./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4235892277 <...> Warning: Permanently added '10.128.0.208' (ED25519) to the list of known hosts. execve("./syz-executor4235892277", ["./syz-executor4235892277"], 0x7ffc628dad50 /* 10 vars */) = 0 brk(NULL) = 0x55555671f000 brk(0x55555671fd00) = 0x55555671fd00 arch_prctl(ARCH_SET_FS, 0x55555671f380) = 0 set_tid_address(0x55555671f650) = 294 set_robust_list(0x55555671f660, 24) = 0 rseq(0x55555671fca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4235892277", 4096) = 28 getrandom("\x24\x1c\x00\xfc\x80\xc7\x15\x1f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555671fd00 brk(0x555556740d00) = 0x555556740d00 brk(0x555556741000) = 0x555556741000 mprotect(0x7f1de56ac000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 295 ./strace-static-x86_64: Process 295 attached [pid 295] set_robust_list(0x55555671f660, 24) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 294] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 294] <... clone resumed>, child_tidptr=0x55555671f650) = 296 [pid 294] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 297 [pid 294] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 298 [pid 294] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 299 ./strace-static-x86_64: Process 298 attached [pid 298] set_robust_list(0x55555671f660, 24) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 301 ./strace-static-x86_64: Process 301 attached [pid 301] set_robust_list(0x55555671f660, 24) = 0 ./strace-static-x86_64: Process 299 attached ./strace-static-x86_64: Process 296 attached ./strace-static-x86_64: Process 297 attached [pid 299] set_robust_list(0x55555671f660, 24 [pid 296] set_robust_list(0x55555671f660, 24 [pid 299] <... set_robust_list resumed>) = 0 [pid 297] set_robust_list(0x55555671f660, 24 [pid 301] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 22.601262][ T28] audit: type=1400 audit(1722312965.717:66): avc: denied { execmem } for pid=294 comm="syz-executor423" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.621412][ T28] audit: type=1400 audit(1722312965.737:67): avc: denied { read write } for pid=295 comm="syz-executor423" name="loop0" dev="devtmpfs" ino=114 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 301] setpgid(0, 0) = 0 [pid 301] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 301] write(3, "1000", 4) = 4 [pid 301] close(3) = 0 [pid 301] write(1, "executing program\n", 18executing program ) = 18 [pid 301] memfd_create("syzkaller", 0) = 3 [pid 301] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 301] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 301] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 301] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 302 [pid 301] ioctl(4, LOOP_SET_FD, 3 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] <... set_robust_list resumed>) = 0 [pid 296] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 302 attached [pid 302] set_robust_list(0x55555671f660, 24) = 0 [pid 302] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 302] setpgid(0, 0) = 0 [pid 302] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 302] write(3, "1000", 4) = 4 [pid 302] close(3) = 0 [pid 302] write(1, "executing program\n", 18executing program ) = 18 [pid 302] memfd_create("syzkaller", 0) = 3 [pid 302] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [ 22.656990][ T28] audit: type=1400 audit(1722312965.737:68): avc: denied { open } for pid=295 comm="syz-executor423" path="/dev/loop0" dev="devtmpfs" ino=114 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 22.679411][ T301] loop3: detected capacity change from 0 to 2048 [pid 301] <... ioctl resumed>) = 0 [pid 302] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 299] <... openat resumed>) = 3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 299] ioctl(3, LOOP_CLR_FD [pid 296] <... openat resumed>) = 3 [pid 299] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 297] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 299] close(3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 299] <... close resumed>) = 0 [pid 297] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 296] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] close(3 [pid 296] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 303 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 304 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 305 ./strace-static-x86_64: Process 305 attached [pid 305] set_robust_list(0x55555671f660, 24) = 0 [pid 305] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 305] setpgid(0, 0) = 0 [pid 305] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 305] write(3, "1000", 4) = 4 [pid 305] close(3) = 0 [pid 305] write(1, "executing program\n", 18executing program ) = 18 [pid 305] memfd_create("syzkaller", 0) = 3 [pid 305] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 301] close(3) = 0 [pid 301] close(4) = 0 [pid 301] mkdir("./file0", 0777) = 0 [pid 301] mount("/dev/loop3", "./file0", "ext4", MS_NOSUID|MS_SYNCHRONOUS|MS_MANDLOCK|MS_RELATIME|MS_STRICTATIME, ",errors=continue" [pid 305] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 305] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 305] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [ 22.681559][ T28] audit: type=1400 audit(1722312965.737:69): avc: denied { ioctl } for pid=295 comm="syz-executor423" path="/dev/loop0" dev="devtmpfs" ino=114 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 22.721164][ T301] ======================================================= [ 22.721164][ T301] WARNING: The mand mount option has been deprecated and [ 22.721164][ T301] and is ignored by this kernel. Remove the mand [ 22.721164][ T301] option from the mount to silence this warning. [ 22.721164][ T301] ======================================================= [pid 305] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 304 attached ./strace-static-x86_64: Process 303 attached [pid 302] <... write resumed>) = 1048576 [pid 304] set_robust_list(0x55555671f660, 24 [pid 303] set_robust_list(0x55555671f660, 24 [pid 302] munmap(0x7f1ddd1fa000, 138412032 [pid 304] <... set_robust_list resumed>) = 0 [pid 304] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 303] <... set_robust_list resumed>) = 0 [pid 302] <... munmap resumed>) = 0 [pid 304] <... prctl resumed>) = 0 [pid 304] setpgid(0, 0 [pid 303] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 302] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 304] <... setpgid resumed>) = 0 [pid 303] <... prctl resumed>) = 0 [pid 302] <... openat resumed>) = 4 [pid 304] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 303] setpgid(0, 0 [pid 302] ioctl(4, LOOP_SET_FD, 3 [pid 304] <... openat resumed>) = 3 [pid 303] <... setpgid resumed>) = 0 [pid 305] <... ioctl resumed>) = 0 [pid 305] close(3) = 0 [pid 305] close(4) = 0 [pid 305] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 305] mount("/dev/loop2", "./file0", "ext4", MS_NOSUID|MS_SYNCHRONOUS|MS_MANDLOCK|MS_RELATIME|MS_STRICTATIME, ",errors=continue" [pid 303] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 304] write(3, "1000", 4) = 4 [pid 303] <... openat resumed>) = 3 [pid 304] close(3 [pid 303] write(3, "1000", 4 [pid 304] <... close resumed>) = 0 [pid 303] <... write resumed>) = 4 executing program executing program [pid 304] write(1, "executing program\n", 18 [pid 303] close(3 [pid 302] <... ioctl resumed>) = 0 [pid 304] <... write resumed>) = 18 [pid 303] <... close resumed>) = 0 [pid 304] memfd_create("syzkaller", 0 [pid 302] close(3 [pid 303] write(1, "executing program\n", 18 [pid 304] <... memfd_create resumed>) = 3 [pid 303] <... write resumed>) = 18 [pid 304] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 302] <... close resumed>) = 0 [pid 304] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 303] memfd_create("syzkaller", 0 [pid 302] close(4 [pid 303] <... memfd_create resumed>) = 3 [pid 302] <... close resumed>) = 0 [pid 302] mkdir("./file0", 0777 [pid 303] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 304] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 302] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 303] <... mmap resumed>) = 0x7f1ddd1fa000 [ 22.734428][ T28] audit: type=1400 audit(1722312965.837:70): avc: denied { mounton } for pid=301 comm="syz-executor423" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 22.780025][ T305] loop2: detected capacity change from 0 to 2048 [ 22.789746][ T302] loop0: detected capacity change from 0 to 2048 [pid 302] mount("/dev/loop0", "./file0", "ext4", MS_NOSUID|MS_SYNCHRONOUS|MS_MANDLOCK|MS_RELATIME|MS_STRICTATIME, ",errors=continue" [pid 304] <... write resumed>) = 1048576 [pid 304] munmap(0x7f1ddd1fa000, 138412032 [pid 303] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 304] <... munmap resumed>) = 0 [pid 304] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 304] ioctl(4, LOOP_SET_FD, 3 [pid 303] <... write resumed>) = 1048576 [pid 301] <... mount resumed>) = 0 [pid 303] munmap(0x7f1ddd1fa000, 138412032 [pid 301] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 304] <... ioctl resumed>) = 0 [pid 304] close(3) = 0 [ 22.807263][ T301] EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none. [ 22.821657][ T28] audit: type=1400 audit(1722312965.937:71): avc: denied { mount } for pid=301 comm="syz-executor423" name="/" dev="loop3" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 22.824562][ T304] loop1: detected capacity change from 0 to 2048 [pid 304] close(4) = 0 [pid 304] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 304] mount("/dev/loop1", "./file0", "ext4", MS_NOSUID|MS_SYNCHRONOUS|MS_MANDLOCK|MS_RELATIME|MS_STRICTATIME, ",errors=continue" [pid 303] <... munmap resumed>) = 0 [pid 301] <... openat resumed>) = 3 [pid 303] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 301] chdir("./file0" [pid 305] <... mount resumed>) = 0 [pid 303] <... openat resumed>) = 4 [pid 301] <... chdir resumed>) = 0 [pid 305] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 303] ioctl(4, LOOP_SET_FD, 3 [pid 301] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 305] <... openat resumed>) = 3 [pid 302] <... mount resumed>) = 0 [pid 302] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 302] chdir("./file0") = 0 [pid 302] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 302] ioctl(4, LOOP_CLR_FD) = 0 [pid 302] close(4 [pid 301] <... openat resumed>) = 4 [pid 305] chdir("./file0" [pid 301] ioctl(4, LOOP_CLR_FD [pid 305] <... chdir resumed>) = 0 [pid 301] <... ioctl resumed>) = 0 [pid 305] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 303] <... ioctl resumed>) = 0 [pid 301] close(4 [pid 305] <... openat resumed>) = 4 [pid 301] <... close resumed>) = 0 [pid 305] ioctl(4, LOOP_CLR_FD [pid 303] close(3 [pid 302] <... close resumed>) = 0 [pid 301] chdir("./file0" [pid 305] <... ioctl resumed>) = 0 [pid 305] close(4 [pid 303] <... close resumed>) = 0 [pid 302] chdir("./file0" [pid 301] <... chdir resumed>) = 0 [pid 305] <... close resumed>) = 0 [pid 301] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 305] chdir("./file0" [pid 301] <... open resumed>) = 4 [pid 305] <... chdir resumed>) = 0 [pid 301] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 305] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 301] <... mount resumed>) = 0 [pid 305] <... open resumed>) = 4 [pid 301] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 305] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 301] <... open resumed>) = 5 [pid 305] <... mount resumed>) = 0 [pid 301] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0 [pid 305] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 301] <... mmap resumed>) = 0x20000000 [pid 305] <... open resumed>) = 5 [ 22.854909][ T302] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. [ 22.863205][ T28] audit: type=1400 audit(1722312965.967:72): avc: denied { mounton } for pid=304 comm="syz-executor423" path="/root/file0" dev="loop3" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 22.864943][ T305] EXT4-fs (loop2): mounted filesystem without journal. Quota mode: none. [ 22.894748][ T303] loop4: detected capacity change from 0 to 2048 [pid 305] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0 [pid 301] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 6 [pid 305] <... mmap resumed>) = 0x20000000 [pid 305] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 6 [pid 305] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 305] exit_group(0) = ? [pid 305] +++ exited with 0 +++ [pid 301] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 301] exit_group(0) = ? [pid 301] +++ exited with 0 +++ [pid 302] <... chdir resumed>) = 0 [pid 302] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 4 [pid 302] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 302] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 302] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 302] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 6 [pid 302] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 302] exit_group(0) = ? [pid 302] +++ exited with 0 +++ [pid 303] close(4) = 0 [pid 303] mkdir("./file0", 0777) = -1 EEXIST (File exists) [pid 303] mount("/dev/loop4", "./file0", "ext4", MS_NOSUID|MS_SYNCHRONOUS|MS_MANDLOCK|MS_RELATIME|MS_STRICTATIME, ",errors=continue" [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=301, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=305, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=302, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] ioctl(3, LOOP_CLR_FD [pid 297] <... openat resumed>) = 3 [pid 298] <... ioctl resumed>) = 0 [pid 297] ioctl(3, LOOP_CLR_FD [pid 295] <... openat resumed>) = 3 [pid 298] close(3) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] close(3 [pid 295] close(3 [pid 297] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 319 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 320 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 321 ./strace-static-x86_64: Process 320 attached ./strace-static-x86_64: Process 321 attached ./strace-static-x86_64: Process 319 attached [pid 319] set_robust_list(0x55555671f660, 24) = 0 [pid 319] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 319] setpgid(0, 0) = 0 [pid 319] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 321] set_robust_list(0x55555671f660, 24) = 0 [pid 319] <... openat resumed>) = 3 [pid 319] write(3, "1000", 4) = 4 executing program [pid 321] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 320] set_robust_list(0x55555671f660, 24 [pid 319] close(3) = 0 [pid 319] write(1, "executing program\n", 18) = 18 [pid 319] memfd_create("syzkaller", 0) = 3 [pid 319] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 321] <... prctl resumed>) = 0 [pid 320] <... set_robust_list resumed>) = 0 [pid 321] setpgid(0, 0 [pid 320] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 321] <... setpgid resumed>) = 0 [pid 321] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 320] <... prctl resumed>) = 0 [pid 320] setpgid(0, 0) = 0 [pid 320] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 321] <... openat resumed>) = 3 [pid 320] <... openat resumed>) = 3 [pid 321] write(3, "1000", 4) = 4 [pid 320] write(3, "1000", 4 [pid 321] close(3 [pid 320] <... write resumed>) = 4 [pid 321] <... close resumed>) = 0 [pid 320] close(3 [pid 321] write(1, "executing program\n", 18 [pid 320] <... close resumed>) = 0 executing program [pid 320] write(1, "executing program\n", 18 [pid 321] <... write resumed>) = 18 executing program [pid 321] memfd_create("syzkaller", 0 [pid 320] <... write resumed>) = 18 [pid 320] memfd_create("syzkaller", 0 [pid 319] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 320] <... memfd_create resumed>) = 3 [pid 321] <... memfd_create resumed>) = 3 [pid 321] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 320] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 319] munmap(0x7f1ddd1fa000, 138412032 [pid 321] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 319] <... munmap resumed>) = 0 [pid 319] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 320] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 319] <... openat resumed>) = 4 [pid 319] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 319] ioctl(4, LOOP_CLR_FD) = 0 [ 22.916183][ T28] audit: type=1400 audit(1722312966.017:73): avc: denied { write } for pid=301 comm="syz-executor423" name="file0" dev="loop2" ino=12 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 22.954451][ T304] EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none. [pid 321] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 320] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 304] <... mount resumed>) = 0 [pid 319] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 319] close(4) = 0 [pid 319] close(3) = 0 [pid 319] chdir("./file0") = 0 [pid 319] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 304] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 319] <... open resumed>) = 3 [pid 304] <... openat resumed>) = 3 [pid 319] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 304] chdir("./file0" [pid 319] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 304] <... chdir resumed>) = 0 [pid 319] <... open resumed>) = 4 [pid 319] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 304] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 304] ioctl(4, LOOP_CLR_FD) = 0 [pid 304] close(4) = 0 [pid 304] chdir("./file0") = 0 [pid 304] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 319] <... mmap resumed>) = 0x20000000 [pid 304] <... open resumed>) = 4 [pid 304] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 304] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 319] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 304] <... open resumed>) = 5 [pid 304] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0 [pid 319] <... openat resumed>) = 5 [pid 319] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 319] exit_group(0) = ? [pid 320] <... write resumed>) = 1048576 [pid 319] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=319, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 303] <... mount resumed>) = 0 [pid 303] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 303] chdir("./file0") = 0 [ 22.970412][ T28] audit: type=1400 audit(1722312966.017:74): avc: denied { add_name } for pid=301 comm="syz-executor423" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 22.989720][ T303] EXT4-fs (loop4): mounted filesystem without journal. Quota mode: none. [pid 321] <... write resumed>) = 1048576 [pid 320] munmap(0x7f1ddd1fa000, 138412032 [pid 303] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 321] munmap(0x7f1ddd1fa000, 138412032 [pid 303] <... openat resumed>) = 4 [pid 298] <... restart_syscall resumed>) = 0 [pid 321] <... munmap resumed>) = 0 [pid 303] ioctl(4, LOOP_CLR_FD [pid 321] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 303] <... ioctl resumed>) = 0 [pid 321] <... openat resumed>) = 4 [pid 303] close(4 [pid 321] ioctl(4, LOOP_SET_FD, 3 [pid 303] <... close resumed>) = 0 [pid 321] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 303] chdir("./file0" [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 321] ioctl(4, LOOP_CLR_FD [pid 303] <... chdir resumed>) = 0 [pid 321] <... ioctl resumed>) = 0 [pid 303] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] <... openat resumed>) = 3 [pid 303] <... open resumed>) = 4 [pid 298] ioctl(3, LOOP_CLR_FD [pid 303] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 303] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 298] close(3 [pid 303] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0 [pid 321] ioctl(4, LOOP_SET_FD, 3 [pid 303] <... mmap resumed>) = 0x20000000 [pid 298] <... close resumed>) = 0 [pid 321] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 321] close(4 [pid 303] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 321] <... close resumed>) = 0 [pid 321] close(3 [pid 303] <... openat resumed>) = 6 [pid 321] <... close resumed>) = 0 [pid 320] <... munmap resumed>) = 0 [pid 304] <... mmap resumed>) = 0x20000000 [ 23.016055][ T28] audit: type=1400 audit(1722312966.017:75): avc: denied { create } for pid=301 comm="syz-executor423" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 23.059857][ T303] ================================================================== [pid 321] chdir("./file0"executing program [pid 303] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 321] <... chdir resumed>) = 0 [pid 320] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 304] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 324 ./strace-static-x86_64: Process 324 attached [pid 321] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 320] <... openat resumed>) = 4 [pid 324] set_robust_list(0x55555671f660, 24 [pid 320] ioctl(4, LOOP_SET_FD, 3 [pid 324] <... set_robust_list resumed>) = 0 [pid 320] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 324] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 320] ioctl(4, LOOP_CLR_FD [pid 324] <... prctl resumed>) = 0 [pid 320] <... ioctl resumed>) = 0 [pid 324] setpgid(0, 0) = 0 [pid 324] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 324] write(3, "1000", 4) = 4 [pid 324] close(3) = 0 [pid 324] write(1, "executing program\n", 18) = 18 [pid 324] memfd_create("syzkaller", 0) = 3 [pid 324] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 324] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 320] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 320] close(4) = 0 [pid 320] close(3) = 0 [pid 320] chdir("./file0") = 0 [pid 320] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 324] <... write resumed>) = 1048576 [pid 324] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 324] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 324] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 324] ioctl(4, LOOP_CLR_FD) = 0 [pid 324] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 324] close(4) = 0 [pid 324] close(3) = 0 [pid 324] chdir("./file0") = 0 [ 23.067757][ T303] BUG: KASAN: use-after-free in ext4_search_dir+0xf7/0x1b0 [ 23.074786][ T303] Read of size 1 at addr ffff888125d33d0b by task syz-executor423/303 [ 23.082772][ T303] [ 23.084966][ T303] CPU: 0 PID: 303 Comm: syz-executor423 Not tainted 6.1.90-syzkaller-00122-g7fa70ede91bb #0 [ 23.094839][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 23.104738][ T303] Call Trace: [ 23.107848][ T303] [ 23.110630][ T303] dump_stack_lvl+0x151/0x1b7 [ 23.115144][ T303] ? nf_tcp_handle_invalid+0x3f1/0x3f1 [pid 324] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 304] <... openat resumed>) = 6 [pid 304] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 304] exit_group(0) = ? [pid 304] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=304, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 320] <... open resumed>) = 3 [pid 320] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 320] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 320] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 320] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 320] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 320] exit_group(0) = ? [pid 320] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=320, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 296] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 295] close(3 [pid 296] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 326 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 325 [pid 321] <... open