./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor183034032 <...> Warning: Permanently added '10.128.0.235' (ED25519) to the list of known hosts. execve("./syz-executor183034032", ["./syz-executor183034032"], 0x7ffe425f7830 /* 10 vars */) = 0 brk(NULL) = 0x555556218000 brk(0x555556218d40) = 0x555556218d40 arch_prctl(ARCH_SET_FS, 0x5555562183c0) = 0 set_tid_address(0x555556218690) = 5041 set_robust_list(0x5555562186a0, 24) = 0 rseq(0x555556218ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor183034032", 4096) = 27 getrandom("\x34\xaa\x99\xed\xec\x63\x66\x71", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556218d40 brk(0x555556239d40) = 0x555556239d40 brk(0x55555623a000) = 0x55555623a000 mprotect(0x7f3dc913c000, 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 mkdir("./syzkaller.rrd4aj", 0700) = 0 chmod("./syzkaller.rrd4aj", 0777) = 0 chdir("./syzkaller.rrd4aj") = 0 mkdir("./0", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5042 attached , child_tidptr=0x555556218690) = 5042 [pid 5042] set_robust_list(0x5555562186a0, 24) = 0 [pid 5042] chdir("./0") = 0 [pid 5042] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5042] setpgid(0, 0) = 0 [pid 5042] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5042] write(3, "1000", 4) = 4 [pid 5042] close(3) = 0 [pid 5042] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5042] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5042] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5042] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5042] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5042] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5042] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5042] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5043]}, 88) = 5043 [pid 5042] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 ./strace-static-x86_64: Process 5043 attached [pid 5042] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5042] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5043] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5043] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5043] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5043] memfd_create("syzkaller", 0) = 3 [pid 5043] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5043] 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 5043] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5043] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5043] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5043] close(3) = 0 [pid 5043] mkdir("./file0", 0777) = 0 [pid 5043] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5043] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5043] chdir("./file0") = 0 [pid 5043] ioctl(4, LOOP_CLR_FD) = 0 [pid 5043] close(4) = 0 [pid 5043] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5043] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5042] <... futex resumed>) = 0 [pid 5042] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5042] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5043] <... futex resumed>) = 0 [pid 5043] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5043] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5042] <... futex resumed>) = 0 [pid 5043] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5042] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5043] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5042] <... futex resumed>) = 0 [pid 5043] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5042] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5043] <... open resumed>) = 5 [pid 5043] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5042] <... futex resumed>) = 0 [pid 5043] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5042] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5043] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5042] <... futex resumed>) = 0 [pid 5043] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5042] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5042] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5042] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5043] <... mmap resumed>) = 0x20000000 [pid 5043] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5042] <... mprotect resumed>) = 0 [pid 5043] <... futex resumed>) = 0 [pid 5043] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5042] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5042] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5045]}, 88) = 5045 [pid 5042] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5042] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5042] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5045 attached [pid 5045] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5045] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5045] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5045] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5043] <... futex resumed>) = ? [pid 5045] +++ killed by SIGBUS +++ [pid 5043] +++ killed by SIGBUS +++ [pid 5042] <... futex resumed>) = ? [pid 5042] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5042, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./0/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./0/binderfs") = 0 [ 71.755849][ T5043] syz-executor183[5043]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 71.785916][ T5043] loop0: detected capacity change from 0 to 2048 [ 71.797159][ T5043] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./0/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./0/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./0/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./0/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./0") = 0 mkdir("./1", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5046 attached , child_tidptr=0x555556218690) = 5046 [pid 5046] set_robust_list(0x5555562186a0, 24) = 0 [pid 5046] chdir("./1") = 0 [pid 5046] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5046] setpgid(0, 0) = 0 [pid 5046] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5046] write(3, "1000", 4) = 4 [pid 5046] close(3) = 0 [pid 5046] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5046] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5046] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5046] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5046] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5046] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5046] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5046] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5047 attached => {parent_tid=[5047]}, 88) = 5047 [pid 5047] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5047] set_robust_list(0x7f3dc90769a0, 24 [pid 5046] rt_sigprocmask(SIG_SETMASK, [], [pid 5047] <... set_robust_list resumed>) = 0 [pid 5046] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5047] rt_sigprocmask(SIG_SETMASK, [], [pid 5046] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5047] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5046] <... futex resumed>) = 0 [pid 5047] memfd_create("syzkaller", 0 [pid 5046] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5047] <... memfd_create resumed>) = 3 [pid 5047] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5047] 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 5047] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5047] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5047] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5047] close(3) = 0 [pid 5047] mkdir("./file0", 0777) = 0 [ 71.854989][ T5047] syz-executor183[5047]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 71.885761][ T5047] loop0: detected capacity change from 0 to 2048 [pid 5047] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5047] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5047] chdir("./file0") = 0 [pid 5047] ioctl(4, LOOP_CLR_FD) = 0 [pid 5047] close(4) = 0 [pid 5047] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5046] <... futex resumed>) = 0 [pid 5046] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5047] <... futex resumed>) = 1 [pid 5046] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5047] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5047] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5046] <... futex resumed>) = 0 [pid 5047] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5046] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5047] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5046] <... futex resumed>) = 0 [pid 5047] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5046] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5047] <... open resumed>) = 5 [pid 5047] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5046] <... futex resumed>) = 0 [pid 5046] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5046] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5047] <... futex resumed>) = 1 [pid 5046] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5047] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5046] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5047] <... mmap resumed>) = 0x20000000 [pid 5046] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5046] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5046] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5047] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5047] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5046] <... clone3 resumed> => {parent_tid=[5048]}, 88) = 5048 [pid 5046] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5048 attached [pid 5048] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5046] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5046] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5046] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5048] <... rseq resumed>) = 0 [pid 5048] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5048] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5048] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5047] <... futex resumed>) = ? [pid 5048] +++ killed by SIGBUS +++ [pid 5047] +++ killed by SIGBUS +++ [pid 5046] <... futex resumed>) = ? [pid 5046] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5046, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./1", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./1/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./1/binderfs") = 0 umount2("./1/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./1/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./1/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./1/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./1/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./1") = 0 mkdir("./2", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5049 attached , child_tidptr=0x555556218690) = 5049 [pid 5049] set_robust_list(0x5555562186a0, 24) = 0 [ 71.898848][ T5047] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5049] chdir("./2") = 0 [pid 5049] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5049] setpgid(0, 0) = 0 [pid 5049] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5049] write(3, "1000", 4) = 4 [pid 5049] close(3) = 0 [pid 5049] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5049] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5049] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5049] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5049] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5049] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5049] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5049] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5050 attached => {parent_tid=[5050]}, 88) = 5050 [pid 5049] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5049] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5049] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5050] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5050] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5050] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5050] memfd_create("syzkaller", 0) = 3 [pid 5050] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5050] 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 5050] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5050] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5050] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5050] close(3) = 0 [pid 5050] mkdir("./file0", 0777) = 0 [ 71.958610][ T5050] syz-executor183[5050]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 71.988785][ T5050] loop0: detected capacity change from 0 to 2048 [pid 5050] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5050] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5050] chdir("./file0") = 0 [pid 5050] ioctl(4, LOOP_CLR_FD) = 0 [pid 5050] close(4) = 0 [pid 5050] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5050] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5049] <... futex resumed>) = 0 [pid 5049] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5050] <... futex resumed>) = 0 [pid 5049] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5050] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5050] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5049] <... futex resumed>) = 0 [pid 5050] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5049] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5050] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5049] <... futex resumed>) = 0 [pid 5050] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5049] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5050] <... open resumed>) = 5 [pid 5050] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5049] <... futex resumed>) = 0 [pid 5050] <... futex resumed>) = 1 [pid 5049] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5050] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5049] <... futex resumed>) = 0 [pid 5049] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5049] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5050] <... mmap resumed>) = 0x20000000 [pid 5049] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5049] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5049] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5049] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5050] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 5051 attached [pid 5050] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5051] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5051] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5051] rt_sigprocmask(SIG_SETMASK, [], [pid 5049] <... clone3 resumed> => {parent_tid=[5051]}, 88) = 5051 [pid 5051] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5051] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5049] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5049] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5051] <... futex resumed>) = 0 [pid 5049] <... futex resumed>) = 1 [pid 5049] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5051] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5050] <... futex resumed>) = ? [pid 5049] <... futex resumed>) = ? [pid 5050] +++ killed by SIGBUS +++ [pid 5051] +++ killed by SIGBUS +++ [pid 5049] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5049, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./2", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./2/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./2/binderfs") = 0 [ 72.002393][ T5050] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./2/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./2/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./2/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./2/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./2/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./2/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./2") = 0 mkdir("./3", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5052 attached , child_tidptr=0x555556218690) = 5052 [pid 5052] set_robust_list(0x5555562186a0, 24) = 0 [pid 5052] chdir("./3") = 0 [pid 5052] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5052] setpgid(0, 0) = 0 [pid 5052] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5052] write(3, "1000", 4) = 4 [pid 5052] close(3) = 0 [pid 5052] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5052] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5052] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5052] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5052] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5052] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5052] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5052] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5053 attached [pid 5053] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5053] set_robust_list(0x7f3dc90769a0, 24 [pid 5052] <... clone3 resumed> => {parent_tid=[5053]}, 88) = 5053 [pid 5053] <... set_robust_list resumed>) = 0 [pid 5052] rt_sigprocmask(SIG_SETMASK, [], [pid 5053] rt_sigprocmask(SIG_SETMASK, [], [pid 5052] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5053] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5052] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5053] memfd_create("syzkaller", 0 [pid 5052] <... futex resumed>) = 0 [pid 5052] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5053] <... memfd_create resumed>) = 3 [pid 5053] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5053] 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 5053] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5053] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5053] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5053] close(3) = 0 [pid 5053] mkdir("./file0", 0777) = 0 [pid 5053] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5053] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5053] chdir("./file0") = 0 [pid 5053] ioctl(4, LOOP_CLR_FD) = 0 [pid 5053] close(4) = 0 [pid 5053] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5052] <... futex resumed>) = 0 [pid 5053] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5052] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5052] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5053] <... open resumed>) = 4 [pid 5053] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5053] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5052] <... futex resumed>) = 0 [pid 5052] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5053] <... futex resumed>) = 0 [pid 5052] <... futex resumed>) = 1 [pid 5052] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5053] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5053] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5052] <... futex resumed>) = 0 [pid 5052] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5053] <... futex resumed>) = 1 [pid 5052] <... futex resumed>) = 0 [pid 5053] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5052] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5052] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5053] <... mmap resumed>) = 0x20000000 [pid 5052] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5053] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5052] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5053] <... futex resumed>) = 0 [pid 5053] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5052] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5052] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5054]}, 88) = 5054 [pid 5052] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5052] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5052] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5054 attached [pid 5054] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5054] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5054] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5054] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5053] <... futex resumed>) = ? [pid 5053] +++ killed by SIGBUS +++ [pid 5052] <... futex resumed>) = ? [pid 5054] +++ killed by SIGBUS +++ [pid 5052] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5052, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./3", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 72.076585][ T5053] syz-executor183[5053]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 72.105880][ T5053] loop0: detected capacity change from 0 to 2048 [ 72.116839][ T5053] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./3", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./3/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./3/binderfs") = 0 umount2("./3/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./3/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./3/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./3/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./3/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./3/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./3") = 0 mkdir("./4", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5055 ./strace-static-x86_64: Process 5055 attached [pid 5055] set_robust_list(0x5555562186a0, 24) = 0 [pid 5055] chdir("./4") = 0 [pid 5055] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5055] setpgid(0, 0) = 0 [pid 5055] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5055] write(3, "1000", 4) = 4 [pid 5055] close(3) = 0 [pid 5055] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5055] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5055] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5055] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5055] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5055] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5055] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5055] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5056 attached [pid 5056] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5056] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5055] <... clone3 resumed> => {parent_tid=[5056]}, 88) = 5056 [pid 5056] rt_sigprocmask(SIG_SETMASK, [], [pid 5055] rt_sigprocmask(SIG_SETMASK, [], [pid 5056] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5055] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5055] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5055] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5056] memfd_create("syzkaller", 0) = 3 [pid 5056] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5056] 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 5056] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5056] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5056] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5056] close(3) = 0 [pid 5056] mkdir("./file0", 0777) = 0 [pid 5056] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5056] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5056] chdir("./file0") = 0 [pid 5056] ioctl(4, LOOP_CLR_FD) = 0 [pid 5056] close(4) = 0 [pid 5056] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5055] <... futex resumed>) = 0 [pid 5056] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5055] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5056] <... futex resumed>) = 0 [pid 5055] <... futex resumed>) = 1 [pid 5056] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5055] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5056] <... open resumed>) = 4 [pid 5056] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5055] <... futex resumed>) = 0 [pid 5056] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5055] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5056] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5055] <... futex resumed>) = 0 [pid 5056] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5055] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5056] <... open resumed>) = 5 [ 72.216168][ T5056] syz-executor183[5056]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 72.238594][ T5056] loop0: detected capacity change from 0 to 2048 [ 72.250118][ T5056] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5056] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5055] <... futex resumed>) = 0 [pid 5056] <... futex resumed>) = 1 [pid 5055] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5056] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5055] <... futex resumed>) = 0 [pid 5055] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5056] <... mmap resumed>) = 0x20000000 [pid 5055] <... futex resumed>) = 0 [pid 5056] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5055] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5056] <... futex resumed>) = 0 [pid 5055] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5056] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5055] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5055] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5055] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5057 attached [pid 5057] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5055] <... clone3 resumed> => {parent_tid=[5057]}, 88) = 5057 [pid 5055] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5055] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5057] <... rseq resumed>) = 0 [pid 5057] set_robust_list(0x7f3dc0d559a0, 24 [pid 5055] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5057] <... set_robust_list resumed>) = 0 [pid 5057] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5057] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5055] <... futex resumed>) = ? [pid 5057] +++ killed by SIGBUS +++ [pid 5056] <... futex resumed>) = ? [pid 5056] +++ killed by SIGBUS +++ [pid 5055] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5055, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./4", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./4/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./4/binderfs") = 0 umount2("./4/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./4/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./4/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./4/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./4/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./4/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./4") = 0 mkdir("./5", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5058 ./strace-static-x86_64: Process 5058 attached [pid 5058] set_robust_list(0x5555562186a0, 24) = 0 [pid 5058] chdir("./5") = 0 [pid 5058] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5058] setpgid(0, 0) = 0 [pid 5058] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "1000", 4) = 4 [pid 5058] close(3) = 0 [pid 5058] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5058] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5058] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5058] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5058] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5058] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5058] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5058] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5059 attached => {parent_tid=[5059]}, 88) = 5059 [pid 5059] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5059] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5059] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5059] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5058] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5058] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5059] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5058] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5059] memfd_create("syzkaller", 0) = 3 [pid 5059] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5059] 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 5059] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5059] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5059] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5059] close(3) = 0 [pid 5059] mkdir("./file0", 0777) = 0 [pid 5059] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5059] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5059] chdir("./file0") = 0 [pid 5059] ioctl(4, LOOP_CLR_FD) = 0 [pid 5059] close(4) = 0 [pid 5059] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5059] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5058] <... futex resumed>) = 0 [pid 5058] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5059] <... futex resumed>) = 0 [pid 5059] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5058] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5059] <... open resumed>) = 4 [pid 5059] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5058] <... futex resumed>) = 0 [pid 5058] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5058] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5059] <... futex resumed>) = 1 [pid 5059] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5059] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5058] <... futex resumed>) = 0 [pid 5058] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5058] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5059] <... futex resumed>) = 1 [pid 5058] <... futex resumed>) = 0 [pid 5058] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5059] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5058] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5059] <... mmap resumed>) = 0x20000000 [pid 5058] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5058] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5058] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5059] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5059] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5058] <... clone3 resumed> => {parent_tid=[5060]}, 88) = 5060 [pid 5058] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5058] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5058] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5060 attached [pid 5060] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5060] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5060] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5060] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5058] <... futex resumed>) = ? [pid 5059] <... futex resumed>) = ? [pid 5059] +++ killed by SIGBUS +++ [pid 5060] +++ killed by SIGBUS +++ [pid 5058] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5058, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./5", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 72.374399][ T5059] syz-executor183[5059]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 72.398057][ T5059] loop0: detected capacity change from 0 to 2048 [ 72.408810][ T5059] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./5", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./5/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./5/binderfs") = 0 umount2("./5/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./5/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./5/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./5/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./5/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./5/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./5") = 0 mkdir("./6", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5061 ./strace-static-x86_64: Process 5061 attached [pid 5061] set_robust_list(0x5555562186a0, 24) = 0 [pid 5061] chdir("./6") = 0 [pid 5061] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5061] setpgid(0, 0) = 0 [pid 5061] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "1000", 4) = 4 [pid 5061] close(3) = 0 [pid 5061] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5061] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5061] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5061] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5061] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5061] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5061] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5061] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5062 attached => {parent_tid=[5062]}, 88) = 5062 [pid 5061] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5061] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5061] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5062] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5062] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5062] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5062] memfd_create("syzkaller", 0) = 3 [pid 5062] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5062] 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 5062] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5062] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5062] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5062] close(3) = 0 [pid 5062] mkdir("./file0", 0777) = 0 [pid 5062] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5062] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5062] chdir("./file0") = 0 [pid 5062] ioctl(4, LOOP_CLR_FD) = 0 [pid 5062] close(4) = 0 [pid 5062] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5062] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5061] <... futex resumed>) = 0 [pid 5061] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5061] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5062] <... futex resumed>) = 0 [pid 5062] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5062] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5062] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5061] <... futex resumed>) = 0 [pid 5061] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5062] <... futex resumed>) = 0 [pid 5062] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5062] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5062] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5061] <... futex resumed>) = 1 [pid 5061] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5061] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5062] <... futex resumed>) = 0 [pid 5061] <... futex resumed>) = 1 [pid 5062] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5061] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5062] <... futex resumed>) = 0 [pid 5061] <... futex resumed>) = 0 [pid 5062] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5062] +++ killed by SIGBUS +++ [pid 5061] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5061, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./6", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./6/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./6/binderfs") = 0 umount2("./6/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./6/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./6/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./6/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./6/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./6/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./6") = 0 mkdir("./7", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5063 ./strace-static-x86_64: Process 5063 attached [pid 5063] set_robust_list(0x5555562186a0, 24) = 0 [ 72.500176][ T5062] syz-executor183[5062]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 72.524316][ T5062] loop0: detected capacity change from 0 to 2048 [ 72.536354][ T5062] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5063] chdir("./7") = 0 [pid 5063] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5063] setpgid(0, 0) = 0 [pid 5063] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "1000", 4) = 4 [pid 5063] close(3) = 0 [pid 5063] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5063] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5063] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5063] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5063] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5063] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5063] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5063] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5064 attached => {parent_tid=[5064]}, 88) = 5064 [pid 5063] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5063] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5063] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5064] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5064] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5064] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5064] memfd_create("syzkaller", 0) = 3 [pid 5064] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5064] 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 5064] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5064] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5064] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5064] close(3) = 0 [pid 5064] mkdir("./file0", 0777) = 0 [pid 5064] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5064] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5064] chdir("./file0") = 0 [pid 5064] ioctl(4, LOOP_CLR_FD) = 0 [pid 5064] close(4) = 0 [pid 5064] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5063] <... futex resumed>) = 0 [pid 5064] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5063] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5063] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5064] <... open resumed>) = 4 [pid 5064] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5063] <... futex resumed>) = 0 [pid 5064] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5063] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5063] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5064] <... futex resumed>) = 0 [pid 5064] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5064] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5063] <... futex resumed>) = 0 [pid 5064] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5063] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5064] <... mmap resumed>) = 0x20000000 [pid 5063] <... futex resumed>) = 0 [pid 5063] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5064] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5064] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5063] <... futex resumed>) = 0 [pid 5063] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5063] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5063] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5063] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5065 attached => {parent_tid=[5065]}, 88) = 5065 [pid 5065] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5063] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5063] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5065] set_robust_list(0x7f3dc0d559a0, 24 [pid 5063] <... futex resumed>) = 0 [pid 5065] <... set_robust_list resumed>) = 0 [pid 5063] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5065] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5065] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5064] <... futex resumed>) = ? [pid 5063] <... futex resumed>) = ? [pid 5064] +++ killed by SIGBUS +++ [pid 5065] +++ killed by SIGBUS +++ [pid 5063] +++ killed by SIGBUS +++ [ 72.606359][ T5064] syz-executor183[5064]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 72.635939][ T5064] loop0: detected capacity change from 0 to 2048 [ 72.647654][ T5064] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5063, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./7", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./7/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./7/binderfs") = 0 umount2("./7/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./7/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./7/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./7/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./7/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./7/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./7") = 0 mkdir("./8", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5066 attached , child_tidptr=0x555556218690) = 5066 [pid 5066] set_robust_list(0x5555562186a0, 24) = 0 [pid 5066] chdir("./8") = 0 [pid 5066] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5066] setpgid(0, 0) = 0 [pid 5066] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1000", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5066] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5066] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5066] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5066] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5066] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5066] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5066] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5067 attached => {parent_tid=[5067]}, 88) = 5067 [pid 5067] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5066] rt_sigprocmask(SIG_SETMASK, [], [pid 5067] set_robust_list(0x7f3dc90769a0, 24 [pid 5066] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5067] <... set_robust_list resumed>) = 0 [pid 5066] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5067] rt_sigprocmask(SIG_SETMASK, [], [pid 5066] <... futex resumed>) = 0 [pid 5066] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5067] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5067] memfd_create("syzkaller", 0) = 3 [pid 5067] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5067] 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 5067] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5067] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5067] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5067] close(3) = 0 [pid 5067] mkdir("./file0", 0777) = 0 [pid 5067] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5067] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5067] chdir("./file0") = 0 [pid 5067] ioctl(4, LOOP_CLR_FD) = 0 [pid 5067] close(4) = 0 [pid 5067] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5066] <... futex resumed>) = 0 [pid 5067] <... futex resumed>) = 1 [pid 5066] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5067] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5066] <... futex resumed>) = 0 [pid 5066] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5067] <... open resumed>) = 4 [pid 5067] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5067] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5066] <... futex resumed>) = 0 [pid 5066] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5067] <... futex resumed>) = 0 [pid 5067] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5067] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5066] <... futex resumed>) = 1 [pid 5067] <... futex resumed>) = 0 [pid 5066] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5067] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5066] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5066] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5067] <... futex resumed>) = 0 [pid 5066] <... futex resumed>) = 1 [pid 5067] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5066] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5067] <... mmap resumed>) = 0x20000000 [pid 5066] <... futex resumed>) = 0 [pid 5066] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5066] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5066] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5067] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5066] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5067] <... futex resumed>) = 0 [pid 5066] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5067] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5066] <... clone3 resumed> => {parent_tid=[5068]}, 88) = 5068 [pid 5066] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5066] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5066] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5068 attached [pid 5068] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5068] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5068] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5068] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5066] <... futex resumed>) = ? [pid 5067] <... futex resumed>) = ? [pid 5067] +++ killed by SIGBUS +++ [pid 5068] +++ killed by SIGBUS +++ [pid 5066] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5066, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./8", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./8/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./8/binderfs") = 0 [ 72.718500][ T5067] syz-executor183[5067]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 72.742533][ T5067] loop0: detected capacity change from 0 to 2048 [ 72.755092][ T5067] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./8/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./8/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./8/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./8/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./8/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./8/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./8") = 0 mkdir("./9", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5069 attached , child_tidptr=0x555556218690) = 5069 [pid 5069] set_robust_list(0x5555562186a0, 24) = 0 [pid 5069] chdir("./9") = 0 [pid 5069] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5069] setpgid(0, 0) = 0 [pid 5069] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5069] write(3, "1000", 4) = 4 [pid 5069] close(3) = 0 [pid 5069] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5069] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5069] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5069] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5069] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5069] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5069] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5069] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5070]}, 88) = 5070 ./strace-static-x86_64: Process 5070 attached [pid 5069] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5069] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5069] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5070] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5070] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5070] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5070] memfd_create("syzkaller", 0) = 3 [pid 5070] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5070] 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 5070] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5070] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5070] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5070] close(3) = 0 [pid 5070] mkdir("./file0", 0777) = 0 [pid 5070] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5070] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5070] chdir("./file0") = 0 [pid 5070] ioctl(4, LOOP_CLR_FD) = 0 [pid 5070] close(4) = 0 [pid 5070] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5070] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5069] <... futex resumed>) = 0 [pid 5069] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5070] <... futex resumed>) = 0 [pid 5069] <... futex resumed>) = 1 [pid 5070] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5069] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5070] <... open resumed>) = 4 [pid 5070] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5070] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5069] <... futex resumed>) = 0 [pid 5070] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5069] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5070] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5069] <... futex resumed>) = 0 [pid 5070] <... open resumed>) = 5 [pid 5069] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5070] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5070] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5069] <... futex resumed>) = 0 [pid 5070] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5069] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5070] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5069] <... futex resumed>) = 0 [pid 5070] <... mmap resumed>) = 0x20000000 [pid 5069] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5070] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5069] <... futex resumed>) = 0 [pid 5070] <... futex resumed>) = 0 [pid 5069] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5070] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5069] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5069] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5069] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5069] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5071 attached => {parent_tid=[5071]}, 88) = 5071 [pid 5071] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5069] rt_sigprocmask(SIG_SETMASK, [], [pid 5071] <... rseq resumed>) = 0 [pid 5069] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5071] set_robust_list(0x7f3dc0d559a0, 24 [pid 5069] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5071] <... set_robust_list resumed>) = 0 [pid 5069] <... futex resumed>) = 0 [pid 5071] rt_sigprocmask(SIG_SETMASK, [], [pid 5069] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5071] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5071] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5070] <... futex resumed>) = ? [pid 5069] <... futex resumed>) = ? [pid 5070] +++ killed by SIGBUS +++ [pid 5071] +++ killed by SIGBUS +++ [pid 5069] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5069, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./9", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./9/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./9/binderfs") = 0 umount2("./9/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 [ 72.837787][ T5070] syz-executor183[5070]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 72.860634][ T5070] loop0: detected capacity change from 0 to 2048 [ 72.874288][ T5070] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./9/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./9/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./9/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./9/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./9/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./9") = 0 mkdir("./10", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5072 ./strace-static-x86_64: Process 5072 attached [pid 5072] set_robust_list(0x5555562186a0, 24) = 0 [pid 5072] chdir("./10") = 0 [pid 5072] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5072] setpgid(0, 0) = 0 [pid 5072] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5072] write(3, "1000", 4) = 4 [pid 5072] close(3) = 0 [pid 5072] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5072] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5072] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5072] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5072] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5072] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5072] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5072] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5073]}, 88) = 5073 [pid 5072] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5072] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5072] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5073 attached [pid 5073] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5073] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5073] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5073] memfd_create("syzkaller", 0) = 3 [pid 5073] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5073] 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 5073] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5073] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5073] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5073] close(3) = 0 [pid 5073] mkdir("./file0", 0777) = 0 [pid 5073] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5073] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5073] chdir("./file0") = 0 [pid 5073] ioctl(4, LOOP_CLR_FD) = 0 [pid 5073] close(4) = 0 [pid 5073] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5072] <... futex resumed>) = 0 [pid 5073] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5072] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5073] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5073] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5072] <... futex resumed>) = 0 [pid 5072] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5073] <... open resumed>) = 4 [pid 5073] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5072] <... futex resumed>) = 0 [pid 5072] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5073] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5072] <... futex resumed>) = 0 [pid 5072] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5073] <... open resumed>) = 5 [pid 5073] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5073] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5072] <... futex resumed>) = 0 [pid 5072] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5073] <... futex resumed>) = 0 [pid 5072] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5073] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5072] <... futex resumed>) = 0 [pid 5072] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5073] <... mmap resumed>) = 0x20000000 [pid 5073] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5073] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5072] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5072] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5072] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5072] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5074 attached [pid 5074] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5072] <... clone3 resumed> => {parent_tid=[5074]}, 88) = 5074 [pid 5074] <... rseq resumed>) = 0 [pid 5072] rt_sigprocmask(SIG_SETMASK, [], [pid 5074] set_robust_list(0x7f3dc0d559a0, 24 [pid 5072] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5074] <... set_robust_list resumed>) = 0 [pid 5072] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5074] rt_sigprocmask(SIG_SETMASK, [], [pid 5072] <... futex resumed>) = 0 [pid 5074] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5072] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5074] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5073] <... futex resumed>) = ? [pid 5072] <... futex resumed>) = ? [pid 5074] +++ killed by SIGBUS +++ [pid 5073] +++ killed by SIGBUS +++ [pid 5072] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5072, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./10", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./10/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./10/binderfs") = 0 [ 72.974261][ T5073] loop0: detected capacity change from 0 to 2048 [ 72.985234][ T5073] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./10/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./10/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./10/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./10/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./10/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./10/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./10") = 0 mkdir("./11", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5075 ./strace-static-x86_64: Process 5075 attached [pid 5075] set_robust_list(0x5555562186a0, 24) = 0 [pid 5075] chdir("./11") = 0 [pid 5075] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5075] setpgid(0, 0) = 0 [pid 5075] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "1000", 4) = 4 [pid 5075] close(3) = 0 [pid 5075] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5075] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5075] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5075] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5075] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5075] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5075] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5075] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5076 attached [pid 5076] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5076] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5076] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5076] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5075] <... clone3 resumed> => {parent_tid=[5076]}, 88) = 5076 [pid 5075] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5075] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5076] <... futex resumed>) = 0 [pid 5075] <... futex resumed>) = 1 [pid 5075] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5076] memfd_create("syzkaller", 0) = 3 [pid 5076] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5076] 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 5076] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5076] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5076] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5076] close(3) = 0 [pid 5076] mkdir("./file0", 0777) = 0 [pid 5076] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5076] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5076] chdir("./file0") = 0 [pid 5076] ioctl(4, LOOP_CLR_FD) = 0 [pid 5076] close(4) = 0 [pid 5076] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5076] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5075] <... futex resumed>) = 0 [pid 5075] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5076] <... futex resumed>) = 0 [pid 5075] <... futex resumed>) = 1 [pid 5076] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5075] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5076] <... open resumed>) = 4 [pid 5076] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5075] <... futex resumed>) = 0 [pid 5076] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5075] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5076] <... futex resumed>) = 0 [pid 5075] <... futex resumed>) = 1 [pid 5076] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5075] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5076] <... open resumed>) = 5 [pid 5076] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5075] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5076] <... futex resumed>) = 0 [pid 5076] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5075] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5076] <... futex resumed>) = 0 [pid 5075] <... futex resumed>) = 1 [pid 5075] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5076] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5075] <... futex resumed>) = 0 [pid 5076] <... mmap resumed>) = 0x20000000 [pid 5075] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5076] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5076] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5075] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5075] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5075] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5075] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5077 attached [pid 5077] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5075] <... clone3 resumed> => {parent_tid=[5077]}, 88) = 5077 [pid 5075] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5077] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5077] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5077] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5075] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5077] <... futex resumed>) = 0 [pid 5075] <... futex resumed>) = 1 [pid 5077] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5075] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5076] <... futex resumed>) = ? [pid 5076] +++ killed by SIGBUS +++ [pid 5077] +++ killed by SIGBUS +++ [pid 5075] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5075, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./11", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./11/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./11/binderfs") = 0 umount2("./11/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./11/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./11/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./11/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./11/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./11/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 [ 73.094767][ T5076] loop0: detected capacity change from 0 to 2048 [ 73.106285][ T5076] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./11") = 0 mkdir("./12", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5078 attached [pid 5078] set_robust_list(0x5555562186a0, 24) = 0 [pid 5078] chdir("./12" [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5078 [pid 5078] <... chdir resumed>) = 0 [pid 5078] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5078] setpgid(0, 0) = 0 [pid 5078] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5078] write(3, "1000", 4) = 4 [pid 5078] close(3) = 0 [pid 5078] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5078] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5078] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5078] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5078] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5078] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5078] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5078] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5079 attached => {parent_tid=[5079]}, 88) = 5079 [pid 5079] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5078] rt_sigprocmask(SIG_SETMASK, [], [pid 5079] <... rseq resumed>) = 0 [pid 5078] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5079] set_robust_list(0x7f3dc90769a0, 24 [pid 5078] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5079] <... set_robust_list resumed>) = 0 [pid 5078] <... futex resumed>) = 0 [pid 5079] rt_sigprocmask(SIG_SETMASK, [], [pid 5078] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5079] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5079] memfd_create("syzkaller", 0) = 3 [pid 5079] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5079] 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 5079] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5079] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5079] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5079] close(3) = 0 [pid 5079] mkdir("./file0", 0777) = 0 [pid 5079] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5079] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5079] chdir("./file0") = 0 [pid 5079] ioctl(4, LOOP_CLR_FD) = 0 [pid 5079] close(4) = 0 [pid 5079] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5078] <... futex resumed>) = 0 [pid 5079] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5078] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5078] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5079] <... open resumed>) = 4 [pid 5079] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5078] <... futex resumed>) = 0 [pid 5079] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5078] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5079] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5079] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5078] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5079] <... open resumed>) = 5 [pid 5079] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5078] <... futex resumed>) = 0 [pid 5079] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5078] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5079] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5078] <... futex resumed>) = 0 [pid 5078] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5079] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5078] <... futex resumed>) = 0 [pid 5079] <... mmap resumed>) = 0x20000000 [pid 5078] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5078] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5079] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5079] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5078] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5078] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5080]}, 88) = 5080 [pid 5078] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5078] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5078] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5080 attached [pid 5080] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5080] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5080] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5080] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5078] <... futex resumed>) = ? [pid 5079] <... futex resumed>) = ? [pid 5080] +++ killed by SIGBUS +++ [pid 5079] +++ killed by SIGBUS +++ [pid 5078] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5078, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./12", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./12/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./12/binderfs") = 0 [ 73.207573][ T5079] loop0: detected capacity change from 0 to 2048 [ 73.218971][ T5079] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./12/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./12/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./12/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./12/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./12/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./12/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./12") = 0 mkdir("./13", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5081 ./strace-static-x86_64: Process 5081 attached [pid 5081] set_robust_list(0x5555562186a0, 24) = 0 [pid 5081] chdir("./13") = 0 [pid 5081] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5081] setpgid(0, 0) = 0 [pid 5081] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5081] write(3, "1000", 4) = 4 [pid 5081] close(3) = 0 [pid 5081] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5081] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5081] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5081] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5081] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5081] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5081] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5081] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5082]}, 88) = 5082 ./strace-static-x86_64: Process 5082 attached [pid 5081] rt_sigprocmask(SIG_SETMASK, [], [pid 5082] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5081] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5082] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5081] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5082] rt_sigprocmask(SIG_SETMASK, [], [pid 5081] <... futex resumed>) = 0 [pid 5082] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5081] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5082] memfd_create("syzkaller", 0) = 3 [pid 5082] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5082] 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 5082] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5082] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5082] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5082] close(3) = 0 [pid 5082] mkdir("./file0", 0777) = 0 [pid 5082] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5082] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5082] chdir("./file0") = 0 [pid 5082] ioctl(4, LOOP_CLR_FD) = 0 [pid 5082] close(4) = 0 [pid 5082] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5082] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5081] <... futex resumed>) = 0 [pid 5081] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5082] <... futex resumed>) = 0 [pid 5082] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5081] <... futex resumed>) = 1 [pid 5081] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5082] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5081] <... futex resumed>) = 0 [pid 5081] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5081] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5082] <... futex resumed>) = 1 [pid 5082] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5082] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5081] <... futex resumed>) = 0 [pid 5081] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5081] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5082] <... futex resumed>) = 1 [pid 5081] <... futex resumed>) = 0 [pid 5081] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5082] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5081] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5082] <... mmap resumed>) = 0x20000000 [pid 5081] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5081] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5081] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5083 attached [pid 5082] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5082] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5081] <... clone3 resumed> => {parent_tid=[5083]}, 88) = 5083 [pid 5081] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5081] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5081] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5083] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5083] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5083] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5083] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5081] <... futex resumed>) = ? [pid 5082] <... futex resumed>) = ? [pid 5082] +++ killed by SIGBUS +++ [pid 5083] +++ killed by SIGBUS +++ [pid 5081] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5081, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./13", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./13/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./13/binderfs") = 0 [ 73.332341][ T5082] loop0: detected capacity change from 0 to 2048 [ 73.344363][ T5082] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./13/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./13/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./13/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./13/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./13/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./13/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./13") = 0 mkdir("./14", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5084 attached , child_tidptr=0x555556218690) = 5084 [pid 5084] set_robust_list(0x5555562186a0, 24) = 0 [pid 5084] chdir("./14") = 0 [pid 5084] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5084] setpgid(0, 0) = 0 [pid 5084] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5084] write(3, "1000", 4) = 4 [pid 5084] close(3) = 0 [pid 5084] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5084] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5084] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5084] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5084] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5084] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5084] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5084] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5085]}, 88) = 5085 ./strace-static-x86_64: Process 5085 attached [pid 5084] rt_sigprocmask(SIG_SETMASK, [], [pid 5085] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5084] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5085] set_robust_list(0x7f3dc90769a0, 24 [pid 5084] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5085] <... set_robust_list resumed>) = 0 [pid 5084] <... futex resumed>) = 0 [pid 5085] rt_sigprocmask(SIG_SETMASK, [], [pid 5084] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5085] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5085] memfd_create("syzkaller", 0) = 3 [pid 5085] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5085] 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 5085] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5085] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5085] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5085] close(3) = 0 [pid 5085] mkdir("./file0", 0777) = 0 [pid 5085] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5085] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5085] chdir("./file0") = 0 [pid 5085] ioctl(4, LOOP_CLR_FD) = 0 [pid 5085] close(4) = 0 [pid 5085] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5085] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5084] <... futex resumed>) = 0 [pid 5084] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5084] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5085] <... futex resumed>) = 0 [pid 5085] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5085] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5085] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5084] <... futex resumed>) = 0 [pid 5084] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5085] <... futex resumed>) = 0 [pid 5084] <... futex resumed>) = 1 [pid 5085] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5084] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5085] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5084] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5085] <... futex resumed>) = 0 [pid 5084] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5085] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1<) = 0 [pid 5084] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5084] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5085] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5084] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5085] <... futex resumed>) = 0 [pid 5085] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5084] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5084] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5084] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5086 attached => {parent_tid=[5086]}, 88) = 5086 [pid 5084] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5084] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5084] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5086] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5086] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5086] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5086] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5084] <... futex resumed>) = ? [pid 5086] +++ killed by SIGBUS +++ [pid 5085] <... futex resumed>) = ? [pid 5085] +++ killed by SIGBUS +++ [pid 5084] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5084, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./14", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 73.458564][ T5085] loop0: detected capacity change from 0 to 2048 [ 73.470498][ T5085] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./14", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./14/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./14/binderfs") = 0 umount2("./14/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./14/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./14/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./14/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./14/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./14/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./14") = 0 mkdir("./15", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5087 attached , child_tidptr=0x555556218690) = 5087 [pid 5087] set_robust_list(0x5555562186a0, 24) = 0 [pid 5087] chdir("./15") = 0 [pid 5087] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5087] setpgid(0, 0) = 0 [pid 5087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5087] write(3, "1000", 4) = 4 [pid 5087] close(3) = 0 [pid 5087] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5087] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5087] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5087] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5087] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5087] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5087] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5087] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5088]}, 88) = 5088 [pid 5087] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5087] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5087] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5088 attached [pid 5088] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5088] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5088] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5088] memfd_create("syzkaller", 0) = 3 [pid 5088] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5088] 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 5088] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5088] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5088] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5088] close(3) = 0 [pid 5088] mkdir("./file0", 0777) = 0 [pid 5088] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5088] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5088] chdir("./file0") = 0 [pid 5088] ioctl(4, LOOP_CLR_FD) = 0 [pid 5088] close(4) = 0 [pid 5088] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5088] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5087] <... futex resumed>) = 0 [pid 5087] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5088] <... futex resumed>) = 0 [pid 5088] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5087] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5088] <... open resumed>) = 4 [pid 5088] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5087] <... futex resumed>) = 0 [pid 5087] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5087] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5088] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5088] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5087] <... futex resumed>) = 0 [pid 5087] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5087] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5087] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5087] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5087] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5088] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5087] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5088] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 5089 attached [pid 5087] <... clone3 resumed> => {parent_tid=[5089]}, 88) = 5089 [pid 5087] rt_sigprocmask(SIG_SETMASK, [], [pid 5089] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5087] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5089] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5087] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5089] rt_sigprocmask(SIG_SETMASK, [], [pid 