syzkaller", 0) = 3 [pid 1529] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1529] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1529] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1529] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [pid 1529] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1529] ioctl(4, LOOP_CLR_FD) = 0 [pid 1529] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1529] close(4) = 0 [pid 1529] close(3 [pid 1498] +++ exited with 0 +++ [pid 1493] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1493, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 407] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1531 [pid 1529] <... close resumed>) = 0 [pid 1521] <... open resumed>) = 5 [pid 1519] <... openat resumed>) = 6 [pid 1525] <... open resumed>) = 4 [pid 1529] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1529] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1530 attached [pid 1489] +++ exited with 0 +++ [pid 1524] <... openat resumed>) = 5 [pid 1487] +++ exited with 0 +++ [pid 1521] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1519] ioctl(6, LOOP_SET_FD, 4 [pid 1525] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1524] ioctl(5, LOOP_SET_FD, 3 [pid 1521] <... futex resumed>) = 1 [pid 1518] <... futex resumed>) = 0 [pid 1521] openat(-1, "/proc/self/exe", O_RDONLY [pid 1518] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1487, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [ 28.899313][ T1515] loop3: detected capacity change from 0 to 2048 [ 28.937850][ T1515] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1530] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1530] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1532 ./strace-static-x86_64: Process 1531 attached [pid 1531] set_robust_list(0x5555564066e0, 24) = 0 [pid 1531] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1524] <... ioctl resumed>) = 0 [pid 1518] <... futex resumed>) = 0 [pid 1521] <... openat resumed>) = 7 [pid 1518] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1521] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1531] <... prctl resumed>) = 0 [pid 1531] setpgid(0, 0) = 0 [pid 1531] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1531] write(3, "1000", 4) = 4 [pid 1531] close(3) = 0 [pid 1531] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1531] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1531] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1531] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1533], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1533 [pid 1531] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1518] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1517] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1525] <... futex resumed>) = 0 [pid 1521] <... futex resumed>) = 0 [pid 1518] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1517] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1525] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1521] sendfile(5, 7, NULL, 140737974943952 [pid 1518] <... futex resumed>) = 0 [pid 1517] <... futex resumed>) = 0 [pid 1521] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1518] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1517] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1525] <... mount resumed>) = 0 [pid 1521] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1518] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1525] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1521] <... futex resumed>) = 0 [pid 1521] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1525] <... futex resumed>) = 1 [pid 1517] <... futex resumed>) = 0 [pid 1525] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1517] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1525] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1517] <... futex resumed>) = 0 [pid 1525] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1517] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1525] <... open resumed>) = 6 [pid 1525] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1524] close(3 [pid 1517] <... futex resumed>) = 0 [pid 1525] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1524] <... close resumed>) = 0 [pid 1517] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1525] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1524] mkdir("./bus", 0777 [pid 1517] <... futex resumed>) = 0 [pid 1525] openat(-1, "/proc/self/exe", O_RDONLY [pid 1524] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1517] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1515] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1525] <... openat resumed>) = 3 [pid 1524] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1525] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1515] ioctl(7, LOOP_CLR_FD [pid 1525] <... futex resumed>) = 1 [pid 1517] <... futex resumed>) = 0 [pid 1515] <... ioctl resumed>) = 0 [pid 1525] sendfile(6, 3, NULL, 140737974943952 [pid 1517] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1515] close(7./strace-static-x86_64: Process 1532 attached [pid 1530] <... open resumed>) = 3 [pid 1530] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1517] <... futex resumed>) = 0 [pid 1530] <... futex resumed>) = 1 [pid 1528] <... futex resumed>) = 0 [pid 1517] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1530] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1528] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1529] <... futex resumed>) = 0 [pid 1528] <... futex resumed>) = 1 [pid 1529] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1528] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1529] <... mount resumed>) = 0 [pid 1529] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1528] <... futex resumed>) = 0 [pid 1529] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1528] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1531] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1528] <... futex resumed>) = 0 [pid 1531] <... futex resumed>) = 0 [pid 1529] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1528] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1531] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1529] <... open resumed>) = 4 [pid 1525] <... sendfile resumed>) = 1048576 [pid 1515] <... close resumed>) = 0 [pid 1531] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1529] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1532] set_robust_list(0x5555564066e0, 24 [pid 1531] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1529] <... futex resumed>) = 1 [pid 1528] <... futex resumed>) = 0 [pid 1525] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1519] <... ioctl resumed>) = 0 [pid 1515] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1532] <... set_robust_list resumed>) = 0 [pid 1531] <... mprotect resumed>) = 0 [pid 1529] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1528] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1525] <... futex resumed>) = 1 [pid 1519] close(4 [pid 1517] <... futex resumed>) = 0 [pid 1515] <... futex resumed>) = 0 [pid 1506] exit_group(0 [pid 1531] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1528] <... futex resumed>) = 0 [pid 1506] <... exit_group resumed>) = ? [pid 1529] openat(-1, "/proc/self/exe", O_RDONLY [pid 1528] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1531] <... clone resumed>, parent_tid=[1534], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1534 [pid 1529] <... openat resumed>) = 5 [pid 1531] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1529] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1531] <... futex resumed>) = 0 [pid 1529] <... futex resumed>) = 1 [pid 1528] <... futex resumed>) = 0 [pid 1531] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1529] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1528] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1528] <... futex resumed>) = 0 [pid 1529] sendfile(4, 5, NULL, 140737974943952 [pid 1528] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1529] <... sendfile resumed>) = 1048576 [pid 1529] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1528] <... futex resumed>) = 0 [pid 1529] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1528] exit_group(0 [pid 1532] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1530] <... futex resumed>) = ? [pid 1529] <... futex resumed>) = ? [pid 1528] <... exit_group resumed>) = ? [pid 1525] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1519] <... close resumed>) = 0 [pid 1516] <... futex resumed>) = ? [pid 1530] +++ exited with 0 +++ [pid 1529] +++ exited with 0 +++ [pid 1528] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1528, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1516] +++ exited with 0 +++ [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1535 ./strace-static-x86_64: Process 1533 attached [pid 1533] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1533] memfd_create("syzkaller", 0) = 3 [pid 1533] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1535 attached [pid 1535] set_robust_list(0x5555564066e0, 24) = 0 [pid 1535] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1535] setpgid(0, 0 [pid 1532] <... prctl resumed>) = 0 [pid 1519] mkdir("./bus", 0777 [pid 1535] <... setpgid resumed>) = 0 [pid 1532] setpgid(0, 0 [pid 1519] <... mkdir resumed>) = -1 EEXIST (File exists) ./strace-static-x86_64: Process 1534 attached [pid 1532] <... setpgid resumed>) = 0 [pid 1519] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1534] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1532] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1532] write(3, "1000", 4 [pid 1534] <... set_robust_list resumed>) = 0 [pid 1532] <... write resumed>) = 4 [pid 1524] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1534] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1535] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1532] close(3 [pid 1524] ioctl(5, LOOP_CLR_FD [pid 1535] <... openat resumed>) = 3 [pid 1532] <... close resumed>) = 0 [pid 1535] write(3, "1000", 4 [pid 1532] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1524] <... ioctl resumed>) = 0 [pid 1535] <... write resumed>) = 4 [pid 1532] <... futex resumed>) = 0 [pid 1535] close(3 [pid 1532] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1535] <... close resumed>) = 0 [pid 1532] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1535] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1532] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1535] <... futex resumed>) = 0 [pid 1532] <... mprotect resumed>) = 0 [pid 1524] close(5 [pid 1535] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1532] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1535] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1524] <... close resumed>) = 0 [pid 1535] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1533] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1532] <... clone resumed>, parent_tid=[1536], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1536 [pid 1535] <... mprotect resumed>) = 0 [pid 1532] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1535] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1532] <... futex resumed>) = 0 [pid 1524] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1517] exit_group(0 [pid 1532] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1517] <... exit_group resumed>) = ? [pid 1525] <... futex resumed>) = -1 (errno 18446744073709551414) [pid 1532] <... futex resumed>) = 0 [pid 1524] <... futex resumed>) = ? [pid 1525] +++ exited with 0 +++ [pid 1532] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1535] <... clone resumed>, parent_tid=[1537], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1537 [pid 1532] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1535] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1532] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1535] <... futex resumed>) = 0 [pid 1532] <... mprotect resumed>) = 0 [pid 1535] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1532] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1535] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1537 attached [pid 1535] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1532] <... clone resumed>, parent_tid=[1538], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1538 [pid 1537] set_robust_list(0x7f6fa100b9e0, 24 [pid 1535] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1532] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1535] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1532] <... futex resumed>) = 0 [pid 1537] <... set_robust_list resumed>) = 0 [pid 1535] <... mprotect resumed>) = 0 [pid 1532] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1536 attached [pid 1535] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1541 attached [pid 1537] memfd_create("syzkaller", 0 [pid 1536] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1537] <... memfd_create resumed>) = 3 [pid 1535] <... clone resumed>, parent_tid=[1541], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1541 [pid 1541] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1536] memfd_create("syzkaller", 0 [pid 1535] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1536] <... memfd_create resumed>) = 3 [pid 1535] <... futex resumed>) = 0 [pid 1541] <... set_robust_list resumed>) = 0 [pid 1537] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1536] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1535] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1541] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1537] <... mmap resumed>) = 0x7f6f98bca000 [pid 1536] <... mmap resumed>) = 0x7f6f98bca000 [pid 1533] <... write resumed>) = 1048576 [pid 1536] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1538 attached [pid 1537] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1538] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1538] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1533] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1533] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [ 28.958484][ T1524] loop1: detected capacity change from 0 to 2048 [ 28.964906][ T1519] loop4: detected capacity change from 0 to 2048 [ 28.986410][ T1524] EXT4-fs warning (device loop1): read_mmp_block:107: Error -117 while reading MMP block 64 [pid 1533] ioctl(5, LOOP_SET_FD, 3 [pid 1537] <... write resumed>) = 1048576 [pid 1537] munmap(0x7f6f98bca000, 1048576 [pid 1536] <... write resumed>) = 1048576 [pid 1536] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1536] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 5 [pid 1536] ioctl(5, LOOP_SET_FD, 3 [pid 1537] <... munmap resumed>) = 0 [pid 1533] <... ioctl resumed>) = 0 [pid 1531] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1537] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1531] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1531] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6f98ca9000 [pid 1531] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1531] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1542], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 1542 [pid 1531] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1531] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1533] close(3) = 0 [pid 1533] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1533] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1542 attached [pid 1536] <... ioctl resumed>) = 0 [pid 1519] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1542] set_robust_list(0x7f6f98cc99e0, 24 [pid 1536] close(3 [pid 1542] <... set_robust_list resumed>) = 0 [pid 1519] ioctl(6, LOOP_CLR_FD [pid 1542] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1536] <... close resumed>) = 0 [pid 1519] <... ioctl resumed>) = 0 [pid 1542] <... mount resumed>) = 0 [pid 1542] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1536] mkdir("./bus", 0777 [pid 1519] close(6 [pid 1542] <... futex resumed>) = 1 [pid 1531] <... futex resumed>) = 0 [pid 1519] <... close resumed>) = 0 [pid 1542] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1536] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1531] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1519] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1542] <... open resumed>) = 3 [pid 1531] <... futex resumed>) = 0 [pid 1519] <... futex resumed>) = 0 [pid 1542] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1531] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1519] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1542] <... futex resumed>) = 0 [pid 1531] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1515] +++ exited with 0 +++ [pid 1506] +++ exited with 0 +++ [pid 1542] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1531] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1542] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1531] <... futex resumed>) = 0 [pid 1542] openat(-1, "/proc/self/exe", O_RDONLY [pid 1531] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1542] <... openat resumed>) = 6 [pid 1542] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1541] <... open resumed>) = 4 [pid 1538] <... open resumed>) = 4 [pid 1534] <... open resumed>) = 4 [pid 1537] <... openat resumed>) = 5 [pid 1542] <... futex resumed>) = 1 [pid 1541] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1538] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1537] ioctl(5, LOOP_SET_FD, 3 [pid 1534] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1531] <... futex resumed>) = 0 [pid 1542] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1541] <... futex resumed>) = 1 [pid 1535] <... futex resumed>) = 0 [pid 1531] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1535] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1531] <... futex resumed>) = 0 [pid 1535] <... futex resumed>) = 0 [pid 1531] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1535] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1536] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1538] <... futex resumed>) = 1 [pid 1538] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1534] <... futex resumed>) = 1 [pid 1531] <... futex resumed>) = 0 [pid 1534] sendfile(3, 6, NULL, 140737974943952 [pid 1531] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=48000000} [pid 1541] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1537] <... ioctl resumed>) = 0 [pid 1532] <... futex resumed>) = 0 [pid 1518] exit_group(0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1506, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1541] <... mount resumed>) = 0 [pid 1532] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1518] <... exit_group resumed>) = ? [pid 1541] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1538] <... futex resumed>) = 0 [pid 1537] close(3 [pid 1532] <... futex resumed>) = 1 [pid 1521] <... futex resumed>) = ? [pid 1519] <... futex resumed>) = ? [pid 1541] <... futex resumed>) = 1 [pid 1538] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1535] <... futex resumed>) = 0 [pid 1538] <... mount resumed>) = 0 [pid 1521] +++ exited with 0 +++ [pid 1538] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1541] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1538] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1537] <... close resumed>) = 0 [pid 1535] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1534] <... sendfile resumed>) = 1048576 [pid 1532] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1534] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1531] <... futex resumed>) = 0 [pid 1534] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1541] <... open resumed>) = 3 [pid 1541] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1541] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1537] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1537] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1541] <... futex resumed>) = 0 [pid 1535] <... futex resumed>) = 1 [pid 1532] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 29.025720][ T1533] loop0: detected capacity change from 0 to 2048 [ 29.033485][ T1519] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 29.036591][ T1536] loop2: detected capacity change from 0 to 2048 [ 29.056319][ T1537] loop5: detected capacity change from 0 to 2048 [pid 1541] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1535] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1532] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1538] <... futex resumed>) = 0 [pid 1535] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1532] <... futex resumed>) = 1 [pid 1538] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1535] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1532] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1541] <... futex resumed>) = 0 [pid 1538] <... open resumed>) = 3 [pid 1535] <... futex resumed>) = 1 [pid 1541] openat(-1, "/proc/self/exe", O_RDONLY [pid 1538] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1535] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1541] <... openat resumed>) = 6 [pid 1538] <... futex resumed>) = 1 [pid 1532] <... futex resumed>) = 0 [pid 1541] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1538] openat(-1, "/proc/self/exe", O_RDONLY [pid 1532] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1541] <... futex resumed>) = 1 [pid 1538] <... openat resumed>) = 6 [pid 1535] <... futex resumed>) = 0 [pid 1532] <... futex resumed>) = 0 [pid 1541] sendfile(3, 6, NULL, 140737974943952 [pid 1538] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1535] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1532] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1538] <... futex resumed>) = 0 [pid 1535] <... futex resumed>) = 0 [pid 1532] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1538] sendfile(3, 6, NULL, 140737974943952 [pid 1535] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1532] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1533] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1532] <... futex resumed>) = 0 [pid 1524] +++ exited with 0 +++ [pid 1519] +++ exited with 0 +++ [pid 1518] +++ exited with 0 +++ [pid 1517] +++ exited with 0 +++ [pid 410] <... openat resumed>) = 3 [pid 1536] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1532] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1518, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 410] ioctl(3, LOOP_CLR_FD [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1517, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 1536] ioctl(5, LOOP_CLR_FD [pid 1533] ioctl(5, LOOP_CLR_FD [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1536] <... ioctl resumed>) = 0 [pid 1533] <... ioctl resumed>) = 0 [pid 1536] close(5 [pid 1533] close(5 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1549 [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1536] <... close resumed>) = 0 [pid 1533] <... close resumed>) = 0 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1536] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1533] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] close(3 [pid 408] <... openat resumed>) = 3 [pid 1536] <... futex resumed>) = 0 [pid 1533] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1536] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1533] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1531] exit_group(0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1542] <... futex resumed>) = ? [pid 1534] <... futex resumed>) = ? [pid 1533] <... futex resumed>) = ? [pid 1531] <... exit_group resumed>) = ? [pid 1542] +++ exited with 0 +++ [pid 1534] +++ exited with 0 +++ [pid 408] close(3 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1550 [pid 408] <... close resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1538] <... sendfile resumed>) = 1048576 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1551 [pid 1538] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1532] <... futex resumed>) = 0 [pid 1532] exit_group(0 [pid 1536] <... futex resumed>) = ? [pid 1532] <... exit_group resumed>) = ? [pid 1536] +++ exited with 0 +++ [pid 1538] +++ exited with 0 +++ [pid 1532] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1532, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- ./strace-static-x86_64: Process 1550 attached [pid 1541] <... sendfile resumed>) = 1048576 [pid 1541] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1535] <... futex resumed>) = 0 [pid 1541] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1550] set_robust_list(0x5555564066e0, 24 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1552 [pid 1550] <... set_robust_list resumed>) = 0 [pid 1550] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1550] setpgid(0, 0) = 0 [pid 1550] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 1549 attached [pid 1549] set_robust_list(0x5555564066e0, 24 [pid 1550] <... openat resumed>) = 3 [pid 1549] <... set_robust_list resumed>) = 0 [pid 1549] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1550] write(3, "1000", 4) = 4 [pid 1550] close(3 [pid 1549] <... prctl resumed>) = 0 ./strace-static-x86_64: Process 1551 attached [pid 1550] <... close resumed>) = 0 [pid 1549] setpgid(0, 0 [pid 1551] set_robust_list(0x5555564066e0, 24 [pid 1550] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1551] <... set_robust_list resumed>) = 0 [pid 1549] <... setpgid resumed>) = 0 [pid 1550] <... futex resumed>) = 0 [pid 1551] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1550] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1549] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1551] <... prctl resumed>) = 0 [pid 1550] <... mmap resumed>) = 0x7f6fa0feb000 [ 29.072405][ T1543] EXT4-fs warning (device loop0): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 29.073695][ T1533] EXT4-fs (loop0): get root inode failed [ 29.089367][ T1533] EXT4-fs (loop0): mount failed [ 29.091497][ T1537] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 29.103974][ T1536] EXT4-fs (loop2): get root inode failed [ 29.109711][ T1536] EXT4-fs (loop2): mount failed [pid 1551] setpgid(0, 0 [pid 1550] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1549] <... openat resumed>) = 3 ./strace-static-x86_64: Process 1552 attached [pid 1551] <... setpgid resumed>) = 0 [pid 1550] <... mprotect resumed>) = 0 [pid 1549] write(3, "1000", 4 [pid 1552] set_robust_list(0x5555564066e0, 24 [pid 1551] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1550] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1549] <... write resumed>) = 4 [pid 1551] write(3, "1000", 4) = 4 [pid 1551] close(3 [pid 1550] <... clone resumed>, parent_tid=[1553], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1553 [pid 1549] close(3 [pid 1551] <... close resumed>) = 0 [pid 1551] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1550] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1551] <... futex resumed>) = 0 [pid 1551] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1551] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1551] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1550] <... futex resumed>) = 0 [pid 1551] <... clone resumed>, parent_tid=[1554], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1554 [pid 1550] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1549] <... close resumed>) = 0 [pid 1551] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1551] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1551] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1551] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1552] <... set_robust_list resumed>) = 0 [pid 1551] <... mprotect resumed>) = 0 [pid 1550] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1551] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1550] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1549] <... futex resumed>) = 0 [pid 1552] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1551] <... clone resumed>, parent_tid=[1555], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1555 [pid 1551] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1550] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1549] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1551] <... futex resumed>) = 0 [pid 1551] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1554 attached [pid 1554] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1554] memfd_create("syzkaller", 0 [pid 1550] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1552] <... prctl resumed>) = 0 [pid 1549] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1550] <... mprotect resumed>) = 0 [pid 1549] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1554] <... memfd_create resumed>) = 3 [pid 1554] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1550] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1554] <... mmap resumed>) = 0x7f6f98bca000 [pid 1549] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1550] <... clone resumed>, parent_tid=[1556], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1556 [pid 1550] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1549] <... clone resumed>, parent_tid=[1557], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1557 [pid 1552] setpgid(0, 0 [pid 1550] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1552] <... setpgid resumed>) = 0 [pid 1550] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1549] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1552] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1549] <... futex resumed>) = 0 [pid 1549] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1552] <... openat resumed>) = 3 [pid 1549] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1552] write(3, "1000", 4 [pid 1549] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 1556 attached ./strace-static-x86_64: Process 1555 attached ./strace-static-x86_64: Process 1553 attached [pid 1552] <... write resumed>) = 4 ./strace-static-x86_64: Process 1557 attached [pid 1556] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1554] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1549] <... mprotect resumed>) = 0 [pid 1537] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1533] +++ exited with 0 +++ [pid 1531] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1531, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1558 [pid 1537] ioctl(5, LOOP_CLR_FD) = 0 [pid 1537] close(5 [pid 1552] close(3 [pid 1549] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1552] <... close resumed>) = 0 [pid 1537] <... close resumed>) = 0 [pid 1537] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1552] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1549] <... clone resumed>, parent_tid=[1559], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1559 [pid 1537] <... futex resumed>) = 0 [pid 1537] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1553] set_robust_list(0x7f6fa100b9e0, 24 [pid 1552] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1535] exit_group(0 [pid 1541] <... futex resumed>) = ? [pid 1535] <... exit_group resumed>) = ? [pid 1557] set_robust_list(0x7f6fa100b9e0, 24 [pid 1556] <... set_robust_list resumed>) = 0 [pid 1555] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1553] <... set_robust_list resumed>) = 0 [pid 1552] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1549] <... futex resumed>) = 0 [pid 1541] +++ exited with 0 +++ [pid 1552] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1549] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1556] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1553] memfd_create("syzkaller", 0 [pid 1552] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1537] <... futex resumed>) = ? [pid 1557] <... set_robust_list resumed>) = 0 [pid 1556] <... open resumed>) = 4 [pid 1555] <... set_robust_list resumed>) = 0 [pid 1553] <... memfd_create resumed>) = 3 [pid 1552] <... mprotect resumed>) = 0 [pid 1556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1553] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1552] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1555] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1553] <... mmap resumed>) = 0x7f6f98bca000 [pid 1552] <... clone resumed>, parent_tid=[1560], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1560 [pid 1556] <... futex resumed>) = 1 [pid 1550] <... futex resumed>) = 0 [pid 1550] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1552] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1559 attached [pid 1559] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1559] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1559] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1559] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1560 attached [pid 1560] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1560] memfd_create("syzkaller", 0) = 3 [pid 1560] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 1556] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1552] <... futex resumed>) = 0 [pid 1550] <... futex resumed>) = 0 [pid 1549] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1550] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1552] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1558 attached [pid 1556] <... mount resumed>) = 0 [pid 1549] <... futex resumed>) = 1 [pid 1552] <... futex resumed>) = 0 [pid 1559] <... futex resumed>) = 0 [pid 1559] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1559] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1559] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1558] set_robust_list(0x5555564066e0, 24) = 0 [pid 1558] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1549] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1552] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1558] <... prctl resumed>) = 0 [pid 1558] setpgid(0, 0) = 0 [pid 1558] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1549] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1552] <... mmap resumed>) = 0x7f6f98bca000 [pid 1556] <... futex resumed>) = 1 [pid 1550] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1550] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1556] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1552] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1549] <... futex resumed>) = 1 [pid 1555] <... open resumed>) = 4 [pid 1550] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1552] <... mprotect resumed>) = 0 [pid 1556] <... open resumed>) = 5 [pid 1552] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1550] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1559] <... futex resumed>) = 0 [pid 1559] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1556] <... futex resumed>) = 1 [pid 1550] <... futex resumed>) = 0 [pid 1555] <... futex resumed>) = 1 [pid 1552] <... clone resumed>, parent_tid=[1561], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1561 [pid 1551] <... futex resumed>) = 0 [pid 1556] openat(-1, "/proc/self/exe", O_RDONLY [pid 1550] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1551] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1550] <... futex resumed>) = 0 [pid 1551] <... futex resumed>) = 0 [pid 1559] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1551] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1559] <... futex resumed>) = 1 [pid 1550] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1549] <... futex resumed>) = 0 [pid 1559] openat(-1, "/proc/self/exe", O_RDONLY [pid 1549] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1559] <... openat resumed>) = 5 [pid 1549] <... futex resumed>) = 0 [pid 1552] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1559] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1556] <... openat resumed>) = 6 [pid 1555] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1552] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1559] <... futex resumed>) = 0 [pid 1557] memfd_create("syzkaller", 0 [pid 1556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1552] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1549] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1559] sendfile(4, 5, NULL, 140737974943952 [pid 1556] <... futex resumed>) = 1 [pid 1555] <... mount resumed>) = 0 [pid 1550] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1559] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1556] sendfile(5, 6, NULL, 140737974943952 [pid 1555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1550] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1549] <... futex resumed>) = 0 [pid 1557] <... memfd_create resumed>) = 6 [pid 1556] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1559] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1555] <... futex resumed>) = 1 [pid 1556] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1551] <... futex resumed>) = 0 [pid 1550] <... futex resumed>) = 0 [pid 1549] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1559] <... futex resumed>) = 0 [pid 1558] <... openat resumed>) = 3 [pid 1556] <... futex resumed>) = 0 [pid 1555] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1551] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1550] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1549] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1557] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1559] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1558] write(3, "1000", 4 [pid 1556] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1555] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1551] <... futex resumed>) = 0 [pid 1550] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1558] <... write resumed>) = 4 [pid 1557] <... mmap resumed>) = 0x7f6f98bca000 [pid 1553] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1551] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1555] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1558] close(3) = 0 [pid 1558] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1555] <... open resumed>) = 5 [pid 1560] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1558] <... futex resumed>) = 0 [pid 1557] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1553] <... write resumed>) = 1048576 [pid 1537] +++ exited with 0 +++ [pid 1535] +++ exited with 0 +++ [pid 1558] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1555] <... futex resumed>) = 1 [pid 1551] <... futex resumed>) = 0 [pid 1558] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1555] openat(-1, "/proc/self/exe", O_RDONLY [pid 1551] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1535, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- ./strace-static-x86_64: Process 1561 attached [pid 1558] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1555] <... openat resumed>) = 6 [pid 1551] <... futex resumed>) = 0 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 1561] set_robust_list(0x7f6f98bea9e0, 24 [pid 1560] <... write resumed>) = 1048576 [pid 1558] <... mprotect resumed>) = 0 [pid 1555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1553] munmap(0x7f6f98bca000, 1048576 [pid 1551] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... restart_syscall resumed>) = 0 [pid 1561] <... set_robust_list resumed>) = 0 [pid 1558] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1555] <... futex resumed>) = 0 [pid 1553] <... munmap resumed>) = 0 [pid 1551] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1561] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1555] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1551] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1561] <... open resumed>) = 4 [pid 1558] <... clone resumed>, parent_tid=[1562], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1562 [pid 1555] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1551] <... futex resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1561] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1558] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1555] sendfile(5, 6, NULL, 140737974943952 [pid 1553] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1551] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... openat resumed>) = 3 [pid 1561] <... futex resumed>) = 1 [pid 1558] <... futex resumed>) = 0 [pid 1555] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1552] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1561] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1558] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1555] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1553] <... openat resumed>) = 7 [pid 1552] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1561] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1558] <... futex resumed>) = 0 [pid 1555] <... futex resumed>) = 1 [pid 1552] <... futex resumed>) = 0 [pid 1551] <... futex resumed>) = 0 [pid 412] close(3 [pid 1561] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1558] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1555] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1552] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... close resumed>) = 0 [pid 1561] <... mount resumed>) = 0 [pid 1558] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1553] ioctl(7, LOOP_SET_FD, 3 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1561] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1558] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 1562 attached [pid 1561] <... futex resumed>) = 1 [pid 1560] munmap(0x7f6f98beb000, 1048576 [pid 1558] <... mprotect resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1563 [pid 1562] set_robust_list(0x7f6fa100b9e0, 24 [pid 1561] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1560] <... munmap resumed>) = 0 [pid 1558] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1562] <... set_robust_list resumed>) = 0 [pid 1560] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1558] <... clone resumed>, parent_tid=[1564], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1564 [pid 1552] <... futex resumed>) = 0 [pid 1558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1562] memfd_create("syzkaller", 0 [pid 1560] <... openat resumed>) = 5 [pid 1552] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1562] <... memfd_create resumed>) = 3 [pid 1560] ioctl(5, LOOP_SET_FD, 3./strace-static-x86_64: Process 1563 attached [pid 1562] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1560] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1563] set_robust_list(0x5555564066e0, 24 [pid 1562] <... mmap resumed>) = 0x7f6f98bca000 [pid 1560] ioctl(5, LOOP_CLR_FD [pid 1561] <... futex resumed>) = 0 [pid 1552] <... futex resumed>) = 1 [pid 1561] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1552] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1563] <... set_robust_list resumed>) = 0 [pid 1562] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1561] <... open resumed>) = 6 [pid 1560] <... ioctl resumed>) = 0 [pid 1557] <... write resumed>) = 1048576 [pid 1563] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1561] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1552] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 1564 attached [pid 1563] <... prctl resumed>) = 0 [pid 1561] <... futex resumed>) = 0 [pid 1552] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1564] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1563] setpgid(0, 0 [pid 1561] openat(-1, "/proc/self/exe", O_RDONLY [pid 1552] <... futex resumed>) = 0 [pid 1564] <... set_robust_list resumed>) = 0 [pid 1563] <... setpgid resumed>) = 0 [pid 1561] <... openat resumed>) = 7 [pid 1552] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1564] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1563] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1561] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1552] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1564] <... open resumed>) = 4 [pid 1563] <... openat resumed>) = 3 [pid 1561] <... futex resumed>) = 0 [pid 1552] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1563] write(3, "1000", 4 [pid 1561] sendfile(6, 7, NULL, 140737974943952 [pid 1560] ioctl(5, LOOP_SET_FD, 3 [pid 1552] <... futex resumed>) = 0 [pid 1564] <... futex resumed>) = 1 [pid 1563] <... write resumed>) = 4 [pid 1560] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1558] <... futex resumed>) = 0 [pid 1552] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1563] close(3 [pid 1560] close(5 [pid 1558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1564] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1563] <... close resumed>) = 0 [pid 1560] <... close resumed>) = 0 [pid 1558] <... futex resumed>) = 0 [pid 1564] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1563] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1560] close(3 [pid 1558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1564] <... mount resumed>) = 0 [pid 1563] <... futex resumed>) = 0 [pid 1562] <... write resumed>) = 1048576 [pid 1561] <... sendfile resumed>) = 1048576 [pid 1560] <... close resumed>) = 0 [pid 1557] munmap(0x7f6f98bca000, 1048576 [pid 1554] <... write resumed>) = 1048576 [pid 1553] <... ioctl resumed>) = 0 [pid 1564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1563] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1561] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1560] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1554] munmap(0x7f6f98bca000, 1048576 [pid 1564] <... futex resumed>) = 1 [pid 1563] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1561] <... futex resumed>) = 1 [pid 1560] <... futex resumed>) = 0 [pid 1558] <... futex resumed>) = 0 [pid 1557] <... munmap resumed>) = 0 [pid 1552] <... futex resumed>) = 0 [pid 1564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1563] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1561] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1560] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1557] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1554] <... munmap resumed>) = 0 [pid 1552] exit_group(0 [pid 1564] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1563] <... mprotect resumed>) = 0 [pid 1561] <... futex resumed>) = ? [pid 1560] <... futex resumed>) = ? [pid 1558] <... futex resumed>) = 0 [pid 1552] <... exit_group resumed>) = ? [pid 1564] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1563] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1561] +++ exited with 0 +++ [pid 1560] +++ exited with 0 +++ [pid 1558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1557] <... openat resumed>) = 7 [pid 1554] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1552] +++ exited with 0 +++ [pid 1564] <... open resumed>) = 5 [pid 1562] munmap(0x7f6f98bca000, 1048576 [pid 1557] ioctl(7, LOOP_SET_FD, 6 [pid 1554] <... openat resumed>) = 7 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1552, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1563] <... clone resumed>, parent_tid=[1565], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1565 [pid 1562] <... munmap resumed>) = 0 [pid 1554] ioctl(7, LOOP_SET_FD, 3 [pid 1564] <... futex resumed>) = 1 [pid 1563] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1562] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1558] <... futex resumed>) = 0 [pid 1564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1563] <... futex resumed>) = 0 [pid 1562] <... openat resumed>) = 6 [pid 1558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1564] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1563] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1562] ioctl(6, LOOP_SET_FD, 3 [pid 1558] <... futex resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 1564] openat(-1, "/proc/self/exe", O_RDONLY [pid 1563] <... futex resumed>) = 0 [pid 1558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] ioctl(3, LOOP_CLR_FD [pid 1564] <... openat resumed>) = 7 [pid 1563] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 409] <... ioctl resumed>) = 0 [pid 1564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1563] <... mmap resumed>) = 0x7f6fa0fca000 [pid 409] close(3 [pid 1564] <... futex resumed>) = 1 [pid 1563] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1558] <... futex resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 1564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1563] <... mprotect resumed>) = 0 [pid 1558] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1564] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1563] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1558] <... futex resumed>) = 0 [ 29.224670][ T1553] loop4: detected capacity change from 0 to 2048 [ 29.252674][ T1557] loop3: detected capacity change from 0 to 2048 [ 29.253773][ T1562] loop0: detected capacity change from 0 to 2048 [ 29.259443][ T1554] loop1: detected capacity change from 0 to 2048 [pid 1564] sendfile(5, 7, NULL, 140737974943952 [pid 1558] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1566 ./strace-static-x86_64: Process 1567 attached ./strace-static-x86_64: Process 1565 attached [pid 1564] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1563] <... clone resumed>, parent_tid=[1567], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1567 [pid 1562] <... ioctl resumed>) = 0 [pid 1557] <... ioctl resumed>) = 0 [pid 1554] <... ioctl resumed>) = 0 [pid 1553] close(3 [pid 1563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1554] close(3 [pid 1563] <... futex resumed>) = 0 [pid 1554] <... close resumed>) = 0 [pid 1563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1554] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1565] set_robust_list(0x7f6fa100b9e0, 24 [pid 1554] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1567] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1565] <... set_robust_list resumed>) = 0 [pid 1564] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1562] close(3 [pid 1557] close(6 [pid 1553] <... close resumed>) = 0 [pid 1553] mkdir("./bus", 0777 [pid 1567] <... set_robust_list resumed>) = 0 [pid 1565] memfd_create("syzkaller", 0 [pid 1564] <... futex resumed>) = 1 [pid 1562] <... close resumed>) = 0 [pid 1558] <... futex resumed>) = 0 [pid 1557] <... close resumed>) = 0 [pid 1553] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1553] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1567] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1565] <... memfd_create resumed>) = 3 [pid 1557] mkdir("./bus", 0777 [pid 1565] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1567] <... open resumed>) = 4 [pid 1567] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1565] <... mmap resumed>) = 0x7f6f98bca000 [pid 1557] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1567] <... futex resumed>) = 1 [pid 1563] <... futex resumed>) = 0 [pid 1557] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1566 attached [pid 1566] set_robust_list(0x5555564066e0, 24) = 0 [pid 1563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1566] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1566] setpgid(0, 0) = 0 [pid 1566] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1567] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1567] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1563] <... futex resumed>) = 0 [pid 1567] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1566] <... openat resumed>) = 3 [pid 1567] <... open resumed>) = 5 [pid 1563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1567] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1563] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1567] <... futex resumed>) = 0 [pid 1564] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1567] openat(-1, "/proc/self/exe", O_RDONLY [pid 1563] <... futex resumed>) = 0 [pid 1562] mkdir("./bus", 0777 [pid 1563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1566] write(3, "1000", 4) = 4 [pid 1567] <... openat resumed>) = 6 [pid 1562] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1566] close(3) = 0 [pid 1566] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1566] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1566] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1566] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1567] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1565] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1562] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1567] <... futex resumed>) = 1 [pid 1563] <... futex resumed>) = 0 [pid 1563] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1563] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1566] <... clone resumed>, parent_tid=[1569], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1569 [pid 1566] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1567] sendfile(5, 6, NULL, 140737974943952 [pid 1566] <... futex resumed>) = 0 [pid 1566] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1566] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1567] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1566] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1566] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1566] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1567] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1563] <... futex resumed>) = 0 [pid 1566] <... clone resumed>, parent_tid=[1570], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1570 [pid 1567] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1566] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1566] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1569 attached [pid 1569] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1569] memfd_create("syzkaller", 0) = 3 [pid 1569] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1565] <... write resumed>) = 1048576 [pid 1565] munmap(0x7f6f98bca000, 1048576 [pid 1569] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1565] <... munmap resumed>) = 0 [ 29.268684][ T120] print_req_error: 14 callbacks suppressed [ 29.268700][ T120] blk_update_request: I/O error, dev loop0, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 29.288253][ T120] blk_update_request: I/O error, dev loop0, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [pid 1569] <... write resumed>) = 1048576 [pid 1569] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1569] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 1569] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1569] ioctl(4, LOOP_CLR_FD) = 0 [pid 1569] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1569] close(4) = 0 [pid 1569] close(3) = 0 [pid 1569] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1569] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1570 attached [pid 1570] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1570] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1570] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1566] <... futex resumed>) = 0 [pid 1566] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1566] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1569] <... futex resumed>) = 0 [pid 1569] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1569] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1566] <... futex resumed>) = 0 [pid 1566] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1566] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1569] <... futex resumed>) = 1 [pid 1569] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1569] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1566] <... futex resumed>) = 0 [pid 1566] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1566] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1569] <... futex resumed>) = 1 [pid 1569] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1569] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1566] <... futex resumed>) = 0 [pid 1566] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1566] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1569] <... futex resumed>) = 1 [pid 1569] sendfile(4, 5, NULL, 140737974943952 [pid 1570] <... futex resumed>) = 1 [pid 1570] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1565] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 1565] ioctl(7, LOOP_SET_FD, 3 [pid 1569] <... sendfile resumed>) = 1048576 [pid 1569] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1566] <... futex resumed>) = 0 [pid 1569] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1566] exit_group(0 [pid 1570] <... futex resumed>) = ? [pid 1569] <... futex resumed>) = ? [pid 1566] <... exit_group resumed>) = ? [pid 1570] +++ exited with 0 +++ [pid 1569] +++ exited with 0 +++ [pid 1566] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1566, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1578 [pid 1565] <... ioctl resumed>) = 0 [pid 1565] close(3) = 0 [pid 1565] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1565] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1553] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1553] ioctl(7, LOOP_CLR_FD) = 0 [ 29.335754][ T1553] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 29.353593][ T1565] loop5: detected capacity change from 0 to 2048 [ 29.361327][ T1554] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 29.361455][ T1557] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1553] close(7) = 0 ./strace-static-x86_64: Process 1578 attached [pid 1578] set_robust_list(0x5555564066e0, 24) = 0 [pid 1578] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1578] setpgid(0, 0) = 0 [pid 1578] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1578] write(3, "1000", 4) = 4 [pid 1578] close(3) = 0 [pid 1578] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1578] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1578] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1578] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1580], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1580 [pid 1578] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1578] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1578] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1578] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1578] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1581], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1581 [pid 1578] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1578] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1580 attached [pid 1580] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1580] memfd_create("syzkaller", 0) = 3 [pid 1580] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1580] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1580] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1580] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 1580] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1580] ioctl(4, LOOP_CLR_FD) = 0 [pid 1553] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1550] exit_group(0 [pid 1556] <... futex resumed>) = ? [pid 1550] <... exit_group resumed>) = ? [pid 1556] +++ exited with 0 +++ [pid 1580] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1580] close(4 [pid 1553] <... futex resumed>) = ? [pid 1580] <... close resumed>) = 0 [pid 1580] close(3 [pid 1553] +++ exited with 0 +++ [pid 1550] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1550, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR./strace-static-x86_64: Process 1581 attached [pid 1581] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1581] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1581] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1578] <... futex resumed>) = 0 [pid 1578] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1578] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1581] <... futex resumed>) = 1 [pid 1581] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1581] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1578] <... futex resumed>) = 0 [pid 1580] <... close resumed>) = 0 [pid 1578] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1578] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1581] <... futex resumed>) = 1 [pid 1581] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1581] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1578] <... futex resumed>) = 0 [pid 1578] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1578] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1581] <... futex resumed>) = 1 [pid 1581] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1581] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1578] <... futex resumed>) = 0 [pid 1578] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1578] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1581] <... futex resumed>) = 1 [pid 1581] sendfile(4, 5, NULL, 140737974943952) = 1048576 [pid 1581] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1578] <... futex resumed>) = 0 [pid 1581] <... futex resumed>) = 1 [pid 1581] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1580] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1580] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1578] exit_group(0) = ? [pid 1581] <... futex resumed>) = ? [pid 1581] +++ exited with 0 +++ [pid 1580] <... futex resumed>) = ? [pid 1580] +++ exited with 0 +++ [pid 1578] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1578, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 409] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1583 attached [pid 1562] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1583 [pid 1562] ioctl(6, LOOP_CLR_FD) = 0 [pid 1562] close(6) = 0 [pid 1562] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1562] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1583] set_robust_list(0x5555564066e0, 24 [pid 1558] exit_group(0 [pid 1554] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1583] <... set_robust_list resumed>) = 0 [pid 1564] <... futex resumed>) = ? [pid 1562] <... futex resumed>) = ? [pid 1558] <... exit_group resumed>) = ? [pid 1554] ioctl(7, LOOP_CLR_FD [pid 1564] +++ exited with 0 +++ [pid 1562] +++ exited with 0 +++ [pid 1558] +++ exited with 0 +++ [pid 1554] <... ioctl resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1558, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1554] close(7) = 0 [pid 407] <... restart_syscall resumed>) = 0 [pid 1554] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 1554] <... futex resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1554] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1551] exit_group(0 [pid 407] <... ioctl resumed>) = 0 [pid 1555] <... futex resumed>) = ? [pid 1554] <... futex resumed>) = ? [pid 1551] <... exit_group resumed>) = ? [pid 407] close(3 [pid 1555] +++ exited with 0 +++ [pid 1554] +++ exited with 0 +++ [pid 407] <... close resumed>) = 0 [pid 1551] +++ exited with 0 +++ [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1551, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1584 [pid 1583] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1583] setpgid(0, 0) = 0 [pid 1557] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1585 [pid 1565] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1565] ioctl(7, LOOP_CLR_FD) = 0 [pid 1565] close(7 [pid 1583] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1565] <... close resumed>) = 0 [pid 1565] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1557] ioctl(7, LOOP_CLR_FD [pid 1583] <... openat resumed>) = 3 [pid 1565] <... futex resumed>) = 0 [pid 1557] <... ioctl resumed>) = 0 [pid 1583] write(3, "1000", 4 [pid 1565] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1557] close(7 [pid 1583] <... write resumed>) = 4 [pid 1563] exit_group(0 [pid 1557] <... close resumed>) = 0 [pid 1567] <... futex resumed>) = ? [pid 1563] <... exit_group resumed>) = ? [pid 1557] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1565] <... futex resumed>) = 230 [pid 1583] close(3 [pid 1567] +++ exited with 0 +++ [pid 1557] <... futex resumed>) = 0 [pid 1557] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1583] <... close resumed>) = 0 [pid 1583] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1549] exit_group(0 [pid 1559] <... futex resumed>) = ? [pid 1557] <... futex resumed>) = ? [pid 1549] <... exit_group resumed>) = ? [pid 1583] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1559] +++ exited with 0 +++ ./strace-static-x86_64: Process 1584 attached ./strace-static-x86_64: Process 1585 attached [pid 1583] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1583] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1583] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1584] set_robust_list(0x5555564066e0, 24) = 0 ./strace-static-x86_64: Process 1586 attached [pid 1585] set_robust_list(0x5555564066e0, 24 [pid 1584] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1584] setpgid(0, 0) = 0 [pid 1586] set_robust_list(0x7f6fa100b9e0, 24 [pid 1585] <... set_robust_list resumed>) = 0 [pid 1584] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1583] <... clone resumed>, parent_tid=[1586], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1586 [pid 1585] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1584] <... openat resumed>) = 3 [pid 1583] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1586] <... set_robust_list resumed>) = 0 [pid 1585] <... prctl resumed>) = 0 [pid 1584] write(3, "1000", 4 [pid 1583] <... futex resumed>) = 0 [pid 1586] memfd_create("syzkaller", 0 [pid 1585] setpgid(0, 0 [pid 1584] <... write resumed>) = 4 [pid 1583] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1585] <... setpgid resumed>) = 0 [pid 1584] close(3 [pid 1583] <... futex resumed>) = 0 [pid 1585] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1584] <... close resumed>) = 0 [pid 1583] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1584] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1583] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1584] <... futex resumed>) = 0 [pid 1583] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1585] <... openat resumed>) = 3 [pid 1583] <... mprotect resumed>) = 0 [pid 1584] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1585] write(3, "1000", 4 [pid 1583] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1584] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1584] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1585] <... write resumed>) = 4 [pid 1583] <... clone resumed>, parent_tid=[1587], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1587 [pid 1585] close(3 [pid 1583] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1585] <... close resumed>) = 0 [pid 1584] <... mprotect resumed>) = 0 [pid 1583] <... futex resumed>) = 0 [pid 1586] <... memfd_create resumed>) = 3 [pid 1585] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1584] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1583] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1585] <... futex resumed>) = 0 [pid 1586] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1585] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1584] <... clone resumed>, parent_tid=[1588], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1588 [pid 1585] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1584] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1586] <... mmap resumed>) = 0x7f6f98bca000 [pid 1585] <... mprotect resumed>) = 0 [pid 1584] <... futex resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 1584] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1584] <... futex resumed>) = 0 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1584] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 408] close(3 [pid 1584] <... mmap resumed>) = 0x7f6fa0fca000 [pid 408] <... close resumed>) = 0 [pid 1584] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1584] <... mprotect resumed>) = 0 [pid 1584] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1589 [pid 1584] <... clone resumed>, parent_tid=[1590], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1590 [pid 1584] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1584] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1587 attached [pid 1587] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1587] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1589 attached [pid 1589] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 1590 attached ) = 0 [pid 1590] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1589] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1590] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 1588 attached [pid 1590] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1588] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1588] memfd_create("syzkaller", 0 [pid 1589] <... prctl resumed>) = 0 [pid 1589] setpgid(0, 0 [pid 1588] <... memfd_create resumed>) = 4 [pid 1589] <... setpgid resumed>) = 0 [pid 1589] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1588] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1565] +++ exited with 0 +++ [pid 1563] +++ exited with 0 +++ [pid 1589] <... openat resumed>) = 3 [pid 1589] write(3, "1000", 4) = 4 [pid 1589] close(3) = 0 [pid 1589] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1589] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1589] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1589] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1591], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1591 [pid 1589] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1589] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1589] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1589] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1589] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1563, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1589] <... clone resumed>, parent_tid=[1592], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1592 [pid 412] <... openat resumed>) = 3 [pid 1589] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1589] <... futex resumed>) = 0 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1589] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] close(3 [pid 1585] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1594 [pid 1585] <... clone resumed>, parent_tid=[1593], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1593 [ 29.397857][ T1562] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 29.419987][ T1565] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1585] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1585] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1588] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1585] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1585] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1585] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1595], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1595 [pid 1585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1592 attached [pid 1592] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1592] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1591 attached [pid 1591] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1591] memfd_create("syzkaller", 0) = 4 [pid 1591] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1594 attached [pid 1594] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 1595 attached [pid 1595] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1595] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1593 attached [pid 1594] <... set_robust_list resumed>) = 0 [pid 1594] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1593] set_robust_list(0x7f6fa100b9e0, 24 [pid 1594] <... prctl resumed>) = 0 [pid 1593] <... set_robust_list resumed>) = 0 [pid 1594] setpgid(0, 0 [pid 1593] memfd_create("syzkaller", 0 [pid 1586] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1594] <... setpgid resumed>) = 0 [pid 1593] <... memfd_create resumed>) = 4 [pid 1588] <... write resumed>) = 1048576 [pid 1594] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1593] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1588] munmap(0x7f6f98bca000, 1048576 [pid 1594] <... openat resumed>) = 3 [pid 1588] <... munmap resumed>) = 0 [pid 1593] <... mmap resumed>) = 0x7f6f98bca000 [pid 1588] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1594] write(3, "1000", 4 [pid 1588] <... openat resumed>) = 5 [pid 1588] ioctl(5, LOOP_SET_FD, 4 [pid 1594] <... write resumed>) = 4 [pid 1593] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1586] <... write resumed>) = 1048576 [pid 1588] <... ioctl resumed>) = 0 [pid 1588] close(4) = 0 [pid 1594] close(3 [pid 1588] mkdir("./bus", 0777 [pid 1594] <... close resumed>) = 0 [pid 1588] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1588] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1594] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1594] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1594] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1594] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1596], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1596 [pid 1594] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1594] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1594] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1594] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1594] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1586] munmap(0x7f6f98bca000, 1048576 [pid 1594] <... clone resumed>, parent_tid=[1597], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1597 [pid 1594] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1594] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1586] <... munmap resumed>) = 0 [pid 1586] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1591] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1593] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1596 attached [pid 1593] munmap(0x7f6f98bca000, 1048576 [pid 1596] set_robust_list(0x7f6fa100b9e0, 24 [pid 1593] <... munmap resumed>) = 0 [pid 1596] <... set_robust_list resumed>) = 0 [pid 1596] memfd_create("syzkaller", 0 [pid 1595] <... open resumed>) = 3 [pid 1593] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1592] <... open resumed>) = 3 [pid 1590] <... open resumed>) = 3 [pid 1587] <... open resumed>) = 4 [pid 1557] +++ exited with 0 +++ [pid 1549] +++ exited with 0 +++ [pid 1595] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1590] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1587] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1595] <... futex resumed>) = 1 [pid 1592] <... futex resumed>) = 1 [pid 1590] <... futex resumed>) = 1 [pid 1589] <... futex resumed>) = 0 [pid 1587] <... futex resumed>) = 1 [pid 1585] <... futex resumed>) = 0 [pid 1584] <... futex resumed>) = 0 [pid 1595] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1592] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1590] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1589] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1587] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1584] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1595] <... mount resumed>) = 0 [pid 1592] <... mount resumed>) = 0 [pid 1590] <... mount resumed>) = 0 [pid 1589] <... futex resumed>) = 0 [pid 1585] <... futex resumed>) = 0 [pid 1584] <... futex resumed>) = 0 [pid 1595] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1590] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1589] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1584] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1595] <... futex resumed>) = 0 [pid 1592] <... futex resumed>) = 0 [pid 1590] <... futex resumed>) = 0 [pid 1589] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1585] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1584] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1595] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1592] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1590] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1589] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1584] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1595] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1592] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1590] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1589] <... futex resumed>) = 0 [pid 1585] <... futex resumed>) = 0 [pid 1584] <... futex resumed>) = 0 [pid 1595] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1592] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1590] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1589] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1584] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1595] <... open resumed>) = 5 [pid 1592] <... open resumed>) = 5 [pid 1590] <... open resumed>) = 4 [pid 1595] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1590] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1595] <... futex resumed>) = 1 [pid 1592] <... futex resumed>) = 1 [pid 1590] <... futex resumed>) = 1 [pid 1589] <... futex resumed>) = 0 [pid 1585] <... futex resumed>) = 0 [pid 1584] <... futex resumed>) = 0 [pid 1595] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1592] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1590] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1589] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1584] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1595] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1592] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1590] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1589] <... futex resumed>) = 0 [pid 1585] <... futex resumed>) = 0 [pid 1584] <... futex resumed>) = 0 [pid 1595] openat(-1, "/proc/self/exe", O_RDONLY [pid 1592] openat(-1, "/proc/self/exe", O_RDONLY [pid 1590] openat(-1, "/proc/self/exe", O_RDONLY [pid 1589] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1584] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1595] <... openat resumed>) = 6 [pid 1592] <... openat resumed>) = 6 [pid 1590] <... openat resumed>) = 6 [pid 1595] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1590] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1595] <... futex resumed>) = 1 [pid 1592] <... futex resumed>) = 1 [pid 1590] <... futex resumed>) = 1 [pid 1589] <... futex resumed>) = 0 [pid 1585] <... futex resumed>) = 0 [pid 1584] <... futex resumed>) = 0 [pid 1595] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1592] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1590] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1589] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1585] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1584] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1595] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1592] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1590] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1589] <... futex resumed>) = 0 [pid 1585] <... futex resumed>) = 0 [pid 1584] <... futex resumed>) = 0 [pid 1595] sendfile(5, 6, NULL, 140737974943952 [pid 1592] sendfile(5, 6, NULL, 140737974943952 [pid 1590] sendfile(4, 6, NULL, 140737974943952 [pid 1589] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1586] <... openat resumed>) = 5 [pid 1585] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1584] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1596] <... memfd_create resumed>) = 3 [pid 1593] <... openat resumed>) = 7 [pid 1583] <... futex resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1549, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1596] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1593] ioctl(7, LOOP_SET_FD, 4 [pid 1586] ioctl(5, LOOP_SET_FD, 3 [pid 1583] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1597 attached [pid 1597] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1597] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1594] <... futex resumed>) = 0 [pid 1594] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1597] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1597] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1591] <... write resumed>) = 1048576 [pid 1591] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1591] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 7 [pid 1591] ioctl(7, LOOP_SET_FD, 4 [pid 1594] <... futex resumed>) = 1 [pid 1587] <... futex resumed>) = 0 [pid 1583] <... futex resumed>) = 1 [pid 1587] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1587] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1587] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1597] <... futex resumed>) = 0 [ 29.490274][ T1588] loop0: detected capacity change from 0 to 2048 [ 29.521313][ T1586] loop2: detected capacity change from 0 to 2048 [ 29.523178][ T1591] loop1: detected capacity change from 0 to 2048 [ 29.527803][ T1593] loop4: detected capacity change from 0 to 2048 [pid 1597] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1596] <... mmap resumed>) = 0x7f6f98bca000 [pid 1594] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1586] <... ioctl resumed>) = 0 [pid 1583] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1596] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1586] close(3 [pid 1583] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 410] <... openat resumed>) = 3 [pid 1594] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1583] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1594] <... futex resumed>) = 1 [pid 1587] <... futex resumed>) = 0 [pid 1583] <... futex resumed>) = 1 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1594] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1597] <... futex resumed>) = 0 [pid 1596] <... write resumed>) = 1048576 [pid 1587] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1586] <... close resumed>) = 0 [pid 1583] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] close(3 [pid 1589] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1585] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1584] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1597] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1587] <... open resumed>) = 3 [pid 410] <... close resumed>) = 0 [pid 1587] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1587] <... futex resumed>) = 1 [pid 1583] <... futex resumed>) = 0 [pid 1591] <... ioctl resumed>) = 0 [pid 1591] close(4 [pid 1583] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1591] <... close resumed>) = 0 [pid 1591] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1583] <... futex resumed>) = 0 [pid 1587] openat(-1, "/proc/self/exe", O_RDONLY [pid 1591] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1588] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1583] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1587] <... openat resumed>) = 6 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1601 [pid 1587] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1583] <... futex resumed>) = 0 [pid 1587] sendfile(3, 6, NULL, 140737974943952 [pid 1583] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1588] ioctl(5, LOOP_CLR_FD [pid 1583] <... futex resumed>) = 0 [pid 1583] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1588] <... ioctl resumed>) = 0 [pid 1588] close(5) = 0 [pid 1588] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1588] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1597] <... open resumed>) = 5 [pid 1593] <... ioctl resumed>) = 0 [pid 1593] close(4) = 0 [pid 1593] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1593] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1601 attached [pid 1597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1596] munmap(0x7f6f98bca000, 1048576 [pid 1587] <... sendfile resumed>) = 1048576 [pid 1586] mkdir("./bus", 0777 [pid 1597] <... futex resumed>) = 1 [pid 1594] <... futex resumed>) = 0 [pid 1587] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1586] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1597] openat(-1, "/proc/self/exe", O_RDONLY [pid 1594] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1587] <... futex resumed>) = 1 [pid 1583] <... futex resumed>) = 0 [pid 1594] <... futex resumed>) = 0 [pid 1587] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1597] <... openat resumed>) = 6 [pid 1594] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1597] <... futex resumed>) = 0 [pid 1594] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1597] sendfile(5, 6, NULL, 140737974943952 [pid 1594] <... futex resumed>) = 0 [pid 1595] <... sendfile resumed>) = 1048576 [pid 1594] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1595] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1595] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1592] <... sendfile resumed>) = 1048576 [pid 1592] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1590] <... sendfile resumed>) = 1048576 [pid 1592] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1590] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1590] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1584] exit_group(0 [pid 1590] <... futex resumed>) = ? [pid 1588] <... futex resumed>) = ? [pid 1584] <... exit_group resumed>) = ? [pid 1590] +++ exited with 0 +++ [pid 1588] +++ exited with 0 +++ [pid 1584] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1584, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1605 [pid 1597] <... sendfile resumed>) = 1048576 [pid 1597] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1594] <... futex resumed>) = 0 [pid 1597] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1596] <... munmap resumed>) = 0 [ 29.534606][ T1599] EXT4-fs warning (device loop0): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 29.555973][ T1588] EXT4-fs (loop0): get root inode failed [ 29.563350][ T1588] EXT4-fs (loop0): mount failed [ 29.579482][ T1591] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1586] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1596] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1601] set_robust_list(0x5555564066e0, 24) = 0 [pid 1601] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1591] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1591] ioctl(7, LOOP_CLR_FD) = 0 [pid 1591] close(7) = 0 [pid 1591] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1601] <... prctl resumed>) = 0 [pid 1596] <... openat resumed>) = 7 [pid 1591] <... futex resumed>) = 0 [pid 1601] setpgid(0, 0 [pid 1596] ioctl(7, LOOP_SET_FD, 3 [pid 1591] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1589] exit_group(0 [pid 1592] <... futex resumed>) = ? [pid 1589] <... exit_group resumed>) = ? [pid 1592] +++ exited with 0 +++ [pid 1601] <... setpgid resumed>) = 0 [pid 1601] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1591] <... futex resumed>) = ? [pid 1601] <... openat resumed>) = 3 [pid 1601] write(3, "1000", 4 [pid 1591] +++ exited with 0 +++ [pid 1589] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1589, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1601] <... write resumed>) = 4 [pid 1601] close(3) = 0 [pid 1601] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1601] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1601] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1601] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1606], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1606 [pid 1601] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1601] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1601] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1601] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1601] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1607], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1607 [pid 1601] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1601] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1607 attached [pid 1607] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1607] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 408] <... restart_syscall resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1609 [pid 1607] <... open resumed>) = 3 [pid 1607] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1601] <... futex resumed>) = 0 [pid 1601] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1601] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1607] <... futex resumed>) = 1 [pid 1607] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 1606 attached [pid 1606] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1606] memfd_create("syzkaller", 0 [pid 1607] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1601] <... futex resumed>) = 0 [pid 1601] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1601] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1607] <... futex resumed>) = 1 [pid 1607] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1606] <... memfd_create resumed>) = 5 [pid 1606] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1607] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1601] <... futex resumed>) = 0 [pid 1601] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1601] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1607] <... futex resumed>) = 1 [pid 1607] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1607] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1601] <... futex resumed>) = 0 [pid 1601] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1601] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1607] <... futex resumed>) = 1 [pid 1607] sendfile(4, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 1607] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1601] <... futex resumed>) = 0 [pid 1607] <... futex resumed>) = 1 [pid 1607] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1606] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1609 attached ) = 1048576 [pid 1606] munmap(0x7f6f98bca000, 1048576 [pid 1609] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 1605 attached ) = 0 [ 29.604617][ T1586] EXT4-fs (loop2): VFS: Can't find ext4 filesystem [ 29.626075][ T1596] loop5: detected capacity change from 0 to 2048 [pid 1609] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1605] set_robust_list(0x5555564066e0, 24 [pid 1586] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1586] ioctl(5, LOOP_CLR_FD [pid 1609] <... prctl resumed>) = 0 [pid 1605] <... set_robust_list resumed>) = 0 [pid 1586] <... ioctl resumed>) = 0 [pid 1609] setpgid(0, 0 [pid 1605] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1609] <... setpgid resumed>) = 0 [pid 1605] <... prctl resumed>) = 0 [pid 1609] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1605] setpgid(0, 