resumed>) = 3 [pid 321] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 321] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 321] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 321] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 321] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 321] exit_group(0) = ? [pid 321] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=321, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 324] <... open resumed>) = 3 [pid 324] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 324] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 324] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 327 [pid 324] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 324] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 324] exit_group(0) = ? [pid 324] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=324, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 328 [ 23.120437][ T303] ? _printk+0xd1/0x111 [ 23.124433][ T303] ? __virt_addr_valid+0x242/0x2f0 [ 23.129381][ T303] print_report+0x158/0x4e0 [ 23.133717][ T303] ? __virt_addr_valid+0x242/0x2f0 [ 23.138668][ T303] ? kasan_addr_to_slab+0xd/0x80 [ 23.143441][ T303] ? ext4_search_dir+0xf7/0x1b0 [ 23.148124][ T303] kasan_report+0x13c/0x170 [ 23.152461][ T303] ? ext4_search_dir+0xf7/0x1b0 [ 23.157151][ T303] __asan_report_load1_noabort+0x14/0x20 [ 23.162618][ T303] ext4_search_dir+0xf7/0x1b0 ./strace-static-x86_64: Process 325 attached [pid 325] set_robust_list(0x55555671f660, 24) = 0 [pid 325] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 325] setpgid(0, 0) = 0 [pid 325] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 325] write(3, "1000", 4) = 4 [pid 325] close(3) = 0 [pid 325] write(1, "executing program\n", 18executing program ) = 18 [pid 325] memfd_create("syzkaller", 0) = 3 [pid 325] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [ 23.167133][ T303] ext4_find_inline_entry+0x4b6/0x5e0 [ 23.172340][ T303] ? x64_sys_call+0x49d/0x9a0 [ 23.176867][ T303] ? do_syscall_64+0x3b/0xb0 [ 23.181300][ T303] ? ext4_try_create_inline_dir+0x320/0x320 [ 23.187012][ T303] __ext4_find_entry+0x2b0/0x1af0 [ 23.191871][ T303] ? ext4_fname_setup_ci_filename+0x70/0x480 [ 23.197682][ T303] ? ext4_ci_compare+0x660/0x660 [ 23.202457][ T303] ? memcpy+0x56/0x70 [ 23.206276][ T303] ? ext4_fname_prepare_lookup+0x3b5/0x4e0 [ 23.211922][ T303] ? d_alloc_parallel+0x116c/0x12e0 [pid 325] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 325] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 325] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 325] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 325] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 327 attached [pid 327] set_robust_list(0x55555671f660, 24) = 0 [pid 327] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 325] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 325] close(4) = 0 [pid 325] close(3) = 0 [pid 327] <... prctl resumed>) = 0 [pid 327] setpgid(0, 0) = 0 [pid 327] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 327] write(3, "1000", 4) = 4 [pid 327] close(3) = 0 [pid 327] write(1, "executing program\n", 18executing program ) = 18 [pid 327] memfd_create("syzkaller", 0) = 3 [pid 325] chdir("./file0") = 0 [pid 325] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 327] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 325] <... open resumed>) = 3 [pid 327] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 325] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 327] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 325] <... mount resumed>) = 0 [pid 325] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 325] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 325] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 325] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 325] exit_group(0) = ? [ 23.216957][ T303] ? generic_set_encrypted_ci_d_ops+0x91/0xf0 [ 23.223028][ T303] ext4_lookup+0x176/0x740 [ 23.227277][ T303] ? ext4_add_entry+0xed0/0xed0 [ 23.231974][ T303] ? __down_common+0x690/0x690 [ 23.236566][ T303] ? lockref_get_not_dead+0x248/0x340 [ 23.241773][ T303] ? lockref_mark_dead+0xb0/0xb0 [ 23.246550][ T303] __lookup_slow+0x2b9/0x3e0 [ 23.250974][ T303] ? lookup_one_len+0x2c0/0x2c0 [ 23.255666][ T303] lookup_slow+0x5a/0x80 [ 23.259736][ T303] walk_component+0x2e7/0x410 [ 23.264258][ T303] path_lookupat+0x16d/0x450 [pid 325] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=325, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 329 ./strace-static-x86_64: Process 329 attached [pid 329] set_robust_list(0x55555671f660, 24) = 0 [pid 329] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 329] setpgid(0, 0) = 0 [pid 329] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 329] write(3, "1000", 4) = 4 [pid 329] close(3) = 0 [pid 329] write(1, "executing program\n", 18executing program ) = 18 [pid 329] memfd_create("syzkaller", 0) = 3 [pid 329] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 327] <... write resumed>) = 1048576 [pid 329] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 327] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 327] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 327] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 327] ioctl(4, LOOP_CLR_FD) = 0 [pid 327] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [ 23.268685][ T303] filename_lookup+0x251/0x600 [ 23.273295][ T303] ? hashlen_string+0x120/0x120 [ 23.277969][ T303] ? strncpy_from_user+0x169/0x2b0 [ 23.282914][ T303] ? getname_flags+0x1fd/0x520 [ 23.287603][ T303] user_path_at_empty+0x43/0x1a0 [ 23.292377][ T303] __se_sys_mount+0x285/0x3b0 [ 23.296889][ T303] ? __x64_sys_mount+0xd0/0xd0 [ 23.301486][ T303] ? fpregs_restore_userregs+0x130/0x290 [ 23.306963][ T303] __x64_sys_mount+0xbf/0xd0 [ 23.311380][ T303] x64_sys_call+0x49d/0x9a0 [ 23.315729][ T303] do_syscall_64+0x3b/0xb0 [pid 327] close(4) = 0 [pid 327] close(3) = 0 [pid 327] chdir("./file0") = 0 [pid 327] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 327] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 327] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 327] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 327] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 327] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 327] exit_group(0) = ? [pid 329] <... write resumed>) = 1048576 [pid 327] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=327, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 329] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 330 [pid 329] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 329] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 329] ioctl(4, LOOP_CLR_FD) = 0 [pid 329] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 329] close(4) = 0 [pid 329] close(3) = 0 ./strace-static-x86_64: Process 330 attached [pid 330] set_robust_list(0x55555671f660, 24) = 0 [pid 330] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 330] setpgid(0, 0) = 0 [pid 330] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [ 23.319971][ T303] ? clear_bhb_loop+0x55/0xb0 [ 23.324484][ T303] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 23.330218][ T303] RIP: 0033:0x7f1de5638cc9 [ 23.334468][ T303] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 23.353909][ T303] RSP: 002b:00007ffc445c7338 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 23.362160][ T303] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f1de5638cc9 [pid 330] write(3, "1000", 4) = 4 [pid 330] close(3) = 0 [pid 330] write(1, "executing program\n", 18executing program ) = 18 [pid 330] memfd_create("syzkaller", 0 [pid 329] chdir("./file0") = 0 [pid 329] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 330] <... memfd_create resumed>) = 3 [pid 329] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 330] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 329] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 329] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 329] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 329] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 329] exit_group(0) = ? [pid 329] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=329, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 331 [pid 330] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 ./strace-static-x86_64: Process 331 attached [pid 331] set_robust_list(0x55555671f660, 24) = 0 [pid 331] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 331] setpgid(0, 0) = 0 [pid 331] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 331] write(3, "1000", 4) = 4 [pid 331] close(3) = 0 [pid 331] write(1, "executing program\n", 18executing program ) = 18 [ 23.369962][ T303] RDX: 0000000000000000 RSI: 0000000020002ac0 RDI: 0000000000000000 [ 23.377775][ T303] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000 [ 23.385581][ T303] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 23.393395][ T303] R13: 00007ffc445c7380 R14: 00007ffc445c736c R15: 00007f1de568103b [ 23.401210][ T303] [ 23.404068][ T303] [ 23.406239][ T303] The buggy address belongs to the physical page: [ 23.412494][ T303] page:ffffea0004974cc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x125d33 [pid 331] memfd_create("syzkaller", 0) = 3 [pid 331] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 331] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 330] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 330] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 330] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 330] ioctl(4, LOOP_CLR_FD) = 0 [pid 330] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 330] close(4) = 0 [pid 330] close(3) = 0 [pid 330] chdir("./file0") = 0 [pid 330] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 330] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 330] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 330] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 330] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 330] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 330] exit_group(0) = ? [pid 330] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=330, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 331] <... write resumed>) = 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 332 [ 23.422557][ T303] flags: 0x4000000000000000(zone=1) [ 23.427604][ T303] raw: 4000000000000000 ffffea0004974d08 ffffea0004974c88 0000000000000000 [ 23.436022][ T303] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 [ 23.444426][ T303] page dumped because: kasan: bad access detected [ 23.450689][ T303] page_owner tracks the page as freed ./strace-static-x86_64: Process 332 attached [pid 332] set_robust_list(0x55555671f660, 24) = 0 [pid 332] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 332] setpgid(0, 0) = 0 [pid 332] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 332] write(3, "1000", 4) = 4 [pid 332] close(3) = 0 [pid 332] write(1, "executing program\n", 18executing program ) = 18 [pid 332] memfd_create("syzkaller", 0) = 3 [pid 332] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 332] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 331] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 331] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 331] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 331] ioctl(4, LOOP_CLR_FD) = 0 [pid 331] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 331] close(4) = 0 [pid 331] close(3) = 0 [pid 331] chdir("./file0") = 0 [pid 331] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 331] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 331] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 331] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 331] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 331] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 331] exit_group(0) = ? [pid 331] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=331, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 333 [ 23.455887][ T303] page last allocated via order 0, migratetype Movable, gfp_mask 0x8140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO|__GFP_CMA), pid 321, tgid 321 (syz-executor423), ts 22970928774, free_ts 23037047262 [ 23.475418][ T303] post_alloc_hook+0x213/0x220 [ 23.480021][ T303] prep_new_page+0x1b/0x110 [ 23.484351][ T303] get_page_from_freelist+0x27ea/0x2870 [ 23.489732][ T303] __alloc_pages+0x3a1/0x780 [ 23.494156][ T303] __folio_alloc+0x15/0x40 [ 23.498411][ T303] handle_mm_fault+0x1cf7/0x30e0 [ 23.503185][ T303] exc_page_fault+0x3b3/0x700 [ 23.507705][ T303] asm_exc_page_fault+0x27/0x30 [ 23.512383][ T303] page last free stack trace: [ 23.516913][ T303] free_unref_page_prepare+0x83d/0x850 [pid 332] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 333 attached [pid 333] set_robust_list(0x55555671f660, 24) = 0 [pid 333] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 333] setpgid(0, 0) = 0 [pid 333] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 333] write(3, "1000", 4) = 4 [pid 333] close(3) = 0 [pid 333] write(1, "executing program\n", 18executing program ) = 18 [pid 333] memfd_create("syzkaller", 0) = 3 [pid 333] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 332] munmap(0x7f1ddd1fa000, 138412032 [pid 333] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 332] <... munmap resumed>) = 0 [pid 332] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 332] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 332] ioctl(4, LOOP_CLR_FD) = 0 [pid 332] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 332] close(4) = 0 [pid 332] close(3) = 0 [pid 332] chdir("./file0") = 0 [pid 332] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 332] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 332] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 332] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 332] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 332] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 332] exit_group(0) = ? [pid 332] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=332, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 334 [ 23.522194][ T303] free_unref_page_list+0xf1/0x7b0 [ 23.527137][ T303] release_pages+0xf7f/0xfe0 [ 23.531567][ T303] free_pages_and_swap_cache+0x8a/0xa0 [ 23.536875][ T303] tlb_finish_mmu+0x1e0/0x3f0 [ 23.541372][ T303] unmap_region+0x2c1/0x310 [ 23.545711][ T303] do_mas_align_munmap+0xd05/0x1400 [ 23.550747][ T303] do_mas_munmap+0x23e/0x2b0 [ 23.555171][ T303] __vm_munmap+0x263/0x3a0 [ 23.559423][ T303] __x64_sys_munmap+0x6b/0x80 [ 23.563939][ T303] x64_sys_call+0x75/0x9a0 [ 23.568191][ T303] do_syscall_64+0x3b/0xb0 [pid 333] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 334 attached [pid 334] set_robust_list(0x55555671f660, 24) = 0 [pid 334] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 334] setpgid(0, 0) = 0 [pid 334] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 334] write(3, "1000", 4) = 4 [pid 334] close(3) = 0 [pid 334] write(1, "executing program\n", 18executing program ) = 18 [pid 334] memfd_create("syzkaller", 0) = 3 [pid 334] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 334] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 333] <... write resumed>) = 1048576 [pid 333] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 333] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 333] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 333] ioctl(4, LOOP_CLR_FD) = 0 [pid 333] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 333] close(4) = 0 [pid 333] close(3) = 0 [pid 333] chdir("./file0") = 0 [pid 333] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 333] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 333] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 333] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 333] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 333] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 333] exit_group(0) = ? [pid 333] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=333, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [ 23.572444][ T303] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 23.578178][ T303] [ 23.580339][ T303] Memory state around the buggy address: [ 23.585819][ T303] ffff888125d33c00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 23.593720][ T303] ffff888125d33c80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 23.601615][ T303] >ffff888125d33d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 23.609508][ T303] ^ [ 23.613675][ T303] ffff888125d33d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 335 [pid 334] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 335 attached [pid 335] set_robust_list(0x55555671f660, 24) = 0 [pid 335] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 335] setpgid(0, 0) = 0 [pid 335] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 335] write(3, "1000", 4) = 4 [pid 335] close(3./strace-static-x86_64: Process 328 attached ./strace-static-x86_64: Process 326 attached ) = 0 [pid 335] write(1, "executing program\n", 18executing program ) = 18 [pid 335] memfd_create("syzkaller", 0) = 3 [pid 335] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 328] set_robust_list(0x55555671f660, 24 [pid 326] set_robust_list(0x55555671f660, 24 [pid 328] <... set_robust_list resumed>) = 0 [pid 303] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 326] <... set_robust_list resumed>) = 0 [pid 334] munmap(0x7f1ddd1fa000, 138412032 [pid 328] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 326] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 328] <... prctl resumed>) = 0 [pid 326] <... prctl resumed>) = 0 [pid 303] exit_group(0 [pid 328] setpgid(0, 0 [pid 326] setpgid(0, 0 [pid 328] <... setpgid resumed>) = 0 [pid 303] <... exit_group resumed>) = ? [pid 326] <... setpgid resumed>) = 0 [pid 328] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 326] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 328] write(3, "1000", 4executing program ) = 4 [pid 326] <... openat resumed>) = 3 [pid 328] close(3 [pid 326] write(3, "1000", 4 [pid 334] <... munmap resumed>) = 0 [pid 328] <... close resumed>) = 0 [pid 326] <... write resumed>) = 4 [pid 334] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 328] write(1, "executing program\n", 18 [pid 326] close(3 [pid 328] <... write resumed>) = 18 [pid 326] <... close resumed>) = 0 [pid 334] <... openat resumed>) = 4 [pid 328] memfd_create("syzkaller", 0 [pid 326] write(1, "executing program\n", 18executing program [pid 334] ioctl(4, LOOP_SET_FD, 3 [pid 328] <... memfd_create resumed>) = 3 [pid 326] <... write resumed>) = 18 [pid 328] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 326] memfd_create("syzkaller", 0 [pid 334] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 334] ioctl(4, LOOP_CLR_FD [pid 328] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 326] <... memfd_create resumed>) = 3 [pid 335] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 328] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 326] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 334] <... ioctl resumed>) = 0 [pid 326] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 335] <... write resumed>) = 1048576 [pid 335] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 335] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 335] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 335] ioctl(4, LOOP_CLR_FD [pid 326] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 335] <... ioctl resumed>) = 0 [pid 326] <... write resumed>) = 1048576 [pid 334] ioctl(4, LOOP_SET_FD, 3 [pid 328] <... write resumed>) = 1048576 [pid 326] munmap(0x7f1ddd1fa000, 138412032 [pid 303] +++ exited with 0 +++ [pid 334] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 334] close(4 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=303, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 334] <... close resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 335] ioctl(4, LOOP_SET_FD, 3 [pid 334] close(3 [pid 328] munmap(0x7f1ddd1fa000, 138412032 [pid 326] <... munmap resumed>) = 0 [pid 299] <... openat resumed>) = 3 [pid 334] <... close resumed>) = 0 [pid 334] chdir("./file0") = 0 [pid 334] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 334] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 334] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 334] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 334] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 334] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 334] exit_group(0 [pid 328] <... munmap resumed>) = 0 [pid 334] <... exit_group resumed>) = ? [pid 335] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 334] +++ exited with 0 +++ [pid 335] close(4 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=334, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] ioctl(3, LOOP_CLR_FD [pid 335] <... close resumed>) = 0 [pid 335] close(3 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 299] <... ioctl resumed>) = 0 [pid 328] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 326] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 328] <... openat resumed>) = 4 [pid 326] <... openat resumed>) = 4 [pid 299] close(3 [pid 328] ioctl(4, LOOP_SET_FD, 3 [pid 326] ioctl(4, LOOP_SET_FD, 3 [pid 328] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] <... close resumed>) = 0 [pid 326] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 326] ioctl(4, LOOP_CLR_FD [pid 328] ioctl(4, LOOP_CLR_FD [pid 326] <... ioctl resumed>) = 0 [pid 328] <... ioctl resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 336 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 328] ioctl(4, LOOP_SET_FD, 3 [pid 297] <... ioctl resumed>) = 0 [pid 326] ioctl(4, LOOP_SET_FD, 3 [pid 297] close(3 [pid 328] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 297] <... close resumed>) = 0 [pid 326] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 328] close(4 [pid 326] close(4 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 328] <... close resumed>) = 0 [pid 326] <... close resumed>) = 0 [pid 326] close(3 [pid 328] close(3 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 337 [pid 328] <... close resumed>) = 0 ./strace-static-x86_64: Process 336 attached ./strace-static-x86_64: Process 337 attached [pid 336] set_robust_list(0x55555671f660, 24) = 0 [pid 336] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 337] set_robust_list(0x55555671f660, 24) = 0 [pid 336] <... prctl resumed>) = 0 [pid 335] <... close resumed>) = 0 [pid 335] chdir("./file0") = 0 [pid 335] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 336] setpgid(0, 0 [pid 335] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 335] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 335] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 326] <... close resumed>) = 0 [pid 328] chdir("./file0") = 0 [pid 336] <... setpgid resumed>) = 0 [pid 328] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 326] chdir("./file0") = 0 [pid 328] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 326] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 326] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 328] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 328] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 326] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 326] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 336] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 337] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 336] write(3, "1000", 4) = 4 [pid 335] <... mmap resumed>) = 0x20000000 [pid 337] <... prctl resumed>) = 0 [pid 336] close(3 [pid 337] setpgid(0, 0 [pid 336] <... close resumed>) = 0 [pid 337] <... setpgid resumed>) = 0 [pid 335] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 336] write(1, "executing program\n", 18 [pid 335] <... openat resumed>) = 5 [pid 335] mount(NULL, 0x20002ac0, NULL, 0, NULLexecuting program [pid 336] <... write resumed>) = 18 [pid 335] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 326] <... mmap resumed>) = 0x20000000 [pid 335] exit_group(0) = ? [pid 336] memfd_create("syzkaller", 0 [pid 326] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 328] <... mmap resumed>) = 0x20000000 [pid 326] <... openat resumed>) = 5 [pid 328] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 337] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 336] <... memfd_create resumed>) = 3 [pid 326] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 328] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 326] exit_group(0 [pid 328] exit_group(0 [pid 326] <... exit_group resumed>) = ? [pid 328] <... exit_group resumed>) = ? [pid 337] <... openat resumed>) = 3 [pid 336] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 326] +++ exited with 0 +++ [pid 337] write(3, "1000", 4 [pid 336] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 328] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=326, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=328, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 335] +++ exited with 0 +++ [ 23.621575][ T303] ffff888125d33e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 23.629469][ T303] ================================================================== [ 23.643503][ T303] Disabling lock debugging due to kernel taint [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 337] <... write resumed>) = 4 [pid 298] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=335, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 337] close(3 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] <... restart_syscall resumed>) = 0 [pid 337] <... close resumed>) = 0 [pid 336] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 337] write(1, "executing program\n", 18executing program [pid 298] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 337] <... write resumed>) = 18 [pid 298] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 337] memfd_create("syzkaller", 0 [pid 298] close(3 [pid 296] close(3 [pid 295] <... openat resumed>) = 3 [pid 337] <... memfd_create resumed>) = 3 [pid 298] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 337] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... ioctl resumed>) = 0 [pid 337] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 295] close(3 [pid 337] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 338 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 339 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 340 ./strace-static-x86_64: Process 340 attached ./strace-static-x86_64: Process 339 attached ./strace-static-x86_64: Process 338 attached [pid 340] set_robust_list(0x55555671f660, 24 [pid 339] set_robust_list(0x55555671f660, 24 [pid 338] set_robust_list(0x55555671f660, 24 [pid 340] <... set_robust_list resumed>) = 0 [pid 339] <... set_robust_list resumed>) = 0 [pid 338] <... set_robust_list resumed>) = 0 [pid 338] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 339] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 338] <... prctl resumed>) = 0 [pid 340] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 339] <... prctl resumed>) = 0 [pid 340] <... prctl resumed>) = 0 [pid 338] setpgid(0, 0 [pid 339] setpgid(0, 0 [pid 340] setpgid(0, 0 [pid 339] <... setpgid resumed>) = 0 [pid 338] <... setpgid resumed>) = 0 [pid 340] <... setpgid resumed>) = 0 [pid 339] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 338] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 339] <... openat resumed>) = 3 [pid 338] <... openat resumed>) = 3 executing program executing program [pid 340] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 339] write(3, "1000", 4 [pid 338] write(3, "1000", 4 [pid 340] <... openat resumed>) = 3 [pid 339] <... write resumed>) = 4 [pid 340] write(3, "1000", 4 [pid 338] <... write resumed>) = 4 [pid 340] <... write resumed>) = 4 [pid 339] close(3 [pid 338] close(3 [pid 340] close(3 [pid 339] <... close resumed>) = 0 [pid 340] <... close resumed>) = 0 [pid 339] write(1, "executing program\n", 18 [pid 338] <... close resumed>) = 0 [pid 340] write(1, "executing program\n", 18 [pid 339] <... write resumed>) = 18 [pid 338] write(1, "executing program\n", 18 [pid 340] <... write resumed>) = 18 executing program [pid 340] memfd_create("syzkaller", 0 [pid 339] memfd_create("syzkaller", 0 [pid 338] <... write resumed>) = 18 [pid 340] <... memfd_create resumed>) = 3 [pid 339] <... memfd_create resumed>) = 3 [pid 338] memfd_create("syzkaller", 0 [pid 340] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 339] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 338] <... memfd_create resumed>) = 3 [pid 340] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 339] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 338] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 336] <... write resumed>) = 1048576 [pid 337] <... write resumed>) = 1048576 [pid 337] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 337] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 337] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 337] ioctl(4, LOOP_CLR_FD) = 0 [pid 336] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 336] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 339] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 338] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 337] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 337] close(4) = 0 [pid 337] close(3 [pid 336] <... openat resumed>) = 4 [pid 336] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 336] ioctl(4, LOOP_CLR_FD) = 0 [pid 337] <... close resumed>) = 0 [pid 337] chdir("./file0") = 0 [pid 337] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 336] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 336] close(4) = 0 [pid 336] close(3) = 0 [pid 340] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 337] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 338] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 337] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 337] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 336] chdir("./file0") = 0 [pid 336] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 336] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 339] <... write resumed>) = 1048576 [pid 336] <... mount resumed>) = 0 [pid 336] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 336] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 337] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 337] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 337] exit_group(0) = ? [pid 338] <... write resumed>) = 1048576 [pid 337] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=337, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 336] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 336] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 336] exit_group(0) = ? [pid 336] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=336, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] close(3 [pid 299] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 341 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 342 [pid 340] <... write resumed>) = 1048576 [pid 340] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 340] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 340] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 340] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 341 attached [pid 341] set_robust_list(0x55555671f660, 24) = 0 [pid 341] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 340] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 340] close(4) = 0 [pid 340] close(3 [pid 341] <... prctl resumed>) = 0 [pid 341] setpgid(0, 0) = 0 [pid 341] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 341] write(3, "1000", 4) = 4 [pid 341] close(3) = 0 ./strace-static-x86_64: Process 342 attached [pid 339] munmap(0x7f1ddd1fa000, 138412032 [pid 338] munmap(0x7f1ddd1fa000, 138412032 [pid 342] set_robust_list(0x55555671f660, 24 [pid 341] write(1, "executing program\n", 18 [pid 339] <... munmap resumed>) = 0 [pid 342] <... set_robust_list resumed>) = 0 [pid 339] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 338] <... munmap resumed>) = 0 [pid 342] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 339] <... openat resumed>) = 4 [pid 338] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 342] <... prctl resumed>) = 0 [pid 339] ioctl(4, LOOP_SET_FD, 3 [pid 338] <... openat resumed>) = 4 [pid 342] setpgid(0, 0 [pid 339] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 338] ioctl(4, LOOP_SET_FD, 3 [pid 342] <... setpgid resumed>) = 0 [pid 339] ioctl(4, LOOP_CLR_FD [pid 338] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 342] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 339] <... ioctl resumed>) = 0 [pid 338] ioctl(4, LOOP_CLR_FD [pid 342] <... openat resumed>) = 3 [pid 338] <... ioctl resumed>) = 0 [pid 342] write(3, "1000", 4) = 4 [pid 342] close(3) = 0 executing program [pid 342] write(1, "executing program\n", 18) = 18 [pid 342] memfd_create("syzkaller", 0 [pid 339] ioctl(4, LOOP_SET_FD, 3 [pid 342] <... memfd_create resumed>) = 3 [pid 339] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 338] ioctl(4, LOOP_SET_FD, 3 [pid 342] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 339] close(4 [pid 338] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 342] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 339] <... close resumed>) = 0 [pid 338] close(4executing program [pid 341] <... write resumed>) = 18 [pid 341] memfd_create("syzkaller", 0) = 3 [pid 340] <... close resumed>) = 0 [pid 341] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 339] close(3 [pid 338] <... close resumed>) = 0 [pid 339] <... close resumed>) = 0 [pid 338] close(3 [pid 340] chdir("./file0") = 0 [pid 340] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 340] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 340] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 338] <... close resumed>) = 0 [pid 339] chdir("./file0" [pid 340] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 340] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 342] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 339] <... chdir resumed>) = 0 [pid 338] chdir("./file0" [pid 339] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 338] <... chdir resumed>) = 0 [pid 339] <... open resumed>) = 3 [pid 338] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 339] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 338] <... open resumed>) = 3 [pid 339] <... mount resumed>) = 0 [pid 338] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 339] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 338] <... mount resumed>) = 0 [pid 339] <... open resumed>) = 4 [pid 338] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 339] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 338] <... open resumed>) = 4 [pid 340] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 339] <... mmap resumed>) = 0x20000000 [pid 338] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 339] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 340] exit_group(0 [pid 338] <... mmap resumed>) = 0x20000000 [pid 339] <... openat resumed>) = 5 [pid 338] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 339] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 338] <... openat resumed>) = 5 [pid 339] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 338] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 339] exit_group(0 [pid 338] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 339] <... exit_group resumed>) = ? [pid 338] exit_group(0) = ? [pid 340] <... exit_group resumed>) = ? [pid 339] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=339, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 338] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=338, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 340] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=340, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 342] <... write resumed>) = 1048576 [pid 341] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 341] munmap(0x7f1ddd1fa000, 138412032 [pid 298] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] <... restart_syscall resumed>) = 0 [pid 298] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] close(3 [pid 296] close(3 [pid 295] <... openat resumed>) = 3 [pid 298] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... ioctl resumed>) = 0 [pid 295] close(3 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 344 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 343 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 343 attached [pid 342] munmap(0x7f1ddd1fa000, 138412032 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 345 [pid 342] <... munmap resumed>) = 0 [pid 343] set_robust_list(0x55555671f660, 24 [pid 342] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 343] <... set_robust_list resumed>) = 0 [pid 342] <... openat resumed>) = 4 [pid 342] ioctl(4, LOOP_SET_FD, 3 [pid 343] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 342] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 343] <... prctl resumed>) = 0 [pid 342] ioctl(4, LOOP_CLR_FD [pid 343] setpgid(0, 0 [pid 342] <... ioctl resumed>) = 0 [pid 343] <... setpgid resumed>) = 0 [pid 343] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 341] <... munmap resumed>) = 0 [pid 341] openat(AT_FDCWD, "/dev/loop4", O_RDWR./strace-static-x86_64: Process 345 attached [pid 343] write(3, "1000", 4executing program [pid 345] set_robust_list(0x55555671f660, 24 [pid 343] <... write resumed>) = 4 [pid 342] ioctl(4, LOOP_SET_FD, 3 [pid 345] <... set_robust_list resumed>) = 0 [pid 343] close(3 [pid 342] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 345] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 343] <... close resumed>) = 0 [pid 342] close(4 [pid 345] <... prctl resumed>) = 0 [pid 343] write(1, "executing program\n", 18 [pid 342] <... close resumed>) = 0 [pid 343] <... write resumed>) = 18 [pid 345] setpgid(0, 0 [pid 342] close(3 [pid 341] <... openat resumed>) = 4 [pid 341] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 341] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 344 attached [pid 344] set_robust_list(0x55555671f660, 24) = 0 [pid 342] <... close resumed>) = 0 [pid 345] <... setpgid resumed>) = 0 [pid 343] memfd_create("syzkaller", 0 [pid 342] chdir("./file0" [pid 343] <... memfd_create resumed>) = 3 [pid 345] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 342] <... chdir resumed>) = 0 [pid 343] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 342] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 345] <... openat resumed>) = 3 [pid 345] write(3, "1000", 4 [pid 343] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 342] <... open resumed>) = 3 [pid 341] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 341] close(4) = 0 [pid 341] close(3) = 0 [pid 344] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 344] setpgid(0, 0) = 0 [pid 344] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 345] <... write resumed>) = 4 [pid 343] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 342] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 345] close(3 [pid 342] <... mount resumed>) = 0 [pid 345] <... close resumed>) = 0 [pid 342] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXECexecuting program [pid 345] write(1, "executing program\n", 18 [pid 342] <... open resumed>) = 4 [pid 345] <... write resumed>) = 18 [pid 345] memfd_create("syzkaller", 0 [pid 342] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 345] <... memfd_create resumed>) = 3 [pid 344] <... openat resumed>) = 3 [pid 341] chdir("./file0" [pid 345] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 342] <... mmap resumed>) = 0x20000000 [pid 345] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 342] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 341] <... chdir resumed>) = 0 [pid 341] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 344] write(3, "1000", 4) = 4 [pid 341] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 344] close(3) = 0 [pid 341] <... mount resumed>) = 0 [pid 344] write(1, "executing program\n", 18executing program ) = 18 [pid 344] memfd_create("syzkaller", 0 [pid 341] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 341] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 344] <... memfd_create resumed>) = 3 [pid 344] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 345] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 342] <... openat resumed>) = 5 [pid 342] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 342] exit_group(0) = ? [pid 342] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=342, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 341] <... mmap resumed>) = 0x20000000 [pid 344] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 346 attached , child_tidptr=0x55555671f650) = 346 [pid 341] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 341] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 341] exit_group(0) = ? [pid 346] set_robust_list(0x55555671f660, 24 [pid 341] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=341, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 345] <... write resumed>) = 1048576 [pid 346] <... set_robust_list resumed>) = 0 [pid 343] <... write resumed>) = 1048576 [pid 346] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 345] munmap(0x7f1ddd1fa000, 138412032 [pid 343] munmap(0x7f1ddd1fa000, 138412032 [pid 346] <... prctl resumed>) = 0 [pid 343] <... munmap resumed>) = 0 [pid 346] setpgid(0, 0 [pid 343] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 346] <... setpgid resumed>) = 0 [pid 345] <... munmap resumed>) = 0 [pid 346] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 345] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 343] <... openat resumed>) = 4 executing program [pid 346] <... openat resumed>) = 3 [pid 345] <... openat resumed>) = 4 [pid 343] ioctl(4, LOOP_SET_FD, 3 [pid 346] write(3, "1000", 4 [pid 345] ioctl(4, LOOP_SET_FD, 3 [pid 343] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 346] <... write resumed>) = 4 [pid 345] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 346] close(3 [pid 343] ioctl(4, LOOP_CLR_FD [pid 346] <... close resumed>) = 0 [pid 345] ioctl(4, LOOP_CLR_FD [pid 346] write(1, "executing program\n", 18 [pid 343] <... ioctl resumed>) = 0 [pid 346] <... write resumed>) = 18 [pid 345] <... ioctl resumed>) = 0 [pid 346] memfd_create("syzkaller", 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 346] <... memfd_create resumed>) = 3 [pid 346] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 348 [pid 344] <... write resumed>) = 1048576 [pid 344] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 344] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 344] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 344] ioctl(4, LOOP_CLR_FD) = 0 [pid 346] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 343] ioctl(4, LOOP_SET_FD, 3 [pid 345] ioctl(4, LOOP_SET_FD, 3 [pid 343] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 345] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 343] close(4 [pid 345] close(4) = 0 [pid 343] <... close resumed>) = 0 [pid 345] close(3 [pid 343] close(3./strace-static-x86_64: Process 348 attached [pid 348] set_robust_list(0x55555671f660, 24) = 0 [pid 348] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 344] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 344] close(4) = 0 [pid 343] <... close resumed>) = 0 [pid 344] close(3 [pid 345] <... close resumed>) = 0 [pid 343] chdir("./file0" [pid 348] setpgid(0, 0) = 0 [pid 348] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 343] <... chdir resumed>) = 0 [pid 345] chdir("./file0" [pid 343] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 345] <... chdir resumed>) = 0 [pid 343] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 345] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 343] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 345] <... open resumed>) = 3 [pid 343] <... open resumed>) = 4 [pid 345] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 343] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 348] <... openat resumed>) = 3 [pid 343] <... mmap resumed>) = 0x20000000 [pid 345] <... mount resumed>) = 0 [pid 343] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 348] write(3, "1000", 4) = 4 [pid 348] close(3) = 0 [pid 348] write(1, "executing program\n", 18executing program ) = 18 [pid 348] memfd_create("syzkaller", 0 [pid 344] <... close resumed>) = 0 [pid 348] <... memfd_create resumed>) = 3 [pid 348] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 344] chdir("./file0") = 0 [pid 344] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 345] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 343] <... openat resumed>) = 5 [pid 343] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 345] <... open resumed>) = 4 [pid 343] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 345] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 343] exit_group(0) = ? [pid 344] <... open resumed>) = 3 [pid 345] <... mmap resumed>) = 0x20000000 [pid 344] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 344] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 343] +++ exited with 0 +++ [pid 345] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=343, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 344] <... open resumed>) = 4 [pid 344] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 346] <... write resumed>) = 1048576 [pid 345] <... openat resumed>) = 5 [pid 346] munmap(0x7f1ddd1fa000, 138412032 [pid 345] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 346] <... munmap resumed>) = 0 [pid 345] exit_group(0) = ? [pid 346] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 345] +++ exited with 0 +++ [pid 346] <... openat resumed>) = 4 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=345, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 344] <... mmap resumed>) = 0x20000000 [pid 344] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 344] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 344] exit_group(0) = ? [pid 344] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=344, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 346] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 346] ioctl(4, LOOP_CLR_FD) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 296] close(3 [pid 295] close(3 [pid 298] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 346] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 351 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 349 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 350 [pid 346] close(4) = 0 [pid 346] close(3) = 0 [pid 346] chdir("./file0") = 0 [pid 346] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 349 attached ) = 3 [pid 349] set_robust_list(0x55555671f660, 24 [pid 346] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 349] <... set_robust_list