5087] <... futex resumed>) = 0 [pid 5087] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5089] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5088] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5088] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5089] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5088] <... futex resumed>) = ? [pid 5088] +++ killed by SIGBUS +++ [pid 5089] +++ killed by SIGBUS +++ [pid 5087] <... futex resumed>) = ? [pid 5087] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5087, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./15", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./15/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./15/binderfs") = 0 umount2("./15/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./15/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./15/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./15/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./15/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 [ 73.592184][ T5088] loop0: detected capacity change from 0 to 2048 [ 73.604967][ T5088] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./15/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./15") = 0 mkdir("./16", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5090 ./strace-static-x86_64: Process 5090 attached [pid 5090] set_robust_list(0x5555562186a0, 24) = 0 [pid 5090] chdir("./16") = 0 [pid 5090] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5090] setpgid(0, 0) = 0 [pid 5090] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5090] write(3, "1000", 4) = 4 [pid 5090] close(3) = 0 [pid 5090] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5090] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5090] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5090] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5090] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5090] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5090] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5090] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5091 attached [pid 5091] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5090] <... clone3 resumed> => {parent_tid=[5091]}, 88) = 5091 [pid 5091] <... rseq resumed>) = 0 [pid 5091] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5090] rt_sigprocmask(SIG_SETMASK, [], [pid 5091] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5090] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5090] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5090] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5091] memfd_create("syzkaller", 0) = 3 [pid 5091] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5091] 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 5091] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5091] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5091] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5091] close(3) = 0 [pid 5091] mkdir("./file0", 0777) = 0 [pid 5091] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5091] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5091] chdir("./file0") = 0 [pid 5091] ioctl(4, LOOP_CLR_FD) = 0 [pid 5091] close(4) = 0 [pid 5091] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5091] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5090] <... futex resumed>) = 0 [pid 5090] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5091] <... futex resumed>) = 0 [pid 5090] <... futex resumed>) = 1 [pid 5091] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5090] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5091] <... open resumed>) = 4 [pid 5091] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5090] <... futex resumed>) = 0 [pid 5091] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5090] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5091] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5090] <... futex resumed>) = 0 [pid 5091] <... open resumed>) = 5 [pid 5091] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5090] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5091] <... futex resumed>) = 0 [pid 5091] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5090] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5090] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5091] <... futex resumed>) = 0 [pid 5090] <... futex resumed>) = 1 [pid 5091] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5090] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5091] <... mmap resumed>) = 0x20000000 [pid 5090] <... futex resumed>) = 0 [pid 5091] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5090] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5091] <... futex resumed>) = 0 [pid 5091] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5090] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5090] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5090] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5090] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5092 attached => {parent_tid=[5092]}, 88) = 5092 [pid 5092] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5092] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5090] rt_sigprocmask(SIG_SETMASK, [], [pid 5092] rt_sigprocmask(SIG_SETMASK, [], [pid 5090] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5092] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5092] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5090] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5090] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5091] <... futex resumed>) = ? [pid 5091] +++ killed by SIGBUS +++ [pid 5090] <... futex resumed>) = ? [pid 5092] +++ killed by SIGBUS +++ [pid 5090] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5090, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./16", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./16/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./16/binderfs") = 0 umount2("./16/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./16/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./16/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./16/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./16/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./16/file0") = 0 [ 73.703100][ T5091] loop0: detected capacity change from 0 to 2048 [ 73.715449][ T5091] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./16") = 0 mkdir("./17", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5093 attached , child_tidptr=0x555556218690) = 5093 [pid 5093] set_robust_list(0x5555562186a0, 24) = 0 [pid 5093] chdir("./17") = 0 [pid 5093] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5093] setpgid(0, 0) = 0 [pid 5093] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5093] write(3, "1000", 4) = 4 [pid 5093] close(3) = 0 [pid 5093] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5093] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5093] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5093] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5093] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5093] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5093] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5094]}, 88) = 5094 [pid 5093] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5093] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5094 attached [pid 5094] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5094] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5094] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5094] memfd_create("syzkaller", 0) = 3 [pid 5094] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5094] 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 5094] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5094] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5094] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5094] close(3) = 0 [pid 5094] mkdir("./file0", 0777) = 0 [pid 5094] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5094] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5094] chdir("./file0") = 0 [pid 5094] ioctl(4, LOOP_CLR_FD) = 0 [pid 5094] close(4) = 0 [pid 5094] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5093] <... futex resumed>) = 0 [pid 5093] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5094] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5093] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5094] <... open resumed>) = 4 [pid 5094] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5093] <... futex resumed>) = 0 [pid 5094] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5093] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5094] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5093] <... futex resumed>) = 0 [pid 5094] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5093] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5094] <... open resumed>) = 5 [pid 5094] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5093] <... futex resumed>) = 0 [pid 5094] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5093] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5094] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5093] <... futex resumed>) = 0 [pid 5094] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5093] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5094] <... mmap resumed>) = 0x20000000 [pid 5094] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5094] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5093] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5093] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5093] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5095]}, 88) = 5095 [pid 5093] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5093] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5093] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5095 attached [pid 5095] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5095] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5095] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5095] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5094] <... futex resumed>) = ? [pid 5093] <... futex resumed>) = ? [pid 5094] +++ killed by SIGBUS +++ [pid 5095] +++ killed by SIGBUS +++ [pid 5093] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5093, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./17", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./17/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./17/binderfs") = 0 umount2("./17/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./17/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./17/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 73.787065][ T5094] loop0: detected capacity change from 0 to 2048 [ 73.801224][ T5094] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./17/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./17/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./17/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./17") = 0 mkdir("./18", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5096 attached [pid 5096] set_robust_list(0x5555562186a0, 24 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5096 [pid 5096] <... set_robust_list resumed>) = 0 [pid 5096] chdir("./18") = 0 [pid 5096] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5096] setpgid(0, 0) = 0 [pid 5096] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5096] write(3, "1000", 4) = 4 [pid 5096] close(3) = 0 [pid 5096] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5096] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5096] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5096] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5096] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5096] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5096] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5096] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5097]}, 88) = 5097 [pid 5096] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5096] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5096] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5097 attached [pid 5097] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5097] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5097] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5097] memfd_create("syzkaller", 0) = 3 [pid 5097] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5097] 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 5097] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5097] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5097] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5097] close(3) = 0 [pid 5097] mkdir("./file0", 0777) = 0 [pid 5097] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5097] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5097] chdir("./file0") = 0 [pid 5097] ioctl(4, LOOP_CLR_FD) = 0 [pid 5097] close(4) = 0 [pid 5097] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5096] <... futex resumed>) = 0 [pid 5096] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5096] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5097] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5097] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5097] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5096] <... futex resumed>) = 0 [pid 5096] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5097] <... futex resumed>) = 0 [pid 5096] <... futex resumed>) = 1 [pid 5097] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5096] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5097] <... open resumed>) = 5 [pid 5097] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5096] <... futex resumed>) = 0 [pid 5097] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5096] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5097] <... futex resumed>) = 0 [pid 5096] <... futex resumed>) = 1 [pid 5096] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5097] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5096] <... futex resumed>) = 0 [pid 5096] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5097] <... mmap resumed>) = 0x20000000 [pid 5097] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5096] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5097] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5096] <... mprotect resumed>) = 0 [pid 5096] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5096] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5098 attached [pid 5098] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5096] <... clone3 resumed> => {parent_tid=[5098]}, 88) = 5098 [pid 5098] <... rseq resumed>) = 0 [pid 5096] rt_sigprocmask(SIG_SETMASK, [], [pid 5098] set_robust_list(0x7f3dc0d559a0, 24 [pid 5096] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5098] <... set_robust_list resumed>) = 0 [pid 5096] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5098] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5096] <... futex resumed>) = 0 [pid 5098] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5096] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5097] <... futex resumed>) = ? [pid 5098] +++ killed by SIGBUS +++ [pid 5097] +++ killed by SIGBUS +++ [pid 5096] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5096, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./18", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./18/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./18/binderfs") = 0 [ 73.885911][ T5097] loop0: detected capacity change from 0 to 2048 [ 73.898620][ T5097] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./18/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./18/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./18/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./18/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./18/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./18/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./18") = 0 mkdir("./19", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5099 attached , child_tidptr=0x555556218690) = 5099 [pid 5099] set_robust_list(0x5555562186a0, 24) = 0 [pid 5099] chdir("./19") = 0 [pid 5099] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5099] setpgid(0, 0) = 0 [pid 5099] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5099] write(3, "1000", 4) = 4 [pid 5099] close(3) = 0 [pid 5099] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5099] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5099] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5099] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5099] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5099] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5099] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5099] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5100 attached [pid 5100] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5099] <... clone3 resumed> => {parent_tid=[5100]}, 88) = 5100 [pid 5100] <... rseq resumed>) = 0 [pid 5100] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5100] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5100] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5099] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5099] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5100] <... futex resumed>) = 0 [pid 5099] <... futex resumed>) = 1 [pid 5099] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5100] memfd_create("syzkaller", 0) = 3 [pid 5100] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5100] 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 5100] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5100] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5100] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5100] close(3) = 0 [pid 5100] mkdir("./file0", 0777) = 0 [pid 5100] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5100] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5100] chdir("./file0") = 0 [pid 5100] ioctl(4, LOOP_CLR_FD) = 0 [pid 5100] close(4) = 0 [pid 5100] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5099] <... futex resumed>) = 0 [pid 5100] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5099] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5100] <... futex resumed>) = 0 [pid 5099] <... futex resumed>) = 1 [pid 5100] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5099] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5100] <... open resumed>) = 4 [pid 5100] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5099] <... futex resumed>) = 0 [pid 5099] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5099] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5100] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5100] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5099] <... futex resumed>) = 0 [pid 5100] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5099] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5100] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5100] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5099] <... futex resumed>) = 0 [pid 5099] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5099] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5100] <... mmap resumed>) = 0x20000000 [pid 5099] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5100] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5099] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5100] <... futex resumed>) = 0 [pid 5100] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5099] <... mprotect resumed>) = 0 [pid 5099] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5099] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5101]}, 88) = 5101 ./strace-static-x86_64: Process 5101 attached [pid 5099] rt_sigprocmask(SIG_SETMASK, [], [pid 5101] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5099] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5099] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5099] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5101] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5101] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5101] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5099] <... futex resumed>) = ? [pid 5100] <... futex resumed>) = ? [pid 5101] +++ killed by SIGBUS +++ [pid 5100] +++ killed by SIGBUS +++ [pid 5099] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5099, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./19", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./19/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./19/binderfs") = 0 [ 74.003649][ T5100] loop0: detected capacity change from 0 to 2048 [ 74.014972][ T5100] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./19/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./19/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./19/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./19/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./19/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./19/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./19") = 0 mkdir("./20", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5102 attached [pid 5102] set_robust_list(0x5555562186a0, 24 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5102 [pid 5102] <... set_robust_list resumed>) = 0 [pid 5102] chdir("./20") = 0 [pid 5102] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5102] setpgid(0, 0) = 0 [pid 5102] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5102] write(3, "1000", 4) = 4 [pid 5102] close(3) = 0 [pid 5102] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5102] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5102] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5102] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5102] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5102] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5102] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5102] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5103 attached => {parent_tid=[5103]}, 88) = 5103 [pid 5103] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5102] rt_sigprocmask(SIG_SETMASK, [], [pid 5103] <... rseq resumed>) = 0 [pid 5102] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5103] set_robust_list(0x7f3dc90769a0, 24 [pid 5102] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5103] <... set_robust_list resumed>) = 0 [pid 5102] <... futex resumed>) = 0 [pid 5103] rt_sigprocmask(SIG_SETMASK, [], [pid 5102] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5103] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5103] memfd_create("syzkaller", 0) = 3 [pid 5103] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5103] 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 5103] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5103] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5103] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5103] close(3) = 0 [pid 5103] mkdir("./file0", 0777) = 0 [pid 5103] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5103] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5103] chdir("./file0") = 0 [pid 5103] ioctl(4, LOOP_CLR_FD) = 0 [pid 5103] close(4) = 0 [pid 5103] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5103] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5102] <... futex resumed>) = 0 [pid 5102] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5102] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5103] <... futex resumed>) = 0 [pid 5103] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5103] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5103] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5102] <... futex resumed>) = 0 [pid 5102] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5102] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5103] <... futex resumed>) = 0 [pid 5103] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5103] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5102] <... futex resumed>) = 0 [pid 5102] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5103] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5102] <... futex resumed>) = 0 [pid 5103] <... mmap resumed>) = 0x20000000 [pid 5102] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5103] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5103] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5102] <... futex resumed>) = 0 [pid 5102] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5102] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5102] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5102] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5104 attached [pid 5104] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5102] <... clone3 resumed> => {parent_tid=[5104]}, 88) = 5104 [pid 5104] <... rseq resumed>) = 0 [pid 5104] set_robust_list(0x7f3dc0d559a0, 24 [pid 5102] rt_sigprocmask(SIG_SETMASK, [], [pid 5104] <... set_robust_list resumed>) = 0 [pid 5102] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5102] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5102] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5104] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5104] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5103] <... futex resumed>) = ? [pid 5102] <... futex resumed>) = ? [pid 5103] +++ killed by SIGBUS +++ [pid 5104] +++ killed by SIGBUS +++ [pid 5102] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5102, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./20", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./20", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./20/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./20/binderfs") = 0 umount2("./20/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./20/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./20/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./20/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 74.117857][ T5103] loop0: detected capacity change from 0 to 2048 [ 74.130208][ T5103] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./20/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./20/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./20") = 0 mkdir("./21", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5105 ./strace-static-x86_64: Process 5105 attached [pid 5105] set_robust_list(0x5555562186a0, 24) = 0 [pid 5105] chdir("./21") = 0 [pid 5105] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5105] setpgid(0, 0) = 0 [pid 5105] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5105] write(3, "1000", 4) = 4 [pid 5105] close(3) = 0 [pid 5105] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5105] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5105] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5105] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5105] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5105] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5105] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5105] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5106 attached => {parent_tid=[5106]}, 88) = 5106 [pid 5106] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5105] rt_sigprocmask(SIG_SETMASK, [], [pid 5106] set_robust_list(0x7f3dc90769a0, 24 [pid 5105] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5106] <... set_robust_list resumed>) = 0 [pid 5105] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5106] rt_sigprocmask(SIG_SETMASK, [], [pid 5105] <... futex resumed>) = 0 [pid 5105] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5106] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5106] memfd_create("syzkaller", 0) = 3 [pid 5106] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5106] 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 5106] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5106] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5106] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5106] close(3) = 0 [pid 5106] mkdir("./file0", 0777) = 0 [pid 5106] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5106] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5106] chdir("./file0") = 0 [pid 5106] ioctl(4, LOOP_CLR_FD) = 0 [pid 5106] close(4) = 0 [pid 5106] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5106] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5105] <... futex resumed>) = 0 [pid 5105] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5106] <... futex resumed>) = 0 [pid 5105] <... futex resumed>) = 1 [pid 5106] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5105] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5106] <... open resumed>) = 4 [pid 5106] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5105] <... futex resumed>) = 0 [pid 5105] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5106] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5105] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5106] <... open resumed>) = 5 [pid 5106] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5105] <... futex resumed>) = 0 [pid 5106] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5105] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5105] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5105] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5106] <... mmap resumed>) = 0x20000000 [pid 5105] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5106] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5106] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5105] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5105] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5105] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5107 attached [pid 5107] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5105] <... clone3 resumed> => {parent_tid=[5107]}, 88) = 5107 [pid 5107] <... rseq resumed>) = 0 [pid 5107] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5105] rt_sigprocmask(SIG_SETMASK, [], [pid 5107] rt_sigprocmask(SIG_SETMASK, [], [pid 5105] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5107] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5105] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5107] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5105] <... futex resumed>) = 0 [pid 5105] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5106] <... futex resumed>) = ? [pid 5107] +++ killed by SIGBUS +++ [pid 5106] +++ killed by SIGBUS +++ [pid 5105] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5105, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=0} --- umount2("./21", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./21/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./21/binderfs") = 0 umount2("./21/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./21/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./21/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./21/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./21/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [ 74.253544][ T5106] loop0: detected capacity change from 0 to 2048 [ 74.265186][ T5106] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./21/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./21") = 0 mkdir("./22", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5108 attached [pid 5108] set_robust_list(0x5555562186a0, 24) = 0 [pid 5108] chdir("./22") = 0 [pid 5108] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5108] setpgid(0, 0) = 0 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5108 [pid 5108] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5108] write(3, "1000", 4) = 4 [pid 5108] close(3) = 0 [pid 5108] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5108] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5108] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5108] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5108] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5108] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5108] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5108] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5109 attached [pid 5109] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5108] <... clone3 resumed> => {parent_tid=[5109]}, 88) = 5109 [pid 5109] <... rseq resumed>) = 0 [pid 5108] rt_sigprocmask(SIG_SETMASK, [], [pid 5109] set_robust_list(0x7f3dc90769a0, 24 [pid 5108] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5109] <... set_robust_list resumed>) = 0 [pid 5108] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5109] rt_sigprocmask(SIG_SETMASK, [], [pid 5108] <... futex resumed>) = 0 [pid 5109] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5108] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5109] memfd_create("syzkaller", 0) = 3 [pid 5109] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5109] 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 5109] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5109] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5109] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5109] close(3) = 0 [pid 5109] mkdir("./file0", 0777) = 0 [pid 5109] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5109] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5109] chdir("./file0") = 0 [pid 5109] ioctl(4, LOOP_CLR_FD) = 0 [pid 5109] close(4) = 0 [pid 5109] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5108] <... futex resumed>) = 0 [pid 5109] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5108] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5109] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5108] <... futex resumed>) = 0 [pid 5108] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5109] <... open resumed>) = 4 [pid 5109] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5108] <... futex resumed>) = 0 [pid 5109] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5108] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5108] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5109] <... open resumed>) = 5 [pid 5109] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5108] <... futex resumed>) = 0 [pid 5108] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5109] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5108] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5109] <... mmap resumed>) = 0x20000000 [pid 5108] <... futex resumed>) = 0 [pid 5108] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5109] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5109] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5108] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5108] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5108] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5108] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5110 attached => {parent_tid=[5110]}, 88) = 5110 [pid 5110] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5108] rt_sigprocmask(SIG_SETMASK, [], [pid 5110] <... rseq resumed>) = 0 [pid 5108] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5110] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5108] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5110] rt_sigprocmask(SIG_SETMASK, [], [pid 5108] <... futex resumed>) = 0 [pid 5110] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5108] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5110] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5109] <... futex resumed>) = ? [pid 5108] <... futex resumed>) = ? [pid 5110] +++ killed by SIGBUS +++ [pid 5109] +++ killed by SIGBUS +++ [pid 5108] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5108, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./22", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./22/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./22/binderfs") = 0 umount2("./22/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./22/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./22/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 74.368286][ T5109] loop0: detected capacity change from 0 to 2048 [ 74.379547][ T5109] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./22/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./22/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./22/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./22") = 0 mkdir("./23", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5111 ./strace-static-x86_64: Process 5111 attached [pid 5111] set_robust_list(0x5555562186a0, 24) = 0 [pid 5111] chdir("./23") = 0 [pid 5111] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5111] setpgid(0, 0) = 0 [pid 5111] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5111] write(3, "1000", 4) = 4 [pid 5111] close(3) = 0 [pid 5111] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5111] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5111] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5111] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5111] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5111] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5111] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5111] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5112 attached => {parent_tid=[5112]}, 88) = 5112 [pid 5112] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5111] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5111] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5112] <... rseq resumed>) = 0 [pid 5112] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5112] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5112] memfd_create("syzkaller", 0) = 3 [pid 5112] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5111] <... futex resumed>) = 0 [pid 5111] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5112] 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 5112] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5112] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5112] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5112] close(3) = 0 [pid 5112] mkdir("./file0", 0777) = 0 [pid 5112] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5112] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5112] chdir("./file0") = 0 [pid 5112] ioctl(4, LOOP_CLR_FD) = 0 [pid 5112] close(4) = 0 [pid 5112] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5111] <... futex resumed>) = 0 [pid 5112] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5111] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5111] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5112] <... open resumed>) = 4 [pid 5112] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5111] <... futex resumed>) = 0 [pid 5111] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5111] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5112] <... futex resumed>) = 1 [pid 5112] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5112] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5111] <... futex resumed>) = 0 [pid 5111] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5111] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5111] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5111] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5112] <... futex resumed>) = 1 [pid 5111] <... mprotect resumed>) = 0 [pid 5112] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5111] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5112] <... mmap resumed>) = 0x20000000 [pid 5111] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5111] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5113 attached => {parent_tid=[5113]}, 88) = 5113 [pid 5113] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5111] rt_sigprocmask(SIG_SETMASK, [], [pid 5113] <... rseq resumed>) = 0 [pid 5113] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5113] rt_sigprocmask(SIG_SETMASK, [], [pid 5111] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5113] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5113] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5111] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5111] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5113] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5112] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5112] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5113] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5112] <... futex resumed>) = ? [pid 5111] <... futex resumed>) = ? [pid 5113] +++ killed by SIGBUS +++ [pid 5112] +++ killed by SIGBUS +++ [pid 5111] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5111, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./23", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./23/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./23/binderfs") = 0 [ 74.496516][ T5112] loop0: detected capacity change from 0 to 2048 [ 74.507927][ T5112] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./23/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./23/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./23/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./23/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./23/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./23/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./23") = 0 mkdir("./24", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5114 attached , child_tidptr=0x555556218690) = 5114 [pid 5114] set_robust_list(0x5555562186a0, 24) = 0 [pid 5114] chdir("./24") = 0 [pid 5114] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5114] setpgid(0, 0) = 0 [pid 5114] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5114] write(3, "1000", 4) = 4 [pid 5114] close(3) = 0 [pid 5114] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5114] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5114] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5114] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5114] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5114] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5114] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5114] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5115 attached [pid 5115] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5114] <... clone3 resumed> => {parent_tid=[5115]}, 88) = 5115 [pid 5115] <... rseq resumed>) = 0 [pid 5114] rt_sigprocmask(SIG_SETMASK, [], [pid 5115] set_robust_list(0x7f3dc90769a0, 24 [pid 5114] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5115] <... set_robust_list resumed>) = 0 [pid 5115] rt_sigprocmask(SIG_SETMASK, [], [pid 5114] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5115] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5114] <... futex resumed>) = 0 [pid 5115] memfd_create("syzkaller", 0 [pid 5114] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5115] <... memfd_create resumed>) = 3 [pid 5115] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5115] 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 5115] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5115] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5115] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5115] close(3) = 0 [pid 5115] mkdir("./file0", 0777) = 0 [pid 5115] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5115] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5115] chdir("./file0") = 0 [pid 5115] ioctl(4, LOOP_CLR_FD) = 0 [pid 5115] close(4) = 0 [pid 5115] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5114] <... futex resumed>) = 0 [pid 5115] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5114] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5114] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5115] <... open resumed>) = 4 [pid 5115] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5114] <... futex resumed>) = 0 [pid 5114] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5115] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5114] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5115] <... open resumed>) = 5 [pid 5115] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5115] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5114] <... futex resumed>) = 0 [pid 5114] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5115] <... futex resumed>) = 0 [pid 5114] <... futex resumed>) = 1 [pid 5115] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5114] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5115] <... mmap resumed>) = 0x20000000 [pid 5114] <... futex resumed>) = 0 [pid 5115] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5115] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5114] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5114] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5114] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5114] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5116 attached => {parent_tid=[5116]}, 88) = 5116 [pid 5114] rt_sigprocmask(SIG_SETMASK, [], [pid 5116] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5114] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5114] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5116] <... rseq resumed>) = 0 [pid 5114] <... futex resumed>) = 0 [pid 5116] set_robust_list(0x7f3dc0d559a0, 24 [pid 5114] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5116] <... set_robust_list resumed>) = 0 [pid 5116] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5116] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5114] <... futex resumed>) = ? [pid 5115] <... futex resumed>) = ? [pid 5115] +++ killed by SIGBUS +++ [pid 5116] +++ killed by SIGBUS +++ [pid 5114] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5114, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./24", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./24/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./24/binderfs") = 0 [ 74.597110][ T5115] loop0: detected capacity change from 0 to 2048 [ 74.608638][ T5115] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./24/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./24/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./24/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./24/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./24/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./24/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./24") = 0 mkdir("./25", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5117 attached , child_tidptr=0x555556218690) = 5117 [pid 5117] set_robust_list(0x5555562186a0, 24) = 0 [pid 5117] chdir("./25") = 0 [pid 5117] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5117] setpgid(0, 0) = 0 [pid 5117] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5117] write(3, "1000", 4) = 4 [pid 5117] close(3) = 0 [pid 5117] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5117] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5117] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5117] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5117] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5117] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5117] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5117] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5118 attached => {parent_tid=[5118]}, 88) = 5118 [pid 5118] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5117] rt_sigprocmask(SIG_SETMASK, [], [pid 5118] <... rseq resumed>) = 0 [pid 5117] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5118] set_robust_list(0x7f3dc90769a0, 24 [pid 5117] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5118] <... set_robust_list resumed>) = 0 [pid 5117] <... futex resumed>) = 0 [pid 5118] rt_sigprocmask(SIG_SETMASK, [], [pid 5117] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5118] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5118] memfd_create("syzkaller", 0) = 3 [pid 5118] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5118] 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 5118] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5118] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5118] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5118] close(3) = 0 [pid 5118] mkdir("./file0", 0777) = 0 [pid 5118] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5118] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5118] chdir("./file0") = 0 [pid 5118] ioctl(4, LOOP_CLR_FD) = 0 [pid 5118] close(4) = 0 [pid 5118] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5118] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5117] <... futex resumed>) = 0 [pid 5117] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5118] <... futex resumed>) = 0 [pid 5117] <... futex resumed>) = 1 [pid 5118] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5117] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5118] <... open resumed>) = 4 [pid 5118] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5117] <... futex resumed>) = 0 [pid 5118] <... futex resumed>) = 1 [pid 5117] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5118] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5117] <... futex resumed>) = 0 [pid 5118] <... open resumed>) = 5 [pid 5117] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5118] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5117] <... futex resumed>) = 0 [pid 5118] <... futex resumed>) = 1 [pid 5118] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5117] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5118] <... futex resumed>) = 0 [pid 5117] <... futex resumed>) = 1 [pid 5118] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5117] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5118] <... futex resumed>) = 0 [pid 5117] <... futex resumed>) = 0 [pid 5118] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5117] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5118] +++ killed by SIGBUS +++ [pid 5117] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5117, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./25", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./25/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./25/binderfs") = 0 umount2("./25/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./25/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./25/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./25/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./25/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./25/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./25") = 0 mkdir("./26", 0777) = 0 [ 74.723979][ T5118] loop0: detected capacity change from 0 to 2048 [ 74.736239][ T5118] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5119 ./strace-static-x86_64: Process 5119 attached [pid 5119] set_robust_list(0x5555562186a0, 24) = 0 [pid 5119] chdir("./26") = 0 [pid 5119] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5119] setpgid(0, 0) = 0 [pid 5119] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5119] write(3, "1000", 4) = 4 [pid 5119] close(3) = 0 [pid 5119] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5119] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5119] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5119] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5119] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5119] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5119] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5119] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5120 attached [pid 5120] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5119] <... clone3 resumed> => {parent_tid=[5120]}, 88) = 5120 [pid 5120] <... rseq resumed>) = 0 [pid 5120] set_robust_list(0x7f3dc90769a0, 24 [pid 5119] rt_sigprocmask(SIG_SETMASK, [], [pid 5120] <... set_robust_list resumed>) = 0 [pid 5119] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5120] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5119] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5120] memfd_create("syzkaller", 0 [pid 5119] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5120] <... memfd_create resumed>) = 3 [pid 5120] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5120] 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 5120] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5120] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5120] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5120] close(3) = 0 [pid 5120] mkdir("./file0", 0777) = 0 [pid 5120] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5120] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5120] chdir("./file0") = 0 [pid 5120] ioctl(4, LOOP_CLR_FD) = 0 [pid 5120] close(4) = 0 [pid 5120] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5120] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5119] <... futex resumed>) = 0 [pid 5119] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5120] <... futex resumed>) = 0 [pid 5119] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5120] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5120] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5119] <... futex resumed>) = 0 [pid 5120] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5119] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5120] <... open resumed>) = 5 [pid 5119] <... futex resumed>) = 0 [pid 5119] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5120] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5119] <... futex resumed>) = 0 [pid 5120] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5119] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5120] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5119] <... futex resumed>) = 0 [pid 5119] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5119] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5120] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5119] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5120] <... mmap resumed>) = 0x20000000 [pid 5119] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5120] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5119] <... mprotect resumed>) = 0 [pid 5120] <... futex resumed>) = 0 [pid 5119] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5120] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5119] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5119] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5121 attached => {parent_tid=[5121]}, 88) = 5121 [pid 5121] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5119] rt_sigprocmask(SIG_SETMASK, [], [pid 5121] <... rseq resumed>) = 0 [pid 5119] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5121] set_robust_list(0x7f3dc0d559a0, 24 [pid 5119] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5121] <... set_robust_list resumed>) = 0 [pid 5119] <... futex resumed>) = 0 [pid 5121] rt_sigprocmask(SIG_SETMASK, [], [pid 5119] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5121] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5121] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5120] <... futex resumed>) = ? [pid 5119] <... futex resumed>) = ? [pid 5121] +++ killed by SIGBUS +++ [pid 5120] +++ killed by SIGBUS +++ [pid 5119] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5119, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./26", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./26/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./26/binderfs") = 0 [ 74.837229][ T5120] loop0: detected capacity change from 0 to 2048 [ 74.852331][ T5120] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./26/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./26/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./26/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./26/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./26/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./26/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./26") = 0 mkdir("./27", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5122 ./strace-static-x86_64: Process 5122 attached [pid 5122] set_robust_list(0x5555562186a0, 24) = 0 [pid 5122] chdir("./27") = 0 [pid 5122] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5122] setpgid(0, 0) = 0 [pid 5122] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5122] write(3, "1000", 4) = 4 [pid 5122] close(3) = 0 [pid 5122] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5122] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5122] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5122] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5122] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5122] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5122] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5122] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5123 attached [pid 5123] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5122] <... clone3 resumed> => {parent_tid=[5123]}, 88) = 5123 [pid 5123] <... rseq resumed>) = 0 [pid 5123] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5123] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5123] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5122] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5122] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5123] <... futex resumed>) = 0 [pid 5122] <... futex resumed>) = 1 [pid 5123] memfd_create("syzkaller", 0 [pid 5122] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5123] <... memfd_create resumed>) = 3 [pid 5123] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5123] 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 5123] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5123] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5123] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5123] close(3) = 0 [pid 5123] mkdir("./file0", 0777) = 0 [pid 5123] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5123] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5123] chdir("./file0") = 0 [pid 5123] ioctl(4, LOOP_CLR_FD) = 0 [pid 5123] close(4) = 0 [pid 5123] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5122] <... futex resumed>) = 0 [pid 5122] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5122] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5123] <... futex resumed>) = 1 [pid 5123] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5123] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5122] <... futex resumed>) = 0 [pid 5122] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5122] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5123] <... futex resumed>) = 1 [pid 5123] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5123] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5122] <... futex resumed>) = 0 [pid 5123] <... futex resumed>) = 1 [pid 5122] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5123] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1<) = 0 [pid 5122] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5122] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5123] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5123] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5122] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5122] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5122] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5124 attached => {parent_tid=[5124]}, 88) = 5124 [pid 5124] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5124] set_robust_list(0x7f3dc0d559a0, 24 [pid 5122] rt_sigprocmask(SIG_SETMASK, [], [pid 5124] <... set_robust_list resumed>) = 0 [pid 5122] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5124] rt_sigprocmask(SIG_SETMASK, [], [pid 5122] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5124] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5122] <... futex resumed>) = 0 [pid 5124] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5122] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5123] <... futex resumed>) = ? [pid 5124] +++ killed by SIGBUS +++ [pid 5123] +++ killed by SIGBUS +++ [pid 5122] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5122, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./27", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./27/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./27/binderfs") = 0 umount2("./27/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./27/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./27/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./27/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./27/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./27/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./27") = 0 mkdir("./28", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 [ 74.958517][ T5123] loop0: detected capacity change from 0 to 2048 [ 74.969197][ T5123] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5125 attached [pid 5125] set_robust_list(0x5555562186a0, 24) = 0 [pid 5125] chdir("./28") = 0 [pid 5125] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5125] setpgid(0, 0) = 0 [pid 5125] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5125 [pid 5125] <... openat resumed>) = 3 [pid 5125] write(3, "1000", 4) = 4 [pid 5125] close(3) = 0 [pid 5125] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5125] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5125] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5125] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5125] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5125] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5125] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5125] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5126 attached => {parent_tid=[5126]}, 88) = 5126 [pid 5125] rt_sigprocmask(SIG_SETMASK, [], [pid 5126] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5125] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5126] <... rseq resumed>) = 0 [pid 5126] set_robust_list(0x7f3dc90769a0, 24 [pid 5125] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5126] <... set_robust_list resumed>) = 0 [pid 5125] <... futex resumed>) = 0 [pid 5126] rt_sigprocmask(SIG_SETMASK, [], [pid 5125] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5126] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5126] memfd_create("syzkaller", 0) = 3 [pid 5126] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5126] 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 5126] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5126] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5126] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5126] close(3) = 0 [pid 5126] mkdir("./file0", 0777) = 0 [pid 5126] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5126] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5126] chdir("./file0") = 0 [pid 5126] ioctl(4, LOOP_CLR_FD) = 0 [pid 5126] close(4) = 0 [pid 5126] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5125] <... futex resumed>) = 0 [pid 5126] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5125] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5126] <... open resumed>) = 4 [pid 5126] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5126] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5125] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5125] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5126] <... futex resumed>) = 0 [pid 5125] <... futex resumed>) = 1 [pid 5126] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5125] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5126] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5125] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5126] <... futex resumed>) = 0 [pid 5126] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5125] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5126] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5125] <... futex resumed>) = 0 [pid 5126] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5125] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5126] <... mmap resumed>) = 0x20000000 [pid 5125] <... futex resumed>) = 0 [pid 5125] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5126] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5125] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5126] <... futex resumed>) = 0 [pid 5126] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5125] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5125] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5125] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5127 attached => {parent_tid=[5127]}, 88) = 5127 [pid 5127] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5127] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5127] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5127] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5125] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5125] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5127] <... futex resumed>) = 0 [pid 5127] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5126] <... futex resumed>) = ? [pid 5126] +++ killed by SIGBUS +++ [pid 5127] +++ killed by SIGBUS +++ [pid 5125] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5125, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./28", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./28/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./28/binderfs") = 0 [ 75.059323][ T5126] loop0: detected capacity change from 0 to 2048 [ 75.074549][ T5126] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./28/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./28/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./28/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./28/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./28/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./28/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./28") = 0 mkdir("./29", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5128 ./strace-static-x86_64: Process 5128 attached [pid 5128] set_robust_list(0x5555562186a0, 24) = 0 [pid 5128] chdir("./29") = 0 [pid 5128] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5128] setpgid(0, 0) = 0 [pid 5128] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5128] write(3, "1000", 4) = 4 [pid 5128] close(3) = 0 [pid 5128] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5128] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5128] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5128] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5128] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5128] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5128] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5128] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5129]}, 88) = 5129 [pid 5128] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5128] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5128] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5129 attached [pid 5129] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5129] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5129] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5129] memfd_create("syzkaller", 0) = 3 [pid 5129] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5129] 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 5129] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5129] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5129] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5129] close(3) = 0 [pid 5129] mkdir("./file0", 0777) = 0 [pid 5129] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5129] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5129] chdir("./file0") = 0 [pid 5129] ioctl(4, LOOP_CLR_FD) = 0 [pid 5129] close(4) = 0 [pid 5129] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5128] <... futex resumed>) = 0 [pid 5129] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5128] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5128] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5129] <... futex resumed>) = 0 [pid 5129] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5129] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5128] <... futex resumed>) = 0 [pid 5128] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5129] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5129] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5129] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5128] <... futex resumed>) = 1 [pid 5129] <... futex resumed>) = 0 [pid 5129] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5128] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5128] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5129] <... futex resumed>) = 0 [pid 5129] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5129] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5128] <... futex resumed>) = 0 [pid 5129] <... futex resumed>) = 0 [pid 5128] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5129] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5128] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5128] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5128] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5128] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5130 attached [pid 5130] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5128] <... clone3 resumed> => {parent_tid=[5130]}, 88) = 5130 [pid 5130] <... rseq resumed>) = 0 [pid 5130] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5128] rt_sigprocmask(SIG_SETMASK, [], [pid 5130] rt_sigprocmask(SIG_SETMASK, [], [pid 5128] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5128] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5130] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5130] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5128] <... futex resumed>) = 0 [pid 5128] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5129] <... futex resumed>) = ? [pid 5128] <... futex resumed>) = ? [pid 5129] +++ killed by SIGBUS +++ [pid 5130] +++ killed by SIGBUS +++ [pid 5128] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5128, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./29", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./29/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./29/binderfs") = 0 umount2("./29/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./29/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./29/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./29/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./29/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [ 75.182285][ T5129] loop0: detected capacity change from 0 to 2048 [ 75.193017][ T5129] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./29/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./29") = 0 mkdir("./30", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5131 ./strace-static-x86_64: Process 5131 attached [pid 5131] set_robust_list(0x5555562186a0, 24) = 0 [pid 5131] chdir("./30") = 0 [pid 5131] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5131] setpgid(0, 0) = 0 [pid 5131] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5131] write(3, "1000", 4) = 4 [pid 5131] close(3) = 0 [pid 5131] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5131] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5131] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5131] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5131] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5131] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5131] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5131] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5132 attached => {parent_tid=[5132]}, 88) = 5132 [pid 5132] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5131] rt_sigprocmask(SIG_SETMASK, [], [pid 5132] <... rseq resumed>) = 0 [pid 5131] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5131] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5132] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5132] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5132] memfd_create("syzkaller", 0) = 3 [pid 5132] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5131] <... futex resumed>) = 0 [pid 5132] 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 5131] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5132] <... write resumed>) = 1048576 [pid 5132] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5132] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5132] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5132] close(3) = 0 [pid 5132] mkdir("./file0", 0777) = 0 [pid 5132] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5132] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5132] chdir("./file0") = 0 [pid 5132] ioctl(4, LOOP_CLR_FD) = 0 [pid 5132] close(4) = 0 [pid 5132] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5131] <... futex resumed>) = 0 [pid 5132] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5131] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5131] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5132] <... open resumed>) = 4 [pid 5132] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5131] <... futex resumed>) = 0 [pid 5132] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5131] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5132] <... futex resumed>) = 0 [pid 5131] <... futex resumed>) = 1 [pid 5132] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5131] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5132] <... open resumed>) = 5 [pid 5132] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5131] <... futex resumed>) = 0 [pid 5131] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5132] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5131] <... futex resumed>) = 0 [pid 5131] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5131] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5131] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5132] <... mmap resumed>) = 0x20000000 [pid 5131] <... mprotect resumed>) = 0 [pid 5132] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5131] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5132] <... futex resumed>) = 0 [pid 5131] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5132] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5131] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5133]}, 88) = 5133 [pid 5131] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5131] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5131] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5133 attached [pid 5133] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5133] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5133] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5133] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5132] <... futex resumed>) = ? [pid 5131] <... futex resumed>) = ? [pid 5133] +++ killed by SIGBUS +++ [pid 5132] +++ killed by SIGBUS +++ [pid 5131] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5131, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./30", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./30/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./30/binderfs") = 0 [ 75.302124][ T5132] loop0: detected capacity change from 0 to 2048 [ 75.315422][ T5132] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./30/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./30/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./30/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./30/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./30/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./30/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./30") = 0 mkdir("./31", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5134 ./strace-static-x86_64: Process 5134 attached [pid 5134] set_robust_list(0x5555562186a0, 24) = 0 [pid 5134] chdir("./31") = 0 [pid 5134] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5134] setpgid(0, 0) = 0 [pid 5134] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5134] write(3, "1000", 4) = 4 [pid 5134] close(3) = 0 [pid 5134] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5134] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5134] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5134] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5134] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5134] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5134] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5134] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5135]}, 88) = 5135 [pid 5134] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5134] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5134] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5135 attached [pid 5135] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5135] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5135] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5135] memfd_create("syzkaller", 0) = 3 [pid 5135] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5135] 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 5135] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5135] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5135] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5135] close(3) = 0 [pid 5135] mkdir("./file0", 0777) = 0 [pid 5135] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5135] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5135] chdir("./file0") = 0 [pid 5135] ioctl(4, LOOP_CLR_FD) = 0 [pid 5135] close(4) = 0 [pid 5135] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5134] <... futex resumed>) = 0 [pid 5135] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5134] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5135] <... futex resumed>) = 0 [pid 5134] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5135] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5135] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5134] <... futex resumed>) = 0 [pid 5135] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5134] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5134] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5135] <... futex resumed>) = 0 [pid 5135] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5135] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5134] <... futex resumed>) = 0 [pid 5134] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5135] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5134] <... futex resumed>) = 0 [pid 5134] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5134] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5135] <... mmap resumed>) = 0x20000000 [pid 5135] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5134] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5135] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5134] <... mprotect resumed>) = 0 [pid 5134] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5134] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5136 attached [pid 5136] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5134] <... clone3 resumed> => {parent_tid=[5136]}, 88) = 5136 [pid 5136] <... rseq resumed>) = 0 [pid 