0 [pid 1609] <... openat resumed>) = 3 [pid 1605] <... setpgid resumed>) = 0 [pid 1586] close(5) = 0 [pid 1609] write(3, "1000", 4 [pid 1606] <... munmap resumed>) = 0 [pid 1605] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1586] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1583] exit_group(0 [pid 1609] <... write resumed>) = 4 [pid 1606] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1605] <... openat resumed>) = 3 [pid 1587] <... futex resumed>) = ? [pid 1583] <... exit_group resumed>) = ? [pid 1609] close(3 [pid 1606] <... openat resumed>) = 7 [pid 1605] write(3, "1000", 4 [pid 1596] <... ioctl resumed>) = 0 [pid 1593] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1587] +++ exited with 0 +++ [pid 1586] +++ exited with 0 +++ [pid 1583] +++ exited with 0 +++ [pid 1609] <... close resumed>) = 0 [pid 1606] ioctl(7, LOOP_SET_FD, 5 [pid 1605] <... write resumed>) = 4 [pid 1596] close(3 [pid 1593] ioctl(7, LOOP_CLR_FD [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1583, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1609] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1605] close(3 [pid 1596] <... close resumed>) = 0 [pid 1593] <... ioctl resumed>) = 0 [pid 1609] <... futex resumed>) = 0 [pid 1605] <... close resumed>) = 0 [pid 1596] mkdir("./bus", 0777 [pid 1593] close(7 [pid 1609] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1605] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1596] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1593] <... close resumed>) = 0 [pid 1609] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1605] <... futex resumed>) = 0 [pid 1596] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1593] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1585] exit_group(0 [pid 1609] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1605] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1609] <... mprotect resumed>) = 0 [pid 1605] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1595] <... futex resumed>) = ? [pid 1593] <... futex resumed>) = ? [pid 1585] <... exit_group resumed>) = ? [pid 1609] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1605] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1595] +++ exited with 0 +++ [pid 1593] +++ exited with 0 +++ [pid 1585] +++ exited with 0 +++ [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1605] <... mprotect resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1585, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 409] <... openat resumed>) = 3 [pid 1609] <... clone resumed>, parent_tid=[1610], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1610 [pid 1605] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 409] ioctl(3, LOOP_CLR_FD [pid 1609] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... ioctl resumed>) = 0 [pid 1609] <... futex resumed>) = 0 [pid 1605] <... clone resumed>, parent_tid=[1611], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1611 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 409] close(3 [pid 1609] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1605] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... openat resumed>) = 3 [pid 409] <... close resumed>) = 0 [pid 1609] <... futex resumed>) = 0 [pid 1605] <... futex resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1609] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1605] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... ioctl resumed>) = 0 [pid 1609] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1605] <... futex resumed>) = 0 [pid 411] close(3 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1612 [pid 1609] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1605] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1609] <... mprotect resumed>) = 0 [pid 1605] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1609] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1605] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1609] <... clone resumed>, parent_tid=[1614], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1614 [pid 1605] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1609] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1605] <... clone resumed>, parent_tid=[1615], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1615 ./strace-static-x86_64: Process 1611 attached [pid 1609] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1605] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1611] set_robust_list(0x7f6fa100b9e0, 24 [pid 1605] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1610 attached [pid 1611] <... set_robust_list resumed>) = 0 [pid 1605] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1612 attached [pid 1611] memfd_create("syzkaller", 0 [pid 1610] set_robust_list(0x7f6fa100b9e0, 24 [pid 1612] set_robust_list(0x5555564066e0, 24 [pid 1611] <... memfd_create resumed>) = 3 [pid 1610] <... set_robust_list resumed>) = 0 [pid 1612] <... set_robust_list resumed>) = 0 [pid 1611] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1612] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1611] <... mmap resumed>) = 0x7f6f98bca000 [ 29.656357][ T1593] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 29.685248][ T1606] loop3: detected capacity change from 0 to 2048 [pid 1610] memfd_create("syzkaller", 0./strace-static-x86_64: Process 1615 attached [pid 1612] <... prctl resumed>) = 0 [pid 1610] <... memfd_create resumed>) = 3 [pid 1612] setpgid(0, 0 [pid 1611] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1606] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1614 attached [pid 1612] <... setpgid resumed>) = 0 [pid 1606] close(5 [pid 1614] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1612] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1606] <... close resumed>) = 0 [pid 1614] <... set_robust_list resumed>) = 0 [pid 1612] <... openat resumed>) = 3 [pid 1606] mkdir("./bus", 0777 [pid 1614] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1612] write(3, "1000", 4 [pid 1606] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1614] <... open resumed>) = 4 [pid 1612] <... write resumed>) = 4 [pid 1606] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1612] close(3 [pid 1615] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1614] <... futex resumed>) = 1 [pid 1612] <... close resumed>) = 0 [pid 1610] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1609] <... futex resumed>) = 0 [pid 1615] <... set_robust_list resumed>) = 0 [pid 1614] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1612] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1610] <... mmap resumed>) = 0x7f6f98bca000 [pid 1609] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1615] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1614] <... mount resumed>) = 0 [pid 1612] <... futex resumed>) = 0 [pid 1609] <... futex resumed>) = 0 [pid 1614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1612] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1609] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1614] <... futex resumed>) = 0 [pid 1612] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1609] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1614] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1612] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1609] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1614] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1612] <... mprotect resumed>) = 0 [pid 1609] <... futex resumed>) = 0 [pid 1614] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1612] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1609] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1614] <... open resumed>) = 5 [pid 1614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1612] <... clone resumed>, parent_tid=[1617], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1617 [pid 1615] <... open resumed>) = 4 [pid 1614] <... futex resumed>) = 1 [pid 1612] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1610] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1609] <... futex resumed>) = 0 [pid 1615] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1614] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1612] <... futex resumed>) = 0 [pid 1609] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1596] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1615] <... futex resumed>) = 1 [pid 1614] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1612] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1609] <... futex resumed>) = 0 [pid 1605] <... futex resumed>) = 0 [pid 1596] ioctl(7, LOOP_CLR_FD [pid 1615] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1614] openat(-1, "/proc/self/exe", O_RDONLY [pid 1612] <... futex resumed>) = 0 [pid 1609] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1605] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1615] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1614] <... openat resumed>) = 6 [pid 1612] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1605] <... futex resumed>) = 0 [pid 1615] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1612] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1605] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1615] <... mount resumed>) = 0 [pid 1614] <... futex resumed>) = 1 [pid 1612] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1609] <... futex resumed>) = 0 [pid 1615] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1614] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1612] <... mprotect resumed>) = 0 [pid 1610] <... write resumed>) = 1048576 [pid 1609] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1615] <... futex resumed>) = 1 [pid 1614] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1612] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1609] <... futex resumed>) = 0 [pid 1605] <... futex resumed>) = 0 [pid 1610] munmap(0x7f6f98bca000, 1048576 [pid 1615] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1614] sendfile(5, 6, NULL, 140737974943952 [pid 1609] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1605] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... close resumed>) = 0 ./strace-static-x86_64: Process 1617 attached [pid 1614] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1612] <... clone resumed>, parent_tid=[1618], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1618 [pid 1605] <... futex resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1617] set_robust_list(0x7f6fa100b9e0, 24 [pid 1614] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1612] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1605] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1617] <... set_robust_list resumed>) = 0 [pid 1614] <... futex resumed>) = 1 [pid 1612] <... futex resumed>) = 0 [pid 1609] <... futex resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1619 [pid 1617] memfd_create("syzkaller", 0 [pid 1614] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1612] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1617] <... memfd_create resumed>) = 3 [pid 1617] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1615] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1615] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1615] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1605] <... futex resumed>) = 0 [pid 1596] <... ioctl resumed>) = 0 [pid 1615] openat(-1, "/proc/self/exe", O_RDONLY [pid 1605] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1596] close(7 [pid 1605] <... futex resumed>) = 0 [pid 1596] <... close resumed>) = 0 [pid 1605] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1596] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1615] <... openat resumed>) = 6 [pid 1596] <... futex resumed>) = 0 [pid 1615] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1596] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1594] exit_group(0 [pid 1615] <... futex resumed>) = 1 [pid 1605] <... futex resumed>) = 0 [pid 1597] <... futex resumed>) = ? [pid 1596] <... futex resumed>) = ? [pid 1594] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1619 attached [pid 1617] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1615] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1605] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1597] +++ exited with 0 +++ [pid 1596] +++ exited with 0 +++ [pid 1594] +++ exited with 0 +++ [pid 1619] set_robust_list(0x5555564066e0, 24 [pid 1615] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1605] <... futex resumed>) = 0 [pid 1619] <... set_robust_list resumed>) = 0 [pid 1615] sendfile(5, 6, NULL, 140737974943952 [pid 1610] <... munmap resumed>) = 0 [pid 1605] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1594, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1619] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1610] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 1619] <... prctl resumed>) = 0 [pid 1610] <... openat resumed>) = 7 [pid 412] <... restart_syscall resumed>) = 0 [pid 1619] setpgid(0, 0 [pid 1610] ioctl(7, LOOP_SET_FD, 3./strace-static-x86_64: Process 1618 attached [pid 1619] <... setpgid resumed>) = 0 [ 29.714577][ T1596] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1619] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1618] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1617] <... write resumed>) = 1048576 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1619] <... openat resumed>) = 3 [pid 1618] <... set_robust_list resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 1619] write(3, "1000", 4 [pid 1618] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1619] <... write resumed>) = 4 [pid 1618] <... open resumed>) = 4 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1619] close(3 [pid 1618] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] close(3 [pid 1619] <... close resumed>) = 0 [pid 1618] <... futex resumed>) = 1 [pid 1612] <... futex resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 1619] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1618] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1612] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1619] <... futex resumed>) = 0 [pid 1618] <... mount resumed>) = 0 [pid 1612] <... futex resumed>) = 0 [pid 1619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1618] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1612] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1621 [pid 1619] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1618] <... futex resumed>) = 0 [pid 1612] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1619] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1618] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1612] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1619] <... mprotect resumed>) = 0 [pid 1618] <... open resumed>) = 5 [pid 1617] munmap(0x7f6f98bca000, 1048576 [pid 1612] <... futex resumed>) = 0 [pid 1619] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1618] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1617] <... munmap resumed>) = 0 [pid 1615] <... sendfile resumed>) = 1048576 [pid 1612] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1618] <... futex resumed>) = 0 [pid 1617] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1615] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1612] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1619] <... clone resumed>, parent_tid=[1622], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1622 [pid 1618] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1617] <... openat resumed>) = 6 [pid 1615] <... futex resumed>) = 1 [pid 1612] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1605] <... futex resumed>) = 0 [pid 1619] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1618] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1617] ioctl(6, LOOP_SET_FD, 3 [pid 1615] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1612] <... futex resumed>) = 0 [pid 1619] <... futex resumed>) = 0 [pid 1618] openat(-1, "/proc/self/exe", O_RDONLY [pid 1617] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1612] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1621 attached [pid 1619] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1618] <... openat resumed>) = 7 [pid 1617] ioctl(6, LOOP_CLR_FD [pid 1621] set_robust_list(0x5555564066e0, 24 [pid 1619] <... futex resumed>) = 0 [pid 1618] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1617] <... ioctl resumed>) = 0 [pid 1621] <... set_robust_list resumed>) = 0 [pid 1619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1618] <... futex resumed>) = 1 [pid 1612] <... futex resumed>) = 0 [pid 1611] <... write resumed>) = 1048576 [pid 1621] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1619] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1618] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1612] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1611] munmap(0x7f6f98bca000, 1048576 [pid 1621] <... prctl resumed>) = 0 [pid 1619] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1618] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1612] <... futex resumed>) = 0 [pid 1621] setpgid(0, 0 [pid 1619] <... mprotect resumed>) = 0 [pid 1618] sendfile(5, 7, NULL, 140737974943952 [pid 1617] ioctl(6, LOOP_SET_FD, 3 [pid 1612] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1611] <... munmap resumed>) = 0 ./strace-static-x86_64: Process 1622 attached [pid 1621] <... setpgid resumed>) = 0 [pid 1619] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1618] <... sendfile resumed>) = 1048576 [pid 1617] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1611] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1622] set_robust_list(0x7f6fa100b9e0, 24 [pid 1621] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1618] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1617] close(6 [pid 1611] <... openat resumed>) = 7 [pid 1622] <... set_robust_list resumed>) = 0 [pid 1621] <... openat resumed>) = 3 [pid 1619] <... clone resumed>, parent_tid=[1624], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1624 [pid 1618] <... futex resumed>) = 1 [pid 1617] <... close resumed>) = 0 [pid 1612] <... futex resumed>) = 0 [pid 1611] ioctl(7, LOOP_SET_FD, 3 [pid 1622] memfd_create("syzkaller", 0 [pid 1621] write(3, "1000", 4 [pid 1619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1618] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1617] close(3 [pid 1622] <... memfd_create resumed>) = 3 [pid 1621] <... write resumed>) = 4 [pid 1619] <... futex resumed>) = 0 [pid 1617] <... close resumed>) = 0 [pid 1611] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1622] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1621] close(3 [pid 1619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1617] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1622] <... mmap resumed>) = 0x7f6f98bca000 [pid 1621] <... close resumed>) = 0 [pid 1617] <... futex resumed>) = 0 [pid 1611] ioctl(7, LOOP_CLR_FD./strace-static-x86_64: Process 1624 attached [pid 1621] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1611] <... ioctl resumed>) = 0 [pid 1610] <... ioctl resumed>) = 0 [pid 1624] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1610] close(3 [pid 1624] <... set_robust_list resumed>) = 0 [pid 1610] <... close resumed>) = 0 [pid 1624] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1610] mkdir("./bus", 0777 [pid 1624] <... open resumed>) = 4 [pid 1610] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1624] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1610] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1624] <... futex resumed>) = 1 [pid 1612] exit_group(0 [pid 1619] <... futex resumed>) = 0 [pid 1624] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1611] ioctl(7, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1611] close(7 [pid 1622] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1621] <... futex resumed>) = 0 [pid 1619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1618] <... futex resumed>) = ? [pid 1612] <... exit_group resumed>) = ? [pid 1611] <... close resumed>) = 0 [pid 1611] close(3 [pid 1624] <... futex resumed>) = 0 [pid 1621] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1619] <... futex resumed>) = 1 [pid 1618] +++ exited with 0 +++ [pid 1617] +++ exited with 0 +++ [pid 1612] +++ exited with 0 +++ [pid 1611] <... close resumed>) = 0 [pid 1606] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1624] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1621] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1611] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1606] ioctl(7, LOOP_CLR_FD [pid 1624] <... mount resumed>) = 0 [pid 1622] <... write resumed>) = 1048576 [pid 1621] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1611] <... futex resumed>) = 0 [pid 1606] <... ioctl resumed>) = 0 [pid 1624] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1611] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1606] close(7 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1612, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1624] <... futex resumed>) = 1 [pid 1621] <... mprotect resumed>) = 0 [pid 1619] <... futex resumed>) = 0 [pid 1606] <... close resumed>) = 0 [pid 1605] exit_group(0 [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 1624] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1622] munmap(0x7f6f98bca000, 1048576 [pid 1606] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1606] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1615] <... futex resumed>) = ? [pid 1611] <... futex resumed>) = ? [pid 1605] <... exit_group resumed>) = ? [pid 1624] <... futex resumed>) = 0 [pid 1621] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1619] <... futex resumed>) = 1 [pid 1615] +++ exited with 0 +++ [pid 1611] +++ exited with 0 +++ [pid 409] <... restart_syscall resumed>) = 0 [pid 1624] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1601] exit_group(0 [pid 1624] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1607] <... futex resumed>) = ? [pid 1606] <... futex resumed>) = ? [pid 1601] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1625 attached [pid 1624] <... futex resumed>) = 0 [pid 1622] <... munmap resumed>) = 0 [pid 1619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1607] +++ exited with 0 +++ [pid 1606] +++ exited with 0 +++ [pid 1601] +++ exited with 0 +++ [pid 1624] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1625] set_robust_list(0x7f6fa100b9e0, 24 [pid 1622] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1621] <... clone resumed>, parent_tid=[1625], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1625 [pid 1619] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1625] <... set_robust_list resumed>) = 0 [pid 1622] <... openat resumed>) = 6 [pid 1621] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1601, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1625] memfd_create("syzkaller", 0 [ 29.759670][ T1610] loop1: detected capacity change from 0 to 2048 [ 29.789800][ T1606] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1622] ioctl(6, LOOP_SET_FD, 3 [pid 1621] <... futex resumed>) = 0 [pid 1619] <... futex resumed>) = 1 [pid 1624] <... futex resumed>) = 0 [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 409] <... openat resumed>) = 3 [pid 1625] <... memfd_create resumed>) = 3 [pid 1624] openat(-1, "/proc/self/exe", O_RDONLY) = 7 [pid 1624] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1624] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1621] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1621] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1621] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1621] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1628], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1628 [pid 1621] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1621] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 1619] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1624] <... futex resumed>) = 0 [pid 1619] <... futex resumed>) = 1 [pid 1624] sendfile(5, 7, NULL, 140737974943952 [pid 1619] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1628 attached [pid 1625] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1622] <... ioctl resumed>) = 0 [pid 410] <... restart_syscall resumed>) = 0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 1628] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1625] <... mmap resumed>) = 0x7f6f98bca000 [pid 1622] close(3 [pid 409] <... ioctl resumed>) = 0 [pid 1628] <... set_robust_list resumed>) = 0 [pid 1625] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1622] <... close resumed>) = 0 [pid 409] close(3 [pid 1628] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1625] <... write resumed>) = 1048576 [pid 1622] mkdir("./bus", 0777 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 409] <... close resumed>) = 0 [pid 1628] <... open resumed>) = 4 [pid 1622] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 410] <... openat resumed>) = 3 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1622] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 410] ioctl(3, LOOP_CLR_FD [pid 1628] <... futex resumed>) = 1 [pid 1621] <... futex resumed>) = 0 [pid 410] <... ioctl resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1629 [pid 1628] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1625] munmap(0x7f6f98bca000, 1048576 [pid 1621] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] close(3 [pid 1628] <... mount resumed>) = 0 [pid 1625] <... munmap resumed>) = 0 [pid 1621] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 1628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1625] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1621] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1628] <... futex resumed>) = 0 [pid 1625] <... openat resumed>) = 5 [pid 1621] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1628] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1625] ioctl(5, LOOP_SET_FD, 3 [pid 1621] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1630 [pid 1628] <... open resumed>) = 6 [pid 1621] <... futex resumed>) = 0 [pid 1628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1621] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1628] <... futex resumed>) = 0 [pid 1621] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1628] openat(-1, "/proc/self/exe", O_RDONLY [pid 1621] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1628] <... openat resumed>) = 7 [pid 1621] <... futex resumed>) = 0 [pid 1628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1621] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1628] <... futex resumed>) = 0 [pid 1621] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1628] sendfile(6, 7, NULL, 140737974943952 [pid 1621] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1630 attached ./strace-static-x86_64: Process 1629 attached [pid 1625] <... ioctl resumed>) = 0 [pid 1621] <... futex resumed>) = 0 [pid 1630] set_robust_list(0x5555564066e0, 24 [pid 1629] set_robust_list(0x5555564066e0, 24 [pid 1630] <... set_robust_list resumed>) = 0 [pid 1629] <... set_robust_list resumed>) = 0 [pid 1625] close(3 [pid 1630] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1629] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1630] <... prctl resumed>) = 0 [pid 1629] <... prctl resumed>) = 0 [pid 1625] <... close resumed>) = 0 [pid 1630] setpgid(0, 0 [pid 1629] setpgid(0, 0 [pid 1630] <... setpgid resumed>) = 0 [pid 1629] <... setpgid resumed>) = 0 [pid 1625] mkdir("./bus", 0777 [pid 1630] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1629] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1630] <... openat resumed>) = 3 [pid 1629] <... openat resumed>) = 3 [pid 1625] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1630] write(3, "1000", 4 [pid 1629] write(3, "1000", 4 [pid 1630] <... write resumed>) = 4 [pid 1629] <... write resumed>) = 4 [pid 1625] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1630] close(3 [pid 1629] close(3 [pid 1630] <... close resumed>) = 0 [pid 1629] <... close resumed>) = 0 [pid 1630] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1629] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1630] <... futex resumed>) = 0 [pid 1629] <... futex resumed>) = 0 [pid 1630] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1629] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1630] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1629] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1630] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1629] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1630] <... mprotect resumed>) = 0 [pid 1629] <... mprotect resumed>) = 0 [pid 1630] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1629] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1630] <... clone resumed>, parent_tid=[1631], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1631 [pid 1629] <... clone resumed>, parent_tid=[1632], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1632 [pid 1630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1629] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1630] <... futex resumed>) = 0 [pid 1629] <... futex resumed>) = 0 [pid 1630] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1629] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1630] <... futex resumed>) = 0 [pid 1629] <... futex resumed>) = 0 [pid 1630] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1629] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1630] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1629] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1630] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1629] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1630] <... mprotect resumed>) = 0 [pid 1629] <... mprotect resumed>) = 0 [pid 1630] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1629] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1630] <... clone resumed>, parent_tid=[1633], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1633 [pid 1629] <... clone resumed>, parent_tid=[1634], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1634 [pid 1630] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1630] <... futex resumed>) = 0 [pid 1629] <... futex resumed>) = 0 [pid 1630] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 29.818312][ T1622] loop4: detected capacity change from 0 to 2048 [ 29.823506][ T92] blk_update_request: I/O error, dev loop4, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 29.835121][ T1625] loop5: detected capacity change from 0 to 2048 [ 29.835620][ T92] blk_update_request: I/O error, dev loop4, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 29.842996][ T120] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [pid 1629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1624] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1624] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1619] <... futex resumed>) = 0 [pid 1624] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1621] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1631 attached [pid 1631] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1631] memfd_create("syzkaller", 0) = 3 [pid 1631] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1628] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1628] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1631] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1628] <... futex resumed>) = 1 [pid 1621] <... futex resumed>) = 0 [pid 1605] +++ exited with 0 +++ [pid 1631] <... write resumed>) = 1048576 [pid 1631] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1631] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 1631] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1631] ioctl(4, LOOP_CLR_FD) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1605, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1628] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1635 [pid 1631] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1631] close(4) = 0 [pid 1631] close(3 [pid 1610] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1610] ioctl(7, LOOP_CLR_FD) = 0 [pid 1610] close(7) = 0 [pid 1610] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1610] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1609] exit_group(0 [pid 1614] <... futex resumed>) = ? [pid 1609] <... exit_group resumed>) = ? [pid 1614] +++ exited with 0 +++ [pid 1610] <... futex resumed>) = ? ./strace-static-x86_64: Process 1635 attached [pid 1631] <... close resumed>) = 0 [pid 1631] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 29.860714][ T1610] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 29.863983][ T120] blk_update_request: I/O error, dev loop5, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 29.902429][ T1622] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1631] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1634 attached [pid 1634] set_robust_list(0x7f6fa0fea9e0, 24./strace-static-x86_64: Process 1633 attached ./strace-static-x86_64: Process 1632 attached [pid 1635] set_robust_list(0x5555564066e0, 24 [pid 1634] <... set_robust_list resumed>) = 0 [pid 1633] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1632] set_robust_list(0x7f6fa100b9e0, 24 [pid 1634] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1633] <... set_robust_list resumed>) = 0 [pid 1632] <... set_robust_list resumed>) = 0 [pid 1634] <... open resumed>) = 3 [pid 1633] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1632] memfd_create("syzkaller", 0 [pid 1634] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1633] <... open resumed>) = 3 [pid 1632] <... memfd_create resumed>) = 4 [pid 1634] <... futex resumed>) = 1 [pid 1633] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1632] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1634] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1633] <... futex resumed>) = 1 [pid 1632] <... mmap resumed>) = 0x7f6f98bca000 [pid 1633] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1635] <... set_robust_list resumed>) = 0 [pid 1635] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1635] setpgid(0, 0) = 0 [pid 1635] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1635] write(3, "1000", 4) = 4 [pid 1635] close(3) = 0 [pid 1635] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1635] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1635] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1635] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1640], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1640 [pid 1635] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1635] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1635] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1635] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1635] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1632] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1635] <... clone resumed>, parent_tid=[1641], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1641 [pid 1635] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1635] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1632] <... write resumed>) = 1048576 [pid 1632] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1632] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 5 [pid 1632] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1632] ioctl(5, LOOP_CLR_FD) = 0 [pid 1630] <... futex resumed>) = 0 [pid 1629] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1640 attached [pid 1640] set_robust_list(0x7f6fa100b9e0, 24 [pid 1629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1634] <... futex resumed>) = 0 [pid 1631] <... futex resumed>) = 0 [pid 1630] <... futex resumed>) = 1 [pid 1629] <... futex resumed>) = 1 [pid 1634] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1631] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1630] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1632] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1634] <... mount resumed>) = 0 [pid 1631] <... mount resumed>) = 0 [pid 1634] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1632] close(5 [pid 1634] <... futex resumed>) = 1 [pid 1631] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1629] <... futex resumed>) = 0 [pid 1634] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 1632] <... close resumed>) = 0 [pid 1631] <... futex resumed>) = 1 [pid 1630] <... futex resumed>) = 0 [pid 1629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1634] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1632] close(4 [pid 1631] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1629] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1641 attached [pid 1640] <... set_robust_list resumed>) = 0 [pid 1634] <... open resumed>) = 5 [pid 1631] <... open resumed>) = 4 [pid 1630] <... futex resumed>) = 0 [pid 1629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1622] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1634] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1631] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1630] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1629] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1622] ioctl(6, LOOP_CLR_FD [pid 1634] <... futex resumed>) = 0 [pid 1631] <... futex resumed>) = 0 [pid 1630] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1629] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1625] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1622] <... ioctl resumed>) = 0 [pid 1634] openat(-1, "/proc/self/exe", O_RDONLY [pid 1631] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1629] <... futex resumed>) = 0 [pid 1625] ioctl(5, LOOP_CLR_FD [pid 1622] close(6 [pid 1641] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1640] memfd_create("syzkaller", 0 [pid 1634] <... openat resumed>) = 4 [pid 1632] <... close resumed>) = 0 [pid 1631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1630] <... futex resumed>) = 0 [pid 1629] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1625] <... ioctl resumed>) = 0 [pid 1622] <... close resumed>) = 0 [pid 1641] <... set_robust_list resumed>) = 0 [pid 1640] <... memfd_create resumed>) = 3 [pid 1634] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1632] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1631] openat(-1, "/proc/self/exe", O_RDONLY [pid 1630] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1629] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1625] close(5 [pid 1622] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1619] exit_group(0 [pid 1641] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1640] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1634] <... futex resumed>) = 0 [pid 1632] <... futex resumed>) = 0 [pid 1631] <... openat resumed>) = 5 [pid 1629] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1625] <... close resumed>) = 0 [pid 1624] <... futex resumed>) = ? [pid 1622] <... futex resumed>) = ? [pid 1619] <... exit_group resumed>) = ? [pid 1641] <... open resumed>) = 4 [pid 1640] <... mmap resumed>) = 0x7f6f98bca000 [pid 1634] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1632] sendfile(5, 4, NULL, 140737974943952 [pid 1631] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1629] <... futex resumed>) = 0 [pid 1625] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1624] +++ exited with 0 +++ [pid 1622] +++ exited with 0 +++ [pid 1619] +++ exited with 0 +++ [pid 1641] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1631] <... futex resumed>) = 1 [pid 1630] <... futex resumed>) = 0 [pid 1629] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1625] <... futex resumed>) = 0 [pid 1621] exit_group(0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1619, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1641] <... futex resumed>) = 1 [pid 1635] <... futex resumed>) = 0 [pid 1631] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1630] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1628] <... futex resumed>) = ? [pid 1621] <... exit_group resumed>) = ? [pid 1641] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1635] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1630] <... futex resumed>) = 0 [pid 1628] +++ exited with 0 +++ [pid 1635] <... futex resumed>) = 0 [pid 1631] sendfile(4, 5, NULL, 140737974943952 [pid 1641] <... mount resumed>) = 0 [pid 1630] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1635] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1641] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1635] <... futex resumed>) = 0 [pid 1635] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1635] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1641] <... futex resumed>) = 1 [pid 1632] <... sendfile resumed>) = 1048576 [pid 1631] <... sendfile resumed>) = 1048576 [pid 1641] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1632] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1631] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1632] <... futex resumed>) = 1 [pid 1631] <... futex resumed>) = 1 [pid 1630] <... futex resumed>) = 0 [pid 1629] <... futex resumed>) = 0 [pid 1632] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1631] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1630] exit_group(0 [pid 1629] exit_group(0 [pid 1641] <... open resumed>) = 5 [pid 1634] <... futex resumed>) = ? [pid 1633] <... futex resumed>) = ? [pid 1632] <... futex resumed>) = ? [pid 1631] <... futex resumed>) = ? [pid 1630] <... exit_group resumed>) = ? [pid 1629] <... exit_group resumed>) = ? [pid 1634] +++ exited with 0 +++ [pid 1633] +++ exited with 0 +++ [pid 1640] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1631] +++ exited with 0 +++ [pid 1630] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1630, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1641] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1635] <... futex resumed>) = 0 [pid 1635] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1635] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1641] <... futex resumed>) = 1 [pid 1641] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1641] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1635] <... futex resumed>) = 0 [pid 1635] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1635] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1641] <... futex resumed>) = 1 [pid 1641] sendfile(5, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 1641] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1635] <... futex resumed>) = 0 [pid 1641] <... futex resumed>) = 1 [pid 1641] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1640] <... write resumed>) = 1048576 [pid 1640] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1640] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 7 [ 29.902481][ T1625] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1640] ioctl(7, LOOP_SET_FD, 3) = 0 [pid 1640] close(3) = 0 [pid 1640] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1640] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1625] +++ exited with 0 +++ [pid 1621] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1621, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 412] <... restart_syscall resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR./strace-static-x86_64: Process 1642 attached [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1642 [pid 1642] set_robust_list(0x5555564066e0, 24) = 0 [pid 1642] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1642] setpgid(0, 0) = 0 [pid 1642] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1642] write(3, "1000", 4) = 4 [pid 1642] close(3) = 0 [pid 1642] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1642] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1642] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1642] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1643], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1643 [pid 1642] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1642] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1642] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1642] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1642] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1644], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1644 [pid 1642] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1642] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1643 attached [pid 1643] set_robust_list(0x7f6fa100b9e0, 24) = 0 ./strace-static-x86_64: Process 1644 attached [pid 1643] memfd_create("syzkaller", 0) = 3 [pid 1643] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1644] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1644] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1644] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1642] <... futex resumed>) = 0 [pid 1644] <... futex resumed>) = 1 [pid 1644] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1642] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1642] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1644] <... mount resumed>) = 0 [pid 1644] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1642] <... futex resumed>) = 0 [pid 1644] <... futex resumed>) = 1 [pid 1642] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1644] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1642] <... futex resumed>) = 0 [pid 1642] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1644] <... open resumed>) = 5 [pid 1644] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1643] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1643] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1643] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 6 [pid 1643] ioctl(6, LOOP_SET_FD, 3 [pid 1644] <... futex resumed>) = 1 [pid 1642] <... futex resumed>) = 0 [pid 1632] +++ exited with 0 +++ [pid 1629] +++ exited with 0 +++ [pid 1610] +++ exited with 0 +++ [pid 1609] +++ exited with 0 +++ [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1647 [pid 1643] <... ioctl resumed>) = 0 [pid 1643] close(3 [pid 1642] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... openat resumed>) = 3 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1629, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1609, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1643] <... close resumed>) = 0 [pid 1643] mkdir("./bus", 0777 [pid 1644] openat(-1, "/proc/self/exe", O_RDONLY [pid 1643] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1642] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1644] <... openat resumed>) = 3 [pid 1642] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1643] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 1644] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [ 29.948701][ T1640] loop0: detected capacity change from 0 to 2048 [ 29.969734][ T1643] loop4: detected capacity change from 0 to 2048 [ 29.975474][ T1640] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1644] <... futex resumed>) = 1 [pid 1642] <... futex resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 408] <... openat resumed>) = 3 [pid 1642] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1644] sendfile(5, 3, NULL, 140737974943952 [pid 409] ioctl(3, LOOP_CLR_FD [pid 408] ioctl(3, LOOP_CLR_FD [pid 1642] <... futex resumed>) = 0 [pid 1642] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... ioctl resumed>) = 0 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) ./strace-static-x86_64: Process 1648 attached [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1648 [pid 409] close(3 [pid 408] close(3 [pid 409] <... close resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1647 attached [pid 1647] set_robust_list(0x5555564066e0, 24 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1649 [pid 1647] <... set_robust_list resumed>) = 0 [pid 1647] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1647] setpgid(0, 0) = 0 [pid 1647] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1650 [pid 1648] set_robust_list(0x5555564066e0, 24) = 0 [pid 1647] write(3, "1000", 4) = 4 [pid 1647] close(3) = 0 [pid 1647] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1647] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1647] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1647] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1651], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1651 [pid 1647] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1647] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1647] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1647] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1647] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1652], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1652 [pid 1647] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1647] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1650 attached [pid 1650] set_robust_list(0x5555564066e0, 24) = 0 [pid 1650] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1650] setpgid(0, 0) = 0 [pid 1650] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1650] write(3, "1000", 4) = 4 [pid 1650] close(3) = 0 [pid 1650] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1650] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1650] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1650] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1653], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1653 [pid 1650] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1650] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1650] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1650] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1650] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1654], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1654 [pid 1650] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1650] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1652 attached [pid 1652] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1652] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1648] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 1649 attached ./strace-static-x86_64: Process 1651 attached ) = 0 [pid 1651] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1651] memfd_create("syzkaller", 0 [pid 1648] setpgid(0, 0 [pid 1649] set_robust_list(0x5555564066e0, 24 [pid 1648] <... setpgid resumed>) = 0 [pid 1644] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1640] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1651] <... memfd_create resumed>) = 4 [pid 1651] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1652] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1651] <... mmap resumed>) = 0x7f6f98bca000 [pid 1647] <... futex resumed>) = 0 [pid 1647] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1647] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1652] <... futex resumed>) = 1 [pid 1652] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1651] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1649] <... set_robust_list resumed>) = 0 [pid 1648] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1644] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1640] ioctl(7, LOOP_CLR_FD [pid 1652] <... mount resumed>) = 0 [pid 1652] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1647] <... futex resumed>) = 0 [pid 1648] <... openat resumed>) = 3 [pid 1647] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1647] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1652] <... futex resumed>) = 1 [pid 1652] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1648] write(3, "1000", 4 [pid 1649] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1640] <... ioctl resumed>) = 0 [pid 1652] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1647] <... futex resumed>) = 0 [pid 1647] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1647] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1652] <... futex resumed>) = 1 [pid 1652] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1652] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1647] <... futex resumed>) = 0 [pid 1647] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1647] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1652] <... futex resumed>) = 1 [pid 1652] sendfile(5, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 1652] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1647] <... futex resumed>) = 0 [pid 1652] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1654 attached [pid 1654] set_robust_list(0x7f6fa0fea9e0, 24./strace-static-x86_64: Process 1653 attached ) = 0 [pid 1654] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1653] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1649] <... prctl resumed>) = 0 [pid 1648] <... write resumed>) = 4 [pid 1648] close(3 [pid 1649] setpgid(0, 0 [pid 1648] <... close resumed>) = 0 [pid 1649] <... setpgid resumed>) = 0 [pid 1648] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1654] <... open resumed>) = 3 [pid 1653] memfd_create("syzkaller", 0 [pid 1649] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1648] <... futex resumed>) = 0 [pid 1644] <... futex resumed>) = 1 [pid 1642] <... futex resumed>) = 0 [pid 1640] close(7 [pid 1654] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1653] <... memfd_create resumed>) = 4 [pid 1654] <... futex resumed>) = 1 [pid 1653] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1650] <... futex resumed>) = 0 [pid 1654] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1653] <... mmap resumed>) = 0x7f6f98bca000 [pid 1650] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1654] <... mount resumed>) = 0 [pid 1650] <... futex resumed>) = 0 [pid 1649] <... openat resumed>) = 3 [pid 1648] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1644] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1643] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1640] <... close resumed>) = 0 [pid 1654] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1650] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1654] <... futex resumed>) = 0 [pid 1650] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1654] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1650] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1649] write(3, "1000", 4 [pid 1648] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1643] ioctl(6, LOOP_CLR_FD [pid 1640] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1635] exit_group(0 [pid 1654] <... open resumed>) = 5 [pid 1650] <... futex resumed>) = 0 [pid 1654] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1650] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1654] <... futex resumed>) = 0 [pid 1650] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1654] openat(-1, "/proc/self/exe", O_RDONLY [pid 1650] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1654] <... openat resumed>) = 6 [pid 1650] <... futex resumed>) = 0 [pid 1649] <... write resumed>) = 4 [pid 1654] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1650] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1648] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1643] <... ioctl resumed>) = 0 [pid 1640] <... futex resumed>) = 0 [pid 1654] <... futex resumed>) = 0 [pid 1650] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1649] close(3 [pid 1641] <... futex resumed>) = ? [pid 1635] <... exit_group resumed>) = ? [pid 1654] sendfile(5, 6, NULL, 140737974943952 [pid 1650] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1654] <... sendfile resumed>) = 1048576 [pid 1651] <... write resumed>) = 1048576 [pid 1650] <... futex resumed>) = 0 [pid 1649] <... close resumed>) = 0 [pid 1648] <... mprotect resumed>) = 0 [pid 1643] close(6 [pid 1641] +++ exited with 0 +++ [pid 1640] +++ exited with 0 +++ [pid 1635] +++ exited with 0 +++ [pid 1654] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1653] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1650] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1654] <... futex resumed>) = 0 [pid 1650] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1654] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1649] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1648] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1643] <... close resumed>) = 0 [pid 1649] <... futex resumed>) = 0 [pid 1643] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1635, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1651] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1649] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1648] <... clone resumed>, parent_tid=[1655], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1655 [pid 1643] <... futex resumed>) = 0 [pid 1649] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1648] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1651] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [ 29.988273][ T1644] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 29.988390][ T1643] EXT4-fs (loop4): VFS: Can't find ext4 filesystem [ 30.008881][ T1644] File: /root/bus PID: 1644 Comm: syz-executor138 [pid 1651] ioctl(7, LOOP_SET_FD, 4 [pid 1649] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1648] <... futex resumed>) = 0 [pid 1643] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1642] exit_group(0 [pid 407] <... restart_syscall resumed>) = 0 [pid 1649] <... mprotect resumed>) = 0 [pid 1648] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1642] <... exit_group resumed>) = ? [pid 1644] <... futex resumed>) = 230 [pid 1649] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1648] <... futex resumed>) = 0 [pid 1643] <... futex resumed>) = ? [pid 1653] <... write resumed>) = 1048576 [pid 1648] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1644] +++ exited with 0 +++ [pid 1653] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1653] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 7 [pid 1653] ioctl(7, LOOP_SET_FD, 4 [pid 1643] +++ exited with 0 +++ [pid 1642] +++ exited with 0 +++ [pid 1648] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1653] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1642, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1648] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1653] ioctl(7, LOOP_CLR_FD) = 0 [pid 1651] <... ioctl resumed>) = 0 [pid 1651] close(4) = 0 [pid 1651] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1651] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1656 attached ./strace-static-x86_64: Process 1655 attached [pid 1649] <... clone resumed>, parent_tid=[1656], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1656 [pid 1648] <... mprotect resumed>) = 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 1649] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1653] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1653] close(7) = 0 [pid 1653] close(4 [pid 1656] set_robust_list(0x7f6fa100b9e0, 24 [pid 1655] set_robust_list(0x7f6fa100b9e0, 24 [pid 1649] <... futex resumed>) = 0 [pid 1648] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 407] ioctl(3, LOOP_CLR_FD [pid 1653] <... close resumed>) = 0 [pid 1653] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1653] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1650] exit_group(0 [pid 1654] <... futex resumed>) = ? [pid 1650] <... exit_group resumed>) = ? [pid 1654] +++ exited with 0 +++ [pid 1653] <... futex resumed>) = ? [pid 1649] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... ioctl resumed>) = 0 [pid 1649] <... futex resumed>) = 0 [pid 1648] <... clone resumed>, parent_tid=[1657], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1657 [pid 407] close(3 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1649] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0./strace-static-x86_64: Process 1657 attached [pid 407] <... close resumed>) = 0 [pid 1649] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1648] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1649] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 411] <... openat resumed>) = 3 [pid 1657] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1657] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1649] <... mprotect resumed>) = 0 [pid 1648] <... futex resumed>) = 0 [pid 1649] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1648] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 1649] <... clone resumed>, parent_tid=[1659], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1659 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1658 ./strace-static-x86_64: Process 1658 attached [pid 1649] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] close(3 [pid 1658] set_robust_list(0x5555564066e0, 24 [pid 1655] <... set_robust_list resumed>) = 0 [pid 1649] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 1658] <... set_robust_list resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1649] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1655] memfd_create("syzkaller", 0 [pid 1658] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1658] setpgid(0, 0) = 0 [pid 1655] <... memfd_create resumed>) = 4 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1660 [pid 1658] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1655] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1658] <... openat resumed>) = 3 [pid 1658] write(3, "1000", 4 [pid 1655] <... mmap resumed>) = 0x7f6f98bca000 [pid 1658] <... write resumed>) = 4 [pid 1658] close(3) = 0 [pid 1658] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1658] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1658] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1661], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1661 [pid 1658] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1658] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1658] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1662], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1662 [pid 1658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1660 attached [pid 1660] set_robust_list(0x5555564066e0, 24) = 0 [pid 1660] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1660] setpgid(0, 0) = 0 [pid 1660] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1660] write(3, "1000", 4) = 4 [pid 1660] close(3) = 0 [pid 1660] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1660] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1660] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1660] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1663], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1663 [pid 1660] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1660] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1660] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1660] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1660] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1665], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1665 [pid 1660] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1660] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1661 attached [pid 1661] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1661] memfd_create("syzkaller", 0) = 3 [pid 1656] <... set_robust_list resumed>) = 0 [pid 1661] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1656] memfd_create("syzkaller", 0 [pid 1655] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1656] <... memfd_create resumed>) = 3 ./strace-static-x86_64: Process 1665 attached [pid 1665] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1665] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1656] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1663 attached [pid 1663] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1663] memfd_create("syzkaller", 0) = 4 [pid 1663] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1656] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1661] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1655] <... write resumed>) = 1048576 [pid 1655] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1655] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 5 [ 30.048699][ T1651] loop5: detected capacity change from 0 to 2048 [pid 1655] ioctl(5, LOOP_SET_FD, 4 [pid 1663] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1661] <... write resumed>) = 1048576 [pid 1661] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1661] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1663] <... write resumed>) = 1048576 [pid 1663] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1663] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 5 [pid 1663] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1663] ioctl(5, LOOP_CLR_FD) = 0 [pid 1663] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1663] close(5) = 0 [pid 1663] close(4./strace-static-x86_64: Process 1659 attached ) = 0 [pid 1663] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1663] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1659] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1659] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1662 attached [pid 1656] <... write resumed>) = 1048576 [pid 1655] <... ioctl resumed>) = 0 [pid 1656] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1656] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 5 [pid 1656] ioctl(5, LOOP_SET_FD, 3 [pid 1665] <... open resumed>) = 3 [pid 1657] <... open resumed>) = 3 [pid 1653] +++ exited with 0 +++ [pid 1650] +++ exited with 0 +++ [pid 1665] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1662] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1661] <... openat resumed>) = 4 [pid 1659] <... open resumed>) = 4 [pid 1657] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1656] <... ioctl resumed>) = 0 [pid 1655] close(4 [pid 1665] <... futex resumed>) = 1 [pid 1662] <... set_robust_list resumed>) = 0 [pid 1661] ioctl(4, LOOP_SET_FD, 3 [pid 1660] <... futex resumed>) = 0 [pid 1659] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1657] <... futex resumed>) = 1 [pid 1655] <... close resumed>) = 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1650, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1665] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1662] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1660] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1659] <... futex resumed>) = 0 [pid 1657] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1655] mkdir("./bus", 0777 [pid 1649] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1648] <... futex resumed>) = 0 [pid 1659] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1649] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1648] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1659] <... mount resumed>) = 0 [pid 1649] <... futex resumed>) = 0 [pid 1648] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1659] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1649] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1648] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... openat resumed>) = 3 [pid 1659] <... futex resumed>) = 0 [pid 1649] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 409] ioctl(3, LOOP_CLR_FD [pid 1659] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1649] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1663] <... futex resumed>) = 0 [pid 1662] <... open resumed>) = 5 [pid 1661] <... ioctl resumed>) = 0 [pid 1660] <... futex resumed>) = 1 [pid 1659] <... open resumed>) = 6 [pid 1658] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1657] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1655] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1649] <... futex resumed>) = 0 [pid 409] close(3 [pid 1663] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1660] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1659] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1657] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1655] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1649] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... close resumed>) = 0 [pid 1663] <... mount resumed>) = 0 [pid 1662] <... futex resumed>) = 0 [pid 1659] <... futex resumed>) = 0 [pid 1658] <... futex resumed>) = 0 [pid 1657] <... mount resumed>) = 0 [pid 1649] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1663] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1662] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1659] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1657] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1649] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1663] <... futex resumed>) = 1 [pid 1662] <... mount resumed>) = 0 [pid 1661] close(3 [pid 1660] <... futex resumed>) = 0 [pid 1659] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1657] <... futex resumed>) = 1 [pid 1649] <... futex resumed>) = 0 [pid 1648] <... futex resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1668 [pid 1663] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1661] <... close resumed>) = 0 [pid 1660] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1659] openat(-1, "/proc/self/exe", O_RDONLY [pid 1657] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1649] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1648] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1663] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1662] <... futex resumed>) = 1 [pid 1661] mkdir("./bus", 0777 [pid 1660] <... futex resumed>) = 0 [pid 1659] <... openat resumed>) = 7 [pid 1658] <... futex resumed>) = 0 [pid 1657] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1648] <... futex resumed>) = 0 [pid 1663] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1662] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1661] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1660] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1659] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1657] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1648] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1663] <... open resumed>) = 4 [pid 1662] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1661] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1659] <... futex resumed>) = 1 [pid 1658] <... futex resumed>) = 0 [pid 1657] <... open resumed>) = 4 [pid 1649] <... futex resumed>) = 0 [pid 1663] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1662] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1659] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1657] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1649] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1663] <... futex resumed>) = 1 [pid 1662] <... open resumed>) = 3 [pid 1660] <... futex resumed>) = 0 [pid 1659] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1657] <... futex resumed>) = 1 [pid 1649] <... futex resumed>) = 0 [pid 1648] <... futex resumed>) = 0 [pid 1663] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1660] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1659] sendfile(6, 7, NULL, 140737974943952 [pid 1657] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1649] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1648] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1668 attached [pid 1663] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1662] <... futex resumed>) = 1 [pid 1660] <... futex resumed>) = 0 [pid 1658] <... futex resumed>) = 0 [pid 1657] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1656] close(3 [pid 1648] <... futex resumed>) = 0 [pid 1668] set_robust_list(0x5555564066e0, 24 [pid 1663] openat(-1, "/proc/self/exe", O_RDONLY [pid 1662] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1660] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1659] <... sendfile resumed>) = 1048576 [pid 1658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1657] openat(-1, "/proc/self/exe", O_RDONLY [pid 1656] <... close resumed>) = 0 [pid 1648] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1668] <... set_robust_list resumed>) = 0 [pid 1663] <... openat resumed>) = 5 [pid 1662] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1658] <... futex resumed>) = 0 [pid 1657] <... openat resumed>) = 6 [pid 1656] mkdir("./bus", 0777 [pid 1668] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1663] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1662] openat(-1, "/proc/self/exe", O_RDONLY [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1657] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1656] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1668] <... prctl resumed>) = 0 [pid 1663] <... futex resumed>) = 1 [pid 1662] <... openat resumed>) = 6 [pid 1660] <... futex resumed>) = 0 [pid 1657] <... futex resumed>) = 1 [pid 1656] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1648] <... futex resumed>) = 0 [pid 1668] setpgid(0, 0 [pid 1663] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1660] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1657] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1648] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1668] <... setpgid resumed>) = 0 [pid 1663] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1662] <... futex resumed>) = 1 [pid 1660] <... futex resumed>) = 0 [pid 1658] <... futex resumed>) = 0 [pid 1657] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1668] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1663] sendfile(4, 5, NULL, 140737974943952 [pid 1662] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1660] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1658] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1657] sendfile(4, 6, NULL, 140737974943952 [pid 1668] <... openat resumed>) = 3 [pid 1662] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1658] <... futex resumed>) = 0 [pid 1668] write(3, "1000", 4 [pid 1662] sendfile(3, 6, NULL, 140737974943952 [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1668] <... write resumed>) = 4 [pid 1668] close(3) = 0 [pid 1668] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1668] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1668] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1668] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1672], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1672 [pid 1668] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1668] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1668] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1668] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1668] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1673], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1673 [pid 1668] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 30.093812][ T1655] loop3: detected capacity change from 0 to 2048 [ 30.105092][ T1651] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 30.108420][ T1656] loop1: detected capacity change from 0 to 2048 [ 30.122518][ T1661] loop0: detected capacity change from 0 to 2048 [pid 1668] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1659] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1651] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1648] <... futex resumed>) = 0 [pid 1651] ioctl(7, LOOP_CLR_FD) = 0 [pid 1651] close(7) = 0 [pid 1651] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1647] exit_group(0 [pid 1652] <... futex resumed>) = ? [pid 1651] <... futex resumed>) = ? [pid 1647] <... exit_group resumed>) = ? [pid 1656] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1652] +++ exited with 0 +++ [pid 1651] +++ exited with 0 +++ [pid 1656] ioctl(5, LOOP_CLR_FD) = 0 [pid 1656] close(5) = 0 [pid 1656] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1656] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1672 attached [pid 1672] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1672] memfd_create("syzkaller", 0) = 3 [pid 1672] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1672] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1659] <... futex resumed>) = 1 [pid 1648] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1649] <... futex resumed>) = 0 [pid 1649] exit_group(0 [pid 1659] ????() = ? [pid 1649] <... exit_group resumed>) = ? [pid 1656] <... futex resumed>) = ? [pid 1656] +++ exited with 0 +++ [pid 1659] +++ exited with 0 +++ [pid 1649] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1649, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 1672] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1673 attached [pid 1673] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1673] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1672] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1668] <... futex resumed>) = 0 [pid 1668] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] close(3 [pid 1668] <... futex resumed>) = 0 [pid 1668] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] <... close resumed>) = 0 [pid 1673] <... futex resumed>) = 1 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1673] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1672] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 5 [pid 1672] ioctl(5, LOOP_SET_FD, 3 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1675 [pid 1673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1668] <... futex resumed>) = 0 [pid 1668] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1668] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1673] <... futex resumed>) = 1 [ 30.164978][ T1656] EXT4-fs (loop1): VFS: Can't find ext4 filesystem [ 30.173857][ T1655] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 30.179328][ T1671] EXT4-fs warning (device loop0): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 30.205110][ T1672] loop2: detected capacity change from 0 to 2048 [pid 1673] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1675 attached [pid 1675] set_robust_list(0x5555564066e0, 24) = 0 [pid 1675] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1675] setpgid(0, 0) = 0 [pid 1675] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1660] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1675] <... openat resumed>) = 3 [pid 1675] write(3, "1000", 4) = 4 [pid 1675] close(3 [pid 1658] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} [pid 1675] <... close resumed>) = 0 [pid 1658] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} [pid 1675] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1658] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1658] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} [pid 1675] <... futex resumed>) = 0 [pid 1675] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1658] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1673] <... open resumed>) = 6 [pid 1672] <... ioctl resumed>) = 0 [pid 1675] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1672] close(3 [pid 1663] <... sendfile resumed>) = 1048576 [pid 1655] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1663] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1655] ioctl(5, LOOP_CLR_FD [pid 1663] <... futex resumed>) = 0 [pid 1663] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1675] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1673] <... futex resumed>) = 1 [pid 1672] <... close resumed>) = 0 [pid 1668] <... futex resumed>) = 0 [pid 1647] +++ exited with 0 +++ [pid 1675] <... mprotect resumed>) = 0 [pid 1673] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1672] mkdir("./bus", 0777 [pid 1668] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1675] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1660] exit_group(0 [pid 1673] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1672] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1668] <... futex resumed>) = 0 [pid 1673] openat(-1, "/proc/self/exe", O_RDONLY [pid 1672] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1665] <... futex resumed>) = ? [pid 1660] <... exit_group resumed>) = ? [pid 1668] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1673] <... openat resumed>) = 3 [pid 1665] +++ exited with 0 +++ [pid 1663] <... futex resumed>) = ? [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1647, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1663] +++ exited with 0 +++ [pid 1662] <... sendfile resumed>) = 1048576 [pid 1660] +++ exited with 0 +++ [pid 1657] <... sendfile resumed>) = 1048576 ./strace-static-x86_64: Process 1676 attached [pid 1675] <... clone resumed>, parent_tid=[1676], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1676 [pid 1673] <... futex resumed>) = 1 [pid 1668] <... futex resumed>) = 0 [pid 1662] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1657] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1675] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1673] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1668] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1662] <... futex resumed>) = 0 [pid 1676] set_robust_list(0x7f6fa100b9e0, 24 [pid 1675] <... futex resumed>) = 0 [pid 1673] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1668] <... futex resumed>) = 0 [pid 1662] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1661] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1657] <... futex resumed>) = 1 [pid 1648] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1660, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1675] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1673] sendfile(6, 3, NULL, 140737974943952 [pid 1668] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1657] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1675] <... futex resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1675] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1675] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1675] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1677], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1677 [pid 1675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... openat resumed>) = 3 [pid 1676] <... set_robust_list resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1676] memfd_create("syzkaller", 0 [pid 1661] ioctl(4, LOOP_CLR_FD) = 0 [pid 1661] close(4) = 0 [pid 1676] <... memfd_create resumed>) = 3 [pid 1661] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1676] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1661] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1676] <... mmap resumed>) = 0x7f6f98bca000 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1658] exit_group(0 [pid 1662] <... futex resumed>) = ? [pid 1658] <... exit_group resumed>) = ? [pid 1662] +++ exited with 0 +++ [pid 412] close(3 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1661] <... futex resumed>) = ? [pid 1673] <... sendfile resumed>) = 1048576 [pid 1673] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1668] <... futex resumed>) = 0 [pid 1673] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1676] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1676] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1676] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 411] <... openat resumed>) = 3 [pid 412] <... close resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 411] close(3) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1678 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1679 ./strace-static-x86_64: Process 1678 attached [pid 1678] set_robust_list(0x5555564066e0, 24) = 0 [pid 1678] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1678] setpgid(0, 0) = 0 [pid 1678] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1678] write(3, "1000", 4) = 4 [pid 1678] close(3) = 0 [pid 1678] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1678] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1678] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1680], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1680 [pid 1678] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1678] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1678] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1678] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1681], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1681 [pid 1678] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1678] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1680 attached [pid 1680] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1680] memfd_create("syzkaller", 0) = 3 [pid 1680] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1679 attached ./strace-static-x86_64: Process 1677 attached [pid 1679] set_robust_list(0x5555564066e0, 24 [pid 1677] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1679] <... set_robust_list resumed>) = 0 [pid 1679] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1677] <... set_robust_list resumed>) = 0 [pid 1679] <... prctl resumed>) = 0 [pid 1677] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1679] setpgid(0, 0) = 0 [pid 1679] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1679] write(3, "1000", 4) = 4 [pid 1679] close(3) = 0 [pid 1679] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1679] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1677] <... open resumed>) = 5 [pid 1679] <... mmap resumed>) = 0x7f6fa0feb000 ./strace-static-x86_64: Process 1681 attached [pid 1677] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1679] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1677] <... futex resumed>) = 1 [pid 1675] <... futex resumed>) = 0 [pid 1675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1679] <... mprotect resumed>) = 0 [pid 1679] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1681] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1677] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1680] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1677] <... mount resumed>) = 0 [pid 1679] <... clone resumed>, parent_tid=[1682], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1682 [pid 1681] <... set_robust_list resumed>) = 0 [pid 1679] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1681] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1677] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1679] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1682 attached [pid 1681] <... open resumed>) = 4 [pid 1680] <... write resumed>) = 1048576 [pid 1677] <... futex resumed>) = 1 [pid 1676] <... openat resumed>) = 4 [pid 1675] <... futex resumed>) = 0 [pid 1672] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1661] +++ exited with 0 +++ [pid 1658] +++ exited with 0 +++ [pid 1655] <... ioctl resumed>) = 0 [pid 1655] close(5) = 0 [pid 1655] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1655] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [ 30.209255][ T1661] EXT4-fs (loop0): get root inode failed [ 30.223004][ T1661] EXT4-fs (loop0): mount failed [ 30.246424][ T1672] EXT4-fs warning (device loop2): read_mmp_block:107: Error -117 while reading MMP block 64 [pid 1680] munmap(0x7f6f98bca000, 1048576 [pid 1676] ioctl(4, LOOP_SET_FD, 3 [pid 1675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1648] exit_group(0 [pid 1675] <... futex resumed>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1658, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1680] <... munmap resumed>) = 0 [pid 1680] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 1680] ioctl(5, LOOP_SET_FD, 3 [pid 1681] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1679] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1677] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1676] <... ioctl resumed>) = 0 [pid 1675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1672] ioctl(5, LOOP_CLR_FD [pid 1648] <... exit_group resumed>) = ? [pid 1681] <... futex resumed>) = 1 [pid 1680] <... ioctl resumed>) = 0 [pid 1679] <... futex resumed>) = 0 [pid 1678] <... futex resumed>) = 0 [pid 1677] <... open resumed>) = 6 [pid 1676] close(3 [pid 1672] <... ioctl resumed>) = 0 [pid 1657] <... futex resumed>) = ? [pid 1655] <... futex resumed>) = ? [pid 1682] set_robust_list(0x7f6fa100b9e0, 24 [pid 1681] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1680] close(3 [pid 1679] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1678] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1677] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1676] <... close resumed>) = 0 [pid 1672] close(5 [pid 1657] +++ exited with 0 +++ [pid 1655] +++ exited with 0 +++ [pid 1648] +++ exited with 0 +++ [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1681] <... mount resumed>) = 0 [pid 1679] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1678] <... futex resumed>) = 0 [pid 1677] <... futex resumed>) = 1 [pid 1676] mkdir("./bus", 0777 [pid 1675] <... futex resumed>) = 0 [pid 1672] <... close resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1648, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 407] <... openat resumed>) = 3 [pid 1681] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1682] <... set_robust_list resumed>) = 0 [pid 1681] <... futex resumed>) = 0 [pid 1680] <... close resumed>) = 0 [pid 1679] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1678] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1677] openat(-1, "/proc/self/exe", O_RDONLY [pid 1676] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1672] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1681] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1679] <... mprotect resumed>) = 0 [pid 1678] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1668] exit_group(0 [pid 1675] <... futex resumed>) = 0 [pid 1678] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1673] <... futex resumed>) = ? [pid 1668] <... exit_group resumed>) = ? [pid 1677] <... openat resumed>) = 3 [pid 1676] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1678] <... futex resumed>) = 0 [pid 1673] +++ exited with 0 +++ [pid 1672] <... futex resumed>) = ? [pid 407] <... ioctl resumed>) = 0 [pid 1678] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1681] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1679] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1677] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1672] +++ exited with 0 +++ [pid 1668] +++ exited with 0 +++ [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 407] close(3 [pid 1681] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1668, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1681] <... open resumed>) = 3 [pid 1679] <... clone resumed>, parent_tid=[1683], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1683 [pid 1677] <... futex resumed>) = 1 [pid 1675] <... futex resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 1675] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1681] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1679] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1677] sendfile(6, 3, NULL, 140737974943952 [pid 1675] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1681] <... futex resumed>) = 1 [pid 1679] <... futex resumed>) = 0 [pid 1678] <... futex resumed>) = 0 [pid 1675] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1681] openat(-1, "/proc/self/exe", O_RDONLY [pid 1679] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1678] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1678] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] close(3 [pid 409] <... openat resumed>) = 3 [pid 410] <... close resumed>) = 0 [pid 1681] <... openat resumed>) = 6 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] ioctl(3, LOOP_CLR_FD [pid 1681] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... ioctl resumed>) = 0 [pid 1681] <... futex resumed>) = 1 [pid 1678] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1684 [pid 409] close(3 [pid 1681] sendfile(3, 6, NULL, 140737974943952 [pid 1678] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1678] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... close resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1685 ./strace-static-x86_64: Process 1683 attached ./strace-static-x86_64: Process 1685 attached ./strace-static-x86_64: Process 1684 attached [pid 1683] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1680] mkdir("./bus", 0777) = -1 EEXIST (File exists) [ 30.287577][ T1676] loop1: detected capacity change from 0 to 2048 [ 30.287723][ T1680] loop5: detected capacity change from 0 to 2048 [ 30.326342][ T1676] EXT4-fs warning (device loop1): read_mmp_block:107: Error -117 while reading MMP block 64 [pid 1680] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1685] set_robust_list(0x5555564066e0, 24 [pid 1684] set_robust_list(0x5555564066e0, 24 [pid 1683] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1682] memfd_create("syzkaller", 0 [pid 1676] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1676] ioctl(4, LOOP_CLR_FD) = 0 [pid 1676] close(4) = 0 [pid 1676] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1685] <... set_robust_list resumed>) = 0 [pid 1676] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1685] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1682] <... memfd_create resumed>) = 3 [pid 1683] <... open resumed>) = 4 [pid 1682] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1681] <... sendfile resumed>) = 1048576 [pid 1677] <... sendfile resumed>) = 1048576 [pid 407] <... close resumed>) = 0 [pid 1681] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1677] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1681] <... futex resumed>) = 1 [pid 1678] <... futex resumed>) = 0 [pid 1677] <... futex resumed>) = 1 [pid 1675] <... futex resumed>) = 0 [pid 1681] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1677] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1675] exit_group(0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1686 [pid 1685] <... prctl resumed>) = 0 [pid 1684] <... set_robust_list resumed>) = 0 [pid 1683] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1682] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1677] <... futex resumed>) = ? [pid 1675] <... exit_group resumed>) = ? [pid 1685] setpgid(0, 0 [pid 1684] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1683] <... futex resumed>) = 1 [pid 1679] <... futex resumed>) = 0 [pid 1677] +++ exited with 0 +++ [pid 1685] <... setpgid resumed>) = 0 [pid 1684] <... prctl resumed>) = 0 [pid 1683] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1679] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1676] <... futex resumed>) = ? [pid 1685] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1684] setpgid(0, 0 [pid 1683] <... mount resumed>) = 0 [pid 1679] <... futex resumed>) = 0 [pid 1685] <... openat resumed>) = 3 [pid 1684] <... setpgid resumed>) = 0 [pid 1683] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1679] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1685] write(3, "1000", 4 [pid 1684] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1683] <... futex resumed>) = 0 [pid 1679] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1685] <... write resumed>) = 4 [pid 1684] <... openat resumed>) = 3 [pid 1683] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1679] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1685] close(3 [pid 1684] write(3, "1000", 4 [pid 1683] <... open resumed>) = 5 [pid 1679] <... futex resumed>) = 0 [pid 1685] <... close resumed>) = 0 [pid 1684] <... write resumed>) = 4 [pid 1683] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1679] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1685] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1684] close(3 [pid 1683] <... futex resumed>) = 0 [pid 1679] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 1686 attached [pid 1685] <... futex resumed>) = 0 [pid 1684] <... close resumed>) = 0 [pid 1683] openat(-1, "/proc/self/exe", O_RDONLY [pid 1680] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1679] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1686] set_robust_list(0x5555564066e0, 24 [pid 1685] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1684] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1683] <... openat resumed>) = 6 [pid 1680] ioctl(5, LOOP_CLR_FD [pid 1679] <... futex resumed>) = 0 [pid 1686] <... set_robust_list resumed>) = 0 [pid 1685] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1684] <... futex resumed>) = 0 [pid 1683] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1682] <... write resumed>) = 1048576 [pid 1680] <... ioctl resumed>) = 0 [pid 1679] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1686] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1685] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1682] munmap(0x7f6f98bca000, 1048576 [pid 1680] close(5 [pid 1679] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1684] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1683] <... futex resumed>) = 0 [pid 1686] <... prctl resumed>) = 0 [pid 1685] <... mprotect resumed>) = 0 [pid 1682] <... munmap resumed>) = 0 [pid 1680] <... close resumed>) = 0 [pid 1686] setpgid(0, 0 [pid 1682] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1680] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1679] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1685] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1686] <... setpgid resumed>) = 0 [pid 1684] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1683] sendfile(5, 6, NULL, 140737974943952 [pid 1682] <... openat resumed>) = 7 [pid 1680] <... futex resumed>) = 0 [pid 1679] <... futex resumed>) = 0 [pid 1686] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1684] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1682] ioctl(7, LOOP_SET_FD, 3 [pid 1680] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1679] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 30.326558][ T1680] EXT4-fs (loop5): VFS: Can't find ext4 filesystem [pid 1678] exit_group(0./strace-static-x86_64: Process 1687 attached [pid 1686] <... openat resumed>) = 3 [pid 1685] <... clone resumed>, parent_tid=[1687], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1687 [pid 1684] <... mprotect resumed>) = 0 [pid 1683] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1687] set_robust_list(0x7f6fa100b9e0, 24 [pid 1685] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1684] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1683] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1687] <... set_robust_list resumed>) = 0 [pid 1685] <... futex resumed>) = 0 [pid 1683] <... futex resumed>) = 1 [pid 1679] <... futex resumed>) = 0 [pid 1687] memfd_create("syzkaller", 0 [pid 1685] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1684] <... clone resumed>, parent_tid=[1688], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1688 [pid 1683] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1687] <... memfd_create resumed>) = 3 [pid 1685] <... futex resumed>) = 0 [pid 1684] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1687] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1685] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1684] <... futex resumed>) = 0 [pid 1687] <... mmap resumed>) = 0x7f6f98bca000 [pid 1685] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1684] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1688 attached [pid 1686] write(3, "1000", 4 [pid 1685] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1684] <... futex resumed>) = 0 [pid 1682] <... ioctl resumed>) = 0 [pid 1681] <... futex resumed>) = ? [pid 1680] <... futex resumed>) = ? [pid 1678] <... exit_group resumed>) = ? [pid 1688] set_robust_list(0x7f6fa100b9e0, 24 [pid 1686] <... write resumed>) = 4 [pid 1685] <... mprotect resumed>) = 0 [pid 1684] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1682] close(3 [pid 1681] +++ exited with 0 +++ [pid 1680] +++ exited with 0 +++ [pid 1688] <... set_robust_list resumed>) = 0 [pid 1686] close(3 [pid 1685] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1684] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1688] memfd_create("syzkaller", 0 [pid 1686] <... close resumed>) = 0 [pid 1682] <... close resumed>) = 0 [pid 1688] <... memfd_create resumed>) = 3 [pid 1686] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1688] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1686] <... futex resumed>) = 0 [pid 1682] mkdir("./bus", 0777 [pid 1688] <... mmap resumed>) = 0x7f6f98bca000 [pid 1686] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0./strace-static-x86_64: Process 1689 attached [pid 1687] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1686] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1684] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1682] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1689] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1688] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1686] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1685] <... clone resumed>, parent_tid=[1689], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1689 [pid 1689] <... set_robust_list resumed>) = 0 [pid 1688] <... write resumed>) = 1048576 [pid 1687] <... write resumed>) = 1048576 [pid 1686] <... mprotect resumed>) = 0 [pid 1684] <... mprotect resumed>) = 0 [pid 1682] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1689] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1688] munmap(0x7f6f98bca000, 1048576 [pid 1687] munmap(0x7f6f98bca000, 1048576 [pid 1686] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1684] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1689] <... open resumed>) = 4 [pid 1688] <... munmap resumed>) = 0 [pid 1688] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1686] <... clone resumed>, parent_tid=[1690], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1690 [pid 1688] <... openat resumed>) = 4 [pid 1686] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1688] ioctl(4, LOOP_SET_FD, 3 [pid 1686] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1691 attached ./strace-static-x86_64: Process 1690 attached [pid 1689] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1687] <... munmap resumed>) = 0 [pid 1686] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1685] <... futex resumed>) = 0 [pid 1691] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1690] set_robust_list(0x7f6fa100b9e0, 24 [pid 1689] <... futex resumed>) = 0 [pid 1687] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1684] <... clone resumed>, parent_tid=[1691], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1691 [pid 1691] <... set_robust_list resumed>) = 0 [pid 1690] <... set_robust_list resumed>) = 0 [pid 1689] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1685] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1684] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1691] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1690] memfd_create("syzkaller", 0 [pid 1685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1684] <... futex resumed>) = 0 [pid 1691] <... open resumed>) = 5 [pid 1690] <... memfd_create resumed>) = 3 [pid 1689] <... futex resumed>) = 0 [pid 1685] <... futex resumed>) = 1 [pid 1684] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1691] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1690] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1689] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1686] <... futex resumed>) = 0 [pid 1685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1684] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1688] <... ioctl resumed>) = 0 [pid 1686] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1688] close(3 [pid 1686] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1689] <... mount resumed>) = 0 [pid 1688] <... close resumed>) = 0 [pid 1686] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1684] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1688] mkdir("./bus", 0777 [pid 1686] <... mprotect resumed>) = 0 [pid 1688] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1686] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1688] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1686] <... clone resumed>, parent_tid=[1693], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1693 ./strace-static-x86_64: Process 1693 attached [pid 1691] <... futex resumed>) = 0 [pid 1690] <... mmap resumed>) = 0x7f6f98bca000 [pid 1689] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1686] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1684] <... futex resumed>) = 0 [pid 1693] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1691] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1686] <... futex resumed>) = 0 [pid 1686] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1693] <... set_robust_list resumed>) = 0 [pid 1691] <... mount resumed>) = 0 [pid 1690] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1689] <... futex resumed>) = 1 [pid 1685] <... futex resumed>) = 0 [pid 1684] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1691] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1689] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1691] <... futex resumed>) = 1 [pid 1689] <... open resumed>) = 6 [pid 1685] <... futex resumed>) = 0 [pid 1684] <... futex resumed>) = 0 [pid 1691] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1689] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1684] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1691] <... open resumed>) = 3 [pid 1689] <... futex resumed>) = 0 [pid 1685] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1684] <... futex resumed>) = 0 [pid 1691] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1689] openat(-1, "/proc/self/exe", O_RDONLY [pid 1685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1684] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1691] <... futex resumed>) = 0 [pid 1689] <... openat resumed>) = 7 [pid 1685] <... futex resumed>) = 0 [pid 1684] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1691] openat(-1, "/proc/self/exe", O_RDONLY [pid 1689] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1684] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1691] <... openat resumed>) = 6 [pid 1689] <... futex resumed>) = 0 [pid 1685] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1684] <... futex resumed>) = 0 [pid 1691] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1689] sendfile(6, 7, NULL, 140737974943952 [pid 1685] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1684] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1691] <... futex resumed>) = 0 [pid 1685] <... futex resumed>) = 0 [pid 1684] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1691] sendfile(3, 6, NULL, 140737974943952 [pid 1685] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1684] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1676] +++ exited with 0 +++ [pid 1675] +++ exited with 0 +++ [pid 1684] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1675, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1689] <... sendfile resumed>) = 1048576 [pid 1689] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [ 30.372880][ T1682] loop4: detected capacity change from 0 to 2048 [ 30.389798][ T1688] loop3: detected capacity change from 0 to 2048 [ 30.399147][ T1682] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 30.411130][ T1688] EXT4-fs warning (device loop3): read_mmp_block:107: Error -117 while reading MMP block 64 [pid 1693] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1691] <... sendfile resumed>) = 1048576 [pid 1690] <... write resumed>) = 1048576 [pid 1689] <... futex resumed>) = 1 [pid 1687] <... openat resumed>) = 5 [pid 1685] <... futex resumed>) = 0 [pid 1678] +++ exited with 0 +++ [pid 408] <... openat resumed>) = 3 [pid 1687] ioctl(5, LOOP_SET_FD, 3 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1678, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] ioctl(3, LOOP_CLR_FD [pid 1693] <... open resumed>) = 4 [pid 1693] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1686] <... futex resumed>) = 0 [pid 1686] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1686] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1693] <... futex resumed>) = 1 [pid 1693] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1693] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1686] <... futex resumed>) = 0 [pid 1686] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1686] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1693] <... futex resumed>) = 1 [pid 1693] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1693] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1686] <... futex resumed>) = 0 [pid 1686] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1686] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1693] <... futex resumed>) = 1 [pid 1693] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1693] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1686] <... futex resumed>) = 0 [pid 1686] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1686] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1693] <... futex resumed>) = 1 [pid 1690] munmap(0x7f6f98bca000, 1048576 [pid 1693] sendfile(5, 6, NULL, 140737974943952 [pid 1690] <... munmap resumed>) = 0 [pid 1693] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1693] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1686] <... futex resumed>) = 0 [pid 1693] <... futex resumed>) = 1 [pid 1693] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1690] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 7 [pid 1690] ioctl(7, LOOP_SET_FD, 3 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 408] close(3 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 408] <... close resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 412] ioctl(3, LOOP_CLR_FD [pid 1690] <... ioctl resumed>) = 0 [pid 1690] close(3) = 0 [pid 412] <... ioctl resumed>) = 0 [pid 1690] mkdir("./bus", 0777 [pid 412] close(3 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1696 [pid 1690] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1690] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1697 ./strace-static-x86_64: Process 1696 attached [pid 1696] set_robust_list(0x5555564066e0, 24) = 0 [pid 1696] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1696] setpgid(0, 0) = 0 [pid 1696] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1696] write(3, "1000", 4) = 4 [pid 1696] close(3) = 0 [pid 1696] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1696] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1696] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1696] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1698], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1698 [pid 1696] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1696] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1696] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1696] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1696] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1699], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1699 [pid 1696] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1696] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1698 attached [pid 1698] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1698] memfd_create("syzkaller", 0) = 3 [pid 1698] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1691] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1689] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1691] <... futex resumed>) = 1 [pid 1684] <... futex resumed>) = 0 [pid 1691] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1688] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1688] ioctl(4, LOOP_CLR_FD) = 0 [pid 1688] close(4) = 0 [pid 1688] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1688] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1687] <... ioctl resumed>) = 0 [pid 1687] close(3) = 0 [pid 1687] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1687] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1697 attached [pid 1697] set_robust_list(0x5555564066e0, 24) = 0 [pid 1697] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1684] exit_group(0) = ? [pid 1697] <... prctl resumed>) = 0 [pid 1691] <... futex resumed>) = ? [pid 1697] setpgid(0, 0 [pid 1691] +++ exited with 0 +++ [pid 1697] <... setpgid resumed>) = 0 [pid 1697] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1697] write(3, "1000", 4) = 4 [pid 1697] close(3) = 0 [pid 1697] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1697] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1697] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1697] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1701], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1701 [pid 1697] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1697] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1697] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1697] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1697] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1702], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1702 [pid 1697] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1697] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1701 attached [pid 1701] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1701] memfd_create("syzkaller", 0) = 3 [pid 1701] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1688] <... futex resumed>) = ? [pid 1688] +++ exited with 0 +++ [pid 1684] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1684, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 410] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = 0 [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1703 [pid 1701] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1703 attached [pid 1703] set_robust_list(0x5555564066e0, 24) = 0 [pid 1703] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1703] setpgid(0, 0) = 0 [pid 1703] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1703] write(3, "1000", 4) = 4 [pid 1703] close(3) = 0 [pid 1703] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1703] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1703] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1703] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1704], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1704 [pid 1703] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1703] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1703] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1703] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1703] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1705], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1705 [pid 1703] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1703] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1701] <... write resumed>) = 1048576 [pid 1701] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1701] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [pid 1701] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1698] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1701] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 1699 attached [pid 1699] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1699] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1699] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1696] <... futex resumed>) = 0 [pid 1696] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1696] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1701] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1701] close(4) = 0 [pid 1701] close(3 [pid 1682] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1682] ioctl(7, LOOP_CLR_FD) = 0 [pid 1701] <... close resumed>) = 0 [pid 1701] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1701] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1699] <... futex resumed>) = 1 [pid 1699] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1682] close(7 [pid 1699] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1696] <... futex resumed>) = 0 [pid 1696] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 30.431325][ T1687] loop2: detected capacity change from 0 to 2048 [ 30.433987][ T1690] loop0: detected capacity change from 0 to 2048 [pid 1696] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1699] <... futex resumed>) = 1 ./strace-static-x86_64: Process 1705 attached ./strace-static-x86_64: Process 1704 attached ./strace-static-x86_64: Process 1702 attached [pid 1698] <... write resumed>) = 1048576 [pid 1682] <... close resumed>) = 0 [pid 1705] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1704] set_robust_list(0x7f6fa100b9e0, 24 [pid 1702] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1699] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1705] <... set_robust_list resumed>) = 0 [pid 1704] <... set_robust_list resumed>) = 0 [pid 1702] <... set_robust_list resumed>) = 0 [pid 1699] <... open resumed>) = 5 [pid 1705] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1704] memfd_create("syzkaller", 0 [pid 1702] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1699] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1705] <... open resumed>) = 3 [pid 1704] <... memfd_create resumed>) = 4 [pid 1702] <... open resumed>) = 3 [pid 1699] <... futex resumed>) = 1 [pid 1696] <... futex resumed>) = 0 [pid 1705] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1704] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1702] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1699] openat(-1, "/proc/self/exe", O_RDONLY [pid 1696] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1705] <... futex resumed>) = 1 [pid 1704] <... mmap resumed>) = 0x7f6f98bca000 [pid 1703] <... futex resumed>) = 0 [pid 1702] <... futex resumed>) = 1 [pid 1699] <... openat resumed>) = 6 [pid 1697] <... futex resumed>) = 0 [pid 1696] <... futex resumed>) = 0 [pid 1705] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1704] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1703] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1702] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1699] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1697] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1696] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1705] <... mount resumed>) = 0 [pid 1703] <... futex resumed>) = 0 [pid 1701] <... futex resumed>) = 0 [pid 1699] <... futex resumed>) = 0 [pid 1697] <... futex resumed>) = 1 [pid 1696] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1705] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1703] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1701] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1699] sendfile(5, 6, NULL, 140737974943952 [pid 1697] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1696] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1705] <... futex resumed>) = 0 [pid 1703] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1701] <... mount resumed>) = 0 [pid 1699] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1696] <... futex resumed>) = 0 [pid 1705] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1703] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1701] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1699] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1698] munmap(0x7f6f98bca000, 1048576 [pid 1696] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1682] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1705] <... open resumed>) = 5 [pid 1703] <... futex resumed>) = 0 [pid 1701] <... futex resumed>) = 1 [pid 1699] <... futex resumed>) = 0 [pid 1698] <... munmap resumed>) = 0 [pid 1697] <... futex resumed>) = 0 [pid 1696] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1682] <... futex resumed>) = 0 [pid 1679] exit_group(0 [pid 1705] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1703] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1701] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1699] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1698] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1697] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1683] <... futex resumed>) = ? [pid 1679] <... exit_group resumed>) = ? [pid 1705] <... futex resumed>) = 0 [pid 1703] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1701] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1698] <... openat resumed>) = 7 [pid 1697] <... futex resumed>) = 0 [pid 1683] +++ exited with 0 +++ [pid 1682] +++ exited with 0 +++ [pid 1679] +++ exited with 0 +++ [ 30.490486][ T1687] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 30.505276][ T1690] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1705] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1703] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1701] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1698] ioctl(7, LOOP_SET_FD, 3 [pid 1697] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1705] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1703] <... futex resumed>) = 0 [pid 1701] <... open resumed>) = 4 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1679, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1705] openat(-1, "/proc/self/exe", O_RDONLY [pid 1703] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1701] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1705] <... openat resumed>) = 6 [pid 1701] <... futex resumed>) = 1 [pid 1697] <... futex resumed>) = 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 1705] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1701] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1697] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1705] <... futex resumed>) = 1 [pid 1703] <... futex resumed>) = 0 [pid 1701] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1697] <... futex resumed>) = 0 [pid 1705] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1703] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1705] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1703] <... futex resumed>) = 0 [pid 1701] openat(-1, "/proc/self/exe", O_RDONLY [pid 1697] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... openat resumed>) = 3 [pid 1704] <... write resumed>) = 1048576 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3 [pid 1704] munmap(0x7f6f98bca000, 1048576 [pid 411] <... close resumed>) = 0 [pid 1704] <... munmap resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1704] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1705] sendfile(5, 6, NULL, 140737974943952 [pid 1704] <... openat resumed>) = 7 [pid 1703] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1701] <... openat resumed>) = 5 [pid 1698] <... ioctl resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1709 ./strace-static-x86_64: Process 1709 attached [pid 1704] ioctl(7, LOOP_SET_FD, 4 [pid 1701] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1698] close(3 [pid 1687] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1704] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1698] <... close resumed>) = 0 [pid 1704] ioctl(7, LOOP_CLR_FD [pid 1698] mkdir("./bus", 0777 [pid 1704] <... ioctl resumed>) = 0 [pid 1701] <... futex resumed>) = 1 [pid 1698] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1697] <... futex resumed>) = 0 [pid 1690] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1701] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1698] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1690] ioctl(7, LOOP_CLR_FD) = 0 [pid 1690] close(7) = 0 [pid 1704] ioctl(7, LOOP_SET_FD, 4 [pid 1701] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1697] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1690] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1704] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1690] <... futex resumed>) = 0 [pid 1704] close(7 [pid 1690] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1704] <... close resumed>) = 0 [pid 1704] close(4) = 0 [pid 1704] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1704] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1701] sendfile(4, 5, NULL, 140737974943952 [pid 1697] <... futex resumed>) = 0 [pid 1697] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1686] exit_group(0 [pid 1693] <... futex resumed>) = ? [pid 1690] <... futex resumed>) = ? [pid 1687] ioctl(5, LOOP_CLR_FD [pid 1686] <... exit_group resumed>) = ? [pid 1693] +++ exited with 0 +++ [pid 1690] +++ exited with 0 +++ [pid 1709] set_robust_list(0x5555564066e0, 24 [pid 1705] <... sendfile resumed>) = 1048576 [pid 1701] <... sendfile resumed>) = 1048576 [pid 1686] +++ exited with 0 +++ [pid 1709] <... set_robust_list resumed>) = 0 [pid 1705] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1701] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1686, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1701] <... futex resumed>) = 1 [pid 1697] <... futex resumed>) = 0 [pid 1705] <... futex resumed>) = 1 [pid 1703] <... futex resumed>) = 0 [pid 1701] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1697] exit_group(0 [pid 1705] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1703] exit_group(0 [pid 1702] <... futex resumed>) = ? [pid 1701] <... futex resumed>) = ? [pid 1697] <... exit_group resumed>) = ? [pid 1709] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1705] <... futex resumed>) = ? [pid 1704] <... futex resumed>) = ? [pid 1703] <... exit_group resumed>) = ? [pid 1702] +++ exited with 0 +++ [pid 1701] +++ exited with 0 +++ [pid 1697] +++ exited with 0 +++ [pid 1709] <... prctl resumed>) = 0 [pid 1705] +++ exited with 0 +++ [pid 1704] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1697, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1709] setpgid(0, 0) = 0 [ 30.535801][ T1698] loop1: detected capacity change from 0 to 2048 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1709] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 407] <... openat resumed>) = 3 [pid 1709] <... openat resumed>) = 3 [pid 1709] write(3, "1000", 4) = 4 [pid 1709] close(3) = 0 [pid 1709] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1709] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1709] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1709] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1713], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1713 [pid 1709] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1709] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1709] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1709] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1709] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1714], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1714 [pid 1709] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1709] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1714 attached [pid 1714] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1714] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1713 attached [pid 1713] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1713] memfd_create("syzkaller", 0) = 4 [pid 1713] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1713] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1713] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1713] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 5 [pid 1713] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1713] ioctl(5, LOOP_CLR_FD) = 0 [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] close(3) = 0 [pid 1713] ioctl(5, LOOP_SET_FD, 4 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1713] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1713] close(5) = 0 [pid 1713] close(4 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1715 ./strace-static-x86_64: Process 1715 attached [pid 1698] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1698] ioctl(7, LOOP_CLR_FD) = 0 [pid 1698] close(7) = 0 [pid 1698] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1715] set_robust_list(0x5555564066e0, 24 [pid 1698] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1696] exit_group(0 [pid 1699] <... futex resumed>) = ? [pid 1696] <... exit_group resumed>) = ? [pid 1699] +++ exited with 0 +++ [pid 1698] <... futex resumed>) = ? [pid 1715] <... set_robust_list resumed>) = 0 [pid 1713] <... close resumed>) = 0 [pid 1713] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1713] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1715] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1715] setpgid(0, 0) = 0 [pid 1715] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1715] write(3, "1000", 4) = 4 [pid 1715] close(3) = 0 [pid 1715] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1715] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1715] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1715] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1716], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1716 [pid 1715] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1716 attached ) = 0 [pid 1687] <... ioctl resumed>) = 0 [pid 1716] set_robust_list(0x7f6fa100b9e0, 24 [pid 1687] close(5 [pid 1715] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1687] <... close resumed>) = 0 [pid 1716] <... set_robust_list resumed>) = 0 [pid 1715] <... futex resumed>) = 0 [pid 1687] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1687] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1716] memfd_create("syzkaller", 0 [pid 1715] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1716] <... memfd_create resumed>) = 3 [pid 1714] <... open resumed>) = 3 [pid 412] <... openat resumed>) = 3 [pid 1714] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1685] exit_group(0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1716] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1715] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1714] <... futex resumed>) = 1 [pid 1709] <... futex resumed>) = 0 [pid 1689] <... futex resumed>) = ? [pid 1687] <... futex resumed>) = ? [pid 1685] <... exit_group resumed>) = ? [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1714] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1709] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1689] +++ exited with 0 +++ [pid 1687] +++ exited with 0 +++ [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1713] <... futex resumed>) = 0 [pid 1709] <... futex resumed>) = 1 [pid 1713] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1709] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1717 ./strace-static-x86_64: Process 1717 attached [pid 1713] <... mount resumed>) = 0 [pid 1713] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1709] <... futex resumed>) = 0 [pid 1713] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1709] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1717] set_robust_list(0x5555564066e0, 24 [pid 1716] <... mmap resumed>) = 0x7f6f98bca000 [pid 1715] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1713] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1715] <... mprotect resumed>) = 0 [pid 1713] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1709] <... futex resumed>) = 0 [pid 1698] +++ exited with 0 +++ [pid 1696] +++ exited with 0 +++ [pid 1713] <... open resumed>) = 4 [pid 1709] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1696, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1713] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1709] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1713] <... futex resumed>) = 0 [pid 1713] openat(-1, "/proc/self/exe", O_RDONLY [pid 1709] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1713] <... openat resumed>) = 5 [pid 1709] <... futex resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1713] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1709] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1713] <... futex resumed>) = 0 [pid 1709] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1713] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1709] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1713] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1709] <... futex resumed>) = 0 [pid 1713] sendfile(4, 5, NULL, 140737974943952 [pid 1709] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1717] <... set_robust_list resumed>) = 0 [pid 1717] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1717] setpgid(0, 0) = 0 [pid 1717] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1717] write(3, "1000", 4) = 4 [pid 1717] close(3) = 0 [pid 1717] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1717] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1717] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1717] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1718], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1718 [pid 1717] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1717] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1717] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1717] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1717] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1719], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1719 [pid 1717] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1717] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1719 attached [pid 1719] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1719] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1717] <... futex resumed>) = 0 [pid 1717] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1717] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1719] <... futex resumed>) = 1 [pid 1719] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1713] <... sendfile resumed>) = 1048576 [pid 1719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1713] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1717] <... futex resumed>) = 0 [pid 1717] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1717] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1719] <... futex resumed>) = 1 [pid 1719] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1717] <... futex resumed>) = 0 [pid 1717] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1717] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1719] <... futex resumed>) = 1 [pid 1719] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1717] <... futex resumed>) = 0 [pid 1717] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1717] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1719] <... futex resumed>) = 1 [pid 1719] sendfile(4, 5, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 1719] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1717] <... futex resumed>) = 0 [pid 1719] <... futex resumed>) = 1 [pid 1719] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1718 attached [pid 1718] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1718] memfd_create("syzkaller", 0) = 6 [pid 1718] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1718] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1713] <... futex resumed>) = 1 [pid 1709] <... futex resumed>) = 0 [pid 1713] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1709] exit_group(0 [pid 1714] <... futex resumed>) = ? [pid 1713] <... futex resumed>) = ? [pid 1709] <... exit_group resumed>) = ? [pid 1714] +++ exited with 0 +++ [pid 1718] <... write resumed>) = 1048576 [pid 1718] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1718] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1713] +++ exited with 0 +++ [pid 1709] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1709, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1718] <... openat resumed>) = 7 [ 30.580938][ T1698] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1718] ioctl(7, LOOP_SET_FD, 6 [pid 1716] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1715] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 411] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 1720 attached [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1721 [pid 1716] <... write resumed>) = 1048576 [pid 1716] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1716] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 1716] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 1721 attached [pid 1720] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1718] <... ioctl resumed>) = 0 [pid 1715] <... clone resumed>, parent_tid=[1720], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1720 [pid 1715] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1715] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1718] close(6) = 0 [pid 1718] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1718] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1720] <... set_robust_list resumed>) = 0 [pid 1703] +++ exited with 0 +++ [pid 1685] +++ exited with 0 +++ [pid 1720] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1720] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1715] <... futex resumed>) = 0 [pid 1715] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1715] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1720] <... futex resumed>) = 1 [pid 1720] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 408] <... openat resumed>) = 3 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1703, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1685, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 408] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 408] close(3 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 408] <... close resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 409] <... openat resumed>) = 3 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] ioctl(3, LOOP_CLR_FD [pid 409] ioctl(3, LOOP_CLR_FD [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] close(3 [pid 409] close(3 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1722 [pid 410] <... close resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1720] <... mount resumed>) = 0 [pid 1720] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1715] <... futex resumed>) = 0 [pid 1715] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1715] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1720] <... futex resumed>) = 1 [pid 1720] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1724 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1723 [pid 1720] <... open resumed>) = 6 [pid 1720] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1715] <... futex resumed>) = 0 [pid 1715] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1715] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1720] <... futex resumed>) = 1 [pid 1720] openat(-1, "/proc/self/exe", O_RDONLY) = 7 [pid 1720] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1715] <... futex resumed>) = 0 [pid 1715] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1715] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1720] <... futex resumed>) = 1 [pid 1720] sendfile(6, 7, NULL, 140737974943952 [pid 1721] set_robust_list(0x5555564066e0, 24) = 0 [pid 1721] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1721] setpgid(0, 0) = 0 [pid 1721] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1721] write(3, "1000", 4) = 4 [pid 1721] close(3) = 0 [pid 1721] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1716] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1724 attached ./strace-static-x86_64: Process 1723 attached ./strace-static-x86_64: Process 1722 attached [pid 1716] close(3) = 0 [pid 1723] set_robust_list(0x5555564066e0, 24 [pid 1716] mkdir("./bus", 0777 [pid 1724] set_robust_list(0x5555564066e0, 24 [pid 1723] <... set_robust_list resumed>) = 0 [pid 1724] <... set_robust_list resumed>) = 0 [pid 1722] set_robust_list(0x5555564066e0, 24 [pid 1716] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1724] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1723] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1722] <... set_robust_list resumed>) = 0 [pid 1716] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1724] <... prctl resumed>) = 0 [pid 1723] <... prctl resumed>) = 0 [pid 1721] <... futex resumed>) = 0 [pid 1721] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1721] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1721] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1726], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1726 [pid 1721] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1721] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1721] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1721] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1721] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1727], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1727 [pid 1721] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1721] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1727 attached [pid 1727] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1727] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1727] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1721] <... futex resumed>) = 0 [pid 1721] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1721] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1727] <... futex resumed>) = 1 [pid 1727] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1724] setpgid(0, 0 [pid 1723] setpgid(0, 0 [pid 1724] <... setpgid resumed>) = 0 [pid 1723] <... setpgid resumed>) = 0 [pid 1722] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1724] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1723] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1722] <... prctl resumed>) = 0 [pid 1724] <... openat resumed>) = 3 [pid 1723] <... openat resumed>) = 3 [pid 1724] write(3, "1000", 4 [pid 1723] write(3, "1000", 4 [pid 1722] setpgid(0, 0 [pid 1724] <... write resumed>) = 4 [pid 1723] <... write resumed>) = 4 [pid 1722] <... setpgid resumed>) = 0 [pid 1724] close(3 [pid 1723] close(3 [pid 1722] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1724] <... close resumed>) = 0 [pid 1723] <... close resumed>) = 0 [pid 1724] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1722] <... openat resumed>) = 3 [pid 1724] <... futex resumed>) = 0 [pid 1723] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1722] write(3, "1000", 4 [pid 1720] <... sendfile resumed>) = 1048576 [pid 1727] <... mount resumed>) = 0 [pid 1724] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1723] <... futex resumed>) = 0 [pid 1722] <... write resumed>) = 4 [pid 1720] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1727] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1724] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1723] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1722] close(3 [pid 1720] <... futex resumed>) = 1 [pid 1715] <... futex resumed>) = 0 [pid 1727] <... futex resumed>) = 1 [pid 1724] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1723] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1722] <... close resumed>) = 0 [pid 1721] <... futex resumed>) = 0 [pid 1720] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1727] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1724] <... mprotect resumed>) = 0 [pid 1723] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1722] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1721] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1727] <... open resumed>) = 4 [pid 1724] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [ 30.648405][ T1718] loop5: detected capacity change from 0 to 2048 [ 30.654672][ T1716] loop0: detected capacity change from 0 to 2048 [ 30.677409][ T1716] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 1723] <... mprotect resumed>) = 0 [pid 1722] <... futex resumed>) = 0 [pid 1721] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1729 attached ./strace-static-x86_64: Process 1726 attached [pid 1727] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1723] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1722] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1721] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1716] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1727] <... futex resumed>) = 0 [pid 1724] <... clone resumed>, parent_tid=[1729], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1729 [pid 1722] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1721] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1716] ioctl(4, LOOP_CLR_FD [pid 1729] set_robust_list(0x7f6fa100b9e0, 24 [pid 1727] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1726] set_robust_list(0x7f6fa100b9e0, 24 [pid 1724] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1723] <... clone resumed>, parent_tid=[1730], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1730 [pid 1722] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1721] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1716] <... ioctl resumed>) = 0 [pid 1729] <... set_robust_list resumed>) = 0 [pid 1727] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1726] <... set_robust_list resumed>) = 0 [pid 1724] <... futex resumed>) = 0 [pid 1723] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1722] <... mprotect resumed>) = 0 [pid 1721] <... futex resumed>) = 0 [pid 1716] close(4 [pid 1727] openat(-1, "/proc/self/exe", O_RDONLY [pid 1726] memfd_create("syzkaller", 0 [pid 1724] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1721] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1722] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1729] memfd_create("syzkaller", 0 [pid 1727] <... openat resumed>) = 5 [pid 1726] <... memfd_create resumed>) = 6 [pid 1724] <... futex resumed>) = 0 [pid 1723] <... futex resumed>) = 0 [pid 1716] <... close resumed>) = 0 [pid 1729] <... memfd_create resumed>) = 3 [pid 1727] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1726] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1724] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1723] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1716] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1715] exit_group(0 [pid 1729] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1727] <... futex resumed>) = 1 [pid 1726] <... mmap resumed>) = 0x7f6f98bca000 [pid 1724] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1723] <... futex resumed>) = 0 [pid 1722] <... clone resumed>, parent_tid=[1731], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1731 [pid 1721] <... futex resumed>) = 0 [pid 1720] <... futex resumed>) = ? [pid 1716] <... futex resumed>) = ? [pid 1715] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1730 attached [pid 1727] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1721] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1720] +++ exited with 0 +++ [pid 1730] set_robust_list(0x7f6fa100b9e0, 24 [pid 1727] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1721] <... futex resumed>) = 0 [pid 1730] <... set_robust_list resumed>) = 0 [pid 1727] sendfile(4, 5, NULL, 140737974943952 [pid 1721] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1730] memfd_create("syzkaller", 0) = 3 [pid 1730] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 1726] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1724] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1723] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1729] <... mmap resumed>) = 0x7f6f98bca000 [pid 1724] <... mprotect resumed>) = 0 [pid 1723] <... mmap resumed>) = 0x7f6f98bca000 [pid 1722] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1716] +++ exited with 0 +++ [pid 1715] +++ exited with 0 +++ [pid 1724] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1723] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1715, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1724] <... clone resumed>, parent_tid=[1732], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1732 [pid 1723] <... mprotect resumed>) = 0 [pid 1722] <... futex resumed>) = 0 [pid 407] <... restart_syscall resumed>) = 0 [pid 1724] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1723] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1722] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1724] <... futex resumed>) = 0 [pid 1722] <... futex resumed>) = 0 [pid 1724] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1723] <... clone resumed>, parent_tid=[1733], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1733 [pid 1722] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1723] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1722] <... mmap resumed>) = 0x7f6fa0fca000 [pid 407] <... openat resumed>) = 3 [pid 1723] <... futex resumed>) = 0 [pid 1722] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 407] ioctl(3, LOOP_CLR_FD [pid 1723] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1722] <... mprotect resumed>) = 0 [pid 407] <... ioctl resumed>) = 0 [pid 1722] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 407] close(3) = 0 [pid 1722] <... clone resumed>, parent_tid=[1734], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1734 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1730] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1727] <... sendfile resumed>) = 1048576 [pid 1722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1727] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1722] <... futex resumed>) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1735 [pid 1727] <... futex resumed>) = 1 [pid 1722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1721] <... futex resumed>) = 0 [pid 1727] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1729] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1730] <... write resumed>) = 1048576 [pid 1730] munmap(0x7f6f98beb000, 1048576) = 0 [pid 1730] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [ 30.691569][ T1718] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1730] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 1735 attached ./strace-static-x86_64: Process 1734 attached ./strace-static-x86_64: Process 1733 attached ./strace-static-x86_64: Process 1732 attached ./strace-static-x86_64: Process 1731 attached ) = 0 [pid 1729] <... write resumed>) = 1048576 [pid 1726] <... write resumed>) = 1048576 [pid 1730] close(3) = 0 [pid 1730] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1730] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1735] set_robust_list(0x5555564066e0, 24 [pid 1734] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1733] set_robust_list(0x7f6f98bea9e0, 24 [pid 1732] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1731] set_robust_list(0x7f6fa100b9e0, 24 [pid 1729] munmap(0x7f6f98bca000, 1048576 [pid 1726] munmap(0x7f6f98bca000, 1048576 [pid 1735] <... set_robust_list resumed>) = 0 [pid 1734] <... set_robust_list resumed>) = 0 [pid 1733] <... set_robust_list resumed>) = 0 [pid 1732] <... set_robust_list resumed>) = 0 [pid 1731] <... set_robust_list resumed>) = 0 [pid 1729] <... munmap resumed>) = 0 [pid 1726] <... munmap resumed>) = 0 [pid 1718] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1735] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1734] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1733] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1732] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1731] memfd_create("syzkaller", 0 [pid 1729] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1726] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1718] ioctl(7, LOOP_CLR_FD [pid 1735] <... prctl resumed>) = 0 [pid 1734] <... open resumed>) = 3 [pid 1733] <... open resumed>) = 3 [pid 1732] <... open resumed>) = 4 [pid 1731] <... memfd_create resumed>) = 4 [pid 1729] <... openat resumed>) = 5 [pid 1726] <... openat resumed>) = 7 [pid 1735] setpgid(0, 0 [pid 1734] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1733] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1732] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1731] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1729] ioctl(5, LOOP_SET_FD, 3 [pid 1726] ioctl(7, LOOP_SET_FD, 6 [pid 1718] <... ioctl resumed>) = 0 [pid 1735] <... setpgid resumed>) = 0 [pid 1734] <... futex resumed>) = 1 [pid 1733] <... futex resumed>) = 1 [pid 1732] <... futex resumed>) = 1 [pid 1731] <... mmap resumed>) = 0x7f6f98bca000 [pid 1726] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1724] <... futex resumed>) = 0 [pid 1723] <... futex resumed>) = 0 [pid 1722] <... futex resumed>) = 0 [pid 1718] close(7 [pid 1733] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1732] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1724] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1723] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1718] <... close resumed>) = 0 [pid 1735] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1733] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1732] <... mount resumed>) = 0 [pid 1724] <... futex resumed>) = 0 [pid 1723] <... futex resumed>) = 0 [pid 1722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1718] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1733] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1732] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1724] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1723] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1718] <... futex resumed>) = 0 [pid 1733] <... mount resumed>) = 0 [pid 1732] <... futex resumed>) = 0 [pid 1724] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1718] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1733] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1732] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1724] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1733] <... futex resumed>) = 1 [pid 1732] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1724] <... futex resumed>) = 0 [pid 1723] <... futex resumed>) = 0 [pid 1733] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1732] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1724] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1723] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1731] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1722] <... futex resumed>) = 0 [pid 1735] <... openat resumed>) = 3 [pid 1734] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1733] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1732] <... open resumed>) = 6 [pid 1726] ioctl(7, LOOP_CLR_FD [pid 1723] <... futex resumed>) = 0 [pid 1717] exit_group(0 [pid 1735] write(3, "1000", 4 [pid 1734] <... mount resumed>) = 0 [pid 1733] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1732] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1726] <... ioctl resumed>) = 0 [pid 1723] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1719] <... futex resumed>) = ? [pid 1718] <... futex resumed>) = ? [pid 1717] <... exit_group resumed>) = ? [pid 1735] <... write resumed>) = 4 [pid 1734] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1733] <... open resumed>) = 5 [pid 1732] <... futex resumed>) = 1 [pid 1724] <... futex resumed>) = 0 [pid 1722] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1719] +++ exited with 0 +++ [pid 1733] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1732] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1724] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1735] close(3 [pid 1734] <... futex resumed>) = 0 [pid 1733] <... futex resumed>) = 1 [pid 1732] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1724] <... futex resumed>) = 0 [pid 1723] <... futex resumed>) = 0 [pid 1722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1735] <... close resumed>) = 0 [pid 1734] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1733] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1732] openat(-1, "/proc/self/exe", O_RDONLY [pid 1724] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1723] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1722] <... futex resumed>) = 0 [pid 1735] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1734] <... open resumed>) = 5 [pid 1733] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1732] <... openat resumed>) = 7 [pid 1723] <... futex resumed>) = 0 [pid 1722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1735] <... futex resumed>) = 0 [pid 1734] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1733] openat(-1, "/proc/self/exe", O_RDONLY [pid 1732] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1726] ioctl(7, LOOP_SET_FD, 6 [pid 1723] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1722] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1734] <... futex resumed>) = 0 [pid 1733] <... openat resumed>) = 6 [pid 1732] <... futex resumed>) = 1 [pid 1726] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1724] <... futex resumed>) = 0 [pid 1722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1735] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1734] openat(-1, "/proc/self/exe", O_RDONLY [pid 1733] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1732] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1730] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1726] close(7 [pid 1724] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1722] <... futex resumed>) = 0 [pid 1735] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1734] <... openat resumed>) = 6 [pid 1733] <... futex resumed>) = 1 [pid 1732] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1730] ioctl(4, LOOP_CLR_FD [pid 1726] <... close resumed>) = 0 [pid 1724] <... futex resumed>) = 0 [pid 1723] <... futex resumed>) = 0 [pid 1735] <... mprotect resumed>) = 0 [pid 1734] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1733] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1732] sendfile(6, 7, NULL, 140737974943952 [pid 1730] <... ioctl resumed>) = 0 [pid 1726] close(6 [pid 1724] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1723] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1735] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1734] <... futex resumed>) = 0 [pid 1733] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1731] <... write resumed>) = 1048576 [pid 1730] close(4 [pid 1729] <... ioctl resumed>) = 0 [pid 1726] <... close resumed>) = 0 [pid 1723] <... futex resumed>) = 0 [pid 1722] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1734] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1733] sendfile(5, 6, NULL, 140737974943952 [pid 1731] munmap(0x7f6f98bca000, 1048576 [pid 1730] <... close resumed>) = 0 [pid 1729] close(3 [pid 1726] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1723] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1722] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1735] <... clone resumed>, parent_tid=[1738], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1738 [pid 1734] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1733] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1731] <... munmap resumed>) = 0 [pid 1730] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1729] <... close resumed>) = 0 [pid 1726] <... futex resumed>) = 0 [pid 1722] <... futex resumed>) = 0 [pid 1735] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1734] sendfile(5, 6, NULL, 140737974943952 [pid 1733] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1731] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1730] <... futex resumed>) = 0 [pid 1729] mkdir("./bus", 0777 [pid 1726] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1722] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1732] <... sendfile resumed>) = 1048576 ./strace-static-x86_64: Process 1738 attached [pid 1735] <... futex resumed>) = 0 [pid 1734] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1733] <... futex resumed>) = 1 [pid 1732] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1731] <... openat resumed>) = 7 [pid 1730] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1729] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1723] <... futex resumed>) = 0 [pid 1721] exit_group(0 [pid 1735] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1734] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1731] ioctl(7, LOOP_SET_FD, 4 [pid 1729] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1727] <... futex resumed>) = ? [pid 1726] <... futex resumed>) = ? [pid 1721] <... exit_group resumed>) = ? [pid 1738] set_robust_list(0x7f6fa100b9e0, 24 [pid 1735] <... futex resumed>) = 0 [pid 1734] <... futex resumed>) = 1 [pid 1733] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1732] <... futex resumed>) = 1 [pid 1727] +++ exited with 0 +++ [pid 1726] +++ exited with 0 +++ [pid 1724] <... futex resumed>) = 0 [pid 1723] exit_group(0 [pid 1722] <... futex resumed>) = 0 [pid 1738] <... set_robust_list resumed>) = 0 [pid 1735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1734] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1733] <... futex resumed>) = ? [ 30.732231][ T1730] loop2: detected capacity change from 0 to 2048 [ 30.748092][ T1730] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 30.761625][ T1729] loop3: detected capacity change from 0 to 2048 [pid 1732] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1730] <... futex resumed>) = ? [pid 1723] <... exit_group resumed>) = ? [pid 1738] memfd_create("syzkaller", 0 [pid 1733] +++ exited with 0 +++ [pid 1738] <... memfd_create resumed>) = 3 [pid 1738] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 1738] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1735] <... mmap resumed>) = 0x7f6f98bca000 [pid 1718] +++ exited with 0 +++ [pid 1717] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1717, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1735] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1735] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1735] <... clone resumed>, parent_tid=[1739], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1739 [pid 412] <... openat resumed>) = 3 [pid 1735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1740 ./strace-static-x86_64: Process 1739 attached [pid 1730] +++ exited with 0 +++ [pid 1723] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1723, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1741 [pid 1738] <... write resumed>) = 1048576 [pid 1738] munmap(0x7f6f98beb000, 1048576 [pid 1739] set_robust_list(0x7f6f98bea9e0, 24 [pid 1731] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1741 attached ./strace-static-x86_64: Process 1740 attached [pid 1739] <... set_robust_list resumed>) = 0 [pid 1738] <... munmap resumed>) = 0 [pid 1738] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1731] close(4) = 0 [pid 1731] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1731] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1739] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1741] set_robust_list(0x5555564066e0, 24 [pid 1740] set_robust_list(0x5555564066e0, 24 [pid 1741] <... set_robust_list resumed>) = 0 [pid 1739] <... open resumed>) = 5 [pid 1740] <... set_robust_list resumed>) = 0 [pid 1741] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1740] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1739] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1741] <... prctl resumed>) = 0 [pid 1740] <... prctl resumed>) = 0 [pid 1739] <... futex resumed>) = 1 [pid 1735] <... futex resumed>) = 0 [pid 1740] setpgid(0, 0 [pid 1739] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1741] setpgid(0, 0 [pid 1740] <... setpgid resumed>) = 0 [pid 1739] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1735] <... futex resumed>) = 0 [pid 1741] <... setpgid resumed>) = 0 [pid 1741] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1740] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1739] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1741] <... openat resumed>) = 3 [pid 1740] <... openat resumed>) = 3 [pid 1739] <... mount resumed>) = 0 [pid 1741] write(3, "1000", 4 [pid 1740] write(3, "1000", 4 [pid 1739] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1741] <... write resumed>) = 4 [pid 1740] <... write resumed>) = 4 [pid 1739] <... futex resumed>) = 1 [pid 1735] <... futex resumed>) = 0 [pid 1729] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1741] close(3) = 0 [pid 1741] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1741] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1741] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1741] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1744], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1744 [pid 1741] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1740] close(3 [pid 1739] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1738] <... openat resumed>) = 4 [pid 1735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1721] +++ exited with 0 +++ [pid 1741] <... futex resumed>) = 0 [pid 1738] ioctl(4, LOOP_SET_FD, 3 [pid 1741] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1740] <... close resumed>) = 0 [pid 1739] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1735] <... futex resumed>) = 0 [pid 1729] ioctl(5, LOOP_CLR_FD [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1721, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- ./strace-static-x86_64: Process 1744 attached [pid 1741] <... futex resumed>) = 0 [pid 1740] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1739] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1738] <... ioctl resumed>) = 0 [pid 1735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1744] set_robust_list(0x7f6fa100b9e0, 24 [pid 1740] <... futex resumed>) = 0 [pid 1739] <... open resumed>) = 6 [pid 1738] close(3 [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1741] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1744] <... set_robust_list resumed>) = 0 [pid 1740] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1739] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1738] <... close resumed>) = 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 1741] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1744] memfd_create("syzkaller", 0 [pid 1740] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1739] <... futex resumed>) = 1 [pid 1738] mkdir("./bus", 0777 [pid 1735] <... futex resumed>) = 0 [pid 1741] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1744] <... memfd_create resumed>) = 3 [pid 1741] <... mprotect resumed>) = 0 [pid 1740] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1739] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1738] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1744] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1741] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1740] <... mprotect resumed>) = 0 [pid 1739] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1738] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1735] <... futex resumed>) = 0 [pid 1744] <... mmap resumed>) = 0x7f6f98bca000 [pid 1740] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1739] openat(-1, "/proc/self/exe", O_RDONLY [pid 1735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1744] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1739] <... openat resumed>) = 3 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1744] <... write resumed>) = 1048576 [pid 1741] <... clone resumed>, parent_tid=[1747], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1747 [pid 1740] <... clone resumed>, parent_tid=[1748], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1748 [pid 1739] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1744] munmap(0x7f6f98bca000, 1048576 [pid 1741] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1740] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1739] <... futex resumed>) = 1 [ 30.793131][ T1731] loop1: detected capacity change from 0 to 2048 [ 30.818035][ T1729] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 30.834675][ T1738] loop0: detected capacity change from 0 to 2048 [pid 1735] <... futex resumed>) = 0 [pid 411] <... openat resumed>) = 3 ./strace-static-x86_64: Process 1748 attached ./strace-static-x86_64: Process 1747 attached [pid 1744] <... munmap resumed>) = 0 [pid 1741] <... futex resumed>) = 0 [pid 1740] <... futex resumed>) = 0 [pid 1739] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1735] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1748] set_robust_list(0x7f6fa100b9e0, 24 [pid 1747] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1741] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... ioctl resumed>) = 0 [pid 1748] <... set_robust_list resumed>) = 0 [pid 1747] <... set_robust_list resumed>) = 0 [pid 411] close(3 [pid 1748] memfd_create("syzkaller", 0 [pid 1747] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 411] <... close resumed>) = 0 [pid 1748] <... memfd_create resumed>) = 3 [pid 1747] <... open resumed>) = 4 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1748] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1747] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1748] <... mmap resumed>) = 0x7f6f98beb000 [pid 1747] <... futex resumed>) = 1 [pid 1741] <... futex resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1749 [pid 1748] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1747] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1741] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1747] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1741] <... futex resumed>) = 0 [pid 1747] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1741] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1747] <... mount resumed>) = 0 [pid 1747] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1741] <... futex resumed>) = 0 [pid 1747] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1741] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1747] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1741] <... futex resumed>) = 0 [pid 1747] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1741] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1747] <... open resumed>) = 5 ./strace-static-x86_64: Process 1749 attached [pid 1748] <... write resumed>) = 1048576 [pid 1747] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1744] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1740] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1739] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1735] <... futex resumed>) = 0 [pid 1749] set_robust_list(0x5555564066e0, 24 [pid 1748] munmap(0x7f6f98beb000, 1048576 [pid 1747] <... futex resumed>) = 1 [pid 1744] <... openat resumed>) = 6 [pid 1741] <... futex resumed>) = 0 [pid 1740] <... futex resumed>) = 0 [pid 1739] sendfile(6, 3, NULL, 140737974943952 [pid 1735] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1731] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1747] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1741] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1731] ioctl(7, LOOP_CLR_FD [pid 1747] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1741] <... futex resumed>) = 0 [pid 1731] <... ioctl resumed>) = 0 [pid 1747] openat(-1, "/proc/self/exe", O_RDONLY [pid 1741] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1731] close(7 [pid 1747] <... openat resumed>) = 7 [pid 1744] ioctl(6, LOOP_SET_FD, 3 [pid 1731] <... close resumed>) = 0 [pid 1747] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1731] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1747] <... futex resumed>) = 1 [pid 1741] <... futex resumed>) = 0 [pid 1731] <... futex resumed>) = 0 [pid 1747] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1741] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1731] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1747] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1741] <... futex resumed>) = 0 [pid 1747] sendfile(5, 7, NULL, 140737974943952 [pid 1741] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1749] <... set_robust_list resumed>) = 0 [pid 1748] <... munmap resumed>) = 0 [pid 1747] <... sendfile resumed>) = 1048576 [pid 1744] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1740] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1747] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1741] <... futex resumed>) = 0 [pid 1747] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1749] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1748] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1744] ioctl(6, LOOP_CLR_FD [pid 1740] <... mmap resumed>) = 0x7f6f98cca000 [pid 1739] <... sendfile resumed>) = 1048576 [pid 1722] exit_group(0 [pid 1749] <... prctl resumed>) = 0 [pid 1748] <... openat resumed>) = 4 [pid 1744] <... ioctl resumed>) = 0 [pid 1740] mprotect(0x7f6f98ccb000, 131072, PROT_READ|PROT_WRITE [pid 1739] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1734] <... futex resumed>) = ? [pid 1722] <... exit_group resumed>) = ? [pid 1749] setpgid(0, 0 [ 30.858586][ T1731] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 30.891377][ T1750] EXT4-fs warning (device loop0): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 30.894421][ T1738] EXT4-fs (loop0): get root inode failed [pid 1748] ioctl(4, LOOP_SET_FD, 3 [pid 1740] <... mprotect resumed>) = 0 [pid 1739] <... futex resumed>) = 1 [pid 1735] <... futex resumed>) = 0 [pid 1734] +++ exited with 0 +++ [pid 1731] <... futex resumed>) = ? [pid 1729] <... ioctl resumed>) = 0 [pid 1749] <... setpgid resumed>) = 0 [pid 1740] clone(child_stack=0x7f6f98cea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1739] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1749] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1744] ioctl(6, LOOP_SET_FD, 3 [pid 1749] <... openat resumed>) = 3 [pid 1744] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1740] <... clone resumed>, parent_tid=[1752], tls=0x7f6f98cea700, child_tidptr=0x7f6f98cea9d0) = 1752 ./strace-static-x86_64: Process 1752 attached [pid 1749] write(3, "1000", 4 [pid 1744] close(6 [pid 1731] +++ exited with 0 +++ [pid 1729] close(5 [pid 1722] +++ exited with 0 +++ [pid 1752] set_robust_list(0x7f6f98cea9e0, 24 [pid 1729] <... close resumed>) = 0 [pid 1752] <... set_robust_list resumed>) = 0 [pid 1729] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1752] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1729] <... futex resumed>) = 0 [pid 1729] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1748] <... ioctl resumed>) = 0 [pid 1748] close(3) = 0 [pid 1748] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1748] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1740] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1752] <... futex resumed>) = 0 [pid 1740] <... futex resumed>) = 1 [pid 1752] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1740] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1749] <... write resumed>) = 4 [pid 1744] <... close resumed>) = 0 [pid 1724] exit_group(0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1722, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1749] close(3 [pid 1744] close(3 [pid 1732] <... futex resumed>) = ? [pid 1729] <... futex resumed>) = ? [pid 1724] <... exit_group resumed>) = ? [pid 1752] <... open resumed>) = 3 [pid 1749] <... close resumed>) = 0 [pid 1744] <... close resumed>) = 0 [pid 1738] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1732] +++ exited with 0 +++ [pid 1729] +++ exited with 0 +++ [pid 1738] ioctl(4, LOOP_CLR_FD) = 0 [pid 1738] close(4) = 0 [pid 1738] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1738] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1724] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1724, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1749] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1744] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1735] exit_group(0 [pid 1749] <... futex resumed>) = 0 [pid 1741] exit_group(0 [pid 1739] <... futex resumed>) = ? [pid 1749] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1738] <... futex resumed>) = ? [pid 1735] <... exit_group resumed>) = ? [pid 1741] <... exit_group resumed>) = ? [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1752] <... futex resumed>) = 1 [pid 1749] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1747] <... futex resumed>) = ? [pid 1744] <... futex resumed>) = ? [pid 1740] <... futex resumed>) = 0 [pid 1739] +++ exited with 0 +++ [pid 1738] +++ exited with 0 +++ [pid 1735] +++ exited with 0 +++ [pid 408] <... openat resumed>) = 3 [pid 1747] +++ exited with 0 +++ [pid 1740] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1740] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1749] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 408] ioctl(3, LOOP_CLR_FD [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1735, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 1749] <... mprotect resumed>) = 0 [pid 1749] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 410] <... openat resumed>) = 3 [pid 407] <... openat resumed>) = 3 [pid 1749] <... clone resumed>, parent_tid=[1755], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1755 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1744] +++ exited with 0 +++ [pid 1741] +++ exited with 0 +++ [pid 407] ioctl(3, LOOP_CLR_FD [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1741, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1749] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1752] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1749] <... futex resumed>) = 0 [pid 410] close(3 [pid 409] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 1755 attached [pid 1749] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... close resumed>) = 0 [pid 1749] <... futex resumed>) = 0 [pid 409] <... restart_syscall resumed>) = 0 [pid 1748] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1749] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1748] ioctl(4, LOOP_CLR_FD [pid 1752] <... mount resumed>) = 0 [pid 1752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1740] <... futex resumed>) = 0 [pid 1749] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1740] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1740] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1752] <... futex resumed>) = 1 [pid 1752] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1749] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1749] <... mprotect resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1756 [pid 409] <... openat resumed>) = 3 [pid 1749] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 409] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 1756 attached ) = 0 [pid 1756] set_robust_list(0x5555564066e0, 24) = 0 [pid 1756] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1756] setpgid(0, 0) = 0 [pid 1756] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1756] write(3, "1000", 4) = 4 [pid 1756] close(3) = 0 [pid 1756] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1756] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1756] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1756] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1758], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1758 [pid 1756] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1756] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1756] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1756] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1756] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1759], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1759 [pid 1756] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1756] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1757 attached [pid 1749] <... clone resumed>, parent_tid=[1757], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1757 [pid 409] close(3 [pid 1749] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 409] <... close resumed>) = 0 [pid 1757] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1757] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1749] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1759 attached [pid 1759] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1760 [pid 1759] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1760 attached [pid 1760] set_robust_list(0x5555564066e0, 24) = 0 ./strace-static-x86_64: Process 1758 attached [pid 1760] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1755] set_robust_list(0x7f6fa100b9e0, 24 [pid 1760] <... prctl resumed>) = 0 [pid 1760] setpgid(0, 0) = 0 [pid 1760] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1760] write(3, "1000", 4) = 4 [pid 1760] close(3) = 0 [pid 1760] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1760] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1760] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1760] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1755] <... set_robust_list resumed>) = 0 [pid 1760] <... clone resumed>, parent_tid=[1761], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1761 [pid 1760] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1760] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1760] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1760] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1760] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1762], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1762 [pid 1760] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1760] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1761 