resumed>) = 0 [pid 346] <... mount resumed>) = 0 [pid 349] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 346] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 349] <... prctl resumed>) = 0 [pid 346] <... open resumed>) = 4 [pid 349] setpgid(0, 0 [pid 346] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 348] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 349] <... setpgid resumed>) = 0 [pid 346] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 351 attached [pid 349] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 346] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 351] set_robust_list(0x55555671f660, 24 [pid 349] <... openat resumed>) = 3 [pid 346] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 351] <... set_robust_list resumed>) = 0 [pid 349] write(3, "1000", 4 [pid 346] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 351] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 349] <... write resumed>) = 4 [pid 346] exit_group(0 [pid 351] <... prctl resumed>) = 0 [pid 349] close(3 [pid 346] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 350 attached [pid 350] set_robust_list(0x55555671f660, 24) = 0 [pid 346] +++ exited with 0 +++ [pid 349] <... close resumed>) = 0 [pid 351] setpgid(0, 0 [pid 349] write(1, "executing program\n", 18 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=346, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 350] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 350] setpgid(0, 0) = 0 [pid 350] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 348] <... write resumed>) = 1048576 [pid 350] write(3, "1000", 4) = 4 [pid 350] close(3) = 0 [pid 350] write(1, "executing program\n", 18executing program ) = 18 [pid 350] memfd_create("syzkaller", 0) = 3 executing program [pid 351] <... setpgid resumed>) = 0 [pid 349] <... write resumed>) = 18 [pid 351] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 349] memfd_create("syzkaller", 0 [pid 351] <... openat resumed>) = 3 [pid 349] <... memfd_create resumed>) = 3 [pid 351] write(3, "1000", 4 [pid 349] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 351] <... write resumed>) = 4 [pid 349] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 351] close(3 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 352 [pid 350] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 349] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 351] <... close resumed>) = 0 [pid 351] write(1, "executing program\n", 18) = 18 executing program [pid 351] memfd_create("syzkaller", 0) = 3 [pid 351] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 348] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 350] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 348] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 348] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 348] ioctl(4, LOOP_CLR_FD) = 0 [pid 351] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 348] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 348] close(4) = 0 [pid 348] close(3 [pid 349] <... write resumed>) = 1048576 [pid 348] <... close resumed>) = 0 [pid 348] chdir("./file0") = 0 [pid 348] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 348] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 348] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 348] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 348] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 348] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 351] <... write resumed>) = 1048576 [pid 348] <... mount resumed>) = -1 ENOENT (No such file or directory) ./strace-static-x86_64: Process 352 attached [pid 348] exit_group(0) = ? [pid 348] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=348, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 350] <... write resumed>) = 1048576 [pid 350] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 350] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 350] ioctl(4, LOOP_SET_FD, 3 [pid 349] munmap(0x7f1ddd1fa000, 138412032 [pid 350] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 349] <... munmap resumed>) = 0 [pid 350] ioctl(4, LOOP_CLR_FD) = 0 [pid 349] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 349] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 350] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 350] close(4 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 352] set_robust_list(0x55555671f660, 24 [pid 351] munmap(0x7f1ddd1fa000, 138412032 [pid 352] <... set_robust_list resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 353 [pid 351] <... munmap resumed>) = 0 [pid 352] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 351] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 352] <... prctl resumed>) = 0 [pid 351] <... openat resumed>) = 4 [pid 352] setpgid(0, 0) = 0 [pid 351] ioctl(4, LOOP_SET_FD, 3 [pid 352] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 351] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 352] <... openat resumed>) = 3 [pid 351] ioctl(4, LOOP_CLR_FD [pid 352] write(3, "1000", 4) = 4 [pid 351] <... ioctl resumed>) = 0 [pid 352] close(3) = 0 executing program [pid 352] write(1, "executing program\n", 18) = 18 [pid 352] memfd_create("syzkaller", 0) = 3 [pid 352] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0./strace-static-x86_64: Process 353 attached [pid 351] ioctl(4, LOOP_SET_FD, 3 [pid 352] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 351] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 350] <... close resumed>) = 0 [pid 350] close(3 [pid 351] close(4) = 0 [pid 351] close(3 [pid 349] ioctl(4, LOOP_CLR_FD) = 0 [pid 350] <... close resumed>) = 0 [pid 350] chdir("./file0" [pid 349] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 351] <... close resumed>) = 0 [pid 349] close(4) = 0 [pid 349] close(3 [pid 352] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 351] chdir("./file0" [pid 353] set_robust_list(0x55555671f660, 24 [pid 351] <... chdir resumed>) = 0 [pid 351] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 351] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 353] <... set_robust_list resumed>) = 0 [pid 351] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 351] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 350] <... chdir resumed>) = 0 [pid 350] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 351] <... mmap resumed>) = 0x20000000 [pid 353] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 351] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 353] <... prctl resumed>) = 0 [pid 351] <... openat resumed>) = 5 [pid 353] setpgid(0, 0 [pid 351] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 353] <... setpgid resumed>) = 0 [pid 351] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 351] exit_group(0 [pid 353] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 351] <... exit_group resumed>) = ? [pid 350] <... open resumed>) = 3 [pid 350] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 351] +++ exited with 0 +++ [pid 353] <... openat resumed>) = 3 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=351, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 350] <... mount resumed>) = 0 [pid 350] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 350] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 349] <... close resumed>) = 0 [pid 349] chdir("./file0" [pid 352] <... write resumed>) = 1048576 [pid 353] write(3, "1000", 4 [pid 349] <... chdir resumed>) = 0 [pid 349] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 349] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 349] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 349] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 350] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 354 [pid 350] <... openat resumed>) = 5 [pid 350] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 349] <... mmap resumed>) = 0x20000000 [pid 350] exit_group(0) = ? [pid 353] <... write resumed>) = 4 [pid 352] munmap(0x7f1ddd1fa000, 138412032 [pid 353] close(3 [pid 352] <... munmap resumed>) = 0 [pid 353] <... close resumed>) = 0 [pid 352] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 353] write(1, "executing program\n", 18executing program [pid 352] <... openat resumed>) = 4 [pid 353] <... write resumed>) = 18 [pid 352] ioctl(4, LOOP_SET_FD, 3 [pid 353] memfd_create("syzkaller", 0 [pid 352] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 353] <... memfd_create resumed>) = 3 [pid 352] ioctl(4, LOOP_CLR_FD [pid 353] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 352] <... ioctl resumed>) = 0 [pid 353] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 349] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 350] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=350, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 349] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 349] exit_group(0) = ? [pid 349] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=349, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 354 attached [pid 354] set_robust_list(0x55555671f660, 24) = 0 [pid 354] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 353] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 296] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 295] close(3 [pid 296] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 352] ioctl(4, LOOP_SET_FD, 3 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 355 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 356 [pid 352] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 352] close(4) = 0 [pid 352] close(3 [pid 354] <... prctl resumed>) = 0 [pid 354] setpgid(0, 0) = 0 [pid 354] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 354] write(3, "1000", 4) = 4 executing program [pid 354] close(3) = 0 [pid 354] write(1, "executing program\n", 18 [pid 352] <... close resumed>) = 0 [pid 352] chdir("./file0" [pid 354] <... write resumed>) = 18 [pid 352] <... chdir resumed>) = 0 [pid 352] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 354] memfd_create("syzkaller", 0 [pid 352] <... open resumed>) = 3 [pid 352] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 354] <... memfd_create resumed>) = 3 [pid 352] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 354] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 352] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 354] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 352] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 355 attached [pid 355] set_robust_list(0x55555671f660, 24) = 0 [pid 355] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 355] setpgid(0, 0) = 0 [pid 355] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 355] write(3, "1000", 4) = 4 [pid 355] close(3) = 0 [pid 352] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 355] write(1, "executing program\n", 18 [pid 352] <... openat resumed>) = 5 [pid 352] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 352] exit_group(0) = ? executing program [pid 355] <... write resumed>) = 18 [pid 355] memfd_create("syzkaller", 0 [pid 352] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=352, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 355] <... memfd_create resumed>) = 3 [pid 355] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 353] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 356 attached [pid 353] munmap(0x7f1ddd1fa000, 138412032 [pid 356] set_robust_list(0x55555671f660, 24) = 0 [pid 353] <... munmap resumed>) = 0 [pid 356] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 353] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 356] <... prctl resumed>) = 0 [pid 356] setpgid(0, 0 [pid 355] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 353] <... openat resumed>) = 4 [pid 356] <... setpgid resumed>) = 