5134] rt_sigprocmask(SIG_SETMASK, [], [pid 5136] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5134] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5136] rt_sigprocmask(SIG_SETMASK, [], [pid 5134] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5136] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5134] <... futex resumed>) = 0 [pid 5136] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5134] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5136] +++ killed by SIGBUS +++ [pid 5135] <... futex resumed>) = ? [pid 5135] +++ killed by SIGBUS +++ [pid 5134] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5134, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./31", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./31/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./31/binderfs") = 0 umount2("./31/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./31/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./31/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./31/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./31/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./31/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./31") = 0 mkdir("./32", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5137 attached , child_tidptr=0x555556218690) = 5137 [pid 5137] set_robust_list(0x5555562186a0, 24) = 0 [pid 5137] chdir("./32") = 0 [pid 5137] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5137] setpgid(0, 0) = 0 [pid 5137] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5137] write(3, "1000", 4) = 4 [pid 5137] close(3) = 0 [ 75.433126][ T5135] loop0: detected capacity change from 0 to 2048 [ 75.445440][ T5135] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5137] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5137] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5137] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5137] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5137] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5137] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5137] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5137] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5138 attached => {parent_tid=[5138]}, 88) = 5138 [pid 5138] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5138] set_robust_list(0x7f3dc90769a0, 24 [pid 5137] rt_sigprocmask(SIG_SETMASK, [], [pid 5138] <... set_robust_list resumed>) = 0 [pid 5137] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5138] rt_sigprocmask(SIG_SETMASK, [], [pid 5137] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5138] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5137] <... futex resumed>) = 0 [pid 5138] memfd_create("syzkaller", 0 [pid 5137] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5138] <... memfd_create resumed>) = 3 [pid 5138] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5138] 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 5138] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5138] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5138] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5138] close(3) = 0 [pid 5138] mkdir("./file0", 0777) = 0 [pid 5138] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5138] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5138] chdir("./file0") = 0 [pid 5138] ioctl(4, LOOP_CLR_FD) = 0 [pid 5138] close(4) = 0 [pid 5138] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5137] <... futex resumed>) = 0 [pid 5137] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5137] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5138] <... futex resumed>) = 1 [pid 5138] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5138] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5137] <... futex resumed>) = 0 [pid 5137] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5137] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5138] <... futex resumed>) = 1 [pid 5138] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5138] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5137] <... futex resumed>) = 0 [pid 5137] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5137] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5137] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5137] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5137] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5137] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5138] <... futex resumed>) = 1 [pid 5138] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5137] <... clone3 resumed> => {parent_tid=[5139]}, 88) = 5139 [pid 5137] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5137] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5139] <... futex resumed>) = 0 [pid 5139] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5137] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5139] +++ killed by SIGBUS +++ [pid 5138] +++ killed by SIGBUS +++ [pid 5137] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5137, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./32", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./32/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./32/binderfs") = 0 [ 75.516376][ T5138] loop0: detected capacity change from 0 to 2048 [ 75.531289][ T5138] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./32/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./32/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./32/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./32/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./32/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./32/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./32") = 0 mkdir("./33", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5140 attached , child_tidptr=0x555556218690) = 5140 [pid 5140] set_robust_list(0x5555562186a0, 24) = 0 [pid 5140] chdir("./33") = 0 [pid 5140] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5140] setpgid(0, 0) = 0 [pid 5140] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5140] write(3, "1000", 4) = 4 [pid 5140] close(3) = 0 [pid 5140] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5140] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5140] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5140] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5140] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5140] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5140] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5140] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5141 attached [pid 5141] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5141] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5141] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5141] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5140] <... clone3 resumed> => {parent_tid=[5141]}, 88) = 5141 [pid 5140] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5140] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5141] <... futex resumed>) = 0 [pid 5140] <... futex resumed>) = 1 [pid 5141] memfd_create("syzkaller", 0 [pid 5140] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5141] <... memfd_create resumed>) = 3 [pid 5141] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5141] 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 5141] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5141] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5141] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5141] close(3) = 0 [pid 5141] mkdir("./file0", 0777) = 0 [pid 5141] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5141] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5141] chdir("./file0") = 0 [pid 5141] ioctl(4, LOOP_CLR_FD) = 0 [pid 5141] close(4) = 0 [pid 5141] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5141] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5140] <... futex resumed>) = 0 [pid 5140] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5141] <... futex resumed>) = 0 [pid 5141] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5140] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5141] <... open resumed>) = 4 [pid 5141] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5140] <... futex resumed>) = 0 [pid 5140] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5141] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5140] <... futex resumed>) = 0 [pid 5140] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5141] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5140] <... futex resumed>) = 0 [pid 5140] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5140] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5140] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5140] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5141] <... futex resumed>) = 1 [pid 5140] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5141] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5140] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5141] <... mmap resumed>) = 0x20000000 [pid 5140] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5142 attached [pid 5141] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5140] <... clone3 resumed> => {parent_tid=[5142]}, 88) = 5142 [pid 5141] <... futex resumed>) = 0 [pid 5140] rt_sigprocmask(SIG_SETMASK, [], [pid 5141] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5140] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5140] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5140] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5142] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5142] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5142] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5142] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5142] +++ killed by SIGBUS +++ [pid 5140] <... futex resumed>) = ? [pid 5141] <... futex resumed>) = ? [pid 5141] +++ killed by SIGBUS +++ [pid 5140] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5140, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./33", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 [ 75.625481][ T5141] loop0: detected capacity change from 0 to 2048 [ 75.636773][ T5141] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./33/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./33/binderfs") = 0 umount2("./33/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./33/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./33/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./33/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./33/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./33/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./33") = 0 mkdir("./34", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5143 ./strace-static-x86_64: Process 5143 attached [pid 5143] set_robust_list(0x5555562186a0, 24) = 0 [pid 5143] chdir("./34") = 0 [pid 5143] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5143] setpgid(0, 0) = 0 [pid 5143] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5143] write(3, "1000", 4) = 4 [pid 5143] close(3) = 0 [pid 5143] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5143] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5143] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5143] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5143] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5143] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5143] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5143] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5144 attached => {parent_tid=[5144]}, 88) = 5144 [pid 5144] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5143] rt_sigprocmask(SIG_SETMASK, [], [pid 5144] <... rseq resumed>) = 0 [pid 5144] set_robust_list(0x7f3dc90769a0, 24 [pid 5143] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5143] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5144] <... set_robust_list resumed>) = 0 [pid 5144] rt_sigprocmask(SIG_SETMASK, [], [pid 5143] <... futex resumed>) = 0 [pid 5144] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5144] memfd_create("syzkaller", 0) = 3 [pid 5144] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5144] 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 5143] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5144] <... write resumed>) = 1048576 [pid 5144] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5144] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5144] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5144] close(3) = 0 [pid 5144] mkdir("./file0", 0777) = 0 [pid 5144] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5144] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5144] chdir("./file0") = 0 [pid 5144] ioctl(4, LOOP_CLR_FD) = 0 [pid 5144] close(4) = 0 [pid 5144] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5144] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5143] <... futex resumed>) = 0 [pid 5143] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5144] <... futex resumed>) = 0 [pid 5144] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5143] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5144] <... open resumed>) = 4 [pid 5144] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5143] <... futex resumed>) = 0 [pid 5144] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5143] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5144] <... open resumed>) = 5 [pid 5143] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5144] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5143] <... futex resumed>) = 0 [pid 5143] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5143] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5144] <... futex resumed>) = 1 [pid 5143] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5144] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5143] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5144] <... mmap resumed>) = 0x20000000 [pid 5143] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5143] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5143] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5144] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5145 attached ) = 0 [pid 5143] <... clone3 resumed> => {parent_tid=[5145]}, 88) = 5145 [pid 5145] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5143] rt_sigprocmask(SIG_SETMASK, [], [pid 5145] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5144] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5143] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5145] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5143] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5145] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5143] <... futex resumed>) = 0 [pid 5143] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5144] <... futex resumed>) = ? [pid 5144] +++ killed by SIGBUS +++ [pid 5145] +++ killed by SIGBUS +++ [pid 5143] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5143, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./34", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./34", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./34/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./34/binderfs") = 0 umount2("./34/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./34/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./34/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./34/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 75.750799][ T5144] loop0: detected capacity change from 0 to 2048 [ 75.761780][ T5144] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./34/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./34/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./34") = 0 mkdir("./35", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5146 ./strace-static-x86_64: Process 5146 attached [pid 5146] set_robust_list(0x5555562186a0, 24) = 0 [pid 5146] chdir("./35") = 0 [pid 5146] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5146] setpgid(0, 0) = 0 [pid 5146] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5146] write(3, "1000", 4) = 4 [pid 5146] close(3) = 0 [pid 5146] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5146] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5146] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5146] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5146] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5146] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5146] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5146] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5147 attached => {parent_tid=[5147]}, 88) = 5147 [pid 5147] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5147] set_robust_list(0x7f3dc90769a0, 24 [pid 5146] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5146] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5146] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5147] <... set_robust_list resumed>) = 0 [pid 5147] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5147] memfd_create("syzkaller", 0) = 3 [pid 5147] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5147] 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 5147] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5147] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5147] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5147] close(3) = 0 [pid 5147] mkdir("./file0", 0777) = 0 [pid 5147] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5147] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5147] chdir("./file0") = 0 [pid 5147] ioctl(4, LOOP_CLR_FD) = 0 [pid 5147] close(4) = 0 [pid 5147] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5146] <... futex resumed>) = 0 [pid 5146] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5146] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5147] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5147] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5146] <... futex resumed>) = 0 [pid 5147] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5146] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5147] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5146] <... futex resumed>) = 0 [pid 5147] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5146] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5147] <... open resumed>) = 5 [pid 5147] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5146] <... futex resumed>) = 0 [pid 5147] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5146] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5147] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5146] <... futex resumed>) = 0 [pid 5147] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5146] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5147] <... mmap resumed>) = 0x20000000 [pid 5146] <... futex resumed>) = 0 [pid 5146] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5147] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5146] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5147] <... futex resumed>) = 0 [pid 5146] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5147] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5146] <... mprotect resumed>) = 0 [pid 5146] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5146] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5148 attached => {parent_tid=[5148]}, 88) = 5148 [pid 5148] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5148] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5146] rt_sigprocmask(SIG_SETMASK, [], [pid 5148] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5148] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5146] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5146] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5148] <... futex resumed>) = 0 [pid 5146] <... futex resumed>) = 1 [pid 5148] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5147] <... futex resumed>) = ? [pid 5148] +++ killed by SIGBUS +++ [pid 5147] +++ killed by SIGBUS +++ [ 75.872914][ T5147] loop0: detected capacity change from 0 to 2048 [ 75.884651][ T5147] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5146] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5146, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./35", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./35/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./35/binderfs") = 0 umount2("./35/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./35/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./35/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./35/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./35/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./35/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./35") = 0 mkdir("./36", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5149 attached , child_tidptr=0x555556218690) = 5149 [pid 5149] set_robust_list(0x5555562186a0, 24) = 0 [pid 5149] chdir("./36") = 0 [pid 5149] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5149] setpgid(0, 0) = 0 [pid 5149] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5149] write(3, "1000", 4) = 4 [pid 5149] close(3) = 0 [pid 5149] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5149] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5149] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5149] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5149] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5149] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5149] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5149] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5150 attached [pid 5150] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5149] <... clone3 resumed> => {parent_tid=[5150]}, 88) = 5150 [pid 5150] <... rseq resumed>) = 0 [pid 5149] rt_sigprocmask(SIG_SETMASK, [], [pid 5150] set_robust_list(0x7f3dc90769a0, 24 [pid 5149] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5150] <... set_robust_list resumed>) = 0 [pid 5149] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5150] rt_sigprocmask(SIG_SETMASK, [], [pid 5149] <... futex resumed>) = 0 [pid 5150] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5149] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5150] memfd_create("syzkaller", 0) = 3 [pid 5150] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5150] 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 5150] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5150] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5150] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5150] close(3) = 0 [pid 5150] mkdir("./file0", 0777) = 0 [pid 5150] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5150] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5150] chdir("./file0") = 0 [pid 5150] ioctl(4, LOOP_CLR_FD) = 0 [pid 5150] close(4) = 0 [pid 5150] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5149] <... futex resumed>) = 0 [pid 5150] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5149] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5150] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5149] <... futex resumed>) = 0 [pid 5150] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5149] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5150] <... open resumed>) = 4 [pid 5150] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5149] <... futex resumed>) = 0 [pid 5150] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5149] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5150] <... open resumed>) = 5 [pid 5149] <... futex resumed>) = 0 [pid 5150] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5149] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5150] <... futex resumed>) = 0 [pid 5150] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5149] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5149] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5150] <... futex resumed>) = 0 [pid 5149] <... futex resumed>) = 1 [pid 5150] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5149] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5150] <... mmap resumed>) = 0x20000000 [pid 5149] <... futex resumed>) = 0 [pid 5150] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5149] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5150] <... futex resumed>) = 0 [pid 5150] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5149] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5149] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5149] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5149] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5151 attached => {parent_tid=[5151]}, 88) = 5151 [pid 5151] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5149] rt_sigprocmask(SIG_SETMASK, [], [pid 5151] set_robust_list(0x7f3dc0d559a0, 24 [pid 5149] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5149] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5151] <... set_robust_list resumed>) = 0 [pid 5149] <... futex resumed>) = 0 [pid 5151] rt_sigprocmask(SIG_SETMASK, [], [pid 5149] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5151] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5151] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5150] <... futex resumed>) = ? [pid 5149] <... futex resumed>) = ? [pid 5150] +++ killed by SIGBUS +++ [pid 5151] +++ killed by SIGBUS +++ [pid 5149] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5149, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./36", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./36/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./36/binderfs") = 0 [ 76.000341][ T5150] loop0: detected capacity change from 0 to 2048 [ 76.013075][ T5150] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./36/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./36/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./36/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./36/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./36/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./36/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./36") = 0 mkdir("./37", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5152 attached , child_tidptr=0x555556218690) = 5152 [pid 5152] set_robust_list(0x5555562186a0, 24) = 0 [pid 5152] chdir("./37") = 0 [pid 5152] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5152] setpgid(0, 0) = 0 [pid 5152] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5152] write(3, "1000", 4) = 4 [pid 5152] close(3) = 0 [pid 5152] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5152] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5152] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5152] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5152] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5152] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5152] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5152] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5153]}, 88) = 5153 [pid 5152] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5152] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5152] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5153 attached [pid 5153] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5153] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5153] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5153] memfd_create("syzkaller", 0) = 3 [pid 5153] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5153] 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 5153] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5153] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5153] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5153] close(3) = 0 [pid 5153] mkdir("./file0", 0777) = 0 [pid 5153] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5153] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5153] chdir("./file0") = 0 [pid 5153] ioctl(4, LOOP_CLR_FD) = 0 [pid 5153] close(4) = 0 [pid 5153] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5152] <... futex resumed>) = 0 [pid 5153] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5152] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5153] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5152] <... futex resumed>) = 0 [pid 5153] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5152] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5153] <... open resumed>) = 4 [pid 5153] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5152] <... futex resumed>) = 0 [pid 5153] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5152] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5153] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5153] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5152] <... futex resumed>) = 0 [pid 5152] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5153] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5152] <... futex resumed>) = 0 [pid 5152] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5153] <... futex resumed>) = 1 [pid 5152] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5153] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5152] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5153] <... mmap resumed>) = 0x20000000 [pid 5152] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5152] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5153] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5153] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5152] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5152] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5154]}, 88) = 5154 ./strace-static-x86_64: Process 5154 attached [pid 5154] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5154] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5152] rt_sigprocmask(SIG_SETMASK, [], [pid 5154] rt_sigprocmask(SIG_SETMASK, [], [pid 5152] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5154] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5152] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5152] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5154] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5153] <... futex resumed>) = ? [pid 5152] <... futex resumed>) = ? [pid 5153] +++ killed by SIGBUS +++ [pid 5154] +++ killed by SIGBUS +++ [pid 5152] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5152, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./37", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./37/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./37/binderfs") = 0 [ 76.097495][ T5153] loop0: detected capacity change from 0 to 2048 [ 76.116602][ T5153] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./37/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./37/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./37/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./37/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./37/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./37/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./37") = 0 mkdir("./38", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5155 ./strace-static-x86_64: Process 5155 attached [pid 5155] set_robust_list(0x5555562186a0, 24) = 0 [pid 5155] chdir("./38") = 0 [pid 5155] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5155] setpgid(0, 0) = 0 [pid 5155] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5155] write(3, "1000", 4) = 4 [pid 5155] close(3) = 0 [pid 5155] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5155] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5155] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5155] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5155] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5155] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5155] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5155] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5156 attached => {parent_tid=[5156]}, 88) = 5156 [pid 5156] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5155] rt_sigprocmask(SIG_SETMASK, [], [pid 5156] <... rseq resumed>) = 0 [pid 5156] set_robust_list(0x7f3dc90769a0, 24 [pid 5155] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5156] <... set_robust_list resumed>) = 0 [pid 5155] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5156] rt_sigprocmask(SIG_SETMASK, [], [pid 5155] <... futex resumed>) = 0 [pid 5156] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5155] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5156] memfd_create("syzkaller", 0) = 3 [pid 5156] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5156] 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 5156] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5156] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5156] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5156] close(3) = 0 [pid 5156] mkdir("./file0", 0777) = 0 [pid 5156] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5156] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5156] chdir("./file0") = 0 [pid 5156] ioctl(4, LOOP_CLR_FD) = 0 [pid 5156] close(4) = 0 [pid 5156] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5155] <... futex resumed>) = 0 [pid 5155] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5156] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5155] <... futex resumed>) = 0 [pid 5155] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5156] <... open resumed>) = 4 [pid 5156] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5155] <... futex resumed>) = 0 [pid 5156] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5155] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5156] <... open resumed>) = 5 [pid 5155] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5156] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5155] <... futex resumed>) = 0 [pid 5156] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5155] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5156] <... mmap resumed>) = 0x20000000 [pid 5155] <... futex resumed>) = 0 [pid 5156] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5155] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5156] <... futex resumed>) = 0 [pid 5155] <... futex resumed>) = 0 [pid 5155] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5156] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5155] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5155] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5155] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5155] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5157 attached [pid 5157] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5155] <... clone3 resumed> => {parent_tid=[5157]}, 88) = 5157 [pid 5157] <... rseq resumed>) = 0 [pid 5155] rt_sigprocmask(SIG_SETMASK, [], [pid 5157] set_robust_list(0x7f3dc0d559a0, 24 [pid 5155] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5157] <... set_robust_list resumed>) = 0 [pid 5155] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5157] rt_sigprocmask(SIG_SETMASK, [], [pid 5155] <... futex resumed>) = 0 [pid 5155] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5157] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5157] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5156] <... futex resumed>) = ? [pid 5155] <... futex resumed>) = ? [pid 5156] +++ killed by SIGBUS +++ [pid 5157] +++ killed by SIGBUS +++ [pid 5155] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5155, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./38", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./38/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./38/binderfs") = 0 [ 76.231051][ T5156] loop0: detected capacity change from 0 to 2048 [ 76.241954][ T5156] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./38/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./38/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./38/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./38/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./38/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./38/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./38") = 0 mkdir("./39", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5158 ./strace-static-x86_64: Process 5158 attached [pid 5158] set_robust_list(0x5555562186a0, 24) = 0 [pid 5158] chdir("./39") = 0 [pid 5158] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5158] setpgid(0, 0) = 0 [pid 5158] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5158] write(3, "1000", 4) = 4 [pid 5158] close(3) = 0 [pid 5158] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5158] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5158] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5158] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5158] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5158] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5158] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5158] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5159 attached => {parent_tid=[5159]}, 88) = 5159 [pid 5159] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5158] rt_sigprocmask(SIG_SETMASK, [], [pid 5159] <... rseq resumed>) = 0 [pid 5158] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5159] set_robust_list(0x7f3dc90769a0, 24 [pid 5158] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5159] <... set_robust_list resumed>) = 0 [pid 5158] <... futex resumed>) = 0 [pid 5159] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5158] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5159] memfd_create("syzkaller", 0) = 3 [pid 5159] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5159] 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 5159] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5159] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5159] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5159] close(3) = 0 [pid 5159] mkdir("./file0", 0777) = 0 [pid 5159] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5159] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5159] chdir("./file0") = 0 [pid 5159] ioctl(4, LOOP_CLR_FD) = 0 [pid 5159] close(4) = 0 [pid 5159] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5158] <... futex resumed>) = 0 [pid 5158] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5159] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5158] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5159] <... open resumed>) = 4 [pid 5159] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5159] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5158] <... futex resumed>) = 0 [pid 5158] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5159] <... futex resumed>) = 0 [pid 5159] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5159] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5159] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5158] <... futex resumed>) = 1 [pid 5158] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5158] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5159] <... futex resumed>) = 0 [pid 5159] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5158] <... futex resumed>) = 1 [pid 5158] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5159] <... futex resumed>) = 0 [pid 5159] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5159] +++ killed by SIGBUS +++ [pid 5158] <... futex resumed>) = ? [pid 5158] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5158, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./39", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./39/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./39/binderfs") = 0 umount2("./39/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./39/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./39/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./39/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./39/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./39/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./39") = 0 mkdir("./40", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5160 attached , child_tidptr=0x555556218690) = 5160 [pid 5160] set_robust_list(0x5555562186a0, 24) = 0 [ 76.336713][ T5159] loop0: detected capacity change from 0 to 2048 [ 76.348918][ T5159] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5160] chdir("./40") = 0 [pid 5160] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5160] setpgid(0, 0) = 0 [pid 5160] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5160] write(3, "1000", 4) = 4 [pid 5160] close(3) = 0 [pid 5160] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5160] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5160] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5160] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5160] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5160] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5160] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5160] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5161]}, 88) = 5161 [pid 5160] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5160] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5160] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5161 attached [pid 5161] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5161] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5161] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5161] memfd_create("syzkaller", 0) = 3 [pid 5161] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5161] 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 5161] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5161] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5161] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5161] close(3) = 0 [pid 5161] mkdir("./file0", 0777) = 0 [pid 5161] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5161] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5161] chdir("./file0") = 0 [pid 5161] ioctl(4, LOOP_CLR_FD) = 0 [pid 5161] close(4) = 0 [pid 5161] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5160] <... futex resumed>) = 0 [pid 5160] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5161] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5160] <... futex resumed>) = 0 [pid 5160] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5161] <... open resumed>) = 4 [pid 5161] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5160] <... futex resumed>) = 0 [pid 5161] <... futex resumed>) = 1 [pid 5160] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5161] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5160] <... futex resumed>) = 0 [pid 5161] <... open resumed>) = 5 [pid 5160] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5161] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5160] <... futex resumed>) = 0 [pid 5161] <... futex resumed>) = 1 [pid 5160] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5161] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5160] <... futex resumed>) = 0 [pid 5160] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5160] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5160] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5161] <... mmap resumed>) = 0x20000000 [pid 5160] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5161] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5160] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5161] <... futex resumed>) = 0 [pid 5160] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5161] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 5162 attached [pid 5160] <... clone3 resumed> => {parent_tid=[5162]}, 88) = 5162 [pid 5160] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5162] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5160] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5160] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5162] <... rseq resumed>) = 0 [pid 5162] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5162] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5162] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5160] <... futex resumed>) = ? [pid 5161] <... futex resumed>) = ? [pid 5161] +++ killed by SIGBUS +++ [pid 5162] +++ killed by SIGBUS +++ [pid 5160] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5160, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./40", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./40/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./40/binderfs") = 0 [ 76.426515][ T5161] loop0: detected capacity change from 0 to 2048 [ 76.445869][ T5161] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./40/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./40/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./40/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./40/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./40/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./40/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./40") = 0 mkdir("./41", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5163 attached , child_tidptr=0x555556218690) = 5163 [pid 5163] set_robust_list(0x5555562186a0, 24) = 0 [pid 5163] chdir("./41") = 0 [pid 5163] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5163] setpgid(0, 0) = 0 [pid 5163] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5163] write(3, "1000", 4) = 4 [pid 5163] close(3) = 0 [pid 5163] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5163] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5163] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5163] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5163] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5163] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5163] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5163] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5164]}, 88) = 5164 [pid 5163] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5163] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5164 attached ) = 0 [pid 5164] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5164] set_robust_list(0x7f3dc90769a0, 24 [pid 5163] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5164] <... set_robust_list resumed>) = 0 [pid 5164] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5164] memfd_create("syzkaller", 0) = 3 [pid 5164] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5164] 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 5164] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5164] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5164] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5164] close(3) = 0 [pid 5164] mkdir("./file0", 0777) = 0 [pid 5164] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5164] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5164] chdir("./file0") = 0 [pid 5164] ioctl(4, LOOP_CLR_FD) = 0 [pid 5164] close(4) = 0 [pid 5164] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5164] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5163] <... futex resumed>) = 0 [pid 5163] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5163] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5164] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5164] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5164] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5163] <... futex resumed>) = 0 [pid 5163] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5164] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5163] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5164] <... open resumed>) = 5 [pid 5164] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5163] <... futex resumed>) = 0 [pid 5163] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5164] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5163] <... futex resumed>) = 0 [pid 5163] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5163] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5163] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5164] <... mmap resumed>) = 0x20000000 [pid 5163] <... mprotect resumed>) = 0 [pid 5164] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5164] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5163] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5163] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5165 attached [pid 5165] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5163] <... clone3 resumed> => {parent_tid=[5165]}, 88) = 5165 [pid 5165] <... rseq resumed>) = 0 [pid 5163] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5165] set_robust_list(0x7f3dc0d559a0, 24 [pid 5163] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5165] <... set_robust_list resumed>) = 0 [pid 5163] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5165] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5165] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5163] <... futex resumed>) = ? [pid 5164] <... futex resumed>) = ? [pid 5164] +++ killed by SIGBUS +++ [pid 5165] +++ killed by SIGBUS +++ [pid 5163] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5163, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./41", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./41", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./41/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./41/binderfs") = 0 umount2("./41/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./41/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./41/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./41/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 76.567063][ T5164] loop0: detected capacity change from 0 to 2048 [ 76.578482][ T5164] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./41/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./41/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./41") = 0 mkdir("./42", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5166 ./strace-static-x86_64: Process 5166 attached [pid 5166] set_robust_list(0x5555562186a0, 24) = 0 [pid 5166] chdir("./42") = 0 [pid 5166] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5166] setpgid(0, 0) = 0 [pid 5166] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5166] write(3, "1000", 4) = 4 [pid 5166] close(3) = 0 [pid 5166] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5166] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5166] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5166] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5166] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5166] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5166] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5166] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5167]}, 88) = 5167 [pid 5166] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5166] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5166] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5167 attached [pid 5167] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5167] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5167] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5167] memfd_create("syzkaller", 0) = 3 [pid 5167] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5167] 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 5167] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5167] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5167] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5167] close(3) = 0 [pid 5167] mkdir("./file0", 0777) = 0 [pid 5167] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5167] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5167] chdir("./file0") = 0 [pid 5167] ioctl(4, LOOP_CLR_FD) = 0 [pid 5167] close(4) = 0 [pid 5167] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5167] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5166] <... futex resumed>) = 0 [pid 5166] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5167] <... futex resumed>) = 0 [pid 5166] <... futex resumed>) = 1 [pid 5167] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5166] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5167] <... open resumed>) = 4 [pid 5167] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5166] <... futex resumed>) = 0 [pid 5167] <... futex resumed>) = 1 [pid 5166] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5167] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5166] <... futex resumed>) = 0 [pid 5167] <... open resumed>) = 5 [pid 5166] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5167] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5166] <... futex resumed>) = 0 [pid 5166] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5167] <... futex resumed>) = 1 [pid 5166] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5167] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5166] <... futex resumed>) = 0 [pid 5167] <... mmap resumed>) = 0x20000000 [pid 5166] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5167] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5167] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5166] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5166] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5166] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5166] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5168 attached [pid 5168] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5166] <... clone3 resumed> => {parent_tid=[5168]}, 88) = 5168 [pid 5168] <... rseq resumed>) = 0 [pid 5166] rt_sigprocmask(SIG_SETMASK, [], [pid 5168] set_robust_list(0x7f3dc0d559a0, 24 [pid 5166] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5168] <... set_robust_list resumed>) = 0 [pid 5166] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5168] rt_sigprocmask(SIG_SETMASK, [], [pid 5166] <... futex resumed>) = 0 [pid 5168] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5166] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5168] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5166] <... futex resumed>) = ? [pid 5167] <... futex resumed>) = ? [pid 5167] +++ killed by SIGBUS +++ [pid 5168] +++ killed by SIGBUS +++ [pid 5166] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5166, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./42", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./42/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./42/binderfs") = 0 umount2("./42/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./42/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./42/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./42/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./42/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./42/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 [ 76.683049][ T5167] loop0: detected capacity change from 0 to 2048 [ 76.705737][ T5167] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./42") = 0 mkdir("./43", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5169 attached , child_tidptr=0x555556218690) = 5169 [pid 5169] set_robust_list(0x5555562186a0, 24) = 0 [pid 5169] chdir("./43") = 0 [pid 5169] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5169] setpgid(0, 0) = 0 [pid 5169] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5169] write(3, "1000", 4) = 4 [pid 5169] close(3) = 0 [pid 5169] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5169] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5169] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5169] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5169] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5169] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5169] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5169] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5170 attached [pid 5170] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5170] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5170] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5170] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5169] <... clone3 resumed> => {parent_tid=[5170]}, 88) = 5170 [pid 5169] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5169] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5170] <... futex resumed>) = 0 [pid 5169] <... futex resumed>) = 1 [pid 5169] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5170] memfd_create("syzkaller", 0) = 3 [pid 5170] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5170] 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 5170] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5170] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5170] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5170] close(3) = 0 [pid 5170] mkdir("./file0", 0777) = 0 [pid 5170] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5170] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5170] chdir("./file0") = 0 [pid 5170] ioctl(4, LOOP_CLR_FD) = 0 [ 76.792249][ T5170] __do_sys_memfd_create: 33 callbacks suppressed [ 76.792267][ T5170] syz-executor183[5170]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 76.821074][ T5170] loop0: detected capacity change from 0 to 2048 [ 76.832794][ T5170] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5170] close(4) = 0 [pid 5170] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5169] <... futex resumed>) = 0 [pid 5169] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5170] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5169] <... futex resumed>) = 0 [pid 5169] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5170] <... open resumed>) = 4 [pid 5170] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5169] <... futex resumed>) = 0 [pid 5169] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5169] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5170] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5170] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5169] <... futex resumed>) = 0 [pid 5170] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5169] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5170] <... futex resumed>) = 0 [pid 5169] <... futex resumed>) = 1 [pid 5170] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5169] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5169] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5170] <... mmap resumed>) = 0x20000000 [pid 5169] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5169] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5169] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5169] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5171 attached => {parent_tid=[5171]}, 88) = 5171 [pid 5171] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5169] rt_sigprocmask(SIG_SETMASK, [], [pid 5171] <... rseq resumed>) = 0 [pid 5169] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5171] set_robust_list(0x7f3dc0d559a0, 24 [pid 5170] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5171] <... set_robust_list resumed>) = 0 [pid 5169] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5171] rt_sigprocmask(SIG_SETMASK, [], [pid 5169] <... futex resumed>) = 0 [pid 5171] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5169] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5171] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5169] <... futex resumed>) = ? [pid 5171] +++ killed by SIGBUS +++ [pid 5170] <... futex resumed>) = ? [pid 5170] +++ killed by SIGBUS +++ [pid 5169] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5169, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./43", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./43/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./43/binderfs") = 0 umount2("./43/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./43/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./43/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./43/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./43/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./43/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./43") = 0 mkdir("./44", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5172 attached , child_tidptr=0x555556218690) = 5172 [pid 5172] set_robust_list(0x5555562186a0, 24) = 0 [pid 5172] chdir("./44") = 0 [pid 5172] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5172] setpgid(0, 0) = 0 [pid 5172] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5172] write(3, "1000", 4) = 4 [pid 5172] close(3) = 0 [pid 5172] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5172] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5172] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5172] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5172] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5172] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5172] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5172] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5173]}, 88) = 5173 [pid 5172] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 ./strace-static-x86_64: Process 5173 attached [pid 5172] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5172] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5173] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5173] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5173] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5173] memfd_create("syzkaller", 0) = 3 [pid 5173] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5173] 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 5173] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5173] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5173] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5173] close(3) = 0 [pid 5173] mkdir("./file0", 0777) = 0 [ 76.901609][ T5173] syz-executor183[5173]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 76.935809][ T5173] loop0: detected capacity change from 0 to 2048 [pid 5173] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5173] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5173] chdir("./file0") = 0 [pid 5173] ioctl(4, LOOP_CLR_FD) = 0 [pid 5173] close(4) = 0 [pid 5173] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5172] <... futex resumed>) = 0 [pid 5173] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5172] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5172] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5173] <... open resumed>) = 4 [pid 5173] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5172] <... futex resumed>) = 0 [pid 5173] <... futex resumed>) = 1 [pid 5172] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5173] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5172] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5173] <... open resumed>) = 5 [pid 5173] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5172] <... futex resumed>) = 0 [pid 5172] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5172] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5172] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5173] <... futex resumed>) = 1 [pid 5172] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5173] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5173] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5174] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5173] <... futex resumed>) = 0 [pid 5173] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5172] <... clone3 resumed> => {parent_tid=[5174]}, 88) = 5174 [pid 5174] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5174] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5174] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5172] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5172] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5174] <... futex resumed>) = 0 [pid 5172] <... futex resumed>) = 1 [pid 5172] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5174] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5172] <... futex resumed>) = ? [pid 5173] <... futex resumed>) = ? [pid 5174] +++ killed by SIGBUS +++ [pid 5173] +++ killed by SIGBUS +++ [pid 5172] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5172, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./44", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./44/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./44/binderfs") = 0 umount2("./44/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./44/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./44/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./44/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./44/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 [ 76.948322][ T5173] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./44/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./44") = 0 mkdir("./45", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5175 attached , child_tidptr=0x555556218690) = 5175 [pid 5175] set_robust_list(0x5555562186a0, 24) = 0 [pid 5175] chdir("./45") = 0 [pid 5175] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5175] setpgid(0, 0) = 0 [pid 5175] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5175] write(3, "1000", 4) = 4 [pid 5175] close(3) = 0 [pid 5175] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5175] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5175] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5175] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5175] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5175] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5175] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5175] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5176 attached => {parent_tid=[5176]}, 88) = 5176 [pid 5176] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5175] rt_sigprocmask(SIG_SETMASK, [], [pid 5176] set_robust_list(0x7f3dc90769a0, 24 [pid 5175] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5176] <... set_robust_list resumed>) = 0 [pid 5175] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5176] rt_sigprocmask(SIG_SETMASK, [], [pid 5175] <... futex resumed>) = 0 [pid 5176] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5175] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5176] memfd_create("syzkaller", 0) = 3 [pid 5176] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5176] 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 5176] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5176] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5176] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5176] close(3) = 0 [pid 5176] mkdir("./file0", 0777) = 0 [ 77.007574][ T5176] syz-executor183[5176]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 77.040235][ T5176] loop0: detected capacity change from 0 to 2048 [pid 5176] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5176] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5176] chdir("./file0") = 0 [pid 5176] ioctl(4, LOOP_CLR_FD) = 0 [pid 5176] close(4) = 0 [pid 5176] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5175] <... futex resumed>) = 0 [pid 5175] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5175] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5176] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5176] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5175] <... futex resumed>) = 0 [pid 5176] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5175] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5176] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5175] <... futex resumed>) = 0 [pid 5175] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5176] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5176] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5175] <... futex resumed>) = 0 [pid 5176] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5175] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5176] <... futex resumed>) = 0 [pid 5175] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5176] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5175] <... futex resumed>) = 0 [pid 5175] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5175] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5176] <... mmap resumed>) = 0x20000000 [pid 5176] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5175] <... mprotect resumed>) = 0 [pid 5176] <... futex resumed>) = 0 [pid 5176] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5175] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5175] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5177 attached => {parent_tid=[5177]}, 88) = 5177 [pid 5177] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5175] rt_sigprocmask(SIG_SETMASK, [], [pid 5177] <... rseq resumed>) = 0 [pid 5175] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5177] set_robust_list(0x7f3dc0d559a0, 24 [pid 5175] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5177] <... set_robust_list resumed>) = 0 [pid 5175] <... futex resumed>) = 0 [pid 5177] rt_sigprocmask(SIG_SETMASK, [], [pid 5175] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5177] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5177] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5176] <... futex resumed>) = ? [pid 5177] +++ killed by SIGBUS +++ [pid 5176] +++ killed by SIGBUS +++ [pid 5175] <... futex resumed>) = ? [pid 5175] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5175, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./45", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./45/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./45/binderfs") = 0 [ 77.050759][ T5176] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./45/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./45/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./45/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./45/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./45/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./45/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./45") = 0 mkdir("./46", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5178 attached [pid 5178] set_robust_list(0x5555562186a0, 24) = 0 [pid 5178] chdir("./46") = 0 [pid 5178] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5178] setpgid(0, 0) = 0 [pid 5178] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5178 [pid 5178] <... openat resumed>) = 3 [pid 5178] write(3, "1000", 4) = 4 [pid 5178] close(3) = 0 [pid 5178] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5178] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5178] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5178] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5178] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5178] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5178] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5178] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5179 attached => {parent_tid=[5179]}, 88) = 5179 [pid 5179] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5178] rt_sigprocmask(SIG_SETMASK, [], [pid 5179] set_robust_list(0x7f3dc90769a0, 24 [pid 5178] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5179] <... set_robust_list resumed>) = 0 [pid 5179] rt_sigprocmask(SIG_SETMASK, [], [pid 5178] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5179] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5178] <... futex resumed>) = 0 [pid 5179] memfd_create("syzkaller", 0 [pid 5178] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5179] <... memfd_create resumed>) = 3 [pid 5179] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5179] 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 5179] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5179] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5179] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5179] close(3) = 0 [pid 5179] mkdir("./file0", 0777) = 0 [pid 5179] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5179] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5179] chdir("./file0") = 0 [pid 5179] ioctl(4, LOOP_CLR_FD) = 0 [pid 5179] close(4) = 0 [pid 5179] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5179] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5178] <... futex resumed>) = 0 [pid 5178] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5179] <... futex resumed>) = 0 [pid 5178] <... futex resumed>) = 1 [pid 5179] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5178] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5179] <... open resumed>) = 4 [pid 5179] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5179] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5178] <... futex resumed>) = 0 [pid 5178] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5179] <... futex resumed>) = 0 [pid 5178] <... futex resumed>) = 1 [pid 5179] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5178] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5179] <... open resumed>) = 5 [pid 5179] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5178] <... futex resumed>) = 0 [pid 5179] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5178] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5179] <... mmap resumed>) = 0x20000000 [pid 5178] <... futex resumed>) = 0 [pid 5179] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5178] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5178] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5179] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5178] <... futex resumed>) = ? [pid 5179] +++ killed by SIGBUS +++ [pid 5178] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5178, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./46", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./46/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./46/binderfs") = 0 umount2("./46/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./46/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./46/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 77.119035][ T5179] syz-executor183[5179]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 77.145140][ T5179] loop0: detected capacity change from 0 to 2048 [ 77.156452][ T5179] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./46/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./46/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./46/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./46") = 0 mkdir("./47", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5180 attached , child_tidptr=0x555556218690) = 5180 [pid 5180] set_robust_list(0x5555562186a0, 24) = 0 [pid 5180] chdir("./47") = 0 [pid 5180] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5180] setpgid(0, 0) = 0 [pid 5180] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5180] write(3, "1000", 4) = 4 [pid 5180] close(3) = 0 [pid 5180] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5180] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5180] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5180] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5180] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5180] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5180] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5180] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5181]}, 88) = 5181 [pid 5180] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5181 attached [pid 5181] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5180] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5180] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5181] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5181] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5180] <... futex resumed>) = 0 [pid 5180] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5181] memfd_create("syzkaller", 0) = 3 [pid 5181] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5181] 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 [ 77.239235][ T5181] syz-executor183[5181]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [pid 5181] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5181] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5181] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5181] close(3) = 0 [pid 5181] mkdir("./file0", 0777) = 0 [pid 5181] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5181] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5181] chdir("./file0") = 0 [pid 5181] ioctl(4, LOOP_CLR_FD) = 0 [pid 5181] close(4) = 0 [pid 5181] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5181] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5180] <... futex resumed>) = 0 [pid 5180] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5181] <... futex resumed>) = 0 [pid 5180] <... futex resumed>) = 1 [pid 5181] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5180] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5181] <... open resumed>) = 4 [pid 5181] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5180] <... futex resumed>) = 0 [pid 5181] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5180] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5181] <... futex resumed>) = 0 [pid 5180] <... futex resumed>) = 1 [pid 5181] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5181] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5181] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5180] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5180] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5181] <... futex resumed>) = 0 [pid 5180] <... futex resumed>) = 1 [pid 5181] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5180] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5180] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5181] <... mmap resumed>) = 0x20000000 [pid 5180] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5181] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5181] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5180] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5180] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5180] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5182 attached => {parent_tid=[5182]}, 88) = 5182 [pid 5182] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5180] rt_sigprocmask(SIG_SETMASK, [], [pid 5182] <... rseq resumed>) = 0 [pid 5180] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5182] set_robust_list(0x7f3dc0d559a0, 24 [pid 5180] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5182] <... set_robust_list resumed>) = 0 [pid 5180] <... futex resumed>) = 0 [pid 5180] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5182] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5182] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5181] <... futex resumed>) = ? [pid 5180] <... futex resumed>) = ? [pid 5182] +++ killed by SIGBUS +++ [pid 5181] +++ killed by SIGBUS +++ [pid 5180] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5180, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./47", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./47/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./47/binderfs") = 0 [ 77.289512][ T5181] loop0: detected capacity change from 0 to 2048 [ 77.311859][ T5181] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./47/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./47/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./47/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./47/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./47/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./47/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./47") = 0 mkdir("./48", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5183 attached , child_tidptr=0x555556218690) = 5183 [pid 5183] set_robust_list(0x5555562186a0, 24) = 0 [pid 5183] chdir("./48") = 0 [pid 5183] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5183] setpgid(0, 0) = 0 [pid 5183] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5183] write(3, "1000", 4) = 4 [pid 5183] close(3) = 0 [pid 5183] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5183] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5183] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5183] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5183] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5183] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5183] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5183] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5184 attached => {parent_tid=[5184]}, 88) = 5184 [pid 5184] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5184] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5184] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5184] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5183] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5183] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5184] <... futex resumed>) = 0 [pid 5183] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5184] memfd_create("syzkaller", 0) = 3 [pid 5184] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5184] 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 5184] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5184] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5184] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5184] close(3) = 0 [pid 5184] mkdir("./file0", 0777) = 0 [pid 5184] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5184] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5184] chdir("./file0") = 0 [pid 5184] ioctl(4, LOOP_CLR_FD) = 0 [pid 5184] close(4) = 0 [pid 5184] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5184] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5183] <... futex resumed>) = 0 [pid 5183] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5184] <... futex resumed>) = 0 [pid 5183] <... futex resumed>) = 1 [pid 5184] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5183] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5184] <... open resumed>) = 4 [pid 5184] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5183] <... futex resumed>) = 0 [pid 5183] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5183] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5184] <... futex resumed>) = 1 [pid 5184] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5184] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5183] <... futex resumed>) = 0 [pid 5183] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5183] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5183] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5183] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5183] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5183] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5185]}, 88) = 5185 [pid 5183] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5183] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5183] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5185 attached [pid 5185] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5185] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5185] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5185] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 [pid 5185] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5183] <... futex resumed>) = 0 [pid 5183] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5183] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5185] <... futex resumed>) = 1 [pid 5185] write(6, "\x2e\x2f\x66\x69\x6c\x65\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5184] <... futex resumed>) = 1 [ 77.417328][ T5184] syz-executor183[5184]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 77.442499][ T5184] loop0: detected capacity change from 0 to 2048 [ 77.454621][ T5184] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5184] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5183] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5183] futex(0x7f3dc91426ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5183] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d14000 [pid 5183] mprotect(0x7f3dc0d15000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5183] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5183] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d34990, parent_tid=0x7f3dc0d34990, exit_signal=0, stack=0x7f3dc0d14000, stack_size=0x20300, tls=0x7f3dc0d346c0}./strace-static-x86_64: Process 5186 attached => {parent_tid=[5186]}, 88) = 5186 [pid 5186] rseq(0x7f3dc0d34fe0, 0x20, 0, 0x53053053 [pid 5183] rt_sigprocmask(SIG_SETMASK, [], [pid 5186] <... rseq resumed>) = 0 [pid 5183] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5186] set_robust_list(0x7f3dc0d349a0, 24 [pid 5183] futex(0x7f3dc91426e8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5186] <... set_robust_list resumed>) = 0 [pid 5183] <... futex resumed>) = 0 [pid 5186] rt_sigprocmask(SIG_SETMASK, [], [pid 5183] futex(0x7f3dc91426ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5186] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5186] ftruncate(4, 2 [pid 5183] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5186] <... ftruncate resumed>) = 0 [pid 5185] <... write resumed>) = 348160 [pid 5184] <... mmap resumed>) = 0x20000000 [pid 5184] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5184] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5185] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5185] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5186] futex(0x7f3dc91426ec, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5186] futex(0x7f3dc91426e8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5183] exit_group(0) = ? [pid 5185] <... futex resumed>) = ? [pid 5186] <... futex resumed>) = ? [pid 5185] +++ exited with 0 +++ [pid 5186] +++ exited with 0 +++ [pid 5184] <... futex resumed>) = ? [pid 5184] +++ exited with 0 +++ [pid 5183] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5183, si_uid=0, si_status=0, si_utime=0, si_stime=13 /* 0.13 s */} --- umount2("./48", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./48/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./48/binderfs") = 0 umount2("./48/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./48/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./48/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./48/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./48/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./48/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./48") = 0 mkdir("./49", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5187 ./strace-static-x86_64: Process 5187 attached [pid 5187] set_robust_list(0x5555562186a0, 24) = 0 [pid 5187] chdir("./49") = 0 [pid 5187] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5187] setpgid(0, 0) = 0 [pid 5187] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5187] write(3, "1000", 4) = 4 [pid 5187] close(3) = 0 [pid 5187] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5187] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5187] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5187] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5187] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5187] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5187] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5187] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5188]}, 88) = 5188 [pid 5187] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5187] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5187] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5188 attached [pid 5188] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5188] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5188] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5188] memfd_create("syzkaller", 0) = 3 [pid 5188] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5188] 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 5188] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5188] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5188] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5188] close(3) = 0 [pid 5188] mkdir("./file0", 0777) = 0 [pid 5188] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5188] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5188] chdir("./file0") = 0 [pid 5188] ioctl(4, LOOP_CLR_FD) = 0 [pid 5188] close(4) = 0 [pid 5188] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5187] <... futex resumed>) = 0 [pid 5187] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5188] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5187] <... futex resumed>) = 0 [pid 5187] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5188] <... open resumed>) = 4 [pid 5188] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5187] <... futex resumed>) = 0 [pid 5187] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5188] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5188] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5188] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5187] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5187] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5188] <... futex resumed>) = 0 [pid 5187] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5188] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5187] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5188] <... mmap resumed>) = 0x20000000 [pid 5187] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5188] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5187] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5188] <... futex resumed>) = 0 [pid 5187] <... mprotect resumed>) = 0 [pid 5188] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5187] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5187] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5189]}, 88) = 5189 [pid 5187] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5187] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5187] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5189 attached [pid 5189] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5189] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5189] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5189] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5188] <... futex resumed>) = ? [pid 5188] +++ killed by SIGBUS +++ [pid 5187] <... futex resumed>) = ? [pid 5189] +++ killed by SIGBUS +++ [pid 5187] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5187, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./49", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 77.674286][ T5188] syz-executor183[5188]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 77.696999][ T5188] loop0: detected capacity change from 0 to 2048 [ 77.708909][ T5188] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./49", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./49/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./49/binderfs") = 0 umount2("./49/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./49/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./49/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./49/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./49/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./49/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./49") = 0 mkdir("./50", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5190 ./strace-static-x86_64: Process 5190 attached [pid 5190] set_robust_list(0x5555562186a0, 24) = 0 [pid 5190] chdir("./50") = 0 [pid 5190] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5190] setpgid(0, 0) = 0 [pid 5190] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5190] write(3, "1000", 4) = 4 [pid 5190] close(3) = 0 [pid 5190] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5190] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5190] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5190] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5190] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5190] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5190] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5191 attached => {parent_tid=[5191]}, 88) = 5191 [pid 5190] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5190] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5191] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5190] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5191] <... rseq resumed>) = 0 [pid 5191] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5191] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5191] memfd_create("syzkaller", 0) = 3 [pid 5191] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5191] 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 5191] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5191] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5191] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5191] close(3) = 0 [pid 5191] mkdir("./file0", 0777) = 0 [pid 5191] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5191] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5191] chdir("./file0") = 0 [pid 5191] ioctl(4, LOOP_CLR_FD) = 0 [pid 5191] close(4) = 0 [pid 5191] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5190] <... futex resumed>) = 0 [pid 5191] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5190] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5191] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5190] <... futex resumed>) = 0 [pid 5191] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5190] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5191] <... open resumed>) = 4 [pid 5191] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5190] <... futex resumed>) = 0 [pid 5190] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5191] <... futex resumed>) = 1 [pid 5191] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5191] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5190] <... futex resumed>) = 0 [pid 5190] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5191] <... futex resumed>) = 1 [pid 5190] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5191] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5191] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5191] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5190] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5190] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5192]}, 88) = 5192 [pid 5190] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5190] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5190] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5192 attached [pid 5192] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5192] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5192] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5192] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5191] <... futex resumed>) = ? [pid 5192] +++ killed by SIGBUS +++ [pid 5191] +++ killed by SIGBUS +++ [pid 5190] <... futex resumed>) = ? [pid 5190] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5190, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./50", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./50/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./50/binderfs") = 0 umount2("./50/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./50/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./50/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./50/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./50/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 [ 77.797239][ T5191] syz-executor183[5191]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 77.822102][ T5191] loop0: detected capacity change from 0 to 2048 [ 77.834432][ T5191] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./50/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./50") = 0 mkdir("./51", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5193 attached , child_tidptr=0x555556218690) = 5193 [pid 5193] set_robust_list(0x5555562186a0, 24) = 0 [pid 5193] chdir("./51") = 0 [pid 5193] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5193] setpgid(0, 0) = 0 [pid 5193] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5193] write(3, "1000", 4) = 4 [pid 5193] close(3) = 0 [pid 5193] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5193] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5193] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5193] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5193] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5193] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5193] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5193] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5194 attached [pid 5194] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5193] <... clone3 resumed> => {parent_tid=[5194]}, 88) = 5194 [pid 5194] <... rseq resumed>) = 0 [pid 5193] rt_sigprocmask(SIG_SETMASK, [], [pid 5194] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5193] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5194] rt_sigprocmask(SIG_SETMASK, [], [pid 5193] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5194] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5194] memfd_create("syzkaller", 0 [pid 5193] <... futex resumed>) = 0 [pid 5193] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5194] <... memfd_create resumed>) = 3 [pid 5194] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5194] 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 5194] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5194] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5194] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5194] close(3) = 0 [pid 5194] mkdir("./file0", 0777) = 0 [pid 5194] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5194] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5194] chdir("./file0") = 0 [pid 5194] ioctl(4, LOOP_CLR_FD) = 0 [pid 5194] close(4) = 0 [pid 5194] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5194] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5193] <... futex resumed>) = 0 [pid 5193] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5194] <... futex resumed>) = 0 [pid 5193] <... futex resumed>) = 1 [pid 5194] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5193] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5194] <... open resumed>) = 4 [pid 5194] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5194] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5193] <... futex resumed>) = 0 [pid 5193] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5194] <... futex resumed>) = 0 [pid 5193] <... futex resumed>) = 1 [pid 5194] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5193] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5194] <... open resumed>) = 5 [pid 5194] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5193] <... futex resumed>) = 0 [pid 5194] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5193] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5194] <... mmap resumed>) = 0x20000000 [pid 5193] <... futex resumed>) = 0 [pid 5194] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5193] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5194] <... futex resumed>) = 0 [pid 5194] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5193] <... futex resumed>) = 0 [pid 5194] +++ killed by SIGBUS +++ [pid 5193] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5193, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./51", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./51/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 77.917731][ T5194] syz-executor183[5194]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 77.940595][ T5194] loop0: detected capacity change from 0 to 2048 [ 77.952550][ T5194] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) newfstatat(AT_FDCWD, "./51/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./51/binderfs") = 0 umount2("./51/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./51/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./51/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./51/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./51/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./51/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./51") = 0 mkdir("./52", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5195 attached , child_tidptr=0x555556218690) = 5195 [pid 5195] set_robust_list(0x5555562186a0, 24) = 0 [pid 5195] chdir("./52") = 0 [pid 5195] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5195] setpgid(0, 0) = 0 [pid 5195] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5195] write(3, "1000", 4) = 4 [pid 5195] close(3) = 0 [pid 5195] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5195] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5195] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5195] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5195] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5195] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5195] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5195] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5196 attached => {parent_tid=[5196]}, 88) = 5196 [pid 5196] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5196] set_robust_list(0x7f3dc90769a0, 24 [pid 5195] rt_sigprocmask(SIG_SETMASK, [], [pid 5196] <... set_robust_list resumed>) = 0 [pid 5195] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5196] rt_sigprocmask(SIG_SETMASK, [], [pid 5195] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5196] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5195] <... futex resumed>) = 0 [pid 5196] memfd_create("syzkaller", 0 [pid 5195] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5196] <... memfd_create resumed>) = 3 [pid 5196] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5196] 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 5196] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5196] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5196] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5196] close(3) = 0 [pid 5196] mkdir("./file0", 0777) = 0 [pid 5196] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5196] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5196] chdir("./file0") = 0 [pid 5196] ioctl(4, LOOP_CLR_FD) = 0 [pid 5196] close(4) = 0 [pid 5196] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5196] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5195] <... futex resumed>) = 0 [pid 5195] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5196] <... futex resumed>) = 0 [pid 5195] <... futex resumed>) = 1 [pid 5196] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5195] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5196] <... open resumed>) = 4 [pid 5196] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5196] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5195] <... futex resumed>) = 0 [pid 5195] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5196] <... futex resumed>) = 0 [pid 5195] <... futex resumed>) = 1 [pid 5196] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5195] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5196] <... open resumed>) = 5 [pid 5196] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5195] <... futex resumed>) = 0 [pid 5196] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5195] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5196] <... mmap resumed>) = 0x20000000 [pid 5195] <... futex resumed>) = 0 [pid 5195] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5195] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5195] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5195] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5196] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5195] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5196] <... futex resumed>) = 0 [pid 5195] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5197 attached [pid 5196] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5197] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5195] <... clone3 resumed> => {parent_tid=[5197]}, 88) = 5197 [pid 5197] set_robust_list(0x7f3dc0d559a0, 24 [pid 5195] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5195] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5195] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5197] <... set_robust_list resumed>) = 0 [pid 5197] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5197] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5195] <... futex resumed>) = ? [pid 5196] <... futex resumed>) = ? [pid 5196] +++ killed by SIGBUS +++ [pid 5197] +++ killed by SIGBUS +++ [pid 5195] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5195, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./52", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./52/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 78.048782][ T5196] syz-executor183[5196]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 78.072390][ T5196] loop0: detected capacity change from 0 to 2048 [ 78.084425][ T5196] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) unlink("./52/binderfs") = 0 umount2("./52/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./52/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./52/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./52/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./52/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./52/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./52") = 0 mkdir("./53", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5198 ./strace-static-x86_64: Process 5198 attached [pid 5198] set_robust_list(0x5555562186a0, 24) = 0 [pid 5198] chdir("./53") = 0 [pid 5198] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5198] setpgid(0, 0) = 0 [pid 5198] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5198] write(3, "1000", 4) = 4 [pid 5198] close(3) = 0 [pid 5198] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5198] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5198] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5198] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5198] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5198] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5198] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5198] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5199 attached [pid 5199] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5198] <... clone3 resumed> => {parent_tid=[5199]}, 88) = 5199 [pid 5199] <... rseq resumed>) = 0 [pid 5198] rt_sigprocmask(SIG_SETMASK, [], [pid 5199] set_robust_list(0x7f3dc90769a0, 24 [pid 5198] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5199] <... set_robust_list resumed>) = 0 [pid 5198] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5199] rt_sigprocmask(SIG_SETMASK, [], [pid 5198] <... futex resumed>) = 0 [pid 5199] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5198] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5199] memfd_create("syzkaller", 0) = 3 [pid 5199] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5199] 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 5199] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5199] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5199] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5199] close(3) = 0 [pid 5199] mkdir("./file0", 0777) = 0 [pid 5199] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5199] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5199] chdir("./file0") = 0 [pid 5199] ioctl(4, LOOP_CLR_FD) = 0 [pid 5199] close(4) = 0 [pid 5199] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5198] <... futex resumed>) = 0 [pid 5198] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5198] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5199] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5199] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5199] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5198] <... futex resumed>) = 0 [pid 5198] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5199] <... futex resumed>) = 0 [pid 5199] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5198] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5199] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5198] <... futex resumed>) = 0 [pid 5198] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5198] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5198] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5199] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5198] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5199] <... mmap resumed>) = 0x20000000 [pid 5198] <... mprotect resumed>) = 0 [pid 5199] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5199] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5198] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5198] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5200]}, 88) = 5200 [pid 5198] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5198] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5200 attached ) = 0 [pid 5200] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5198] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5200] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5200] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5200] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5199] <... futex resumed>) = ? [pid 5198] <... futex resumed>) = ? [pid 5199] +++ killed by SIGBUS +++ [pid 5200] +++ killed by SIGBUS +++ [pid 5198] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5198, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./53", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./53", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./53/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./53/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./53/binderfs") = 0 [ 78.197178][ T5199] loop0: detected capacity change from 0 to 2048 [ 78.209610][ T5199] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./53/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./53/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./53/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./53/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./53/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./53/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./53") = 0 mkdir("./54", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5201 ./strace-static-x86_64: Process 5201 attached [pid 5201] set_robust_list(0x5555562186a0, 24) = 0 [pid 5201] chdir("./54") = 0 [pid 5201] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5201] setpgid(0, 0) = 0 [pid 5201] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5201] write(3, "1000", 4) = 4 [pid 5201] close(3) = 0 [pid 5201] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5201] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5201] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5201] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5201] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5201] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5201] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5201] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5202 attached [pid 5202] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5201] <... clone3 resumed> => {parent_tid=[5202]}, 88) = 5202 [pid 5202] <... rseq resumed>) = 0 [pid 5201] rt_sigprocmask(SIG_SETMASK, [], [pid 5202] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5201] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5202] rt_sigprocmask(SIG_SETMASK, [], [pid 5201] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5202] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5201] <... futex resumed>) = 0 [pid 5202] memfd_create("syzkaller", 0 [pid 5201] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5202] <... memfd_create resumed>) = 3 [pid 5202] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5202] 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 5202] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5202] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5202] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5202] close(3) = 0 [pid 5202] mkdir("./file0", 0777) = 0 [pid 5202] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5202] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5202] chdir("./file0") = 0 [pid 5202] ioctl(4, LOOP_CLR_FD) = 0 [pid 5202] close(4) = 0 [pid 5202] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5202] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5201] <... futex resumed>) = 0 [pid 5201] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5202] <... futex resumed>) = 0 [pid 5201] <... futex resumed>) = 1 [pid 5202] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5201] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5202] <... open resumed>) = 4 [pid 5202] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5201] <... futex resumed>) = 0 [pid 5202] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5201] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5202] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5201] <... futex resumed>) = 0 [pid 5202] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5201] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5202] <... open resumed>) = 5 [pid 5202] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5201] <... futex resumed>) = 0 [pid 5202] <... futex resumed>) = 1 [pid 5201] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5202] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5201] <... futex resumed>) = 0 [pid 5202] <... mmap resumed>) = 0x20000000 [pid 5201] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5201] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5201] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5201] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5201] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5203 attached [pid 5203] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5201] <... clone3 resumed> => {parent_tid=[5203]}, 88) = 5203 [pid 5202] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5201] rt_sigprocmask(SIG_SETMASK, [], [pid 5202] <... futex resumed>) = 0 [pid 5201] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5202] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5201] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5203] <... rseq resumed>) = 0 [pid 5201] <... futex resumed>) = 0 [pid 5203] set_robust_list(0x7f3dc0d559a0, 24 [pid 5201] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5203] <... set_robust_list resumed>) = 0 [pid 5203] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5203] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5202] <... futex resumed>) = ? [pid 5201] <... futex resumed>) = ? [pid 5203] +++ killed by SIGBUS +++ [pid 5202] +++ killed by SIGBUS +++ [pid 5201] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5201, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./54", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./54", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./54/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./54/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./54/binderfs") = 0 [ 78.339590][ T5202] loop0: detected capacity change from 0 to 2048 [ 78.351619][ T5202] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./54/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./54/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./54/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./54/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./54/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./54/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./54") = 0 mkdir("./55", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5204 ./strace-static-x86_64: Process 5204 attached [pid 5204] set_robust_list(0x5555562186a0, 24) = 0 [pid 5204] chdir("./55") = 0 [pid 5204] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5204] setpgid(0, 0) = 0 [pid 5204] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5204] write(3, "1000", 4) = 4 [pid 5204] close(3) = 0 [pid 5204] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5204] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5204] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5204] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5204] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5204] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5204] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5204] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5205]}, 88) = 5205 [pid 5204] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5204] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5204] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5205 attached [pid 5205] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5205] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5205] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5205] memfd_create("syzkaller", 0) = 3 [pid 5205] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5205] 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 5205] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5205] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5205] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5205] close(3) = 0 [pid 5205] mkdir("./file0", 0777) = 0 [pid 5205] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5205] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5205] chdir("./file0") = 0 [pid 5205] ioctl(4, LOOP_CLR_FD) = 0 [pid 5205] close(4) = 0 [pid 5205] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5204] <... futex resumed>) = 0 [pid 5205] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5204] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5205] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5204] <... futex resumed>) = 0 [pid 5205] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5204] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5205] <... open resumed>) = 4 [pid 5205] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5204] <... futex resumed>) = 0 [pid 5205] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5204] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5205] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5204] <... futex resumed>) = 0 [pid 5205] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5204] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5205] <... open resumed>) = 5 [pid 5205] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5204] <... futex resumed>) = 0 [pid 5205] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5204] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5205] <... mmap resumed>) = 0x20000000 [pid 5204] <... futex resumed>) = 0 [pid 5204] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5204] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5204] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5205] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5204] <... mprotect resumed>) = 0 [pid 5204] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5205] <... futex resumed>) = 0 [pid 5204] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5205] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 5206 attached [pid 5206] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5204] <... clone3 resumed> => {parent_tid=[5206]}, 88) = 5206 [pid 5206] <... rseq resumed>) = 0 [pid 5204] rt_sigprocmask(SIG_SETMASK, [], [pid 5206] set_robust_list(0x7f3dc0d559a0, 24 [pid 5204] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5206] <... set_robust_list resumed>) = 0 [pid 5206] rt_sigprocmask(SIG_SETMASK, [], [pid 5204] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5206] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5204] <... futex resumed>) = 0 [pid 5206] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5204] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5205] <... futex resumed>) = ? [pid 5204] <... futex resumed>) = ? [pid 5205] +++ killed by SIGBUS +++ [pid 5206] +++ killed by SIGBUS +++ [pid 5204] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5204, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./55", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./55", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./55/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./55/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./55/binderfs") = 0 umount2("./55/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./55/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./55/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./55/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 78.451996][ T5205] loop0: detected capacity change from 0 to 2048 [ 78.465263][ T5205] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./55/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./55/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./55") = 0 mkdir("./56", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5207 attached , child_tidptr=0x555556218690) = 5207 [pid 5207] set_robust_list(0x5555562186a0, 24) = 0 [pid 5207] chdir("./56") = 0 [pid 5207] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5207] setpgid(0, 0) = 0 [pid 5207] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5207] write(3, "1000", 4) = 4 [pid 5207] close(3) = 0 [pid 5207] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5207] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5207] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5207] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5207] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5207] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5207] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5207] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5208]}, 88) = 5208 [pid 5207] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5207] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5207] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5208 attached [pid 5208] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5208] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5208] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5208] memfd_create("syzkaller", 0) = 3 [pid 5208] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5208] 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 5208] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5208] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5208] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5208] close(3) = 0 [pid 5208] mkdir("./file0", 0777) = 0 [pid 5208] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5208] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5208] chdir("./file0") = 0 [pid 5208] ioctl(4, LOOP_CLR_FD) = 0 [pid 5208] close(4) = 0 [pid 5208] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5208] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5207] <... futex resumed>) = 0 [pid 5207] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5208] <... futex resumed>) = 0 [pid 5208] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5207] <... futex resumed>) = 1 [pid 5207] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5208] <... open resumed>) = 4 [pid 5208] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5208] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5207] <... futex resumed>) = 0 [pid 5207] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5208] <... futex resumed>) = 0 [pid 5208] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5207] <... futex resumed>) = 1 [pid 5208] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5207] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5208] <... futex resumed>) = 0 [pid 5207] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5208] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5207] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5208] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5207] <... futex resumed>) = 0 [pid 5208] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5207] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5208] <... mmap resumed>) = 0x20000000 [pid 5207] <... futex resumed>) = 0 [pid 5208] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5207] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5208] <... futex resumed>) = 0 [pid 5207] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5207] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5208] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5207] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5207] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5209 attached => {parent_tid=[5209]}, 88) = 5209 [pid 5207] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5207] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5207] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5209] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5209] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5209] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5209] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5208] <... futex resumed>) = ? [pid 5209] +++ killed by SIGBUS +++ [pid 5208] +++ killed by SIGBUS +++ [pid 5207] <... futex resumed>) = ? [pid 5207] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5207, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./56", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./56", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./56/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./56/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./56/binderfs") = 0 umount2("./56/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./56/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./56/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./56/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./56/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 [ 78.570570][ T5208] loop0: detected capacity change from 0 to 2048 [ 78.583998][ T5208] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./56/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./56") = 0 mkdir("./57", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5210 ./strace-static-x86_64: Process 5210 attached [pid 5210] set_robust_list(0x5555562186a0, 24) = 0 [pid 5210] chdir("./57") = 0 [pid 5210] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5210] setpgid(0, 0) = 0 [pid 5210] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5210] write(3, "1000", 4) = 4 [pid 5210] close(3) = 0 [pid 5210] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5210] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5210] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5210] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5210] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5210] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5210] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5210] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5211 attached [pid 5211] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5210] <... clone3 resumed> => {parent_tid=[5211]}, 88) = 5211 [pid 5211] <... rseq resumed>) = 0 [pid 5210] rt_sigprocmask(SIG_SETMASK, [], [pid 5211] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5210] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5211] rt_sigprocmask(SIG_SETMASK, [], [pid 5210] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5211] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5210] <... futex resumed>) = 0 [pid 5211] memfd_create("syzkaller", 0 [pid 5210] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5211] <... memfd_create resumed>) = 3 [pid 5211] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5211] 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 5211] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5211] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5211] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5211] close(3) = 0 [pid 5211] mkdir("./file0", 0777) = 0 [pid 5211] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5211] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5211] chdir("./file0") = 0 [pid 5211] ioctl(4, LOOP_CLR_FD) = 0 [pid 5211] close(4) = 0 [pid 5211] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5210] <... futex resumed>) = 0 [pid 5211] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5210] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5211] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5210] <... futex resumed>) = 0 [pid 5211] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5210] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5211] <... open resumed>) = 4 [pid 5211] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5210] <... futex resumed>) = 0 [pid 5211] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5210] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5211] <... futex resumed>) = 0 [pid 5210] <... futex resumed>) = 1 [pid 5211] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5210] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5211] <... open resumed>) = 5 [pid 5211] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5210] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5211] <... futex resumed>) = 0 [pid 5211] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5210] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5211] <... futex resumed>) = 0 [pid 5210] <... futex resumed>) = 1 [pid 5210] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5211] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5210] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5211] <... mmap resumed>) = 0x20000000 [pid 5211] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5211] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5210] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5210] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [ 78.683418][ T5211] loop0: detected capacity change from 0 to 2048 [ 78.699437][ T5211] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5210] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5210] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5212 attached [pid 5212] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5210] <... clone3 resumed> => {parent_tid=[5212]}, 88) = 5212 [pid 5212] <... rseq resumed>) = 0 [pid 5212] set_robust_list(0x7f3dc0d559a0, 24 [pid 5210] rt_sigprocmask(SIG_SETMASK, [], [pid 5212] <... set_robust_list resumed>) = 0 [pid 5210] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5212] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5212] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5210] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5212] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5210] <... futex resumed>) = 0 [pid 5212] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5210] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5211] <... futex resumed>) = ? [pid 5212] +++ killed by SIGBUS +++ [pid 5211] +++ killed by SIGBUS +++ [pid 5210] <... futex resumed>) = ? [pid 5210] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5210, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./57", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./57", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./57/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./57/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./57/binderfs") = 0 umount2("./57/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./57/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./57/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./57/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./57/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./57/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./57") = 0 mkdir("./58", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5213 attached , child_tidptr=0x555556218690) = 5213 [pid 5213] set_robust_list(0x5555562186a0, 24) = 0 [pid 5213] chdir("./58") = 0 [pid 5213] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5213] setpgid(0, 0) = 0 [pid 5213] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5213] write(3, "1000", 4) = 4 [pid 5213] close(3) = 0 [pid 5213] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5213] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5213] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5213] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5213] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5213] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5213] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5213] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5214 attached [pid 5214] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5213] <... clone3 resumed> => {parent_tid=[5214]}, 88) = 5214 [pid 5214] <... rseq resumed>) = 0 [pid 5213] rt_sigprocmask(SIG_SETMASK, [], [pid 5214] set_robust_list(0x7f3dc90769a0, 24 [pid 5213] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5214] <... set_robust_list resumed>) = 0 [pid 5213] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5214] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5213] <... futex resumed>) = 0 [pid 5214] memfd_create("syzkaller", 0 [pid 5213] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5214] <... memfd_create resumed>) = 3 [pid 5214] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5214] 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 5214] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5214] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5214] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5214] close(3) = 0 [pid 5214] mkdir("./file0", 0777) = 0 [pid 5214] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5214] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5214] chdir("./file0") = 0 [pid 5214] ioctl(4, LOOP_CLR_FD) = 0 [pid 5214] close(4) = 0 [pid 5214] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5214] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5213] <... futex resumed>) = 0 [pid 5213] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5213] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5214] <... futex resumed>) = 0 [pid 5214] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5214] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5214] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5213] <... futex resumed>) = 0 [pid 5213] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5214] <... futex resumed>) = 0 [pid 5213] <... futex resumed>) = 1 [pid 5214] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5213] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5214] <... open resumed>) = 5 [pid 5214] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5213] <... futex resumed>) = 0 [pid 5213] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5213] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5213] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5214] <... futex resumed>) = 1 [pid 5214] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5213] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5214] <... mmap resumed>) = 0x20000000 [pid 5213] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5213] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5213] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5215 attached [pid 5214] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5214] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5213] <... clone3 resumed> => {parent_tid=[5215]}, 88) = 5215 [pid 5213] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5213] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5213] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5215] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5215] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5215] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5215] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5213] <... futex resumed>) = ? [pid 5214] <... futex resumed>) = ? [pid 5215] +++ killed by SIGBUS +++ [pid 5214] +++ killed by SIGBUS +++ [pid 5213] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5213, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./58", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./58", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./58/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./58/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./58/binderfs") = 0 umount2("./58/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./58/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./58/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./58/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./58/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./58/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 [ 78.804007][ T5214] loop0: detected capacity change from 0 to 2048 [ 78.816774][ T5214] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) close(3) = 0 rmdir("./58") = 0 mkdir("./59", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5216 attached , child_tidptr=0x555556218690) = 5216 [pid 5216] set_robust_list(0x5555562186a0, 24) = 0 [pid 5216] chdir("./59") = 0 [pid 5216] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5216] setpgid(0, 0) = 0 [pid 5216] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5216] write(3, "1000", 4) = 4 [pid 5216] close(3) = 0 [pid 5216] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5216] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5216] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5216] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5216] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5216] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5216] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5216] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5217]}, 88) = 5217 [pid 5216] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5216] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5217 attached [pid 5217] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5217] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5216] <... futex resumed>) = 0 [pid 5217] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5216] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5217] memfd_create("syzkaller", 0) = 3 [pid 5217] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5217] 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 5217] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5217] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5217] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5217] close(3) = 0 [pid 5217] mkdir("./file0", 0777) = 0 [pid 5217] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5217] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5217] chdir("./file0") = 0 [pid 5217] ioctl(4, LOOP_CLR_FD) = 0 [pid 5217] close(4) = 0 [pid 5217] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5216] <... futex resumed>) = 0 [pid 5217] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5216] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5216] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5217] <... open resumed>) = 4 [pid 5217] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5216] <... futex resumed>) = 0 [pid 5217] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5216] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5217] <... futex resumed>) = 0 [pid 5216] <... futex resumed>) = 1 [pid 5216] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5217] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5217] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5216] <... futex resumed>) = 0 [pid 5217] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5216] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5217] <... mmap resumed>) = 0x20000000 [pid 5216] <... futex resumed>) = 0 [pid 5216] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5217] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5217] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5216] <... futex resumed>) = 0 [pid 5216] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5216] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5216] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5216] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5218 attached => {parent_tid=[5218]}, 88) = 5218 [pid 5216] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5216] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5216] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5218] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5218] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5218] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5218] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5217] <... futex resumed>) = ? [pid 5216] <... futex resumed>) = ? [pid 5217] +++ killed by SIGBUS +++ [pid 5218] +++ killed by SIGBUS +++ [pid 5216] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5216, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./59", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./59", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 [ 78.927593][ T5217] loop0: detected capacity change from 0 to 2048 [ 78.939249][ T5217] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./59/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./59/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./59/binderfs") = 0 umount2("./59/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./59/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./59/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./59/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./59/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./59/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./59") = 0 mkdir("./60", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5219 attached [pid 5219] set_robust_list(0x5555562186a0, 24) = 0 [pid 5219] chdir("./60") = 0 [pid 5219] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5219] setpgid(0, 0) = 0 [pid 5219] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5219] write(3, "1000", 4) = 4 [pid 5219] close(3) = 0 [pid 5219] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5219] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5219] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5219] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5219] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5219 [pid 5219] <... mmap resumed>) = 0x7f3dc9056000 [pid 5219] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5219] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5219] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5220 attached => {parent_tid=[5220]}, 88) = 5220 [pid 5220] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5219] rt_sigprocmask(SIG_SETMASK, [], [pid 5220] set_robust_list(0x7f3dc90769a0, 24 [pid 5219] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5220] <... set_robust_list resumed>) = 0 [pid 5219] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5220] rt_sigprocmask(SIG_SETMASK, [], [pid 5219] <... futex resumed>) = 0 [pid 5220] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5219] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5220] memfd_create("syzkaller", 0) = 3 [pid 5220] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5220] 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 5220] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5220] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5220] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5220] close(3) = 0 [pid 5220] mkdir("./file0", 0777) = 0 [pid 5220] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5220] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5220] chdir("./file0") = 0 [pid 5220] ioctl(4, LOOP_CLR_FD) = 0 [pid 5220] close(4) = 0 [pid 5220] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5219] <... futex resumed>) = 0 [pid 5219] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5220] <... futex resumed>) = 1 [pid 5219] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5220] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5220] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5220] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5219] <... futex resumed>) = 0 [pid 5219] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5219] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5220] <... futex resumed>) = 0 [pid 5220] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5220] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5219] <... futex resumed>) = 0 [pid 5219] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5220] <... futex resumed>) = 1 [pid 5219] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5220] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5219] <... futex resumed>) = 0 [pid 5220] <... mmap resumed>) = 0x20000000 [pid 5219] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5219] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5220] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5220] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5219] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5219] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5221]}, 88) = 5221 [pid 5219] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5219] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5219] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5221 attached [pid 5221] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5221] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5221] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5221] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5220] <... futex resumed>) = ? [pid 5221] +++ killed by SIGBUS +++ [pid 5220] +++ killed by SIGBUS +++ [pid 5219] <... futex resumed>) = ? [pid 5219] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5219, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./60", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./60", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./60/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./60/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./60/binderfs") = 0 umount2("./60/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./60/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./60/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./60/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./60/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./60/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./60") = 0 mkdir("./61", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5222 ./strace-static-x86_64: Process 5222 attached [ 79.052764][ T5220] loop0: detected capacity change from 0 to 2048 [ 79.064982][ T5220] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5222] set_robust_list(0x5555562186a0, 24) = 0 [pid 5222] chdir("./61") = 0 [pid 5222] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5222] setpgid(0, 0) = 0 [pid 5222] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5222] write(3, "1000", 4) = 4 [pid 5222] close(3) = 0 [pid 5222] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5222] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5222] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5222] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5222] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5222] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5222] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5222] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5223]}, 88) = 5223 [pid 5222] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5222] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5222] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5223 attached [pid 5223] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5223] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5223] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5223] memfd_create("syzkaller", 0) = 3 [pid 5223] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5223] 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 5223] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5223] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5223] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5223] close(3) = 0 [pid 5223] mkdir("./file0", 0777) = 0 [pid 5223] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5223] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5223] chdir("./file0") = 0 [pid 5223] ioctl(4, LOOP_CLR_FD) = 0 [pid 5223] close(4) = 0 [pid 5223] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5223] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5222] <... futex resumed>) = 0 [pid 5222] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5223] <... futex resumed>) = 0 [pid 5222] <... futex resumed>) = 1 [pid 5223] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5222] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5223] <... open resumed>) = 4 [pid 5223] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5223] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5222] <... futex resumed>) = 0 [pid 5222] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5223] <... futex resumed>) = 0 [pid 5222] <... futex resumed>) = 1 [pid 5223] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5222] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5223] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5222] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5223] <... futex resumed>) = 0 [pid 5223] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5222] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5223] <... mmap resumed>) = 0x20000000 [pid 5223] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5222] <... futex resumed>) = 0 [pid 5223] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5222] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5223] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5222] <... futex resumed>) = 0 [pid 5223] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5222] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5223] +++ killed by SIGBUS +++ [pid 5222] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5222, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./61", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./61", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./61/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./61/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./61/binderfs") = 0 umount2("./61/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./61/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./61/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./61/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./61/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./61/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 [ 79.157845][ T5223] loop0: detected capacity change from 0 to 2048 [ 79.170577][ T5223] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./61") = 0 mkdir("./62", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5224 attached , child_tidptr=0x555556218690) = 5224 [pid 5224] set_robust_list(0x5555562186a0, 24) = 0 [pid 5224] chdir("./62") = 0 [pid 5224] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5224] setpgid(0, 0) = 0 [pid 5224] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5224] write(3, "1000", 4) = 4 [pid 5224] close(3) = 0 [pid 5224] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5224] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5224] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5224] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5224] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5224] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5224] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5224] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5225 attached => {parent_tid=[5225]}, 88) = 5225 [pid 5224] rt_sigprocmask(SIG_SETMASK, [], [pid 5225] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5224] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5225] <... rseq resumed>) = 0 [pid 5225] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5225] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5225] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5224] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5225] <... futex resumed>) = 0 [pid 5224] <... futex resumed>) = 1 [pid 5225] memfd_create("syzkaller", 0 [pid 5224] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5225] <... memfd_create resumed>) = 3 [pid 5225] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5225] 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 5225] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5225] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5225] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5225] close(3) = 0 [pid 5225] mkdir("./file0", 0777) = 0 [pid 5225] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5225] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5225] chdir("./file0") = 0 [pid 5225] ioctl(4, LOOP_CLR_FD) = 0 [pid 5225] close(4) = 0 [pid 5225] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5225] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5224] <... futex resumed>) = 0 [pid 5224] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5224] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5225] <... futex resumed>) = 0 [pid 5225] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5225] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5225] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5224] <... futex resumed>) = 0 [pid 5224] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5224] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5225] <... futex resumed>) = 0 [pid 5225] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5225] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5224] <... futex resumed>) = 0 [pid 5224] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5225] <... futex resumed>) = 1 [pid 5224] <... futex resumed>) = 0 [pid 5225] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5224] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5225] <... mmap resumed>) = 0x20000000 [pid 5224] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5224] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5225] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5225] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5224] <... mprotect resumed>) = 0 [pid 5224] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5224] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5226 attached => {parent_tid=[5226]}, 88) = 5226 [pid 5224] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5224] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5224] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5226] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5226] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5226] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5226] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5224] <... futex resumed>) = ? [pid 5226] +++ killed by SIGBUS +++ [pid 5225] <... futex resumed>) = ? [pid 5225] +++ killed by SIGBUS +++ [pid 5224] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5224, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./62", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./62", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./62/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./62/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./62/binderfs") = 0 [ 79.279055][ T5225] loop0: detected capacity change from 0 to 2048 [ 79.290643][ T5225] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./62/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./62/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./62/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./62/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./62/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./62/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./62") = 0 mkdir("./63", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5227 ./strace-static-x86_64: Process 5227 attached [pid 5227] set_robust_list(0x5555562186a0, 24) = 0 [pid 5227] chdir("./63") = 0 [pid 5227] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5227] setpgid(0, 0) = 0 [pid 5227] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5227] write(3, "1000", 4) = 4 [pid 5227] close(3) = 0 [pid 5227] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5227] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5227] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5227] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5227] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5227] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5227] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5227] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5228 attached => {parent_tid=[5228]}, 88) = 5228 [pid 5228] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5227] rt_sigprocmask(SIG_SETMASK, [], [pid 5228] <... rseq resumed>) = 0 [pid 5227] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5228] set_robust_list(0x7f3dc90769a0, 24 [pid 5227] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5228] <... set_robust_list resumed>) = 0 [pid 5228] rt_sigprocmask(SIG_SETMASK, [], [pid 5227] <... futex resumed>) = 0 [pid 5228] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5227] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5228] memfd_create("syzkaller", 0) = 3 [pid 5228] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5228] 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 5228] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5228] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5228] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5228] close(3) = 0 [pid 5228] mkdir("./file0", 0777) = 0 [pid 5228] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5228] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5228] chdir("./file0") = 0 [pid 5228] ioctl(4, LOOP_CLR_FD) = 0 [pid 5228] close(4) = 0 [pid 5228] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5228] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5227] <... futex resumed>) = 0 [pid 5227] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5228] <... futex resumed>) = 0 [pid 5227] <... futex resumed>) = 1 [pid 