attached [pid 1761] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1761] memfd_create("syzkaller", 0) = 3 [pid 1761] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1755] memfd_create("syzkaller", 0 [pid 1758] set_robust_list(0x7f6fa100b9e0, 24./strace-static-x86_64: Process 1762 attached [pid 1755] <... memfd_create resumed>) = 4 [pid 1758] <... set_robust_list resumed>) = 0 [pid 1762] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1755] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1761] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1755] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1758] memfd_create("syzkaller", 0) = 4 [pid 1758] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1761] <... write resumed>) = 1048576 [pid 1761] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1761] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 1761] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1761] ioctl(4, LOOP_CLR_FD) = 0 [pid 1762] <... set_robust_list resumed>) = 0 [pid 1762] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1758] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1755] <... write resumed>) = 1048576 [pid 1755] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1755] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1761] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1761] close(4) = 0 [pid 1761] close(3) = 0 [pid 1761] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1761] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1752] <... open resumed>) = 5 [pid 1748] <... ioctl resumed>) = 0 [pid 408] <... ioctl resumed>) = 0 [pid 1759] <... open resumed>) = 3 [pid 1757] <... open resumed>) = 3 [pid 1752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1759] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1757] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1752] <... futex resumed>) = 1 [pid 1740] <... futex resumed>) = 0 [pid 1759] <... futex resumed>) = 1 [pid 1757] <... futex resumed>) = 1 [pid 1756] <... futex resumed>) = 0 [pid 1752] openat(-1, "/proc/self/exe", O_RDONLY [pid 1740] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1759] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1757] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1756] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1752] <... openat resumed>) = 6 [pid 1740] <... futex resumed>) = 0 [pid 1759] <... mount resumed>) = 0 [pid 1756] <... futex resumed>) = 0 [pid 1752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1740] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1759] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1756] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1752] <... futex resumed>) = 0 [pid 1740] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1759] <... futex resumed>) = 0 [pid 1756] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1752] sendfile(5, 6, NULL, 140737974943952 [pid 1740] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1759] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1756] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1752] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1740] <... futex resumed>) = 0 [pid 1759] <... open resumed>) = 5 [pid 1756] <... futex resumed>) = 0 [pid 1752] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1740] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1759] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1756] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1752] <... futex resumed>) = 0 [pid 1740] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... ioctl resumed>) = 0 [pid 1759] <... futex resumed>) = 0 [pid 1756] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1752] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1759] openat(-1, "/proc/self/exe", O_RDONLY [pid 1756] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1759] <... openat resumed>) = 6 [pid 1756] <... futex resumed>) = 0 [pid 1759] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1756] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1759] <... futex resumed>) = 0 [pid 1756] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1759] sendfile(5, 6, NULL, 140737974943952 [pid 1756] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1759] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1756] <... futex resumed>) = 0 [pid 1759] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1756] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1759] <... futex resumed>) = 0 [pid 1756] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1759] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1748] close(4) = 0 [pid 1748] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1748] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1762] <... open resumed>) = 5 [pid 1740] exit_group(0 [pid 1752] <... futex resumed>) = ? [pid 1748] <... futex resumed>) = ? [pid 1740] <... exit_group resumed>) = ? [pid 1752] +++ exited with 0 +++ [pid 1748] +++ exited with 0 +++ [pid 1740] +++ exited with 0 +++ [pid 1749] <... futex resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1740, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1749] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1762] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1760] <... futex resumed>) = 0 [pid 1760] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1760] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1762] <... futex resumed>) = 1 [pid 1762] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1761] <... futex resumed>) = 0 [pid 1761] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1749] <... futex resumed>) = 1 [pid 1761] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1760] <... futex resumed>) = 0 [pid 1760] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1749] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1760] <... futex resumed>) = 0 [pid 1757] <... futex resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 408] close(3 [pid 407] close(3 [pid 1760] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1757] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 412] <... openat resumed>) = 3 [pid 408] <... close resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1761] <... futex resumed>) = 1 [pid 1757] <... mount resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1757] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1757] <... futex resumed>) = 1 [pid 1749] <... futex resumed>) = 0 [pid 412] close(3 [pid 1757] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1749] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1761] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1749] <... futex resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 1749] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1758] <... write resumed>) = 1048576 [pid 1758] munmap(0x7f6f98bca000, 1048576 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1763 [pid 1758] <... munmap resumed>) = 0 [pid 1758] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 7 [ 30.911606][ T1748] loop5: detected capacity change from 0 to 2048 [ 30.912076][ T1738] EXT4-fs (loop0): mount failed [ 30.940979][ T1748] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1758] ioctl(7, LOOP_SET_FD, 4./strace-static-x86_64: Process 1765 attached ./strace-static-x86_64: Process 1764 attached ./strace-static-x86_64: Process 1763 attached [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1764 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1765 [pid 1765] set_robust_list(0x5555564066e0, 24) = 0 [pid 1765] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1765] setpgid(0, 0) = 0 [pid 1765] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1764] set_robust_list(0x5555564066e0, 24 [pid 1765] <... openat resumed>) = 3 [pid 1761] <... open resumed>) = 3 [pid 1757] <... open resumed>) = 6 [pid 1755] <... openat resumed>) = 5 [pid 1758] <... ioctl resumed>) = 0 [pid 1763] set_robust_list(0x5555564066e0, 24 [pid 1764] <... set_robust_list resumed>) = 0 [pid 1765] write(3, "1000", 4 [pid 1761] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1760] <... futex resumed>) = 0 [pid 1757] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1755] ioctl(5, LOOP_SET_FD, 4 [pid 1764] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1765] <... write resumed>) = 4 [pid 1760] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1758] close(4) = 0 [pid 1758] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1758] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1763] <... set_robust_list resumed>) = 0 [pid 1763] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1763] setpgid(0, 0) = 0 [pid 1763] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1763] write(3, "1000", 4) = 4 [pid 1763] close(3) = 0 [pid 1763] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1763] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1763] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1763] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1766], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1766 [pid 1763] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1763] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1763] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1763] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1763] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1767], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1767 [pid 1763] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1763] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1767 attached [pid 1767] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1767] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1766 attached [pid 1766] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1766] memfd_create("syzkaller", 0) = 4 [pid 1766] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1761] openat(-1, "/proc/self/exe", O_RDONLY [pid 1760] <... futex resumed>) = 0 [pid 1757] <... futex resumed>) = 1 [pid 1749] <... futex resumed>) = 0 [pid 1761] <... openat resumed>) = 4 [pid 1760] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1757] openat(-1, "/proc/self/exe", O_RDONLY [pid 1749] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1761] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1760] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1761] <... futex resumed>) = 0 [pid 1760] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1757] <... openat resumed>) = 7 [pid 1749] <... futex resumed>) = 0 [pid 1761] sendfile(3, 4, NULL, 140737974943952 [pid 1760] <... futex resumed>) = 0 [pid 1757] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1749] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1766] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1749] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1749] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1749] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1766] <... write resumed>) = 1048576 [pid 1766] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1766] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 1766] ioctl(5, LOOP_SET_FD, 4) = 0 [pid 1766] close(4) = 0 [pid 1766] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1766] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1764] <... prctl resumed>) = 0 [pid 1764] setpgid(0, 0) = 0 [pid 1764] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1764] write(3, "1000", 4) = 4 [pid 1764] close(3) = 0 [pid 1764] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1764] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1764] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1764] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1768], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1768 [pid 1764] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1764] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1764] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1764] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1764] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1769], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1769 [pid 1764] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1764] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1769 attached [pid 1769] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1769] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1768 attached [pid 1768] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1768] memfd_create("syzkaller", 0) = 4 [pid 1768] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1768] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1765] close(3 [pid 1761] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1760] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1757] <... futex resumed>) = 1 [pid 1755] <... ioctl resumed>) = 0 [pid 1749] <... futex resumed>) = 0 [pid 1765] <... close resumed>) = 0 [pid 1761] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1760] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1757] sendfile(6, 7, NULL, 140737974943952 [pid 1755] close(4 [pid 1765] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1761] <... futex resumed>) = 0 [pid 1760] exit_group(0 [pid 1769] <... open resumed>) = 3 [pid 1767] <... open resumed>) = 3 [pid 1765] <... futex resumed>) = 0 [pid 1762] <... futex resumed>) = ? [pid 1760] <... exit_group resumed>) = ? [pid 1755] <... close resumed>) = 0 [pid 1749] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=26000000} [pid 1762] +++ exited with 0 +++ [pid 1761] +++ exited with 0 +++ [pid 1769] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1767] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1769] <... futex resumed>) = 1 [pid 1767] <... futex resumed>) = 1 [pid 1764] <... futex resumed>) = 0 [pid 1763] <... futex resumed>) = 0 [pid 1760] +++ exited with 0 +++ [pid 1769] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1767] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1764] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1763] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1755] mkdir("./bus", 0777 [pid 1765] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1769] <... mount resumed>) = 0 [pid 1767] <... mount resumed>) = 0 [pid 1765] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1764] <... futex resumed>) = 0 [pid 1763] <... futex resumed>) = 0 [pid 1755] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1760, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1765] <... mprotect resumed>) = 0 [pid 1769] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1767] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1765] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1764] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1763] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1755] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 1765] <... clone resumed>, parent_tid=[1771], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1771 [pid 1769] <... futex resumed>) = 0 [pid 1767] <... futex resumed>) = 0 [pid 1765] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1764] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 409] <... restart_syscall resumed>) = 0 [pid 1768] <... write resumed>) = 1048576 [pid 1765] <... futex resumed>) = 0 [ 30.985614][ T1758] loop3: detected capacity change from 0 to 2048 [ 30.993050][ T1755] loop4: detected capacity change from 0 to 2048 [ 31.000249][ T120] blk_update_request: I/O error, dev loop4, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 31.010352][ T1766] loop5: detected capacity change from 0 to 2048 [ 31.011448][ T120] blk_update_request: I/O error, dev loop4, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [pid 1764] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1763] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1769] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1767] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1765] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1764] <... futex resumed>) = 0 [pid 1763] <... futex resumed>) = 0 [pid 1769] <... open resumed>) = 5 [pid 1767] <... open resumed>) = 4 [pid 1764] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1763] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1769] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1767] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1764] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1769] <... futex resumed>) = 0 [pid 1767] <... futex resumed>) = 0 [pid 1764] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1763] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1769] openat(-1, "/proc/self/exe", O_RDONLY [pid 1767] openat(-1, "/proc/self/exe", O_RDONLY [pid 1764] <... futex resumed>) = 0 [pid 1763] <... futex resumed>) = 0 [pid 1769] <... openat resumed>) = 6 [pid 1767] <... openat resumed>) = 6 [pid 1764] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1763] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1769] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1767] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1764] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 1771 attached [pid 1769] <... futex resumed>) = 0 [pid 1767] <... futex resumed>) = 0 [pid 1755] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1755] ioctl(5, LOOP_CLR_FD) = 0 [pid 1755] close(5) = 0 [pid 1755] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1755] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1771] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1771] memfd_create("syzkaller", 0) = 3 [pid 1771] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 1764] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1763] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... openat resumed>) = 3 [pid 1767] sendfile(4, 6, NULL, 140737974943952 [pid 1764] <... futex resumed>) = 0 [pid 1763] <... futex resumed>) = 0 [pid 1763] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1764] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 1767] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1767] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1763] <... futex resumed>) = 0 [pid 1767] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1774 [pid 1769] sendfile(5, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 1757] <... sendfile resumed>) = 1048576 [pid 1769] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1771] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1757] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1749] <... futex resumed>) = 0 [pid 1769] <... futex resumed>) = 1 [pid 1757] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1749] exit_group(0 [pid 1764] <... futex resumed>) = 0 [pid 1755] <... futex resumed>) = ? [pid 1749] <... exit_group resumed>) = ? [pid 1757] <... futex resumed>) = ? [pid 1769] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1755] +++ exited with 0 +++ ./strace-static-x86_64: Process 1774 attached [pid 1774] set_robust_list(0x5555564066e0, 24 [pid 1757] +++ exited with 0 +++ [pid 1749] +++ exited with 0 +++ [pid 1774] <... set_robust_list resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1749, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1774] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 1765] <... futex resumed>) = 0 [pid 1765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1774] setpgid(0, 0) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1765] <... mmap resumed>) = 0x7f6f98bca000 [pid 1774] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1765] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1765] <... mprotect resumed>) = 0 [pid 1774] <... openat resumed>) = 3 [pid 1765] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 411] <... ioctl resumed>) = 0 [pid 411] close(3 [pid 1774] write(3, "1000", 4 [pid 411] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1774] <... write resumed>) = 4 [pid 1774] close(3) = 0 [pid 1774] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1776 [pid 1774] <... futex resumed>) = 0 [pid 1774] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1765] <... clone resumed>, parent_tid=[1775], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1775 [pid 1774] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1774] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1774] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1777], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1777 [pid 1774] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1774] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1774] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1774] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1774] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1778], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1778 [pid 1774] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1774] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1765] <... futex resumed>) = 0 [pid 1765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1768] munmap(0x7f6f98bca000, 1048576 [pid 1771] <... write resumed>) = 1048576 [pid 1771] munmap(0x7f6f98beb000, 1048576) = 0 [pid 1771] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 31.033806][ T1755] EXT4-fs (loop4): VFS: Can't find ext4 filesystem [pid 1771] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 1776 attached ./strace-static-x86_64: Process 1775 attached [pid 1768] <... munmap resumed>) = 0 [pid 1771] <... ioctl resumed>) = 0 [pid 1771] close(3) = 0 [pid 1771] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1771] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1777 attached [pid 1777] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1777] memfd_create("syzkaller", 0) = 3 [pid 1777] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1777] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1777] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1777] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 1777] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 1778 attached [pid 1776] set_robust_list(0x5555564066e0, 24 [pid 1775] set_robust_list(0x7f6f98bea9e0, 24 [pid 1768] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1777] <... ioctl resumed>) = 0 [pid 1777] close(3) = 0 [pid 1777] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1777] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1778] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1778] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1778] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1774] <... futex resumed>) = 0 [pid 1774] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1774] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1778] <... futex resumed>) = 1 [pid 1778] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1778] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1774] <... futex resumed>) = 0 [pid 1774] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1774] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1778] <... futex resumed>) = 1 [pid 1778] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1776] <... set_robust_list resumed>) = 0 [pid 1776] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1776] setpgid(0, 0) = 0 [pid 1776] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1776] write(3, "1000", 4) = 4 [pid 1776] close(3) = 0 [pid 1776] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1776] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1776] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1776] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1780], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1780 [pid 1776] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1776] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1776] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1776] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1776] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1781], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1781 [pid 1776] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1776] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1781 attached [pid 1781] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1781] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1780 attached [pid 1780] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1780] memfd_create("syzkaller", 0) = 4 [pid 1780] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1778] <... open resumed>) = 5 [pid 1775] <... set_robust_list resumed>) = 0 [pid 1768] <... openat resumed>) = 7 [pid 1758] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1775] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1768] ioctl(7, LOOP_SET_FD, 4 [pid 1758] ioctl(7, LOOP_CLR_FD [pid 1778] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1775] <... open resumed>) = 3 [pid 1778] <... futex resumed>) = 1 [pid 1774] <... futex resumed>) = 0 [pid 1758] <... ioctl resumed>) = 0 [pid 1775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1778] openat(-1, "/proc/self/exe", O_RDONLY [pid 1774] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1778] <... openat resumed>) = 6 [pid 1774] <... futex resumed>) = 0 [pid 1778] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1774] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1778] <... futex resumed>) = 0 [pid 1774] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1778] sendfile(5, 6, NULL, 140737974943952 [pid 1774] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1774] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1781] <... open resumed>) = 3 [pid 1781] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1776] <... futex resumed>) = 0 [pid 1776] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1776] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1781] <... futex resumed>) = 1 [pid 1781] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1781] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1776] <... futex resumed>) = 0 [pid 1776] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1776] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1781] <... futex resumed>) = 1 [pid 1781] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1781] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1776] <... futex resumed>) = 0 [pid 1776] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1776] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1781] <... futex resumed>) = 1 [pid 1781] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1781] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1776] <... futex resumed>) = 0 [pid 1776] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1776] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1781] <... futex resumed>) = 1 [pid 1781] sendfile(5, 6, NULL, 140737974943952 [pid 1758] close(7) = 0 [pid 1758] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1775] <... futex resumed>) = 1 [pid 1765] <... futex resumed>) = 0 [pid 1756] exit_group(0 [pid 1765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1759] <... futex resumed>) = ? [pid 1756] <... exit_group resumed>) = ? [pid 1765] <... futex resumed>) = 0 [pid 1775] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1759] +++ exited with 0 +++ [pid 1758] <... futex resumed>) = ? [pid 1765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1768] <... ioctl resumed>) = 0 [pid 1768] close(4) = 0 [pid 1775] <... mount resumed>) = 0 [pid 1775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1765] <... futex resumed>) = 0 [pid 1775] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1775] <... open resumed>) = 5 [pid 1768] mkdir("./bus", 0777 [pid 1765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1765] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1775] <... futex resumed>) = 0 [pid 1765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1775] openat(-1, "/proc/self/exe", O_RDONLY [pid 1765] <... futex resumed>) = 0 [pid 1765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1775] <... openat resumed>) = 6 [pid 1768] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1766] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1775] <... futex resumed>) = 1 [pid 1765] <... futex resumed>) = 0 [pid 1775] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1765] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1775] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1765] <... futex resumed>) = 0 [pid 1775] sendfile(5, 6, NULL, 140737974943952 [pid 1765] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1766] ioctl(5, LOOP_CLR_FD) = 0 [pid 1766] close(5) = 0 [pid 1766] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1766] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [ 31.056725][ T1771] loop0: detected capacity change from 0 to 2048 [ 31.058681][ T1758] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.071530][ T1777] loop2: detected capacity change from 0 to 2048 [ 31.078075][ T1766] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.091286][ T1768] loop1: detected capacity change from 0 to 2048 [pid 1768] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1780] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1780] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1780] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 7 [pid 1780] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1780] ioctl(7, LOOP_CLR_FD) = 0 [pid 1763] exit_group(0) = ? [pid 1767] <... futex resumed>) = -1 (errno 18446744073709551555) [pid 1766] <... futex resumed>) = ? [pid 1767] +++ exited with 0 +++ [pid 1780] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1780] close(7 [pid 1766] +++ exited with 0 +++ [pid 1763] +++ exited with 0 +++ [pid 1780] <... close resumed>) = 0 [pid 1780] close(4 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1763, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 412] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1783 [pid 1780] <... close resumed>) = 0 [pid 1780] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1780] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1778] <... sendfile resumed>) = 1048576 [pid 1778] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1778] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1774] <... futex resumed>) = 0 [pid 1775] <... sendfile resumed>) = 1048576 [pid 1775] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1765] <... futex resumed>) = 0 [pid 1775] <... futex resumed>) = 1 [pid 1775] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1781] <... sendfile resumed>) = 1048576 ./strace-static-x86_64: Process 1783 attached [pid 1781] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1783] set_robust_list(0x5555564066e0, 24 [pid 1781] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1776] <... futex resumed>) = 0 [pid 1776] exit_group(0 [pid 1780] <... futex resumed>) = ? [pid 1776] <... exit_group resumed>) = ? [pid 1780] +++ exited with 0 +++ [pid 1777] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1777] ioctl(4, LOOP_CLR_FD) = 0 [pid 1777] close(4) = 0 [pid 1777] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1777] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1783] <... set_robust_list resumed>) = 0 [ 31.107105][ T1777] EXT4-fs warning (device loop2): read_mmp_block:107: Error -117 while reading MMP block 64 [ 31.133354][ T1782] EXT4-fs warning (device loop0): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 31.144357][ T1771] EXT4-fs (loop0): get root inode failed [pid 1781] <... futex resumed>) = ? [pid 1781] +++ exited with 0 +++ [pid 1776] +++ exited with 0 +++ [pid 1774] exit_group(0 [pid 1777] <... futex resumed>) = ? [pid 1774] <... exit_group resumed>) = ? [pid 1777] +++ exited with 0 +++ [pid 1783] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1783] setpgid(0, 0) = 0 [pid 1783] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1783] write(3, "1000", 4) = 4 [pid 1783] close(3) = 0 [pid 1783] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1783] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1783] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1783] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1787], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1787 [pid 1783] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1783] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1783] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1783] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1776, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- ./strace-static-x86_64: Process 1787 attached [pid 1778] <... futex resumed>) = ? [pid 1783] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1788], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1788 [pid 1783] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1778] +++ exited with 0 +++ [pid 1774] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1774, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1787] set_robust_list(0x7f6fa100b9e0, 24 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1787] <... set_robust_list resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 1787] memfd_create("syzkaller", 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1787] <... memfd_create resumed>) = 3 [pid 411] <... ioctl resumed>) = 0 [pid 1787] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 411] close(3 [pid 1787] <... mmap resumed>) = 0x7f6f98bca000 [pid 411] <... close resumed>) = 0 [pid 1783] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1788 attached [pid 1788] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1788] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1788] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1783] <... futex resumed>) = 0 [pid 1783] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1783] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1788] <... futex resumed>) = 1 [pid 1788] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1788] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1783] <... futex resumed>) = 0 [pid 1783] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1783] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1788] <... futex resumed>) = 1 [pid 1788] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1787] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1771] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1771] ioctl(4, LOOP_CLR_FD [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1789 [pid 409] <... openat resumed>) = 3 [pid 1771] <... ioctl resumed>) = 0 [pid 1758] +++ exited with 0 +++ [pid 1756] +++ exited with 0 +++ [pid 409] ioctl(3, LOOP_CLR_FD [pid 1771] close(4 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1756, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 409] <... ioctl resumed>) = 0 [pid 1771] <... close resumed>) = 0 [pid 409] close(3 [pid 1771] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 409] <... close resumed>) = 0 [pid 1771] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 410] <... openat resumed>) = 3 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1790 [pid 1765] exit_group(0 [pid 410] <... close resumed>) = 0 [pid 1765] <... exit_group resumed>) = ? [pid 1775] <... futex resumed>) = -1 (errno 18446744073709551555) [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1775] +++ exited with 0 +++ [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1791 [pid 1771] <... futex resumed>) = ? [pid 1788] <... open resumed>) = 5 [pid 1788] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1783] <... futex resumed>) = 0 [pid 1783] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1783] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1788] <... futex resumed>) = 1 [pid 1788] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 1788] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1783] <... futex resumed>) = 0 [pid 1783] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1783] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1788] <... futex resumed>) = 1 [pid 1788] sendfile(5, 6, NULL, 140737974943952 [pid 1787] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1791 attached ./strace-static-x86_64: Process 1790 attached [pid 1787] munmap(0x7f6f98bca000, 1048576 [pid 1791] set_robust_list(0x5555564066e0, 24 [pid 1788] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1791] <... set_robust_list resumed>) = 0 [pid 1790] set_robust_list(0x5555564066e0, 24 [pid 1787] <... munmap resumed>) = 0 ./strace-static-x86_64: Process 1789 attached [pid 1791] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1787] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 1791] <... prctl resumed>) = 0 [pid 1787] ioctl(7, LOOP_SET_FD, 3 [pid 1790] <... set_robust_list resumed>) = 0 [pid 1789] set_robust_list(0x5555564066e0, 24 [pid 1788] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1783] <... futex resumed>) = 0 [pid 1788] <... futex resumed>) = 1 [pid 1788] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1791] setpgid(0, 0) = 0 [pid 1791] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1791] write(3, "1000", 4) = 4 [pid 1791] close(3) = 0 [pid 1791] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1791] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1791] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1791] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1792], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1792 [pid 1791] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1791] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1791] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1791] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1791] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1793], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1793 [pid 1791] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1791] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1793 attached [pid 1793] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1793] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1792 attached [pid 1792] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1792] memfd_create("syzkaller", 0) = 4 [pid 1792] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1768] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1768] ioctl(7, LOOP_CLR_FD) = 0 [pid 1768] close(7) = 0 [pid 1768] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1764] exit_group(0 [pid 1769] <... futex resumed>) = ? [pid 1764] <... exit_group resumed>) = ? [pid 1769] +++ exited with 0 +++ [pid 1790] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1789] <... set_robust_list resumed>) = 0 [pid 1790] <... prctl resumed>) = 0 [pid 1787] <... ioctl resumed>) = 0 [pid 1790] setpgid(0, 0 [pid 1789] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1790] <... setpgid resumed>) = 0 [pid 1789] <... prctl resumed>) = 0 [pid 1787] close(3 [pid 1790] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1789] setpgid(0, 0 [pid 1787] <... close resumed>) = 0 [pid 1793] <... open resumed>) = 3 [pid 1792] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1790] <... openat resumed>) = 3 [pid 1789] <... setpgid resumed>) = 0 [pid 1787] mkdir("./bus", 0777 [pid 1790] write(3, "1000", 4 [pid 1789] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1790] <... write resumed>) = 4 [pid 1789] <... openat resumed>) = 3 [pid 1790] close(3 [pid 1789] write(3, "1000", 4 [pid 1790] <... close resumed>) = 0 [pid 1789] <... write resumed>) = 4 [pid 1790] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1789] close(3 [pid 1790] <... futex resumed>) = 0 [pid 1789] <... close resumed>) = 0 [pid 1790] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1789] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1789] <... futex resumed>) = 0 [pid 1790] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1789] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1790] <... mprotect resumed>) = 0 [pid 1789] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1793] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1789] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1793] <... futex resumed>) = 1 [pid 1791] <... futex resumed>) = 0 [pid 1789] <... mprotect resumed>) = 0 [pid 1793] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1791] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] <... clone resumed>, parent_tid=[1794], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1794 [pid 1789] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1791] <... futex resumed>) = 0 [pid 1790] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1793] <... mount resumed>) = 0 [pid 1791] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1790] <... futex resumed>) = 0 [pid 1789] <... clone resumed>, parent_tid=[1795], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1795 [pid 1790] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1789] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1787] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1790] <... futex resumed>) = 0 [pid 1789] <... futex resumed>) = 0 [pid 1790] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1789] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1787] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1790] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1789] <... futex resumed>) = 0 [pid 1793] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1789] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1793] <... futex resumed>) = 1 [pid 1791] <... futex resumed>) = 0 [pid 1790] <... mprotect resumed>) = 0 [pid 1789] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1793] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1791] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1789] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1791] <... futex resumed>) = 0 [pid 1789] <... mprotect resumed>) = 0 [pid 1793] <... open resumed>) = 5 [pid 1791] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1790] <... clone resumed>, parent_tid=[1796], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1796 [pid 1789] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1796 attached ./strace-static-x86_64: Process 1794 attached [pid 1790] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1793] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] <... futex resumed>) = 0 [pid 1790] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1789] <... clone resumed>, parent_tid=[1797], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1797 [pid 1789] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1793] <... futex resumed>) = 1 [pid 1791] <... futex resumed>) = 0 [pid 1793] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1791] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1789] <... futex resumed>) = 0 [pid 1793] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1791] <... futex resumed>) = 0 [pid 1789] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1793] openat(-1, "/proc/self/exe", O_RDONLY [pid 1791] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1793] <... openat resumed>) = 6 [pid 1796] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1793] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1796] <... set_robust_list resumed>) = 0 [pid 1796] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1793] <... futex resumed>) = 1 [pid 1791] <... futex resumed>) = 0 [pid 1791] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1793] sendfile(5, 6, NULL, 140737974943952 [pid 1791] <... futex resumed>) = 0 [pid 1791] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1793] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1793] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1791] <... futex resumed>) = 0 [pid 1793] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1796] <... open resumed>) = 3 [pid 1796] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] <... futex resumed>) = 0 [pid 1790] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1790] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1796] <... futex resumed>) = 1 [pid 1796] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 1797 attached ./strace-static-x86_64: Process 1795 attached ) = 0 [pid 1794] set_robust_list(0x7f6fa100b9e0, 24 [pid 1792] <... write resumed>) = 1048576 [pid 1796] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] <... futex resumed>) = 0 [pid 1790] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1797] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1796] <... futex resumed>) = 1 [pid 1795] set_robust_list(0x7f6fa100b9e0, 24 [pid 1794] <... set_robust_list resumed>) = 0 [pid 1792] munmap(0x7f6f98bca000, 1048576 [pid 1790] <... futex resumed>) = 0 [pid 1790] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1797] <... set_robust_list resumed>) = 0 [pid 1797] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1796] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1795] <... set_robust_list resumed>) = 0 [pid 1792] <... munmap resumed>) = 0 [pid 1792] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 7 [pid 1792] ioctl(7, LOOP_SET_FD, 4 [pid 1795] memfd_create("syzkaller", 0 [pid 1794] memfd_create("syzkaller", 0 [pid 1795] <... memfd_create resumed>) = 4 [pid 1795] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [ 31.154687][ T1768] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.155508][ T1771] EXT4-fs (loop0): mount failed [ 31.187883][ T1787] loop5: detected capacity change from 0 to 2048 [pid 1796] <... open resumed>) = 4 [pid 1795] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1794] <... memfd_create resumed>) = 5 [pid 1792] <... ioctl resumed>) = 0 [pid 1771] +++ exited with 0 +++ [pid 1765] +++ exited with 0 +++ [pid 1794] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1792] close(4 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1765, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1794] <... mmap resumed>) = 0x7f6f98bca000 [pid 1792] <... close resumed>) = 0 [pid 1796] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1792] mkdir("./bus", 0777 [pid 1796] <... futex resumed>) = 1 [pid 1792] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1796] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1792] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 407] <... openat resumed>) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1794] write(5, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1800 [pid 1790] <... futex resumed>) = 0 [pid 1790] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1796] <... futex resumed>) = 0 [pid 1790] <... futex resumed>) = 1 [pid 1796] openat(-1, "/proc/self/exe", O_RDONLY [pid 1790] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1796] <... openat resumed>) = 6 [pid 1796] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1790] <... futex resumed>) = 0 [pid 1796] <... futex resumed>) = 1 [pid 1790] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1796] sendfile(4, 6, NULL, 140737974943952 [pid 1790] <... futex resumed>) = 0 [pid 1796] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1790] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1796] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1790] <... futex resumed>) = 0 [pid 1796] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1800 attached [pid 1797] <... open resumed>) = 3 [pid 1797] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1795] <... write resumed>) = 1048576 [pid 1800] set_robust_list(0x5555564066e0, 24 [pid 1797] <... futex resumed>) = 1 [pid 1789] <... futex resumed>) = 0 [pid 1800] <... set_robust_list resumed>) = 0 [pid 1797] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1789] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1800] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1797] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1789] <... futex resumed>) = 0 [pid 1800] <... prctl resumed>) = 0 [pid 1797] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1795] munmap(0x7f6f98bca000, 1048576 [pid 1789] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1800] setpgid(0, 0 [pid 1797] <... mount resumed>) = 0 [pid 1795] <... munmap resumed>) = 0 [pid 1800] <... setpgid resumed>) = 0 [pid 1797] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1795] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1800] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1797] <... futex resumed>) = 1 [pid 1794] <... write resumed>) = 1048576 [pid 1789] <... futex resumed>) = 0 [pid 1800] <... openat resumed>) = 3 [pid 1797] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1794] munmap(0x7f6f98bca000, 1048576 [pid 1789] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1800] write(3, "1000", 4 [pid 1794] <... munmap resumed>) = 0 [pid 1789] <... futex resumed>) = 0 [pid 1787] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1789] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1800] <... write resumed>) = 4 [pid 1800] close(3) = 0 [pid 1800] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1800] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1800] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1800] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1803], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1803 [pid 1800] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1800] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1800] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1800] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1800] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1804], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1804 [pid 1800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1804 attached [pid 1804] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1804] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1803 attached [pid 1803] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1803] memfd_create("syzkaller", 0) = 4 [pid 1803] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1803] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1797] <... open resumed>) = 6 [pid 1795] <... openat resumed>) = 5 [pid 1794] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1787] ioctl(7, LOOP_CLR_FD [pid 1768] +++ exited with 0 +++ [pid 1764] +++ exited with 0 +++ [pid 1797] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [ 31.213804][ T1792] loop3: detected capacity change from 0 to 2048 [ 31.222557][ T1787] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.243104][ T1792] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1795] ioctl(5, LOOP_SET_FD, 4 [pid 1794] <... openat resumed>) = 7 [pid 1787] <... ioctl resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1764, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1797] <... futex resumed>) = 1 [pid 1789] <... futex resumed>) = 0 [pid 1797] openat(-1, "/proc/self/exe", O_RDONLY [pid 1794] ioctl(7, LOOP_SET_FD, 5 [pid 1789] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1787] close(7 [pid 1795] <... ioctl resumed>) = 0 [pid 1797] <... openat resumed>) = 7 [pid 1789] <... futex resumed>) = 0 [pid 1789] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1804] <... open resumed>) = 3 [pid 1804] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1800] <... futex resumed>) = 0 [pid 1804] <... futex resumed>) = 1 [pid 1800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1804] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1800] <... futex resumed>) = 0 [pid 1804] <... mount resumed>) = 0 [pid 1800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1804] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1800] <... futex resumed>) = 0 [pid 1804] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1804] <... open resumed>) = 5 [pid 1800] <... futex resumed>) = 0 [pid 1804] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1804] <... futex resumed>) = 0 [pid 1800] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1804] openat(-1, "/proc/self/exe", O_RDONLY [pid 1800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1804] <... openat resumed>) = 6 [pid 1800] <... futex resumed>) = 0 [pid 1804] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1804] <... futex resumed>) = 0 [pid 1800] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1804] sendfile(5, 6, NULL, 140737974943952 [pid 1800] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1797] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1795] close(4 [pid 1794] <... ioctl resumed>) = 0 [pid 1787] <... close resumed>) = 0 [pid 1800] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1797] <... futex resumed>) = 1 [pid 1795] <... close resumed>) = 0 [pid 1794] close(5 [pid 1792] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1789] <... futex resumed>) = 0 [pid 1787] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1783] exit_group(0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1797] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1795] mkdir("./bus", 0777 [pid 1794] <... close resumed>) = 0 [pid 1792] ioctl(7, LOOP_CLR_FD [pid 1789] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1788] <... futex resumed>) = ? [pid 1787] <... futex resumed>) = ? [pid 1783] <... exit_group resumed>) = ? [pid 408] <... openat resumed>) = 3 [pid 1804] <... sendfile resumed>) = 1048576 [pid 1797] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1795] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1794] mkdir("./bus", 0777 [pid 1792] <... ioctl resumed>) = 0 [pid 1789] <... futex resumed>) = 0 [pid 1788] +++ exited with 0 +++ [pid 1787] +++ exited with 0 +++ [pid 1804] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1789] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1783] +++ exited with 0 +++ [pid 408] ioctl(3, LOOP_CLR_FD [pid 1804] <... futex resumed>) = 1 [pid 1800] <... futex resumed>) = 0 [pid 1797] sendfile(6, 7, NULL, 140737974943952 [pid 1795] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1794] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1792] close(7 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1804] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1783, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1803] munmap(0x7f6f98bca000, 1048576 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1794] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1792] <... close resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 408] close(3 [pid 1803] <... munmap resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1803] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 412] <... ioctl resumed>) = 0 [pid 1803] <... openat resumed>) = 7 [pid 412] close(3 [pid 1803] ioctl(7, LOOP_SET_FD, 4 [pid 412] <... close resumed>) = 0 [pid 1803] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1803] ioctl(7, LOOP_CLR_FD) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1805 ./strace-static-x86_64: Process 1805 attached [pid 1805] set_robust_list(0x5555564066e0, 24) = 0 [pid 1805] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1803] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1803] close(7) = 0 [pid 1803] close(4) = 0 [pid 1792] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1791] exit_group(0 [pid 408] <... close resumed>) = 0 [pid 1791] <... exit_group resumed>) = ? [pid 1803] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1803] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1805] <... prctl resumed>) = 0 [pid 1800] exit_group(0 [pid 1804] <... futex resumed>) = ? [pid 1800] <... exit_group resumed>) = ? [pid 1804] +++ exited with 0 +++ [pid 1803] <... futex resumed>) = ? [pid 1793] <... futex resumed>) = ? [pid 1793] +++ exited with 0 +++ [pid 1792] <... futex resumed>) = ? [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1805] setpgid(0, 0 [pid 1792] +++ exited with 0 +++ [pid 1791] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1791, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1806 [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 1805] <... setpgid resumed>) = 0 [pid 1805] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1805] write(3, "1000", 4) = 4 [pid 1805] close(3 [pid 410] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 1806 attached [pid 1805] <... close resumed>) = 0 [pid 1795] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1805] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1805] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1805] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1805] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1807], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1807 [pid 1805] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1805] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1805] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1805] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1805] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1808], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1808 [pid 1805] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1805] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1795] ioctl(5, LOOP_CLR_FD [pid 1806] set_robust_list(0x5555564066e0, 24 [pid 1795] <... ioctl resumed>) = 0 [pid 410] <... openat resumed>) = 3 ./strace-static-x86_64: Process 1807 attached [pid 1806] <... set_robust_list resumed>) = 0 [pid 1795] close(5 [pid 410] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 1808 attached [pid 1797] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1808] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1806] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1797] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1795] <... close resumed>) = 0 [pid 410] <... ioctl resumed>) = 0 [pid 1808] <... set_robust_list resumed>) = 0 [pid 1806] <... prctl resumed>) = 0 [pid 1797] <... futex resumed>) = 1 [pid 1795] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1789] <... futex resumed>) = 0 [pid 410] close(3 [pid 1808] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1806] setpgid(0, 0 [pid 1797] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1795] <... futex resumed>) = 0 [pid 1789] exit_group(0 [pid 410] <... close resumed>) = 0 [pid 1807] set_robust_list(0x7f6fa100b9e0, 24 [pid 1806] <... setpgid resumed>) = 0 [pid 1797] <... futex resumed>) = ? [pid 1789] <... exit_group resumed>) = ? [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1807] <... set_robust_list resumed>) = 0 [pid 1806] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1795] +++ exited with 0 +++ [pid 1807] memfd_create("syzkaller", 0 [pid 1806] <... openat resumed>) = 3 [pid 1807] <... memfd_create resumed>) = 4 [pid 1806] write(3, "1000", 4 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1811 [pid 1807] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1806] <... write resumed>) = 4 [pid 1797] +++ exited with 0 +++ [pid 1789] +++ exited with 0 +++ [pid 1806] close(3 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1789, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1806] <... close resumed>) = 0 [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 1806] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1807] <... mmap resumed>) = 0x7f6f98bca000 [pid 1806] <... futex resumed>) = 0 [ 31.260062][ T1795] loop4: detected capacity change from 0 to 2048 [ 31.267113][ T1794] loop2: detected capacity change from 0 to 2048 [ 31.282337][ T1795] EXT4-fs (loop4): VFS: Can't find ext4 filesystem [ 31.289575][ T1797] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 31.305297][ T1797] File: /root/bus PID: 1797 Comm: syz-executor138 [pid 1807] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1806] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 411] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 1811 attached [pid 1811] set_robust_list(0x5555564066e0, 24) = 0 [pid 1811] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1811] setpgid(0, 0) = 0 [pid 1811] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1811] write(3, "1000", 4) = 4 [pid 1811] close(3) = 0 [pid 1811] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1811] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1811] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1811] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1812], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1812 [pid 1811] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1811] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1811] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1811] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1811] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1813], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1813 [pid 1811] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1811] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1806] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1806] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1806] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 411] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1806] <... clone resumed>, parent_tid=[1814], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1814 [pid 411] <... ioctl resumed>) = 0 [pid 1806] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] close(3 [pid 1806] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 1806] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1815 attached ./strace-static-x86_64: Process 1814 attached ./strace-static-x86_64: Process 1813 attached ./strace-static-x86_64: Process 1812 attached [pid 1807] <... write resumed>) = 1048576 [pid 1806] <... futex resumed>) = 0 [pid 1815] set_robust_list(0x5555564066e0, 24 [pid 1814] set_robust_list(0x7f6fa100b9e0, 24 [pid 1813] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1812] set_robust_list(0x7f6fa100b9e0, 24 [pid 1807] munmap(0x7f6f98bca000, 1048576 [pid 1806] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1815 [pid 1815] <... set_robust_list resumed>) = 0 [pid 1814] <... set_robust_list resumed>) = 0 [pid 1813] <... set_robust_list resumed>) = 0 [pid 1806] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1794] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1814] memfd_create("syzkaller", 0 [pid 1813] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1812] <... set_robust_list resumed>) = 0 [pid 1807] <... munmap resumed>) = 0 [pid 1806] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1794] ioctl(7, LOOP_CLR_FD [pid 1814] <... memfd_create resumed>) = 3 [pid 1806] <... mprotect resumed>) = 0 [pid 1794] <... ioctl resumed>) = 0 [pid 1814] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1807] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1806] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1794] close(7 [pid 1814] <... mmap resumed>) = 0x7f6f98bca000 [pid 1812] memfd_create("syzkaller", 0 [pid 1794] <... close resumed>) = 0 [pid 1806] <... clone resumed>, parent_tid=[1816], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1816 [pid 1794] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1806] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1794] <... futex resumed>) = 0 [pid 1806] <... futex resumed>) = 0 [pid 1794] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1806] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1816 attached [pid 1816] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1816] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1815] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1815] setpgid(0, 0) = 0 [pid 1815] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1815] write(3, "1000", 4) = 4 [pid 1815] close(3) = 0 [pid 1815] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1815] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1815] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1815] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1817], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1817 [pid 1815] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1815] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1814] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1812] <... memfd_create resumed>) = 4 [pid 1815] <... futex resumed>) = 0 [pid 1790] exit_group(0 [pid 1796] <... futex resumed>) = ? [pid 1794] <... futex resumed>) = ? [pid 1790] <... exit_group resumed>) = ? [pid 1796] +++ exited with 0 +++ [pid 1794] +++ exited with 0 +++ [pid 1815] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1815] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1815] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1818], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1818 [pid 1815] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1815] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1818 attached [pid 1818] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1818] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1817 attached [pid 1812] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1817] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1817] memfd_create("syzkaller", 0) = 4 [pid 1817] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1814] <... write resumed>) = 1048576 [pid 1814] munmap(0x7f6f98bca000, 1048576 [pid 1812] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1817] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1814] <... munmap resumed>) = 0 [pid 1814] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 5 [pid 1818] <... open resumed>) = 3 [pid 1816] <... open resumed>) = 4 [pid 1814] ioctl(5, LOOP_SET_FD, 3 [pid 1813] <... open resumed>) = 3 [pid 1812] <... write resumed>) = 1048576 [pid 1808] <... open resumed>) = 3 [pid 1807] <... openat resumed>) = 5 [pid 1816] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1816] <... futex resumed>) = 1 [pid 1808] <... futex resumed>) = 1 [pid 1806] <... futex resumed>) = 0 [pid 1805] <... futex resumed>) = 0 [pid 1816] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1808] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1806] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [ 31.317401][ T1794] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.357392][ T1807] loop5: detected capacity change from 0 to 2048 [pid 1805] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1818] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1816] <... mount resumed>) = 0 [pid 1813] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1808] <... mount resumed>) = 0 [pid 1807] ioctl(5, LOOP_SET_FD, 4 [pid 1806] <... futex resumed>) = 0 [pid 1805] <... futex resumed>) = 0 [pid 1818] <... futex resumed>) = 1 [pid 1813] <... futex resumed>) = 1 [pid 1811] <... futex resumed>) = 0 [pid 1816] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1815] <... futex resumed>) = 0 [pid 1808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1806] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1805] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1816] <... futex resumed>) = 0 [pid 1815] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1808] <... futex resumed>) = 0 [pid 1806] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1805] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1816] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1815] <... futex resumed>) = 0 [pid 1808] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1806] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1805] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1815] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1806] <... futex resumed>) = 0 [pid 1805] <... futex resumed>) = 0 [pid 1806] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1805] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1811] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1808] <... open resumed>) = 6 [pid 1807] <... ioctl resumed>) = 0 [pid 1818] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1813] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1811] <... futex resumed>) = 0 [pid 1816] <... open resumed>) = 6 [pid 1808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1818] <... mount resumed>) = 0 [pid 1816] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1811] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1808] <... futex resumed>) = 1 [pid 1805] <... futex resumed>) = 0 [pid 1818] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1813] <... mount resumed>) = 0 [pid 1816] <... futex resumed>) = 1 [pid 1808] openat(-1, "/proc/self/exe", O_RDONLY [pid 1806] <... futex resumed>) = 0 [pid 1805] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1816] openat(-1, "/proc/self/exe", O_RDONLY [pid 1808] <... openat resumed>) = 7 [pid 1806] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1805] <... futex resumed>) = 0 [pid 1816] <... openat resumed>) = 7 [pid 1808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1806] <... futex resumed>) = 0 [pid 1805] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1816] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1808] <... futex resumed>) = 0 [pid 1806] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1805] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1816] <... futex resumed>) = 0 [pid 1808] sendfile(6, 7, NULL, 140737974943952 [pid 1806] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1805] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1816] sendfile(6, 7, NULL, 140737974943952 [pid 1806] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1805] <... futex resumed>) = 0 [pid 1806] <... futex resumed>) = 0 [pid 1805] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1806] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1818] <... futex resumed>) = 1 [pid 1815] <... futex resumed>) = 0 [pid 1813] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1818] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1812] munmap(0x7f6f98bca000, 1048576 [pid 1807] close(4 [pid 1815] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1818] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1815] <... futex resumed>) = 0 [pid 1813] <... futex resumed>) = 1 [pid 1811] <... futex resumed>) = 0 [pid 1818] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1813] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1811] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1818] <... open resumed>) = 5 [pid 1815] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1813] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1811] <... futex resumed>) = 0 [pid 1818] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1815] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1814] <... ioctl resumed>) = 0 [pid 1813] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1812] <... munmap resumed>) = 0 [pid 1811] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1807] <... close resumed>) = 0 [pid 1818] <... futex resumed>) = 0 [pid 1817] <... write resumed>) = 1048576 [pid 1815] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1813] <... open resumed>) = 5 [pid 1808] <... sendfile resumed>) = 1048576 [pid 1818] openat(-1, "/proc/self/exe", O_RDONLY [pid 1815] <... futex resumed>) = 0 [pid 1813] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1808] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1818] <... openat resumed>) = 6 [pid 1815] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1813] <... futex resumed>) = 1 [pid 1811] <... futex resumed>) = 0 [pid 1808] <... futex resumed>) = 1 [pid 1805] <... futex resumed>) = 0 [pid 1818] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1815] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1813] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1811] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1808] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1818] <... futex resumed>) = 0 [pid 1817] munmap(0x7f6f98bca000, 1048576 [pid 1816] <... sendfile resumed>) = 1048576 [pid 1815] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1814] close(3 [pid 1812] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1811] <... futex resumed>) = 0 [pid 1813] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1807] mkdir("./bus", 0777 [pid 1818] sendfile(5, 6, NULL, 140737974943952 [pid 1813] openat(-1, "/proc/self/exe", O_RDONLY [pid 1811] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1818] <... sendfile resumed>) = 1048576 [pid 1813] <... openat resumed>) = 6 [pid 1818] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1813] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1818] <... futex resumed>) = 0 [pid 1813] <... futex resumed>) = 1 [pid 1811] <... futex resumed>) = 0 [pid 1818] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1813] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1811] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1813] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1811] <... futex resumed>) = 0 [pid 1813] sendfile(5, 6, NULL, 140737974943952 [pid 1811] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1818] <... futex resumed>) = 0 [pid 1815] <... futex resumed>) = 1 [pid 1813] <... sendfile resumed>) = 1048576 [pid 1790] +++ exited with 0 +++ [pid 1818] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1816] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1815] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1813] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1812] <... openat resumed>) = 7 [pid 1807] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1803] +++ exited with 0 +++ [pid 1800] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1790, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1816] <... futex resumed>) = 1 [pid 1815] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1814] <... close resumed>) = 0 [pid 1813] <... futex resumed>) = 1 [pid 1812] ioctl(7, LOOP_SET_FD, 4 [pid 1811] <... futex resumed>) = 0 [pid 1807] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1806] <... futex resumed>) = 0 [pid 1816] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1814] mkdir("./bus", 0777 [pid 1813] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1812] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1800, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1817] <... munmap resumed>) = 0 [ 31.363793][ T1814] loop1: detected capacity change from 0 to 2048 [pid 1817] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 7 [pid 1817] ioctl(7, LOOP_SET_FD, 4 [pid 1814] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1812] ioctl(7, LOOP_CLR_FD [pid 1807] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1814] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1812] <... ioctl resumed>) = 0 [pid 407] <... restart_syscall resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 409] ioctl(3, LOOP_CLR_FD [pid 407] <... openat resumed>) = 3 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] close(3 [pid 407] ioctl(3, LOOP_CLR_FD [pid 409] <... close resumed>) = 0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] close(3) = 0 [pid 1812] ioctl(7, LOOP_SET_FD, 4 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1819 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1812] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1812] close(7 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1820 [pid 1812] <... close resumed>) = 0 [pid 1812] close(4./strace-static-x86_64: Process 1820 attached ./strace-static-x86_64: Process 1819 attached [pid 1817] <... ioctl resumed>) = 0 [pid 1807] ioctl(5, LOOP_CLR_FD [pid 1820] set_robust_list(0x5555564066e0, 24 [pid 1819] set_robust_list(0x5555564066e0, 24 [pid 1820] <... set_robust_list resumed>) = 0 [pid 1812] <... close resumed>) = 0 [pid 1820] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1819] <... set_robust_list resumed>) = 0 [pid 1812] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1811] exit_group(0 [pid 1820] <... prctl resumed>) = 0 [pid 1819] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1813] <... futex resumed>) = ? [pid 1812] <... futex resumed>) = ? [pid 1811] <... exit_group resumed>) = ? [pid 1820] setpgid(0, 0 [pid 1819] <... prctl resumed>) = 0 [pid 1813] +++ exited with 0 +++ [pid 1820] <... setpgid resumed>) = 0 [pid 1819] setpgid(0, 0 [pid 1820] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1812] +++ exited with 0 +++ [pid 1811] +++ exited with 0 +++ [pid 1820] <... openat resumed>) = 3 [pid 1819] <... setpgid resumed>) = 0 [pid 1820] write(3, "1000", 4 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1811, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1820] <... write resumed>) = 4 [pid 1819] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 1820] close(3 [pid 1819] <... openat resumed>) = 3 [pid 410] <... restart_syscall resumed>) = 0 [pid 1820] <... close resumed>) = 0 [pid 1819] write(3, "1000", 4 [pid 1820] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1819] <... write resumed>) = 4 [pid 1820] <... futex resumed>) = 0 [pid 1819] close(3 [pid 1820] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1819] <... close resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1820] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1819] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1820] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1819] <... futex resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 1820] <... mprotect resumed>) = 0 [pid 1819] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1820] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1819] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1817] close(4 [pid 1807] <... ioctl resumed>) = 0 [pid 1819] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1820] <... clone resumed>, parent_tid=[1823], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1823 [pid 1819] <... mprotect resumed>) = 0 [pid 1820] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1819] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1817] <... close resumed>) = 0 [pid 1807] close(5 [pid 410] <... ioctl resumed>) = 0 [pid 1820] <... futex resumed>) = 0 [pid 1820] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1819] <... clone resumed>, parent_tid=[1824], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1824 [pid 1820] <... futex resumed>) = 0 [pid 1819] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1817] mkdir("./bus", 0777 [pid 1807] <... close resumed>) = 0 [pid 410] close(3 [pid 1820] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1819] <... futex resumed>) = 0 [pid 1817] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1807] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1805] exit_group(0 [pid 410] <... close resumed>) = 0 [pid 1820] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1819] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1817] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1808] <... futex resumed>) = ? [pid 1807] <... futex resumed>) = ? [pid 1805] <... exit_group resumed>) = ? [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1820] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1819] <... futex resumed>) = 0 [pid 1820] <... mprotect resumed>) = 0 [pid 1819] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1808] +++ exited with 0 +++ [pid 1807] +++ exited with 0 +++ [pid 1820] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1819] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1819] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1820] <... clone resumed>, parent_tid=[1826], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1826 [pid 1819] <... mprotect resumed>) = 0 [pid 1805] +++ exited with 0 +++ [pid 1820] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1819] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1805, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1825 [pid 1820] <... futex resumed>) = 0 [pid 1820] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1819] <... clone resumed>, parent_tid=[1827], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1827 [pid 1819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1824 attached ./strace-static-x86_64: Process 1823 attached [pid 1824] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1823] set_robust_list(0x7f6fa100b9e0, 24 [pid 1824] memfd_create("syzkaller", 0 [pid 1823] <... set_robust_list resumed>) = 0 [pid 1824] <... memfd_create resumed>) = 3 [pid 1823] memfd_create("syzkaller", 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 ./strace-static-x86_64: Process 1827 attached ./strace-static-x86_64: Process 1826 attached ./strace-static-x86_64: Process 1825 attached [pid 1824] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1823] <... memfd_create resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1827] set_robust_list(0x7f6fa0fea9e0, 24 [pid 412] <... ioctl resumed>) = 0 [pid 1826] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1825] set_robust_list(0x5555564066e0, 24 [pid 1824] <... mmap resumed>) = 0x7f6f98bca000 [pid 1823] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1827] <... set_robust_list resumed>) = 0 [pid 412] close(3 [pid 1827] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1826] <... set_robust_list resumed>) = 0 [pid 1825] <... set_robust_list resumed>) = 0 [pid 1824] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1823] <... mmap resumed>) = 0x7f6f98bca000 [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1827] <... open resumed>) = 4 [pid 1826] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1825] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1823] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1827] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1826] <... open resumed>) = 4 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1829 [pid 1827] <... futex resumed>) = 1 [pid 1819] <... futex resumed>) = 0 [pid 1827] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1826] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] <... prctl resumed>) = 0 [pid 1819] <... futex resumed>) = 0 [pid 1819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1826] <... futex resumed>) = 1 [pid 1825] setpgid(0, 0 [pid 1820] <... futex resumed>) = 0 [pid 1820] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1820] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1826] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1825] <... setpgid resumed>) = 0 [pid 1826] <... mount resumed>) = 0 [pid 1825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1827] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1826] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] <... openat resumed>) = 3 [pid 1827] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 1829 attached ) = 0 [pid 1826] <... futex resumed>) = 1 [pid 1825] write(3, "1000", 4 [pid 1820] <... futex resumed>) = 0 [pid 1814] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1829] set_robust_list(0x5555564066e0, 24 [pid 1827] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1826] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1825] <... write resumed>) = 4 [pid 1823] <... write resumed>) = 1048576 [pid 1820] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1829] <... set_robust_list resumed>) = 0 [pid 1827] <... futex resumed>) = 1 [pid 1826] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1825] close(3 [pid 1820] <... futex resumed>) = 0 [pid 1819] <... futex resumed>) = 0 [pid 1814] ioctl(5, LOOP_CLR_FD [pid 1829] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1827] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1826] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1825] <... close resumed>) = 0 [pid 1820] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1827] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1826] <... open resumed>) = 5 [pid 1825] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1819] <... futex resumed>) = 0 [pid 1827] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1826] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] <... futex resumed>) = 0 [pid 1819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1829] <... prctl resumed>) = 0 [pid 1827] <... open resumed>) = 5 [pid 1826] <... futex resumed>) = 1 [pid 1825] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1820] <... futex resumed>) = 0 [pid 1829] setpgid(0, 0 [pid 1827] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1826] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1825] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1824] <... write resumed>) = 1048576 [pid 1820] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1829] <... setpgid resumed>) = 0 [pid 1827] <... futex resumed>) = 1 [pid 1826] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1825] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1820] <... futex resumed>) = 0 [pid 1819] <... futex resumed>) = 0 [pid 1829] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1827] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1826] openat(-1, "/proc/self/exe", O_RDONLY [pid 1825] <... mprotect resumed>) = 0 [pid 1820] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1829] <... openat resumed>) = 3 [pid 1827] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1826] <... openat resumed>) = 6 [pid 1825] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1829] write(3, "1000", 4 [pid 1826] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1824] munmap(0x7f6f98bca000, 1048576 [pid 1823] munmap(0x7f6f98bca000, 1048576 [pid 1829] <... write resumed>) = 4 [pid 1826] <... futex resumed>) = 1 [pid 1825] <... clone resumed>, parent_tid=[1831], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1831 [pid 1820] <... futex resumed>) = 0 [pid 1829] close(3 [pid 1827] openat(-1, "/proc/self/exe", O_RDONLY [pid 1826] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1825] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1824] <... munmap resumed>) = 0 [pid 1823] <... munmap resumed>) = 0 [pid 1820] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1819] <... futex resumed>) = 0 [pid 1829] <... close resumed>) = 0 [pid 1827] <... openat resumed>) = 6 [pid 1826] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1825] <... futex resumed>) = 0 [pid 1824] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1823] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1820] <... futex resumed>) = 0 [pid 1819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1829] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1827] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1826] sendfile(5, 6, NULL, 140737974943952 [pid 1825] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1824] <... openat resumed>) = 7 [pid 1823] <... openat resumed>) = 7 [pid 1820] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1819] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1829] <... futex resumed>) = 0 [pid 1827] <... futex resumed>) = 0 [pid 1826] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1825] <... futex resumed>) = 0 [ 31.392227][ T1807] EXT4-fs (loop5): VFS: Can't find ext4 filesystem [ 31.394213][ T1817] loop4: detected capacity change from 0 to 2048 [ 31.416641][ T1814] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1824] ioctl(7, LOOP_SET_FD, 3 [pid 1823] ioctl(7, LOOP_SET_FD, 3 [pid 1819] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1829] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1827] sendfile(5, 6, NULL, 140737974943952 [pid 1826] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1819] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1831 attached [pid 1829] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1826] <... futex resumed>) = 1 [pid 1825] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1823] <... ioctl resumed>) = 0 [pid 1820] <... futex resumed>) = 0 [pid 1829] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1826] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1825] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1829] <... mprotect resumed>) = 0 [pid 1825] <... mprotect resumed>) = 0 [pid 1829] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1825] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1829] <... clone resumed>, parent_tid=[1832], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1832 [pid 1825] <... clone resumed>, parent_tid=[1833], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1833 [pid 1829] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1829] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1829] <... futex resumed>) = 0 [pid 1829] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1829] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1829] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1834], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1834 [pid 1829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1833 attached [pid 1833] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1833] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1832 attached [pid 1832] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1832] memfd_create("syzkaller", 0./strace-static-x86_64: Process 1834 attached [pid 1834] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1834] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1832] <... memfd_create resumed>) = 3 [pid 1832] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1823] close(3) = 0 [pid 1823] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1823] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1819] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1827] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1827] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1819] <... futex resumed>) = 0 [pid 1827] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1832] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1814] <... ioctl resumed>) = 0 [pid 1814] close(5) = 0 [pid 1814] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1814] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1806] exit_group(0 [pid 1816] <... futex resumed>) = ? [pid 1806] <... exit_group resumed>) = ? [pid 1816] +++ exited with 0 +++ [pid 1814] <... futex resumed>) = ? [pid 1831] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1831] memfd_create("syzkaller", 0) = 4 [pid 1832] <... write resumed>) = 1048576 [pid 1831] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1817] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1834] <... open resumed>) = 4 [pid 1833] <... open resumed>) = 3 [pid 1834] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1833] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1834] <... futex resumed>) = 1 [pid 1833] <... futex resumed>) = 1 [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1834] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1833] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1834] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1833] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1834] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1833] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1834] <... mount resumed>) = 0 [pid 1833] <... mount resumed>) = 0 [pid 1834] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1833] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1834] <... futex resumed>) = 1 [pid 1833] <... futex resumed>) = 1 [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1834] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1833] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1834] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1833] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1834] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1833] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1834] <... open resumed>) = 5 [pid 1833] <... open resumed>) = 5 [pid 1831] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1817] ioctl(7, LOOP_CLR_FD [pid 1834] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1833] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1834] <... futex resumed>) = 1 [pid 1833] <... futex resumed>) = 1 [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1834] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1833] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1834] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1833] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1834] openat(-1, "/proc/self/exe", O_RDONLY [pid 1833] openat(-1, "/proc/self/exe", O_RDONLY [pid 1829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1834] <... openat resumed>) = 6 [pid 1833] <... openat resumed>) = 6 [pid 1834] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1833] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1834] <... futex resumed>) = 1 [pid 1833] <... futex resumed>) = 1 [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1834] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1833] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1829] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1825] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1834] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1833] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1829] <... futex resumed>) = 0 [pid 1825] <... futex resumed>) = 0 [pid 1834] sendfile(5, 6, NULL, 140737974943952 [pid 1833] sendfile(5, 6, NULL, 140737974943952 [pid 1829] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1825] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1824] <... ioctl resumed>) = 0 [pid 1832] munmap(0x7f6f98bca000, 1048576 [pid 1831] <... write resumed>) = 1048576 [pid 1832] <... munmap resumed>) = 0 [pid 1831] munmap(0x7f6f98bca000, 1048576 [pid 1832] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1831] <... munmap resumed>) = 0 [pid 1831] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 7 [pid 1831] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1831] ioctl(7, LOOP_CLR_FD) = 0 [ 31.469005][ T1823] loop0: detected capacity change from 0 to 2048 [ 31.475369][ T1817] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.475392][ T1824] loop2: detected capacity change from 0 to 2048 [ 31.491524][ T120] blk_update_request: I/O error, dev loop2, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [ 31.503450][ T120] blk_update_request: I/O error, dev loop2, sector 0 op 0x1:(WRITE) flags 0x8800 phys_seg 16 prio class 0 [pid 1824] close(3 [pid 1833] <... sendfile resumed>) = 1048576 [pid 1833] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1825] <... futex resumed>) = 0 [pid 1833] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1834] <... sendfile resumed>) = 1048576 [pid 1834] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1829] <... futex resumed>) = 0 [pid 1834] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1824] <... close resumed>) = 0 [pid 1824] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1824] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1831] ioctl(7, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1831] close(7) = 0 [pid 1831] close(4) = 0 [pid 1831] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1825] exit_group(0 [pid 1833] <... futex resumed>) = 231 [pid 1825] <... exit_group resumed>) = ? [pid 1823] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1833] +++ exited with 0 +++ [pid 1823] ioctl(7, LOOP_CLR_FD) = 0 [pid 1823] close(7) = 0 [pid 1823] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1820] exit_group(0) = ? [pid 1823] +++ exited with 0 +++ [pid 1831] +++ exited with 0 +++ [pid 1826] <... futex resumed>) = ? [pid 1825] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1825, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1826] +++ exited with 0 +++ [pid 1820] +++ exited with 0 +++ [pid 410] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1820, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = 0 [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1837 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1838 attached , child_tidptr=0x5555564066d0) = 1838 [pid 1838] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 1837 attached [pid 1832] <... openat resumed>) = 7 [pid 1814] +++ exited with 0 +++ [pid 1806] +++ exited with 0 +++ [pid 1838] <... set_robust_list resumed>) = 0 [pid 1837] set_robust_list(0x5555564066e0, 24 [pid 1832] ioctl(7, LOOP_SET_FD, 3 [pid 1817] <... ioctl resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1806, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1838] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1837] <... set_robust_list resumed>) = 0 [pid 1838] <... prctl resumed>) = 0 [pid 1837] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1838] setpgid(0, 0 [pid 1837] <... prctl resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1838] <... setpgid resumed>) = 0 [pid 1837] setpgid(0, 0 [pid 408] <... openat resumed>) = 3 [pid 1838] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1837] <... setpgid resumed>) = 0 [pid 408] ioctl(3, LOOP_CLR_FD [pid 1838] <... openat resumed>) = 3 [pid 1837] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1838] write(3, "1000", 4 [pid 1837] <... openat resumed>) = 3 [pid 408] close(3 [pid 1838] <... write resumed>) = 4 [pid 1837] write(3, "1000", 4 [pid 408] <... close resumed>) = 0 [pid 1838] close(3 [pid 1837] <... write resumed>) = 4 [pid 1817] close(7 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1838] <... close resumed>) = 0 [pid 1837] close(3 [pid 1817] <... close resumed>) = 0 [pid 1838] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1837] <... close resumed>) = 0 [pid 1817] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1842 [pid 1815] exit_group(0 [pid 1818] <... futex resumed>) = ? [pid 1815] <... exit_group resumed>) = ? [pid 1838] <... futex resumed>) = 0 [pid 1837] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1818] +++ exited with 0 +++ [pid 1838] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1837] <... futex resumed>) = 0 [pid 1838] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1837] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1838] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1837] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1838] <... mprotect resumed>) = 0 [pid 1837] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1838] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1837] <... mprotect resumed>) = 0 [pid 1837] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1838] <... clone resumed>, parent_tid=[1843], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1843 [pid 1838] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1837] <... clone resumed>, parent_tid=[1844], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1844 [pid 1838] <... futex resumed>) = 0 [pid 1837] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1838] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1837] <... futex resumed>) = 0 [pid 1838] <... futex resumed>) = 0 [pid 1837] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1838] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1837] <... futex resumed>) = 0 [pid 1817] <... futex resumed>) = ? [pid 1838] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1837] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1817] +++ exited with 0 +++ [pid 1815] +++ exited with 0 +++ [pid 1838] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1837] <... mmap resumed>) = 0x7f6fa0fca000 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1815, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [ 31.539656][ T1823] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.575786][ T1832] loop5: detected capacity change from 0 to 2048 [pid 1838] <... mprotect resumed>) = 0 [pid 1837] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1838] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1837] <... mprotect resumed>) = 0 [pid 1837] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1838] <... clone resumed>, parent_tid=[1845], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1845 [pid 1838] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1837] <... clone resumed>, parent_tid=[1846], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1846 [pid 1838] <... futex resumed>) = 0 [pid 1837] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1838] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1837] <... futex resumed>) = 0 [pid 1837] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1832] <... ioctl resumed>) = 0 [pid 1832] close(3) = 0 [pid 1832] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1832] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 1842 attached [pid 1842] set_robust_list(0x5555564066e0, 24) = 0 [pid 1842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1842] setpgid(0, 0) = 0 [pid 1842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) ./strace-static-x86_64: Process 1844 attached ./strace-static-x86_64: Process 1843 attached [pid 411] close(3./strace-static-x86_64: Process 1846 attached ./strace-static-x86_64: Process 1845 attached [pid 1844] set_robust_list(0x7f6fa100b9e0, 24 [pid 1843] set_robust_list(0x7f6fa100b9e0, 24 [pid 1824] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1846] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1845] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1844] <... set_robust_list resumed>) = 0 [pid 1843] <... set_robust_list resumed>) = 0 [pid 1842] write(3, "1000", 4 [pid 1824] ioctl(7, LOOP_CLR_FD [pid 411] <... close resumed>) = 0 [pid 1846] <... set_robust_list resumed>) = 0 [pid 1845] <... set_robust_list resumed>) = 0 [pid 1844] memfd_create("syzkaller", 0 [pid 1843] memfd_create("syzkaller", 0 [pid 1842] <... write resumed>) = 4 [pid 1824] <... ioctl resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1846] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1845] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1844] <... memfd_create resumed>) = 3 [pid 1843] <... memfd_create resumed>) = 3 [pid 1842] close(3 [pid 1824] close(7 [pid 1846] <... open resumed>) = 4 [pid 1845] <... open resumed>) = 4 [pid 1844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1843] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1842] <... close resumed>) = 0 [pid 1824] <... close resumed>) = 0 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1847 [pid 1846] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1845] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1844] <... mmap resumed>) = 0x7f6f98bca000 [pid 1843] <... mmap resumed>) = 0x7f6f98bca000 [pid 1842] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1824] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1846] <... futex resumed>) = 1 [pid 1845] <... futex resumed>) = 1 [pid 1838] <... futex resumed>) = 0 [pid 1837] <... futex resumed>) = 0 [pid 1819] exit_group(0 [pid 1838] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1837] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1827] <... futex resumed>) = ? [pid 1819] <... exit_group resumed>) = ? [pid 1824] <... futex resumed>) = ? [pid 1838] <... futex resumed>) = 0 [pid 1837] <... futex resumed>) = 0 [pid 1827] +++ exited with 0 +++ [pid 1838] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1837] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1824] +++ exited with 0 +++ [pid 1819] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1819, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 409] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 1845] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1842] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1846] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1845] <... mount resumed>) = 0 [pid 1842] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 409] <... openat resumed>) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = 0 [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1846] <... mount resumed>) = 0 [pid 1845] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1842] <... mmap resumed>) = 0x7f6fa0feb000 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1849 [pid 1842] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1845] <... futex resumed>) = 1 [pid 1842] <... mprotect resumed>) = 0 [pid 1838] <... futex resumed>) = 0 [pid 1846] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1838] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1845] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1842] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1838] <... futex resumed>) = 0 [pid 1838] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1850 attached ./strace-static-x86_64: Process 1849 attached ./strace-static-x86_64: Process 1847 attached [pid 1846] <... futex resumed>) = 1 [pid 1845] <... open resumed>) = 5 [pid 1844] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1843] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1837] <... futex resumed>) = 0 [pid 1837] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1847] set_robust_list(0x5555564066e0, 24 [pid 1837] <... futex resumed>) = 0 [pid 1847] <... set_robust_list resumed>) = 0 [pid 1837] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1847] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1847] setpgid(0, 0) = 0 [pid 1847] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1847] write(3, "1000", 4) = 4 [pid 1847] close(3) = 0 [pid 1847] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1847] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1847] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1849] set_robust_list(0x5555564066e0, 24 [pid 1847] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1849] <... set_robust_list resumed>) = 0 [pid 1849] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1847] <... clone resumed>, parent_tid=[1852], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1852 [pid 1850] set_robust_list(0x7f6fa100b9e0, 24 [pid 1849] <... prctl resumed>) = 0 [pid 1847] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1846] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1845] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1842] <... clone resumed>, parent_tid=[1850], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1850 [pid 1850] <... set_robust_list resumed>) = 0 [pid 1849] setpgid(0, 0 [pid 1847] <... futex resumed>) = 0 [pid 1846] <... open resumed>) = 5 [pid 1845] <... futex resumed>) = 1 [pid 1844] <... write resumed>) = 1048576 [pid 1842] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1838] <... futex resumed>) = 0 [pid 1847] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1838] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1847] <... futex resumed>) = 0 [pid 1838] <... futex resumed>) = 0 [pid 1849] <... setpgid resumed>) = 0 [pid 1847] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1842] <... futex resumed>) = 0 [pid 1838] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1847] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1845] openat(-1, "/proc/self/exe", O_RDONLY [pid 1842] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1849] <... openat resumed>) = 3 [pid 1847] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1846] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1845] <... openat resumed>) = 6 [pid 1842] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1852 attached [pid 1850] memfd_create("syzkaller", 0 [pid 1849] write(3, "1000", 4 [pid 1847] <... mprotect resumed>) = 0 [pid 1846] <... futex resumed>) = 1 [pid 1845] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1844] munmap(0x7f6f98bca000, 1048576 [pid 1843] <... write resumed>) = 1048576 [ 31.600088][ T1824] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.639492][ T1832] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1842] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1837] <... futex resumed>) = 0 [pid 1852] set_robust_list(0x7f6fa100b9e0, 24 [pid 1850] <... memfd_create resumed>) = 3 [pid 1849] <... write resumed>) = 4 [pid 1847] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1846] openat(-1, "/proc/self/exe", O_RDONLY [pid 1845] <... futex resumed>) = 1 [pid 1844] <... munmap resumed>) = 0 [pid 1843] munmap(0x7f6f98bca000, 1048576 [pid 1842] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1838] <... futex resumed>) = 0 [pid 1837] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1832] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1852] <... set_robust_list resumed>) = 0 [pid 1850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1849] close(3 [pid 1846] <... openat resumed>) = 6 [pid 1845] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1844] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1843] <... munmap resumed>) = 0 [pid 1842] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1838] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1837] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1853 attached [pid 1852] memfd_create("syzkaller", 0 [pid 1850] <... mmap resumed>) = 0x7f6f98bca000 [pid 1849] <... close resumed>) = 0 [pid 1847] <... clone resumed>, parent_tid=[1853], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1853 [pid 1846] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1845] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1844] <... openat resumed>) = 7 [pid 1843] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1842] <... mprotect resumed>) = 0 [pid 1838] <... futex resumed>) = 0 [pid 1837] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1832] ioctl(7, LOOP_CLR_FD [pid 1852] <... memfd_create resumed>) = 3 [pid 1849] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1844] ioctl(7, LOOP_SET_FD, 3 [pid 1843] <... openat resumed>) = 7 [pid 1838] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1837] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1853] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1850] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1849] <... futex resumed>) = 0 [pid 1847] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1846] <... futex resumed>) = 0 [pid 1845] sendfile(5, 6, NULL, 140737974943952 [pid 1844] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1843] ioctl(7, LOOP_SET_FD, 3 [pid 1842] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1837] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1832] <... ioctl resumed>) = 0 [pid 1853] <... set_robust_list resumed>) = 0 [pid 1852] <... mmap resumed>) = 0x7f6f98bca000 [pid 1849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1847] <... futex resumed>) = 0 [pid 1846] sendfile(5, 6, NULL, 140737974943952 [pid 1845] <... sendfile resumed>) = 1048576 [pid 1844] ioctl(7, LOOP_CLR_FD [pid 1837] <... futex resumed>) = 0 [pid 1832] close(7 [pid 1853] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1852] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1850] <... write resumed>) = 1048576 [pid 1844] <... ioctl resumed>) = 0 [pid 1852] <... write resumed>) = 1048576 [pid 1849] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1847] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1845] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1842] <... clone resumed>, parent_tid=[1854], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1854 [pid 1837] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1832] <... close resumed>) = 0 [pid 1852] munmap(0x7f6f98bca000, 1048576 [pid 1849] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1845] <... futex resumed>) = 1 [pid 1842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1838] <... futex resumed>) = 0 [pid 1852] <... munmap resumed>) = 0 [pid 1845] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1842] <... futex resumed>) = 0 [pid 1849] <... mprotect resumed>) = 0 [pid 1832] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1852] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 1852] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 1854 attached [pid 1853] <... open resumed>) = 5 [pid 1850] munmap(0x7f6f98bca000, 1048576 [pid 1849] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1846] <... sendfile resumed>) = 1048576 [pid 1843] <... ioctl resumed>) = 0 [pid 1842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1832] <... futex resumed>) = 0 [pid 1844] ioctl(7, LOOP_SET_FD, 3 [pid 1853] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1844] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1850] <... munmap resumed>) = 0 [pid 1844] close(7 [pid 1846] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1844] <... close resumed>) = 0 [pid 1832] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1853] <... futex resumed>) = 1 [pid 1847] <... futex resumed>) = 0 [pid 1846] <... futex resumed>) = 1 [pid 1844] close(3 [pid 1849] <... clone resumed>, parent_tid=[1855], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1855 [pid 1837] <... futex resumed>) = 0 [pid 1850] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1829] exit_group(0 [pid 1854] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1853] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1847] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1846] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1844] <... close resumed>) = 0 [pid 1843] close(3 [pid 1854] <... set_robust_list resumed>) = 0 [pid 1853] <... mount resumed>) = 0 [pid 1850] <... openat resumed>) = 4 [pid 1849] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1847] <... futex resumed>) = 0 [pid 1844] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1837] exit_group(0 [pid 1834] <... futex resumed>) = ? [pid 1832] <... futex resumed>) = ? [pid 1829] <... exit_group resumed>) = ? [pid 1843] <... close resumed>) = 0 [pid 1844] <... futex resumed>) = 0 [pid 1844] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1855 attached [pid 1855] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1855] memfd_create("syzkaller", 0 [pid 1853] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1850] ioctl(4, LOOP_SET_FD, 3 [pid 1849] <... futex resumed>) = 0 [pid 1847] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1844] <... futex resumed>) = ? [pid 1837] <... exit_group resumed>) = ? [pid 1834] +++ exited with 0 +++ [pid 1832] +++ exited with 0 +++ [pid 1844] +++ exited with 0 +++ [pid 1855] <... memfd_create resumed>) = 3 [pid 1855] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 1829] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1829, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1855] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1852] <... ioctl resumed>) = 0 [pid 1852] close(3) = 0 [pid 1852] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1852] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1855] <... write resumed>) = 1048576 [pid 1854] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1853] <... futex resumed>) = 0 [pid 1850] <... ioctl resumed>) = 0 [pid 1849] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1847] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1846] <... futex resumed>) = ? [pid 1843] mkdir("./bus", 0777 [pid 1854] <... open resumed>) = 5 [pid 1853] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1850] close(3 [pid 1849] <... futex resumed>) = 0 [pid 1847] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1846] +++ exited with 0 +++ [pid 1843] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1837] +++ exited with 0 +++ [pid 1854] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1853] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1850] <... close resumed>) = 0 [pid 1849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1847] <... futex resumed>) = 0 [pid 1843] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1854] <... futex resumed>) = 1 [pid 1853] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1850] mkdir("./bus", 0777 [pid 1849] <... mmap resumed>) = 0x7f6f98bca000 [pid 1847] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1842] <... futex resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1837, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1854] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1853] <... open resumed>) = 3 [pid 1850] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1849] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... openat resumed>) = 3 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1854] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1853] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1850] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1849] <... mprotect resumed>) = 0 [pid 1842] <... futex resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD [pid 410] <... openat resumed>) = 3 [pid 1854] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1853] <... futex resumed>) = 1 [pid 1849] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1847] <... futex resumed>) = 0 [pid 1842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] ioctl(3, LOOP_CLR_FD [pid 1854] <... mount resumed>) = 0 [pid 1853] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1847] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] close(3 [pid 410] <... ioctl resumed>) = 0 [pid 1855] munmap(0x7f6f98beb000, 1048576 [pid 1854] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1853] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1849] <... clone resumed>, parent_tid=[1857], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1857 [pid 1847] <... futex resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 410] close(3 [pid 1855] <... munmap resumed>) = 0 [pid 1854] <... futex resumed>) = 1 [pid 1853] openat(-1, "/proc/self/exe", O_RDONLY [pid 1849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1847] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1842] <... futex resumed>) = 0 [pid 1855] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1854] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1853] <... openat resumed>) = 6 [pid 1849] <... futex resumed>) = 0 [pid 1842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] <... close resumed>) = 0 [pid 1854] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1853] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1842] <... futex resumed>) = 0 [pid 1854] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1853] <... futex resumed>) = 1 [pid 1847] <... futex resumed>) = 0 [pid 1842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1854] <... open resumed>) = 3 [pid 1853] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1847] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1860 [pid 1854] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1853] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1847] <... futex resumed>) = 0 [pid 1854] <... futex resumed>) = 1 [pid 1853] sendfile(3, 6, NULL, 140737974943952 [pid 1847] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1842] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1861 [pid 1854] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1854] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1842] <... futex resumed>) = 0 [ 31.701784][ T1843] loop0: detected capacity change from 0 to 2048 [ 31.717299][ T1852] loop4: detected capacity change from 0 to 2048 [ 31.732562][ T1850] loop1: detected capacity change from 0 to 2048 [pid 1854] openat(-1, "/proc/self/exe", O_RDONLY [pid 1842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1861 attached ./strace-static-x86_64: Process 1860 attached [pid 1855] <... openat resumed>) = 4 [pid 1854] <... openat resumed>) = 6 [pid 1853] <... sendfile resumed>) = 1048576 [pid 1855] ioctl(4, LOOP_SET_FD, 3 [pid 1854] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1853] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1861] set_robust_list(0x5555564066e0, 24 [pid 1854] <... futex resumed>) = 1 [pid 1853] <... futex resumed>) = 1 [pid 1847] <... futex resumed>) = 0 [pid 1842] <... futex resumed>) = 0 [pid 1854] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1853] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1842] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1854] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1842] <... futex resumed>) = 0 [pid 1854] sendfile(3, 6, NULL, 140737974943952 [pid 1842] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1854] <... sendfile resumed>) = 1048576 [pid 1854] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1842] <... futex resumed>) = 0 [ 31.781006][ T1843] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.783570][ T1855] loop2: detected capacity change from 0 to 2048 [ 31.791544][ T1859] EXT4-fs warning (device loop4): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 31.805613][ T1850] EXT4-fs (loop1): get root inode failed [pid 1854] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1857 attached [pid 1861] <... set_robust_list resumed>) = 0 [pid 1860] set_robust_list(0x5555564066e0, 24 [pid 1849] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1843] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1861] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1860] <... set_robust_list resumed>) = 0 [pid 1857] set_robust_list(0x7f6f98bea9e0, 24 [pid 1849] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1843] ioctl(7, LOOP_CLR_FD [pid 1849] <... futex resumed>) = 0 [pid 1849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6f98cca000 [pid 1849] mprotect(0x7f6f98ccb000, 131072, PROT_READ|PROT_WRITE [pid 1860] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1857] <... set_robust_list resumed>) = 0 [pid 1849] <... mprotect resumed>) = 0 [pid 1861] <... prctl resumed>) = 0 [pid 1860] <... prctl resumed>) = 0 [pid 1857] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1849] clone(child_stack=0x7f6f98cea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1861] setpgid(0, 0 [pid 1860] setpgid(0, 0 [pid 1849] <... clone resumed>, parent_tid=[1865], tls=0x7f6f98cea700, child_tidptr=0x7f6f98cea9d0) = 1865 [pid 1849] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1849] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1861] <... setpgid resumed>) = 0 [pid 1860] <... setpgid resumed>) = 0 [pid 1857] <... open resumed>) = 5 ./strace-static-x86_64: Process 1865 attached [pid 1861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1857] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1855] <... ioctl resumed>) = 0 [pid 1850] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1865] set_robust_list(0x7f6f98cea9e0, 24 [pid 1861] <... openat resumed>) = 3 [pid 1860] <... openat resumed>) = 3 [pid 1857] <... futex resumed>) = 0 [pid 1855] close(3 [pid 1850] ioctl(4, LOOP_CLR_FD [pid 1865] <... set_robust_list resumed>) = 0 [pid 1861] write(3, "1000", 4 [pid 1860] write(3, "1000", 4 [pid 1857] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1855] <... close resumed>) = 0 [pid 1852] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1865] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1861] <... write resumed>) = 4 [pid 1860] <... write resumed>) = 4 [pid 1855] mkdir("./bus", 0777 [pid 1850] <... ioctl resumed>) = 0 [pid 1865] <... mount resumed>) = 0 [pid 1861] close(3 [pid 1860] close(3 [pid 1855] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1852] ioctl(4, LOOP_CLR_FD [pid 1865] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1861] <... close resumed>) = 0 [pid 1860] <... close resumed>) = 0 [pid 1855] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1850] close(4 [pid 1865] <... futex resumed>) = 1 [pid 1861] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1860] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1852] <... ioctl resumed>) = 0 [pid 1850] <... close resumed>) = 0 [pid 1849] <... futex resumed>) = 0 [pid 1865] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1861] <... futex resumed>) = 0 [pid 1860] <... futex resumed>) = 0 [pid 1852] close(4 [pid 1850] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1861] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1860] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1857] <... futex resumed>) = 0 [pid 1852] <... close resumed>) = 0 [pid 1850] <... futex resumed>) = 0 [pid 1849] <... futex resumed>) = 1 [pid 1861] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1860] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1857] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1852] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1850] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1847] exit_group(0 [pid 1842] exit_group(0 [pid 1861] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1860] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1857] <... open resumed>) = 3 [pid 1854] <... futex resumed>) = ? [pid 1853] <... futex resumed>) = ? [pid 1852] <... futex resumed>) = ? [pid 1850] <... futex resumed>) = ? [pid 1847] <... exit_group resumed>) = ? [pid 1842] <... exit_group resumed>) = ? [pid 1861] <... mprotect resumed>) = 0 [pid 1860] <... mprotect resumed>) = 0 [pid 1857] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1854] +++ exited with 0 +++ [pid 1853] +++ exited with 0 +++ [pid 1852] +++ exited with 0 +++ [pid 1850] +++ exited with 0 +++ [pid 1847] +++ exited with 0 +++ [pid 1843] <... ioctl resumed>) = 0 [pid 1842] +++ exited with 0 +++ [pid 1861] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1860] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1857] <... futex resumed>) = 1 [pid 1849] <... futex resumed>) = 0 [pid 1843] close(7 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1842, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1857] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1843] <... close resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1847, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1861] <... clone resumed>, parent_tid=[1867], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1867 [pid 1860] <... clone resumed>, parent_tid=[1868], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1868 [pid 1857] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1849] <... futex resumed>) = 0 [pid 1843] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 408] <... restart_syscall resumed>) = 0 [pid 1861] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1860] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1857] openat(-1, "/proc/self/exe", O_RDONLY [pid 1849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1843] <... futex resumed>) = 0 [pid 1838] exit_group(0 [pid 1861] <... futex resumed>) = 0 [pid 1860] <... futex resumed>) = 0 [pid 1857] <... openat resumed>) = 6 [pid 1845] <... futex resumed>) = ? [pid 1838] <... exit_group resumed>) = ? [pid 1861] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1860] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1857] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1845] +++ exited with 0 +++ [pid 1843] +++ exited with 0 +++ [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1861] <... futex resumed>) = 0 [pid 1860] <... futex resumed>) = 0 [pid 1857] <... futex resumed>) = 1 [pid 1849] <... futex resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 1861] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1860] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1857] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1849] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 1867 attached [pid 1861] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1860] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1857] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1849] <... futex resumed>) = 0 [pid 408] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 1868 attached [pid 1867] set_robust_list(0x7f6fa100b9e0, 24 [pid 408] close(3 [pid 1868] set_robust_list(0x7f6fa100b9e0, 24 [pid 1867] <... set_robust_list resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 1868] <... set_robust_list resumed>) = 0 [pid 1867] memfd_create("syzkaller", 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1868] memfd_create("syzkaller", 0 [pid 1867] <... memfd_create resumed>) = 3 [pid 1868] <... memfd_create resumed>) = 3 [pid 1867] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1870 [pid 1868] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1867] <... mmap resumed>) = 0x7f6f98bca000 [pid 1861] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1860] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1857] sendfile(3, 6, NULL, 140737974943952 [pid 1849] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1868] <... mmap resumed>) = 0x7f6f98bca000 [pid 1867] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1861] <... mprotect resumed>) = 0 [pid 1860] <... mprotect resumed>) = 0 [ 31.826867][ T1850] EXT4-fs (loop1): mount failed [ 31.835651][ T1852] EXT4-fs (loop4): get root inode failed [ 31.844667][ T1852] EXT4-fs (loop4): mount failed [pid 1868] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1861] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1860] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1857] <... sendfile resumed>) = 1048576 [pid 1857] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1861] <... clone resumed>, parent_tid=[1871], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1871 [pid 1860] <... clone resumed>, parent_tid=[1872], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1872 [pid 1857] <... futex resumed>) = 1 [pid 1849] <... futex resumed>) = 0 [pid 1861] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1860] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1857] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1861] <... futex resumed>) = 0 [pid 1860] <... futex resumed>) = 0 [pid 1861] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1870 attached [pid 1870] set_robust_list(0x5555564066e0, 24) = 0 [pid 1870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1870] setpgid(0, 0) = 0 ./strace-static-x86_64: Process 1872 attached [pid 1872] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1872] <... set_robust_list resumed>) = 0 [pid 1872] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1870] <... openat resumed>) = 3 [pid 1870] write(3, "1000", 4) = 4 [pid 1870] close(3) = 0 [pid 1872] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1870] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1872] <... futex resumed>) = 0 [pid 1870] <... futex resumed>) = 0 [pid 1872] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1870] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1870] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1860] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1871 attached [pid 1870] <... mprotect resumed>) = 0 [pid 1868] <... write resumed>) = 1048576 [pid 1860] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1855] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1871] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1860] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1855] ioctl(4, LOOP_CLR_FD [pid 1871] <... set_robust_list resumed>) = 0 [pid 1870] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1860] <... futex resumed>) = 1 [pid 1855] <... ioctl resumed>) = 0 [pid 1871] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1860] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1855] close(4./strace-static-x86_64: Process 1873 attached [pid 1872] <... futex resumed>) = 0 [pid 1871] <... open resumed>) = 4 [pid 1868] munmap(0x7f6f98bca000, 1048576 [pid 1867] <... write resumed>) = 1048576 [pid 1871] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1855] <... close resumed>) = 0 [pid 1871] <... futex resumed>) = 1 [pid 1861] <... futex resumed>) = 0 [pid 1871] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1861] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1855] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1871] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1861] <... futex resumed>) = 0 [pid 1855] <... futex resumed>) = 0 [pid 1849] exit_group(0 [pid 1871] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1865] <... futex resumed>) = ? [pid 1861] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1857] <... futex resumed>) = ? [pid 1849] <... exit_group resumed>) = ? [pid 1871] <... mount resumed>) = 0 [pid 1865] +++ exited with 0 +++ [pid 1857] +++ exited with 0 +++ [pid 411] <... openat resumed>) = 3 [pid 1871] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1871] <... futex resumed>) = 1 [pid 1861] <... futex resumed>) = 0 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1871] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1861] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] close(3 [pid 1871] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1861] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 1871] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1861] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1873] set_robust_list(0x7f6fa100b9e0, 24 [pid 1872] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1870] <... clone resumed>, parent_tid=[1873], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1873 [pid 1868] <... munmap resumed>) = 0 [pid 1867] munmap(0x7f6f98bca000, 1048576./strace-static-x86_64: Process 1874 attached [pid 1874] set_robust_list(0x5555564066e0, 24 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1874 [pid 1874] <... set_robust_list resumed>) = 0 [pid 1874] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1872] <... mount resumed>) = 0 [pid 1870] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1874] <... prctl resumed>) = 0 [pid 1872] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1870] <... futex resumed>) = 0 [pid 1874] setpgid(0, 0) = 0 [pid 1874] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1872] <... futex resumed>) = 1 [pid 1870] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1860] <... futex resumed>) = 0 [pid 1874] write(3, "1000", 4 [pid 1872] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1860] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1874] <... write resumed>) = 4 [pid 1860] <... futex resumed>) = 0 [pid 1874] close(3 [pid 1860] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1874] <... close resumed>) = 0 [pid 1874] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1874] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1874] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1874] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1872] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1870] <... futex resumed>) = 0 [pid 1872] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1870] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1874] <... clone resumed>, parent_tid=[1875], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1875 [pid 1874] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1874] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1872] <... open resumed>) = 5 [pid 1870] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1872] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1874] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1870] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1872] <... futex resumed>) = 1 [pid 1860] <... futex resumed>) = 0 [pid 1872] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1870] <... mprotect resumed>) = 0 [pid 1860] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1874] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1860] <... futex resumed>) = 0 [pid 1870] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1872] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1860] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1874] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1874] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1872] openat(-1, "/proc/self/exe", O_RDONLY [pid 1874] <... clone resumed>, parent_tid=[1877], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1877 [pid 1874] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1872] <... openat resumed>) = 6 [pid 1870] <... clone resumed>, parent_tid=[1876], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1876 [pid 1868] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1874] <... futex resumed>) = 0 [pid 1872] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1877 attached ./strace-static-x86_64: Process 1876 attached ./strace-static-x86_64: Process 1875 attached [pid 1874] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1873] <... set_robust_list resumed>) = 0 [pid 1872] <... futex resumed>) = 1 [pid 1870] <... futex resumed>) = 0 [pid 1867] <... munmap resumed>) = 0 [pid 1860] <... futex resumed>) = 0 [pid 1872] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1868] <... openat resumed>) = 7 [pid 1860] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1872] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1860] <... futex resumed>) = 0 [pid 1872] sendfile(5, 6, NULL, 140737974943952 [pid 1868] ioctl(7, LOOP_SET_FD, 3 [pid 1860] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1867] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1872] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1872] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1860] <... futex resumed>) = 0 [pid 1872] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1877] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1877] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1873] memfd_create("syzkaller", 0 [pid 1875] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1873] <... memfd_create resumed>) = 3 [pid 1875] memfd_create("syzkaller", 0 [pid 1873] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1875] <... memfd_create resumed>) = 4 [pid 1873] <... mmap resumed>) = 0x7f6f98bca000 [pid 1875] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1877] <... open resumed>) = 3 [pid 1876] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1868] <... ioctl resumed>) = 0 [pid 1877] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1876] <... set_robust_list resumed>) = 0 [pid 1868] close(3 [pid 1877] <... futex resumed>) = 1 [pid 1876] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1874] <... futex resumed>) = 0 [pid 1868] <... close resumed>) = 0 [pid 1874] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1874] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1877] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1868] mkdir("./bus", 0777 [pid 1873] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1877] <... mount resumed>) = 0 [pid 1868] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1877] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1868] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1877] <... futex resumed>) = 1 [pid 1874] <... futex resumed>) = 0 [pid 1874] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1874] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1877] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 1876] <... open resumed>) = 4 [pid 1875] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1873] <... write resumed>) = 1048576 [pid 1838] +++ exited with 0 +++ [pid 1877] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1876] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1875] <... write resumed>) = 1048576 [pid 1871] <... open resumed>) = 5 [pid 1867] <... openat resumed>) = 6 [pid 1855] +++ exited with 0 +++ [pid 1849] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1838, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1877] <... futex resumed>) = 1 [pid 1876] <... futex resumed>) = 1 [pid 1874] <... futex resumed>) = 0 [pid 1871] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1870] <... futex resumed>) = 0 [pid 1867] ioctl(6, LOOP_SET_FD, 3 [pid 1877] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1876] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1874] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1871] <... futex resumed>) = 1 [pid 1870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1861] <... futex resumed>) = 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1849, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1877] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1876] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1874] <... futex resumed>) = 0 [pid 1870] <... futex resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1877] openat(-1, "/proc/self/exe", O_RDONLY [pid 1876] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... openat resumed>) = 3 [pid 1877] <... openat resumed>) = 6 [pid 1876] <... mount resumed>) = 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1877] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1876] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1877] <... futex resumed>) = 0 [pid 1876] <... futex resumed>) = 1 [pid 1870] <... futex resumed>) = 0 [ 31.893430][ T1855] EXT4-fs (loop2): get root inode failed [ 31.899088][ T1855] EXT4-fs (loop2): mount failed [ 31.914800][ T1868] loop5: detected capacity change from 0 to 2048 [pid 407] close(3 [pid 1877] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1876] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] <... close resumed>) = 0 [pid 1876] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1870] <... futex resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1876] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1876] <... open resumed>) = 5 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1878 [pid 1876] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1875] munmap(0x7f6f98bca000, 1048576 [pid 1874] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1871] openat(-1, "/proc/self/exe", O_RDONLY [pid 1861] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 1876] <... futex resumed>) = 1 [pid 1875] <... munmap resumed>) = 0 [pid 1874] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1871] <... openat resumed>) = 7 [pid 1870] <... futex resumed>) = 0 [pid 1861] <... futex resumed>) = 0 [pid 1873] munmap(0x7f6f98bca000, 1048576 [pid 409] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 1878 attached [pid 1876] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1875] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1874] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1873] <... munmap resumed>) = 0 [pid 1871] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1867] <... ioctl resumed>) = 0 [pid 1861] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1877] <... futex resumed>) = 0 [pid 1876] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1875] <... openat resumed>) = 7 [pid 1874] <... futex resumed>) = 1 [pid 1871] <... futex resumed>) = 0 [pid 1870] <... futex resumed>) = 0 [pid 1861] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1877] sendfile(5, 6, NULL, 140737974943952 [pid 1876] openat(-1, "/proc/self/exe", O_RDONLY [pid 1875] ioctl(7, LOOP_SET_FD, 4 [pid 1874] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1871] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1861] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] set_robust_list(0x5555564066e0, 24 [pid 1877] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1876] <... openat resumed>) = 6 [pid 1873] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1871] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1867] close(3 [pid 1861] <... futex resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1877] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1876] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1873] <... openat resumed>) = 7 [pid 1871] sendfile(5, 7, NULL, 140737974943952 [pid 1861] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... openat resumed>) = 3 [pid 1867] <... close resumed>) = 0 [pid 1878] <... set_robust_list resumed>) = 0 [pid 1877] <... futex resumed>) = 1 [pid 1876] <... futex resumed>) = 1 [pid 1874] <... futex resumed>) = 0 [pid 1873] ioctl(7, LOOP_SET_FD, 3 [pid 1870] <... futex resumed>) = 0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 1877] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1876] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1870] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... ioctl resumed>) = 0 [pid 1876] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1870] <... futex resumed>) = 0 [pid 409] close(3 [pid 1876] sendfile(5, 6, NULL, 140737974943952 [pid 1870] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1876] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 409] <... close resumed>) = 0 [pid 1876] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1870] <... futex resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1876] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1881 ./strace-static-x86_64: Process 1881 attached [pid 1871] <... sendfile resumed>) = 1048576 [pid 1881] set_robust_list(0x5555564066e0, 24 [pid 1871] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1881] <... set_robust_list resumed>) = 0 [pid 1871] <... futex resumed>) = 1 [pid 1868] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1861] <... futex resumed>) = 0 [pid 1881] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1871] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1868] ioctl(7, LOOP_CLR_FD [pid 1881] <... prctl resumed>) = 0 [pid 1868] <... ioctl resumed>) = 0 [pid 1881] setpgid(0, 0 [pid 1868] close(7 [pid 1867] mkdir("./bus", 0777 [pid 1881] <... setpgid resumed>) = 0 [pid 1868] <... close resumed>) = 0 [pid 1881] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1868] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1881] <... openat resumed>) = 3 [pid 1868] <... futex resumed>) = 0 [pid 1867] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1881] write(3, "1000", 4 [pid 1878] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1868] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1867] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1881] <... write resumed>) = 4 [pid 1878] <... prctl resumed>) = 0 [pid 1860] exit_group(0 [pid 1881] close(3 [pid 1878] setpgid(0, 0 [pid 1872] <... futex resumed>) = ? [pid 1868] <... futex resumed>) = ? [pid 1860] <... exit_group resumed>) = ? [ 31.940552][ T1867] loop3: detected capacity change from 0 to 2048 [ 31.953048][ T1875] loop4: detected capacity change from 0 to 2048 [ 31.966331][ T1868] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 31.966938][ T1873] loop1: detected capacity change from 0 to 2048 [pid 1873] <... ioctl resumed>) = 0 [pid 1873] close(3) = 0 [pid 1873] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1873] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1881] <... close resumed>) = 0 [pid 1872] +++ exited with 0 +++ [pid 1881] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1875] <... ioctl resumed>) = 0 [pid 1875] close(4) = 0 [pid 1875] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1881] <... futex resumed>) = 0 [pid 1881] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1875] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1881] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1881] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1881] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1882], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1882 [pid 1881] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1881] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1881] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1881] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1881] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1883], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1883 [pid 1868] +++ exited with 0 +++ [pid 1860] +++ exited with 0 +++ [pid 1881] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1860, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 412] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 1881] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1884 [pid 1878] <... setpgid resumed>) = 0 [pid 1878] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1878] write(3, "1000", 4) = 4 [pid 1878] close(3) = 0 ./strace-static-x86_64: Process 1884 attached ./strace-static-x86_64: Process 1883 attached ./strace-static-x86_64: Process 1882 attached [pid 1878] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1867] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1884] set_robust_list(0x5555564066e0, 24 [pid 1883] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1882] set_robust_list(0x7f6fa100b9e0, 24 [pid 1878] <... futex resumed>) = 0 [pid 1867] ioctl(6, LOOP_CLR_FD [pid 1884] <... set_robust_list resumed>) = 0 [pid 1883] <... set_robust_list resumed>) = 0 [pid 1882] <... set_robust_list resumed>) = 0 [pid 1878] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1867] <... ioctl resumed>) = 0 [pid 1884] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1883] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1882] memfd_create("syzkaller", 0 [pid 1878] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1867] close(6 [pid 1883] <... open resumed>) = 3 [pid 1878] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1884] <... prctl resumed>) = 0 [pid 1883] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1882] <... memfd_create resumed>) = 4 [pid 1878] <... mprotect resumed>) = 0 [pid 1867] <... close resumed>) = 0 [pid 1884] setpgid(0, 0 [pid 1883] <... futex resumed>) = 1 [pid 1882] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1881] <... futex resumed>) = 0 [pid 1878] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1884] <... setpgid resumed>) = 0 [pid 1883] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1882] <... mmap resumed>) = 0x7f6f98bca000 [pid 1881] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1867] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1884] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1881] <... futex resumed>) = 0 [pid 1878] <... clone resumed>, parent_tid=[1886], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1886 ./strace-static-x86_64: Process 1886 attached [pid 1886] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1886] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1884] <... openat resumed>) = 3 [pid 1883] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1882] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1881] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1878] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1867] <... futex resumed>) = 0 [pid 1886] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1884] write(3, "1000", 4 [pid 1883] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1882] <... write resumed>) = 1048576 [pid 1878] <... futex resumed>) = 0 [pid 1867] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1861] exit_group(0 [pid 1882] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1882] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 5 [pid 1882] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1882] ioctl(5, LOOP_CLR_FD) = 0 [pid 1884] <... write resumed>) = 4 [pid 1878] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1886] memfd_create("syzkaller", 0 [pid 1884] close(3 [pid 1878] <... futex resumed>) = 0 [pid 1886] <... memfd_create resumed>) = 3 [pid 1884] <... close resumed>) = 0 [pid 1883] <... mount resumed>) = 0 [pid 1878] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1861] <... exit_group resumed>) = ? [pid 1878] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1884] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1886] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1884] <... futex resumed>) = 0 [pid 1883] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] <... mprotect resumed>) = 0 [pid 1871] <... futex resumed>) = ? [pid 1867] <... futex resumed>) = ? [pid 1886] <... mmap resumed>) = 0x7f6f98bca000 [pid 1886] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1884] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1883] <... futex resumed>) = 1 [pid 1881] <... futex resumed>) = 0 [pid 1878] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1871] +++ exited with 0 +++ [pid 1884] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1883] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1881] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1884] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1883] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1881] <... futex resumed>) = 0 [pid 1878] <... clone resumed>, parent_tid=[1889], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1889 [pid 1884] <... mprotect resumed>) = 0 [pid 1883] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1881] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1878] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1884] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1883] <... open resumed>) = 6 [pid 1878] <... futex resumed>) = 0 [pid 1883] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1884] <... clone resumed>, parent_tid=[1890], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1890 [pid 1883] <... futex resumed>) = 1 [pid 1881] <... futex resumed>) = 0 [pid 1884] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1883] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1881] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1884] <... futex resumed>) = 0 [pid 1883] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1881] <... futex resumed>) = 0 [pid 1884] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1883] openat(-1, "/proc/self/exe", O_RDONLY [pid 1881] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1884] <... futex resumed>) = 0 [pid 1883] <... openat resumed>) = 7 [pid 1884] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1883] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1884] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1883] <... futex resumed>) = 1 [pid 1881] <... futex resumed>) = 0 [pid 1884] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1883] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1881] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 1890 attached ./strace-static-x86_64: Process 1889 attached [pid 1884] <... mprotect resumed>) = 0 [pid 1883] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1881] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1890] set_robust_list(0x7f6fa100b9e0, 24 [pid 1889] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1884] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [ 31.992843][ T1867] EXT4-fs (loop3): VFS: Can't find ext4 filesystem [ 32.029977][ T1873] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1883] sendfile(6, 7, NULL, 140737974943952 [pid 1886] <... write resumed>) = 1048576 [pid 1886] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1882] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1882] close(5) = 0 [pid 1886] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 1882] close(4 [pid 1886] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 1892 attached [pid 1890] <... set_robust_list resumed>) = 0 [pid 1889] <... set_robust_list resumed>) = 0 [pid 1883] <... sendfile resumed>) = 1048576 [pid 1875] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1892] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1890] memfd_create("syzkaller", 0 [pid 1889] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1884] <... clone resumed>, parent_tid=[1892], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1892 [pid 1883] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1875] ioctl(7, LOOP_CLR_FD [pid 1873] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1892] <... set_robust_list resumed>) = 0 [pid 1890] <... memfd_create resumed>) = 3 [pid 1892] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1890] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1889] <... open resumed>) = 5 [pid 1884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1883] <... futex resumed>) = 1 [pid 1881] <... futex resumed>) = 0 [pid 1875] <... ioctl resumed>) = 0 [pid 1873] ioctl(7, LOOP_CLR_FD [pid 1892] <... open resumed>) = 4 [pid 1890] <... mmap resumed>) = 0x7f6f98bca000 [pid 1884] <... futex resumed>) = 0 [pid 1892] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1889] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1883] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1875] close(7 [pid 1873] <... ioctl resumed>) = 0 [pid 1886] <... ioctl resumed>) = 0 [pid 1886] close(3) = 0 [pid 1886] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1886] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1882] <... close resumed>) = 0 [pid 1889] <... futex resumed>) = 1 [pid 1884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1878] <... futex resumed>) = 0 [pid 1892] <... futex resumed>) = 0 [pid 1873] close(7 [pid 1892] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1889] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1884] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1878] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1889] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] <... futex resumed>) = 0 [pid 1873] <... close resumed>) = 0 [pid 1892] <... futex resumed>) = 0 [pid 1889] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1884] <... futex resumed>) = 1 [pid 1878] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1892] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1889] <... mount resumed>) = 0 [pid 1884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1873] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1890] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1875] <... close resumed>) = 0 [pid 1892] <... mount resumed>) = 0 [pid 1892] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1889] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1873] <... futex resumed>) = 0 [pid 1892] <... futex resumed>) = 1 [pid 1889] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1884] <... futex resumed>) = 0 [pid 1878] <... futex resumed>) = 0 [pid 1892] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1873] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1892] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1889] <... futex resumed>) = 0 [pid 1884] <... futex resumed>) = 0 [pid 1878] <... futex resumed>) = 1 [pid 1892] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1889] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1878] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1892] <... open resumed>) = 5 [pid 1870] exit_group(0 [pid 1892] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1889] <... open resumed>) = 3 [pid 1889] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1892] <... futex resumed>) = 1 [pid 1889] <... futex resumed>) = 1 [pid 1884] <... futex resumed>) = 0 [pid 1878] <... futex resumed>) = 0 [pid 1892] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1889] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1892] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1889] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1884] <... futex resumed>) = 0 [pid 1892] openat(-1, "/proc/self/exe", O_RDONLY [pid 1889] openat(-1, "/proc/self/exe", O_RDONLY [pid 1884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1878] <... futex resumed>) = 0 [pid 1892] <... openat resumed>) = 6 [pid 1889] <... openat resumed>) = 6 [pid 1878] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1876] <... futex resumed>) = ? [pid 1873] <... futex resumed>) = ? [pid 1870] <... exit_group resumed>) = ? [pid 1892] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1889] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1876] +++ exited with 0 +++ [pid 1878] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1892] <... futex resumed>) = 1 [pid 1889] <... futex resumed>) = 0 [pid 1884] <... futex resumed>) = 0 [pid 1878] <... futex resumed>) = 0 [pid 1873] +++ exited with 0 +++ [pid 1870] +++ exited with 0 +++ [pid 1892] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1889] sendfile(3, 6, NULL, 140737974943952 [pid 1884] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1875] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1870, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 1892] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1884] <... futex resumed>) = 0 [pid 1875] <... futex resumed>) = 0 [pid 1874] exit_group(0 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1892] sendfile(5, 6, NULL, 140737974943952 [pid 1890] <... write resumed>) = 1048576 [pid 1884] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1877] <... futex resumed>) = ? [pid 1874] <... exit_group resumed>) = ? [pid 408] <... restart_syscall resumed>) = 0 [pid 1882] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1877] +++ exited with 0 +++ [pid 1881] exit_group(0 [pid 1883] <... futex resumed>) = ? [pid 1881] <... exit_group resumed>) = ? [pid 1883] +++ exited with 0 +++ [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 408] close(3) = 0 [pid 1882] <... futex resumed>) = ? [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1893 attached , child_tidptr=0x5555564066d0) = 1893 [pid 1893] set_robust_list(0x5555564066e0, 24) = 0 [pid 1893] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1893] setpgid(0, 0) = 0 [pid 1893] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1893] write(3, "1000", 4) = 4 [pid 1893] close(3) = 0 [pid 1893] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1893] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1893] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1893] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1894], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1894 [pid 1893] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1893] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1893] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1893] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1893] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1895], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1895 [pid 1893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1894 attached [pid 1894] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1890] munmap(0x7f6f98bca000, 1048576 [pid 1889] <... sendfile resumed>) = 1048576 [pid 1894] memfd_create("syzkaller", 0) = 3 [pid 1894] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1889] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1894] <... mmap resumed>) = 0x7f6f98bca000 [pid 1889] <... futex resumed>) = 1 [pid 1878] <... futex resumed>) = 0 [pid 1889] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1890] <... munmap resumed>) = 0 [pid 1890] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1892] <... sendfile resumed>) = 1048576 [pid 1892] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1884] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1895 attached [pid 1890] <... openat resumed>) = 7 [pid 1892] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1890] ioctl(7, LOOP_SET_FD, 3 [pid 1867] +++ exited with 0 +++ [pid 1861] +++ exited with 0 +++ [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1861, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 410] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 410] close(3) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1896 ./strace-static-x86_64: Process 1896 attached [pid 1896] set_robust_list(0x5555564066e0, 24) = 0 [pid 1896] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1896] setpgid(0, 0) = 0 [pid 1896] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1890] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1890] ioctl(7, LOOP_CLR_FD [pid 1896] <... openat resumed>) = 3 [pid 1896] write(3, "1000", 4) = 4 [pid 1896] close(3) = 0 [pid 1896] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1896] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1896] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1890] <... ioctl resumed>) = 0 [pid 1896] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1897], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1897 [pid 1896] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1896] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1896] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1896] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1896] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1890] ioctl(7, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1890] close(7) = 0 [pid 1896] <... clone resumed>, parent_tid=[1898], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1898 [pid 1890] close(3 [pid 1896] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1896] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1897 attached [pid 1897] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1897] memfd_create("syzkaller", 0) = 3 [pid 1897] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1890] <... close resumed>) = 0 [pid 1890] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1884] exit_group(0 [pid 1892] <... futex resumed>) = ? [pid 1884] <... exit_group resumed>) = ? [pid 1892] +++ exited with 0 +++ [pid 1890] <... futex resumed>) = ? [pid 1890] +++ exited with 0 +++ [pid 1884] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1884, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1900 [pid 1895] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1895] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1895] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1893] <... futex resumed>) = 0 [pid 1893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1895] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1895] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1893] <... futex resumed>) = 0 [pid 1893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 32.056156][ T1875] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 32.059352][ T1886] loop0: detected capacity change from 0 to 2048 [pid 1895] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1900 attached ./strace-static-x86_64: Process 1898 attached [pid 1894] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1882] +++ exited with 0 +++ [pid 1881] +++ exited with 0 +++ [pid 1875] +++ exited with 0 +++ [pid 1874] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1874, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1881, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 411] <... openat resumed>) = 3 [pid 409] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD [pid 409] ioctl(3, LOOP_CLR_FD [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] <... ioctl resumed>) = 0 [pid 411] close(3 [pid 409] close(3 [pid 411] <... close resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1902 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1903 [pid 1897] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1903 attached [pid 1903] set_robust_list(0x5555564066e0, 24) = 0 [pid 1903] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1895] <... open resumed>) = 5 [pid 1903] <... prctl resumed>) = 0 [pid 1895] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1903] setpgid(0, 0) = 0 [pid 1903] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1903] write(3, "1000", 4) = 4 [pid 1903] close(3) = 0 [pid 1903] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1903] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1903] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1903] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1904], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1904 [pid 1903] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1903] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1903] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1903] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1903] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1905], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1905 [pid 1903] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1903] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1897] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1902 attached [pid 1902] set_robust_list(0x5555564066e0, 24 [pid 1897] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1902] <... set_robust_list resumed>) = 0 [pid 1902] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1902] setpgid(0, 0) = 0 [pid 1897] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1902] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1897] <... openat resumed>) = 4 [pid 1897] ioctl(4, LOOP_SET_FD, 3 [pid 1900] set_robust_list(0x5555564066e0, 24 [pid 1898] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1895] <... futex resumed>) = 1 [pid 1894] <... write resumed>) = 1048576 [pid 1893] <... futex resumed>) = 0 [pid 1895] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1895] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1893] <... futex resumed>) = 0 [pid 1898] <... set_robust_list resumed>) = 0 [pid 1902] <... openat resumed>) = 3 [pid 1893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1898] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1895] openat(-1, "/proc/self/exe", O_RDONLY [pid 1902] write(3, "1000", 4) = 4 [pid 1902] close(3) = 0 [pid 1902] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1902] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1902] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1895] <... openat resumed>) = 6 [pid 1902] <... mprotect resumed>) = 0 [pid 1902] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1898] <... open resumed>) = 5 [pid 1895] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1900] <... set_robust_list resumed>) = 0 [pid 1894] munmap(0x7f6f98bca000, 1048576 [pid 1902] <... clone resumed>, parent_tid=[1906], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1906 [pid 1902] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1902] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1902] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1902] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1898] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1895] <... futex resumed>) = 1 [pid 1893] <... futex resumed>) = 0 [pid 1902] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1895] sendfile(5, 6, NULL, 140737974943952 [pid 1894] <... munmap resumed>) = 0 [pid 1898] <... futex resumed>) = 1 [pid 1896] <... futex resumed>) = 0 [pid 1893] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1896] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1896] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1893] <... futex resumed>) = 0 [pid 1902] <... clone resumed>, parent_tid=[1907], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1907 [pid 1895] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1893] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1898] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1894] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1902] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1902] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1895] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1905 attached [pid 1898] <... mount resumed>) = 0 [pid 1895] <... futex resumed>) = 1 [pid 1893] <... futex resumed>) = 0 [pid 1898] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1895] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1894] <... openat resumed>) = 7 [pid 1900] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1898] <... futex resumed>) = 1 [pid 1900] <... prctl resumed>) = 0 [pid 1896] <... futex resumed>) = 0 [pid 1894] ioctl(7, LOOP_SET_FD, 3 [pid 1896] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1898] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1896] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1905] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1905] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 1904 attached [pid 1904] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1904] memfd_create("syzkaller", 0) = 4 [pid 1904] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 1906 attached [pid 1906] set_robust_list(0x7f6fa100b9e0, 24) = 0 ./strace-static-x86_64: Process 1907 attached [pid 1906] memfd_create("syzkaller", 0 [pid 1907] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1907] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1906] <... memfd_create resumed>) = 4 [pid 1906] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1900] setpgid(0, 0 [pid 1894] <... ioctl resumed>) = 0 [pid 1904] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1906] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1900] <... setpgid resumed>) = 0 [pid 1900] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1907] <... open resumed>) = 3 [pid 1905] <... open resumed>) = 3 [pid 1898] <... open resumed>) = 6 [pid 1907] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1905] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1898] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1907] <... futex resumed>) = 1 [pid 1905] <... futex resumed>) = 1 [pid 1903] <... futex resumed>) = 0 [pid 1902] <... futex resumed>) = 0 [pid 1898] <... futex resumed>) = 1 [pid 1896] <... futex resumed>) = 0 [pid 1907] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1905] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1903] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1902] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1898] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1896] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1907] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1905] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1903] <... futex resumed>) = 0 [pid 1902] <... futex resumed>) = 0 [pid 1898] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1896] <... futex resumed>) = 0 [pid 1907] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1905] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1903] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1902] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1898] openat(-1, "/proc/self/exe", O_RDONLY [pid 1896] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1907] <... mount resumed>) = 0 [pid 1905] <... mount resumed>) = 0 [pid 1898] <... openat resumed>) = 7 [pid 1907] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1905] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1900] write(3, "1000", 4 [pid 1898] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1907] <... futex resumed>) = 1 [pid 1905] <... futex resumed>) = 1 [pid 1903] <... futex resumed>) = 0 [pid 1902] <... futex resumed>) = 0 [pid 1898] <... futex resumed>) = 1 [pid 1896] <... futex resumed>) = 0 [pid 1900] <... write resumed>) = 4 [pid 1907] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1905] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1903] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1902] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1898] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1897] <... ioctl resumed>) = 0 [pid 1896] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1907] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1905] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1903] <... futex resumed>) = 0 [pid 1902] <... futex resumed>) = 0 [pid 1900] close(3 [pid 1898] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1897] close(3 [pid 1896] <... futex resumed>) = 0 [pid 1894] close(3 [pid 1907] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1905] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1903] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1902] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1898] sendfile(6, 7, NULL, 140737974943952 [pid 1897] <... close resumed>) = 0 [pid 1896] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1907] <... open resumed>) = 5 [pid 1905] <... open resumed>) = 5 [pid 1900] <... close resumed>) = 0 [pid 1897] mkdir("./bus", 0777 [pid 1894] <... close resumed>) = 0 [pid 1907] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1905] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1900] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1897] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1894] mkdir("./bus", 0777 [pid 1907] <... futex resumed>) = 1 [pid 1905] <... futex resumed>) = 1 [pid 1903] <... futex resumed>) = 0 [pid 1902] <... futex resumed>) = 0 [pid 1900] <... futex resumed>) = 0 [pid 1897] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1894] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1907] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1905] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1904] <... write resumed>) = 1048576 [pid 1903] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1902] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1900] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1894] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1886] <... mount resumed>) = -1 ENOTDIR (Not a directory) [ 32.127088][ T1886] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 32.131352][ T1897] loop3: detected capacity change from 0 to 2048 [ 32.148608][ T1894] loop1: detected capacity change from 0 to 2048 [pid 1907] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1906] <... write resumed>) = 1048576 [pid 1905] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1904] munmap(0x7f6f98bca000, 1048576 [pid 1903] <... futex resumed>) = 0 [pid 1902] <... futex resumed>) = 0 [pid 1900] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1898] <... sendfile resumed>) = 1048576 [pid 1886] ioctl(4, LOOP_CLR_FD [pid 1907] openat(-1, "/proc/self/exe", O_RDONLY [pid 1905] openat(-1, "/proc/self/exe", O_RDONLY [pid 1903] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1902] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1898] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1907] <... openat resumed>) = 6 [pid 1906] munmap(0x7f6f98bca000, 1048576 [pid 1905] <... openat resumed>) = 6 [pid 1898] <... futex resumed>) = 1 [pid 1896] <... futex resumed>) = 0 [pid 1907] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1906] <... munmap resumed>) = 0 [pid 1905] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1900] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1898] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1907] <... futex resumed>) = 1 [pid 1906] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1905] <... futex resumed>) = 1 [pid 1903] <... futex resumed>) = 0 [pid 1902] <... futex resumed>) = 0 [pid 1907] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1906] <... openat resumed>) = 7 [pid 1905] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1903] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1902] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1907] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1906] ioctl(7, LOOP_SET_FD, 4 [pid 1905] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1903] <... futex resumed>) = 0 [pid 1902] <... futex resumed>) = 0 [pid 1907] sendfile(5, 6, NULL, 140737974943952 [pid 1905] sendfile(5, 6, NULL, 140737974943952 [pid 1904] <... munmap resumed>) = 0 [pid 1900] <... mprotect resumed>) = 0 [pid 1897] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1904] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1900] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1897] ioctl(4, LOOP_CLR_FD [pid 1904] <... openat resumed>) = 7 [pid 1897] <... ioctl resumed>) = 0 [pid 1904] ioctl(7, LOOP_SET_FD, 4 [pid 1900] <... clone resumed>, parent_tid=[1908], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1908 [pid 1897] close(4 [pid 1904] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1900] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1897] <... close resumed>) = 0 [pid 1904] ioctl(7, LOOP_CLR_FD [pid 1900] <... futex resumed>) = 0 [pid 1897] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1904] <... ioctl resumed>) = 0 [pid 1900] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1897] <... futex resumed>) = 0 [pid 1900] <... futex resumed>) = 0 [pid 1897] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1900] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1903] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1902] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1900] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1900] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1896] exit_group(0 [pid 1904] ioctl(7, LOOP_SET_FD, 4 [pid 1900] <... mprotect resumed>) = 0 [pid 1904] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1900] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1898] <... futex resumed>) = ? [pid 1897] <... futex resumed>) = ? [pid 1896] <... exit_group resumed>) = ? [pid 1904] close(7 [pid 1898] +++ exited with 0 +++ [pid 1897] +++ exited with 0 +++ [pid 1904] <... close resumed>) = 0 [pid 1900] <... clone resumed>, parent_tid=[1909], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1909 [pid 1896] +++ exited with 0 +++ [pid 1904] close(4 [pid 1900] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1904] <... close resumed>) = 0 [pid 1900] <... futex resumed>) = 0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1896, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1905] <... sendfile resumed>) = 1048576 [pid 1904] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1900] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 1909 attached ./strace-static-x86_64: Process 1908 attached [pid 1907] <... sendfile resumed>) = 1048576 [pid 1906] <... ioctl resumed>) = 0 [pid 1905] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1904] <... futex resumed>) = 0 [pid 410] <... restart_syscall resumed>) = 0 [pid 1909] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1908] set_robust_list(0x7f6fa100b9e0, 24 [pid 1907] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1906] close(4 [pid 1905] <... futex resumed>) = 1 [pid 1903] <... futex