5228] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5228] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5227] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5228] <... futex resumed>) = 0 [pid 5228] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5227] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5227] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5228] <... futex resumed>) = 0 [pid 5227] <... futex resumed>) = 1 [pid 5228] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5227] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5228] <... open resumed>) = 5 [pid 5228] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5227] <... futex resumed>) = 0 [pid 5228] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5227] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5228] <... mmap resumed>) = 0x20000000 [pid 5227] <... futex resumed>) = 0 [pid 5227] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5227] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5227] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5228] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5227] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5228] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5227] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5227] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5229 attached => {parent_tid=[5229]}, 88) = 5229 [pid 5229] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5227] rt_sigprocmask(SIG_SETMASK, [], [pid 5229] set_robust_list(0x7f3dc0d559a0, 24 [pid 5227] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5227] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5227] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5229] <... set_robust_list resumed>) = 0 [pid 5229] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5229] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5228] <... futex resumed>) = ? [pid 5228] +++ killed by SIGBUS +++ [pid 5227] <... futex resumed>) = ? [pid 5229] +++ killed by SIGBUS +++ [pid 5227] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5227, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./63", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./63", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./63/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./63/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./63/binderfs") = 0 umount2("./63/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./63/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./63/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./63/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./63/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./63/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./63") = 0 mkdir("./64", 0777) = 0 [ 79.397171][ T5228] loop0: detected capacity change from 0 to 2048 [ 79.408698][ T5228] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5230 ./strace-static-x86_64: Process 5230 attached [pid 5230] set_robust_list(0x5555562186a0, 24) = 0 [pid 5230] chdir("./64") = 0 [pid 5230] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5230] setpgid(0, 0) = 0 [pid 5230] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5230] write(3, "1000", 4) = 4 [pid 5230] close(3) = 0 [pid 5230] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5230] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5230] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5230] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5230] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5230] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5230] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5230] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5231]}, 88) = 5231 [pid 5230] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5230] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5230] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5231 attached [pid 5231] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5231] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5231] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5231] memfd_create("syzkaller", 0) = 3 [pid 5231] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5231] 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 5231] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5231] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5231] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5231] close(3) = 0 [pid 5231] mkdir("./file0", 0777) = 0 [pid 5231] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5231] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5231] chdir("./file0") = 0 [pid 5231] ioctl(4, LOOP_CLR_FD) = 0 [pid 5231] close(4) = 0 [pid 5231] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5230] <... futex resumed>) = 0 [pid 5230] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5231] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5230] <... futex resumed>) = 0 [pid 5230] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5231] <... open resumed>) = 4 [pid 5231] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5231] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5230] <... futex resumed>) = 0 [pid 5230] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5231] <... futex resumed>) = 0 [pid 5231] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5230] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5231] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5230] <... futex resumed>) = 0 [pid 5230] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5230] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5230] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5231] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5231] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5230] <... mprotect resumed>) = 0 [pid 5231] <... futex resumed>) = 0 [pid 5231] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5230] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5230] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5232]}, 88) = 5232 ./strace-static-x86_64: Process 5232 attached [pid 5230] rt_sigprocmask(SIG_SETMASK, [], [pid 5232] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5230] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5232] <... rseq resumed>) = 0 [pid 5230] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5232] set_robust_list(0x7f3dc0d559a0, 24 [pid 5230] <... futex resumed>) = 0 [pid 5232] <... set_robust_list resumed>) = 0 [pid 5230] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5232] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5232] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5230] <... futex resumed>) = ? [pid 5231] <... futex resumed>) = ? [pid 5232] +++ killed by SIGBUS +++ [pid 5231] +++ killed by SIGBUS +++ [pid 5230] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5230, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./64", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./64", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./64/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./64/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./64/binderfs") = 0 umount2("./64/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./64/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./64/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./64/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./64/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./64/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 [ 79.502187][ T5231] loop0: detected capacity change from 0 to 2048 [ 79.518751][ T5231] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./64") = 0 mkdir("./65", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5233 attached , child_tidptr=0x555556218690) = 5233 [pid 5233] set_robust_list(0x5555562186a0, 24) = 0 [pid 5233] chdir("./65") = 0 [pid 5233] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5233] setpgid(0, 0) = 0 [pid 5233] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5233] write(3, "1000", 4) = 4 [pid 5233] close(3) = 0 [pid 5233] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5233] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5233] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5233] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5233] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5233] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5233] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5233] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5234 attached => {parent_tid=[5234]}, 88) = 5234 [pid 5234] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5233] rt_sigprocmask(SIG_SETMASK, [], [pid 5234] <... rseq resumed>) = 0 [pid 5233] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5234] set_robust_list(0x7f3dc90769a0, 24 [pid 5233] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5234] <... set_robust_list resumed>) = 0 [pid 5233] <... futex resumed>) = 0 [pid 5234] rt_sigprocmask(SIG_SETMASK, [], [pid 5233] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5234] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5234] memfd_create("syzkaller", 0) = 3 [pid 5234] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5234] 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 5234] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5234] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5234] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5234] close(3) = 0 [pid 5234] mkdir("./file0", 0777) = 0 [pid 5234] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5234] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5234] chdir("./file0") = 0 [pid 5234] ioctl(4, LOOP_CLR_FD) = 0 [pid 5234] close(4) = 0 [pid 5234] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5234] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5233] <... futex resumed>) = 0 [pid 5233] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5234] <... futex resumed>) = 0 [pid 5233] <... futex resumed>) = 1 [pid 5234] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5233] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5234] <... open resumed>) = 4 [pid 5234] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5233] <... futex resumed>) = 0 [pid 5234] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5233] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5234] <... open resumed>) = 5 [pid 5233] <... futex resumed>) = 0 [pid 5234] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5233] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5234] <... futex resumed>) = 0 [pid 5233] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5234] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5233] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5234] <... mmap resumed>) = 0x20000000 [pid 5233] <... futex resumed>) = 0 [pid 5233] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5233] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5233] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5234] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5233] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5234] <... futex resumed>) = 0 [pid 5233] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5234] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5233] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5235 attached => {parent_tid=[5235]}, 88) = 5235 [pid 5233] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5233] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5233] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5235] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5235] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5235] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5235] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5234] <... futex resumed>) = ? [pid 5233] <... futex resumed>) = ? [pid 5234] +++ killed by SIGBUS +++ [pid 5235] +++ killed by SIGBUS +++ [pid 5233] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5233, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./65", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./65", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./65/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./65/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./65/binderfs") = 0 umount2("./65/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./65/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./65/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./65/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./65/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./65/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./65") = 0 mkdir("./66", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5236 ./strace-static-x86_64: Process 5236 attached [pid 5236] set_robust_list(0x5555562186a0, 24) = 0 [ 79.612087][ T5234] loop0: detected capacity change from 0 to 2048 [ 79.624607][ T5234] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5236] chdir("./66") = 0 [pid 5236] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5236] setpgid(0, 0) = 0 [pid 5236] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5236] write(3, "1000", 4) = 4 [pid 5236] close(3) = 0 [pid 5236] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5236] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5236] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5236] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5236] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5236] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5236] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5236] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5237]}, 88) = 5237 [pid 5236] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5236] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5237 attached [pid 5237] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5236] <... futex resumed>) = 0 [pid 5236] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5237] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5237] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5237] memfd_create("syzkaller", 0) = 3 [pid 5237] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5237] 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 5237] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5237] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5237] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5237] close(3) = 0 [pid 5237] mkdir("./file0", 0777) = 0 [pid 5237] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5237] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5237] chdir("./file0") = 0 [pid 5237] ioctl(4, LOOP_CLR_FD) = 0 [pid 5237] close(4) = 0 [pid 5237] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5236] <... futex resumed>) = 0 [pid 5237] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5236] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5236] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5237] <... open resumed>) = 4 [pid 5237] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5236] <... futex resumed>) = 0 [pid 5237] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5236] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5237] <... futex resumed>) = 0 [pid 5236] <... futex resumed>) = 1 [pid 5237] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5236] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5237] <... open resumed>) = 5 [pid 5237] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5236] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5237] <... futex resumed>) = 0 [pid 5236] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5237] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1<) = 0 [pid 5237] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5236] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5237] <... futex resumed>) = 0 [pid 5236] <... futex resumed>) = 0 [pid 5237] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5237] +++ killed by SIGBUS +++ [pid 5236] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5236, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./66", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./66", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./66/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./66/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./66/binderfs") = 0 umount2("./66/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./66/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./66/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./66/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./66/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./66/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 [ 79.707702][ T5237] loop0: detected capacity change from 0 to 2048 [ 79.729544][ T5237] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./66") = 0 mkdir("./67", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5238 attached , child_tidptr=0x555556218690) = 5238 [pid 5238] set_robust_list(0x5555562186a0, 24) = 0 [pid 5238] chdir("./67") = 0 [pid 5238] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5238] setpgid(0, 0) = 0 [pid 5238] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5238] write(3, "1000", 4) = 4 [pid 5238] close(3) = 0 [pid 5238] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5238] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5238] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5238] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5238] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5238] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5238] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5238] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5239 attached => {parent_tid=[5239]}, 88) = 5239 [pid 5239] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5238] rt_sigprocmask(SIG_SETMASK, [], [pid 5239] <... rseq resumed>) = 0 [pid 5238] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5239] set_robust_list(0x7f3dc90769a0, 24 [pid 5238] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5239] <... set_robust_list resumed>) = 0 [pid 5239] rt_sigprocmask(SIG_SETMASK, [], [pid 5238] <... futex resumed>) = 0 [pid 5239] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5238] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5239] memfd_create("syzkaller", 0) = 3 [pid 5239] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5239] 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 5239] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5239] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5239] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5239] close(3) = 0 [pid 5239] mkdir("./file0", 0777) = 0 [pid 5239] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5239] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5239] chdir("./file0") = 0 [pid 5239] ioctl(4, LOOP_CLR_FD) = 0 [pid 5239] close(4) = 0 [pid 5239] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5239] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5238] <... futex resumed>) = 0 [pid 5238] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5239] <... futex resumed>) = 0 [pid 5238] <... futex resumed>) = 1 [pid 5239] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5238] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5239] <... open resumed>) = 4 [pid 5239] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5238] <... futex resumed>) = 0 [pid 5239] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5238] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5239] <... futex resumed>) = 0 [pid 5238] <... futex resumed>) = 1 [pid 5239] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5238] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5239] <... open resumed>) = 5 [pid 5239] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5238] <... futex resumed>) = 0 [pid 5239] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5238] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5239] <... futex resumed>) = 0 [pid 5238] <... futex resumed>) = 1 [pid 5239] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5238] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5238] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5239] <... mmap resumed>) = 0x20000000 [pid 5238] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5239] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5239] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5238] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5238] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5238] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5240 attached => {parent_tid=[5240]}, 88) = 5240 [pid 5240] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5238] rt_sigprocmask(SIG_SETMASK, [], [pid 5240] <... rseq resumed>) = 0 [pid 5238] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5240] set_robust_list(0x7f3dc0d559a0, 24 [pid 5238] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5240] <... set_robust_list resumed>) = 0 [pid 5238] <... futex resumed>) = 0 [pid 5240] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5238] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5240] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5239] <... futex resumed>) = ? [pid 5238] <... futex resumed>) = ? [pid 5239] +++ killed by SIGBUS +++ [pid 5240] +++ killed by SIGBUS +++ [pid 5238] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5238, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./67", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./67", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./67/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./67/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./67/binderfs") = 0 [ 79.817730][ T5239] loop0: detected capacity change from 0 to 2048 [ 79.828580][ T5239] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./67/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./67/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./67/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./67/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./67/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./67/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./67") = 0 mkdir("./68", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5241 attached [pid 5241] set_robust_list(0x5555562186a0, 24) = 0 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5241 [pid 5241] chdir("./68") = 0 [pid 5241] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5241] setpgid(0, 0) = 0 [pid 5241] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5241] write(3, "1000", 4) = 4 [pid 5241] close(3) = 0 [pid 5241] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5241] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5241] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5241] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5241] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5241] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5241] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5241] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5242 attached => {parent_tid=[5242]}, 88) = 5242 [pid 5241] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5241] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5241] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5242] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5242] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5242] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5242] memfd_create("syzkaller", 0) = 3 [pid 5242] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5242] 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 5242] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5242] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5242] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5242] close(3) = 0 [pid 5242] mkdir("./file0", 0777) = 0 [pid 5242] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5242] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5242] chdir("./file0") = 0 [pid 5242] ioctl(4, LOOP_CLR_FD) = 0 [pid 5242] close(4) = 0 [pid 5242] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5241] <... futex resumed>) = 0 [pid 5242] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5241] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5242] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5241] <... futex resumed>) = 0 [pid 5242] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5241] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5242] <... open resumed>) = 4 [pid 5242] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5241] <... futex resumed>) = 0 [pid 5242] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5241] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5242] <... open resumed>) = 5 [pid 5241] <... futex resumed>) = 0 [pid 5241] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5242] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5241] <... futex resumed>) = 0 [pid 5241] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5241] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5241] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5241] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5242] <... futex resumed>) = 1 [pid 5241] <... mprotect resumed>) = 0 [pid 5242] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< {parent_tid=[5243]}, 88) = 5243 [pid 5241] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5241] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5242] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5241] <... futex resumed>) = 0 [pid 5242] <... futex resumed>) = 0 [pid 5242] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5241] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5243 attached [pid 5243] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5243] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5243] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5243] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5243] +++ killed by SIGBUS +++ [pid 5242] <... futex resumed>) = ? [pid 5241] <... futex resumed>) = ? [pid 5242] +++ killed by SIGBUS +++ [pid 5241] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5241, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./68", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./68", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./68/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./68/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./68/binderfs") = 0 umount2("./68/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./68/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./68/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./68/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./68/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./68/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./68") = 0 mkdir("./69", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 79.922801][ T5242] loop0: detected capacity change from 0 to 2048 [ 79.935301][ T5242] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5244 attached , child_tidptr=0x555556218690) = 5244 [pid 5244] set_robust_list(0x5555562186a0, 24) = 0 [pid 5244] chdir("./69") = 0 [pid 5244] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5244] setpgid(0, 0) = 0 [pid 5244] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5244] write(3, "1000", 4) = 4 [pid 5244] close(3) = 0 [pid 5244] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5244] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5244] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5244] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5244] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5244] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5244] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5244] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5245 attached => {parent_tid=[5245]}, 88) = 5245 [pid 5244] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5244] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5244] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5245] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5245] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5245] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5245] memfd_create("syzkaller", 0) = 3 [pid 5245] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5245] 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 5245] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5245] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5245] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5245] close(3) = 0 [pid 5245] mkdir("./file0", 0777) = 0 [pid 5245] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5245] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5245] chdir("./file0") = 0 [pid 5245] ioctl(4, LOOP_CLR_FD) = 0 [pid 5245] close(4) = 0 [pid 5245] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5244] <... futex resumed>) = 0 [pid 5245] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5244] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5245] <... futex resumed>) = 0 [pid 5244] <... futex resumed>) = 1 [pid 5245] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5244] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5245] <... open resumed>) = 4 [pid 5245] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5244] <... futex resumed>) = 0 [pid 5245] <... futex resumed>) = 1 [pid 5244] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5245] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5244] <... futex resumed>) = 0 [pid 5244] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5245] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5244] <... futex resumed>) = 0 [pid 5244] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5245] <... futex resumed>) = 1 [pid 5244] <... futex resumed>) = 0 [pid 5245] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5244] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5245] <... mmap resumed>) = 0x20000000 [pid 5244] <... futex resumed>) = 0 [pid 5244] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5244] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5245] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5245] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5244] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5244] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5246 attached => {parent_tid=[5246]}, 88) = 5246 [pid 5246] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5244] rt_sigprocmask(SIG_SETMASK, [], [pid 5246] <... rseq resumed>) = 0 [pid 5244] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5246] set_robust_list(0x7f3dc0d559a0, 24 [pid 5244] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5246] <... set_robust_list resumed>) = 0 [pid 5246] rt_sigprocmask(SIG_SETMASK, [], [pid 5244] <... futex resumed>) = 0 [pid 5246] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5244] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5246] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5245] <... futex resumed>) = ? [pid 5245] +++ killed by SIGBUS +++ [pid 5244] <... futex resumed>) = ? [pid 5246] +++ killed by SIGBUS +++ [pid 5244] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5244, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./69", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./69", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./69/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./69/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./69/binderfs") = 0 umount2("./69/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./69/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./69/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./69/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./69/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./69/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./69") = 0 mkdir("./70", 0777) = 0 [ 80.037409][ T5245] loop0: detected capacity change from 0 to 2048 [ 80.049490][ T5245] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5247 attached , child_tidptr=0x555556218690) = 5247 [pid 5247] set_robust_list(0x5555562186a0, 24) = 0 [pid 5247] chdir("./70") = 0 [pid 5247] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5247] setpgid(0, 0) = 0 [pid 5247] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5247] write(3, "1000", 4) = 4 [pid 5247] close(3) = 0 [pid 5247] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5247] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5247] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5247] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5247] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5247] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5247] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5247] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5248 attached [pid 5248] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5247] <... clone3 resumed> => {parent_tid=[5248]}, 88) = 5248 [pid 5248] <... rseq resumed>) = 0 [pid 5247] rt_sigprocmask(SIG_SETMASK, [], [pid 5248] set_robust_list(0x7f3dc90769a0, 24 [pid 5247] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5248] <... set_robust_list resumed>) = 0 [pid 5247] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5248] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5247] <... futex resumed>) = 0 [pid 5247] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5248] memfd_create("syzkaller", 0) = 3 [pid 5248] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5248] 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 5248] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5248] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5248] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5248] close(3) = 0 [pid 5248] mkdir("./file0", 0777) = 0 [pid 5248] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5248] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5248] chdir("./file0") = 0 [pid 5248] ioctl(4, LOOP_CLR_FD) = 0 [pid 5248] close(4) = 0 [pid 5248] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5247] <... futex resumed>) = 0 [pid 5248] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5247] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5248] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5248] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5247] <... futex resumed>) = 0 [pid 5247] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5248] <... open resumed>) = 4 [pid 5248] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5247] <... futex resumed>) = 0 [pid 5248] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5247] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5248] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5247] <... futex resumed>) = 0 [pid 5248] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5247] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5248] <... open resumed>) = 5 [pid 5248] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5247] <... futex resumed>) = 0 [pid 5248] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5247] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5248] <... futex resumed>) = 0 [pid 5247] <... futex resumed>) = 1 [pid 5248] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5247] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5248] <... mmap resumed>) = 0x20000000 [pid 5248] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5247] <... futex resumed>) = 0 [pid 5248] <... futex resumed>) = 0 [pid 5247] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5248] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5247] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5247] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5247] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5247] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5249 attached => {parent_tid=[5249]}, 88) = 5249 [pid 5249] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5247] rt_sigprocmask(SIG_SETMASK, [], [pid 5249] set_robust_list(0x7f3dc0d559a0, 24 [pid 5247] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5249] <... set_robust_list resumed>) = 0 [pid 5247] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5249] rt_sigprocmask(SIG_SETMASK, [], [pid 5247] <... futex resumed>) = 0 [pid 5249] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5247] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5249] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5247] <... futex resumed>) = ? [pid 5248] <... futex resumed>) = ? [pid 5248] +++ killed by SIGBUS +++ [pid 5249] +++ killed by SIGBUS +++ [pid 5247] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5247, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./70", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./70", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./70/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./70/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./70/binderfs") = 0 umount2("./70/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./70/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./70/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./70/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./70/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./70/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./70") = 0 mkdir("./71", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5250 attached , child_tidptr=0x555556218690) = 5250 [pid 5250] set_robust_list(0x5555562186a0, 24) = 0 [pid 5250] chdir("./71") = 0 [pid 5250] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5250] setpgid(0, 0) = 0 [pid 5250] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5250] write(3, "1000", 4) = 4 [pid 5250] close(3) = 0 [pid 5250] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5250] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [ 80.127617][ T5248] loop0: detected capacity change from 0 to 2048 [ 80.141660][ T5248] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5250] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5250] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5250] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5250] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5250] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5250] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5251 attached [pid 5251] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5250] <... clone3 resumed> => {parent_tid=[5251]}, 88) = 5251 [pid 5251] <... rseq resumed>) = 0 [pid 5250] rt_sigprocmask(SIG_SETMASK, [], [pid 5251] set_robust_list(0x7f3dc90769a0, 24 [pid 5250] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5251] <... set_robust_list resumed>) = 0 [pid 5250] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5251] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5250] <... futex resumed>) = 0 [pid 5251] memfd_create("syzkaller", 0 [pid 5250] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5251] <... memfd_create resumed>) = 3 [pid 5251] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5251] 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 5251] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5251] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5251] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5251] close(3) = 0 [pid 5251] mkdir("./file0", 0777) = 0 [pid 5251] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5251] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5251] chdir("./file0") = 0 [pid 5251] ioctl(4, LOOP_CLR_FD) = 0 [pid 5251] close(4) = 0 [pid 5251] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5250] <... futex resumed>) = 0 [pid 5251] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5250] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5251] <... open resumed>) = 4 [pid 5251] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5251] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0 [pid 5251] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5250] <... futex resumed>) = 1 [pid 5250] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5250] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5251] <... futex resumed>) = 0 [pid 5251] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5250] <... futex resumed>) = 1 [pid 5251] <... open resumed>) = 5 [pid 5250] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5251] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5250] <... futex resumed>) = 0 [pid 5250] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5250] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5250] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5251] <... futex resumed>) = 1 [pid 5251] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1<) = 0x7f3dc0d35000 [pid 5250] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5251] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5251] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5250] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5250] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5252 attached => {parent_tid=[5252]}, 88) = 5252 [pid 5250] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5250] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5252] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5250] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5252] <... rseq resumed>) = 0 [pid 5252] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5252] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5252] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5251] <... futex resumed>) = ? [pid 5250] <... futex resumed>) = ? [pid 5252] +++ killed by SIGBUS +++ [pid 5251] +++ killed by SIGBUS +++ [pid 5250] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5250, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./71", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./71", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./71/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./71/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./71/binderfs") = 0 [ 80.216640][ T5251] loop0: detected capacity change from 0 to 2048 [ 80.230828][ T5251] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./71/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./71/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./71/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./71/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./71/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./71/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./71") = 0 mkdir("./72", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5253 attached , child_tidptr=0x555556218690) = 5253 [pid 5253] set_robust_list(0x5555562186a0, 24) = 0 [pid 5253] chdir("./72") = 0 [pid 5253] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5253] setpgid(0, 0) = 0 [pid 5253] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5253] write(3, "1000", 4) = 4 [pid 5253] close(3) = 0 [pid 5253] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5253] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5253] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5253] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5253] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5253] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5253] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5253] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5254 attached [pid 5254] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5253] <... clone3 resumed> => {parent_tid=[5254]}, 88) = 5254 [pid 5254] <... rseq resumed>) = 0 [pid 5254] set_robust_list(0x7f3dc90769a0, 24 [pid 5253] rt_sigprocmask(SIG_SETMASK, [], [pid 5254] <... set_robust_list resumed>) = 0 [pid 5253] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5253] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5254] rt_sigprocmask(SIG_SETMASK, [], [pid 5253] <... futex resumed>) = 0 [pid 5254] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5254] memfd_create("syzkaller", 0 [pid 5253] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5254] <... memfd_create resumed>) = 3 [pid 5254] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5254] 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 5254] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5254] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5254] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5254] close(3) = 0 [pid 5254] mkdir("./file0", 0777) = 0 [pid 5254] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5254] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5254] chdir("./file0") = 0 [pid 5254] ioctl(4, LOOP_CLR_FD) = 0 [pid 5254] close(4) = 0 [pid 5254] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5253] <... futex resumed>) = 0 [pid 5253] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5254] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5253] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5254] <... open resumed>) = 4 [pid 5254] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5254] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5253] <... futex resumed>) = 0 [pid 5253] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5254] <... futex resumed>) = 0 [pid 5253] <... futex resumed>) = 1 [pid 5254] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5253] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5254] <... open resumed>) = 5 [pid 5254] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5253] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5254] <... futex resumed>) = 0 [pid 5254] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5253] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5254] <... futex resumed>) = 0 [pid 5253] <... futex resumed>) = 1 [pid 5254] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5253] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5253] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5253] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5255 attached [pid 5255] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5253] <... clone3 resumed> => {parent_tid=[5255]}, 88) = 5255 [pid 5253] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5253] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5253] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5255] <... rseq resumed>) = 0 [pid 5255] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5255] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5255] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5253] <... futex resumed>) = ? [pid 5254] <... futex resumed>) = ? [pid 5255] +++ killed by SIGBUS +++ [pid 5254] +++ killed by SIGBUS +++ [pid 5253] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5253, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./72", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./72", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./72/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./72/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./72/binderfs") = 0 umount2("./72/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./72/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./72/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./72/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 80.333576][ T5254] loop0: detected capacity change from 0 to 2048 [ 80.344026][ T5254] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./72/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./72/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./72") = 0 mkdir("./73", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5256 attached , child_tidptr=0x555556218690) = 5256 [pid 5256] set_robust_list(0x5555562186a0, 24) = 0 [pid 5256] chdir("./73") = 0 [pid 5256] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5256] setpgid(0, 0) = 0 [pid 5256] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5256] write(3, "1000", 4) = 4 [pid 5256] close(3) = 0 [pid 5256] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5256] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5256] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5256] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5256] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5256] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5256] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5256] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5257 attached [pid 5257] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5256] <... clone3 resumed> => {parent_tid=[5257]}, 88) = 5257 [pid 5257] set_robust_list(0x7f3dc90769a0, 24 [pid 5256] rt_sigprocmask(SIG_SETMASK, [], [pid 5257] <... set_robust_list resumed>) = 0 [pid 5257] rt_sigprocmask(SIG_SETMASK, [], [pid 5256] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5257] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5257] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5256] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5257] <... futex resumed>) = 0 [pid 5257] memfd_create("syzkaller", 0) = 3 [pid 5257] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5256] <... futex resumed>) = 1 [pid 5256] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5257] 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 5257] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5257] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5257] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5257] close(3) = 0 [pid 5257] mkdir("./file0", 0777) = 0 [pid 5257] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5257] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5257] chdir("./file0") = 0 [pid 5257] ioctl(4, LOOP_CLR_FD) = 0 [pid 5257] close(4) = 0 [pid 5257] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5256] <... futex resumed>) = 0 [pid 5257] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5256] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5256] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5257] <... open resumed>) = 4 [pid 5257] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5256] <... futex resumed>) = 0 [pid 5257] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5256] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5257] <... futex resumed>) = 0 [pid 5256] <... futex resumed>) = 1 [pid 5257] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5256] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5257] <... open resumed>) = 5 [pid 5257] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5257] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5256] <... futex resumed>) = 0 [pid 5256] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5257] <... futex resumed>) = 0 [pid 5256] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5257] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5256] <... futex resumed>) = 0 [pid 5257] <... mmap resumed>) = 0x20000000 [pid 5256] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5257] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5257] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5256] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5256] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5256] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5258 attached => {parent_tid=[5258]}, 88) = 5258 [pid 5256] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5256] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5256] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5258] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5258] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5258] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5258] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5257] <... futex resumed>) = ? [pid 5257] +++ killed by SIGBUS +++ [pid 5256] <... futex resumed>) = ? [pid 5258] +++ killed by SIGBUS +++ [pid 5256] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5256, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./73", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./73", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./73/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./73/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./73/binderfs") = 0 umount2("./73/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./73/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./73/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./73/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./73/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./73/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./73") = 0 mkdir("./74", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5259 attached , child_tidptr=0x555556218690) = 5259 [pid 5259] set_robust_list(0x5555562186a0, 24) = 0 [ 80.455358][ T5257] loop0: detected capacity change from 0 to 2048 [ 80.466819][ T5257] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5259] chdir("./74") = 0 [pid 5259] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5259] setpgid(0, 0) = 0 [pid 5259] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5259] write(3, "1000", 4) = 4 [pid 5259] close(3) = 0 [pid 5259] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5259] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5259] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5259] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5259] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5259] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5259] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5259] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5260 attached => {parent_tid=[5260]}, 88) = 5260 [pid 5260] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5259] rt_sigprocmask(SIG_SETMASK, [], [pid 5260] <... rseq resumed>) = 0 [pid 5260] set_robust_list(0x7f3dc90769a0, 24 [pid 5259] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5260] <... set_robust_list resumed>) = 0 [pid 5260] rt_sigprocmask(SIG_SETMASK, [], [pid 5259] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5259] <... futex resumed>) = 0 [pid 5260] memfd_create("syzkaller", 0 [pid 5259] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5260] <... memfd_create resumed>) = 3 [pid 5260] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5260] 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 5260] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5260] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5260] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5260] close(3) = 0 [pid 5260] mkdir("./file0", 0777) = 0 [pid 5260] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5260] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5260] chdir("./file0") = 0 [pid 5260] ioctl(4, LOOP_CLR_FD) = 0 [pid 5260] close(4) = 0 [pid 5260] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5259] <... futex resumed>) = 0 [pid 5260] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5259] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5259] <... futex resumed>) = 0 [pid 5260] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5259] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5260] <... open resumed>) = 4 [pid 5260] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5260] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5259] <... futex resumed>) = 0 [pid 5260] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5259] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5259] <... futex resumed>) = 0 [pid 5260] <... open resumed>) = 5 [pid 5259] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5260] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5259] <... futex resumed>) = 0 [pid 5259] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] <... futex resumed>) = 1 [pid 5259] <... futex resumed>) = 0 [pid 5260] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5259] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5260] <... mmap resumed>) = 0x20000000 [pid 5259] <... futex resumed>) = 0 [pid 5259] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5260] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5259] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5260] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5259] <... mprotect resumed>) = 0 [pid 5259] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5259] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5261 attached [pid 5261] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5259] <... clone3 resumed> => {parent_tid=[5261]}, 88) = 5261 [pid 5261] <... rseq resumed>) = 0 [pid 5259] rt_sigprocmask(SIG_SETMASK, [], [pid 5261] set_robust_list(0x7f3dc0d559a0, 24 [pid 5259] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5261] <... set_robust_list resumed>) = 0 [pid 5259] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5261] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5259] <... futex resumed>) = 0 [pid 5261] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5259] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5260] <... futex resumed>) = ? [pid 5261] +++ killed by SIGBUS +++ [pid 5260] +++ killed by SIGBUS +++ [pid 5259] <... futex resumed>) = ? [pid 5259] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5259, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./74", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./74", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./74/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./74/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./74/binderfs") = 0 [ 80.547115][ T5260] loop0: detected capacity change from 0 to 2048 [ 80.562692][ T5260] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./74/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./74/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./74/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./74/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./74/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./74/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./74") = 0 mkdir("./75", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5262 ./strace-static-x86_64: Process 5262 attached [pid 5262] set_robust_list(0x5555562186a0, 24) = 0 [pid 5262] chdir("./75") = 0 [pid 5262] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5262] setpgid(0, 0) = 0 [pid 5262] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5262] write(3, "1000", 4) = 4 [pid 5262] close(3) = 0 [pid 5262] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5262] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5262] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5262] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5262] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5262] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5262] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5262] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5263]}, 88) = 5263 [pid 5262] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5262] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5262] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5263 attached [pid 5263] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5263] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5263] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5263] memfd_create("syzkaller", 0) = 3 [pid 5263] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5263] 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 5263] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5263] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5263] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5263] close(3) = 0 [pid 5263] mkdir("./file0", 0777) = 0 [pid 5263] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5263] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5263] chdir("./file0") = 0 [pid 5263] ioctl(4, LOOP_CLR_FD) = 0 [pid 5263] close(4) = 0 [pid 5263] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5262] <... futex resumed>) = 0 [pid 5262] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5263] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5262] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5263] <... open resumed>) = 4 [pid 5263] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5262] <... futex resumed>) = 0 [pid 5263] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5262] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5262] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5263] <... open resumed>) = 5 [pid 5263] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5262] <... futex resumed>) = 0 [pid 5263] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5262] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5263] <... futex resumed>) = 0 [pid 5262] <... futex resumed>) = 1 [pid 5263] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5262] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5263] <... mmap resumed>) = 0x20000000 [pid 5262] <... futex resumed>) = 0 [pid 5262] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5263] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5262] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5262] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5263] <... futex resumed>) = 0 [pid 5263] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5262] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5262] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5264]}, 88) = 5264 [pid 5262] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5262] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5262] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5264 attached [pid 5264] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5264] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5264] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5264] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5263] <... futex resumed>) = ? [pid 5262] <... futex resumed>) = ? [pid 5264] +++ killed by SIGBUS +++ [pid 5263] +++ killed by SIGBUS +++ [pid 5262] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5262, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./75", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./75", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./75/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./75/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 80.653125][ T5263] loop0: detected capacity change from 0 to 2048 [ 80.664866][ T5263] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) unlink("./75/binderfs") = 0 umount2("./75/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./75/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./75/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./75/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./75/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./75/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./75") = 0 mkdir("./76", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5265 ./strace-static-x86_64: Process 5265 attached [pid 5265] set_robust_list(0x5555562186a0, 24) = 0 [pid 5265] chdir("./76") = 0 [pid 5265] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5265] setpgid(0, 0) = 0 [pid 5265] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5265] write(3, "1000", 4) = 4 [pid 5265] close(3) = 0 [pid 5265] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5265] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5265] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5265] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5265] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5265] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5265] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5265] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5266 attached => {parent_tid=[5266]}, 88) = 5266 [pid 5265] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5265] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5265] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5266] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5266] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5266] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5266] memfd_create("syzkaller", 0) = 3 [pid 5266] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5266] 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 5266] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5266] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5266] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5266] close(3) = 0 [pid 5266] mkdir("./file0", 0777) = 0 [pid 5266] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5266] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5266] chdir("./file0") = 0 [pid 5266] ioctl(4, LOOP_CLR_FD) = 0 [pid 5266] close(4) = 0 [pid 5266] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5266] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5265] <... futex resumed>) = 0 [pid 5265] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5266] <... futex resumed>) = 0 [pid 5266] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5265] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5266] <... open resumed>) = 4 [pid 5266] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5266] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5265] <... futex resumed>) = 0 [pid 5265] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5266] <... futex resumed>) = 0 [pid 5266] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5265] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5266] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5265] <... futex resumed>) = 0 [pid 5265] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5265] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5266] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5265] <... futex resumed>) = 0 [pid 5266] <... mmap resumed>) = 0x20000000 [pid 5265] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5265] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5266] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5266] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5265] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5265] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5267]}, 88) = 5267 [pid 5265] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5265] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5265] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5267 attached [pid 5267] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5267] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5267] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5267] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5265] <... futex resumed>) = ? [pid 5266] <... futex resumed>) = ? [pid 5267] +++ killed by SIGBUS +++ [pid 5266] +++ killed by SIGBUS +++ [pid 5265] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5265, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./76", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./76", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./76/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./76/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./76/binderfs") = 0 umount2("./76/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./76/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./76/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./76/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./76/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./76/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 [ 80.761679][ T5266] loop0: detected capacity change from 0 to 2048 [ 80.772808][ T5266] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./76") = 0 mkdir("./77", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5268 ./strace-static-x86_64: Process 5268 attached [pid 5268] set_robust_list(0x5555562186a0, 24) = 0 [pid 5268] chdir("./77") = 0 [pid 5268] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5268] setpgid(0, 0) = 0 [pid 5268] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5268] write(3, "1000", 4) = 4 [pid 5268] close(3) = 0 [pid 5268] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5268] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5268] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5268] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5268] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5268] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5268] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5268] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5269 attached => {parent_tid=[5269]}, 88) = 5269 [pid 5268] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5268] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5268] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5269] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5269] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5269] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5269] memfd_create("syzkaller", 0) = 3 [pid 5269] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5269] 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 5269] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5269] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5269] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5269] close(3) = 0 [pid 5269] mkdir("./file0", 0777) = 0 [pid 5269] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5269] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5269] chdir("./file0") = 0 [pid 5269] ioctl(4, LOOP_CLR_FD) = 0 [pid 5269] close(4) = 0 [pid 5269] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5269] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5268] <... futex resumed>) = 0 [pid 5268] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5269] <... futex resumed>) = 0 [pid 5269] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5268] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5269] <... open resumed>) = 4 [pid 5269] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5269] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5268] <... futex resumed>) = 0 [pid 5268] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5269] <... futex resumed>) = 0 [pid 5268] <... futex resumed>) = 1 [pid 5269] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5269] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5268] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5269] <... futex resumed>) = 0 [pid 5268] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5269] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5268] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5269] <... mmap resumed>) = 0x20000000 [pid 5268] <... futex resumed>) = 0 [pid 5268] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5268] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5269] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5268] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5269] <... futex resumed>) = 0 [pid 5268] <... mprotect resumed>) = 0 [pid 5269] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5268] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5268] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5270]}, 88) = 5270 [pid 5268] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5268] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5268] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5270 attached [pid 5270] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5270] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5270] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5270] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5269] <... futex resumed>) = ? [pid 5269] +++ killed by SIGBUS +++ [pid 5270] +++ killed by SIGBUS +++ [pid 5268] <... futex resumed>) = ? [pid 5268] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5268, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./77", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./77", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./77/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./77/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./77/binderfs") = 0 [ 80.867020][ T5269] loop0: detected capacity change from 0 to 2048 [ 80.878338][ T5269] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./77/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./77/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./77/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./77/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./77/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./77/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./77") = 0 mkdir("./78", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5271 attached , child_tidptr=0x555556218690) = 5271 [pid 5271] set_robust_list(0x5555562186a0, 24) = 0 [pid 5271] chdir("./78") = 0 [pid 5271] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5271] setpgid(0, 0) = 0 [pid 5271] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5271] write(3, "1000", 4) = 4 [pid 5271] close(3) = 0 [pid 5271] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5271] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5271] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5271] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5271] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5271] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5271] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5271] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5272]}, 88) = 5272 [pid 5271] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5271] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5271] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5272 attached [pid 5272] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5272] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5272] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5272] memfd_create("syzkaller", 0) = 3 [pid 5272] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5272] 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 5272] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5272] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5272] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5272] close(3) = 0 [pid 5272] mkdir("./file0", 0777) = 0 [pid 5272] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5272] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5272] chdir("./file0") = 0 [pid 5272] ioctl(4, LOOP_CLR_FD) = 0 [pid 5272] close(4) = 0 [pid 5272] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5271] <... futex resumed>) = 0 [pid 5272] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5271] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5271] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5272] <... open resumed>) = 4 [pid 5272] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5271] <... futex resumed>) = 0 [pid 5272] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5271] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5272] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5271] <... futex resumed>) = 0 [pid 5272] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5271] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5272] <... open resumed>) = 5 [pid 5272] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5271] <... futex resumed>) = 0 [pid 5272] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5271] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5272] <... mmap resumed>) = 0x20000000 [pid 5271] <... futex resumed>) = 0 [pid 5272] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5271] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5272] <... futex resumed>) = 0 [pid 5271] <... futex resumed>) = 0 [pid 5272] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5271] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5271] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5271] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5271] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5273 attached [pid 5273] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5271] <... clone3 resumed> => {parent_tid=[5273]}, 88) = 5273 [pid 5273] <... rseq resumed>) = 0 [pid 5271] rt_sigprocmask(SIG_SETMASK, [], [pid 5273] set_robust_list(0x7f3dc0d559a0, 24 [pid 5271] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5273] <... set_robust_list resumed>) = 0 [pid 5273] rt_sigprocmask(SIG_SETMASK, [], [pid 5271] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5273] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5271] <... futex resumed>) = 0 [pid 5273] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5271] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = ? [pid 5272] <... futex resumed>) = ? [pid 5272] +++ killed by SIGBUS +++ [pid 5273] +++ killed by SIGBUS +++ [pid 5271] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5271, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./78", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./78", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./78/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./78/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./78/binderfs") = 0 umount2("./78/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./78/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./78/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./78/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./78/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 [ 80.986429][ T5272] loop0: detected capacity change from 0 to 2048 [ 80.997432][ T5272] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./78/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./78") = 0 mkdir("./79", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5274 attached , child_tidptr=0x555556218690) = 5274 [pid 5274] set_robust_list(0x5555562186a0, 24) = 0 [pid 5274] chdir("./79") = 0 [pid 5274] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5274] setpgid(0, 0) = 0 [pid 5274] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5274] write(3, "1000", 4) = 4 [pid 5274] close(3) = 0 [pid 5274] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5274] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5274] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5274] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5274] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5274] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5274] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5274] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5275]}, 88) = 5275 [pid 5274] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5274] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5274] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5275 attached [pid 5275] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5275] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5275] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5275] memfd_create("syzkaller", 0) = 3 [pid 5275] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5275] 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 5275] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5275] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5275] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5275] close(3) = 0 [pid 5275] mkdir("./file0", 0777) = 0 [pid 5275] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5275] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5275] chdir("./file0") = 0 [pid 5275] ioctl(4, LOOP_CLR_FD) = 0 [pid 5275] close(4) = 0 [pid 5275] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5274] <... futex resumed>) = 0 [pid 5275] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5274] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5275] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5274] <... futex resumed>) = 0 [pid 5275] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5274] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5275] <... open resumed>) = 4 [pid 5275] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5274] <... futex resumed>) = 0 [pid 5275] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5274] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5274] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5275] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5275] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5275] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5274] <... futex resumed>) = 0 [pid 5275] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5274] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5275] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5274] <... futex resumed>) = 0 [pid 5275] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5274] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5274] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5275] <... mmap resumed>) = 0x20000000 [pid 5274] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5275] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5274] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5275] <... futex resumed>) = 0 [pid 5275] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5274] <... mprotect resumed>) = 0 [pid 5274] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5274] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5276]}, 88) = 5276 [pid 5274] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5274] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5274] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5276 attached [pid 5276] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5276] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5276] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5276] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5275] <... futex resumed>) = ? [pid 5275] +++ killed by SIGBUS +++ [pid 5274] <... futex resumed>) = ? [pid 5276] +++ killed by SIGBUS +++ [pid 5274] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5274, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./79", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./79", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./79/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./79/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./79/binderfs") = 0 [ 81.084059][ T5275] loop0: detected capacity change from 0 to 2048 [ 81.102735][ T5275] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./79/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./79/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./79/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./79/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./79/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./79/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./79") = 0 mkdir("./80", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5277 attached , child_tidptr=0x555556218690) = 5277 [pid 5277] set_robust_list(0x5555562186a0, 24) = 0 [pid 5277] chdir("./80") = 0 [pid 5277] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5277] setpgid(0, 0) = 0 [pid 5277] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5277] write(3, "1000", 4) = 4 [pid 5277] close(3) = 0 [pid 5277] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5277] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5277] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5277] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5277] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5277] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5277] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5277] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5278 attached [pid 5278] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5277] <... clone3 resumed> => {parent_tid=[5278]}, 88) = 5278 [pid 5278] <... rseq resumed>) = 0 [pid 5277] rt_sigprocmask(SIG_SETMASK, [], [pid 5278] set_robust_list(0x7f3dc90769a0, 24 [pid 5277] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5278] <... set_robust_list resumed>) = 0 [pid 5277] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5278] rt_sigprocmask(SIG_SETMASK, [], [pid 5277] <... futex resumed>) = 0 [pid 5278] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5277] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5278] memfd_create("syzkaller", 0) = 3 [pid 5278] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5278] 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 5278] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5278] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5278] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5278] close(3) = 0 [pid 5278] mkdir("./file0", 0777) = 0 [pid 5278] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5278] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5278] chdir("./file0") = 0 [pid 5278] ioctl(4, LOOP_CLR_FD) = 0 [pid 5278] close(4) = 0 [pid 5278] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5278] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5277] <... futex resumed>) = 0 [pid 5277] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5278] <... futex resumed>) = 0 [pid 5277] <... futex resumed>) = 1 [pid 5278] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5277] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5278] <... open resumed>) = 4 [pid 5278] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5277] <... futex resumed>) = 0 [pid 5278] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5277] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5278] <... futex resumed>) = 0 [pid 5277] <... futex resumed>) = 1 [pid 5278] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5277] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5278] <... open resumed>) = 5 [pid 5278] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5277] <... futex resumed>) = 0 [pid 5278] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5277] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5278] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5277] <... futex resumed>) = 0 [pid 5278] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5277] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5277] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5278] <... mmap resumed>) = 0x20000000 [pid 5277] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5278] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5278] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5277] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5277] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5277] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5279 attached => {parent_tid=[5279]}, 88) = 5279 [pid 5277] rt_sigprocmask(SIG_SETMASK, [], [pid 5279] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5277] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5279] <... rseq resumed>) = 0 [pid 5277] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5279] set_robust_list(0x7f3dc0d559a0, 24 [pid 5277] <... futex resumed>) = 0 [pid 5279] <... set_robust_list resumed>) = 0 [pid 5277] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5279] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5279] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5277] <... futex resumed>) = ? [pid 5278] <... futex resumed>) = ? [pid 5278] +++ killed by SIGBUS +++ [pid 5279] +++ killed by SIGBUS +++ [pid 5277] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5277, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./80", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./80", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./80/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./80/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./80/binderfs") = 0 umount2("./80/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./80/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./80/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./80/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./80/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 [ 81.215558][ T5278] loop0: detected capacity change from 0 to 2048 [ 81.227358][ T5278] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) rmdir("./80/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./80") = 0 mkdir("./81", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5280 attached , child_tidptr=0x555556218690) = 5280 [pid 5280] set_robust_list(0x5555562186a0, 24) = 0 [pid 5280] chdir("./81") = 0 [pid 5280] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5280] setpgid(0, 0) = 0 [pid 5280] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5280] write(3, "1000", 4) = 4 [pid 5280] close(3) = 0 [pid 5280] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5280] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5280] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5280] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5280] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5280] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5280] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5280] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5281]}, 88) = 5281 [pid 5280] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5280] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5280] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5281 attached [pid 5281] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5281] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5281] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5281] memfd_create("syzkaller", 0) = 3 [pid 5281] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5281] 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 5281] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5281] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5281] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5281] close(3) = 0 [pid 5281] mkdir("./file0", 0777) = 0 [pid 5281] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5281] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5281] chdir("./file0") = 0 [pid 5281] ioctl(4, LOOP_CLR_FD) = 0 [pid 5281] close(4) = 0 [pid 5281] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5281] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5280] <... futex resumed>) = 0 [pid 5280] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5281] <... futex resumed>) = 0 [pid 5281] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5281] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5281] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5280] <... futex resumed>) = 1 [pid 5280] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5280] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5281] <... futex resumed>) = 0 [pid 5281] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5280] <... futex resumed>) = 1 [pid 5281] <... open resumed>) = 5 [pid 5280] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5281] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5280] <... futex resumed>) = 0 [pid 5280] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5281] <... futex resumed>) = 1 [pid 5280] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5281] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5280] <... futex resumed>) = 0 [pid 5280] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5281] <... mmap resumed>) = 0x20000000 [pid 5281] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5281] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5280] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5280] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5280] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5282]}, 88) = 5282 ./strace-static-x86_64: Process 5282 attached [pid 5280] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5280] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5280] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5282] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5282] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5282] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5282] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5281] <... futex resumed>) = ? [pid 5280] <... futex resumed>) = ? [pid 5282] +++ killed by SIGBUS +++ [pid 5281] +++ killed by SIGBUS +++ [pid 5280] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5280, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./81", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./81", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./81/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./81/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./81/binderfs") = 0 [ 81.321451][ T5281] loop0: detected capacity change from 0 to 2048 [ 81.340463][ T5281] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./81/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./81/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./81/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./81/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./81/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./81/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./81") = 0 mkdir("./82", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5283 attached , child_tidptr=0x555556218690) = 5283 [pid 5283] set_robust_list(0x5555562186a0, 24) = 0 [pid 5283] chdir("./82") = 0 [pid 5283] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5283] setpgid(0, 0) = 0 [pid 5283] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5283] write(3, "1000", 4) = 4 [pid 5283] close(3) = 0 [pid 5283] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5283] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5283] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5283] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5283] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5283] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5283] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5283] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5284 attached => {parent_tid=[5284]}, 88) = 5284 [pid 5284] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5283] rt_sigprocmask(SIG_SETMASK, [], [pid 5284] <... rseq resumed>) = 0 [pid 5283] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5284] set_robust_list(0x7f3dc90769a0, 24 [pid 5283] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5284] <... set_robust_list resumed>) = 0 [pid 5284] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5284] memfd_create("syzkaller", 0 [pid 5283] <... futex resumed>) = 0 [pid 5284] <... memfd_create resumed>) = 3 [pid 5283] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5284] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5284] 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 5284] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5284] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5284] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5284] close(3) = 0 [pid 5284] mkdir("./file0", 0777) = 0 [pid 5284] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5284] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5284] chdir("./file0") = 0 [pid 5284] ioctl(4, LOOP_CLR_FD) = 0 [pid 5284] close(4) = 0 [pid 5284] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5284] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5283] <... futex resumed>) = 0 [pid 5283] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5284] <... futex resumed>) = 0 [pid 5283] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5284] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5284] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5283] <... futex resumed>) = 0 [pid 5284] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5283] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5284] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5284] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5283] <... futex resumed>) = 0 [pid 5283] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5284] <... open resumed>) = 5 [pid 5284] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5283] <... futex resumed>) = 0 [pid 5284] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5283] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5284] <... futex resumed>) = 0 [pid 5283] <... futex resumed>) = 1 [pid 5283] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5284] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5283] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5284] <... mmap resumed>) = 0x20000000 [pid 5283] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5283] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5283] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5285 attached => {parent_tid=[5285]}, 88) = 5285 [pid 5285] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5283] rt_sigprocmask(SIG_SETMASK, [], [pid 5285] set_robust_list(0x7f3dc0d559a0, 24 [pid 5283] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5285] <... set_robust_list resumed>) = 0 [pid 5283] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5285] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5283] <... futex resumed>) = 0 [pid 5285] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5283] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5284] +++ killed by SIGBUS +++ [pid 5285] +++ killed by SIGBUS +++ [pid 5283] <... futex resumed>) = ? [pid 5283] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5283, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./82", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./82", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./82/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./82/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./82/binderfs") = 0 [ 81.454984][ T5284] loop0: detected capacity change from 0 to 2048 [ 81.466261][ T5284] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./82/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./82/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./82/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./82/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./82/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./82/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./82") = 0 mkdir("./83", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5286 attached [pid 5286] set_robust_list(0x5555562186a0, 24 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5286 [pid 5286] <... set_robust_list resumed>) = 0 [pid 5286] chdir("./83") = 0 [pid 5286] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5286] setpgid(0, 0) = 0 [pid 5286] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5286] write(3, "1000", 4) = 4 [pid 5286] close(3) = 0 [pid 5286] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5286] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5286] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5286] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5286] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5286] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5286] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5287 attached => {parent_tid=[5287]}, 88) = 5287 [pid 5286] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5286] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5286] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5287] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5287] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5287] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5287] memfd_create("syzkaller", 0) = 3 [pid 5287] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5287] 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 5287] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5287] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5287] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5287] close(3) = 0 [pid 5287] mkdir("./file0", 0777) = 0 [pid 5287] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5287] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5287] chdir("./file0") = 0 [pid 5287] ioctl(4, LOOP_CLR_FD) = 0 [pid 5287] close(4) = 0 [pid 5287] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5286] <... futex resumed>) = 0 [pid 5287] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5286] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5286] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5287] <... open resumed>) = 4 [pid 5287] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5286] <... futex resumed>) = 0 [pid 5287] <... futex resumed>) = 1 [pid 5286] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5287] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5286] <... futex resumed>) = 0 [pid 5287] <... open resumed>) = 5 [pid 5286] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5287] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5286] <... futex resumed>) = 0 [pid 5286] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5286] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5287] <... futex resumed>) = 1 [pid 5286] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5287] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5286] <... mprotect resumed>) = 0 [pid 5287] <... mmap resumed>) = 0x20000000 [pid 5286] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5286] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5287] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5287] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5286] <... clone3 resumed> => {parent_tid=[5288]}, 88) = 5288 [pid 5286] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5286] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5286] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5288 attached [pid 5288] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5288] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5288] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5288] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5286] <... futex resumed>) = ? [pid 5288] +++ killed by SIGBUS +++ [pid 5287] <... futex resumed>) = ? [pid 5287] +++ killed by SIGBUS +++ [pid 5286] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5286, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./83", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./83", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./83/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./83/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./83/binderfs") = 0 umount2("./83/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./83/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./83/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./83/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./83/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./83/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./83") = 0 mkdir("./84", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5289 [ 81.586580][ T5287] loop0: detected capacity change from 0 to 2048 [ 81.598035][ T5287] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ./strace-static-x86_64: Process 5289 attached [pid 5289] set_robust_list(0x5555562186a0, 24) = 0 [pid 5289] chdir("./84") = 0 [pid 5289] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5289] setpgid(0, 0) = 0 [pid 5289] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5289] write(3, "1000", 4) = 4 [pid 5289] close(3) = 0 [pid 5289] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5289] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5289] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5289] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5289] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5289] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5290]}, 88) = 5290 [pid 5289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5289] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5290 attached [pid 5290] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5290] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5290] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5290] memfd_create("syzkaller", 0) = 3 [pid 5290] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5290] 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 5290] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5290] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5290] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5290] close(3) = 0 [pid 5290] mkdir("./file0", 0777) = 0 [pid 5290] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5290] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5290] chdir("./file0") = 0 [pid 5290] ioctl(4, LOOP_CLR_FD) = 0 [pid 5290] close(4) = 0 [pid 5290] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5289] <... futex resumed>) = 0 [pid 5290] <... futex resumed>) = 1 [pid 5289] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5290] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5289] <... futex resumed>) = 0 [pid 5290] <... open resumed>) = 4 [pid 5289] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5290] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5289] <... futex resumed>) = 0 [pid 5290] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5289] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5290] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5289] <... futex resumed>) = 0 [pid 5290] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5289] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5290] <... open resumed>) = 5 [pid 5290] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5289] <... futex resumed>) = 0 [pid 5289] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5289] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5290] <... futex resumed>) = 1 [pid 5289] <... mprotect resumed>) = 0 [pid 5290] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< {parent_tid=[5291]}, 88) = 5291 [pid 5289] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5289] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5289] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5290] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5290] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 5291 attached [pid 5291] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5291] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5291] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5291] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5290] <... futex resumed>) = ? [pid 5291] +++ killed by SIGBUS +++ [pid 5290] +++ killed by SIGBUS +++ [pid 5289] <... futex resumed>) = ? [pid 5289] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5289, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./84", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./84", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./84/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./84/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./84/binderfs") = 0 umount2("./84/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./84/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./84/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./84/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./84/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./84/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./84") = 0 mkdir("./85", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5292 attached , child_tidptr=0x555556218690) = 5292 [pid 5292] set_robust_list(0x5555562186a0, 24) = 0 [pid 5292] chdir("./85") = 0 [pid 5292] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5292] setpgid(0, 0) = 0 [pid 5292] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5292] write(3, "1000", 4) = 4 [pid 5292] close(3) = 0 [pid 5292] symlink("/dev/binderfs", "./binderfs") = 0 [ 81.694520][ T5290] loop0: detected capacity change from 0 to 2048 [ 81.705704][ T5290] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5292] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5292] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5292] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5292] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5292] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5292] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5292] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5293 attached => {parent_tid=[5293]}, 88) = 5293 [pid 5293] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5292] rt_sigprocmask(SIG_SETMASK, [], [pid 5293] set_robust_list(0x7f3dc90769a0, 24 [pid 5292] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5292] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5293] <... set_robust_list resumed>) = 0 [pid 5293] rt_sigprocmask(SIG_SETMASK, [], [pid 5292] <... futex resumed>) = 0 [pid 5293] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5292] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5293] memfd_create("syzkaller", 0) = 3 [pid 5293] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5293] 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 5293] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5293] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5293] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5293] close(3) = 0 [pid 5293] mkdir("./file0", 0777) = 0 [pid 5293] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5293] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5293] chdir("./file0") = 0 [pid 5293] ioctl(4, LOOP_CLR_FD) = 0 [pid 5293] close(4) = 0 [pid 5293] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5292] <... futex resumed>) = 0 [pid 5293] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5292] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5293] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5292] <... futex resumed>) = 0 [pid 5293] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5292] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5293] <... open resumed>) = 4 [pid 5293] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5292] <... futex resumed>) = 0 [pid 5292] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5292] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5293] <... futex resumed>) = 1 [pid 5293] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5293] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5292] <... futex resumed>) = 0 [pid 5292] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5292] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5292] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5292] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5292] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5292] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5293] <... futex resumed>) = 1 [pid 5292] <... clone3 resumed> => {parent_tid=[5294]}, 88) = 5294 [pid 5292] rt_sigprocmask(SIG_SETMASK, [], [pid 5293] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5292] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5293] <... mmap resumed>) = 0x20000000 [pid 5292] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5292] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5293] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5293] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 5294 attached [pid 5294] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5294] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5294] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5294] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5293] <... futex resumed>) = ? [pid 5292] <... futex resumed>) = ? [pid 5294] +++ killed by SIGBUS +++ [pid 5293] +++ killed by SIGBUS +++ [ 81.779223][ T5293] loop0: detected capacity change from 0 to 2048 [ 81.794832][ T5293] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5292] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5292, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./85", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./85", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./85/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./85/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./85/binderfs") = 0 umount2("./85/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./85/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./85/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./85/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./85/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./85/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./85") = 0 mkdir("./86", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5295 ./strace-static-x86_64: Process 5295 attached [pid 5295] set_robust_list(0x5555562186a0, 24) = 0 [pid 5295] chdir("./86") = 0 [pid 5295] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5295] setpgid(0, 0) = 0 [pid 5295] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5295] write(3, "1000", 4) = 4 [pid 5295] close(3) = 0 [pid 5295] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5295] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5295] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5295] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5295] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5295] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5295] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5295] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5296 attached => {parent_tid=[5296]}, 88) = 5296 [pid 5296] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5295] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5296] <... rseq resumed>) = 0 [pid 5295] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5296] set_robust_list(0x7f3dc90769a0, 24 [pid 5295] <... futex resumed>) = 0 [pid 5296] <... set_robust_list resumed>) = 0 [pid 5296] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5296] memfd_create("syzkaller", 0 [pid 5295] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5296] <... memfd_create resumed>) = 3 [pid 5296] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5296] 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 5296] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5296] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 81.892896][ T5296] __do_sys_memfd_create: 33 callbacks suppressed [ 81.892914][ T5296] syz-executor183[5296]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [pid 5296] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5296] close(3) = 0 [pid 5296] mkdir("./file0", 0777) = 0 [pid 5296] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5296] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5296] chdir("./file0") = 0 [pid 5296] ioctl(4, LOOP_CLR_FD) = 0 [pid 5296] close(4) = 0 [pid 5296] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5296] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5295] <... futex resumed>) = 0 [pid 5295] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5296] <... futex resumed>) = 0 [pid 5295] <... futex resumed>) = 1 [pid 5296] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5295] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5296] <... open resumed>) = 4 [pid 5296] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5295] <... futex resumed>) = 0 [pid 5296] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5295] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5296] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5296] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5295] <... futex resumed>) = 0 [pid 5296] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5295] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5296] <... futex resumed>) = 0 [pid 5296] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5295] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5295] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5296] <... futex resumed>) = 0 [pid 5295] <... futex resumed>) = 1 [pid 5296] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5296] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5295] <... futex resumed>) = 0 [pid 5296] <... futex resumed>) = 0 [pid 5295] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5296] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5295] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5295] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5295] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5295] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5297 attached [pid 5297] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5295] <... clone3 resumed> => {parent_tid=[5297]}, 88) = 5297 [pid 5297] <... rseq resumed>) = 0 [pid 5295] rt_sigprocmask(SIG_SETMASK, [], [pid 5297] set_robust_list(0x7f3dc0d559a0, 24 [pid 5295] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5297] <... set_robust_list resumed>) = 0 [pid 5295] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5297] rt_sigprocmask(SIG_SETMASK, [], [pid 5295] <... futex resumed>) = 0 [pid 5297] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5295] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5297] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5296] <... futex resumed>) = ? [pid 5295] <... futex resumed>) = ? [pid 5296] +++ killed by SIGBUS +++ [pid 5297] +++ killed by SIGBUS +++ [pid 5295] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5295, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./86", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./86", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./86/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./86/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./86/binderfs") = 0 [ 81.939347][ T5296] loop0: detected capacity change from 0 to 2048 [ 81.951933][ T5296] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./86/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./86/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./86/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./86/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./86/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./86/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./86") = 0 mkdir("./87", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5298 attached , child_tidptr=0x555556218690) = 5298 [pid 5298] set_robust_list(0x5555562186a0, 24) = 0 [pid 5298] chdir("./87") = 0 [pid 5298] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5298] setpgid(0, 0) = 0 [pid 5298] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5298] write(3, "1000", 4) = 4 [pid 5298] close(3) = 0 [pid 5298] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5298] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5298] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5298] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5298] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5298] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5298] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5298] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5299 attached => {parent_tid=[5299]}, 88) = 5299 [pid 5299] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5298] rt_sigprocmask(SIG_SETMASK, [], [pid 5299] <... rseq resumed>) = 0 [pid 5299] set_robust_list(0x7f3dc90769a0, 24 [pid 5298] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5299] <... set_robust_list resumed>) = 0 [pid 5299] rt_sigprocmask(SIG_SETMASK, [], [pid 5298] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5299] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5298] <... futex resumed>) = 0 [pid 5298] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5299] memfd_create("syzkaller", 0) = 3 [pid 5299] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5299] 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 5299] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5299] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5299] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5299] close(3) = 0 [pid 5299] mkdir("./file0", 0777) = 0 [pid 5299] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5299] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5299] chdir("./file0") = 0 [pid 5299] ioctl(4, LOOP_CLR_FD) = 0 [pid 5299] close(4) = 0 [pid 5299] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5299] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5298] <... futex resumed>) = 0 [pid 5298] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5299] <... futex resumed>) = 0 [pid 5298] <... futex resumed>) = 1 [pid 5299] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5298] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5299] <... open resumed>) = 4 [pid 5299] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5298] <... futex resumed>) = 0 [pid 5299] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5298] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5298] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5299] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5299] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5299] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5298] <... futex resumed>) = 0 [pid 5299] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5298] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5299] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5298] <... futex resumed>) = 0 [pid 5299] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5298] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5298] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5299] <... mmap resumed>) = 0x20000000 [pid 5299] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5299] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5298] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5298] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5298] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5298] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5300 attached [pid 5300] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5300] set_robust_list(0x7f3dc0d559a0, 24 [pid 5298] <... clone3 resumed> => {parent_tid=[5300]}, 88) = 5300 [pid 5300] <... set_robust_list resumed>) = 0 [pid 5298] rt_sigprocmask(SIG_SETMASK, [], [pid 5300] rt_sigprocmask(SIG_SETMASK, [], [pid 5298] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5298] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5298] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5300] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5300] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5298] <... futex resumed>) = ? [pid 5299] <... futex resumed>) = ? [pid 5300] +++ killed by SIGBUS +++ [pid 5299] +++ killed by SIGBUS +++ [pid 5298] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5298, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./87", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./87", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./87/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./87/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./87/binderfs") = 0 [ 82.057540][ T5299] syz-executor183[5299]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 82.080048][ T5299] loop0: detected capacity change from 0 to 2048 [ 82.091810][ T5299] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./87/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./87/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./87/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./87/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./87/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./87/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./87") = 0 mkdir("./88", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5301 attached , child_tidptr=0x555556218690) = 5301 [pid 5301] set_robust_list(0x5555562186a0, 24) = 0 [pid 5301] chdir("./88") = 0 [pid 5301] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5301] setpgid(0, 0) = 0 [pid 5301] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5301] write(3, "1000", 4) = 4 [pid 5301] close(3) = 0 [pid 5301] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5301] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5301] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5301] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5301] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5301] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5301] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5301] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5302]}, 88) = 5302 ./strace-static-x86_64: Process 5302 attached [pid 5301] rt_sigprocmask(SIG_SETMASK, [], [pid 5302] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5302] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5301] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5301] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5301] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5302] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5302] memfd_create("syzkaller", 0) = 3 [pid 5302] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5302] 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 5302] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5302] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5302] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5302] close(3) = 0 [pid 5302] mkdir("./file0", 0777) = 0 [pid 5302] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5302] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5302] chdir("./file0") = 0 [pid 5302] ioctl(4, LOOP_CLR_FD) = 0 [pid 5302] close(4) = 0 [pid 5302] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5301] <... futex resumed>) = 0 [pid 5302] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5301] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5302] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5301] <... futex resumed>) = 0 [pid 5302] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5301] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5302] <... open resumed>) = 4 [pid 5302] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5301] <... futex resumed>) = 0 [pid 5302] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5301] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5302] <... open resumed>) = 5 [pid 5301] <... futex resumed>) = 0 [pid 5302] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5301] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5302] <... futex resumed>) = 0 [pid 5301] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5301] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5301] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5301] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5301] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5301] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5301] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5303]}, 88) = 5303 [pid 5301] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5301] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5301] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5302] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5303] rt_sigprocmask(SIG_SETMASK, [], [pid 5302] <... futex resumed>) = 0 [pid 5303] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5302] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5303] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5302] <... futex resumed>) = ? [pid 5301] <... futex resumed>) = ? [pid 5303] +++ killed by SIGBUS +++ [pid 5302] +++ killed by SIGBUS +++ [pid 5301] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5301, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./88", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./88", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./88/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./88/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./88/binderfs") = 0 umount2("./88/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./88/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./88/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./88/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./88/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./88/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./88") = 0 mkdir("./89", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5304 attached , child_tidptr=0x555556218690) = 5304 [pid 5304] set_robust_list(0x5555562186a0, 24) = 0 [pid 5304] chdir("./89") = 0 [pid 5304] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5304] setpgid(0, 0) = 0 [pid 5304] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [ 82.168971][ T5302] syz-executor183[5302]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 82.192932][ T5302] loop0: detected capacity change from 0 to 2048 [ 82.204839][ T5302] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5304] write(3, "1000", 4) = 4 [pid 5304] close(3) = 0 [pid 5304] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5304] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5304] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5304] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5304] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5304] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5304] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5304] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5305 attached => {parent_tid=[5305]}, 88) = 5305 [pid 5304] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5304] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5304] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5305] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5305] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5305] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5305] memfd_create("syzkaller", 0) = 3 [pid 5305] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5305] 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 5305] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5305] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5305] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5305] close(3) = 0 [pid 5305] mkdir("./file0", 0777) = 0 [ 82.258260][ T5305] syz-executor183[5305]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 82.290832][ T5305] loop0: detected capacity change from 0 to 2048 [pid 5305] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5305] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5305] chdir("./file0") = 0 [pid 5305] ioctl(4, LOOP_CLR_FD) = 0 [pid 5305] close(4) = 0 [pid 5305] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5304] <... futex resumed>) = 0 [pid 5305] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5304] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5305] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5304] <... futex resumed>) = 0 [pid 5305] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5304] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5305] <... open resumed>) = 4 [pid 5305] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5304] <... futex resumed>) = 0 [pid 5304] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5305] <... futex resumed>) = 1 [pid 5304] <... futex resumed>) = 0 [pid 5305] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5304] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5305] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5304] <... futex resumed>) = 0 [pid 5304] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5304] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5305] <... futex resumed>) = 1 [pid 5304] <... futex resumed>) = 0 [pid 5305] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5304] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5305] <... mmap resumed>) = 0x20000000 [pid 5304] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5304] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5304] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5305] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5304] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5305] <... futex resumed>) = 0 [pid 5304] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5305] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5304] <... clone3 resumed> => {parent_tid=[5306]}, 88) = 5306 [pid 5304] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5304] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5304] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5306 attached [pid 5306] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5306] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5306] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5306] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5305] <... futex resumed>) = ? [pid 5305] +++ killed by SIGBUS +++ [pid 5304] <... futex resumed>) = ? [pid 5306] +++ killed by SIGBUS +++ [pid 5304] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5304, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./89", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./89", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./89/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./89/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./89/binderfs") = 0 umount2("./89/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./89/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./89/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./89/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./89/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 [ 82.302386][ T5305] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) close(4) = 0 rmdir("./89/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./89") = 0 mkdir("./90", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5307 attached [pid 5307] set_robust_list(0x5555562186a0, 24) = 0 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5307 [pid 5307] chdir("./90") = 0 [pid 5307] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5307] setpgid(0, 0) = 0 [pid 5307] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5307] write(3, "1000", 4) = 4 [pid 5307] close(3) = 0 [pid 5307] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5307] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5307] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5307] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5307] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5307] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5307] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5307] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5308 attached => {parent_tid=[5308]}, 88) = 5308 [pid 5308] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5307] rt_sigprocmask(SIG_SETMASK, [], [pid 5308] <... rseq resumed>) = 0 [pid 5308] set_robust_list(0x7f3dc90769a0, 24 [pid 5307] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5308] <... set_robust_list resumed>) = 0 [pid 5308] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5308] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5307] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5308] <... futex resumed>) = 0 [pid 5307] <... futex resumed>) = 1 [pid 5308] memfd_create("syzkaller", 0 [pid 5307] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5308] <... memfd_create resumed>) = 3 [pid 5308] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5308] 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 5308] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5308] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5308] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5308] close(3) = 0 [pid 5308] mkdir("./file0", 0777) = 0 [pid 5308] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5308] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5308] chdir("./file0") = 0 [pid 5308] ioctl(4, LOOP_CLR_FD) = 0 [pid 5308] close(4) = 0 [pid 5308] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5308] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5307] <... futex resumed>) = 0 [pid 5307] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5308] <... futex resumed>) = 0 [pid 5308] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5308] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5308] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5307] <... futex resumed>) = 1 [pid 5307] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5307] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5308] <... futex resumed>) = 0 [pid 5308] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5308] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5308] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5307] <... futex resumed>) = 1 [pid 5307] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5307] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5308] <... futex resumed>) = 0 [pid 5308] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5307] <... futex resumed>) = 1 [pid 5307] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5308] <... futex resumed>) = 0 [pid 5308] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5308] +++ killed by SIGBUS +++ [pid 5307] <... futex resumed>) = ? [pid 5307] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5307, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./90", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./90", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./90/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./90/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./90/binderfs") = 0 [ 82.379520][ T5308] syz-executor183[5308]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 82.404707][ T5308] loop0: detected capacity change from 0 to 2048 [ 82.415765][ T5308] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./90/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./90/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./90/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./90/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./90/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./90/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./90") = 0 mkdir("./91", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5309 ./strace-static-x86_64: Process 5309 attached [pid 5309] set_robust_list(0x5555562186a0, 24) = 0 [pid 5309] chdir("./91") = 0 [pid 5309] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5309] setpgid(0, 0) = 0 [pid 5309] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5309] write(3, "1000", 4) = 4 [pid 5309] close(3) = 0 [pid 5309] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5309] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5309] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5309] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5309] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5309] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5309] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5309] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5310]}, 88) = 5310 [pid 5309] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5309] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5310 attached ) = 0 [pid 5310] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5309] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5310] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5310] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5310] memfd_create("syzkaller", 0) = 3 [pid 5310] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5310] 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 5310] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5310] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5310] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5310] close(3) = 0 [pid 5310] mkdir("./file0", 0777) = 0 [pid 5310] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5310] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5310] chdir("./file0") = 0 [pid 5310] ioctl(4, LOOP_CLR_FD) = 0 [pid 5310] close(4) = 0 [pid 5310] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5309] <... futex resumed>) = 0 [pid 5310] <... futex resumed>) = 1 [pid 5309] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5310] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5309] <... futex resumed>) = 0 [pid 5309] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5310] <... open resumed>) = 4 [pid 5310] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5309] <... futex resumed>) = 0 [pid 5310] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5309] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5310] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5309] <... futex resumed>) = 0 [pid 5310] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5309] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5310] <... open resumed>) = 5 [pid 5310] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5309] <... futex resumed>) = 0 [pid 5309] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5309] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5309] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5310] <... futex resumed>) = 1 [pid 5310] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5309] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5310] <... mmap resumed>) = 0x20000000 [pid 5309] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5310] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5309] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5310] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5309] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5311]}, 88) = 5311 [pid 5309] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5309] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 5311 attached [pid 5311] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5309] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5311] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5311] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5311] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5309] <... futex resumed>) = ? [pid 5310] <... futex resumed>) = ? [pid 5311] +++ killed by SIGBUS +++ [pid 5310] +++ killed by SIGBUS +++ [pid 5309] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5309, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./91", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./91", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./91/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./91/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./91/binderfs") = 0 [ 82.507380][ T5310] syz-executor183[5310]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 82.530120][ T5310] loop0: detected capacity change from 0 to 2048 [ 82.542074][ T5310] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./91/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./91/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./91/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./91/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./91/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./91/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./91") = 0 mkdir("./92", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5312 attached , child_tidptr=0x555556218690) = 5312 [pid 5312] set_robust_list(0x5555562186a0, 24) = 0 [pid 5312] chdir("./92") = 0 [pid 5312] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5312] setpgid(0, 0) = 0 [pid 5312] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5312] write(3, "1000", 4) = 4 [pid 5312] close(3) = 0 [pid 5312] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5312] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5312] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5312] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5312] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5312] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5312] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5312] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5313]}, 88) = 5313 [pid 5312] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5312] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5312] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5313 attached [pid 5313] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5313] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5313] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5313] memfd_create("syzkaller", 0) = 3 [pid 5313] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5313] 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 5313] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5313] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5313] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5313] close(3) = 0 [pid 5313] mkdir("./file0", 0777) = 0 [pid 5313] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5313] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5313] chdir("./file0") = 0 [pid 5313] ioctl(4, LOOP_CLR_FD) = 0 [pid 5313] close(4) = 0 [pid 5313] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5312] <... futex resumed>) = 0 [pid 5313] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5312] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5312] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5313] <... open resumed>) = 4 [pid 5313] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5312] <... futex resumed>) = 0 [pid 5313] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5312] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5313] <... open resumed>) = 5 [pid 5312] <... futex resumed>) = 0 [pid 5312] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5313] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5312] <... futex resumed>) = 0 [pid 5312] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5312] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5313] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5312] <... futex resumed>) = 0 [pid 5312] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5313] <... mmap resumed>) = 0x20000000 [pid 5312] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5312] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5313] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5312] <... mprotect resumed>) = 0 [pid 5312] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5312] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5313] <... futex resumed>) = 0 ./strace-static-x86_64: Process 5314 attached [pid 5312] <... clone3 resumed> => {parent_tid=[5314]}, 88) = 5314 [pid 5314] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5312] rt_sigprocmask(SIG_SETMASK, [], [pid 5314] <... rseq resumed>) = 0 [pid 5312] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5314] set_robust_list(0x7f3dc0d559a0, 24 [pid 5312] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5314] <... set_robust_list resumed>) = 0 [pid 5312] <... futex resumed>) = 0 [pid 5314] rt_sigprocmask(SIG_SETMASK, [], [pid 5312] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5314] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5313] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5314] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5313] <... futex resumed>) = ? [pid 5312] <... futex resumed>) = ? [pid 5313] +++ killed by SIGBUS +++ [pid 5314] +++ killed by SIGBUS +++ [pid 5312] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5312, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./92", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./92", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./92/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./92/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./92/binderfs") = 0 umount2("./92/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./92/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./92/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./92/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./92/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./92/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./92") = 0 mkdir("./93", 0777) = 0 [ 82.640249][ T5313] syz-executor183[5313]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 82.662757][ T5313] loop0: detected capacity change from 0 to 2048 [ 82.674759][ T5313] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5315 ./strace-static-x86_64: Process 5315 attached [pid 5315] set_robust_list(0x5555562186a0, 24) = 0 [pid 5315] chdir("./93") = 0 [pid 5315] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5315] setpgid(0, 0) = 0 [pid 5315] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5315] write(3, "1000", 4) = 4 [pid 5315] close(3) = 0 [pid 5315] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5315] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5315] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5315] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5315] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5315] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5315] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5315] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5316 attached => {parent_tid=[5316]}, 88) = 5316 [pid 5315] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5315] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5315] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5316] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5316] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5316] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5316] memfd_create("syzkaller", 0) = 3 [pid 5316] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5316] 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 5316] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5316] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5316] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5316] close(3) = 0 [pid 5316] mkdir("./file0", 0777) = 0 [ 82.740776][ T5316] syz-executor183[5316]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 82.770314][ T5316] loop0: detected capacity change from 0 to 2048 [ 82.782420][ T5316] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5316] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5316] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5316] chdir("./file0") = 0 [pid 5316] ioctl(4, LOOP_CLR_FD) = 0 [pid 5316] close(4) = 0 [pid 5316] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5316] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5315] <... futex resumed>) = 0 [pid 5315] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5315] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5316] <... futex resumed>) = 0 [pid 5316] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5316] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5316] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5315] <... futex resumed>) = 0 [pid 5315] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5316] <... futex resumed>) = 0 [pid 5315] <... futex resumed>) = 1 [pid 5316] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5315] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5316] <... open resumed>) = 5 [pid 5316] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5315] <... futex resumed>) = 0 [pid 5316] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5315] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5316] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5315] <... futex resumed>) = 0 [pid 5316] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5315] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5316] <... mmap resumed>) = 0x20000000 [pid 5315] <... futex resumed>) = 0 [pid 5316] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5315] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5316] <... futex resumed>) = 0 [pid 5316] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5315] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5315] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5315] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5315] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5317 attached [pid 5317] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5315] <... clone3 resumed> => {parent_tid=[5317]}, 88) = 5317 [pid 5317] <... rseq resumed>) = 0 [pid 5315] rt_sigprocmask(SIG_SETMASK, [], [pid 5317] set_robust_list(0x7f3dc0d559a0, 24 [pid 5315] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5317] <... set_robust_list resumed>) = 0 [pid 5317] rt_sigprocmask(SIG_SETMASK, [], [pid 5315] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5317] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5315] <... futex resumed>) = 0 [pid 5317] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5315] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5316] <... futex resumed>) = ? [pid 5315] <... futex resumed>) = ? [pid 5317] +++ killed by SIGBUS +++ [pid 5316] +++ killed by SIGBUS +++ [pid 5315] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5315, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./93", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./93", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./93/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./93/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./93/binderfs") = 0 umount2("./93/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./93/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./93/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./93/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./93/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./93/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./93") = 0 mkdir("./94", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5318 attached , child_tidptr=0x555556218690) = 5318 [pid 5318] set_robust_list(0x5555562186a0, 24) = 0 [pid 5318] chdir("./94") = 0 [pid 5318] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5318] setpgid(0, 0) = 0 [pid 5318] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5318] write(3, "1000", 4) = 4 [pid 5318] close(3) = 0 [pid 5318] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5318] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5318] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5318] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5318] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5318] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5318] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5318] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5319]}, 88) = 5319 [pid 5318] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5318] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5318] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5319 attached [pid 5319] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5319] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5319] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5319] memfd_create("syzkaller", 0) = 3 [pid 5319] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5319] 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 5319] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5319] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5319] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5319] close(3) = 0 [pid 5319] mkdir("./file0", 0777) = 0 [pid 5319] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5319] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5319] chdir("./file0") = 0 [pid 5319] ioctl(4, LOOP_CLR_FD) = 0 [pid 5319] close(4) = 0 [pid 5319] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5318] <... futex resumed>) = 0 [pid 5318] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5318] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5319] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5319] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5318] <... futex resumed>) = 0 [pid 5319] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5318] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5319] <... futex resumed>) = 0 [pid 5318] <... futex resumed>) = 1 [pid 5319] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5318] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5319] <... open resumed>) = 5 [pid 5319] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5318] <... futex resumed>) = 0 [pid 5318] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5318] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5318] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5318] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5319] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5318] <... mprotect resumed>) = 0 [pid 5319] <... mmap resumed>) = 0x20000000 [pid 5318] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5319] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5319] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5318] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5318] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5320 attached [pid 5320] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5318] <... clone3 resumed> => {parent_tid=[5320]}, 88) = 5320 [pid 5320] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5318] rt_sigprocmask(SIG_SETMASK, [], [pid 5320] rt_sigprocmask(SIG_SETMASK, [], [pid 5318] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5320] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5318] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5320] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5318] <... futex resumed>) = 0 [pid 5319] <... futex resumed>) = ? [pid 5320] +++ killed by SIGBUS +++ [pid 5319] +++ killed by SIGBUS +++ [pid 5318] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5318, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./94", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./94", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./94/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./94/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./94/binderfs") = 0 [ 82.869771][ T5319] syz-executor183[5319]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 82.892555][ T5319] loop0: detected capacity change from 0 to 2048 [ 82.904096][ T5319] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./94/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./94/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./94/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./94/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./94/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./94/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./94") = 0 mkdir("./95", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5321 attached , child_tidptr=0x555556218690) = 5321 [pid 5321] set_robust_list(0x5555562186a0, 24) = 0 [pid 5321] chdir("./95") = 0 [pid 5321] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5321] setpgid(0, 0) = 0 [pid 5321] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5321] write(3, "1000", 4) = 4 [pid 5321] close(3) = 0 [pid 5321] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5321] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5321] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5321] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5321] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5321] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5321] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5321] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5322]}, 88) = 5322 [pid 5321] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5321] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5321] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5322 attached [pid 5322] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5322] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5322] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5322] memfd_create("syzkaller", 0) = 3 [pid 5322] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5322] 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 5322] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5322] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5322] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5322] close(3) = 0 [pid 5322] mkdir("./file0", 0777) = 0 [ 82.978147][ T5322] syz-executor183[5322]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set [ 83.018175][ T5322] loop0: detected capacity change from 0 to 2048 [pid 5322] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5322] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5322] chdir("./file0") = 0 [pid 5322] ioctl(4, LOOP_CLR_FD) = 0 [pid 5322] close(4) = 0 [pid 5322] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5321] <... futex resumed>) = 0 [pid 5321] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5321] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5322] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5322] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5322] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5321] <... futex resumed>) = 0 [pid 5321] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5322] <... futex resumed>) = 0 [pid 5321] <... futex resumed>) = 1 [pid 5322] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5321] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5322] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5322] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5321] <... futex resumed>) = 0 [pid 5321] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5322] <... futex resumed>) = 0 [pid 5321] <... futex resumed>) = 1 [pid 5322] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5321] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5321] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5322] <... futex resumed>) = 0 [pid 5322] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5322] +++ killed by SIGBUS +++ [pid 5321] <... futex resumed>) = ? [pid 5321] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5321, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- umount2("./95", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./95", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./95/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./95/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./95/binderfs") = 0 [ 83.029612][ T5322] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./95/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./95/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./95/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./95/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./95/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./95/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./95") = 0 mkdir("./96", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5323 attached , child_tidptr=0x555556218690) = 5323 [pid 5323] set_robust_list(0x5555562186a0, 24) = 0 [pid 5323] chdir("./96") = 0 [pid 5323] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5323] setpgid(0, 0) = 0 [pid 5323] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5323] write(3, "1000", 4) = 4 [pid 5323] close(3) = 0 [pid 5323] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5323] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5323] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5323] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5323] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5323] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5323] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5323] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5324]}, 88) = 5324 [pid 5323] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5323] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5323] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5324 attached [pid 5324] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5324] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5324] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5324] memfd_create("syzkaller", 0) = 3 [pid 5324] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5324] 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 5324] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5324] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5324] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5324] close(3) = 0 [pid 5324] mkdir("./file0", 0777) = 0 [pid 5324] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5324] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5324] chdir("./file0") = 0 [pid 5324] ioctl(4, LOOP_CLR_FD) = 0 [pid 5324] close(4) = 0 [pid 5324] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5323] <... futex resumed>) = 0 [pid 5324] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5323] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5323] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5324] <... open resumed>) = 4 [pid 5324] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5323] <... futex resumed>) = 0 [pid 5324] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5323] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5324] <... futex resumed>) = 0 [pid 5323] <... futex resumed>) = 1 [pid 5324] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5323] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5324] <... open resumed>) = 5 [pid 5324] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5323] <... futex resumed>) = 0 [pid 5324] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5323] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5323] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5323] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5324] <... mmap resumed>) = 0x20000000 [pid 5324] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5323] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5323] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5324] <... futex resumed>) = 0 [pid 5323] <... mprotect resumed>) = 0 [pid 5323] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5323] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5324] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 5325 attached [pid 5325] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5323] <... clone3 resumed> => {parent_tid=[5325]}, 88) = 5325 [pid 5325] <... rseq resumed>) = 0 [pid 5323] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5323] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5323] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5325] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5325] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5325] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5324] <... futex resumed>) = ? [pid 5323] <... futex resumed>) = ? [pid 5325] +++ killed by SIGBUS +++ [pid 5324] +++ killed by SIGBUS +++ [pid 5323] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5323, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./96", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./96", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./96/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./96/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./96/binderfs") = 0 [ 83.141434][ T5324] loop0: detected capacity change from 0 to 2048 [ 83.153810][ T5324] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./96/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./96/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./96/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./96/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./96/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./96/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./96") = 0 mkdir("./97", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5326 attached , child_tidptr=0x555556218690) = 5326 [pid 5326] set_robust_list(0x5555562186a0, 24) = 0 [pid 5326] chdir("./97") = 0 [pid 5326] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5326] setpgid(0, 0) = 0 [pid 5326] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5326] write(3, "1000", 4) = 4 [pid 5326] close(3) = 0 [pid 5326] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5326] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5326] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5326] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5326] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5326] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5326] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5326] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5327 attached [pid 5327] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5326] <... clone3 resumed> => {parent_tid=[5327]}, 88) = 5327 [pid 5327] <... rseq resumed>) = 0 [pid 5326] rt_sigprocmask(SIG_SETMASK, [], [pid 5327] set_robust_list(0x7f3dc90769a0, 24 [pid 5326] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5327] <... set_robust_list resumed>) = 0 [pid 5326] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5327] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5326] <... futex resumed>) = 0 [pid 5327] memfd_create("syzkaller", 0 [pid 5326] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5327] <... memfd_create resumed>) = 3 [pid 5327] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5327] 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 5327] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5327] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5327] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5327] close(3) = 0 [pid 5327] mkdir("./file0", 0777) = 0 [pid 5327] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5327] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5327] chdir("./file0") = 0 [pid 5327] ioctl(4, LOOP_CLR_FD) = 0 [pid 5327] close(4) = 0 [pid 5327] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5327] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5326] <... futex resumed>) = 0 [pid 5326] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5327] <... futex resumed>) = 0 [pid 5327] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5326] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5327] <... open resumed>) = 4 [pid 5327] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5326] <... futex resumed>) = 0 [pid 5327] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5326] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5327] <... futex resumed>) = 0 [pid 5326] <... futex resumed>) = 1 [pid 5327] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5326] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5327] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5327] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5326] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5326] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5327] <... futex resumed>) = 0 [pid 5326] <... futex resumed>) = 1 [pid 5327] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5326] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5327] <... mmap resumed>) = 0x20000000 [pid 5326] <... futex resumed>) = 0 [pid 5326] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5327] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5326] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5327] <... futex resumed>) = 0 [pid 5327] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5326] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5326] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5326] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5328]}, 88) = 5328 [pid 5326] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5326] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5326] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5328 attached [pid 5328] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5328] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5328] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5328] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5327] <... futex resumed>) = ? [pid 5326] <... futex resumed>) = ? [pid 5328] +++ killed by SIGBUS +++ [pid 5327] +++ killed by SIGBUS +++ [pid 5326] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5326, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=6 /* 0.06 s */} --- umount2("./97", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./97", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./97/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./97/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./97/binderfs") = 0 umount2("./97/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./97/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./97/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 83.262973][ T5327] loop0: detected capacity change from 0 to 2048 [ 83.274663][ T5327] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./97/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./97/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./97/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./97") = 0 mkdir("./98", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5329 ./strace-static-x86_64: Process 5329 attached [pid 5329] set_robust_list(0x5555562186a0, 24) = 0 [pid 5329] chdir("./98") = 0 [pid 5329] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5329] setpgid(0, 0) = 0 [pid 5329] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5329] write(3, "1000", 4) = 4 [pid 5329] close(3) = 0 [pid 5329] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5329] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5329] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5329] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5329] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5329] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5329] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5329] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5330]}, 88) = 5330 [pid 5329] rt_sigprocmask(SIG_SETMASK, [], ./strace-static-x86_64: Process 5330 attached NULL, 8) = 0 [pid 5330] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5329] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5330] <... rseq resumed>) = 0 [pid 5329] <... futex resumed>) = 0 [pid 5329] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5330] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5330] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5330] memfd_create("syzkaller", 0) = 3 [pid 5330] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5330] 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 5330] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5330] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5330] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5330] close(3) = 0 [pid 5330] mkdir("./file0", 0777) = 0 [pid 5330] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5330] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5330] chdir("./file0") = 0 [pid 5330] ioctl(4, LOOP_CLR_FD) = 0 [pid 5330] close(4) = 0 [pid 5330] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5329] <... futex resumed>) = 0 [pid 5330] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5329] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5330] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5329] <... futex resumed>) = 0 [pid 5330] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5329] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5330] <... open resumed>) = 4 [pid 5330] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5329] <... futex resumed>) = 0 [pid 5329] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5330] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5329] <... futex resumed>) = 0 [pid 5329] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5330] <... open resumed>) = 5 [pid 5330] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5329] <... futex resumed>) = 0 [pid 5330] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5329] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5330] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5329] <... futex resumed>) = 0 [pid 5330] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5329] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5329] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5329] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5330] <... mmap resumed>) = 0x20000000 [pid 5329] <... mprotect resumed>) = 0 [pid 5329] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5330] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5329] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5330] <... futex resumed>) = 0 [pid 5329] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5330] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 5331 attached [pid 5331] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5329] <... clone3 resumed> => {parent_tid=[5331]}, 88) = 5331 [pid 5331] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5329] rt_sigprocmask(SIG_SETMASK, [], [pid 5331] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5329] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5331] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5329] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5331] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5329] <... futex resumed>) = 0 [pid 5331] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5329] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5330] <... futex resumed>) = ? [pid 5329] <... futex resumed>) = ? [pid 5331] +++ killed by SIGBUS +++ [pid 5330] +++ killed by SIGBUS +++ [pid 5329] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5329, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./98", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./98", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./98/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./98/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./98/binderfs") = 0 [ 83.384464][ T5330] loop0: detected capacity change from 0 to 2048 [ 83.395637][ T5330] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./98/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./98/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./98/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./98/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./98/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./98/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./98") = 0 mkdir("./99", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5332 ./strace-static-x86_64: Process 5332 attached [pid 5332] set_robust_list(0x5555562186a0, 24) = 0 [pid 5332] chdir("./99") = 0 [pid 5332] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5332] setpgid(0, 0) = 0 [pid 5332] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5332] write(3, "1000", 4) = 4 [pid 5332] close(3) = 0 [pid 5332] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5332] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5332] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5332] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5332] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5332] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5332] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5333 attached => {parent_tid=[5333]}, 88) = 5333 [pid 5332] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5332] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5333] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5333] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5333] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5333] memfd_create("syzkaller", 0) = 3 [pid 5333] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5333] 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 5333] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5333] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5333] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5333] close(3) = 0 [pid 5333] mkdir("./file0", 0777) = 0 [pid 5333] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5333] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5333] chdir("./file0") = 0 [pid 5333] ioctl(4, LOOP_CLR_FD) = 0 [pid 5333] close(4) = 0 [pid 5333] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5332] <... futex resumed>) = 0 [pid 5333] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5332] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5333] <... open resumed>) = 4 [pid 5333] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5332] <... futex resumed>) = 0 [pid 5332] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5333] <... futex resumed>) = 1 [pid 5333] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5333] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5332] <... futex resumed>) = 0 [pid 5332] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5332] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5332] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5332] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5334]}, 88) = 5334 ./strace-static-x86_64: Process 5334 attached [pid 5332] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5332] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5332] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5333] <... futex resumed>) = 1 [pid 5333] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5334] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5334] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5333] <... mmap resumed>) = 0x20000000 [pid 5334] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5334] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5333] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = ? [pid 5332] <... futex resumed>) = ? [pid 5333] +++ killed by SIGBUS +++ [pid 5334] +++ killed by SIGBUS +++ [pid 5332] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5332, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./99", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./99", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./99/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./99/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./99/binderfs") = 0 [ 83.494975][ T5333] loop0: detected capacity change from 0 to 2048 [ 83.507565][ T5333] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./99/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./99/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./99/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./99/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./99/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./99/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./99") = 0 mkdir("./100", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5335 attached , child_tidptr=0x555556218690) = 5335 [pid 5335] set_robust_list(0x5555562186a0, 24) = 0 [pid 5335] chdir("./100") = 0 [pid 5335] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5335] setpgid(0, 0) = 0 [pid 5335] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5335] write(3, "1000", 4) = 4 [pid 5335] close(3) = 0 [pid 5335] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5335] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5335] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5335] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5335] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5335] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5335] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5335] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5336 attached [pid 5336] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5336] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5336] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5336] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5335] <... clone3 resumed> => {parent_tid=[5336]}, 88) = 5336 [pid 5335] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5335] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5336] <... futex resumed>) = 0 [pid 5335] <... futex resumed>) = 1 [pid 5336] memfd_create("syzkaller", 0 [pid 5335] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5336] <... memfd_create resumed>) = 3 [pid 5336] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5336] 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 5336] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5336] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5336] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5336] close(3) = 0 [pid 5336] mkdir("./file0", 0777) = 0 [pid 5336] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5336] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5336] chdir("./file0") = 0 [pid 5336] ioctl(4, LOOP_CLR_FD) = 0 [pid 5336] close(4) = 0 [pid 5336] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5335] <... futex resumed>) = 0 [pid 5336] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5335] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5336] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5335] <... futex resumed>) = 0 [pid 5336] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5335] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5336] <... open resumed>) = 4 [pid 5336] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5335] <... futex resumed>) = 0 [pid 5336] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5335] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5336] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5335] <... futex resumed>) = 0 [pid 5336] <... open resumed>) = 5 [pid 5335] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5336] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5335] <... futex resumed>) = 0 [pid 5335] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5335] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5336] <... futex resumed>) = 1 [pid 5335] <... futex resumed>) = 0 [pid 5336] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5335] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5336] <... mmap resumed>) = 0x20000000 [pid 5335] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5335] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5336] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5335] <... mprotect resumed>) = 0 [pid 5336] <... futex resumed>) = 0 [pid 5336] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5335] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5335] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5337]}, 88) = 5337 ./strace-static-x86_64: Process 5337 attached [pid 5335] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5335] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5335] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5337] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5337] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5337] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5337] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5336] <... futex resumed>) = ? [pid 5336] +++ killed by SIGBUS +++ [pid 5335] <... futex resumed>) = ? [pid 5337] +++ killed by SIGBUS +++ [pid 5335] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5335, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./100", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./100", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./100/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./100/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./100/binderfs") = 0 umount2("./100/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./100/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./100/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./100/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./100/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./100/file0") = 0 [ 83.605505][ T5336] loop0: detected capacity change from 0 to 2048 [ 83.618349][ T5336] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./100") = 0 mkdir("./101", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5338 attached , child_tidptr=0x555556218690) = 5338 [pid 5338] set_robust_list(0x5555562186a0, 24) = 0 [pid 5338] chdir("./101") = 0 [pid 5338] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5338] setpgid(0, 0) = 0 [pid 5338] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5338] write(3, "1000", 4) = 4 [pid 5338] close(3) = 0 [pid 5338] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5338] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5338] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5338] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5338] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5338] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5338] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5338] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5339]}, 88) = 5339 [pid 5338] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5338] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5338] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5339 attached [pid 5339] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5339] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5339] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5339] memfd_create("syzkaller", 0) = 3 [pid 5339] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5339] 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 5339] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5339] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5339] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5339] close(3) = 0 [pid 5339] mkdir("./file0", 0777) = 0 [pid 5339] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5339] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5339] chdir("./file0") = 0 [pid 5339] ioctl(4, LOOP_CLR_FD) = 0 [pid 5339] close(4) = 0 [pid 5339] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5338] <... futex resumed>) = 0 [pid 5339] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5338] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5339] <... futex resumed>) = 0 [pid 5338] <... futex resumed>) = 1 [pid 5339] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5338] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5339] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5339] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5338] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5338] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5339] <... futex resumed>) = 0 [pid 5338] <... futex resumed>) = 1 [pid 5339] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5338] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5339] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5338] <... futex resumed>) = 0 [pid 5338] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5339] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1<) = 0 [pid 5338] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5338] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5339] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5339] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5338] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5338] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5338] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5340]}, 88) = 5340 ./strace-static-x86_64: Process 5340 attached [pid 5338] rt_sigprocmask(SIG_SETMASK, [], [pid 5340] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5338] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5340] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5338] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5340] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5338] <... futex resumed>) = 0 [pid 5338] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5340] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5339] <... futex resumed>) = ? [pid 5338] <... futex resumed>) = ? [pid 5340] +++ killed by SIGBUS +++ [pid 5339] +++ killed by SIGBUS +++ [pid 5338] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5338, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./101", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./101", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./101/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./101/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./101/binderfs") = 0 umount2("./101/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./101/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./101/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./101/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./101/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./101/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./101") = 0 mkdir("./102", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 83.718879][ T5339] loop0: detected capacity change from 0 to 2048 [ 83.730547][ T5339] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5341 ./strace-static-x86_64: Process 5341 attached [pid 5341] set_robust_list(0x5555562186a0, 24) = 0 [pid 5341] chdir("./102") = 0 [pid 5341] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5341] setpgid(0, 0) = 0 [pid 5341] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5341] write(3, "1000", 4) = 4 [pid 5341] close(3) = 0 [pid 5341] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5341] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5341] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5341] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5341] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5341] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5341] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5342]}, 88) = 5342 [pid 5341] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5341] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5342 attached [pid 5342] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5342] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5342] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5342] memfd_create("syzkaller", 0) = 3 [pid 5342] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5342] 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 5342] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5342] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5342] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5342] close(3) = 0 [pid 5342] mkdir("./file0", 0777) = 0 [pid 5342] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5342] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5342] chdir("./file0") = 0 [pid 5342] ioctl(4, LOOP_CLR_FD) = 0 [pid 5342] close(4) = 0 [pid 5342] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5342] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5341] <... futex resumed>) = 0 [pid 5341] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5341] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5342] <... futex resumed>) = 0 [pid 5342] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5342] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5342] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5341] <... futex resumed>) = 0 [pid 5341] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5342] <... futex resumed>) = 0 [pid 5342] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5341] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5342] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5341] <... futex resumed>) = 0 [pid 5341] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5341] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5342] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< {parent_tid=[5343]}, 88) = 5343 ./strace-static-x86_64: Process 5343 attached [pid 5341] rt_sigprocmask(SIG_SETMASK, [], [pid 5343] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5342] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5342] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5341] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5341] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5343] <... rseq resumed>) = 0 [pid 5343] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5343] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5343] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5342] <... futex resumed>) = ? [pid 5341] <... futex resumed>) = ? [pid 5343] +++ killed by SIGBUS +++ [ 83.866139][ T5342] loop0: detected capacity change from 0 to 2048 [ 83.879528][ T5342] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5342] +++ killed by SIGBUS +++ [pid 5341] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5341, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=4 /* 0.04 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./102", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./102", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./102/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./102/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./102/binderfs") = 0 umount2("./102/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./102/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./102/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./102/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./102/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./102/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./102") = 0 mkdir("./103", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5344 attached [pid 5344] set_robust_list(0x5555562186a0, 24 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5344 [pid 5344] <... set_robust_list resumed>) = 0 [pid 5344] chdir("./103") = 0 [pid 5344] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5344] setpgid(0, 0) = 0 [pid 5344] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5344] write(3, "1000", 4) = 4 [pid 5344] close(3) = 0 [pid 5344] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5344] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5344] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5344] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5344] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5344] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5344] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5344] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5345 attached [pid 5345] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5344] <... clone3 resumed> => {parent_tid=[5345]}, 88) = 5345 [pid 5345] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5345] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5344] rt_sigprocmask(SIG_SETMASK, [], [pid 5345] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5344] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5344] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5345] <... futex resumed>) = 0 [pid 5345] memfd_create("syzkaller", 0 [pid 5344] <... futex resumed>) = 1 [pid 5344] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5345] <... memfd_create resumed>) = 3 [pid 5345] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5345] 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 5345] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5345] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5345] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5345] close(3) = 0 [pid 5345] mkdir("./file0", 0777) = 0 [pid 5345] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5345] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5345] chdir("./file0") = 0 [pid 5345] ioctl(4, LOOP_CLR_FD) = 0 [pid 5345] close(4) = 0 [pid 5345] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5344] <... futex resumed>) = 0 [pid 5344] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5344] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5345] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5345] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5344] <... futex resumed>) = 0 [pid 5345] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5344] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5345] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5344] <... futex resumed>) = 0 [pid 5345] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5344] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5345] <... open resumed>) = 5 [pid 5345] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5345] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5344] <... futex resumed>) = 0 [pid 5344] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5345] <... futex resumed>) = 0 [pid 5344] <... futex resumed>) = 1 [pid 5345] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5344] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5344] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5345] <... mmap resumed>) = 0x20000000 [pid 5345] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5345] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5344] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5344] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5344] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5344] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5346 attached [pid 5346] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5346] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5346] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5344] <... clone3 resumed> => {parent_tid=[5346]}, 88) = 5346 [pid 5346] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5344] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5344] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5346] <... futex resumed>) = 0 [pid 5344] <... futex resumed>) = 1 [pid 5346] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5344] ???( [pid 5345] <... futex resumed>) = ? [pid 5344] <... ??? resumed>) = ? [pid 5345] +++ killed by SIGBUS +++ [pid 5346] +++ killed by SIGBUS +++ [pid 5344] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5344, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./103", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./103", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./103/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./103/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./103/binderfs") = 0 [ 84.009659][ T5345] loop0: detected capacity change from 0 to 2048 [ 84.021622][ T5345] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./103/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./103/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./103/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./103/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./103/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./103/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./103") = 0 mkdir("./104", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5347 attached [pid 5347] set_robust_list(0x5555562186a0, 24) = 0 [pid 5347] chdir("./104") = 0 [pid 5347] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5347] setpgid(0, 0) = 0 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5347 [pid 5347] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5347] write(3, "1000", 4) = 4 [pid 5347] close(3) = 0 [pid 5347] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5347] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5347] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5347] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5347] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5347] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5347] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5347] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5348]}, 88) = 5348 [pid 5347] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5347] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5347] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5348 attached [pid 5348] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5348] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5348] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5348] memfd_create("syzkaller", 0) = 3 [pid 5348] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5348] 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 5348] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5348] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5348] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5348] close(3) = 0 [pid 5348] mkdir("./file0", 0777) = 0 [pid 5348] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5348] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5348] chdir("./file0") = 0 [pid 5348] ioctl(4, LOOP_CLR_FD) = 0 [pid 5348] close(4) = 0 [pid 5348] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5348] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5347] <... futex resumed>) = 0 [pid 5347] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5348] <... futex resumed>) = 0 [pid 5348] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5348] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5348] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5347] <... futex resumed>) = 1 [pid 5347] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5347] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5348] <... futex resumed>) = 0 [pid 5347] <... futex resumed>) = 1 [pid 5347] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5348] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5348] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5347] <... futex resumed>) = 0 [pid 5348] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5347] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5348] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5347] <... futex resumed>) = 0 [pid 5348] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5347] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5348] <... mmap resumed>) = 0x20000000 [pid 5347] <... futex resumed>) = 0 [pid 5347] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5347] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5348] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5348] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5347] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5347] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5349 attached => {parent_tid=[5349]}, 88) = 5349 [pid 5349] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5347] rt_sigprocmask(SIG_SETMASK, [], [pid 5349] set_robust_list(0x7f3dc0d559a0, 24 [pid 5347] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5349] <... set_robust_list resumed>) = 0 [pid 5347] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5349] rt_sigprocmask(SIG_SETMASK, [], [pid 5347] <... futex resumed>) = 0 [pid 5349] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5347] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5349] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5347] <... futex resumed>) = ? [pid 5349] +++ killed by SIGBUS +++ [pid 5348] <... futex resumed>) = ? [pid 5348] +++ killed by SIGBUS +++ [pid 5347] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5347, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./104", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./104", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./104/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./104/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./104/binderfs") = 0 [ 84.133140][ T5348] loop0: detected capacity change from 0 to 2048 [ 84.145502][ T5348] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./104/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./104/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./104/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./104/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./104/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./104/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./104") = 0 mkdir("./105", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5350 ./strace-static-x86_64: Process 5350 attached [pid 5350] set_robust_list(0x5555562186a0, 24) = 0 [pid 5350] chdir("./105") = 0 [pid 5350] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5350] setpgid(0, 0) = 0 [pid 5350] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5350] write(3, "1000", 4) = 4 [pid 5350] close(3) = 0 [pid 5350] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5350] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5350] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5350] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5350] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5350] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5350] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5350] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5351 attached => {parent_tid=[5351]}, 88) = 5351 [pid 5350] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5350] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5350] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5351] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5351] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5351] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5351] memfd_create("syzkaller", 0) = 3 [pid 5351] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5351] 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 5351] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5351] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5351] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5351] close(3) = 0 [pid 5351] mkdir("./file0", 0777) = 0 [pid 5351] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5351] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5351] chdir("./file0") = 0 [pid 5351] ioctl(4, LOOP_CLR_FD) = 0 [pid 5351] close(4) = 0 [pid 5351] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5350] <... futex resumed>) = 0 [pid 5351] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5350] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5351] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5350] <... futex resumed>) = 0 [pid 5351] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5350] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5351] <... open resumed>) = 4 [pid 5351] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5350] <... futex resumed>) = 0 [pid 5350] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5350] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5351] <... futex resumed>) = 1 [pid 5351] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5351] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5350] <... futex resumed>) = 0 [pid 5351] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5350] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5351] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5350] <... futex resumed>) = 0 [pid 5351] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5350] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5351] <... mmap resumed>) = 0x20000000 [pid 5350] <... futex resumed>) = 0 [pid 5350] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5351] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5351] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5350] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5350] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5350] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5352]}, 88) = 5352 [pid 5350] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5350] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5350] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5352 attached [pid 5352] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5352] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5352] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5352] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5351] <... futex resumed>) = ? [pid 5352] +++ killed by SIGBUS +++ [pid 5351] +++ killed by SIGBUS +++ [pid 5350] <... futex resumed>) = ? [pid 5350] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5350, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./105", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./105", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./105/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./105/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./105/binderfs") = 0 umount2("./105/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./105/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./105/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 84.239571][ T5351] loop0: detected capacity change from 0 to 2048 [ 84.250920][ T5351] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./105/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./105/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./105/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./105") = 0 mkdir("./106", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5353 ./strace-static-x86_64: Process 5353 attached [pid 5353] set_robust_list(0x5555562186a0, 24) = 0 [pid 5353] chdir("./106") = 0 [pid 5353] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5353] setpgid(0, 0) = 0 [pid 5353] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5353] write(3, "1000", 4) = 4 [pid 5353] close(3) = 0 [pid 5353] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5353] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5353] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5353] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5353] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5353] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5353] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5353] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5354 attached => {parent_tid=[5354]}, 88) = 5354 [pid 5354] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5353] rt_sigprocmask(SIG_SETMASK, [], [pid 5354] set_robust_list(0x7f3dc90769a0, 24 [pid 5353] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5354] <... set_robust_list resumed>) = 0 [pid 5353] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5354] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5353] <... futex resumed>) = 0 [pid 5354] memfd_create("syzkaller", 0 [pid 5353] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5354] <... memfd_create resumed>) = 3 [pid 5354] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5354] 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 5354] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5354] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5354] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5354] close(3) = 0 [pid 5354] mkdir("./file0", 0777) = 0 [pid 5354] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5354] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5354] chdir("./file0") = 0 [pid 5354] ioctl(4, LOOP_CLR_FD) = 0 [pid 5354] close(4) = 0 [pid 5354] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5353] <... futex resumed>) = 0 [pid 5354] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5353] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5353] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5354] <... open resumed>) = 4 [pid 5354] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5353] <... futex resumed>) = 0 [pid 5353] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5354] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5353] <... futex resumed>) = 0 [pid 5354] <... open resumed>) = 5 [pid 5353] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5354] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5353] <... futex resumed>) = 0 [pid 5354] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5353] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5354] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5353] <... futex resumed>) = 0 [pid 5354] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5353] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5353] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5354] <... mmap resumed>) = 0x20000000 [pid 5353] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5354] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5353] <... mprotect resumed>) = 0 [pid 5354] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5353] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5353] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5355 attached => {parent_tid=[5355]}, 88) = 5355 [pid 5355] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5353] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5355] <... rseq resumed>) = 0 [pid 5353] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5355] set_robust_list(0x7f3dc0d559a0, 24 [pid 5353] <... futex resumed>) = 0 [pid 5355] <... set_robust_list resumed>) = 0 [pid 5353] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5355] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5355] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5354] <... futex resumed>) = ? [pid 5353] <... futex resumed>) = ? [pid 5355] +++ killed by SIGBUS +++ [pid 5354] +++ killed by SIGBUS +++ [pid 5353] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5353, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./106", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./106", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./106/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./106/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./106/binderfs") = 0 [ 84.356906][ T5354] loop0: detected capacity change from 0 to 2048 [ 84.370519][ T5354] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./106/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./106/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./106/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./106/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./106/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./106/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./106") = 0 mkdir("./107", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5356 attached , child_tidptr=0x555556218690) = 5356 [pid 5356] set_robust_list(0x5555562186a0, 24) = 0 [pid 5356] chdir("./107") = 0 [pid 5356] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5356] setpgid(0, 0) = 0 [pid 5356] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5356] write(3, "1000", 4) = 4 [pid 5356] close(3) = 0 [pid 5356] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5356] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5356] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5356] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5356] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5356] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5356] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5356] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5357]}, 88) = 5357 [pid 5356] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5356] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5356] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5357 attached [pid 5357] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5357] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5357] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5357] memfd_create("syzkaller", 0) = 3 [pid 5357] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5357] 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 5357] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5357] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5357] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5357] close(3) = 0 [pid 5357] mkdir("./file0", 0777) = 0 [pid 5357] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5357] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5357] chdir("./file0") = 0 [pid 5357] ioctl(4, LOOP_CLR_FD) = 0 [pid 5357] close(4) = 0 [pid 5357] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5356] <... futex resumed>) = 0 [pid 5357] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5356] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5357] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5356] <... futex resumed>) = 0 [pid 5357] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5356] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5357] <... open resumed>) = 4 [pid 5357] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5356] <... futex resumed>) = 0 [pid 5357] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5356] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5357] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5356] <... futex resumed>) = 0 [pid 5357] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5356] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5357] <... open resumed>) = 5 [pid 5357] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5356] <... futex resumed>) = 0 [pid 5357] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5356] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5357] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5356] <... futex resumed>) = 0 [pid 5357] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5356] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5357] <... mmap resumed>) = 0x20000000 [pid 5356] <... futex resumed>) = 0 [pid 5356] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5356] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5357] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5356] <... mprotect resumed>) = 0 [pid 5357] <... futex resumed>) = 0 [pid 5356] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5357] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5356] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5356] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5358 attached [pid 5358] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5356] <... clone3 resumed> => {parent_tid=[5358]}, 88) = 5358 [pid 5358] <... rseq resumed>) = 0 [pid 5356] rt_sigprocmask(SIG_SETMASK, [], [pid 5358] set_robust_list(0x7f3dc0d559a0, 24 [pid 5356] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5358] <... set_robust_list resumed>) = 0 [pid 5356] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5358] rt_sigprocmask(SIG_SETMASK, [], [pid 5356] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5358] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5358] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5356] <... futex resumed>) = ? [pid 5357] <... futex resumed>) = ? [pid 5358] +++ killed by SIGBUS +++ [pid 5357] +++ killed by SIGBUS +++ [pid 5356] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5356, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./107", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./107", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./107/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./107/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./107/binderfs") = 0 [ 84.469616][ T5357] loop0: detected capacity change from 0 to 2048 [ 84.481271][ T5357] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./107/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./107/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./107/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./107/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./107/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./107/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./107") = 0 mkdir("./108", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5359 attached , child_tidptr=0x555556218690) = 5359 [pid 5359] set_robust_list(0x5555562186a0, 24) = 0 [pid 5359] chdir("./108") = 0 [pid 5359] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5359] setpgid(0, 0) = 0 [pid 5359] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5359] write(3, "1000", 4) = 4 [pid 5359] close(3) = 0 [pid 5359] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5359] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5359] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5359] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5359] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5359] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5359] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5359] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5360]}, 88) = 5360 ./strace-static-x86_64: Process 5360 attached [pid 5359] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5359] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5359] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5360] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5360] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5360] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5360] memfd_create("syzkaller", 0) = 3 [pid 5360] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5360] 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 5360] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5360] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5360] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5360] close(3) = 0 [pid 5360] mkdir("./file0", 0777) = 0 [pid 5360] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5360] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5360] chdir("./file0") = 0 [pid 5360] ioctl(4, LOOP_CLR_FD) = 0 [pid 5360] close(4) = 0 [pid 5360] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5360] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5359] <... futex resumed>) = 0 [pid 5359] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5360] <... futex resumed>) = 0 [pid 5360] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5359] <... futex resumed>) = 1 [pid 5359] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5360] <... open resumed>) = 4 [pid 5360] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5359] <... futex resumed>) = 0 [pid 5360] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5359] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5360] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5359] <... futex resumed>) = 0 [pid 5360] <... open resumed>) = 5 [pid 5359] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5360] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5359] <... futex resumed>) = 0 [pid 5359] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5359] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5360] <... futex resumed>) = 1 [pid 5360] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5359] <... futex resumed>) = 0 [pid 5360] <... mmap resumed>) = 0x20000000 [pid 5359] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5359] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5360] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5359] <... mprotect resumed>) = 0 [pid 5360] <... futex resumed>) = 0 [pid 5360] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5359] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5359] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5361]}, 88) = 5361 [pid 5359] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5359] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5359] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5361 attached [pid 5361] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5361] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5361] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5361] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5359] <... futex resumed>) = ? [pid 5361] +++ killed by SIGBUS +++ [pid 5360] <... futex resumed>) = ? [pid 5360] +++ killed by SIGBUS +++ [pid 5359] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5359, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./108", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./108", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./108/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./108/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./108/binderfs") = 0 [ 84.600863][ T5360] loop0: detected capacity change from 0 to 2048 [ 84.612681][ T5360] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./108/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./108/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./108/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./108/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./108/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./108/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./108") = 0 mkdir("./109", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5362 ./strace-static-x86_64: Process 5362 attached [pid 5362] set_robust_list(0x5555562186a0, 24) = 0 [pid 5362] chdir("./109") = 0 [pid 5362] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5362] setpgid(0, 0) = 0 [pid 5362] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5362] write(3, "1000", 4) = 4 [pid 5362] close(3) = 0 [pid 5362] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5362] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5362] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5362] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5362] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5362] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5362] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5362] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5363 attached [pid 5363] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5362] <... clone3 resumed> => {parent_tid=[5363]}, 88) = 5363 [pid 5363] <... rseq resumed>) = 0 [pid 5363] set_robust_list(0x7f3dc90769a0, 24 [pid 5362] rt_sigprocmask(SIG_SETMASK, [], [pid 5363] <... set_robust_list resumed>) = 0 [pid 5362] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5363] rt_sigprocmask(SIG_SETMASK, [], [pid 5362] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5363] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5362] <... futex resumed>) = 0 [pid 5363] memfd_create("syzkaller", 0 [pid 5362] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5363] <... memfd_create resumed>) = 3 [pid 5363] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5363] 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 5363] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5363] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5363] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5363] close(3) = 0 [pid 5363] mkdir("./file0", 0777) = 0 [pid 5363] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5363] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5363] chdir("./file0") = 0 [pid 5363] ioctl(4, LOOP_CLR_FD) = 0 [pid 5363] close(4) = 0 [pid 5363] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5362] <... futex resumed>) = 0 [pid 5362] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5363] <... futex resumed>) = 1 [pid 5362] <... futex resumed>) = 0 [pid 5363] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5362] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5363] <... open resumed>) = 4 [pid 5363] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5362] <... futex resumed>) = 0 [pid 5363] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5362] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5363] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5362] <... futex resumed>) = 0 [pid 5363] <... open resumed>) = 5 [pid 5362] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5363] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5362] <... futex resumed>) = 0 [pid 5362] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5362] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5363] <... futex resumed>) = 1 [pid 5362] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5363] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1<) = 0x7f3dc0d35000 [pid 5362] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5362] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5363] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5363] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5362] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5362] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5364 attached => {parent_tid=[5364]}, 88) = 5364 [pid 5364] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5364] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5364] rt_sigprocmask(SIG_SETMASK, [], [pid 5362] rt_sigprocmask(SIG_SETMASK, [], [pid 5364] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5364] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5362] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5362] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5362] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5364] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5364] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5363] <... futex resumed>) = ? [pid 5362] <... futex resumed>) = ? [pid 5364] +++ killed by SIGBUS +++ [pid 5363] +++ killed by SIGBUS +++ [pid 5362] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5362, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./109", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./109", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./109/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./109/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./109/binderfs") = 0 umount2("./109/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 [ 84.710165][ T5363] loop0: detected capacity change from 0 to 2048 [ 84.721266][ T5363] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./109/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./109/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./109/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./109/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./109/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./109") = 0 mkdir("./110", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5365 ./strace-static-x86_64: Process 5365 attached [pid 5365] set_robust_list(0x5555562186a0, 24) = 0 [pid 5365] chdir("./110") = 0 [pid 5365] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5365] setpgid(0, 0) = 0 [pid 5365] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5365] write(3, "1000", 4) = 4 [pid 5365] close(3) = 0 [pid 5365] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5365] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5365] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5365] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5365] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5365] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5365] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5365] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5366 attached => {parent_tid=[5366]}, 88) = 5366 [pid 5365] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5365] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5365] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5366] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5366] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5366] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5366] memfd_create("syzkaller", 0) = 3 [pid 5366] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5366] 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 5366] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5366] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5366] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5366] close(3) = 0 [pid 5366] mkdir("./file0", 0777) = 0 [pid 5366] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5366] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5366] chdir("./file0") = 0 [pid 5366] ioctl(4, LOOP_CLR_FD) = 0 [pid 5366] close(4) = 0 [pid 5366] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5365] <... futex resumed>) = 0 [pid 5366] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5365] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5366] <... futex resumed>) = 0 [pid 5365] <... futex resumed>) = 1 [pid 5366] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5365] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5366] <... open resumed>) = 4 [pid 5366] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5365] <... futex resumed>) = 0 [pid 5365] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5366] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5365] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5366] <... open resumed>) = 5 [pid 5366] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5365] <... futex resumed>) = 0 [pid 5366] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5365] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5365] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5365] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5366] <... mmap resumed>) = 0x20000000 [pid 5366] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5365] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5366] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5365] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5365] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5365] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5367 attached [pid 5367] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5367] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5367] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5367] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5365] <... clone3 resumed> => {parent_tid=[5367]}, 88) = 5367 [pid 5365] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5365] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5367] <... futex resumed>) = 0 [pid 5365] <... futex resumed>) = 1 [pid 5365] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5367] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5366] <... futex resumed>) = ? [pid 5365] <... futex resumed>) = ? [pid 5367] +++ killed by SIGBUS +++ [pid 5366] +++ killed by SIGBUS +++ [pid 5365] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5365, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./110", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./110", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./110/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./110/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./110/binderfs") = 0 [ 84.821257][ T5366] loop0: detected capacity change