resumed>) = 0 [pid 1909] <... set_robust_list resumed>) = 0 [pid 1908] <... set_robust_list resumed>) = 0 [pid 1907] <... futex resumed>) = 1 [pid 1906] <... close resumed>) = 0 [pid 1905] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1903] exit_group(0 [pid 1902] <... futex resumed>) = 0 [pid 1909] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1908] memfd_create("syzkaller", 0 [pid 1907] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1906] mkdir("./bus", 0777 [pid 1905] <... futex resumed>) = ? [pid 1903] <... exit_group resumed>) = ? [pid 1886] <... ioctl resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1909] <... open resumed>) = 3 [pid 1908] <... memfd_create resumed>) = 4 [pid 1906] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1905] +++ exited with 0 +++ [pid 410] <... openat resumed>) = 3 [pid 1909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1908] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1906] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 410] ioctl(3, LOOP_CLR_FD [pid 1909] <... futex resumed>) = 1 [pid 1908] <... mmap resumed>) = 0x7f6f98bca000 [pid 1900] <... futex resumed>) = 0 [pid 410] <... ioctl resumed>) = 0 [pid 1909] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1908] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1904] +++ exited with 0 +++ [pid 1903] +++ exited with 0 +++ [pid 1900] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1886] close(4 [pid 410] close(3 [pid 1909] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1908] <... write resumed>) = 1048576 [pid 1900] <... futex resumed>) = 0 [pid 1886] <... close resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1903, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1909] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1908] munmap(0x7f6f98bca000, 1048576 [pid 1900] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1886] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1878] exit_group(0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 1909] <... mount resumed>) = 0 [pid 1908] <... munmap resumed>) = 0 [pid 1889] <... futex resumed>) = ? [pid 1886] <... futex resumed>) = ? [pid 1878] <... exit_group resumed>) = ? [pid 409] <... restart_syscall resumed>) = 0 [pid 1909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1908] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1889] +++ exited with 0 +++ [pid 1886] +++ exited with 0 +++ [pid 1878] +++ exited with 0 +++ [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1912 [pid 1909] <... futex resumed>) = 1 [pid 1908] <... openat resumed>) = 5 [pid 1900] <... futex resumed>) = 0 [pid 1909] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1908] ioctl(5, LOOP_SET_FD, 4 [pid 1900] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1909] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1908] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1900] <... futex resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1878, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1909] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1908] ioctl(5, LOOP_CLR_FD [pid 1900] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] ioctl(3, LOOP_CLR_FD [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1909] <... open resumed>) = 6 [pid 1908] <... ioctl resumed>) = 0 [pid 409] <... ioctl resumed>) = 0 [pid 407] <... restart_syscall resumed>) = 0 [pid 1909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] close(3 [pid 1909] <... futex resumed>) = 1 [pid 1900] <... futex resumed>) = 0 [pid 409] <... close resumed>) = 0 [pid 1909] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1900] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1909] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1900] <... futex resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1909] openat(-1, "/proc/self/exe", O_RDONLY [pid 1900] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1914 [pid 407] <... openat resumed>) = 3 [pid 1909] <... openat resumed>) = 7 [pid 1908] ioctl(5, LOOP_SET_FD, 4 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1908] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1909] <... futex resumed>) = 1 [pid 1908] close(5 [pid 1900] <... futex resumed>) = 0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) ./strace-static-x86_64: Process 1912 attached [pid 1909] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1908] <... close resumed>) = 0 [pid 1900] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] close(3 [pid 1912] set_robust_list(0x5555564066e0, 24 [pid 1909] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1908] close(4 [pid 1900] <... futex resumed>) = 0 [pid 1894] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1912] <... set_robust_list resumed>) = 0 [pid 1909] sendfile(6, 7, NULL, 140737974943952 [pid 1908] <... close resumed>) = 0 [pid 1900] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] <... close resumed>) = 0 [pid 1912] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1908] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1894] ioctl(7, LOOP_CLR_FD [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1912] <... prctl resumed>) = 0 [pid 1908] <... futex resumed>) = 0 [pid 1912] setpgid(0, 0 [pid 1908] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1912] <... setpgid resumed>) = 0 [pid 1912] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1894] <... ioctl resumed>) = 0 [pid 1912] <... openat resumed>) = 3 [pid 1912] write(3, "1000", 4 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1916 [pid 1912] <... write resumed>) = 4 [pid 1912] close(3 [pid 1894] close(7 [pid 1912] <... close resumed>) = 0 [pid 1894] <... close resumed>) = 0 [pid 1912] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1894] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1912] <... futex resumed>) = 0 [pid 1912] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1894] <... futex resumed>) = 0 [pid 1912] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1894] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1912] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1893] exit_group(0 [pid 1912] <... clone resumed>, parent_tid=[1917], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1917 [pid 1893] <... exit_group resumed>) = ? [pid 1912] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1895] <... futex resumed>) = ? [pid 1912] <... futex resumed>) = 0 [pid 1895] +++ exited with 0 +++ [pid 1894] <... futex resumed>) = ? [pid 1912] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1912] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1912] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1912] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1918], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1918 [pid 1912] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1909] <... sendfile resumed>) = 1048576 [pid 1894] +++ exited with 0 +++ [pid 1893] +++ exited with 0 +++ [pid 1912] <... futex resumed>) = 0 [pid 1909] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1912] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1909] <... futex resumed>) = 1 [pid 1900] <... futex resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1893, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1909] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1900] exit_group(0 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 1909] <... futex resumed>) = ? [pid 1908] <... futex resumed>) = ? [pid 1900] <... exit_group resumed>) = ? [pid 1909] +++ exited with 0 +++ [pid 1908] +++ exited with 0 +++ [ 32.171727][ T1897] EXT4-fs (loop3): VFS: Can't find ext4 filesystem [ 32.184040][ T1906] loop4: detected capacity change from 0 to 2048 [ 32.200807][ T1894] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 408] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 1918 attached ./strace-static-x86_64: Process 1916 attached ./strace-static-x86_64: Process 1914 attached [pid 1900] +++ exited with 0 +++ ./strace-static-x86_64: Process 1917 attached [pid 1917] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1917] memfd_create("syzkaller", 0) = 3 [pid 1917] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1900, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 408] <... openat resumed>) = 3 [pid 412] <... openat resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 408] ioctl(3, LOOP_CLR_FD [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 412] close(3 [pid 408] close(3 [pid 412] <... close resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] <... close resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1919 [pid 1917] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1920 [pid 1918] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1916] set_robust_list(0x5555564066e0, 24 [pid 1914] set_robust_list(0x5555564066e0, 24 [pid 1918] <... set_robust_list resumed>) = 0 [pid 1916] <... set_robust_list resumed>) = 0 [pid 1914] <... set_robust_list resumed>) = 0 [pid 1918] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1916] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1914] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1918] <... open resumed>) = 4 [pid 1916] <... prctl resumed>) = 0 [pid 1914] <... prctl resumed>) = 0 [pid 1916] setpgid(0, 0 [pid 1914] setpgid(0, 0 [pid 1916] <... setpgid resumed>) = 0 [pid 1918] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1914] <... setpgid resumed>) = 0 [pid 1916] <... openat resumed>) = 3 [pid 1914] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1918] <... futex resumed>) = 1 [pid 1912] <... futex resumed>) = 0 [pid 1912] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1912] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1914] <... openat resumed>) = 3 [pid 1918] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1916] write(3, "1000", 4 [pid 1914] write(3, "1000", 4./strace-static-x86_64: Process 1920 attached ./strace-static-x86_64: Process 1919 attached [pid 1918] <... mount resumed>) = 0 [pid 1916] <... write resumed>) = 4 [pid 1914] <... write resumed>) = 4 [pid 1918] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] close(3 [pid 1914] close(3) = 0 [pid 1916] <... close resumed>) = 0 [pid 1918] <... futex resumed>) = 1 [pid 1912] <... futex resumed>) = 0 [pid 1912] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1912] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1920] set_robust_list(0x5555564066e0, 24 [pid 1919] set_robust_list(0x5555564066e0, 24 [pid 1918] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1916] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1906] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1920] <... set_robust_list resumed>) = 0 [pid 1919] <... set_robust_list resumed>) = 0 [pid 1918] <... open resumed>) = 5 [pid 1916] <... futex resumed>) = 0 [pid 1914] <... futex resumed>) = 0 [pid 1906] ioctl(7, LOOP_CLR_FD [pid 1918] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1914] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1918] <... futex resumed>) = 1 [pid 1916] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1914] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1912] <... futex resumed>) = 0 [pid 1912] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1912] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1919] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1918] openat(-1, "/proc/self/exe", O_RDONLY [pid 1920] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1916] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1914] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1920] <... prctl resumed>) = 0 [pid 1919] <... prctl resumed>) = 0 [pid 1918] <... openat resumed>) = 6 [pid 1917] <... write resumed>) = 1048576 [pid 1916] <... mprotect resumed>) = 0 [pid 1914] <... mprotect resumed>) = 0 [pid 1919] setpgid(0, 0 [pid 1918] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1914] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1920] setpgid(0, 0 [pid 1919] <... setpgid resumed>) = 0 [pid 1918] <... futex resumed>) = 1 [pid 1912] <... futex resumed>) = 0 [pid 1912] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1912] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1920] <... setpgid resumed>) = 0 [pid 1919] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1918] sendfile(5, 6, NULL, 140737974943952 [pid 1917] munmap(0x7f6f98bca000, 1048576./strace-static-x86_64: Process 1921 attached [pid 1921] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1921] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1922 attached [pid 1922] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1922] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1916] <... clone resumed>, parent_tid=[1922], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1922 [pid 1914] <... clone resumed>, parent_tid=[1921], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1921 [pid 1916] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1922] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1916] <... futex resumed>) = 0 [pid 1914] <... futex resumed>) = 1 [pid 1916] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1919] <... openat resumed>) = 3 [pid 1916] <... futex resumed>) = 0 [pid 1914] <... futex resumed>) = 0 [pid 1919] write(3, "1000", 4 [pid 1916] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1914] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1920] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1919] <... write resumed>) = 4 [pid 1916] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1914] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1919] close(3 [pid 1916] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1914] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1916] <... mprotect resumed>) = 0 [pid 1914] <... mprotect resumed>) = 0 [pid 1916] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1914] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1921] <... futex resumed>) = 0 [pid 1921] memfd_create("syzkaller", 0 [pid 1916] <... clone resumed>, parent_tid=[1923], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1923 [pid 1914] <... clone resumed>, parent_tid=[1924], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1924 [pid 1916] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1920] <... openat resumed>) = 3 [pid 1919] <... close resumed>) = 0 [pid 1916] <... futex resumed>) = 0 [pid 1914] <... futex resumed>) = 0 [pid 1920] write(3, "1000", 4 [pid 1919] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1919] <... futex resumed>) = 0 [pid 1914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1920] <... write resumed>) = 4 [pid 1919] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1921] <... memfd_create resumed>) = 3 [pid 1921] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1920] close(3 [pid 1919] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1918] <... sendfile resumed>) = 1048576 [pid 1918] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1912] <... futex resumed>) = 0 [pid 1918] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1921] <... mmap resumed>) = 0x7f6f98bca000 [pid 1920] <... close resumed>) = 0 [pid 1919] <... mprotect resumed>) = 0 [pid 1917] <... munmap resumed>) = 0 [pid 1922] memfd_create("syzkaller", 0) = 3 [pid 1922] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1920] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1919] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1917] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1920] <... futex resumed>) = 0 [pid 1917] <... openat resumed>) = 7 [pid 1920] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1919] <... clone resumed>, parent_tid=[1925], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1925 [pid 1917] ioctl(7, LOOP_SET_FD, 3./strace-static-x86_64: Process 1925 attached ./strace-static-x86_64: Process 1924 attached ./strace-static-x86_64: Process 1923 attached [pid 1922] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [ 32.257600][ T1906] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1921] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1920] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1919] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1917] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1924] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1923] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1925] set_robust_list(0x7f6fa100b9e0, 24 [pid 1924] <... set_robust_list resumed>) = 0 [pid 1923] <... set_robust_list resumed>) = 0 [pid 1920] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1919] <... futex resumed>) = 0 [pid 1917] ioctl(7, LOOP_CLR_FD [pid 1920] <... mprotect resumed>) = 0 [pid 1919] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1917] <... ioctl resumed>) = 0 [pid 1919] <... futex resumed>) = 0 [pid 1925] <... set_robust_list resumed>) = 0 [pid 1924] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1923] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1920] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1919] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1925] memfd_create("syzkaller", 0 [pid 1924] <... open resumed>) = 4 [pid 1923] <... open resumed>) = 4 [pid 1919] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1924] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1923] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1920] <... clone resumed>, parent_tid=[1926], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1926 [pid 1919] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1917] ioctl(7, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1919] <... mprotect resumed>) = 0 [pid 1920] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1919] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1917] close(7./strace-static-x86_64: Process 1926 attached [pid 1925] <... memfd_create resumed>) = 3 [pid 1924] <... futex resumed>) = 1 [pid 1923] <... futex resumed>) = 1 [pid 1922] <... write resumed>) = 1048576 [pid 1921] <... write resumed>) = 1048576 [pid 1920] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1917] <... close resumed>) = 0 [pid 1916] <... futex resumed>) = 0 [pid 1914] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1927 attached [pid 1926] set_robust_list(0x7f6fa100b9e0, 24 [pid 1925] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1926] <... set_robust_list resumed>) = 0 [pid 1926] memfd_create("syzkaller", 0 [pid 1927] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1927] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1926] <... memfd_create resumed>) = 3 [pid 1926] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [pid 1924] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1923] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1920] <... futex resumed>) = 0 [pid 1919] <... clone resumed>, parent_tid=[1927], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1927 [pid 1917] close(3 [pid 1916] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1926] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1925] <... mmap resumed>) = 0x7f6f98bca000 [pid 1924] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1923] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1922] munmap(0x7f6f98bca000, 1048576 [pid 1921] munmap(0x7f6f98bca000, 1048576 [pid 1920] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1906] <... ioctl resumed>) = 0 [pid 1906] close(7) = 0 [pid 1906] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1906] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1919] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] <... futex resumed>) = 0 [pid 1916] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1902] exit_group(0 [pid 1907] <... futex resumed>) = ? [pid 1906] <... futex resumed>) = ? [pid 1902] <... exit_group resumed>) = ? [pid 1927] <... futex resumed>) = 0 [pid 1924] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1923] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1920] <... mmap resumed>) = 0x7f6f98bca000 [pid 1919] <... futex resumed>) = 1 [pid 1917] <... close resumed>) = 0 [pid 1914] <... futex resumed>) = 0 [pid 1907] +++ exited with 0 +++ [pid 1906] +++ exited with 0 +++ [pid 1927] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1924] <... mount resumed>) = 0 [pid 1923] <... mount resumed>) = 0 [pid 1920] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1919] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1927] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1924] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1927] <... futex resumed>) = 0 [pid 1923] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1920] <... mprotect resumed>) = 0 [pid 1919] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1927] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1924] <... futex resumed>) = 0 [pid 1923] <... futex resumed>) = 1 [pid 1920] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1919] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1917] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] <... futex resumed>) = 0 [pid 1914] <... futex resumed>) = 0 [pid 1927] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1924] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1923] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1919] <... futex resumed>) = 0 [pid 1917] <... futex resumed>) = 0 [pid 1916] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1922] <... munmap resumed>) = 0 [pid 1927] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1925] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1924] <... open resumed>) = 5 [pid 1923] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1922] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1921] <... munmap resumed>) = 0 [pid 1920] <... clone resumed>, parent_tid=[1928], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1928 [pid 1919] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1917] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1916] <... futex resumed>) = 0 [pid 1912] exit_group(0 [pid 1927] <... mount resumed>) = 0 [pid 1924] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1923] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1922] <... openat resumed>) = 5 [pid 1921] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1920] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1918] <... futex resumed>) = ? [pid 1917] <... futex resumed>) = ? [pid 1916] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1912] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1928 attached [pid 1927] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1925] <... write resumed>) = 1048576 [pid 1924] <... futex resumed>) = 1 [pid 1923] <... open resumed>) = 6 [pid 1922] ioctl(5, LOOP_SET_FD, 3 [pid 1920] <... futex resumed>) = 0 [pid 1918] +++ exited with 0 +++ [pid 1917] +++ exited with 0 +++ [pid 1914] <... futex resumed>) = 0 [pid 1928] set_robust_list(0x7f6f98bea9e0, 24 [pid 1927] <... futex resumed>) = 1 [pid 1925] munmap(0x7f6f98bca000, 1048576 [pid 1924] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1923] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1921] <... openat resumed>) = 6 [pid 1920] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1919] <... futex resumed>) = 0 [pid 1914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1912] +++ exited with 0 +++ [pid 1902] +++ exited with 0 +++ [pid 1928] <... set_robust_list resumed>) = 0 [pid 1927] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1925] <... munmap resumed>) = 0 [pid 1924] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1923] <... futex resumed>) = 1 [pid 1921] ioctl(6, LOOP_SET_FD, 3 [pid 1919] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] <... futex resumed>) = 0 [pid 1914] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1902, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 1928] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1927] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1925] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1924] openat(-1, "/proc/self/exe", O_RDONLY [pid 1923] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1919] <... futex resumed>) = 0 [pid 1926] <... write resumed>) = 1048576 [pid 1916] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1912, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1928] <... open resumed>) = 4 [pid 1927] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1925] <... openat resumed>) = 5 [pid 1924] <... openat resumed>) = 7 [pid 1923] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1919] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1916] <... futex resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1928] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1925] ioctl(5, LOOP_SET_FD, 3 [pid 1924] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1923] openat(-1, "/proc/self/exe", O_RDONLY [pid 1927] <... open resumed>) = 6 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1928] <... futex resumed>) = 1 [pid 1926] munmap(0x7f6f98beb000, 1048576 [pid 1924] <... futex resumed>) = 1 [pid 1923] <... openat resumed>) = 7 [pid 1922] <... ioctl resumed>) = 0 [pid 1920] <... futex resumed>) = 0 [pid 1916] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1914] <... futex resumed>) = 0 [pid 411] <... openat resumed>) = 3 [pid 410] <... openat resumed>) = 3 [pid 1928] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1927] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1924] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1923] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1920] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1914] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] ioctl(3, LOOP_CLR_FD [pid 410] ioctl(3, LOOP_CLR_FD [pid 1928] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1927] <... futex resumed>) = 1 [pid 1924] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1923] <... futex resumed>) = 0 [pid 1920] <... futex resumed>) = 0 [pid 1919] <... futex resumed>) = 0 [pid 1916] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1914] <... futex resumed>) = 0 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 410] <... ioctl resumed>) = 0 [pid 1928] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1927] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1924] sendfile(5, 7, NULL, 140737974943952 [pid 1923] sendfile(6, 7, NULL, 140737974943952 [pid 1920] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1919] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1916] <... futex resumed>) = 0 [pid 1914] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] close(3 [pid 410] close(3 [pid 1928] <... mount resumed>) = 0 [pid 1927] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1923] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1919] <... futex resumed>) = 0 [pid 1916] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... close resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 1928] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1927] openat(-1, "/proc/self/exe", O_RDONLY [pid 1923] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1919] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1928] <... futex resumed>) = 1 [pid 1927] <... openat resumed>) = 7 [pid 1923] <... futex resumed>) = 0 [pid 1920] <... futex resumed>) = 0 [pid 1916] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1928] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1927] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1923] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1920] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1929 [pid 1928] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1927] <... futex resumed>) = 1 [pid 1920] <... futex resumed>) = 0 [pid 1919] <... futex resumed>) = 0 [pid 1928] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1927] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1920] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1919] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1928] <... open resumed>) = 5 [pid 1927] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1930 [pid 1928] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1927] sendfile(6, 7, NULL, 140737974943952 [pid 1919] <... futex resumed>) = 0 [pid 1928] <... futex resumed>) = 1 [pid 1920] <... futex resumed>) = 0 [pid 1928] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1927] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 1920] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1919] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1928] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1927] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1920] <... futex resumed>) = 0 [pid 1919] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1928] openat(-1, "/proc/self/exe", O_RDONLY [pid 1927] <... futex resumed>) = 0 [pid 1920] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1928] <... openat resumed>) = 6 [pid 1927] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1926] <... munmap resumed>) = 0 [pid 1928] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1920] <... futex resumed>) = 0 [pid 1928] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1920] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1928] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1920] <... futex resumed>) = 0 [pid 1928] sendfile(5, 6, NULL, 140737974943952 [pid 1920] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1928] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1928] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1924] <... sendfile resumed>) = 1048576 [pid 1928] <... futex resumed>) = 1 [pid 1925] <... ioctl resumed>) = 0 [pid 1924] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1920] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1929 attached [pid 1928] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1925] close(3 [pid 1924] <... futex resumed>) = 1 [pid 1914] <... futex resumed>) = 0 [pid 1929] set_robust_list(0x5555564066e0, 24 [pid 1926] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1925] <... close resumed>) = 0 [pid 1924] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1929] <... set_robust_list resumed>) = 0 [pid 1925] mkdir("./bus", 0777 [pid 1929] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1926] <... openat resumed>) = 7 [pid 1925] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1929] <... prctl resumed>) = 0 [pid 1926] ioctl(7, LOOP_SET_FD, 3 [ 32.348826][ T1922] loop0: detected capacity change from 0 to 2048 [ 32.358135][ T1921] loop2: detected capacity change from 0 to 2048 [ 32.367198][ T1925] loop5: detected capacity change from 0 to 2048 [pid 1925] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1922] close(3 [pid 1929] setpgid(0, 0) = 0 [pid 1929] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1929] write(3, "1000", 4) = 4 [pid 1929] close(3) = 0 [pid 1929] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1929] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1929] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1929] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1931], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1931 [pid 1929] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1929] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1929] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1929] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1929] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1932], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1932 [pid 1929] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1929] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1931 attached [pid 1931] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1931] memfd_create("syzkaller", 0) = 3 [pid 1931] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1922] <... close resumed>) = 0 [pid 1921] <... ioctl resumed>) = 0 [pid 1922] mkdir("./bus", 0777 [pid 1921] close(3./strace-static-x86_64: Process 1930 attached [pid 1922] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1921] <... close resumed>) = 0 [pid 1922] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1921] mkdir("./bus", 0777 [pid 1930] set_robust_list(0x5555564066e0, 24 [pid 1921] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1931] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1931] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1921] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1930] <... set_robust_list resumed>) = 0 [pid 1931] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 1931] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 1932 attached [pid 1930] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1932] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1930] <... prctl resumed>) = 0 [pid 1932] <... set_robust_list resumed>) = 0 [pid 1931] <... ioctl resumed>) = 0 [pid 1930] setpgid(0, 0 [pid 1926] <... ioctl resumed>) = 0 [pid 1922] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1932] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1930] <... setpgid resumed>) = 0 [pid 1926] close(3 [pid 1922] ioctl(5, LOOP_CLR_FD [pid 1932] <... open resumed>) = 5 [pid 1930] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1926] <... close resumed>) = 0 [pid 1922] <... ioctl resumed>) = 0 [pid 1932] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1930] <... openat resumed>) = 3 [ 32.389550][ T1926] loop1: detected capacity change from 0 to 2048 [ 32.399520][ T1922] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [ 32.408530][ T1931] loop4: detected capacity change from 0 to 2048 [ 32.418128][ T1925] EXT4-fs mount: 105 callbacks suppressed [ 32.418143][ T1925] EXT4-fs (loop5): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 1926] mkdir("./bus", 0777 [pid 1922] close(5 [pid 1932] <... futex resumed>) = 1 [pid 1931] close(3 [pid 1930] write(3, "1000", 4 [pid 1929] <... futex resumed>) = 0 [pid 1926] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1922] <... close resumed>) = 0 [pid 1929] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1929] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1931] <... close resumed>) = 0 [pid 1931] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1931] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1926] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1922] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1932] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1930] <... write resumed>) = 4 [pid 1932] <... mount resumed>) = 0 [pid 1930] close(3 [pid 1922] <... futex resumed>) = 0 [pid 1932] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1930] <... close resumed>) = 0 [pid 1922] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1916] exit_group(0) = ? [pid 1923] <... futex resumed>) = ? [pid 1923] +++ exited with 0 +++ [pid 1922] <... futex resumed>) = 230 [pid 1932] <... futex resumed>) = 1 [pid 1930] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1929] <... futex resumed>) = 0 [pid 1929] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1930] <... futex resumed>) = 0 [pid 1922] +++ exited with 0 +++ [pid 1916] +++ exited with 0 +++ [pid 1929] <... futex resumed>) = 0 [pid 1929] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1916, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1932] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1930] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 1932] <... open resumed>) = 3 [pid 1930] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1932] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1930] <... mprotect resumed>) = 0 [pid 407] <... restart_syscall resumed>) = 0 [pid 1930] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1932] <... futex resumed>) = 1 [pid 1929] <... futex resumed>) = 0 [pid 1932] openat(-1, "/proc/self/exe", O_RDONLY [pid 1929] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1932] <... openat resumed>) = 6 [pid 1930] <... clone resumed>, parent_tid=[1937], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1937 [pid 1929] <... futex resumed>) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1932] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1930] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1929] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1932] <... futex resumed>) = 0 [pid 1930] <... futex resumed>) = 0 [pid 1929] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 407] <... openat resumed>) = 3 [pid 1929] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1930] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1932] sendfile(3, 6, NULL, 140737974943952 [pid 407] <... ioctl resumed>) = 0 [pid 407] close(3 [pid 1929] <... futex resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1930] <... futex resumed>) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 1938 [pid 1929] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1930] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [ 32.442290][ T1925] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 32.442736][ T1921] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 32.472246][ T1921] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 32.482433][ T1931] EXT4-fs warning (device loop4): read_mmp_block:107: Error -117 while reading MMP block 64 [pid 1930] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 1938 attached ./strace-static-x86_64: Process 1937 attached ) = 0 [pid 1932] <... sendfile resumed>) = 1048576 [pid 1931] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 1931] ioctl(4, LOOP_CLR_FD) = 0 [pid 1931] close(4) = 0 [pid 1931] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1931] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1930] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1941], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1941 [pid 1930] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1932] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1930] <... futex resumed>) = 0 [pid 1937] set_robust_list(0x7f6fa100b9e0, 24 [pid 1930] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1932] <... futex resumed>) = 1 [pid 1929] <... futex resumed>) = 0 [pid 1937] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 1941 attached [pid 1929] exit_group(0 [pid 1941] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1937] memfd_create("syzkaller", 0 [pid 1929] <... exit_group resumed>) = ? [pid 1932] memfd_create("syzkaller", 0) = ? [pid 1932] +++ exited with 0 +++ [pid 1931] <... futex resumed>) = ? [pid 1937] <... memfd_create resumed>) = 3 [pid 1925] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1941] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1937] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1925] ioctl(5, LOOP_CLR_FD [pid 1937] <... mmap resumed>) = 0x7f6f98bca000 [pid 1925] <... ioctl resumed>) = 0 [pid 1938] set_robust_list(0x5555564066e0, 24) = 0 [pid 1938] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1938] setpgid(0, 0) = 0 [pid 1938] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1938] write(3, "1000", 4) = 4 [pid 1938] close(3) = 0 [pid 1938] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1938] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1938] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1938] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1942], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1942 [pid 1938] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1938] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1938] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1938] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1938] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1943], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1943 [pid 1938] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1938] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1942 attached [pid 1942] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1942] memfd_create("syzkaller", 0) = 3 [pid 1942] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1937] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1925] close(5) = 0 [pid 1925] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1925] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1919] exit_group(0 [pid 1927] <... futex resumed>) = ? [pid 1919] <... exit_group resumed>) = ? [pid 1925] <... futex resumed>) = -1 (errno 18446744073709551555) [pid 1927] +++ exited with 0 +++ [pid 1925] +++ exited with 0 +++ [pid 1919] +++ exited with 0 +++ [pid 1942] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1937] <... write resumed>) = 1048576 [pid 1937] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1937] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 5 [pid 1937] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1921] <... mount resumed>) = -1 ENOTDIR (Not a directory) ./strace-static-x86_64: Process 1943 attached [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1919, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1937] ioctl(5, LOOP_CLR_FD [pid 1921] ioctl(6, LOOP_CLR_FD [pid 1937] <... ioctl resumed>) = 0 [pid 1943] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 1943] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3 [pid 1937] ioctl(5, LOOP_SET_FD, 3 [pid 412] <... close resumed>) = 0 [pid 1937] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1937] close(5) = 0 [pid 1942] <... write resumed>) = 1048576 [pid 1937] close(3 [pid 1942] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1942] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 1942] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1942] ioctl(5, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 1944 attached [pid 1944] set_robust_list(0x5555564066e0, 24) = 0 [pid 1944] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1944] setpgid(0, 0) = 0 [pid 1944] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1944] write(3, "1000", 4) = 4 [pid 1944] close(3) = 0 [pid 1944] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1944] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1942] ioctl(5, LOOP_SET_FD, 3 [pid 1937] <... close resumed>) = 0 [pid 1942] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1942] close(5) = 0 [pid 1937] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1944 [pid 1942] close(3) = 0 [pid 1944] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1944] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1942] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1942] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1944] <... clone resumed>, parent_tid=[1945], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1945 [pid 1944] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1944] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1944] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1944] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1944] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1946], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1946 [pid 1944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1946 attached [pid 1946] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1946] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1937] <... futex resumed>) = 0 [pid 1937] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1945 attached [pid 1945] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1945] memfd_create("syzkaller", 0) = 4 [pid 1945] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1931] +++ exited with 0 +++ [pid 1929] +++ exited with 0 +++ [pid 1941] <... open resumed>) = 4 [pid 1941] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1929, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1941] <... futex resumed>) = 1 [pid 1930] <... futex resumed>) = 0 [pid 1941] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1930] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1937] <... futex resumed>) = 0 [pid 1930] <... futex resumed>) = 1 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1937] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1930] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... openat resumed>) = 3 [pid 1937] <... mount resumed>) = 0 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1937] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1937] <... futex resumed>) = 1 [pid 1930] <... futex resumed>) = 0 [pid 411] close(3 [pid 1937] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1930] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] <... close resumed>) = 0 [pid 1937] <... open resumed>) = 3 [pid 1930] <... futex resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1937] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1930] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1937] <... futex resumed>) = 0 [pid 1930] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1947 [pid 1937] openat(-1, "/proc/self/exe", O_RDONLY [pid 1930] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1937] <... openat resumed>) = 5 [pid 1930] <... futex resumed>) = 0 [pid 1937] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1930] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1937] <... futex resumed>) = 0 [pid 1930] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1937] sendfile(3, 5, NULL, 140737974943952 [pid 1930] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1930] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1943] <... open resumed>) = 4 [pid 1945] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1943] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1938] <... futex resumed>) = 0 [pid 1921] <... ioctl resumed>) = 0 [pid 1943] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1938] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1942] <... futex resumed>) = 0 [pid 1938] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1942] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1942] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1938] <... futex resumed>) = 0 [pid 1942] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1938] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1942] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1942] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1938] <... futex resumed>) = 0 [pid 1942] <... open resumed>) = 3 [pid 1938] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1942] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1938] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1942] <... futex resumed>) = 0 [pid 1938] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1947 attached [pid 1946] <... open resumed>) = 3 [pid 1942] openat(-1, "/proc/self/exe", O_RDONLY [pid 1938] <... futex resumed>) = 0 [pid 1937] <... sendfile resumed>) = 1048576 [pid 1926] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1921] close(6 [pid 1947] set_robust_list(0x5555564066e0, 24 [pid 1946] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1942] <... openat resumed>) = 5 [pid 1938] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1937] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1926] ioctl(7, LOOP_CLR_FD [pid 1921] <... close resumed>) = 0 [pid 1947] <... set_robust_list resumed>) = 0 [pid 1946] <... futex resumed>) = 1 [pid 1944] <... futex resumed>) = 0 [pid 1942] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1938] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1937] <... futex resumed>) = 1 [pid 1930] <... futex resumed>) = 0 [pid 1926] <... ioctl resumed>) = 0 [pid 1921] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1947] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1946] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1942] <... futex resumed>) = 0 [pid 1938] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1937] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1930] exit_group(0 [pid 1926] close(7 [pid 1921] <... futex resumed>) = 0 [pid 1914] exit_group(0 [pid 1947] <... prctl resumed>) = 0 [pid 1946] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1944] <... futex resumed>) = 0 [pid 1942] sendfile(3, 5, NULL, 140737974943952 [pid 1941] <... futex resumed>) = ? [pid 1938] <... futex resumed>) = 0 [pid 1937] <... futex resumed>) = ? [pid 1930] <... exit_group resumed>) = ? [pid 1926] <... close resumed>) = 0 [pid 1924] <... futex resumed>) = ? [pid 1914] <... exit_group resumed>) = ? [pid 1947] setpgid(0, 0 [pid 1946] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1941] +++ exited with 0 +++ [pid 1938] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1937] +++ exited with 0 +++ [pid 1930] +++ exited with 0 +++ [pid 1926] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1924] +++ exited with 0 +++ [pid 1921] +++ exited with 0 +++ [pid 1946] <... mount resumed>) = 0 [pid 1947] <... setpgid resumed>) = 0 [pid 1926] <... futex resumed>) = 0 [pid 1920] exit_group(0 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1930, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1947] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1946] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1928] <... futex resumed>) = ? [pid 1920] <... exit_group resumed>) = ? [pid 1947] <... openat resumed>) = 3 [pid 1946] <... futex resumed>) = 1 [pid 1944] <... futex resumed>) = 0 [pid 1928] +++ exited with 0 +++ [pid 1926] +++ exited with 0 +++ [pid 1944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1946] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1947] write(3, "1000", 4 [pid 1946] <... open resumed>) = 5 [pid 1944] <... futex resumed>) = 0 [pid 1947] <... write resumed>) = 4 [pid 1946] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1947] close(3 [pid 1946] <... futex resumed>) = 0 [pid 1944] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1942] <... sendfile resumed>) = 1048576 [pid 1947] <... close resumed>) = 0 [pid 1946] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1942] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1947] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1946] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1945] <... write resumed>) = 1048576 [pid 1944] <... futex resumed>) = 0 [pid 1942] <... futex resumed>) = 1 [pid 1938] <... futex resumed>) = 0 [pid 1945] munmap(0x7f6f98bca000, 1048576 [pid 1944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1942] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1945] <... munmap resumed>) = 0 [pid 1945] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1947] <... futex resumed>) = 0 [pid 1946] openat(-1, "/proc/self/exe", O_RDONLY [pid 1945] <... openat resumed>) = 6 [pid 1938] exit_group(0 [pid 1947] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1946] <... openat resumed>) = 7 [pid 1945] ioctl(6, LOOP_SET_FD, 4 [pid 1943] <... futex resumed>) = ? [pid 1942] <... futex resumed>) = ? [pid 1938] <... exit_group resumed>) = ? [pid 1947] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1946] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1943] +++ exited with 0 +++ [pid 1947] <... mprotect resumed>) = 0 [pid 1946] <... futex resumed>) = 1 [pid 1945] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1944] <... futex resumed>) = 0 [pid 1945] ioctl(6, LOOP_CLR_FD) = 0 [pid 1944] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1946] sendfile(5, 7, NULL, 140737974943952 [pid 1947] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1944] <... futex resumed>) = 0 [pid 1944] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1947] <... clone resumed>, parent_tid=[1948], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1948 [ 32.492434][ T1926] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 32.524885][ T1926] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1947] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1947] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1947] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1945] ioctl(6, LOOP_SET_FD, 4 [pid 1947] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1945] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1947] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1945] close(6 [pid 1947] <... mprotect resumed>) = 0 [pid 1945] <... close resumed>) = 0 [pid 1947] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1945] close(4 [pid 1946] <... sendfile resumed>) = 1048576 [pid 1945] <... close resumed>) = 0 [pid 1947] <... clone resumed>, parent_tid=[1949], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1949 [pid 1946] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1945] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1947] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1946] <... futex resumed>) = 1 [pid 1945] <... futex resumed>) = 0 [pid 1944] <... futex resumed>) = 0 [pid 1947] <... futex resumed>) = 0 [pid 1946] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1945] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1944] exit_group(0 [pid 1947] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1946] <... futex resumed>) = ? [pid 1945] <... futex resumed>) = ? [pid 1944] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1948 attached ./strace-static-x86_64: Process 1949 attached [pid 1946] +++ exited with 0 +++ [pid 1945] +++ exited with 0 +++ [pid 1944] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1944, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 1949] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1948] set_robust_list(0x7f6fa100b9e0, 24 [pid 1949] <... set_robust_list resumed>) = 0 [pid 1948] <... set_robust_list resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1949] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1948] memfd_create("syzkaller", 0 [pid 412] <... openat resumed>) = 3 [pid 1949] <... open resumed>) = 4 [pid 1948] <... memfd_create resumed>) = 3 [pid 412] ioctl(3, LOOP_CLR_FD [pid 1949] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1948] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 412] <... ioctl resumed>) = 0 [pid 1949] <... futex resumed>) = 1 [pid 1948] <... mmap resumed>) = 0x7f6f98bca000 [pid 1947] <... futex resumed>) = 0 [pid 412] close(3 [pid 1949] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1948] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1947] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1949] <... mount resumed>) = 0 [pid 1947] <... futex resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 1949] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1947] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1949] <... futex resumed>) = 0 [pid 1947] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1949] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1947] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1949] <... open resumed>) = 5 [pid 1947] <... futex resumed>) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1949] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1947] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1951 attached [pid 1949] <... futex resumed>) = 0 [pid 1947] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1951] set_robust_list(0x5555564066e0, 24 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1951 [pid 410] <... openat resumed>) = 3 [pid 1951] <... set_robust_list resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1951] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1951] <... prctl resumed>) = 0 [pid 1914] +++ exited with 0 +++ [pid 410] close(3 [pid 1951] setpgid(0, 0 [pid 410] <... close resumed>) = 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1914, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1951] <... setpgid resumed>) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 1951] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1947] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1920] +++ exited with 0 +++ [pid 409] <... restart_syscall resumed>) = 0 [pid 1951] <... openat resumed>) = 3 [pid 1947] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1952 [pid 1951] write(3, "1000", 4 [pid 1949] openat(-1, "/proc/self/exe", O_RDONLY [pid 1947] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1920, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1951] <... write resumed>) = 4 [pid 1949] <... openat resumed>) = 6 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 408] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 1952 attached [pid 1951] close(3 [pid 1949] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1948] <... write resumed>) = 1048576 [pid 409] <... openat resumed>) = 3 [pid 408] <... restart_syscall resumed>) = 0 [pid 1952] set_robust_list(0x5555564066e0, 24 [pid 1949] <... futex resumed>) = 1 [pid 1948] munmap(0x7f6f98bca000, 1048576 [pid 1947] <... futex resumed>) = 0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 1952] <... set_robust_list resumed>) = 0 [pid 1951] <... close resumed>) = 0 [pid 1949] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1948] <... munmap resumed>) = 0 [pid 1947] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1952] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1949] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1948] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1947] <... futex resumed>) = 0 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1952] <... prctl resumed>) = 0 [pid 1949] sendfile(5, 6, NULL, 140737974943952 [pid 1948] <... openat resumed>) = 7 [pid 1947] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] close(3 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1952] setpgid(0, 0 [pid 1951] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1949] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1948] ioctl(7, LOOP_SET_FD, 3 [pid 409] <... close resumed>) = 0 [pid 1952] <... setpgid resumed>) = 0 [pid 1951] <... futex resumed>) = 0 [pid 1949] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1948] <... ioctl resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] <... openat resumed>) = 3 [pid 1952] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1949] <... futex resumed>) = 1 [pid 1947] <... futex resumed>) = 0 [pid 1952] <... openat resumed>) = 3 [pid 1949] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 408] ioctl(3, LOOP_CLR_FD [pid 1952] write(3, "1000", 4 [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1953 [pid 408] close(3 [pid 1952] <... write resumed>) = 4 [pid 408] <... close resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1952] close(3) = 0 [pid 1952] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1952] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1952] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1952] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1954 [pid 1952] <... clone resumed>, parent_tid=[1955], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1955 [pid 1952] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 1955 attached ./strace-static-x86_64: Process 1954 attached ./strace-static-x86_64: Process 1953 attached [pid 1951] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1948] close(3 [pid 1955] set_robust_list(0x7f6fa100b9e0, 24 [pid 1954] set_robust_list(0x5555564066e0, 24 [pid 1953] set_robust_list(0x5555564066e0, 24 [pid 1951] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1948] <... close resumed>) = 0 [pid 1955] <... set_robust_list resumed>) = 0 [pid 1954] <... set_robust_list resumed>) = 0 [pid 1953] <... set_robust_list resumed>) = 0 [pid 1951] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1948] mkdir("./bus", 0777 [pid 1942] +++ exited with 0 +++ [pid 1938] +++ exited with 0 +++ [pid 1955] memfd_create("syzkaller", 0 [pid 1954] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1953] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1951] <... mprotect resumed>) = 0 [pid 1948] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1938, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1955] <... memfd_create resumed>) = 3 [pid 1954] <... prctl resumed>) = 0 [pid 1953] <... prctl resumed>) = 0 [pid 1951] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1948] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1955] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1954] setpgid(0, 0 [pid 1953] setpgid(0, 0 [pid 1952] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1955] <... mmap resumed>) = 0x7f6f98beb000 [pid 1954] <... setpgid resumed>) = 0 [pid 1953] <... setpgid resumed>) = 0 [pid 1951] <... clone resumed>, parent_tid=[1956], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1956 [pid 1955] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1954] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1953] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1952] <... futex resumed>) = 0 [pid 1951] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1956 attached [pid 1955] <... write resumed>) = 1048576 [pid 1954] <... openat resumed>) = 3 [pid 1953] <... openat resumed>) = 3 [pid 1952] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1951] <... futex resumed>) = 0 [pid 1956] set_robust_list(0x7f6fa100b9e0, 24 [pid 1954] write(3, "1000", 4 [pid 1953] write(3, "1000", 4 [pid 1952] <... mmap resumed>) = 0x7f6f98bca000 [pid 1951] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1956] <... set_robust_list resumed>) = 0 [pid 1955] munmap(0x7f6f98beb000, 1048576 [pid 1954] <... write resumed>) = 4 [pid 1953] <... write resumed>) = 4 [pid 1952] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1951] <... futex resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 1956] memfd_create("syzkaller", 0 [pid 1955] <... munmap resumed>) = 0 [pid 1954] close(3 [pid 1953] close(3 [pid 1952] <... mprotect resumed>) = 0 [pid 1951] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1956] <... memfd_create resumed>) = 3 [pid 1955] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1954] <... close resumed>) = 0 [pid 1953] <... close resumed>) = 0 [pid 1952] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1951] <... mmap resumed>) = 0x7f6fa0fca000 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1955] <... openat resumed>) = 4 [pid 1954] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1953] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1951] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 407] close(3 [pid 1955] ioctl(4, LOOP_SET_FD, 3 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1951] <... mprotect resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1956] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1954] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1953] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1951] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1956] <... mmap resumed>) = 0x7f6f98bca000 [pid 1954] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1953] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1952] <... clone resumed>, parent_tid=[1959], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1959 [pid 1954] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1953] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1951] <... clone resumed>, parent_tid=[1960], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1960 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1961 [pid 1954] <... mprotect resumed>) = 0 [pid 1953] <... mprotect resumed>) = 0 [pid 1951] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1954] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1953] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1951] <... futex resumed>) = 0 [ 32.596069][ T1948] loop4: detected capacity change from 0 to 2048 [ 32.631676][ T1955] loop3: detected capacity change from 0 to 2048 ./strace-static-x86_64: Process 1959 attached [pid 1956] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1952] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1951] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1954] <... clone resumed>, parent_tid=[1962], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1962 [pid 1953] <... clone resumed>, parent_tid=[1963], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1963 [pid 1952] <... futex resumed>) = 0 [pid 1954] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1953] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1961 attached [pid 1954] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1953] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1961] set_robust_list(0x5555564066e0, 24 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1961] <... set_robust_list resumed>) = 0 [pid 1956] <... write resumed>) = 1048576 [pid 1954] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1953] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1952] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1961] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1959] set_robust_list(0x7f6f98bea9e0, 24 [pid 1956] munmap(0x7f6f98bca000, 1048576 [pid 1954] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1953] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1961] <... prctl resumed>) = 0 [pid 1954] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1953] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1961] setpgid(0, 0 [pid 1954] <... mprotect resumed>) = 0 [pid 1953] <... mprotect resumed>) = 0 [pid 1956] <... munmap resumed>) = 0 ./strace-static-x86_64: Process 1963 attached ./strace-static-x86_64: Process 1962 attached [pid 1961] <... setpgid resumed>) = 0 [pid 1959] <... set_robust_list resumed>) = 0 [pid 1954] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1953] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1963] set_robust_list(0x7f6fa100b9e0, 24 [pid 1961] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1963] <... set_robust_list resumed>) = 0 [pid 1961] <... openat resumed>) = 3 [pid 1954] <... clone resumed>, parent_tid=[1964], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1964 [pid 1953] <... clone resumed>, parent_tid=[1965], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1965 [pid 1963] memfd_create("syzkaller", 0 [pid 1962] set_robust_list(0x7f6fa100b9e0, 24 [pid 1961] write(3, "1000", 4 [pid 1959] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1956] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1953] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1960 attached [pid 1963] <... memfd_create resumed>) = 3 [pid 1962] <... set_robust_list resumed>) = 0 [pid 1961] <... write resumed>) = 4 [pid 1959] <... open resumed>) = 5 [pid 1956] <... openat resumed>) = 4 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1963] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1961] close(3 [pid 1956] ioctl(4, LOOP_SET_FD, 3 [pid 1954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1953] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1963] <... mmap resumed>) = 0x7f6f98bca000 [pid 1961] <... close resumed>) = 0 [pid 1962] memfd_create("syzkaller", 0 [pid 1961] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1960] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1956] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1961] <... futex resumed>) = 0 [pid 1956] ioctl(4, LOOP_CLR_FD [pid 1961] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1956] <... ioctl resumed>) = 0 [pid 1961] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1961] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 1965 attached ./strace-static-x86_64: Process 1964 attached [pid 1963] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1962] <... memfd_create resumed>) = 3 [pid 1961] <... mprotect resumed>) = 0 [pid 1960] <... set_robust_list resumed>) = 0 [pid 1959] <... futex resumed>) = 1 [pid 1952] <... futex resumed>) = 0 [pid 1959] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1956] ioctl(4, LOOP_SET_FD, 3 [pid 1952] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1959] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1956] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1952] <... futex resumed>) = 0 [pid 1959] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1956] close(4 [pid 1952] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1959] <... mount resumed>) = 0 [pid 1956] <... close resumed>) = 0 [pid 1959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1956] close(3 [pid 1965] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1964] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1962] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1960] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1959] <... futex resumed>) = 1 [pid 1956] <... close resumed>) = 0 [pid 1955] <... ioctl resumed>) = 0 [pid 1952] <... futex resumed>) = 0 [pid 1959] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1956] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1952] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1959] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1956] <... futex resumed>) = 0 [pid 1952] <... futex resumed>) = 0 [pid 1959] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1956] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1952] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1963] <... write resumed>) = 1048576 [pid 1959] <... open resumed>) = 6 [pid 1965] <... set_robust_list resumed>) = 0 [pid 1964] <... set_robust_list resumed>) = 0 [pid 1963] munmap(0x7f6f98bca000, 1048576 [pid 1962] <... mmap resumed>) = 0x7f6f98bca000 [pid 1961] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1960] <... open resumed>) = 3 [pid 1959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1955] close(3 [pid 1965] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1964] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1963] <... munmap resumed>) = 0 [pid 1965] <... open resumed>) = 4 [pid 1964] <... open resumed>) = 4 [pid 1963] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1961] <... clone resumed>, parent_tid=[1966], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1966 [pid 1965] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1964] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1963] <... openat resumed>) = 5 [pid 1961] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1965] <... futex resumed>) = 1 [pid 1964] <... futex resumed>) = 1 [pid 1963] ioctl(5, LOOP_SET_FD, 3 [pid 1961] <... futex resumed>) = 0 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1965] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1964] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1962] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1961] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1960] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1959] <... futex resumed>) = 1 [pid 1955] <... close resumed>) = 0 [pid 1954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1953] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1952] <... futex resumed>) = 0 ./strace-static-x86_64: Process 1966 attached [pid 1965] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1964] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1961] <... futex resumed>) = 0 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1948] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1965] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 1964] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 1961] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1960] <... futex resumed>) = 1 [pid 1959] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1953] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1952] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1951] <... futex resumed>) = 0 [pid 1965] <... mount resumed>) = 0 [pid 1964] <... mount resumed>) = 0 [pid 1961] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1959] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1952] <... futex resumed>) = 0 [pid 1951] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1960] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1955] mkdir("./bus", 0777 [pid 1965] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1964] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1961] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1959] openat(-1, "/proc/self/exe", O_RDONLY [pid 1956] <... futex resumed>) = 0 [pid 1952] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1951] <... futex resumed>) = 1 [pid 1965] <... futex resumed>) = 1 [pid 1964] <... futex resumed>) = 1 [pid 1961] <... mprotect resumed>) = 0 [pid 1956] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1951] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1965] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1964] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1961] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1956] <... mount resumed>) = 0 [pid 1954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1953] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1965] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1964] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1956] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1965] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1964] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1961] <... clone resumed>, parent_tid=[1967], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1967 [pid 1956] <... futex resumed>) = 1 [pid 1954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1953] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1951] <... futex resumed>) = 0 [pid 1965] <... open resumed>) = 6 [pid 1964] <... open resumed>) = 5 [pid 1961] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1959] <... openat resumed>) = 3 [pid 1956] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1955] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1951] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1948] ioctl(7, LOOP_CLR_FD [pid 1965] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1964] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1961] <... futex resumed>) = 0 [pid 1959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1956] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1955] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1951] <... futex resumed>) = 0 [pid 1948] <... ioctl resumed>) = 0 [pid 1965] <... futex resumed>) = 1 [pid 1964] <... futex resumed>) = 1 [pid 1961] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1959] <... futex resumed>) = 1 [pid 1956] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1952] <... futex resumed>) = 0 [pid 1951] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1965] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1964] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1959] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1956] <... open resumed>) = 4 [pid 1954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1953] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1952] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1965] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1964] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1959] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1956] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1952] <... futex resumed>) = 0 [pid 1965] openat(-1, "/proc/self/exe", O_RDONLY [pid 1964] openat(-1, "/proc/self/exe", O_RDONLY [pid 1959] sendfile(6, 3, NULL, 140737974943952 [pid 1956] <... futex resumed>) = 1 [pid 1954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1953] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1952] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1951] <... futex resumed>) = 0 [pid 1948] close(7 [pid 1965] <... openat resumed>) = 7 [pid 1964] <... openat resumed>) = 6 [pid 1956] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1951] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1948] <... close resumed>) = 0 [pid 1965] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1964] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1959] <... sendfile resumed>) = 1048576 [pid 1956] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1951] <... futex resumed>) = 0 [pid 1948] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1965] <... futex resumed>) = 1 [pid 1964] <... futex resumed>) = 1 [pid 1959] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1956] openat(-1, "/proc/self/exe", O_RDONLY [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1951] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1947] exit_group(0 [pid 1965] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [ 32.643138][ T1948] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 32.668941][ T1948] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 32.687492][ T1963] loop2: detected capacity change from 0 to 2048 [pid 1964] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1962] <... write resumed>) = 1048576 [pid 1959] <... futex resumed>) = 1 [pid 1956] <... openat resumed>) = 5 [pid 1954] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1953] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1952] <... futex resumed>) = 0 [pid 1949] <... futex resumed>) = ? [pid 1948] <... futex resumed>) = ? [pid 1947] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1967 attached [pid 1966] set_robust_list(0x7f6fa100b9e0, 24 [pid 1965] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1964] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1963] <... ioctl resumed>) = 0 [pid 1956] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1965] sendfile(6, 7, NULL, 140737974943952 [pid 1964] sendfile(5, 6, NULL, 140737974943952 [pid 1956] <... futex resumed>) = 1 [pid 1954] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1953] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1951] <... futex resumed>) = 0 [pid 1966] <... set_robust_list resumed>) = 0 [pid 1956] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1951] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1967] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1966] memfd_create("syzkaller", 0 [pid 1963] close(3 [pid 1956] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1951] <... futex resumed>) = 0 [pid 1967] <... set_robust_list resumed>) = 0 [pid 1966] <... memfd_create resumed>) = 3 [pid 1963] <... close resumed>) = 0 [pid 1956] sendfile(4, 5, NULL, 140737974943952 [pid 1951] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1967] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1966] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1963] mkdir("./bus", 0777 [pid 1967] <... open resumed>) = 4 [pid 1966] <... mmap resumed>) = 0x7f6f98bca000 [pid 1963] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1967] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1963] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1962] munmap(0x7f6f98bca000, 1048576 [pid 1959] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1949] +++ exited with 0 +++ [pid 1948] +++ exited with 0 +++ [pid 1947] +++ exited with 0 +++ [pid 1967] <... futex resumed>) = 1 [pid 1962] <... munmap resumed>) = 0 [pid 1961] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1947, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1967] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1961] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1967] <... mount resumed>) = 0 [pid 1962] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1961] <... futex resumed>) = 0 [pid 1967] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1961] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 1967] <... futex resumed>) = 0 [pid 1961] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 411] <... openat resumed>) = 3 [pid 1967] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1962] <... openat resumed>) = 7 [pid 1961] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] ioctl(3, LOOP_CLR_FD [pid 1967] <... open resumed>) = 5 [pid 1962] ioctl(7, LOOP_SET_FD, 3 [pid 1961] <... futex resumed>) = 0 [pid 411] <... ioctl resumed>) = 0 [pid 1967] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1961] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] close(3 [pid 1967] <... futex resumed>) = 0 [pid 1961] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 411] <... close resumed>) = 0 [pid 1967] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1961] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1967] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1966] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1961] <... futex resumed>) = 0 [pid 1967] openat(-1, "/proc/self/exe", O_RDONLY [pid 1961] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1970 [pid 1967] <... openat resumed>) = 6 [pid 1967] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1961] <... futex resumed>) = 0 [pid 1967] sendfile(5, 6, NULL, 140737974943952 [pid 1961] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1967] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1961] <... futex resumed>) = 0 [pid 1967] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1961] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1967] <... futex resumed>) = 0 [pid 1966] <... write resumed>) = 1048576 [pid 1961] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1967] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1966] munmap(0x7f6f98bca000, 1048576) = 0 ./strace-static-x86_64: Process 1970 attached [pid 1966] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 7 [pid 1970] set_robust_list(0x5555564066e0, 24 [pid 1966] ioctl(7, LOOP_SET_FD, 3 [pid 1970] <... set_robust_list resumed>) = 0 [pid 1966] <... ioctl resumed>) = 0 [pid 1970] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1970] setpgid(0, 0) = 0 [pid 1970] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1966] close(3) = 0 [pid 1966] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 1966] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1970] write(3, "1000", 4) = 4 [pid 1970] close(3) = 0 [pid 1970] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1970] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1970] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1970] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1971], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1971 [pid 1970] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1970] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1970] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1970] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1970] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1972], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1972 [pid 1970] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1970] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1971 attached [pid 1971] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1971] memfd_create("syzkaller", 0) = 3 [pid 1971] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1971] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1965] <... sendfile resumed>) = 1048576 [pid 1964] <... sendfile resumed>) = 1048576 [pid 1956] <... sendfile resumed>) = 1048576 [pid 1965] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1964] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1956] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1965] <... futex resumed>) = 1 [pid 1964] <... futex resumed>) = 1 [pid 1956] <... futex resumed>) = 1 [pid 1954] <... futex resumed>) = 0 [pid 1953] <... futex resumed>) = 0 [pid 1951] <... futex resumed>) = 0 [pid 1965] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1964] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1956] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1951] exit_group(0 [pid 1960] <... futex resumed>) = ? [pid 1956] <... futex resumed>) = ? [pid 1951] <... exit_group resumed>) = ? [pid 1960] +++ exited with 0 +++ [pid 1956] +++ exited with 0 +++ [pid 1951] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1951, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 412] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1972 attached , child_tidptr=0x5555564066d0) = 1976 [pid 1972] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1972] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [ 32.716334][ T1968] EXT4-fs warning (device loop3): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 32.716827][ T1955] EXT4-fs (loop3): get root inode failed [ 32.743516][ T1962] loop1: detected capacity change from 0 to 2048 [ 32.749662][ T1966] loop0: detected capacity change from 0 to 2048 [pid 1972] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1962] <... ioctl resumed>) = 0 [pid 1962] close(3 [pid 1972] <... futex resumed>) = 1 [pid 1962] <... close resumed>) = 0 [pid 1972] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1970] <... futex resumed>) = 0 [pid 1962] mkdir("./bus", 0777 [pid 1970] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1962] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1972] <... futex resumed>) = 0 [pid 1970] <... futex resumed>) = 1 [pid 1962] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1972] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1970] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1972] <... mount resumed>) = 0 [pid 1971] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 1976 attached [pid 1976] set_robust_list(0x5555564066e0, 24 [pid 1972] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1970] <... futex resumed>) = 0 [pid 1972] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1976] <... set_robust_list resumed>) = 0 [pid 1972] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1970] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1976] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1972] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1971] munmap(0x7f6f98bca000, 1048576 [pid 1970] <... futex resumed>) = 0 [pid 1972] <... open resumed>) = 5 [pid 1970] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1972] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1970] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1972] <... futex resumed>) = 0 [pid 1970] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1972] openat(-1, "/proc/self/exe", O_RDONLY [pid 1970] <... futex resumed>) = 0 [pid 1972] <... openat resumed>) = 6 [pid 1970] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1972] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1970] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1972] <... futex resumed>) = 0 [pid 1970] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1972] sendfile(5, 6, NULL, 140737974943952 [pid 1970] <... futex resumed>) = 0 [pid 1970] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1955] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 1955] ioctl(4, LOOP_CLR_FD) = 0 [pid 1955] close(4) = 0 [pid 1955] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1952] exit_group(0 [pid 1959] <... futex resumed>) = ? [pid 1955] <... futex resumed>) = ? [pid 1952] <... exit_group resumed>) = ? [ 32.781836][ T1963] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 32.788596][ T1955] EXT4-fs (loop3): mount failed [ 32.809028][ T1963] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 32.809365][ T1966] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 1976] <... prctl resumed>) = 0 [pid 1972] <... sendfile resumed>) = 1048576 [pid 1971] <... munmap resumed>) = 0 [pid 1959] +++ exited with 0 +++ [pid 1955] +++ exited with 0 +++ [pid 1952] +++ exited with 0 +++ [pid 1972] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1970] <... futex resumed>) = 0 [pid 1972] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1976] setpgid(0, 0 [pid 1971] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1952, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 1976] <... setpgid resumed>) = 0 [pid 1971] <... openat resumed>) = 7 [pid 1976] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1971] ioctl(7, LOOP_SET_FD, 3 [pid 1976] <... openat resumed>) = 3 [pid 1971] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1976] write(3, "1000", 4 [pid 1971] ioctl(7, LOOP_CLR_FD [pid 1976] <... write resumed>) = 4 [pid 1971] <... ioctl resumed>) = 0 [pid 1976] close(3) = 0 [pid 1976] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1976] <... futex resumed>) = 0 [pid 410] <... openat resumed>) = 3 [pid 1976] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1976] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1971] ioctl(7, LOOP_SET_FD, 3 [pid 410] <... ioctl resumed>) = 0 [pid 1976] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1971] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 410] close(3 [pid 1976] <... mprotect resumed>) = 0 [pid 1971] close(7 [pid 410] <... close resumed>) = 0 [pid 1976] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1971] <... close resumed>) = 0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1971] close(3./strace-static-x86_64: Process 1980 attached [pid 1976] <... clone resumed>, parent_tid=[1980], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1980 [pid 1971] <... close resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1981 [pid 1980] set_robust_list(0x7f6fa100b9e0, 24 [pid 1976] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1971] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1962] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1980] <... set_robust_list resumed>) = 0 [pid 1976] <... futex resumed>) = 0 [pid 1971] <... futex resumed>) = 0 [pid 1970] exit_group(0 [pid 1962] ioctl(7, LOOP_CLR_FD [pid 1980] memfd_create("syzkaller", 0 [pid 1976] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1972] <... futex resumed>) = -1 (errno 18446744073709551414) [pid 1970] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 1981 attached [pid 1980] <... memfd_create resumed>) = 3 [pid 1976] <... futex resumed>) = 0 [pid 1972] +++ exited with 0 +++ [pid 1981] set_robust_list(0x5555564066e0, 24 [pid 1980] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1976] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1966] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1980] <... mmap resumed>) = 0x7f6f98beb000 [pid 1981] <... set_robust_list resumed>) = 0 [pid 1976] <... mmap resumed>) = 0x7f6f98bca000 [pid 1966] ioctl(7, LOOP_CLR_FD [pid 1981] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1976] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 1966] <... ioctl resumed>) = 0 [pid 1981] <... prctl resumed>) = 0 [pid 1976] <... mprotect resumed>) = 0 [pid 1966] close(7 [pid 1963] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 1981] setpgid(0, 0 [pid 1976] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1966] <... close resumed>) = 0 [pid 1963] ioctl(5, LOOP_CLR_FD [pid 1981] <... setpgid resumed>) = 0 [pid 1966] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1981] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1976] <... clone resumed>, parent_tid=[1982], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 1982 [pid 1966] <... futex resumed>) = 0 [pid 1961] exit_group(0 [pid 1981] <... openat resumed>) = 3 [pid 1976] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1967] <... futex resumed>) = ? [pid 1961] <... exit_group resumed>) = ? [pid 1981] write(3, "1000", 4 [pid 1976] <... futex resumed>) = 0 [pid 1967] +++ exited with 0 +++ [pid 1966] +++ exited with 0 +++ [pid 1961] +++ exited with 0 +++ [pid 1981] <... write resumed>) = 4 [pid 1976] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1961, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1981] close(3 [pid 1980] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1981] <... close resumed>) = 0 [pid 1981] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1981] <... futex resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 1981] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 407] ioctl(3, LOOP_CLR_FD [pid 1981] <... mmap resumed>) = 0x7f6fa0feb000 [pid 407] <... ioctl resumed>) = 0 [pid 1981] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 407] close(3 [pid 1981] <... mprotect resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 1981] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1981] <... clone resumed>, parent_tid=[1983], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1983 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 1984 [pid 1981] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1981] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1981] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1981] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1981] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1985], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1985 [pid 1981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1982 attached [pid 1982] set_robust_list(0x7f6f98bea9e0, 24) = 0 [pid 1982] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1980] <... write resumed>) = 1048576 [pid 1980] munmap(0x7f6f98beb000, 1048576./strace-static-x86_64: Process 1985 attached ./strace-static-x86_64: Process 1984 attached ./strace-static-x86_64: Process 1983 attached [pid 1985] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1984] set_robust_list(0x5555564066e0, 24 [pid 1983] set_robust_list(0x7f6fa100b9e0, 24 [pid 1980] <... munmap resumed>) = 0 [pid 1984] <... set_robust_list resumed>) = 0 [pid 1984] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1980] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1985] <... set_robust_list resumed>) = 0 [pid 1983] <... set_robust_list resumed>) = 0 [pid 1984] setpgid(0, 0) = 0 [pid 1984] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1980] <... openat resumed>) = 5 [pid 1985] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1984] <... openat resumed>) = 3 [pid 1984] write(3, "1000", 4) = 4 [pid 1984] close(3) = 0 [pid 1984] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1984] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1984] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1984] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1980] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 1984] <... clone resumed>, parent_tid=[1986], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1986 [pid 1980] ioctl(5, LOOP_CLR_FD [pid 1984] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1980] <... ioctl resumed>) = 0 [pid 1984] <... futex resumed>) = 0 [pid 1984] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1984] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1984] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1983] memfd_create("syzkaller", 0 [pid 1984] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1987], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1987 [pid 1983] <... memfd_create resumed>) = 4 [pid 1984] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1980] ioctl(5, LOOP_SET_FD, 3 [pid 1984] <... futex resumed>) = 0 [pid 1980] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1984] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1980] close(5./strace-static-x86_64: Process 1986 attached ./strace-static-x86_64: Process 1987 attached [pid 1986] set_robust_list(0x7f6fa100b9e0, 24 [pid 1987] set_robust_list(0x7f6fa0fea9e0, 24 [pid 1986] <... set_robust_list resumed>) = 0 [pid 1980] <... close resumed>) = 0 [pid 1987] <... set_robust_list resumed>) = 0 [pid 1980] close(3 [pid 1987] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1986] memfd_create("syzkaller", 0) = 4 [pid 1986] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1980] <... close resumed>) = 0 [pid 1983] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1980] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1980] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1983] <... mmap resumed>) = 0x7f6f98bca000 [pid 1986] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1983] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 1983] munmap(0x7f6f98bca000, 1048576) = 0 [pid 1983] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 5 [pid 1983] ioctl(5, LOOP_SET_FD, 4 [pid 1986] <... write resumed>) = 1048576 [pid 1983] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1987] <... open resumed>) = 3 [pid 1985] <... open resumed>) = 3 [pid 1982] <... open resumed>) = 4 [pid 1987] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1984] <... futex resumed>) = 0 [pid 1987] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 1984] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1987] <... mount resumed>) = 0 [pid 1984] <... futex resumed>) = 0 [pid 1987] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1984] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1987] <... futex resumed>) = 0 [pid 1984] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1987] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1984] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1987] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1984] <... futex resumed>) = 0 [pid 1963] <... ioctl resumed>) = 0 [pid 1985] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1982] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1987] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1986] munmap(0x7f6f98bca000, 1048576 [pid 1985] <... futex resumed>) = 1 [pid 1983] ioctl(5, LOOP_CLR_FD [pid 1982] <... futex resumed>) = 1 [pid 1981] <... futex resumed>) = 0 [pid 1976] <... futex resumed>) = 0 [pid 1963] close(5 [pid 1985] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1982] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1976] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1963] <... close resumed>) = 0 [pid 1984] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1985] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1981] <... futex resumed>) = 0 [pid 1980] <... futex resumed>) = 0 [pid 1976] <... futex resumed>) = 1 [pid 1963] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1985] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1980] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1976] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1963] <... futex resumed>) = 0 [pid 1985] <... mount resumed>) = 0 [pid 1980] <... mount resumed>) = 0 [pid 1963] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1986] <... munmap resumed>) = 0 [pid 1983] <... ioctl resumed>) = 0 [pid 1953] exit_group(0 [pid 1962] <... ioctl resumed>) = 0 [pid 1985] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1980] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1965] <... futex resumed>) = ? [pid 1963] <... futex resumed>) = ? [pid 1962] close(7 [pid 1953] <... exit_group resumed>) = ? [pid 1985] <... futex resumed>) = 1 [pid 1981] <... futex resumed>) = 0 [pid 1980] <... futex resumed>) = 1 [pid 1976] <... futex resumed>) = 0 [pid 1965] +++ exited with 0 +++ [pid 1963] +++ exited with 0 +++ [pid 1986] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 1953] +++ exited with 0 +++ [pid 1981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1980] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1985] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1976] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1981] <... futex resumed>) = 0 [pid 1962] <... close resumed>) = 0 [pid 1981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1980] <... open resumed>) = 3 [pid 1976] <... futex resumed>) = 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1953, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 1985] <... open resumed>) = 6 [pid 1980] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1976] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1962] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1985] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1980] <... futex resumed>) = 0 [pid 1976] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1985] <... futex resumed>) = 1 [pid 1981] <... futex resumed>) = 0 [pid 1980] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1976] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1962] <... futex resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 1985] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1980] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1976] <... futex resumed>) = 0 [pid 1962] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] ioctl(3, LOOP_CLR_FD [pid 1985] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1981] <... futex resumed>) = 0 [pid 1980] openat(-1, "/proc/self/exe", O_RDONLY [pid 1976] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 1985] openat(-1, "/proc/self/exe", O_RDONLY [pid 1981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1980] <... openat resumed>) = 5 [pid 409] close(3 [pid 1985] <... openat resumed>) = 7 [pid 1980] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1954] exit_group(0 [pid 409] <... close resumed>) = 0 [ 32.835942][ T1966] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 32.846281][ T1962] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 32.860743][ T1962] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 1985] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1980] <... futex resumed>) = 1 [pid 1976] <... futex resumed>) = 0 [pid 1964] <... futex resumed>) = ? [pid 1962] <... futex resumed>) = ? [pid 1954] <... exit_group resumed>) = ? [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 1985] <... futex resumed>) = 1 [pid 1981] <... futex resumed>) = 0 [pid 1980] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1976] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1964] +++ exited with 0 +++ [pid 1981] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1983] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 1983] close(5) = 0 [pid 1981] <... futex resumed>) = 0 [pid 1980] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1976] <... futex resumed>) = 0 [pid 1985] sendfile(6, 7, NULL, 140737974943952 [pid 1983] close(4 [pid 1981] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1980] sendfile(3, 5, NULL, 140737974943952 [pid 1976] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1983] <... close resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 1988 ./strace-static-x86_64: Process 1988 attached [pid 1988] set_robust_list(0x5555564066e0, 24) = 0 [pid 1988] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1983] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] <... prctl resumed>) = 0 [pid 1983] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1988] setpgid(0, 0) = 0 [pid 1988] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 1988] write(3, "1000", 4) = 4 [pid 1988] close(3) = 0 [pid 1988] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1988] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1988] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1989], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1989 [pid 1988] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1988] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1988] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1990], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1990 [pid 1988] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1990 attached [pid 1990] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1990] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 1990] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1988] <... futex resumed>) = 0 [pid 1988] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1990] <... futex resumed>) = 1 [pid 1990] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 1990] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1988] <... futex resumed>) = 0 [pid 1988] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1990] <... futex resumed>) = 1 [pid 1990] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 4 [pid 1990] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1988] <... futex resumed>) = 0 [pid 1988] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1990] <... futex resumed>) = 1 [pid 1990] openat(-1, "/proc/self/exe", O_RDONLY) = 5 [pid 1990] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1988] <... futex resumed>) = 0 [pid 1988] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1988] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1990] <... futex resumed>) = 1 [pid 1990] sendfile(4, 5, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 1990] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1988] <... futex resumed>) = 0 [pid 1990] <... futex resumed>) = 1 [pid 1990] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1989 attached [pid 1989] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 1989] memfd_create("syzkaller", 0) = 6 [pid 1989] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 1980] <... sendfile resumed>) = 1048576 [pid 1980] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1985] <... sendfile resumed>) = 1048576 [pid 1980] <... futex resumed>) = 1 [pid 1976] <... futex resumed>) = 0 [pid 1976] exit_group(0 [pid 1980] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1985] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1982] <... futex resumed>) = ? [pid 1976] <... exit_group resumed>) = ? [pid 1980] <... futex resumed>) = ? [pid 1982] +++ exited with 0 +++ [pid 1980] +++ exited with 0 +++ [pid 1976] +++ exited with 0 +++ [pid 1985] <... futex resumed>) = 1 [pid 1981] <... futex resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1976, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 1985] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1981] exit_group(0 [pid 1983] <... futex resumed>) = ? [pid 1981] <... exit_group resumed>) = ? [pid 1985] <... futex resumed>) = ? [pid 1983] +++ exited with 0 +++ [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1985] +++ exited with 0 +++ [pid 1981] +++ exited with 0 +++ [pid 412] <... openat resumed>) = 3 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1981, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 412] ioctl(3, LOOP_CLR_FD [pid 410] restart_syscall(<... resuming interrupted clone ...> [pid 412] <... ioctl resumed>) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 410] <... restart_syscall resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 1991 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 1989] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 1991 attached ) = 1048576 [pid 1991] set_robust_list(0x5555564066e0, 24) = 0 [pid 1989] munmap(0x7f6f98bca000, 1048576 [pid 1991] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 1991] setpgid(0, 0) = 0 [pid 1989] <... munmap resumed>) = 0 [pid 1991] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1989] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 1991] <... openat resumed>) = 3 [pid 1989] <... openat resumed>) = 7 [pid 1991] write(3, "1000", 4 [pid 1989] ioctl(7, LOOP_SET_FD, 6 [pid 1991] <... write resumed>) = 4 [pid 1991] close(3) = 0 [pid 1991] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1991] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 1991] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1989] <... ioctl resumed>) = 0 [pid 1991] <... mprotect resumed>) = 0 [pid 1989] close(6 [pid 1991] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1992 attached [pid 1989] <... close resumed>) = 0 [pid 1991] <... clone resumed>, parent_tid=[1992], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 1992 [pid 1991] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1989] mkdir("./bus", 0777 [pid 1991] <... futex resumed>) = 0 [pid 1992] set_robust_list(0x7f6fa100b9e0, 24 [pid 1989] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1992] <... set_robust_list resumed>) = 0 [pid 1991] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1989] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 1991] <... futex resumed>) = 0 [pid 1991] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 1991] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 1991] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1993 attached [pid 1993] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 1993] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1991] <... clone resumed>, parent_tid=[1993], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 1993 [pid 1991] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1993] <... futex resumed>) = 0 [pid 1991] <... futex resumed>) = 1 [pid 1991] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1993] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1992] memfd_create("syzkaller", 0 [pid 1993] <... open resumed>) = 3 [pid 1993] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1993] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1991] <... futex resumed>) = 0 [pid 1992] <... memfd_create resumed>) = 4 [pid 1991] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1993] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1993] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 1991] <... futex resumed>) = 0 [pid 1993] <... mount resumed>) = 0 [pid 1992] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 1991] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1993] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1992] <... mmap resumed>) = 0x7f6f98bca000 [pid 1993] <... futex resumed>) = 1 [pid 1991] <... futex resumed>) = 0 [pid 1991] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1993] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1991] <... futex resumed>) = 0 [pid 1991] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1993] <... open resumed>) = 5 [pid 1993] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1991] <... futex resumed>) = 0 [pid 1993] openat(-1, "/proc/self/exe", O_RDONLY [pid 1991] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1991] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1993] <... openat resumed>) = 6 [pid 1993] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1991] <... futex resumed>) = 0 [pid 1993] sendfile(5, 6, NULL, 140737974943952 [pid 1991] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1991] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1992] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1984] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 1992] <... write resumed>) = 1048576 [pid 1984] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1992] munmap(0x7f6f98bca000, 1048576 [pid 1984] <... futex resumed>) = 0 [pid 1992] <... munmap resumed>) = 0 [pid 1984] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1992] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 1984] <... mmap resumed>) = 0x7f6f98ca9000 [pid 1993] <... sendfile resumed>) = 1048576 [pid 1992] <... openat resumed>) = 7 [pid 1987] <... open resumed>) = 5 [pid 1986] <... openat resumed>) = 6 [pid 1984] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE [pid 1971] +++ exited with 0 +++ [pid 1970] +++ exited with 0 +++ [pid 1962] +++ exited with 0 +++ [pid 1954] +++ exited with 0 +++ [pid 410] <... openat resumed>) = 3 [pid 1992] ioctl(7, LOOP_SET_FD, 4 [pid 1987] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [ 32.938073][ T1989] loop2: detected capacity change from 0 to 2048 [ 32.957529][ T1989] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 1986] ioctl(6, LOOP_SET_FD, 4 [pid 1984] <... mprotect resumed>) = 0 [pid 1993] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1992] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1987] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD [pid 1993] <... futex resumed>) = 1 [pid 1991] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1970, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1954, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 1993] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 410] close(3 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 411] <... openat resumed>) = 3 [pid 410] <... close resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 411] ioctl(3, LOOP_CLR_FD [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] ioctl(3, LOOP_CLR_FD [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 408] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 411] close(3 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 1996 [pid 408] close(3 [pid 411] <... close resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 1997 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 1998 ./strace-static-x86_64: Process 1997 attached [pid 1997] set_robust_list(0x5555564066e0, 24./strace-static-x86_64: Process 1998 attached [pid 1998] set_robust_list(0x5555564066e0, 24 [pid 1997] <... set_robust_list resumed>) = 0 [pid 1997] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1998] <... set_robust_list resumed>) = 0 [pid 1997] <... prctl resumed>) = 0 [pid 1997] setpgid(0, 0) = 0 [pid 1998] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1997] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1998] <... prctl resumed>) = 0 [pid 1998] setpgid(0, 0) = 0 [pid 1998] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1992] ioctl(7, LOOP_CLR_FD [pid 1987] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1984] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1997] <... openat resumed>) = 3 [pid 1998] <... openat resumed>) = 3 [pid 1997] write(3, "1000", 4) = 4 [pid 1998] write(3, "1000", 4 [pid 1997] close(3 [pid 1992] <... ioctl resumed>) = 0 [pid 1984] <... clone resumed>, parent_tid=[1999], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 1999 [pid 1984] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 1998] <... write resumed>) = 4 [pid 1997] <... close resumed>) = 0 [pid 1984] <... futex resumed>) = 0 [pid 1998] close(3 [pid 1997] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1984] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1998] <... close resumed>) = 0 [pid 1997] <... futex resumed>) = 0 [pid 1998] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1997] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1998] <... futex resumed>) = 0 [pid 1997] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1998] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1997] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1998] <... mmap resumed>) = 0x7f6fa0feb000 [pid 1997] <... mprotect resumed>) = 0 ./strace-static-x86_64: Process 1996 attached [pid 1998] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1997] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1986] <... ioctl resumed>) = 0 [pid 1998] <... mprotect resumed>) = 0 [pid 1996] set_robust_list(0x5555564066e0, 24 [pid 1992] ioctl(7, LOOP_SET_FD, 4 [pid 1998] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1997] <... clone resumed>, parent_tid=[2000], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2000 [pid 1996] <... set_robust_list resumed>) = 0 [pid 1986] close(4 [pid 1992] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 1997] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1992] close(7) = 0 [pid 1992] close(4 [pid 1986] <... close resumed>) = 0 [pid 1996] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 1998] <... clone resumed>, parent_tid=[2001], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2001 [pid 1997] <... futex resumed>) = 0 [pid 1998] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1997] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1998] <... futex resumed>) = 0 [pid 1997] <... futex resumed>) = 0 [pid 1998] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1997] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1998] <... futex resumed>) = 0 [pid 1997] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1998] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1997] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE./strace-static-x86_64: Process 1999 attached [pid 1999] set_robust_list(0x7f6f98cc99e0, 24 [pid 1998] <... mmap resumed>) = 0x7f6fa0fca000 [pid 1997] <... mprotect resumed>) = 0 [pid 1999] <... set_robust_list resumed>) = 0 [pid 1998] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 1997] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1999] openat(-1, "/proc/self/exe", O_RDONLY [pid 1998] <... mprotect resumed>) = 0 [pid 1999] <... openat resumed>) = 4 [pid 1998] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1997] <... clone resumed>, parent_tid=[2002], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2002 ./strace-static-x86_64: Process 2001 attached [pid 1999] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 1997] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2001] set_robust_list(0x7f6fa100b9e0, 24 [pid 1999] <... futex resumed>) = 1 [pid 1998] <... clone resumed>, parent_tid=[2003], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2003 [pid 1997] <... futex resumed>) = 0 [pid 1992] <... close resumed>) = 0 [pid 1984] <... futex resumed>) = 0 [pid 1986] mkdir("./bus", 0777 [pid 1996] <... prctl resumed>) = 0 [pid 1998] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1997] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1984] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1998] <... futex resumed>) = 0 [pid 1987] <... futex resumed>) = 0 [pid 1984] <... futex resumed>) = 1 [pid 1998] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1987] sendfile(5, 4, NULL, 140737974943952 [pid 1984] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1992] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1986] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 1996] setpgid(0, 0./strace-static-x86_64: Process 2000 attached [pid 2001] <... set_robust_list resumed>) = 0 [pid 1999] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1987] <... sendfile resumed>) = 1048576 [pid 2001] memfd_create("syzkaller", 0 [pid 2000] set_robust_list(0x7f6fa100b9e0, 24 [pid 1991] exit_group(0 [pid 1987] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1992] <... futex resumed>) = -1 (errno 18446744073709551555) [pid 1986] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 2003 attached [pid 2001] <... memfd_create resumed>) = 3 [pid 2000] <... set_robust_list resumed>) = 0 [pid 1996] <... setpgid resumed>) = 0 [pid 1993] <... futex resumed>) = ? [pid 1992] +++ exited with 0 +++ [pid 1991] <... exit_group resumed>) = ? [pid 1987] <... futex resumed>) = 1 [pid 1984] <... futex resumed>) = 0 ./strace-static-x86_64: Process 2002 attached [pid 2003] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2001] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2000] memfd_create("syzkaller", 0 [pid 1996] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 1993] +++ exited with 0 +++ [pid 1991] +++ exited with 0 +++ [pid 1987] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2003] <... set_robust_list resumed>) = 0 [pid 2002] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2001] <... mmap resumed>) = 0x7f6f98bca000 [pid 2000] <... memfd_create resumed>) = 3 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1991, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 2003] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2002] <... set_robust_list resumed>) = 0 [pid 2001] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2000] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 2003] <... open resumed>) = 4 [pid 2002] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2000] <... mmap resumed>) = 0x7f6f98bca000 [pid 412] <... restart_syscall resumed>) = 0 [pid 2003] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2002] <... open resumed>) = 4 [pid 2000] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1996] <... openat resumed>) = 3 [pid 1989] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2003] <... futex resumed>) = 1 [pid 2002] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1998] <... futex resumed>) = 0 [pid 1996] write(3, "1000", 4 [pid 1989] ioctl(7, LOOP_CLR_FD [pid 2003] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 2002] <... futex resumed>) = 1 [pid 1998] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1997] <... futex resumed>) = 0 [pid 1996] <... write resumed>) = 4 [pid 1989] <... ioctl resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2003] <... mount resumed>) = 0 [pid 2002] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1998] <... futex resumed>) = 0 [pid 1997] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... openat resumed>) = 3 [pid 1996] close(3 [pid 1989] close(7 [pid 2003] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2002] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2000] <... write resumed>) = 1048576 [pid 1998] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1997] <... futex resumed>) = 0 [pid 1986] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 412] ioctl(3, LOOP_CLR_FD [pid 2003] <... futex resumed>) = 0 [pid 2002] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 1998] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1997] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1996] <... close resumed>) = 0 [pid 1989] <... close resumed>) = 0 [pid 1986] ioctl(6, LOOP_CLR_FD [pid 412] <... ioctl resumed>) = 0 [pid 2003] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2002] <... mount resumed>) = 0 [pid 1998] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] close(3 [pid 2003] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2002] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1998] <... futex resumed>) = 0 [pid 1996] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 1989] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... close resumed>) = 0 [pid 2003] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2002] <... futex resumed>) = 1 [pid 1998] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1997] <... futex resumed>) = 0 [pid 1988] exit_group(0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2003] <... open resumed>) = 5 [pid 2002] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1997] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1996] <... futex resumed>) = 0 [pid 1990] <... futex resumed>) = ? [pid 1989] <... futex resumed>) = ? [pid 1988] <... exit_group resumed>) = ? [pid 1986] <... ioctl resumed>) = 0 [pid 2003] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2002] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1997] <... futex resumed>) = 0 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 2004 [pid 2003] <... futex resumed>) = 1 [pid 2002] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1998] <... futex resumed>) = 0 [pid 1997] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1996] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 1990] +++ exited with 0 +++ [pid 2003] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2002] <... open resumed>) = 5 [pid 1998] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1996] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2003] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2002] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1998] <... futex resumed>) = 0 [pid 2003] openat(-1, "/proc/self/exe", O_RDONLY [pid 2002] <... futex resumed>) = 1 [pid 1998] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1997] <... futex resumed>) = 0 [pid 2003] <... openat resumed>) = 6 [pid 2002] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1997] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1996] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1986] close(6 [pid 2003] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2002] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1997] <... futex resumed>) = 0 [pid 2003] <... futex resumed>) = 1 [pid 2002] openat(-1, "/proc/self/exe", O_RDONLY [pid 1998] <... futex resumed>) = 0 [pid 1997] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2003] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2002] <... openat resumed>) = 6 [pid 1998] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1996] <... mprotect resumed>) = 0 [pid 2003] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2002] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1998] <... futex resumed>) = 0 [pid 1986] <... close resumed>) = 0 ./strace-static-x86_64: Process 2004 attached [pid 2003] sendfile(5, 6, NULL, 140737974943952 [pid 2002] <... futex resumed>) = 1 [pid 1998] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1997] <... futex resumed>) = 0 [pid 1996] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2004] set_robust_list(0x5555564066e0, 24 [pid 2003] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 2002] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1997] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1986] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2004] <... set_robust_list resumed>) = 0 [pid 2003] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2002] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1997] <... futex resumed>) = 0 [pid 1996] <... clone resumed>, parent_tid=[2005], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2005 [pid 1986] <... futex resumed>) = 0 [pid 2004] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2003] <... futex resumed>) = 1 [pid 2002] sendfile(5, 6, NULL, 140737974943952 [pid 1998] <... futex resumed>) = 0 [pid 1997] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 1996] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 1984] exit_group(0 [pid 2004] <... prctl resumed>) = 0 [pid 2003] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2002] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 1999] <... futex resumed>) = ? [pid 1996] <... futex resumed>) = 0 [pid 1987] <... futex resumed>) = ? [pid 1984] <... exit_group resumed>) = ? [pid 2004] setpgid(0, 0 [pid 2002] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1999] +++ exited with 0 +++ [pid 1996] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1987] +++ exited with 0 +++ [pid 2004] <... setpgid resumed>) = 0 [pid 2002] <... futex resumed>) = 1 [pid 1997] <... futex resumed>) = 0 [pid 1996] <... futex resumed>) = 0 [pid 2004] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2002] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2004] <... openat resumed>) = 3 [pid 2004] write(3, "1000", 4 [pid 1996] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2004] <... write resumed>) = 4 [pid 1996] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2004] close(3 [pid 1996] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2004] <... close resumed>) = 0 [pid 1996] <... mprotect resumed>) = 0 [pid 2004] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 1996] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2004] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2004] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 1996] <... clone resumed>, parent_tid=[2006], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2006 [pid 2004] <... mprotect resumed>) = 0 [pid 2004] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1996] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2004] <... clone resumed>, parent_tid=[2007], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2007 [pid 1996] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2004] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2004] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2004] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2004] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2004] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2008], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2008 [pid 2004] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2004] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2006 attached [pid 2001] <... write resumed>) = 1048576 [pid 2006] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 2006] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 2006] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1996] <... futex resumed>) = 0 [pid 2006] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1996] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2006] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 1996] <... futex resumed>) = 0 [pid 2006] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 1996] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2001] munmap(0x7f6f98bca000, 1048576 [pid 2006] <... mount resumed>) = 0 [pid 2006] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2001] <... munmap resumed>) = 0 [pid 2000] munmap(0x7f6f98bca000, 1048576 [pid 2006] <... futex resumed>) = 1 [pid 2001] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 1996] <... futex resumed>) = 0 [pid 2006] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 1996] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2006] <... open resumed>) = 4 [pid 2001] <... openat resumed>) = 7 [pid 1996] <... futex resumed>) = 0 [pid 2006] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1996] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2006] <... futex resumed>) = 0 [pid 1996] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2006] openat(-1, "/proc/self/exe", O_RDONLY [pid 1996] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2006] <... openat resumed>) = 5 [pid 2001] ioctl(7, LOOP_SET_FD, 3./strace-static-x86_64: Process 2007 attached [pid 2006] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1996] <... futex resumed>) = 0 [pid 2007] set_robust_list(0x7f6fa100b9e0, 24 [pid 2006] <... futex resumed>) = 0 [pid 2007] <... set_robust_list resumed>) = 0 [pid 2006] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [ 32.981202][ T1989] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 32.988813][ T1986] loop0: detected capacity change from 0 to 2048 [ 33.011507][ T1986] EXT4-fs (loop0): VFS: Can't find ext4 filesystem [pid 1996] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2007] memfd_create("syzkaller", 0 [pid 1996] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2007] <... memfd_create resumed>) = 3 [pid 2007] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2007] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 1996] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2006] <... futex resumed>) = 0 [pid 1996] <... futex resumed>) = 1 [pid 2006] sendfile(4, 5, NULL, 140737974943952 [pid 1996] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2006] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 2006] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 1996] <... futex resumed>) = 0 [pid 2006] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2008 attached ./strace-static-x86_64: Process 2005 attached [pid 2000] <... munmap resumed>) = 0 [pid 2000] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 2008] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2005] set_robust_list(0x7f6fa100b9e0, 24 [pid 2000] <... openat resumed>) = 7 [pid 2008] <... set_robust_list resumed>) = 0 [pid 2005] <... set_robust_list resumed>) = 0 [pid 2000] ioctl(7, LOOP_SET_FD, 3 [pid 2007] <... write resumed>) = 1048576 [pid 2007] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2007] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [pid 2007] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 2007] ioctl(4, LOOP_CLR_FD) = 0 [pid 2007] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 2007] close(4) = 0 [pid 2007] close(3 [pid 2008] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2005] memfd_create("syzkaller", 0 [pid 2008] <... open resumed>) = 3 [pid 2005] <... memfd_create resumed>) = 6 [pid 2008] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2005] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2008] <... futex resumed>) = 1 [pid 2004] <... futex resumed>) = 0 [pid 2004] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2007] <... close resumed>) = 0 [pid 2004] <... futex resumed>) = 0 [pid 2004] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2007] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2007] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2005] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2008] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL) = 0 [pid 2008] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2004] <... futex resumed>) = 0 [pid 2004] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2007] <... futex resumed>) = 0 [pid 2004] <... futex resumed>) = 1 [pid 2007] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2004] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2008] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2007] <... open resumed>) = 4 [pid 2007] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2004] <... futex resumed>) = 0 [pid 2007] openat(-1, "/proc/self/exe", O_RDONLY [pid 2004] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2007] <... openat resumed>) = 5 [pid 2004] <... futex resumed>) = 0 [pid 2007] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2004] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2007] <... futex resumed>) = 0 [pid 2004] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2007] sendfile(4, 5, NULL, 140737974943952 [pid 2004] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2004] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2007] <... sendfile resumed>) = 1048576 [pid 2007] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2004] <... futex resumed>) = 0 [pid 2007] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2004] exit_group(0 [pid 2008] <... futex resumed>) = ? [pid 2007] <... futex resumed>) = ? [pid 2004] <... exit_group resumed>) = ? [pid 2007] +++ exited with 0 +++ [pid 2008] +++ exited with 0 +++ [pid 2004] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2004, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 412] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 2009 ./strace-static-x86_64: Process 2009 attached [pid 2009] set_robust_list(0x5555564066e0, 24) = 0 [pid 2009] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2009] setpgid(0, 0 [pid 1989] +++ exited with 0 +++ [pid 1988] +++ exited with 0 +++ [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1988, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 409] restart_syscall(<... resuming interrupted clone ...> [pid 2009] <... setpgid resumed>) = 0 [pid 2009] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 409] <... restart_syscall resumed>) = 0 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 409] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 409] close(3) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 2010 [pid 2009] <... openat resumed>) = 3 [pid 2009] write(3, "1000", 4) = 4 [pid 2009] close(3) = 0 [pid 2009] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2009] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2005] <... write resumed>) = 1048576 [pid 2001] <... ioctl resumed>) = 0 [pid 2005] munmap(0x7f6f98bca000, 1048576 [pid 2001] close(3) = 0 [pid 2001] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 2009] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2009] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2009] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2001] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2005] <... munmap resumed>) = 0 [pid 2009] <... clone resumed>, parent_tid=[2011], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2011 [pid 2009] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2009] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2009] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2009] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2009] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 1986] +++ exited with 0 +++ [pid 1984] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1984, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 2009] <... clone resumed>, parent_tid=[2012], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2012 [pid 2009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2005] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 2000] <... ioctl resumed>) = 0 [pid 2005] <... openat resumed>) = 7 [pid 2000] close(3 [pid 407] <... restart_syscall resumed>) = 0 [pid 2005] ioctl(7, LOOP_SET_FD, 6 [pid 2000] <... close resumed>) = 0 [ 33.042021][ T2001] loop1: detected capacity change from 0 to 2048 [ 33.054162][ T2000] loop4: detected capacity change from 0 to 2048 [pid 2000] mkdir("./bus", 0777 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 407] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 2013 ./strace-static-x86_64: Process 2010 attached [pid 2010] set_robust_list(0x5555564066e0, 24) = 0 [pid 2010] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2010] setpgid(0, 0) = 0 [pid 2010] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2010] write(3, "1000", 4) = 4 [pid 2010] close(3) = 0 [pid 2010] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2010] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2010] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2010] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2014], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2014 [pid 2010] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2010] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2010] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2010] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2010] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2015], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2015 [pid 2010] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2010] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2012 attached [pid 2012] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 2012] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2005] <... ioctl resumed>) = 0 [pid 2000] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2012] <... open resumed>) = 3 [pid 2012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2000] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2012] <... futex resumed>) = 1 [pid 2009] <... futex resumed>) = 0 [pid 2012] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 2009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2012] <... mount resumed>) = 0 [pid 2009] <... futex resumed>) = 0 [pid 2012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2012] <... futex resumed>) = 0 [pid 2009] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2012] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2012] <... open resumed>) = 4 [pid 2009] <... futex resumed>) = 0 [pid 2012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2012] <... futex resumed>) = 0 [pid 2009] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2012] openat(-1, "/proc/self/exe", O_RDONLY [pid 2009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2012] <... openat resumed>) = 5 [pid 2009] <... futex resumed>) = 0 [pid 2012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2012] <... futex resumed>) = 0 [pid 2009] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 2015 attached [pid 2012] sendfile(4, 5, NULL, 140737974943952 [pid 2009] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2015] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2009] <... futex resumed>) = 0 ./strace-static-x86_64: Process 2014 attached [pid 2015] <... set_robust_list resumed>) = 0 [pid 2009] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2015] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2014] set_robust_list(0x7f6fa100b9e0, 24 [pid 2015] <... open resumed>) = 3 [pid 2014] <... set_robust_list resumed>) = 0 [pid 2015] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2014] memfd_create("syzkaller", 0./strace-static-x86_64: Process 2013 attached [pid 2015] <... futex resumed>) = 1 [pid 2014] <... memfd_create resumed>) = 4 [pid 2010] <... futex resumed>) = 0 [pid 2015] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 2014] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2010] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2015] <... mount resumed>) = 0 [pid 2014] <... mmap resumed>) = 0x7f6f98bca000 [pid 2010] <... futex resumed>) = 0 [pid 2015] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2014] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2013] set_robust_list(0x5555564066e0, 24 [pid 2010] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2015] <... futex resumed>) = 0 [pid 2010] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2015] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2010] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2015] <... open resumed>) = 5 [pid 2010] <... futex resumed>) = 0 [pid 2015] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2012] <... sendfile resumed>) = 1048576 [pid 2010] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2015] <... futex resumed>) = 0 [pid 2012] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2010] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2015] openat(-1, "/proc/self/exe", O_RDONLY [pid 2012] <... futex resumed>) = 1 [pid 2010] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2009] <... futex resumed>) = 0 [pid 2015] <... openat resumed>) = 6 [pid 2012] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2010] <... futex resumed>) = 0 [pid 2015] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2010] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2015] <... futex resumed>) = 0 [pid 2010] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2015] sendfile(5, 6, NULL, 140737974943952 [pid 2010] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2015] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 2010] <... futex resumed>) = 0 [pid 2015] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2010] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2015] <... futex resumed>) = 0 [pid 2010] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2015] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2014] <... write resumed>) = 1048576 [pid 2014] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2014] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 7 [pid 2014] ioctl(7, LOOP_SET_FD, 4./strace-static-x86_64: Process 2011 attached [pid 2013] <... set_robust_list resumed>) = 0 [pid 2005] close(6 [pid 2014] <... ioctl resumed>) = 0 [pid 2014] close(4) = 0 [pid 2014] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 2014] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2013] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2011] set_robust_list(0x7f6fa100b9e0, 24 [pid 2005] <... close resumed>) = 0 [pid 2011] <... set_robust_list resumed>) = 0 [pid 2005] mkdir("./bus", 0777 [pid 2013] <... prctl resumed>) = 0 [pid 2011] memfd_create("syzkaller", 0 [pid 2005] <... mkdir resumed>) = -1 EEXIST (File exists) [ 33.087127][ T2005] loop3: detected capacity change from 0 to 2048 [ 33.106134][ T2001] EXT4-fs (loop1): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 33.116285][ T2014] loop2: detected capacity change from 0 to 2048 [ 33.120605][ T2001] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 2013] setpgid(0, 0 [pid 2011] <... memfd_create resumed>) = 6 [pid 2005] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2013] <... setpgid resumed>) = 0 [pid 2011] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2013] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2011] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2013] <... openat resumed>) = 3 [pid 2013] write(3, "1000", 4) = 4 [pid 2013] close(3) = 0 [pid 2013] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2013] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2013] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2013] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2021], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2021 [pid 2013] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2013] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2011] <... write resumed>) = 1048576 [pid 2013] <... futex resumed>) = 0 [pid 2013] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2011] munmap(0x7f6f98bca000, 1048576 [pid 2013] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2013] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2013] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2001] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2001] ioctl(7, LOOP_CLR_FD [pid 2013] <... clone resumed>, parent_tid=[2024], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2024 [pid 2013] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2013] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2011] <... munmap resumed>) = 0 [pid 2011] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 7 [pid 2011] ioctl(7, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 2011] ioctl(7, LOOP_CLR_FD) = 0 [pid 2011] ioctl(7, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 2011] close(7) = 0 [ 33.149994][ T2000] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 2011] close(6) = 0 [pid 2011] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2009] exit_group(0 [pid 2012] <... futex resumed>) = ? [pid 2011] <... futex resumed>) = ? [pid 2009] <... exit_group resumed>) = ? [pid 2012] +++ exited with 0 +++ [pid 2011] +++ exited with 0 +++ [pid 2009] +++ exited with 0 +++ [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2009, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 412] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 3 [pid 412] ioctl(3, LOOP_CLR_FD) = 0 [pid 412] close(3) = 0 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 2025 ./strace-static-x86_64: Process 2024 attached ./strace-static-x86_64: Process 2021 attached [pid 2001] <... ioctl resumed>) = 0 [pid 2001] close(7) = 0 [pid 2001] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2024] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2021] set_robust_list(0x7f6fa100b9e0, 24 [pid 2001] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1998] exit_group(0 [pid 2003] <... futex resumed>) = ? [pid 2001] <... futex resumed>) = ? [pid 1998] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 2025 attached [pid 2024] <... set_robust_list resumed>) = 0 [pid 2021] <... set_robust_list resumed>) = 0 [pid 2003] +++ exited with 0 +++ [pid 2001] +++ exited with 0 +++ [pid 1998] +++ exited with 0 +++ [pid 2025] set_robust_list(0x5555564066e0, 24) = 0 [pid 2025] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2025] setpgid(0, 0) = 0 [pid 2025] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2025] write(3, "1000", 4) = 4 [pid 2025] close(3) = 0 [pid 2025] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2025] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2025] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2025] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2026], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2026 [pid 2025] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2025] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2025] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2025] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2025] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2027], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2027 [pid 2025] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2025] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2026 attached [pid 2026] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 2026] memfd_create("syzkaller", 0) = 3 [pid 2026] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2026] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 2026] munmap(0x7f6f98bca000, 1048576 [pid 2013] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1998, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 2013] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2013] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2026] <... munmap resumed>) = 0 [pid 2026] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 4 [pid 2013] <... mmap resumed>) = 0x7f6fa0fa9000 [pid 2026] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 2026] ioctl(4, LOOP_CLR_FD) = 0 [pid 2013] mprotect(0x7f6fa0faa000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2013] clone(child_stack=0x7f6fa0fc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2029], tls=0x7f6fa0fc9700, child_tidptr=0x7f6fa0fc99d0) = 2029 [pid 2013] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2013] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2026] ioctl(4, LOOP_SET_FD, 3 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 2000] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 408] <... openat resumed>) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 2000] ioctl(7, LOOP_CLR_FD [pid 408] close(3 [pid 2000] <... ioctl resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2000] close(7) = 0 [pid 2000] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2000] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2026] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 2026] close(4 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 2030 [pid 2026] <... close resumed>) = 0 [pid 2026] close(3 [pid 2021] memfd_create("syzkaller", 0 [pid 2024] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 2021] <... memfd_create resumed>) = 4 [pid 1997] exit_group(0) = ? [pid 2002] <... futex resumed>) = -1 (errno 18446744073709551555) [pid 2002] +++ exited with 0 +++ [ 33.218364][ T2000] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 33.242384][ T2014] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. ./strace-static-x86_64: Process 2030 attached ./strace-static-x86_64: Process 2027 attached [pid 2024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2021] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2000] <... futex resumed>) = ? [pid 2000] +++ exited with 0 +++ [pid 1997] +++ exited with 0 +++ [pid 2026] <... close resumed>) = 0 [pid 2026] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2026] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2029 attached [pid 2029] set_robust_list(0x7f6fa0fc99e0, 24) = 0 [pid 2029] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 2029] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 2013] <... futex resumed>) = 0 [pid 2013] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2013] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2029] <... futex resumed>) = 1 [pid 2029] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1997, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2021] <... mmap resumed>) = 0x7f6f98ba9000 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 2031 [pid 2021] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2024] <... futex resumed>) = 1 [pid 2013] <... futex resumed>) = 0 [pid 2024] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2013] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=23000000} [pid 2024] <... open resumed>) = 5 [pid 2025] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 2024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2025] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} [pid 2024] <... futex resumed>) = 1 [pid 2013] <... futex resumed>) = 0 [pid 2025] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 2024] openat(-1, "/proc/self/exe", O_RDONLY [pid 2013] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2025] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2024] <... openat resumed>) = 6 [pid 2013] <... futex resumed>) = 0 [pid 2026] <... futex resumed>) = 0 [pid 2025] <... futex resumed>) = 1 [pid 2024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2013] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2026] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 2025] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2013] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2026] <... mount resumed>) = 0 [pid 2013] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2031 attached [pid 2026] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2013] <... futex resumed>) = 0 [pid 2031] set_robust_list(0x5555564066e0, 24 [pid 2026] <... futex resumed>) = 1 [pid 2025] <... futex resumed>) = 0 [pid 2024] <... futex resumed>) = 0 [pid 2013] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2031] <... set_robust_list resumed>) = 0 [pid 2026] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2025] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2031] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2026] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2025] <... futex resumed>) = 0 [pid 2024] sendfile(5, 6, NULL, 140737974943952 [pid 2031] <... prctl resumed>) = 0 [pid 2026] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2025] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2031] setpgid(0, 0 [pid 2026] <... open resumed>) = 3 [pid 2031] <... setpgid resumed>) = 0 [pid 2026] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2031] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2030] set_robust_list(0x5555564066e0, 24 [pid 2026] <... futex resumed>) = 1 [pid 2025] <... futex resumed>) = 0 [pid 2024] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 2031] <... openat resumed>) = 3 [pid 2024] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2025] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2031] write(3, "1000", 4 [pid 2026] openat(-1, "/proc/self/exe", O_RDONLY [pid 2025] <... futex resumed>) = 0 [pid 2024] <... futex resumed>) = 1 [pid 2013] <... futex resumed>) = 0 [pid 2031] <... write resumed>) = 4 [pid 2026] <... openat resumed>) = 4 [pid 2025] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2024] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2031] close(3 [pid 2026] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2025] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2031] <... close resumed>) = 0 [pid 2026] <... futex resumed>) = 0 [pid 2025] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2031] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2026] sendfile(3, 4, NULL, 140737974943952 [pid 2025] <... futex resumed>) = 0 [pid 2025] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2031] <... futex resumed>) = 0 [pid 2030] <... set_robust_list resumed>) = 0 [pid 2031] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2030] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2026] <... sendfile resumed>) = 1048576 [pid 2021] <... write resumed>) = 1048576 [pid 2031] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2026] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2031] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2026] <... futex resumed>) = 1 [pid 2025] <... futex resumed>) = 0 [pid 2031] <... mprotect resumed>) = 0 [pid 2026] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2031] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2030] <... prctl resumed>) = 0 ./strace-static-x86_64: Process 2032 attached [pid 2030] setpgid(0, 0 [pid 2031] <... clone resumed>, parent_tid=[2032], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2032 [pid 2030] <... setpgid resumed>) = 0 [pid 2032] set_robust_list(0x7f6fa100b9e0, 24 [pid 2031] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2030] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2027] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2032] <... set_robust_list resumed>) = 0 [pid 2031] <... futex resumed>) = 0 [pid 2030] <... openat resumed>) = 3 [pid 2031] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2030] write(3, "1000", 4 [pid 2027] <... set_robust_list resumed>) = 0 [pid 2032] memfd_create("syzkaller", 0 [pid 2031] <... futex resumed>) = 0 [pid 2030] <... write resumed>) = 4 [pid 2027] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2032] <... memfd_create resumed>) = 3 [pid 2031] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2030] close(3 [pid 2027] <... open resumed>) = 5 [pid 2005] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2031] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2030] <... close resumed>) = 0 [pid 2027] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2021] munmap(0x7f6f98ba9000, 1048576 [pid 2005] ioctl(7, LOOP_CLR_FD [pid 2031] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2030] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2031] <... mprotect resumed>) = 0 [pid 2030] <... futex resumed>) = 0 [pid 2027] <... futex resumed>) = 0 [pid 2021] <... munmap resumed>) = 0 [pid 2005] <... ioctl resumed>) = 0 [pid 2032] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2031] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2030] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2027] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2021] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 2005] close(7 [pid 2030] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2025] exit_group(0 [pid 2031] <... clone resumed>, parent_tid=[2033], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2033 [pid 2030] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2026] <... futex resumed>) = ? [pid 2025] <... exit_group resumed>) = ? [pid 2031] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2030] <... mprotect resumed>) = 0 [pid 2026] +++ exited with 0 +++ [pid 2031] <... futex resumed>) = 0 [pid 2030] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2031] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2030] <... clone resumed>, parent_tid=[2034], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2034 [pid 2027] <... futex resumed>) = ? [pid 2032] <... mmap resumed>) = 0x7f6f98bca000 [pid 2030] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2027] +++ exited with 0 +++ [pid 2025] +++ exited with 0 +++ [pid 2021] <... openat resumed>) = 7 [pid 2005] <... close resumed>) = 0 [pid 2030] <... futex resumed>) = 0 [pid 2030] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2021] ioctl(7, LOOP_SET_FD, 4 [ 33.269216][ T2005] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 33.272305][ T2014] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 33.282987][ T2005] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 2005] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2025, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 2032] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2030] <... futex resumed>) = 0 [pid 2005] <... futex resumed>) = 0 [pid 412] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 2034 attached [pid 2030] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2005] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 1996] exit_group(0 [pid 2034] set_robust_list(0x7f6fa100b9e0, 24 [pid 2030] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2006] <... futex resumed>) = ? [pid 2005] <... futex resumed>) = ? [pid 1996] <... exit_group resumed>) = ? [pid 412] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 2033 attached [pid 2034] <... set_robust_list resumed>) = 0 [pid 2030] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2021] <... ioctl resumed>) = 0 [pid 2014] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2006] +++ exited with 0 +++ [pid 2005] +++ exited with 0 +++ [pid 2034] memfd_create("syzkaller", 0 [pid 2033] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2030] <... mprotect resumed>) = 0 [pid 2034] <... memfd_create resumed>) = 3 [pid 2033] <... set_robust_list resumed>) = 0 [pid 2030] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2021] close(4 [pid 2014] ioctl(7, LOOP_CLR_FD [pid 2034] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2033] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2034] <... mmap resumed>) = 0x7f6f98bca000 [pid 2032] <... write resumed>) = 1048576 [pid 2030] <... clone resumed>, parent_tid=[2035], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2035 [pid 2014] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 2035 attached [pid 2033] <... open resumed>) = 4 [pid 2030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2021] <... close resumed>) = 0 [pid 2014] close(7 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2035] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2033] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2030] <... futex resumed>) = 0 [pid 2021] mkdir("./bus", 0777 [pid 2014] <... close resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 2035] <... set_robust_list resumed>) = 0 [pid 2033] <... futex resumed>) = 1 [pid 2032] munmap(0x7f6f98bca000, 1048576 [pid 2031] <... futex resumed>) = 0 [pid 2030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2021] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2014] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] ioctl(3, LOOP_CLR_FD [pid 2035] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2034] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2033] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2032] <... munmap resumed>) = 0 [pid 2031] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2021] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2014] <... futex resumed>) = 0 [pid 2033] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2032] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 2031] <... futex resumed>) = 0 [pid 2014] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2010] exit_group(0 [pid 412] <... ioctl resumed>) = 0 [pid 2033] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 2032] <... openat resumed>) = 5 [pid 2031] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2015] <... futex resumed>) = ? [pid 2014] <... futex resumed>) = ? [pid 2010] <... exit_group resumed>) = ? [pid 412] close(3 [pid 2035] <... open resumed>) = 4 [pid 2033] <... mount resumed>) = 0 [pid 2032] ioctl(5, LOOP_SET_FD, 3 [pid 2015] +++ exited with 0 +++ [pid 2014] +++ exited with 0 +++ [pid 2010] +++ exited with 0 +++ [pid 412] <... close resumed>) = 0 [pid 2035] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2034] <... write resumed>) = 1048576 [pid 2033] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2032] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2010, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 2034] munmap(0x7f6f98bca000, 1048576 [pid 2033] <... futex resumed>) = 1 [pid 2032] ioctl(5, LOOP_CLR_FD [pid 2031] <... futex resumed>) = 0 [pid 2034] <... munmap resumed>) = 0 [pid 2032] <... ioctl resumed>) = 0 [pid 2034] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 2031] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2033] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2034] <... openat resumed>) = 5 [pid 2034] ioctl(5, LOOP_SET_FD, 3 [pid 2032] ioctl(5, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 2032] close(5) = 0 [pid 2032] close(3) = 0 [pid 2032] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2032] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2034] <... ioctl resumed>) = 0 [pid 2034] close(3) = 0 [pid 2034] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 2034] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2030] <... futex resumed>) = 0 [pid 2035] <... futex resumed>) = 1 [pid 2030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2035] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 2030] <... futex resumed>) = 0 [pid 2035] <... mount resumed>) = 0 [pid 2030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2035] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2030] <... futex resumed>) = 0 [pid 2035] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2035] <... open resumed>) = 3 [pid 2030] <... futex resumed>) = 0 [pid 2030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2035] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2030] <... futex resumed>) = 0 [pid 2035] openat(-1, "/proc/self/exe", O_RDONLY [pid 2030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2035] <... openat resumed>) = 6 [pid 2030] <... futex resumed>) = 0 [pid 2035] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2035] <... futex resumed>) = 0 [pid 2030] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2035] sendfile(3, 6, NULL, 140737974943952 [pid 2030] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2030] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2038 attached [pid 2038] set_robust_list(0x5555564066e0, 24) = 0 [pid 2038] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2038] setpgid(0, 0) = 0 [pid 2038] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2038] write(3, "1000", 4) = 4 [pid 2038] close(3) = 0 [pid 2038] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2038] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2038] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2038] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2039], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2039 [pid 2038] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2038] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2031] <... futex resumed>) = 0 [pid 2031] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 2038 [pid 2033] <... open resumed>) = 3 ./strace-static-x86_64: Process 2039 attached [pid 2038] <... futex resumed>) = 0 [ 33.327258][ T2021] loop0: detected capacity change from 0 to 2048 [ 33.349210][ T2034] loop1: detected capacity change from 0 to 2048 [ 33.349491][ T2021] EXT4-fs (loop0): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 2039] set_robust_list(0x7f6fa100b9e0, 24 [pid 2038] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2033] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 1996] +++ exited with 0 +++ [pid 409] <... openat resumed>) = 3 [pid 2039] <... set_robust_list resumed>) = 0 [pid 2038] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2033] <... futex resumed>) = 1 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1996, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 2039] memfd_create("syzkaller", 0 [pid 2033] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2038] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2031] <... futex resumed>) = 0 [pid 409] ioctl(3, LOOP_CLR_FD [pid 2039] <... memfd_create resumed>) = 3 [pid 2038] <... mprotect resumed>) = 0 [pid 2031] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... ioctl resumed>) = 0 [pid 2032] <... futex resumed>) = 0 [pid 2038] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2031] <... futex resumed>) = 1 [pid 409] close(3 [pid 2039] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2032] openat(-1, "/proc/self/exe", O_RDONLY [pid 2031] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 409] <... close resumed>) = 0 [pid 2032] <... openat resumed>) = 5 [pid 2032] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2039] <... mmap resumed>) = 0x7f6f98bca000 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2038] <... clone resumed>, parent_tid=[2040], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2040 [pid 2032] <... futex resumed>) = 1 [pid 2031] <... futex resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 2035] <... sendfile resumed>) = 1048576 [pid 2032] sendfile(3, 5, NULL, 140737974943952 [pid 2031] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... openat resumed>) = 3 [pid 2038] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2035] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2030] <... futex resumed>) = 0 [pid 2035] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2039] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2031] <... futex resumed>) = 0 [pid 2031] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2038] <... futex resumed>) = 0 [pid 410] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 2041 attached ./strace-static-x86_64: Process 2040 attached [pid 2039] <... write resumed>) = 1048576 [pid 2038] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2032] <... sendfile resumed>) = 1048576 [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 2041 [pid 2039] munmap(0x7f6f98bca000, 1048576 [pid 2032] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] close(3 [pid 2032] <... futex resumed>) = 1 [pid 2031] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 2032] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2031] exit_group(0 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2033] <... futex resumed>) = ? [pid 2031] <... exit_group resumed>) = ? [pid 2033] +++ exited with 0 +++ [pid 2032] <... futex resumed>) = ? [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 2042 ./strace-static-x86_64: Process 2042 attached [pid 2042] set_robust_list(0x5555564066e0, 24) = 0 [pid 2039] <... munmap resumed>) = 0 [pid 2039] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2040] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2041] set_robust_list(0x5555564066e0, 24 [pid 2040] <... set_robust_list resumed>) = 0 [pid 2041] <... set_robust_list resumed>) = 0 [pid 2040] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2041] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2041] setpgid(0, 0) = 0 [pid 2040] <... open resumed>) = 5 [pid 2021] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2021] ioctl(7, LOOP_CLR_FD [pid 2041] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2040] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2041] <... openat resumed>) = 3 [pid 2040] <... futex resumed>) = 1 [pid 2038] <... futex resumed>) = 0 [pid 2040] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 2038] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2041] write(3, "1000", 4 [pid 2038] <... futex resumed>) = 0 [pid 2041] <... write resumed>) = 4 [pid 2038] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2041] close(3 [pid 2040] <... mount resumed>) = 0 [pid 2021] <... ioctl resumed>) = 0 [pid 2021] close(7) = 0 [pid 2021] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2021] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2042] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2013] exit_group(0 [pid 2029] <... futex resumed>) = ? [pid 2024] <... futex resumed>) = ? [pid 2013] <... exit_group resumed>) = ? [pid 2029] +++ exited with 0 +++ [pid 2024] +++ exited with 0 +++ [pid 2021] <... futex resumed>) = ? [pid 2042] <... prctl resumed>) = 0 [pid 2042] setpgid(0, 0) = 0 [pid 2042] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2042] write(3, "1000", 4 [pid 2041] <... close resumed>) = 0 [pid 2040] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2041] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2040] <... futex resumed>) = 1 [pid 2038] <... futex resumed>) = 0 [pid 2041] <... futex resumed>) = 0 [pid 2040] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2038] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2041] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2038] <... futex resumed>) = 0 [pid 2038] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2041] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2041] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2042] <... write resumed>) = 4 [pid 2042] close(3) = 0 [pid 2042] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2042] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2042] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2042] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2043], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2043 [pid 2042] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2042] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2042] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2042] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2042] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2044], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2044 [pid 2042] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2042] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2044 attached [pid 2044] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 2044] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 2043 attached [pid 2041] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2045 attached [pid 2043] set_robust_list(0x7f6fa100b9e0, 24 [pid 2034] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 2045] set_robust_list(0x7f6fa100b9e0, 24 [pid 2043] <... set_robust_list resumed>) = 0 [pid 2041] <... clone resumed>, parent_tid=[2045], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2045 [pid 2034] ioctl(5, LOOP_CLR_FD [pid 2041] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2041] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2041] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2041] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2045] <... set_robust_list resumed>) = 0 [pid 2043] memfd_create("syzkaller", 0 [pid 2041] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2034] <... ioctl resumed>) = 0 [pid 2021] +++ exited with 0 +++ [pid 2013] +++ exited with 0 +++ [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2013, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 2041] <... clone resumed>, parent_tid=[2046], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2046 [pid 2041] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 2041] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2034] close(5) = 0 [pid 2034] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2032] +++ exited with 0 +++ [pid 2031] +++ exited with 0 +++ [pid 407] <... openat resumed>) = 3 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2031, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 407] ioctl(3, LOOP_CLR_FD [pid 2030] exit_group(0 [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 2035] <... futex resumed>) = ? [pid 2030] <... exit_group resumed>) = ? [pid 407] close(3 [pid 2040] <... open resumed>) = 6 [pid 2039] <... openat resumed>) = 4 [pid 2035] +++ exited with 0 +++ [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 407] <... close resumed>) = 0 [pid 2040] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2039] ioctl(4, LOOP_SET_FD, 3 [pid 411] <... openat resumed>) = 3 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2040] <... futex resumed>) = 1 [pid 2038] <... futex resumed>) = 0 [ 33.369631][ T2021] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 33.394154][ T2034] EXT4-fs (loop1): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock [ 33.416042][ T2034] EXT4-fs (loop1): group descriptors corrupted! [pid 411] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 2047 [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 2048 [pid 2045] memfd_create("syzkaller", 0) = 3 [pid 2043] <... memfd_create resumed>) = 4 [pid 2045] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2040] openat(-1, "/proc/self/exe", O_RDONLY [pid 2038] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2040] <... openat resumed>) = 7 [pid 2038] <... futex resumed>) = 0 [pid 2040] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2038] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2040] <... futex resumed>) = 0 [pid 2038] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2040] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2038] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2044] <... open resumed>) = 3 [pid 2040] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2038] <... futex resumed>) = 0 [pid 2040] sendfile(6, 7, NULL, 140737974943952 [pid 2038] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2043] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2040] <... sendfile resumed>) = 1048576 [pid 2044] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2040] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2044] <... futex resumed>) = 1 [pid 2042] <... futex resumed>) = 0 [pid 2040] <... futex resumed>) = 1 [pid 2038] <... futex resumed>) = 0 [pid 2044] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 2042] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2040] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2044] <... mount resumed>) = 0 [pid 2042] <... futex resumed>) = 0 [pid 2039] <... ioctl resumed>) = 0 [pid 2042] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2047 attached [pid 2044] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2039] close(3./strace-static-x86_64: Process 2048 attached ./strace-static-x86_64: Process 2046 attached [pid 2047] set_robust_list(0x5555564066e0, 24 [pid 2044] <... futex resumed>) = 1 [pid 2042] <... futex resumed>) = 0 [pid 2039] <... close resumed>) = 0 [pid 2048] set_robust_list(0x5555564066e0, 24 [pid 2047] <... set_robust_list resumed>) = 0 [pid 2046] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2045] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2044] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2043] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2042] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2039] mkdir("./bus", 0777 [pid 2048] <... set_robust_list resumed>) = 0 [pid 2047] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2046] <... set_robust_list resumed>) = 0 [pid 2044] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2042] <... futex resumed>) = 0 [pid 2039] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2048] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2047] <... prctl resumed>) = 0 [pid 2046] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2044] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2042] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2039] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2048] <... prctl resumed>) = 0 [pid 2047] setpgid(0, 0 [pid 2046] <... open resumed>) = 4 [pid 2044] <... open resumed>) = 5 [pid 2044] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2043] <... write resumed>) = 1048576 [pid 2043] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2043] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 6 [pid 2043] ioctl(6, LOOP_SET_FD, 4 [pid 2048] setpgid(0, 0 [pid 2047] <... setpgid resumed>) = 0 [pid 2046] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2045] <... write resumed>) = 1048576 [pid 2044] <... futex resumed>) = 1 [pid 2042] <... futex resumed>) = 0 [pid 2039] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 2048] <... setpgid resumed>) = 0 [pid 2047] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2046] <... futex resumed>) = 1 [pid 2042] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2039] ioctl(4, LOOP_CLR_FD [pid 2048] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2047] <... openat resumed>) = 3 [pid 2046] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2042] <... futex resumed>) = 0 [pid 2039] <... ioctl resumed>) = 0 [pid 2042] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2039] close(4) = 0 [pid 2039] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2048] <... openat resumed>) = 3 [pid 2047] write(3, "1000", 4 [pid 2039] <... futex resumed>) = 0 [pid 2048] write(3, "1000", 4 [pid 2047] <... write resumed>) = 4 [pid 2039] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2038] exit_group(0 [pid 2048] <... write resumed>) = 4 [pid 2047] close(3 [pid 2040] <... futex resumed>) = ? [pid 2039] <... futex resumed>) = ? [pid 2038] <... exit_group resumed>) = ? [pid 2048] close(3 [pid 2047] <... close resumed>) = 0 [pid 2040] +++ exited with 0 +++ [pid 2039] +++ exited with 0 +++ [pid 2038] +++ exited with 0 +++ [pid 2041] <... futex resumed>) = 0 [pid 2048] <... close resumed>) = 0 [pid 2047] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2038, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 2048] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2047] <... futex resumed>) = 0 [pid 2045] munmap(0x7f6f98bca000, 1048576 [pid 2044] openat(-1, "/proc/self/exe", O_RDONLY [pid 2043] <... ioctl resumed>) = 0 [pid 2041] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2048] <... futex resumed>) = 0 [pid 2047] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2046] <... futex resumed>) = 0 [pid 2044] <... openat resumed>) = 7 [pid 2041] <... futex resumed>) = 1 [pid 2048] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2047] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2046] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 2044] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2041] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2048] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2047] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2046] <... mount resumed>) = 0 [pid 2044] <... futex resumed>) = 1 [pid 2042] <... futex resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 2048] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2047] <... mprotect resumed>) = 0 [pid 2046] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2042] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] ioctl(3, LOOP_CLR_FD [pid 2048] <... mprotect resumed>) = 0 [pid 2047] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2046] <... futex resumed>) = 1 [pid 2044] sendfile(5, 7, NULL, 140737974943952 [pid 2042] <... futex resumed>) = 0 [pid 2041] <... futex resumed>) = 0 [pid 412] <... ioctl resumed>) = 0 [pid 2048] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2046] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2042] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2041] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] close(3 [pid 2047] <... clone resumed>, parent_tid=[2049], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2049 [pid 2046] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2041] <... futex resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 2048] <... clone resumed>, parent_tid=[2050], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2050 [pid 2047] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2046] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2041] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2048] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2047] <... futex resumed>) = 0 [pid 2046] <... open resumed>) = 5 [pid 2048] <... futex resumed>) = 0 [pid 2047] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2046] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 2051 [pid 