from 0 to 2048 [ 84.832368][ T5366] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./110/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./110/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./110/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./110/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./110/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./110/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./110") = 0 mkdir("./111", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5368 ./strace-static-x86_64: Process 5368 attached [pid 5368] set_robust_list(0x5555562186a0, 24) = 0 [pid 5368] chdir("./111") = 0 [pid 5368] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5368] setpgid(0, 0) = 0 [pid 5368] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5368] write(3, "1000", 4) = 4 [pid 5368] close(3) = 0 [pid 5368] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5368] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5368] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5368] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5368] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5368] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5368] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5368] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5369 attached => {parent_tid=[5369]}, 88) = 5369 [pid 5368] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5368] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5368] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5369] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5369] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5369] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5369] memfd_create("syzkaller", 0) = 3 [pid 5369] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5369] 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 5369] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5369] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5369] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5369] close(3) = 0 [pid 5369] mkdir("./file0", 0777) = 0 [pid 5369] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5369] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5369] chdir("./file0") = 0 [pid 5369] ioctl(4, LOOP_CLR_FD) = 0 [pid 5369] close(4) = 0 [pid 5369] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5368] <... futex resumed>) = 0 [pid 5369] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5368] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5369] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5368] <... futex resumed>) = 0 [pid 5369] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5368] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5369] <... open resumed>) = 4 [pid 5369] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5368] <... futex resumed>) = 0 [pid 5369] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5368] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5369] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5368] <... futex resumed>) = 0 [pid 5369] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5368] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5369] <... open resumed>) = 5 [pid 5369] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5368] <... futex resumed>) = 0 [pid 5369] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5368] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5369] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5368] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5369] <... mmap resumed>) = 0x20000000 [pid 5368] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5368] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5369] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5368] <... mprotect resumed>) = 0 [pid 5369] <... futex resumed>) = 0 [pid 5368] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5369] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5368] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5368] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5370 attached => {parent_tid=[5370]}, 88) = 5370 [pid 5370] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5370] set_robust_list(0x7f3dc0d559a0, 24 [pid 5368] rt_sigprocmask(SIG_SETMASK, [], [pid 5370] <... set_robust_list resumed>) = 0 [pid 5370] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5370] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5368] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5368] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5370] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5368] <... futex resumed>) = 0 [pid 5368] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5370] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5368] <... futex resumed>) = ? [pid 5369] <... futex resumed>) = ? [pid 5370] +++ killed by SIGBUS +++ [pid 5369] +++ killed by SIGBUS +++ [pid 5368] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5368, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./111", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./111", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./111/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./111/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [ 84.950845][ T5369] loop0: detected capacity change from 0 to 2048 [ 84.962423][ T5369] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) unlink("./111/binderfs") = 0 umount2("./111/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./111/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./111/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./111/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./111/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./111/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./111") = 0 mkdir("./112", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5371 attached , child_tidptr=0x555556218690) = 5371 [pid 5371] set_robust_list(0x5555562186a0, 24) = 0 [pid 5371] chdir("./112") = 0 [pid 5371] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5371] setpgid(0, 0) = 0 [pid 5371] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5371] write(3, "1000", 4) = 4 [pid 5371] close(3) = 0 [pid 5371] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5371] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5371] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5371] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5371] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5371] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5371] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5371] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5372 attached => {parent_tid=[5372]}, 88) = 5372 [pid 5371] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5371] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5371] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5372] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5372] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5372] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5372] memfd_create("syzkaller", 0) = 3 [pid 5372] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5372] 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 5372] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5372] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5372] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5372] close(3) = 0 [pid 5372] mkdir("./file0", 0777) = 0 [pid 5372] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5372] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5372] chdir("./file0") = 0 [pid 5372] ioctl(4, LOOP_CLR_FD) = 0 [pid 5372] close(4) = 0 [pid 5372] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5371] <... futex resumed>) = 0 [pid 5371] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5371] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5372] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5372] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5371] <... futex resumed>) = 0 [pid 5371] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5372] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5371] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5372] <... open resumed>) = 5 [pid 5372] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5371] <... futex resumed>) = 0 [pid 5372] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5371] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5372] <... futex resumed>) = 0 [pid 5371] <... futex resumed>) = 1 [pid 5372] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5371] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5371] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5372] <... mmap resumed>) = 0x20000000 [pid 5372] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5371] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5372] <... futex resumed>) = 0 [pid 5372] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5371] <... mprotect resumed>) = 0 [pid 5371] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5371] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5373 attached [pid 5373] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5373] set_robust_list(0x7f3dc0d559a0, 24 [pid 5371] <... clone3 resumed> => {parent_tid=[5373]}, 88) = 5373 [pid 5373] <... set_robust_list resumed>) = 0 [pid 5373] rt_sigprocmask(SIG_SETMASK, [], [pid 5371] rt_sigprocmask(SIG_SETMASK, [], [pid 5373] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5371] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5373] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5371] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5373] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5371] <... futex resumed>) = 0 [pid 5373] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5371] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5372] <... futex resumed>) = ? [pid 5371] <... futex resumed>) = ? [pid 5372] +++ killed by SIGBUS +++ [pid 5373] +++ killed by SIGBUS +++ [pid 5371] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5371, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./112", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./112", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./112/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./112/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./112/binderfs") = 0 [ 85.079044][ T5372] loop0: detected capacity change from 0 to 2048 [ 85.090941][ T5372] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./112/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./112/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./112/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./112/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./112/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./112/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./112") = 0 mkdir("./113", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5374 attached , child_tidptr=0x555556218690) = 5374 [pid 5374] set_robust_list(0x5555562186a0, 24) = 0 [pid 5374] chdir("./113") = 0 [pid 5374] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5374] setpgid(0, 0) = 0 [pid 5374] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5374] write(3, "1000", 4) = 4 [pid 5374] close(3) = 0 [pid 5374] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5374] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5374] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5374] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5374] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5374] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5374] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5374] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5375 attached => {parent_tid=[5375]}, 88) = 5375 [pid 5374] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5374] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5374] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5375] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5375] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5375] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5375] memfd_create("syzkaller", 0) = 3 [pid 5375] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5375] 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 5375] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5375] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5375] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5375] close(3) = 0 [pid 5375] mkdir("./file0", 0777) = 0 [pid 5375] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5375] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5375] chdir("./file0") = 0 [pid 5375] ioctl(4, LOOP_CLR_FD) = 0 [pid 5375] close(4) = 0 [pid 5375] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5374] <... futex resumed>) = 0 [pid 5374] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5374] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5375] <... futex resumed>) = 1 [pid 5375] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5375] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5375] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5374] <... futex resumed>) = 0 [pid 5374] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5375] <... futex resumed>) = 0 [pid 5375] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5375] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5375] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5374] <... futex resumed>) = 1 [pid 5374] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5374] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5375] <... futex resumed>) = 0 [pid 5375] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1<) = 1 [pid 5374] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5374] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5375] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5374] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5375] <... futex resumed>) = 0 [pid 5375] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5374] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5374] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5374] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5376]}, 88) = 5376 [pid 5374] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5374] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5374] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5376 attached [pid 5376] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5376] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5376] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5376] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5375] <... futex resumed>) = ? [pid 5374] <... futex resumed>) = ? [pid 5376] +++ killed by SIGBUS +++ [pid 5375] +++ killed by SIGBUS +++ [pid 5374] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5374, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./113", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./113", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./113/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./113/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./113/binderfs") = 0 [ 85.195803][ T5375] loop0: detected capacity change from 0 to 2048 [ 85.208369][ T5375] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./113/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./113/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./113/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./113/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./113/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./113/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./113") = 0 mkdir("./114", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5377 attached [pid 5377] set_robust_list(0x5555562186a0, 24) = 0 [pid 5041] <... clone resumed>, child_tidptr=0x555556218690) = 5377 [pid 5377] chdir("./114") = 0 [pid 5377] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5377] setpgid(0, 0) = 0 [pid 5377] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5377] write(3, "1000", 4) = 4 [pid 5377] close(3) = 0 [pid 5377] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5377] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5377] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5377] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5377] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5377] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5377] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5377] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5378 attached [pid 5378] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5377] <... clone3 resumed> => {parent_tid=[5378]}, 88) = 5378 [pid 5378] <... rseq resumed>) = 0 [pid 5377] rt_sigprocmask(SIG_SETMASK, [], [pid 5378] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5378] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5378] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5377] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5377] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5378] <... futex resumed>) = 0 [pid 5378] memfd_create("syzkaller", 0) = 3 [pid 5378] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5377] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5378] 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 5378] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5378] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5378] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5378] close(3) = 0 [pid 5378] mkdir("./file0", 0777) = 0 [pid 5378] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5378] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5378] chdir("./file0") = 0 [pid 5378] ioctl(4, LOOP_CLR_FD) = 0 [pid 5378] close(4) = 0 [pid 5378] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5377] <... futex resumed>) = 0 [pid 5378] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5377] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5378] <... futex resumed>) = 0 [pid 5378] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5377] <... futex resumed>) = 1 [pid 5377] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5378] <... open resumed>) = 4 [pid 5378] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5377] <... futex resumed>) = 0 [pid 5377] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5378] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5377] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5378] <... open resumed>) = 5 [pid 5378] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5377] <... futex resumed>) = 0 [pid 5377] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5378] <... futex resumed>) = 1 [pid 5377] <... futex resumed>) = 0 [pid 5378] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5377] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5378] <... mmap resumed>) = 0x20000000 [pid 5377] <... futex resumed>) = 0 [pid 5377] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5377] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5378] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5378] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5377] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5377] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5379]}, 88) = 5379 [pid 5377] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 ./strace-static-x86_64: Process 5379 attached [pid 5379] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5377] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5379] <... rseq resumed>) = 0 [pid 5379] set_robust_list(0x7f3dc0d559a0, 24 [pid 5377] <... futex resumed>) = 0 [pid 5379] <... set_robust_list resumed>) = 0 [pid 5379] rt_sigprocmask(SIG_SETMASK, [], [pid 5377] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5379] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5379] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5377] <... futex resumed>) = ? [pid 5378] <... futex resumed>) = ? [pid 5379] +++ killed by SIGBUS +++ [pid 5378] +++ killed by SIGBUS +++ [pid 5377] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5377, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./114", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./114", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./114/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./114/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./114/binderfs") = 0 umount2("./114/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./114/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./114/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./114/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./114/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 [ 85.312099][ T5378] loop0: detected capacity change from 0 to 2048 [ 85.322714][ T5378] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./114/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./114") = 0 mkdir("./115", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5380 ./strace-static-x86_64: Process 5380 attached [pid 5380] set_robust_list(0x5555562186a0, 24) = 0 [pid 5380] chdir("./115") = 0 [pid 5380] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5380] setpgid(0, 0) = 0 [pid 5380] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5380] write(3, "1000", 4) = 4 [pid 5380] close(3) = 0 [pid 5380] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5380] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5380] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5380] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5380] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5380] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5380] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5380] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5381 attached => {parent_tid=[5381]}, 88) = 5381 [pid 5381] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5380] rt_sigprocmask(SIG_SETMASK, [], [pid 5381] <... rseq resumed>) = 0 [pid 5380] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5381] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5380] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5381] rt_sigprocmask(SIG_SETMASK, [], [pid 5380] <... futex resumed>) = 0 [pid 5381] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5380] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5381] memfd_create("syzkaller", 0) = 3 [pid 5381] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5381] 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 5381] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5381] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5381] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5381] close(3) = 0 [pid 5381] mkdir("./file0", 0777) = 0 [pid 5381] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5381] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5381] chdir("./file0") = 0 [pid 5381] ioctl(4, LOOP_CLR_FD) = 0 [pid 5381] close(4) = 0 [pid 5381] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5380] <... futex resumed>) = 0 [pid 5381] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5380] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5381] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5380] <... futex resumed>) = 0 [pid 5381] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5380] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5381] <... open resumed>) = 4 [pid 5381] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5380] <... futex resumed>) = 0 [pid 5381] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5380] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5381] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5380] <... futex resumed>) = 0 [pid 5381] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5380] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5381] <... open resumed>) = 5 [pid 5381] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5381] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5380] <... futex resumed>) = 0 [pid 5380] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5381] <... futex resumed>) = 0 [pid 5381] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5380] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5381] <... mmap resumed>) = 0x20000000 [pid 5380] <... futex resumed>) = 0 [pid 5381] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5380] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5381] <... futex resumed>) = 0 [pid 5380] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5381] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5380] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5380] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5380] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5382 attached => {parent_tid=[5382]}, 88) = 5382 [pid 5380] rt_sigprocmask(SIG_SETMASK, [], [pid 5382] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5382] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5382] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5382] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5380] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5380] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5382] <... futex resumed>) = 0 [pid 5382] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5381] <... futex resumed>) = ? [pid 5382] +++ killed by SIGBUS +++ [pid 5381] +++ killed by SIGBUS +++ [pid 5380] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5380, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./115", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 85.411320][ T5381] loop0: detected capacity change from 0 to 2048 [ 85.422699][ T5381] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./115", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./115/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./115/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./115/binderfs") = 0 umount2("./115/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./115/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./115/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./115/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./115/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./115/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./115") = 0 mkdir("./116", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5383 ./strace-static-x86_64: Process 5383 attached [pid 5383] set_robust_list(0x5555562186a0, 24) = 0 [pid 5383] chdir("./116") = 0 [pid 5383] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5383] setpgid(0, 0) = 0 [pid 5383] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5383] write(3, "1000", 4) = 4 [pid 5383] close(3) = 0 [pid 5383] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5383] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5383] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5383] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5383] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5383] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5383] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5383] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5384]}, 88) = 5384 ./strace-static-x86_64: Process 5384 attached [pid 5383] rt_sigprocmask(SIG_SETMASK, [], [pid 5384] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5383] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5384] <... rseq resumed>) = 0 [pid 5383] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5384] set_robust_list(0x7f3dc90769a0, 24 [pid 5383] <... futex resumed>) = 0 [pid 5383] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5384] <... set_robust_list resumed>) = 0 [pid 5384] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5384] memfd_create("syzkaller", 0) = 3 [pid 5384] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5384] 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 5384] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5384] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5384] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5384] close(3) = 0 [pid 5384] mkdir("./file0", 0777) = 0 [pid 5384] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5384] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5384] chdir("./file0") = 0 [pid 5384] ioctl(4, LOOP_CLR_FD) = 0 [pid 5384] close(4) = 0 [pid 5384] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5383] <... futex resumed>) = 0 [pid 5383] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5383] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5384] <... futex resumed>) = 1 [pid 5384] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5384] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5383] <... futex resumed>) = 0 [pid 5383] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5383] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5384] <... futex resumed>) = 1 [pid 5384] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5384] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5383] <... futex resumed>) = 0 [pid 5384] <... futex resumed>) = 1 [pid 5383] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5384] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5383] <... futex resumed>) = 0 [pid 5384] <... mmap resumed>) = 0x20000000 [pid 5383] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5383] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5383] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5384] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5384] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5383] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5383] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5385 attached => {parent_tid=[5385]}, 88) = 5385 [pid 5385] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5383] rt_sigprocmask(SIG_SETMASK, [], [pid 5385] <... rseq resumed>) = 0 [pid 5383] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5385] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5383] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5385] rt_sigprocmask(SIG_SETMASK, [], [pid 5383] <... futex resumed>) = 0 [pid 5385] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5383] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5385] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5383] <... futex resumed>) = ? [pid 5384] <... futex resumed>) = ? [pid 5384] +++ killed by SIGBUS +++ [pid 5385] +++ killed by SIGBUS +++ [pid 5383] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5383, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- umount2("./116", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./116", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./116/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./116/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./116/binderfs") = 0 umount2("./116/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./116/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./116/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./116/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./116/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./116/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./116") = 0 mkdir("./117", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5386 attached , child_tidptr=0x555556218690) = 5386 [pid 5386] set_robust_list(0x5555562186a0, 24) = 0 [pid 5386] chdir("./117") = 0 [pid 5386] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5386] setpgid(0, 0) = 0 [pid 5386] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5386] write(3, "1000", 4) = 4 [pid 5386] close(3) = 0 [pid 5386] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5386] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5386] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5386] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5386] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5386] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5386] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5386] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5387 attached => {parent_tid=[5387]}, 88) = 5387 [pid 5387] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5387] set_robust_list(0x7f3dc90769a0, 24 [pid 5386] rt_sigprocmask(SIG_SETMASK, [], [pid 5387] <... set_robust_list resumed>) = 0 [pid 5386] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5387] rt_sigprocmask(SIG_SETMASK, [], [pid 5386] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5387] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5386] <... futex resumed>) = 0 [pid 5386] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5387] memfd_create("syzkaller", 0) = 3 [pid 5387] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [ 85.536319][ T5384] loop0: detected capacity change from 0 to 2048 [ 85.549204][ T5384] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) [pid 5387] 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 5387] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5387] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5387] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5387] close(3) = 0 [pid 5387] mkdir("./file0", 0777) = 0 [pid 5387] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5387] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5387] chdir("./file0") = 0 [pid 5387] ioctl(4, LOOP_CLR_FD) = 0 [pid 5387] close(4) = 0 [pid 5387] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5387] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5386] <... futex resumed>) = 0 [pid 5386] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5387] <... futex resumed>) = 0 [pid 5387] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5386] <... futex resumed>) = 1 [pid 5386] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5387] <... open resumed>) = 4 [pid 5387] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5386] <... futex resumed>) = 0 [pid 5387] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5386] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5387] <... open resumed>) = 5 [pid 5386] <... futex resumed>) = 0 [pid 5386] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5387] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5386] <... futex resumed>) = 0 [pid 5386] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5386] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5386] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5386] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5387] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5386] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5387] <... mmap resumed>) = 0x20000000 [pid 5386] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5386] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5388]}, 88) = 5388 [pid 5386] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5386] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5386] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5387] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5387] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 5388 attached [pid 5388] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5388] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5388] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5388] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5387] <... futex resumed>) = ? [pid 5386] <... futex resumed>) = ? [pid 5388] +++ killed by SIGBUS +++ [pid 5387] +++ killed by SIGBUS +++ [pid 5386] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5386, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=5 /* 0.05 s */} --- umount2("./117", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./117", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./117/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./117/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./117/binderfs") = 0 [ 85.612129][ T5387] loop0: detected capacity change from 0 to 2048 [ 85.627857][ T5387] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./117/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./117/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./117/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./117/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./117/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./117/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./117") = 0 mkdir("./118", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5389 ./strace-static-x86_64: Process 5389 attached [pid 5389] set_robust_list(0x5555562186a0, 24) = 0 [pid 5389] chdir("./118") = 0 [pid 5389] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5389] setpgid(0, 0) = 0 [pid 5389] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5389] write(3, "1000", 4) = 4 [pid 5389] close(3) = 0 [pid 5389] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5389] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5389] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5389] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5389] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5389] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5389] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5389] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5390]}, 88) = 5390 [pid 5389] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5389] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5389] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5390 attached [pid 5390] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5390] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5390] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5390] memfd_create("syzkaller", 0) = 3 [pid 5390] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5390] 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 5390] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5390] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5390] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5390] close(3) = 0 [pid 5390] mkdir("./file0", 0777) = 0 [pid 5390] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5390] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5390] chdir("./file0") = 0 [pid 5390] ioctl(4, LOOP_CLR_FD) = 0 [pid 5390] close(4) = 0 [pid 5390] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5390] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5389] <... futex resumed>) = 0 [pid 5389] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5389] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5390] <... futex resumed>) = 0 [pid 5390] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5390] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5389] <... futex resumed>) = 0 [pid 5390] <... futex resumed>) = 1 [pid 5390] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5389] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5390] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5389] <... futex resumed>) = 0 [pid 5390] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5389] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5390] <... open resumed>) = 5 [pid 5390] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5389] <... futex resumed>) = 0 [pid 5389] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5389] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5389] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5390] <... futex resumed>) = 1 [pid 5389] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5390] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5389] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5390] <... mmap resumed>) = 0x20000000 [pid 5389] <... mprotect resumed>) = 0 [pid 5389] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5390] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5390] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5389] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5389] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5391]}, 88) = 5391 [pid 5389] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5389] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 5391 attached ) = 0 [pid 5391] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5389] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5391] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5391] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5391] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5390] <... futex resumed>) = ? [pid 5389] <... futex resumed>) = ? [pid 5391] +++ killed by SIGBUS +++ [pid 5390] +++ killed by SIGBUS +++ [pid 5389] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5389, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./118", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./118", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./118/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./118/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./118/binderfs") = 0 [ 85.726913][ T5390] loop0: detected capacity change from 0 to 2048 [ 85.737605][ T5390] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./118/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./118/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./118/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./118/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./118/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./118/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./118") = 0 mkdir("./119", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5392 attached , child_tidptr=0x555556218690) = 5392 [pid 5392] set_robust_list(0x5555562186a0, 24) = 0 [pid 5392] chdir("./119") = 0 [pid 5392] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5392] setpgid(0, 0) = 0 [pid 5392] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5392] write(3, "1000", 4) = 4 [pid 5392] close(3) = 0 [pid 5392] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5392] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5392] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5392] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5392] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5392] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5392] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5392] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5393]}, 88) = 5393 [pid 5392] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5392] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5392] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5393 attached [pid 5393] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5393] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5393] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5393] memfd_create("syzkaller", 0) = 3 [pid 5393] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5393] 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 5393] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5393] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5393] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5393] close(3) = 0 [pid 5393] mkdir("./file0", 0777) = 0 [pid 5393] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5393] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5393] chdir("./file0") = 0 [pid 5393] ioctl(4, LOOP_CLR_FD) = 0 [pid 5393] close(4) = 0 [pid 5393] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5392] <... futex resumed>) = 0 [pid 5392] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5392] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5393] <... futex resumed>) = 1 [pid 5393] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5393] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5392] <... futex resumed>) = 0 [pid 5392] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5392] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5393] <... futex resumed>) = 1 [pid 5393] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5393] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5392] <... futex resumed>) = 0 [pid 5392] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5392] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5392] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5393] <... futex resumed>) = 1 [pid 5392] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5393] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5392] <... mprotect resumed>) = 0 [pid 5392] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5393] <... mmap resumed>) = 0x20000000 [pid 5392] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5393] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5393] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 5394 attached [pid 5394] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5392] <... clone3 resumed> => {parent_tid=[5394]}, 88) = 5394 [pid 5394] <... rseq resumed>) = 0 [pid 5392] rt_sigprocmask(SIG_SETMASK, [], [pid 5394] set_robust_list(0x7f3dc0d559a0, 24 [pid 5392] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5394] <... set_robust_list resumed>) = 0 [pid 5392] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5394] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5392] <... futex resumed>) = 0 [pid 5392] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5394] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5393] <... futex resumed>) = ? [pid 5393] +++ killed by SIGBUS +++ [pid 5392] <... futex resumed>) = ? [pid 5394] +++ killed by SIGBUS +++ [pid 5392] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5392, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=3 /* 0.03 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./119", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./119", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./119/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./119/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./119/binderfs") = 0 [ 85.842356][ T5393] loop0: detected capacity change from 0 to 2048 [ 85.852936][ T5393] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./119/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./119/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./119/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./119/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./119/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./119/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./119") = 0 mkdir("./120", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5395 ./strace-static-x86_64: Process 5395 attached [pid 5395] set_robust_list(0x5555562186a0, 24) = 0 [pid 5395] chdir("./120") = 0 [pid 5395] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5395] setpgid(0, 0) = 0 [pid 5395] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5395] write(3, "1000", 4) = 4 [pid 5395] close(3) = 0 [pid 5395] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5395] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5395] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5395] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5395] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5395] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5395] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5395] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5396]}, 88) = 5396 [pid 5395] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5395] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5395] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5396 attached [pid 5396] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5396] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5396] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5396] memfd_create("syzkaller", 0) = 3 [pid 5396] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5396] 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 5396] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5396] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5396] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5396] close(3) = 0 [pid 5396] mkdir("./file0", 0777) = 0 [pid 5396] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5396] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5396] chdir("./file0") = 0 [pid 5396] ioctl(4, LOOP_CLR_FD) = 0 [pid 5396] close(4) = 0 [pid 5396] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5395] <... futex resumed>) = 0 [pid 5396] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5395] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5396] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5395] <... futex resumed>) = 0 [pid 5396] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5395] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5396] <... open resumed>) = 4 [pid 5396] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5395] <... futex resumed>) = 0 [pid 5396] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5395] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5396] <... futex resumed>) = 0 [pid 5395] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5396] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000) = 5 [pid 5396] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5395] <... futex resumed>) = 0 [pid 5396] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5395] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5396] <... futex resumed>) = 0 [pid 5395] <... futex resumed>) = 1 [pid 5396] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5395] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5395] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5395] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5396] <... mmap resumed>) = 0x20000000 [pid 5396] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5396] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5395] <... mprotect resumed>) = 0 [pid 5395] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5395] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5397]}, 88) = 5397 [pid 5395] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5395] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5395] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5397 attached [pid 5397] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5397] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5397] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5397] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5396] <... futex resumed>) = ? [pid 5396] +++ killed by SIGBUS +++ [pid 5395] <... futex resumed>) = ? [pid 5397] +++ killed by SIGBUS +++ [pid 5395] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5395, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./120", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./120", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./120/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./120/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./120/binderfs") = 0 [ 85.955305][ T5396] loop0: detected capacity change from 0 to 2048 [ 85.966301][ T5396] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./120/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./120/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./120/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./120/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./120/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./120/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./120") = 0 mkdir("./121", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5398 attached , child_tidptr=0x555556218690) = 5398 [pid 5398] set_robust_list(0x5555562186a0, 24) = 0 [pid 5398] chdir("./121") = 0 [pid 5398] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5398] setpgid(0, 0) = 0 [pid 5398] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5398] write(3, "1000", 4) = 4 [pid 5398] close(3) = 0 [pid 5398] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5398] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5398] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5398] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5398] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5398] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5398] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5398] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5399 attached [pid 5399] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053 [pid 5398] <... clone3 resumed> => {parent_tid=[5399]}, 88) = 5399 [pid 5399] <... rseq resumed>) = 0 [pid 5398] rt_sigprocmask(SIG_SETMASK, [], [pid 5399] set_robust_list(0x7f3dc90769a0, 24 [pid 5398] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5399] <... set_robust_list resumed>) = 0 [pid 5398] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5399] rt_sigprocmask(SIG_SETMASK, [], [pid 5398] <... futex resumed>) = 0 [pid 5399] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5398] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5399] memfd_create("syzkaller", 0) = 3 [pid 5399] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5399] 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 5399] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5399] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5399] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5399] close(3) = 0 [pid 5399] mkdir("./file0", 0777) = 0 [pid 5399] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5399] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5399] chdir("./file0") = 0 [pid 5399] ioctl(4, LOOP_CLR_FD) = 0 [pid 5399] close(4) = 0 [pid 5399] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5399] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5398] <... futex resumed>) = 0 [pid 5398] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5399] <... futex resumed>) = 0 [pid 5398] <... futex resumed>) = 1 [pid 5399] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5398] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5399] <... open resumed>) = 4 [pid 5399] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5398] <... futex resumed>) = 0 [pid 5399] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5398] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5399] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5399] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5398] <... futex resumed>) = 0 [pid 5399] <... open resumed>) = 5 [pid 5399] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5399] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5398] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable) [pid 5398] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5399] <... futex resumed>) = 0 [pid 5398] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5399] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1<) = 0 [pid 5398] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 [pid 5399] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5398] <... mmap resumed>) = 0x7f3dc0d35000 [pid 5399] <... futex resumed>) = 0 [pid 5399] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5398] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5398] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5398] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5400 attached => {parent_tid=[5400]}, 88) = 5400 [pid 5400] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5400] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5400] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5400] futex(0x7f3dc91426d8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5398] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5398] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5400] <... futex resumed>) = 0 [pid 5398] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5400] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5398] <... futex resumed>) = ? [pid 5399] <... futex resumed>) = ? [pid 5399] +++ killed by SIGBUS +++ [pid 5400] +++ killed by SIGBUS +++ [pid 5398] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5398, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./121", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./121", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./121/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./121/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./121/binderfs") = 0 [ 86.071157][ T5399] loop0: detected capacity change from 0 to 2048 [ 86.082047][ T5399] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./121/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./121/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./121/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./121/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./121/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./121/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./121") = 0 mkdir("./122", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5401 attached , child_tidptr=0x555556218690) = 5401 [pid 5401] set_robust_list(0x5555562186a0, 24) = 0 [pid 5401] chdir("./122") = 0 [pid 5401] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5401] setpgid(0, 0) = 0 [pid 5401] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5401] write(3, "1000", 4) = 4 [pid 5401] close(3) = 0 [pid 5401] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5401] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5401] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5401] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5401] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5401] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5401] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5401] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5402]}, 88) = 5402 [pid 5401] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5401] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5401] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5402 attached [pid 5402] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5402] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5402] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5402] memfd_create("syzkaller", 0) = 3 [pid 5402] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5402] 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 5402] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5402] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5402] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5402] close(3) = 0 [pid 5402] mkdir("./file0", 0777) = 0 [pid 5402] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5402] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5402] chdir("./file0") = 0 [pid 5402] ioctl(4, LOOP_CLR_FD) = 0 [pid 5402] close(4) = 0 [pid 5402] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5402] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5401] <... futex resumed>) = 0 [pid 5401] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5401] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5402] <... futex resumed>) = 0 [pid 5402] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5402] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5402] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5401] <... futex resumed>) = 0 [pid 5401] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5402] <... futex resumed>) = 0 [pid 5401] <... futex resumed>) = 1 [pid 5402] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5401] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5402] <... open resumed>) = 5 [pid 5402] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5402] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5401] <... futex resumed>) = 0 [pid 5401] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5401] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5402] <... futex resumed>) = 0 [pid 5402] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5401] <... futex resumed>) = 0 [pid 5401] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5401] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5401] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5401] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} => {parent_tid=[5403]}, 88) = 5403 ./strace-static-x86_64: Process 5403 attached [pid 5403] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5401] rt_sigprocmask(SIG_SETMASK, [], [pid 5403] <... rseq resumed>) = 0 [pid 5401] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5403] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5403] rt_sigprocmask(SIG_SETMASK, [], [pid 5401] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5401] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5403] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5403] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5402] <... futex resumed>) = ? [pid 5402] +++ killed by SIGBUS +++ [pid 5401] <... futex resumed>) = ? [pid 5403] +++ killed by SIGBUS +++ [pid 5401] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5401, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- umount2("./122", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./122", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./122/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./122/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./122/binderfs") = 0 [ 86.188255][ T5402] loop0: detected capacity change from 0 to 2048 [ 86.200955][ T5402] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./122/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./122/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./122/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./122/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./122/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./122/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./122") = 0 mkdir("./123", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5404 attached , child_tidptr=0x555556218690) = 5404 [pid 5404] set_robust_list(0x5555562186a0, 24) = 0 [pid 5404] chdir("./123") = 0 [pid 5404] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5404] setpgid(0, 0) = 0 [pid 5404] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5404] write(3, "1000", 4) = 4 [pid 5404] close(3) = 0 [pid 5404] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5404] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5404] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5404] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5404] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5404] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5404] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5404] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5405 attached => {parent_tid=[5405]}, 88) = 5405 [pid 5405] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5405] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5405] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5405] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5404] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5404] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5405] <... futex resumed>) = 0 [pid 5404] <... futex resumed>) = 1 [pid 5405] memfd_create("syzkaller", 0 [pid 5404] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5405] <... memfd_create resumed>) = 3 [pid 5405] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5405] 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 5405] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5405] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5405] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5405] close(3) = 0 [pid 5405] mkdir("./file0", 0777) = 0 [pid 5405] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5405] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5405] chdir("./file0") = 0 [pid 5405] ioctl(4, LOOP_CLR_FD) = 0 [pid 5405] close(4) = 0 [pid 5405] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5405] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5404] <... futex resumed>) = 0 [pid 5405] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5404] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5405] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5404] <... futex resumed>) = 0 [pid 5404] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5405] <... open resumed>) = 4 [pid 5405] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5405] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5404] <... futex resumed>) = 0 [pid 5405] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5404] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5405] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5404] <... futex resumed>) = 0 [pid 5404] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5405] <... open resumed>) = 5 [pid 5405] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5404] <... futex resumed>) = 0 [pid 5404] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5405] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5404] <... futex resumed>) = 0 [pid 5404] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5405] <... mmap resumed>) = 0x20000000 [pid 5405] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5405] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5404] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5404] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5404] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5404] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5406 attached => {parent_tid=[5406]}, 88) = 5406 [pid 5406] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5404] rt_sigprocmask(SIG_SETMASK, [], [pid 5406] <... rseq resumed>) = 0 [pid 5404] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5406] set_robust_list(0x7f3dc0d559a0, 24 [pid 5404] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5406] <... set_robust_list resumed>) = 0 [pid 5404] <... futex resumed>) = 0 [pid 5406] rt_sigprocmask(SIG_SETMASK, [], [pid 5404] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5406] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5406] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5405] <... futex resumed>) = ? [pid 5404] <... futex resumed>) = ? [pid 5405] +++ killed by SIGBUS +++ [pid 5406] +++ killed by SIGBUS +++ [pid 5404] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5404, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=1 /* 0.01 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 umount2("./123", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./123", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./123/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./123/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./123/binderfs") = 0 umount2("./123/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./123/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./123/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./123/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [ 86.318772][ T5405] loop0: detected capacity change from 0 to 2048 [ 86.330260][ T5405] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) openat(AT_FDCWD, "./123/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./123/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./123") = 0 mkdir("./124", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5407 ./strace-static-x86_64: Process 5407 attached [pid 5407] set_robust_list(0x5555562186a0, 24) = 0 [pid 5407] chdir("./124") = 0 [pid 5407] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5407] setpgid(0, 0) = 0 [pid 5407] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5407] write(3, "1000", 4) = 4 [pid 5407] close(3) = 0 [pid 5407] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5407] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5407] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5407] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5407] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5407] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5407] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5407] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0}./strace-static-x86_64: Process 5408 attached [pid 5408] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5408] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5407] <... clone3 resumed> => {parent_tid=[5408]}, 88) = 5408 [pid 5408] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5407] rt_sigprocmask(SIG_SETMASK, [], [pid 5408] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5407] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5407] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5407] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5408] <... futex resumed>) = 0 [pid 5408] memfd_create("syzkaller", 0) = 3 [pid 5408] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5408] 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 5408] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5408] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5408] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5408] close(3) = 0 [pid 5408] mkdir("./file0", 0777) = 0 [pid 5408] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5408] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5408] chdir("./file0") = 0 [pid 5408] ioctl(4, LOOP_CLR_FD) = 0 [pid 5408] close(4) = 0 [pid 5408] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5407] <... futex resumed>) = 0 [pid 5407] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5407] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5408] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5408] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5407] <... futex resumed>) = 0 [pid 5408] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5407] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5408] <... futex resumed>) = 0 [pid 5407] <... futex resumed>) = 1 [pid 5408] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5407] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5408] <... open resumed>) = 5 [pid 5408] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5407] <... futex resumed>) = 0 [pid 5408] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5407] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5407] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5407] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5407] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE [pid 5408] <... mmap resumed>) = 0x20000000 [pid 5407] <... mprotect resumed>) = 0 [pid 5408] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5408] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5407] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5407] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0}./strace-static-x86_64: Process 5409 attached [pid 5409] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053 [pid 5407] <... clone3 resumed> => {parent_tid=[5409]}, 88) = 5409 [pid 5409] <... rseq resumed>) = 0 [pid 5407] rt_sigprocmask(SIG_SETMASK, [], [pid 5409] set_robust_list(0x7f3dc0d559a0, 24 [pid 5407] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5409] <... set_robust_list resumed>) = 0 [pid 5409] rt_sigprocmask(SIG_SETMASK, [], [pid 5407] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5409] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5407] <... futex resumed>) = 0 [pid 5409] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5407] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5408] <... futex resumed>) = ? [pid 5407] <... futex resumed>) = ? [pid 5408] +++ killed by SIGBUS +++ [pid 5409] +++ killed by SIGBUS +++ [pid 5407] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5407, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=1 /* 0.01 s */} --- umount2("./124", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./124", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./124/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./124/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./124/binderfs") = 0 [ 86.424367][ T5408] loop0: detected capacity change from 0 to 2048 [ 86.435965][ T5408] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./124/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./124/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./124/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./124/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./124/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./124/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./124") = 0 mkdir("./125", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556218690) = 5410 ./strace-static-x86_64: Process 5410 attached [pid 5410] set_robust_list(0x5555562186a0, 24) = 0 [pid 5410] chdir("./125") = 0 [pid 5410] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5410] setpgid(0, 0) = 0 [pid 5410] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5410] write(3, "1000", 4) = 4 [pid 5410] close(3) = 0 [pid 5410] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5410] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5410] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5410] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5410] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5410] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5410] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5410] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=0x20300, tls=0x7f3dc90766c0} => {parent_tid=[5411]}, 88) = 5411 [pid 5410] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5410] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5410] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 5411 attached [pid 5411] rseq(0x7f3dc9076fe0, 0x20, 0, 0x53053053) = 0 [pid 5411] set_robust_list(0x7f3dc90769a0, 24) = 0 [pid 5411] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5411] memfd_create("syzkaller", 0) = 3 [pid 5411] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3dc0c56000 [pid 5411] 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 5411] munmap(0x7f3dc0c56000, 1048576) = 0 [pid 5411] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5411] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5411] close(3) = 0 [pid 5411] mkdir("./file0", 0777) = 0 [pid 5411] mount("/dev/loop0", "./file0", "udf", MS_NODEV|MS_SYNCHRONOUS, "") = 0 [pid 5411] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5411] chdir("./file0") = 0 [pid 5411] ioctl(4, LOOP_CLR_FD) = 0 [pid 5411] close(4) = 0 [pid 5411] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5411] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5410] <... futex resumed>) = 0 [pid 5410] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5410] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5411] <... futex resumed>) = 0 [pid 5411] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_SYNC|O_LARGEFILE|O_NOATIME|0x3c, 000) = 4 [pid 5411] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5410] <... futex resumed>) = 0 [pid 5411] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5410] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5411] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5410] <... futex resumed>) = 0 [pid 5411] open("./bus", O_RDWR|O_CREAT|O_TRUNC|O_SYNC|O_DIRECT|O_LARGEFILE|O_NOATIME|0x3c, 000 [pid 5410] futex(0x7f3dc91426cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5411] <... open resumed>) = 5 [pid 5411] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5410] <... futex resumed>) = 0 [pid 5411] mmap(0x20000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_LOCKED|1< [pid 5410] futex(0x7f3dc91426c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5411] <... mmap resumed>) = 0x20000000 [pid 5410] <... futex resumed>) = 0 [pid 5410] futex(0x7f3dc91426dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5410] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc0d35000 [pid 5410] mprotect(0x7f3dc0d36000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5410] rt_sigprocmask(SIG_BLOCK, ~[], [pid 5411] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000 [pid 5410] <... rt_sigprocmask resumed>[], 8) = 0 [pid 5411] <... futex resumed>) = 0 [pid 5410] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc0d55990, parent_tid=0x7f3dc0d55990, exit_signal=0, stack=0x7f3dc0d35000, stack_size=0x20300, tls=0x7f3dc0d556c0} [pid 5411] futex(0x7f3dc91426c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5410] <... clone3 resumed> => {parent_tid=[5412]}, 88) = 5412 [pid 5410] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5410] futex(0x7f3dc91426d8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5410] futex(0x7f3dc91426dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 5412 attached [pid 5412] rseq(0x7f3dc0d55fe0, 0x20, 0, 0x53053053) = 0 [pid 5412] set_robust_list(0x7f3dc0d559a0, 24) = 0 [pid 5412] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5412] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x20000084} --- [pid 5411] <... futex resumed>) = ? [pid 5410] <... futex resumed>) = ? [pid 5411] +++ killed by SIGBUS +++ [pid 5412] +++ killed by SIGBUS +++ [pid 5410] +++ killed by SIGBUS +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5410, si_uid=0, si_status=SIGBUS, si_utime=0, si_stime=2 /* 0.02 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 [ 86.530252][ T5411] loop0: detected capacity change from 0 to 2048 [ 86.541829][ T5411] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) umount2("./125", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./125", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x555556219730 /* 4 entries */, 32768) = 112 umount2("./125/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./125/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 unlink("./125/binderfs") = 0 umount2("./125/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = 0 umount2("./125/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) newfstatat(AT_FDCWD, "./125/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./125/file0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./125/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(4, 0x555556221770 /* 2 entries */, 32768) = 48 getdents64(4, 0x555556221770 /* 0 entries */, 32768) = 0 close(4) = 0 rmdir("./125/file0") = 0 getdents64(3, 0x555556219730 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./125") = 0 mkdir("./126", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5413 attached , child_tidptr=0x555556218690) = 5413 [pid 5413] set_robust_list(0x5555562186a0, 24) = 0 [pid 5413] chdir("./126") = 0 [pid 5413] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5413] setpgid(0, 0) = 0 [pid 5413] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5413] write(3, "1000", 4) = 4 [pid 5413] close(3) = 0 [pid 5413] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5413] futex(0x7f3dc91426cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5413] rt_sigaction(SIGRT_1, {sa_handler=0x7f3dc90dff70, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3dc90d1120}, NULL, 8) = 0 [pid 5413] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5413] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3dc9056000 [pid 5413] mprotect(0x7f3dc9057000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5413] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5413] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3dc9076990, parent_tid=0x7f3dc9076990, exit_signal=0, stack=0x7f3dc9056000, stack_size=