2048] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2047] <... futex resumed>) = 0 [pid 2048] <... futex resumed>) = 0 [pid 2047] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2046] <... futex resumed>) = 1 [pid 2041] <... futex resumed>) = 0 [pid 2048] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2047] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2046] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2041] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2048] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2047] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2046] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2041] <... futex resumed>) = 0 [pid 2048] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2047] <... mprotect resumed>) = 0 [pid 2046] openat(-1, "/proc/self/exe", O_RDONLY [pid 2041] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2048] <... mprotect resumed>) = 0 [pid 2047] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2046] <... openat resumed>) = 6 [pid 2048] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2046] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2047] <... clone resumed>, parent_tid=[2052], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2052 [pid 2048] <... clone resumed>, parent_tid=[2053], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2053 [pid 2047] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2046] <... futex resumed>) = 1 [pid 2041] <... futex resumed>) = 0 [pid 2048] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2047] <... futex resumed>) = 0 [pid 2046] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2044] <... sendfile resumed>) = 1048576 [pid 2041] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2048] <... futex resumed>) = 0 [pid 2047] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2046] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2045] <... munmap resumed>) = 0 [pid 2044] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2043] close(4 [pid 2041] <... futex resumed>) = 0 [pid 2048] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2046] sendfile(5, 6, NULL, 140737974943952 [pid 2045] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 2044] <... futex resumed>) = 1 [pid 2043] <... close resumed>) = 0 [pid 2042] <... futex resumed>) = 0 [pid 2041] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2046] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 2045] <... openat resumed>) = 7 [pid 2044] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2043] mkdir("./bus", 0777 [pid 2046] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2045] ioctl(7, LOOP_SET_FD, 3 [pid 2043] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2046] <... futex resumed>) = 1 [pid 2041] <... futex resumed>) = 0 [pid 2046] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2043] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue"./strace-static-x86_64: Process 2053 attached [pid 2053] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [ 33.430844][ T2039] loop5: detected capacity change from 0 to 2048 [ 33.456045][ T2039] EXT4-fs (loop5): VFS: Can't find ext4 filesystem [ 33.459432][ T2043] loop3: detected capacity change from 0 to 2048 [pid 2053] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000./strace-static-x86_64: Process 2052 attached [pid 2052] set_robust_list(0x7f6fa0fea9e0, 24) = 0 ./strace-static-x86_64: Process 2051 attached [pid 2052] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2051] set_robust_list(0x5555564066e0, 24) = 0 [pid 2051] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2051] setpgid(0, 0) = 0 ./strace-static-x86_64: Process 2049 attached [pid 2051] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2049] set_robust_list(0x7f6fa100b9e0, 24 [pid 2051] write(3, "1000", 4 [pid 2049] <... set_robust_list resumed>) = 0 [pid 2051] <... write resumed>) = 4 [pid 2049] memfd_create("syzkaller", 0 [pid 2051] close(3 [pid 2049] <... memfd_create resumed>) = 4 [pid 2051] <... close resumed>) = 0 [pid 2049] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2051] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2049] <... mmap resumed>) = 0x7f6f98bca000 [pid 2051] <... futex resumed>) = 0 [pid 2049] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2051] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2051] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2051] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2054], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2054 [pid 2051] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2051] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2051] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2051] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2051] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2055], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2055 [pid 2051] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2051] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2055 attached [pid 2055] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2034] +++ exited with 0 +++ [pid 2030] +++ exited with 0 +++ [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2030, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 408] close(3) = 0 ./strace-static-x86_64: Process 2050 attached [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2055] <... set_robust_list resumed>) = 0 [pid 2050] set_robust_list(0x7f6fa100b9e0, 24 [pid 2055] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2050] <... set_robust_list resumed>) = 0 [pid 2049] <... write resumed>) = 1048576 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 2056 ./strace-static-x86_64: Process 2054 attached [pid 2050] memfd_create("syzkaller", 0 [pid 2054] set_robust_list(0x7f6fa100b9e0, 24 [pid 2050] <... memfd_create resumed>) = 4 [pid 2054] <... set_robust_list resumed>) = 0 [pid 2050] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2054] memfd_create("syzkaller", 0 [pid 2050] <... mmap resumed>) = 0x7f6f98bca000 [pid 2054] <... memfd_create resumed>) = 4 [pid 2054] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 ./strace-static-x86_64: Process 2056 attached [pid 2054] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2050] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2049] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2049] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 [pid 2049] ioctl(5, LOOP_SET_FD, 4 [pid 2056] set_robust_list(0x5555564066e0, 24) = 0 [pid 2050] <... write resumed>) = 1048576 [pid 2056] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2043] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 2054] <... write resumed>) = 1048576 [pid 2054] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2054] openat(AT_FDCWD, "/dev/loop5", O_RDWR) = 5 [pid 2054] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 2054] ioctl(5, LOOP_CLR_FD) = 0 [pid 2049] <... ioctl resumed>) = 0 [pid 2049] close(4 [pid 2056] setpgid(0, 0 [pid 2043] ioctl(6, LOOP_CLR_FD [pid 2054] ioctl(5, LOOP_SET_FD, 4 [pid 2056] <... setpgid resumed>) = 0 [pid 2047] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 2047] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 2048] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 2047] <... futex resumed>) = 0 [pid 2048] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 2047] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2048] <... futex resumed>) = 0 [pid 2047] <... mmap resumed>) = 0x7f6f98ca9000 [pid 2048] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2047] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE [pid 2048] <... mmap resumed>) = 0x7f6f98ba9000 [pid 2047] <... mprotect resumed>) = 0 [pid 2056] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2054] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 2048] mprotect(0x7f6f98baa000, 131072, PROT_READ|PROT_WRITE [pid 2047] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2043] <... ioctl resumed>) = 0 [pid 2056] <... openat resumed>) = 3 [pid 2054] close(5 [pid 2048] <... mprotect resumed>) = 0 [pid 2054] <... close resumed>) = 0 [pid 2048] clone(child_stack=0x7f6f98bc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2047] <... clone resumed>, parent_tid=[2057], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 2057 [pid 2054] close(4 [pid 2047] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 2056] write(3, "1000", 4 [pid 2055] <... open resumed>) = 3 [pid 2054] <... close resumed>) = 0 [pid 2053] <... open resumed>) = 3 [pid 2052] <... open resumed>) = 3 [pid 2048] <... clone resumed>, parent_tid=[2058], tls=0x7f6f98bc9700, child_tidptr=0x7f6f98bc99d0) = 2058 [pid 2047] <... futex resumed>) = 0 [pid 2045] <... ioctl resumed>) = 0 [pid 2043] close(6 [pid 2055] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2053] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2052] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2048] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 2047] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2055] <... futex resumed>) = 1 [pid 2053] <... futex resumed>) = 0 [pid 2052] <... futex resumed>) = 0 [pid 2051] <... futex resumed>) = 0 [pid 2048] <... futex resumed>) = 0 [pid 2056] <... write resumed>) = 4 [pid 2055] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2053] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2052] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2051] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2048] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2043] <... close resumed>) = 0 [pid 2055] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2051] <... futex resumed>) = 0 [pid 2055] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 2054] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2051] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2055] <... mount resumed>) = 0 [pid 2054] <... futex resumed>) = 0 [pid 2049] <... close resumed>) = 0 [pid 2055] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2054] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2049] mkdir("./bus", 0777 [pid 2055] <... futex resumed>) = 1 [pid 2051] <... futex resumed>) = 0 [pid 2056] close(3 [pid 2049] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2055] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2051] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2045] close(3 [pid 2043] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2054] <... futex resumed>) = 0 [pid 2051] <... futex resumed>) = 1 [pid 2049] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2056] <... close resumed>) = 0 [pid 2054] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2051] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2042] exit_group(0 [pid 2056] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2054] <... open resumed>) = 4 [pid 2050] munmap(0x7f6f98bca000, 1048576 [pid 2045] <... close resumed>) = 0 [pid 2044] <... futex resumed>) = ? [pid 2043] <... futex resumed>) = ? [pid 2042] <... exit_group resumed>) = ? [pid 2056] <... futex resumed>) = 0 [pid 2054] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2044] +++ exited with 0 +++ [pid 2054] <... futex resumed>) = 1 [pid 2051] <... futex resumed>) = 0 [pid 2056] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2054] openat(-1, "/proc/self/exe", O_RDONLY [pid 2051] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2045] mkdir("./bus", 0777 [pid 2043] +++ exited with 0 +++ [pid 2042] +++ exited with 0 +++ ./strace-static-x86_64: Process 2058 attached [pid 2056] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2054] <... openat resumed>) = 5 [pid 2051] <... futex resumed>) = 0 [pid 2050] <... munmap resumed>) = 0 [pid 2045] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2058] set_robust_list(0x7f6f98bc99e0, 24 [pid 2056] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2054] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2051] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2042, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 2058] <... set_robust_list resumed>) = 0 [pid 2056] <... mprotect resumed>) = 0 [pid 2054] <... futex resumed>) = 0 [pid 2051] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2050] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 2045] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 410] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 2057 attached [pid 2058] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 2056] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2054] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2051] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... restart_syscall resumed>) = 0 [pid 2058] <... mount resumed>) = 0 [pid 2057] set_robust_list(0x7f6f98cc99e0, 24 [pid 2054] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2051] <... futex resumed>) = 0 [pid 2050] <... openat resumed>) = 5 [pid 2058] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 2057] <... set_robust_list resumed>) = 0 [pid 2054] sendfile(4, 5, NULL, 140737974943952 [pid 2051] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2058] <... futex resumed>) = 1 [pid 2057] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 2048] <... futex resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 2058] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2057] <... mount resumed>) = 0 [pid 2048] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... openat resumed>) = 3 [pid 2057] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 2053] <... futex resumed>) = 0 [pid 2048] <... futex resumed>) = 1 [pid 410] ioctl(3, LOOP_CLR_FD [pid 2057] <... futex resumed>) = 1 [pid 2056] <... clone resumed>, parent_tid=[2060], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2060 [pid 2053] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2048] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2047] <... futex resumed>) = 0 [pid 410] <... ioctl resumed>) = 0 [pid 2057] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2056] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2053] <... open resumed>) = 6 [pid 2047] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] close(3 [pid 2056] <... futex resumed>) = 0 [pid 2053] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2052] <... futex resumed>) = 0 [pid 2047] <... futex resumed>) = 1 [pid 410] <... close resumed>) = 0 [pid 2056] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2054] <... sendfile resumed>) = 1048576 [pid 2053] <... futex resumed>) = 1 [pid 2052] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2048] <... futex resumed>) = 0 [ 33.481326][ T2045] loop2: detected capacity change from 0 to 2048 [ 33.489037][ T2043] EXT4-fs (loop3): VFS: Can't find ext4 filesystem [ 33.512827][ T2049] loop0: detected capacity change from 0 to 2048 [pid 2047] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2056] <... futex resumed>) = 0 [pid 2054] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2053] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2052] <... open resumed>) = 4 [pid 2048] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2056] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2054] <... futex resumed>) = 1 [pid 2053] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2052] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2051] <... futex resumed>) = 0 [pid 2048] <... futex resumed>) = 0 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 2061 [pid 2056] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2054] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2053] openat(-1, "/proc/self/exe", O_RDONLY [pid 2052] <... futex resumed>) = 1 [pid 2051] exit_group(0 [pid 2050] ioctl(5, LOOP_SET_FD, 4 [pid 2048] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2047] <... futex resumed>) = 0 [pid 2056] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2055] <... futex resumed>) = ? [pid 2054] <... futex resumed>) = ? [pid 2053] <... openat resumed>) = 7 [pid 2052] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2051] <... exit_group resumed>) = ? [pid 2047] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2056] <... mprotect resumed>) = 0 [pid 2055] +++ exited with 0 +++ [pid 2054] +++ exited with 0 +++ [pid 2053] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2052] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2047] <... futex resumed>) = 0 [pid 2056] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2053] <... futex resumed>) = 1 [pid 2052] openat(-1, "/proc/self/exe", O_RDONLY [pid 2048] <... futex resumed>) = 0 [pid 2047] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2053] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2052] <... openat resumed>) = 6 [pid 2048] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2056] <... clone resumed>, parent_tid=[2063], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2063 [pid 2053] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2052] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2048] <... futex resumed>) = 0 ./strace-static-x86_64: Process 2060 attached [pid 2056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2053] sendfile(6, 7, NULL, 140737974943952 [pid 2052] <... futex resumed>) = 1 [pid 2048] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2047] <... futex resumed>) = 0 ./strace-static-x86_64: Process 2063 attached ./strace-static-x86_64: Process 2061 attached [pid 2060] set_robust_list(0x7f6fa100b9e0, 24 [pid 2056] <... futex resumed>) = 0 [pid 2053] <... sendfile resumed>) = 1048576 [pid 2052] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2050] <... ioctl resumed>) = 0 [pid 2047] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2061] set_robust_list(0x5555564066e0, 24 [pid 2053] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2052] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2047] <... futex resumed>) = 0 [pid 2061] <... set_robust_list resumed>) = 0 [pid 2053] <... futex resumed>) = 1 [pid 2052] sendfile(4, 6, NULL, 140737974943952 [pid 2048] <... futex resumed>) = 0 [pid 2047] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2061] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2053] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2052] <... sendfile resumed>) = 1048576 [pid 2061] <... prctl resumed>) = 0 [pid 2052] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2061] setpgid(0, 0 [pid 2052] <... futex resumed>) = 1 [pid 2047] <... futex resumed>) = 0 [pid 2061] <... setpgid resumed>) = 0 [pid 2052] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2061] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2061] write(3, "1000", 4) = 4 [pid 2060] <... set_robust_list resumed>) = 0 [pid 2063] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2061] close(3 [pid 2060] memfd_create("syzkaller", 0 [pid 2050] close(4 [pid 2060] <... memfd_create resumed>) = 3 [pid 2060] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2063] <... set_robust_list resumed>) = 0 [pid 2061] <... close resumed>) = 0 [pid 2060] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2050] <... close resumed>) = 0 [pid 2060] <... write resumed>) = 1048576 [pid 2060] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2063] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2061] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2060] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 2050] mkdir("./bus", 0777 [pid 2049] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 2063] <... open resumed>) = 4 [pid 2061] <... futex resumed>) = 0 [pid 2050] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2049] ioctl(5, LOOP_CLR_FD [pid 2063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2061] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2060] <... openat resumed>) = 5 [ 33.565652][ T2050] loop4: detected capacity change from 0 to 2048 [ 33.575337][ T2059] EXT4-fs warning (device loop0): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 33.596447][ T2049] EXT4-fs (loop0): get root inode failed [ 33.602204][ T2049] EXT4-fs (loop0): mount failed [pid 2050] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2049] <... ioctl resumed>) = 0 [pid 2063] <... futex resumed>) = 1 [pid 2061] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2060] ioctl(5, LOOP_SET_FD, 3 [pid 2056] <... futex resumed>) = 0 [pid 2051] +++ exited with 0 +++ [pid 2049] close(5 [pid 2063] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2061] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2049] <... close resumed>) = 0 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2051, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 2063] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2061] <... mprotect resumed>) = 0 [pid 2060] <... ioctl resumed>) = 0 [pid 2056] <... futex resumed>) = 0 [pid 2049] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2047] exit_group(0 [pid 412] restart_syscall(<... resuming interrupted clone ...> [pid 2063] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 2061] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2060] close(3 [pid 2057] <... futex resumed>) = ? [pid 2056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2052] <... futex resumed>) = ? [pid 2049] <... futex resumed>) = ? [pid 2047] <... exit_group resumed>) = ? [pid 2045] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 412] <... restart_syscall resumed>) = 0 [pid 2063] <... mount resumed>) = 0 [pid 2060] <... close resumed>) = 0 [pid 2057] +++ exited with 0 +++ [pid 2052] +++ exited with 0 +++ [pid 2049] +++ exited with 0 +++ [pid 2047] +++ exited with 0 +++ [pid 2045] ioctl(7, LOOP_CLR_FD [pid 2063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2061] <... clone resumed>, parent_tid=[2069], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2069 [pid 2060] mkdir("./bus", 0777 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2047, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 2063] <... futex resumed>) = 1 [pid 2061] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2060] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2056] <... futex resumed>) = 0 [pid 2045] <... ioctl resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 407] restart_syscall(<... resuming interrupted clone ...> [pid 2063] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2061] <... futex resumed>) = 0 [pid 2060] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2045] close(7 [pid 412] <... openat resumed>) = 3 [pid 407] <... restart_syscall resumed>) = 0 [pid 2063] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2061] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2056] <... futex resumed>) = 0 [pid 2045] <... close resumed>) = 0 [pid 412] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 2069 attached [pid 2063] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2061] <... futex resumed>) = 0 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [ 33.607401][ T2045] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 33.622193][ T2045] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 33.647640][ T2060] loop1: detected capacity change from 0 to 2048 [pid 2063] <... open resumed>) = 3 [pid 2061] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 412] close(3 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 2063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2061] <... mmap resumed>) = 0x7f6fa0fca000 [pid 412] <... close resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 2063] <... futex resumed>) = 0 [pid 2061] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] ioctl(3, LOOP_CLR_FD [pid 2063] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2061] <... mprotect resumed>) = 0 [pid 407] <... ioctl resumed>) = 0 [pid 2061] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 2071 [pid 407] close(3) = 0 [pid 2061] <... clone resumed>, parent_tid=[2072], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2072 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2061] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 2073 [pid 2061] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 2045] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2041] exit_group(0 [pid 2056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2046] <... futex resumed>) = ? [pid 2045] <... futex resumed>) = ? [pid 2041] <... exit_group resumed>) = ? [pid 2063] <... futex resumed>) = 0 [pid 2056] <... futex resumed>) = 1 [pid 2046] +++ exited with 0 +++ [pid 2063] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 2056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2069] set_robust_list(0x7f6fa100b9e0, 24 [pid 2063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2056] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) ./strace-static-x86_64: Process 2071 attached [pid 2063] <... futex resumed>) = 0 ./strace-static-x86_64: Process 2073 attached [pid 2071] set_robust_list(0x5555564066e0, 24 [pid 2063] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2072 attached [pid 2073] set_robust_list(0x5555564066e0, 24 [pid 2071] <... set_robust_list resumed>) = 0 [pid 2073] <... set_robust_list resumed>) = 0 [pid 2072] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2071] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2073] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2072] <... set_robust_list resumed>) = 0 [pid 2071] <... prctl resumed>) = 0 [pid 2073] <... prctl resumed>) = 0 [pid 2072] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2071] setpgid(0, 0 [pid 2073] setpgid(0, 0 [pid 2072] <... open resumed>) = 3 [pid 2071] <... setpgid resumed>) = 0 [pid 2073] <... setpgid resumed>) = 0 [pid 2072] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2071] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2073] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2072] <... futex resumed>) = 1 [pid 2071] <... openat resumed>) = 3 [pid 2069] <... set_robust_list resumed>) = 0 [pid 2061] <... futex resumed>) = 0 [pid 2056] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2073] <... openat resumed>) = 3 [pid 2072] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 2071] write(3, "1000", 4 [pid 2063] <... futex resumed>) = 0 [pid 2061] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2056] <... futex resumed>) = 1 [pid 2073] write(3, "1000", 4 [pid 2072] <... mount resumed>) = 0 [pid 2071] <... write resumed>) = 4 [pid 2069] memfd_create("syzkaller", 0 [pid 2063] sendfile(3, 6, NULL, 140737974943952 [pid 2061] <... futex resumed>) = 0 [pid 2069] <... memfd_create resumed>) = 4 [pid 2056] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2069] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2061] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2069] <... mmap resumed>) = 0x7f6f98bca000 [pid 2069] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2073] <... write resumed>) = 4 [pid 2072] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2071] close(3 [pid 2069] <... write resumed>) = 1048576 [pid 2063] <... sendfile resumed>) = 1048576 [pid 2069] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2069] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 2073] close(3) = 0 [pid 2073] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2073] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2073] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2073] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2076], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2076 [pid 2073] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2072] <... futex resumed>) = 1 [pid 2071] <... close resumed>) = 0 [pid 2063] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2061] <... futex resumed>) = 0 [pid 2073] <... futex resumed>) = 0 [pid 2073] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2073] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2073] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2073] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2077], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2077 [pid 2073] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2073] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2076 attached [pid 2072] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2071] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2063] <... futex resumed>) = 1 [pid 2061] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2072] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2056] <... futex resumed>) = 0 ./strace-static-x86_64: Process 2077 attached [pid 2072] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2071] <... futex resumed>) = 0 [pid 2063] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2061] <... futex resumed>) = 0 [pid 2077] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2076] set_robust_list(0x7f6fa100b9e0, 24 [pid 2071] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2061] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2050] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2077] <... set_robust_list resumed>) = 0 [pid 2076] <... set_robust_list resumed>) = 0 [pid 2071] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2060] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 2071] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2050] ioctl(5, LOOP_CLR_FD [pid 2077] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2076] memfd_create("syzkaller", 0 [pid 2072] <... open resumed>) = 6 [pid 2071] <... mprotect resumed>) = 0 [pid 2069] <... openat resumed>) = 5 [pid 2060] ioctl(5, LOOP_CLR_FD [pid 2045] +++ exited with 0 +++ [pid 2041] +++ exited with 0 +++ [ 33.671997][ T2050] EXT4-fs (loop4): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 33.688085][ T2050] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 33.706409][ T2060] EXT4-fs (loop1): get root inode failed [ 33.711961][ T2060] EXT4-fs (loop1): mount failed [pid 2072] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2071] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2069] ioctl(5, LOOP_SET_FD, 4./strace-static-x86_64: Process 2078 attached [pid 2076] <... memfd_create resumed>) = 4 [pid 2072] <... futex resumed>) = 1 [pid 2061] <... futex resumed>) = 0 [pid 2060] <... ioctl resumed>) = 0 [pid 2071] <... clone resumed>, parent_tid=[2078], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2078 [pid 2061] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2071] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2061] <... futex resumed>) = 0 [pid 2071] <... futex resumed>) = 0 [pid 2061] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2071] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2071] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2071] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2071] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2079], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2079 [pid 2071] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2071] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2078] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 2078] memfd_create("syzkaller", 0 [pid 2076] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2060] close(5) = 0 [pid 2060] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2078] <... memfd_create resumed>) = 3 [pid 2060] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2078] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2041, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 2072] openat(-1, "/proc/self/exe", O_RDONLY [pid 2078] <... mmap resumed>) = 0x7f6f98bca000 [pid 2072] <... openat resumed>) = 7 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 2072] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2056] exit_group(0 [pid 2063] <... futex resumed>) = ? [pid 2056] <... exit_group resumed>) = ? [pid 2063] +++ exited with 0 +++ [pid 2060] <... futex resumed>) = ? [pid 2072] <... futex resumed>) = 1 [pid 2061] <... futex resumed>) = 0 [pid 409] <... openat resumed>) = 3 [pid 2061] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] ioctl(3, LOOP_CLR_FD [pid 2072] sendfile(6, 7, NULL, 140737974943952 [pid 2061] <... futex resumed>) = 0 [pid 409] <... ioctl resumed>) = 0 [pid 2061] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2072] <... sendfile resumed>) = -1 EIO (Input/output error) [pid 409] close(3 [pid 2072] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... close resumed>) = 0 [pid 2072] <... futex resumed>) = 1 [pid 2061] <... futex resumed>) = 0 [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2072] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 2080 [pid 2060] +++ exited with 0 +++ [pid 2056] +++ exited with 0 +++ ./strace-static-x86_64: Process 2079 attached [pid 2077] <... open resumed>) = 3 [pid 2069] <... ioctl resumed>) = 0 [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2056, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 2077] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2073] <... futex resumed>) = 0 [pid 2077] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 2073] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2079] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2077] <... mount resumed>) = 0 [pid 2073] <... futex resumed>) = 0 [pid 2069] close(4 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 2077] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2073] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2079] <... set_robust_list resumed>) = 0 [pid 2077] <... futex resumed>) = 0 [pid 2073] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2069] <... close resumed>) = 0 [pid 408] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 2080 attached [pid 2079] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2078] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2077] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2076] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2073] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2069] mkdir("./bus", 0777 [pid 2080] set_robust_list(0x5555564066e0, 24 [pid 2079] <... open resumed>) = 4 [pid 2078] <... write resumed>) = 1048576 [pid 2077] <... open resumed>) = 5 [pid 2073] <... futex resumed>) = 0 [pid 2078] munmap(0x7f6f98bca000, 1048576 [pid 2077] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2073] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2078] <... munmap resumed>) = 0 [pid 2077] <... futex resumed>) = 0 [pid 2073] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2078] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2077] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2073] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2078] <... openat resumed>) = 5 [pid 2077] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2073] <... futex resumed>) = 0 [pid 2078] ioctl(5, LOOP_SET_FD, 3 [pid 2077] openat(-1, "/proc/self/exe", O_RDONLY [pid 2073] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2080] <... set_robust_list resumed>) = 0 [pid 2079] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2077] <... openat resumed>) = 6 [pid 2076] <... write resumed>) = 1048576 [pid 2069] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2080] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2079] <... futex resumed>) = 1 [pid 2076] munmap(0x7f6f98bca000, 1048576 [pid 2069] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 2080] <... prctl resumed>) = 0 [pid 2079] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2076] <... munmap resumed>) = 0 [pid 408] <... openat resumed>) = 3 [pid 2080] setpgid(0, 0 [pid 2076] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 408] ioctl(3, LOOP_CLR_FD [pid 2080] <... setpgid resumed>) = 0 [pid 2076] <... openat resumed>) = 7 [pid 408] <... ioctl resumed>) = 0 [pid 2080] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2077] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2076] ioctl(7, LOOP_SET_FD, 4 [pid 2071] <... futex resumed>) = 0 [pid 408] close(3 [pid 2080] <... openat resumed>) = 3 [pid 2077] <... futex resumed>) = 1 [pid 2076] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 2071] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 408] <... close resumed>) = 0 [pid 2080] write(3, "1000", 4 [pid 2076] ioctl(7, LOOP_CLR_FD [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2080] <... write resumed>) = 4 [pid 2079] <... futex resumed>) = 0 [pid 2077] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2076] <... ioctl resumed>) = 0 [pid 2071] <... futex resumed>) = 1 [pid 2050] <... ioctl resumed>) = 0 [pid 2080] close(3 [pid 2079] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 2071] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2050] close(5 [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 2081 [pid 2080] <... close resumed>) = 0 [pid 2079] <... mount resumed>) = 0 [pid 2050] <... close resumed>) = 0 [pid 2080] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2079] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2080] <... futex resumed>) = 0 [pid 2079] <... futex resumed>) = 1 [pid 2076] ioctl(7, LOOP_SET_FD, 4 [pid 2073] <... futex resumed>) = 0 [pid 2071] <... futex resumed>) = 0 [pid 2050] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2080] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2079] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2076] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 2073] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2071] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2050] <... futex resumed>) = 0 [pid 2048] exit_group(0 [pid 2080] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2079] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2078] <... ioctl resumed>) = 0 [pid 2077] <... futex resumed>) = 0 [pid 2076] close(7 [pid 2073] <... futex resumed>) = 1 [pid 2071] <... futex resumed>) = 0 [pid 2058] <... futex resumed>) = ? [pid 2053] <... futex resumed>) = ? [pid 2048] <... exit_group resumed>) = ? [pid 2080] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2079] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2078] close(3 [pid 2077] sendfile(5, 6, NULL, 140737974943952 [pid 2076] <... close resumed>) = 0 [pid 2073] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2071] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2058] +++ exited with 0 +++ [pid 2053] +++ exited with 0 +++ [pid 2080] <... mprotect resumed>) = 0 [pid 2076] close(4 [pid 2080] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2079] <... open resumed>) = 6 [pid 2076] <... close resumed>) = 0 [pid 2079] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2076] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2080] <... clone resumed>, parent_tid=[2083], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2083 [pid 2079] <... futex resumed>) = 1 [pid 2076] <... futex resumed>) = 0 [pid 2071] <... futex resumed>) = 0 [pid 2080] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2079] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2076] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2071] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2080] <... futex resumed>) = 0 [pid 2079] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2071] <... futex resumed>) = 0 [pid 2080] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2079] openat(-1, "/proc/self/exe", O_RDONLY [pid 2077] <... sendfile resumed>) = 1048576 [pid 2078] <... close resumed>) = 0 [pid 2071] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2080] <... futex resumed>) = 0 [pid 2079] <... openat resumed>) = 3 [pid 2078] mkdir("./bus", 0777 [pid 2077] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2080] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2079] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2078] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2077] <... futex resumed>) = 1 [pid 2073] <... futex resumed>) = 0 [pid 2080] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2079] <... futex resumed>) = 1 [pid 2078] mount("/dev/loop5", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2077] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2073] exit_group(0 [pid 2071] <... futex resumed>) = 0 [pid 2080] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2079] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2077] <... futex resumed>) = ? [pid 2076] <... futex resumed>) = ? [pid 2073] <... exit_group resumed>) = ? [pid 2071] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2080] <... mprotect resumed>) = 0 [pid 2079] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2077] +++ exited with 0 +++ [pid 2076] +++ exited with 0 +++ [pid 2071] <... futex resumed>) = 0 [pid 2080] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2079] sendfile(6, 3, NULL, 140737974943952 [pid 2073] +++ exited with 0 +++ [pid 2071] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2080] <... clone resumed>, parent_tid=[2085], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2085 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2073, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 2080] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 2080] <... futex resumed>) = 0 [pid 407] <... openat resumed>) = 3 [pid 2080] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 407] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] close(3) = 0 [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 2086 [ 33.725682][ T2069] loop3: detected capacity change from 0 to 2048 [ 33.759444][ T2078] loop5: detected capacity change from 0 to 2048 ./strace-static-x86_64: Process 2085 attached [pid 2079] <... sendfile resumed>) = 1048576 [pid 2085] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 2085] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 3 [pid 2085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2080] <... futex resumed>) = 0 [pid 2080] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2080] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2085] <... futex resumed>) = 1 [pid 2085] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 2086 attached ) = 0 [pid 2086] set_robust_list(0x5555564066e0, 24 [pid 2085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2086] <... set_robust_list resumed>) = 0 [pid 2085] <... futex resumed>) = 1 [pid 2080] <... futex resumed>) = 0 [pid 2086] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2085] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2080] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2086] <... prctl resumed>) = 0 [pid 2080] <... futex resumed>) = 0 [pid 2086] setpgid(0, 0 [pid 2080] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2086] <... setpgid resumed>) = 0 [pid 2086] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2086] write(3, "1000", 4) = 4 [pid 2086] close(3) = 0 [pid 2086] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2086] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2086] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2086] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2087], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2087 [pid 2086] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2086] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2086] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2050] +++ exited with 0 +++ [pid 2048] +++ exited with 0 +++ [pid 2079] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2086] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2085] <... open resumed>) = 4 [pid 2079] <... futex resumed>) = 1 [pid 2071] <... futex resumed>) = 0 [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2048, si_uid=0, si_status=0, si_utime=0, si_stime=7} --- ./strace-static-x86_64: Process 2081 attached [pid 2086] <... mprotect resumed>) = 0 [pid 2085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2079] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 411] restart_syscall(<... resuming interrupted clone ...> [pid 2086] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2085] <... futex resumed>) = 1 [pid 2081] set_robust_list(0x5555564066e0, 24 [pid 2080] <... futex resumed>) = 0 [pid 411] <... restart_syscall resumed>) = 0 [pid 2080] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2086] <... clone resumed>, parent_tid=[2088], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2088 [pid 2080] <... futex resumed>) = 0 [pid 2086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2085] openat(-1, "/proc/self/exe", O_RDONLY [pid 2080] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 2086] <... futex resumed>) = 0 [pid 2085] <... openat resumed>) = 5 [pid 2081] <... set_robust_list resumed>) = 0 [pid 411] <... openat resumed>) = 3 ./strace-static-x86_64: Process 2083 attached [pid 2086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2081] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 411] ioctl(3, LOOP_CLR_FD [pid 2085] <... futex resumed>) = 1 [pid 2083] set_robust_list(0x7f6fa100b9e0, 24 [pid 2081] <... prctl resumed>) = 0 [pid 2080] <... futex resumed>) = 0 [pid 411] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 2085] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2080] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 411] close(3 [pid 2085] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2083] <... set_robust_list resumed>) = 0 [pid 2081] setpgid(0, 0 [pid 2080] <... futex resumed>) = 0 [pid 411] <... close resumed>) = 0 [pid 2085] sendfile(4, 5, NULL, 140737974943952 [pid 2083] memfd_create("syzkaller", 0 [pid 2081] <... setpgid resumed>) = 0 [pid 2080] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2085] <... sendfile resumed>) = -1 ENOSPC (No space left on device) [pid 2083] <... memfd_create resumed>) = 6 [pid 2081] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 2087 attached [pid 2085] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2083] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2081] <... openat resumed>) = 3 [pid 411] <... clone resumed>, child_tidptr=0x5555564066d0) = 2089 [pid 2087] set_robust_list(0x7f6fa100b9e0, 24 [pid 2085] <... futex resumed>) = 1 [pid 2083] <... mmap resumed>) = 0x7f6f98bca000 [pid 2081] write(3, "1000", 4 [pid 2080] <... futex resumed>) = 0 [pid 2087] <... set_robust_list resumed>) = 0 [pid 2085] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2081] <... write resumed>) = 4 ./strace-static-x86_64: Process 2089 attached ./strace-static-x86_64: Process 2088 attached [pid 2087] memfd_create("syzkaller", 0 [pid 2083] write(6, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2081] close(3 [pid 2089] set_robust_list(0x5555564066e0, 24 [pid 2088] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2087] <... memfd_create resumed>) = 3 [pid 2078] <... mount resumed>) = -1 EINVAL (Invalid argument) [pid 2078] ioctl(5, LOOP_CLR_FD) = 0 [pid 2078] close(5 [pid 2083] <... write resumed>) = 1048576 [pid 2081] <... close resumed>) = 0 [pid 2088] <... set_robust_list resumed>) = 0 [pid 2087] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2088] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2087] <... mmap resumed>) = 0x7f6f98bca000 [pid 2081] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2078] <... close resumed>) = 0 [pid 2089] <... set_robust_list resumed>) = 0 [pid 2088] <... open resumed>) = 4 [pid 2087] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2083] munmap(0x7f6f98bca000, 1048576 [pid 2081] <... futex resumed>) = 0 [pid 2089] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2088] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2081] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2088] <... futex resumed>) = 1 [pid 2081] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2089] <... prctl resumed>) = 0 [pid 2088] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2086] <... futex resumed>) = 0 [pid 2081] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2089] setpgid(0, 0 [pid 2088] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2081] <... mprotect resumed>) = 0 [pid 2069] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2088] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 2081] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2069] ioctl(5, LOOP_CLR_FD [pid 2089] <... setpgid resumed>) = 0 [pid 2088] <... mount resumed>) = 0 [pid 2086] <... futex resumed>) = 0 [pid 2069] <... ioctl resumed>) = 0 [pid 2088] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2081] <... clone resumed>, parent_tid=[2090], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2090 [pid 2069] close(5 [pid 2088] <... futex resumed>) = 0 [pid 2081] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2088] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2081] <... futex resumed>) = 0 [pid 2069] <... close resumed>) = 0 [pid 2081] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2069] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2081] <... futex resumed>) = 0 [pid 2069] <... futex resumed>) = 0 [pid 2081] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2069] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2081] <... mmap resumed>) = 0x7f6fa0fca000 ./strace-static-x86_64: Process 2090 attached [pid 2089] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2087] <... write resumed>) = 1048576 [pid 2086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2083] <... munmap resumed>) = 0 [pid 2081] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2078] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2089] <... openat resumed>) = 3 [pid 2086] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2089] write(3, "1000", 4 [pid 2086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2089] <... write resumed>) = 4 [pid 2088] <... futex resumed>) = 0 [pid 2086] <... futex resumed>) = 1 [pid 2090] set_robust_list(0x7f6fa100b9e0, 24 [pid 2089] close(3 [pid 2088] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2087] munmap(0x7f6f98bca000, 1048576 [pid 2086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2083] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 2081] <... mprotect resumed>) = 0 [pid 2078] <... futex resumed>) = 0 [pid 2090] <... set_robust_list resumed>) = 0 [pid 2089] <... close resumed>) = 0 [pid 2088] <... open resumed>) = 5 [pid 2087] <... munmap resumed>) = 0 [pid 2083] <... openat resumed>) = 7 [pid 2081] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2078] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2071] exit_group(0 [pid 2061] exit_group(0 [pid 2090] memfd_create("syzkaller", 0 [pid 2089] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2088] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2087] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 2083] ioctl(7, LOOP_SET_FD, 6 [pid 2079] <... futex resumed>) = ? [pid 2078] <... futex resumed>) = ? [pid 2072] <... futex resumed>) = ? [pid 2071] <... exit_group resumed>) = ? [pid 2069] <... futex resumed>) = ? [pid 2061] <... exit_group resumed>) = ? [pid 2090] <... memfd_create resumed>) = 3 [pid 2089] <... futex resumed>) = 0 [pid 2088] <... futex resumed>) = 1 [pid 2086] <... futex resumed>) = 0 [pid 2072] +++ exited with 0 +++ [pid 2089] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2088] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2081] <... clone resumed>, parent_tid=[2091], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2091 [pid 2079] +++ exited with 0 +++ [pid 2069] +++ exited with 0 +++ [pid 2089] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2088] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 33.797560][ T2069] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 33.798342][ T2078] EXT4-fs warning (device loop5): read_mmp_block:107: Error -117 while reading MMP block 64 [ 33.832124][ T2069] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [pid 2086] <... futex resumed>) = 0 [pid 2081] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2089] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2088] openat(-1, "/proc/self/exe", O_RDONLY [pid 2086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2089] <... mprotect resumed>) = 0 [pid 2088] <... openat resumed>) = 6 [pid 2089] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2088] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2086] <... futex resumed>) = 0 [pid 2089] <... clone resumed>, parent_tid=[2092], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2092 [pid 2088] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2086] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2089] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2088] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2086] <... futex resumed>) = 0 [pid 2089] <... futex resumed>) = 0 [pid 2088] sendfile(5, 6, NULL, 140737974943952 [pid 2086] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2090] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2089] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2088] <... sendfile resumed>) = 1048576 [pid 2087] <... openat resumed>) = 7 [pid 2081] <... futex resumed>) = 0 [pid 2078] +++ exited with 0 +++ [pid 2071] +++ exited with 0 +++ [pid 2090] <... mmap resumed>) = 0x7f6f98bca000 [pid 2089] <... futex resumed>) = 0 [pid 2088] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2087] ioctl(7, LOOP_SET_FD, 3 [pid 2081] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2071, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 2089] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2088] <... futex resumed>) = 1 [pid 2087] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 2086] <... futex resumed>) = 0 [pid 2089] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2088] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2087] ioctl(7, LOOP_CLR_FD [pid 2089] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2087] <... ioctl resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2089] <... mprotect resumed>) = 0 [pid 412] <... openat resumed>) = 3 [pid 2089] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 412] ioctl(3, LOOP_CLR_FD [pid 2090] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 412] <... ioctl resumed>) = 0 [pid 2089] <... clone resumed>, parent_tid=[2093], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2093 [pid 412] close(3 [pid 2089] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2083] <... ioctl resumed>) = 0 [pid 412] <... close resumed>) = 0 [pid 2089] <... futex resumed>) = 0 [pid 2087] ioctl(7, LOOP_SET_FD, 3 [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2089] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 2094 ./strace-static-x86_64: Process 2092 attached [pid 2092] set_robust_list(0x7f6fa100b9e0, 24 [pid 2087] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 2083] close(6 [pid 2087] close(7) = 0 [pid 2083] <... close resumed>) = 0 [pid 2092] <... set_robust_list resumed>) = 0 [pid 2087] close(3 [pid 2092] memfd_create("syzkaller", 0) = 3 [pid 2092] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2087] <... close resumed>) = 0 [pid 2083] mkdir("./bus", 0777 [pid 2087] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2083] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2087] <... futex resumed>) = 0 [pid 2083] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2087] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2086] exit_group(0 [pid 2088] <... futex resumed>) = ? [pid 2087] <... futex resumed>) = ? [pid 2086] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 2093 attached [pid 2088] +++ exited with 0 +++ [pid 2087] +++ exited with 0 +++ ./strace-static-x86_64: Process 2091 attached [pid 2093] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 2091] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2090] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 2094 attached [pid 2094] set_robust_list(0x5555564066e0, 24) = 0 [pid 2094] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2093] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2091] <... set_robust_list resumed>) = 0 [pid 2090] munmap(0x7f6f98bca000, 1048576 [pid 2094] <... prctl resumed>) = 0 [pid 2091] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2094] setpgid(0, 0) = 0 [pid 2094] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2090] <... munmap resumed>) = 0 [pid 2094] <... openat resumed>) = 3 [pid 2092] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2090] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 2094] write(3, "1000", 4) = 4 [pid 2094] close(3) = 0 [pid 2094] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2094] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2094] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2094] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2097], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2097 [pid 2094] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2094] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2094] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2094] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2094] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2098], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2098 [pid 2094] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2094] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2092] <... write resumed>) = 1048576 [pid 2092] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2092] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 5 [ 33.865727][ T2083] loop2: detected capacity change from 0 to 2048 [ 33.897817][ T2083] EXT4-fs (loop2): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 2092] ioctl(5, LOOP_SET_FD, 3./strace-static-x86_64: Process 2098 attached ./strace-static-x86_64: Process 2097 attached ) = 0 [pid 2092] close(3) = 0 [pid 2092] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 2092] mount("/dev/loop4", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2098] set_robust_list(0x7f6fa0fea9e0, 24) = 0 [pid 2098] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2097] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 2097] memfd_create("syzkaller", 0) = 4 [pid 2097] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2097] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2093] <... open resumed>) = 4 [pid 2091] <... open resumed>) = 4 [pid 2086] +++ exited with 0 +++ [pid 2097] <... write resumed>) = 1048576 [pid 2097] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2097] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2061] +++ exited with 0 +++ [pid 2081] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 2097] <... openat resumed>) = 5 [pid 2097] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 2097] ioctl(5, LOOP_CLR_FD) = 0 [pid 2090] <... openat resumed>) = 5 [pid 2093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2091] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2090] ioctl(5, LOOP_SET_FD, 3 [pid 2081] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2061, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 2098] <... open resumed>) = 3 [pid 407] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2086, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 2097] ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) [pid 2097] close(5) = 0 [pid 2097] close(4 [pid 2098] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2097] <... close resumed>) = 0 [pid 2093] <... futex resumed>) = 1 [pid 2091] <... futex resumed>) = 0 [pid 2089] <... futex resumed>) = 0 [pid 2081] <... futex resumed>) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 2098] <... futex resumed>) = 1 [pid 2094] <... futex resumed>) = 0 [pid 2093] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2091] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2081] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 410] <... openat resumed>) = 3 [pid 407] <... openat resumed>) = 3 [pid 2097] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2089] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2094] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2089] <... futex resumed>) = 0 [pid 2098] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2094] <... futex resumed>) = 0 [pid 2093] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2081] <... mmap resumed>) = 0x7f6f98ca9000 [pid 410] ioctl(3, LOOP_CLR_FD [pid 407] ioctl(3, LOOP_CLR_FD [pid 2094] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2093] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 2089] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2081] mprotect(0x7f6f98caa000, 131072, PROT_READ|PROT_WRITE [pid 2083] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2083] ioctl(7, LOOP_CLR_FD) = 0 [pid 2083] close(7) = 0 [pid 2083] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2093] <... mount resumed>) = 0 [pid 2081] <... mprotect resumed>) = 0 [pid 2083] <... futex resumed>) = 0 [pid 2080] exit_group(0 [pid 2081] clone(child_stack=0x7f6f98cc92f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 410] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 407] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 2080] <... exit_group resumed>) = ? [pid 2093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2085] <... futex resumed>) = ? [pid 2085] +++ exited with 0 +++ [pid 410] close(3 [pid 407] close(3 [pid 2081] <... clone resumed>, parent_tid=[2100], tls=0x7f6f98cc9700, child_tidptr=0x7f6f98cc99d0) = 2100 [pid 2093] <... futex resumed>) = 1 [pid 2089] <... futex resumed>) = 0 [pid 410] <... close resumed>) = 0 [pid 407] <... close resumed>) = 0 [pid 2097] <... futex resumed>) = 1 [pid 2094] <... futex resumed>) = 0 [pid 2093] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2089] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2081] futex(0x7f6fa10e4708, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2094] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=42000000} [pid 2093] <... open resumed>) = 3 [pid 2089] <... futex resumed>) = 0 [pid 2081] <... futex resumed>) = 0 [pid 2081] futex(0x7f6fa10e470c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2089] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2097] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 2093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 410] <... clone resumed>, child_tidptr=0x5555564066d0) = 2101 [pid 407] <... clone resumed>, child_tidptr=0x5555564066d0) = 2102 [pid 2089] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2089] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2093] <... futex resumed>) = 0 [pid 2097] <... mount resumed>) = 0 [pid 2089] <... futex resumed>) = 0 [pid 2097] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2093] openat(-1, "/proc/self/exe", O_RDONLY [pid 2089] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2093] <... openat resumed>) = 6 [pid 2097] <... futex resumed>) = 1 [pid 2094] <... futex resumed>) = 0 [pid 2090] <... ioctl resumed>) = 0 [pid 2094] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2102 attached ./strace-static-x86_64: Process 2101 attached ./strace-static-x86_64: Process 2100 attached [pid 2097] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2094] <... futex resumed>) = 0 [pid 2090] close(3 [pid 2093] <... futex resumed>) = 1 [pid 2097] <... open resumed>) = 4 [pid 2094] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2090] <... close resumed>) = 0 [pid 2089] <... futex resumed>) = 0 [pid 2093] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2101] set_robust_list(0x5555564066e0, 24 [pid 2100] set_robust_list(0x7f6f98cc99e0, 24 [pid 2097] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2093] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2090] mkdir("./bus", 0777 [pid 2089] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2102] set_robust_list(0x5555564066e0, 24 [pid 2101] <... set_robust_list resumed>) = 0 [pid 2100] <... set_robust_list resumed>) = 0 [pid 2097] <... futex resumed>) = 1 [pid 2094] <... futex resumed>) = 0 [pid 2093] sendfile(3, 6, NULL, 140737974943952 [pid 2090] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2089] <... futex resumed>) = 0 [pid 2102] <... set_robust_list resumed>) = 0 [pid 2101] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2100] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 2097] openat(-1, "/proc/self/exe", O_RDONLY [pid 2094] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2090] mount("/dev/loop1", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2089] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2097] <... openat resumed>) = 5 [pid 2094] <... futex resumed>) = 0 [pid 2097] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2094] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2097] <... futex resumed>) = 0 [pid 2094] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2097] sendfile(4, 5, NULL, 140737974943952 [pid 2094] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2094] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2100] <... mount resumed>) = 0 [pid 2100] futex(0x7f6fa10e470c, FUTEX_WAKE_PRIVATE, 1000000 [pid 2081] <... futex resumed>) = 0 [pid 2081] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2091] <... futex resumed>) = 0 [pid 2081] <... futex resumed>) = 1 [pid 2091] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2081] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2091] <... open resumed>) = 3 [pid 2091] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2081] <... futex resumed>) = 0 [pid 2091] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2081] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2091] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2081] <... futex resumed>) = 0 [pid 2091] openat(-1, "/proc/self/exe", O_RDONLY [pid 2081] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2091] <... openat resumed>) = 6 [pid 2091] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2081] <... futex resumed>) = 0 [pid 2100] <... futex resumed>) = 1 [pid 2091] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2081] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2100] futex(0x7f6fa10e4708, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2091] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2081] <... futex resumed>) = 0 [pid 2091] sendfile(3, 6, NULL, 140737974943952 [pid 2081] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2101] <... prctl resumed>) = 0 [pid 2101] setpgid(0, 0) = 0 [pid 2101] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2101] write(3, "1000", 4) = 4 [pid 2101] close(3) = 0 [pid 2101] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2101] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2101] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2101] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2104], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2104 [pid 2102] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2101] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2102] <... prctl resumed>) = 0 [pid 2101] <... futex resumed>) = 0 [pid 2102] setpgid(0, 0 [pid 2101] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2102] <... setpgid resumed>) = 0 [pid 2101] <... futex resumed>) = 0 [pid 2102] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2101] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2102] <... openat resumed>) = 3 [pid 2101] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2102] write(3, "1000", 4 [pid 2101] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2102] <... write resumed>) = 4 [pid 2101] <... mprotect resumed>) = 0 [pid 2102] close(3 [ 33.908730][ T2092] loop4: detected capacity change from 0 to 2048 [ 33.911422][ T2083] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 33.937258][ T2090] loop1: detected capacity change from 0 to 2048 [ 33.949720][ T2092] EXT4-fs (loop4): Couldn't mount because of unsupported optional features (c0828) [pid 2101] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2102] <... close resumed>) = 0 [pid 2102] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2101] <... clone resumed>, parent_tid=[2105], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2105 [pid 2102] <... futex resumed>) = 0 [pid 2101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2102] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2101] <... futex resumed>) = 0 [pid 2102] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2102] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2102] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2106], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2106 ./strace-static-x86_64: Process 2104 attached ./strace-static-x86_64: Process 2105 attached [pid 2105] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2104] set_robust_list(0x7f6fa100b9e0, 24 [pid 2105] <... set_robust_list resumed>) = 0 [pid 2104] <... set_robust_list resumed>) = 0 [pid 2105] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2104] memfd_create("syzkaller", 0 [pid 2105] <... open resumed>) = 3 [pid 2104] <... memfd_create resumed>) = 4 [pid 2104] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2105] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2101] <... futex resumed>) = 0 [pid 2101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2105] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 2105] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2101] <... futex resumed>) = 0 [pid 2101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2105] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000) = 5 [pid 2105] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2101] <... futex resumed>) = 0 [pid 2101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2105] openat(-1, "/proc/self/exe", O_RDONLY) = 6 [pid 2104] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 2106 attached [pid 2106] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 2106] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2105] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2101] <... futex resumed>) = 0 [pid 2101] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2101] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2105] <... futex resumed>) = 1 [pid 2105] sendfile(5, 6, NULL, 140737974943952) = -1 ENOSPC (No space left on device) [pid 2105] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2101] <... futex resumed>) = 0 [pid 2105] <... futex resumed>) = 1 [pid 2105] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2104] <... write resumed>) = 1048576 [pid 2102] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2097] <... sendfile resumed>) = 1048576 [pid 2093] <... sendfile resumed>) = 1048576 [pid 2091] <... sendfile resumed>) = 1048576 [pid 2083] +++ exited with 0 +++ [pid 2080] +++ exited with 0 +++ [pid 2104] munmap(0x7f6f98bca000, 1048576) = 0 [pid 2104] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 7 [pid 2104] ioctl(7, LOOP_SET_FD, 4 [pid 2106] <... futex resumed>) = 0 [pid 2102] <... futex resumed>) = 1 [pid 2097] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2094] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 2093] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2091] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2090] <... mount resumed>) = -1 EUCLEAN (Structure needs cleaning) [pid 2089] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 409] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2080, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 2106] memfd_create("syzkaller", 0) = 3 [pid 2106] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98beb000 [ 33.959876][ T2092] EXT4-fs (loop4): Skipping orphan cleanup due to unknown ROCOMPAT features [ 33.973140][ T2090] EXT4-fs (loop1): ext4_check_descriptors: Block bitmap for group 0 not in group (block 34360603672)! [ 33.984730][ T2092] EXT4-fs (loop4): mounted filesystem without journal. Opts: ; grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [ 33.994457][ T2090] EXT4-fs (loop1): group descriptors corrupted! [ 34.003003][ T2104] loop3: detected capacity change from 0 to 2048 [pid 2106] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2102] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2097] <... futex resumed>) = 0 [pid 2094] exit_group(0 [pid 2093] <... futex resumed>) = 0 [pid 2091] <... futex resumed>) = 0 [pid 2090] ioctl(5, LOOP_CLR_FD [pid 2081] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 2102] <... futex resumed>) = 0 [pid 2098] <... futex resumed>) = ? [pid 2094] <... exit_group resumed>) = ? [pid 2093] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2091] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2090] <... ioctl resumed>) = 0 [pid 2102] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2098] +++ exited with 0 +++ [pid 2090] close(5 [pid 2102] <... mmap resumed>) = 0x7f6f98bca000 [pid 2090] <... close resumed>) = 0 [pid 2102] mprotect(0x7f6f98bcb000, 131072, PROT_READ|PROT_WRITE [pid 2090] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 2102] <... mprotect resumed>) = 0 [pid 2090] <... futex resumed>) = 0 [pid 2102] clone(child_stack=0x7f6f98bea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2090] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 409] <... openat resumed>) = 3 [pid 2081] exit_group(0) = ? [pid 2100] <... futex resumed>) = -1 (errno 18446744073709551555) [pid 2091] <... futex resumed>) = ? [pid 2100] +++ exited with 0 +++ [pid 2090] <... futex resumed>) = ? [pid 2091] +++ exited with 0 +++ [pid 2090] +++ exited with 0 +++ [pid 2081] +++ exited with 0 +++ [pid 2102] <... clone resumed>, parent_tid=[2107], tls=0x7f6f98bea700, child_tidptr=0x7f6f98bea9d0) = 2107 [pid 409] ioctl(3, LOOP_CLR_FD [pid 2102] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 409] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 2102] <... futex resumed>) = 0 [pid 409] close(3 [pid 2102] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 408] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2081, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 409] <... close resumed>) = 0 [pid 408] restart_syscall(<... resuming interrupted clone ...> [pid 409] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2106] <... write resumed>) = 1048576 [pid 408] <... restart_syscall resumed>) = 0 [pid 409] <... clone resumed>, child_tidptr=0x5555564066d0) = 2108 [pid 2106] munmap(0x7f6f98beb000, 1048576 [pid 408] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 408] ioctl(3, LOOP_CLR_FD) = 0 [pid 2106] <... munmap resumed>) = 0 [pid 2106] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 2106] ioctl(4, LOOP_SET_FD, 3 [pid 408] close(3 [pid 2104] <... ioctl resumed>) = 0 [pid 2104] close(4 [pid 408] <... close resumed>) = 0 ./strace-static-x86_64: Process 2107 attached ./strace-static-x86_64: Process 2108 attached [pid 408] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 2108] set_robust_list(0x5555564066e0, 24 [pid 2107] set_robust_list(0x7f6f98bea9e0, 24 [pid 2104] <... close resumed>) = 0 [pid 2104] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 2104] mount("/dev/loop3", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2092] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2092] ioctl(5, LOOP_CLR_FD) = 0 [pid 2092] close(5) = 0 [pid 2092] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2089] exit_group(0 [pid 2093] <... futex resumed>) = ? [pid 2089] <... exit_group resumed>) = ? [pid 2093] +++ exited with 0 +++ [pid 2092] <... futex resumed>) = ? [pid 408] <... clone resumed>, child_tidptr=0x5555564066d0) = 2109 ./strace-static-x86_64: Process 2109 attached [pid 2109] set_robust_list(0x5555564066e0, 24) = 0 [pid 2108] <... set_robust_list resumed>) = 0 [pid 2107] <... set_robust_list resumed>) = 0 [pid 2109] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2109] setpgid(0, 0) = 0 [pid 2108] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2107] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2109] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2108] <... prctl resumed>) = 0 [pid 2107] <... open resumed>) = 5 [pid 2106] <... ioctl resumed>) = 0 [pid 2108] setpgid(0, 0 [pid 2107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] <... setpgid resumed>) = 0 [pid 2106] close(3 [pid 2107] <... futex resumed>) = 1 [pid 2102] <... futex resumed>) = 0 [pid 2109] <... openat resumed>) = 3 [pid 2108] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2107] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2106] <... close resumed>) = 0 [pid 2102] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] <... openat resumed>) = 3 [pid 2107] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2102] <... futex resumed>) = 0 [pid 2108] write(3, "1000", 4 [pid 2107] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 2102] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2108] <... write resumed>) = 4 [pid 2107] <... mount resumed>) = 0 [pid 2108] close(3 [pid 2107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] <... close resumed>) = 0 [pid 2107] <... futex resumed>) = 1 [pid 2102] <... futex resumed>) = 0 [pid 2108] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2107] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2102] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] <... futex resumed>) = 0 [pid 2107] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2102] <... futex resumed>) = 0 [pid 2108] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2107] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2102] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2109] write(3, "1000", 4 [pid 2108] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2106] mkdir("./bus", 0777 [pid 2107] <... open resumed>) = 3 [pid 2108] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] <... mprotect resumed>) = 0 [pid 2106] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 2106] mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2109] <... write resumed>) = 4 [pid 2109] close(3) = 0 [pid 2109] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2109] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2109] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2109] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2112], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2112 [pid 2109] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2109] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2109] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2109] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2109] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2113], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2113 [pid 2109] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2109] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2112 attached [pid 2112] set_robust_list(0x7f6fa100b9e0, 24) = 0 [pid 2112] memfd_create("syzkaller", 0) = 3 [pid 2112] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f6f98bca000 [pid 2092] +++ exited with 0 +++ [pid 2089] +++ exited with 0 +++ [pid 411] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2089, si_uid=0, si_status=0, si_utime=0, si_stime=5} --- [pid 411] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 411] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 411] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 411] close(3) = 0 [pid 411] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555564066d0) = 2114 [pid 2112] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2107] <... futex resumed>) = 1 [ 34.006627][ T2092] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 34.027331][ T2106] loop0: detected capacity change from 0 to 2048 [ 34.042071][ T2104] EXT4-fs (loop3): mounted filesystem without journal. Opts: grpjquota=,nodelalloc,init_itable,,errors=continue. Quota mode: none. [pid 2107] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2108] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2102] <... futex resumed>) = 0 [pid 2097] +++ exited with 0 +++ [pid 2094] +++ exited with 0 +++ [pid 2102] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] <... clone resumed>, parent_tid=[2115], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2115 [pid 2107] <... futex resumed>) = 0 [pid 2102] <... futex resumed>) = 1 [pid 2108] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2107] openat(-1, "/proc/self/exe", O_RDONLY [pid 2102] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2108] <... futex resumed>) = 0 [pid 2108] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2107] <... openat resumed>) = 6 [pid 412] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2094, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 2108] <... futex resumed>) = 0 [pid 2107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2107] <... futex resumed>) = 1 [pid 2102] <... futex resumed>) = 0 [pid 2108] <... mmap resumed>) = 0x7f6fa0fca000 [pid 2107] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2102] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE [pid 2107] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2102] <... futex resumed>) = 0 [pid 2112] <... write resumed>) = 1048576 [pid 2108] <... mprotect resumed>) = 0 [pid 2107] sendfile(3, 6, NULL, 140737974943952 [pid 2102] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2108] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2112] munmap(0x7f6f98bca000, 1048576 [pid 412] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2108] <... clone resumed>, parent_tid=[2117], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2117 [pid 412] <... openat resumed>) = 3 [pid 2108] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2108] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2112] <... munmap resumed>) = 0 ./strace-static-x86_64: Process 2115 attached [pid 2112] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 412] ioctl(3, LOOP_CLR_FD [pid 2115] set_robust_list(0x7f6fa100b9e0, 24 [pid 2112] <... openat resumed>) = 4 [pid 412] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 2115] <... set_robust_list resumed>) = 0 [pid 2112] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 412] close(3) = 0 [pid 2115] memfd_create("syzkaller", 0 [pid 2112] ioctl(4, LOOP_CLR_FD [pid 412] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2117 attached ./strace-static-x86_64: Process 2114 attached ./strace-static-x86_64: Process 2113 attached [pid 2115] <... memfd_create resumed>) = 3 [pid 2112] <... ioctl resumed>) = 0 [pid 2117] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2115] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2114] set_robust_list(0x5555564066e0, 24 [pid 2113] set_robust_list(0x7f6fa0fea9e0, 24 [pid 412] <... clone resumed>, child_tidptr=0x5555564066d0) = 2118 [pid 2117] <... set_robust_list resumed>) = 0 [pid 2115] <... mmap resumed>) = 0x7f6f98bca000 [pid 2114] <... set_robust_list resumed>) = 0 [pid 2113] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 2118 attached [pid 2118] set_robust_list(0x5555564066e0, 24) = 0 [pid 2118] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 2118] setpgid(0, 0) = 0 [pid 2118] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 2118] write(3, "1000", 4) = 4 [pid 2118] close(3) = 0 [pid 2118] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2118] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0feb000 [pid 2118] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2118] clone(child_stack=0x7f6fa100b2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2120], tls=0x7f6fa100b700, child_tidptr=0x7f6fa100b9d0) = 2120 [pid 2118] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2118] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2118] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f6fa0fca000 [pid 2118] mprotect(0x7f6fa0fcb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 2118] clone(child_stack=0x7f6fa0fea2f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID [pid 2112] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 2112] close(4) = 0 [pid 2117] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2113] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2112] close(3 [pid 2117] <... open resumed>) = 4 [pid 2107] <... sendfile resumed>) = 1048576 [pid 2107] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 2102] <... futex resumed>) = 0 [pid 2107] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2104] <... mount resumed>) = -1 ENOTDIR (Not a directory) [pid 2104] ioctl(7, LOOP_CLR_FD [pid 2112] <... close resumed>) = 0 [pid 2113] <... open resumed>) = 3 [pid 2117] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2114] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 2104] <... ioctl resumed>) = 0 [pid 2104] close(7) = 0 [pid 2104] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2101] exit_group(0 [pid 2105] <... futex resumed>) = ? [pid 2101] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 2121 attached ./strace-static-x86_64: Process 2120 attached [pid 2117] <... futex resumed>) = 1 [pid 2115] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2114] <... prctl resumed>) = 0 [pid 2113] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2112] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2109] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 2108] <... futex resumed>) = 0 [pid 2105] +++ exited with 0 +++ [pid 2121] set_robust_list(0x7f6fa0fea9e0, 24 [pid 2120] set_robust_list(0x7f6fa100b9e0, 24 [pid 2118] <... clone resumed>, parent_tid=[2121], tls=0x7f6fa0fea700, child_tidptr=0x7f6fa0fea9d0) = 2121 [pid 2117] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2109] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2104] <... futex resumed>) = ? [pid 2109] <... futex resumed>) = 0 [pid 2109] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2121] <... set_robust_list resumed>) = 0 [pid 2120] <... set_robust_list resumed>) = 0 [pid 2118] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2117] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2115] <... write resumed>) = 1048576 [pid 2114] setpgid(0, 0 [pid 2113] <... futex resumed>) = 0 [pid 2112] <... futex resumed>) = 1 [pid 2109] <... futex resumed>) = 0 [pid 2108] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2121] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2120] memfd_create("syzkaller", 0 [pid 2118] <... futex resumed>) = 0 [pid 2117] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 2115] munmap(0x7f6f98bca000, 1048576 [pid 2114] <... setpgid resumed>) = 0 [pid 2113] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2112] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 2109] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=49000000} [pid 2108] <... futex resumed>) = 0 [pid 2121] <... open resumed>) = 3 [pid 2120] <... memfd_create resumed>) = 4 [pid 2118] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2117] <... mount resumed>) = 0 [pid 2115] <... munmap resumed>) = 0 [pid 2114] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 2112] <... mount resumed>) = 0 [pid 2108] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2121] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2120] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 2118] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2117] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2115] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 2114] <... openat resumed>) = 3 [pid 2112] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2108] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 2121] <... futex resumed>) = 0 [pid 2120] <... mmap resumed>) = 0x7f6f98bca000 [pid 2118] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2117] <... futex resumed>) = 0 [pid 2115] <... openat resumed>) = 5 [pid 2114] write(3, "1000", 4 [pid 2112] <... futex resumed>) = 1 [pid 2109] <... futex resumed>) = 0 [pid 2108] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2106] <... mount resumed>) = -1 ENOMEM (Cannot allocate memory) [pid 2121] mount("/dev/loop5", "./bus", NULL, MS_BIND, NULL [pid 2109] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 2109] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2118] <... futex resumed>) = 0 [pid 2118] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 34.057414][ T2104] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) [ 34.075686][ T2116] EXT4-fs warning (device loop0): kmmpd:162: kmmpd being stopped since MMP feature has been disabled. [ 34.093830][ T2106] EXT4-fs (loop0): get root inode failed [ 34.103473][ T2106] EXT4-fs (loop0): mount failed [pid 2117] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2115] ioctl(5, LOOP_SET_FD, 3 [pid 2121] <... mount resumed>) = 0 [pid 2120] write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 2114] <... write resumed>) = 4 [pid 2112] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME, 000 [pid 2108] <... futex resumed>) = 0 [pid 2106] ioctl(4, LOOP_CLR_FD [pid 2121] futex(0x7f6fa10e46fc, FUTEX_WAKE_PRIVATE, 1000000 [pid 2120] <... write resumed>) = 1048576 [pid 2114] close(3 [pid 2112] <... open resumed>) = 4 [pid 2108] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2106] <... ioctl resumed>) = 0 [pid 2121] <... futex resumed>) = 1 [pid 2120] munmap(0x7f6f98bca000, 1048576 [pid 2114] <... close resumed>) = 0 [pid 2112] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2106] close(4 [pid 2121] futex(0x7f6fa10e46f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2120] <... munmap resumed>) = 0 [pid 2114] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2112] <... futex resumed>) = 1 [pid 2106] <... close resumed>) = 0 [pid 2120] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 2114] <... futex resumed>) = 0 [pid 2112] futex(0x7f6fa10e46e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 2106] futex(0x7f6fa10e46ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 2120] <... openat resumed>) = 5 [pid 2114] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 2120] ioctl(5, LOOP_SET_FD, 4 [pid 2114] <... mmap resumed>) = 0x7f6fa0feb000 [pid 2106] <... futex resumed>) = 0 [pid 2118] <... futex resumed>) = 0 [pid 2114] mprotect(0x7f6fa0fec000, 131072, PROT_READ|PROT_WRITE [pid 2109] <... futex resumed>) = 0 [pid 2118] futex(0x7f6fa10e46f8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2109] futex(0x7f6fa10e46e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 2102] exit_group(0 [pid 2118] <... futex resumed>) = 1 [pid 2115] <... ioctl resumed>) = 0 [pid 2109] <... futex resumed>) = 1 [pid 2102] <... exit_group resumed>) = ? [pid 2118] futex(0x7f6fa10e46fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2115] close(3 [pid 2109] futex(0x7f6fa10e46ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 2115] <... close resumed>) = 0 [pid 2115] mkdir("./bus", 0777) = -1 EEXIST (File exists) [pid 2115] mount("/dev/loop2", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, "grpjquota=,nodelalloc,init_itable,,errors=continue" [pid 2106] +++ exited with 0 +++ [pid 2114] <... mprotect resumed>) = 0