0 [pid 353] ioctl(4, LOOP_SET_FD, 3 [pid 356] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 353] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program [pid 356] <... openat resumed>) = 3 [pid 353] ioctl(4, LOOP_CLR_FD [pid 356] write(3, "1000", 4 [pid 297] <... restart_syscall resumed>) = 0 [pid 353] <... ioctl resumed>) = 0 [pid 356] <... write resumed>) = 4 [pid 356] close(3) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 356] write(1, "executing program\n", 18 [pid 297] <... openat resumed>) = 3 [pid 356] <... write resumed>) = 18 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3 [pid 356] memfd_create("syzkaller", 0 [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 356] <... memfd_create resumed>) = 3 [pid 356] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 357 [pid 356] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 353] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 353] close(4) = 0 [pid 353] close(3) = 0 [pid 353] chdir("./file0") = 0 [pid 353] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 353] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 353] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 353] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 354] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 353] <... mmap resumed>) = 0x20000000 [pid 356] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 353] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 355] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 356] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 357 attached [pid 353] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 356] munmap(0x7f1ddd1fa000, 138412032 [pid 353] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 357] set_robust_list(0x55555671f660, 24 [pid 353] exit_group(0 [pid 357] <... set_robust_list resumed>) = 0 [pid 356] <... munmap resumed>) = 0 [pid 353] <... exit_group resumed>) = ? [pid 357] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 354] <... write resumed>) = 1048576 [pid 353] +++ exited with 0 +++ [pid 357] <... prctl resumed>) = 0 [pid 356] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 357] setpgid(0, 0) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=353, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 356] <... openat resumed>) = 4 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 357] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 356] ioctl(4, LOOP_SET_FD, 3executing program [pid 357] <... openat resumed>) = 3 [pid 356] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 357] write(3, "1000", 4) = 4 [pid 356] ioctl(4, LOOP_CLR_FD [pid 357] close(3) = 0 [pid 357] write(1, "executing program\n", 18 [pid 356] <... ioctl resumed>) = 0 [pid 357] <... write resumed>) = 18 [pid 357] memfd_create("syzkaller", 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 357] <... memfd_create resumed>) = 3 [pid 357] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 358 [pid 354] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 354] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 354] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 354] ioctl(4, LOOP_CLR_FD) = 0 [pid 357] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 356] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 356] close(4) = 0 [pid 356] close(3 [pid 354] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 354] close(4) = 0 [pid 354] close(3 [pid 356] <... close resumed>) = 0 [pid 354] <... close resumed>) = 0 [pid 355] <... write resumed>) = 1048576 [pid 355] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 354] chdir("./file0" [pid 356] chdir("./file0"./strace-static-x86_64: Process 358 attached ) = 0 [pid 358] set_robust_list(0x55555671f660, 24 [pid 356] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 358] <... set_robust_list resumed>) = 0 [pid 356] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 358] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 356] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 358] <... prctl resumed>) = 0 [pid 356] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 358] setpgid(0, 0 [pid 354] <... chdir resumed>) = 0 [pid 354] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 358] <... setpgid resumed>) = 0 [pid 356] <... mmap resumed>) = 0x20000000 [pid 354] <... open resumed>) = 3 [pid 355] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 354] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 355] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 355] ioctl(4, LOOP_CLR_FD) = 0 [pid 354] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 357] <... write resumed>) = 1048576 [pid 356] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 358] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 356] <... openat resumed>) = 5 [pid 358] <... openat resumed>) = 3 [pid 356] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 358] write(3, "1000", 4 [pid 356] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 356] exit_group(0 [pid 358] <... write resumed>) = 4 [pid 356] <... exit_group resumed>) = ? [pid 355] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 355] close(4 [pid 356] +++ exited with 0 +++ [pid 358] close(3 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=356, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 354] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 355] <... close resumed>) = 0 [pid 355] close(3 [pid 354] <... mmap resumed>) = 0x20000000 [pid 354] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 359 [pid 354] <... openat resumed>) = 5 [pid 354] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 354] exit_group(0) = ? [pid 358] <... close resumed>) = 0 [pid 357] munmap(0x7f1ddd1fa000, 138412032 [pid 358] write(1, "executing program\n", 18executing program ) = 18 [pid 358] memfd_create("syzkaller", 0) = 3 [pid 358] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 355] <... close resumed>) = 0 [pid 354] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=354, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 355] chdir("./file0") = 0 [pid 355] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 355] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 355] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 355] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 357] <... munmap resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 360 [pid 355] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 359 attached [pid 359] set_robust_list(0x55555671f660, 24) = 0 [pid 359] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 355] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 359] <... prctl resumed>) = 0 [pid 359] setpgid(0, 0) = 0 [pid 355] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 359] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 355] exit_group(0) = ? [pid 359] <... openat resumed>) = 3 [pid 359] write(3, "1000", 4) = 4 [pid 359] close(3) = 0 executing program [pid 359] write(1, "executing program\n", 18) = 18 [pid 359] memfd_create("syzkaller", 0) = 3 [pid 359] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 357] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 358] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 357] <... openat resumed>) = 4 [pid 355] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=355, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 361 [pid 358] <... write resumed>) = 1048576 [pid 357] ioctl(4, LOOP_SET_FD, 3 [pid 358] munmap(0x7f1ddd1fa000, 138412032 [pid 357] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 357] ioctl(4, LOOP_CLR_FD) = 0 [pid 358] <... munmap resumed>) = 0 [pid 358] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 358] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 358] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 360 attached [pid 357] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 357] close(4) = 0 [pid 357] close(3 [pid 360] set_robust_list(0x55555671f660, 24) = 0 [pid 360] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 360] setpgid(0, 0) = 0 [pid 360] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 357] <... close resumed>) = 0 [pid 357] chdir("./file0" [pid 358] ioctl(4, LOOP_SET_FD, 3 [pid 357] <... chdir resumed>) = 0 [pid 358] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 357] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 358] close(4 [pid 357] <... open resumed>) = 3 [pid 358] <... close resumed>) = 0 [pid 357] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 358] close(3 [pid 357] <... mount resumed>) = 0 [pid 360] <... openat resumed>) = 3 executing program [pid 360] write(3, "1000", 4) = 4 [pid 357] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 360] close(3) = 0 [pid 360] write(1, "executing program\n", 18) = 18 [pid 360] memfd_create("syzkaller", 0) = 3 [pid 358] <... close resumed>) = 0 [pid 360] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 357] <... open resumed>) = 4 [pid 358] chdir("./file0" [pid 357] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 360] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 357] <... mmap resumed>) = 0x20000000 [pid 358] <... chdir resumed>) = 0 [pid 357] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 358] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 357] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 358] <... open resumed>) = 3 [pid 358] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 357] exit_group(0) = ? [pid 358] <... mount resumed>) = 0 ./strace-static-x86_64: Process 361 attached [pid 361] set_robust_list(0x55555671f660, 24) = 0 [pid 361] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 357] +++ exited with 0 +++ [pid 358] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=357, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 361] <... prctl resumed>) = 0 [pid 361] setpgid(0, 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 362 ./strace-static-x86_64: Process 362 attached [pid 358] <... open resumed>) = 4 [pid 361] <... setpgid resumed>) = 0 [pid 362] set_robust_list(0x55555671f660, 24 [pid 358] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 362] <... set_robust_list resumed>) = 0 [pid 361] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 362] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 358] <... mmap resumed>) = 0x20000000 [pid 362] <... prctl resumed>) = 0 [pid 358] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 362] setpgid(0, 0 [pid 358] <... openat resumed>) = 5 [pid 362] <... setpgid resumed>) = 0 [pid 358] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 362] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 358] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 362] <... openat resumed>) = 3 [pid 358] exit_group(0 [pid 362] write(3, "1000", 4 [pid 358] <... exit_group resumed>) = ? [pid 362] <... write resumed>) = 4 [pid 358] +++ exited with 0 +++ [pid 362] close(3 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=358, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 362] <... close resumed>) = 0 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 361] <... openat resumed>) = 3 executing program [pid 362] write(1, "executing program\n", 18) = 18 [pid 362] memfd_create("syzkaller", 0 [pid 361] write(3, "1000", 4 [pid 362] <... memfd_create resumed>) = 3 [pid 361] <... write resumed>) = 4 [pid 362] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 361] close(3 [pid 362] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 361] <... close resumed>) = 0 [pid 360] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 359] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576executing program [pid 361] write(1, "executing program\n", 18) = 18 [pid 299] <... restart_syscall resumed>) = 0 [pid 361] memfd_create("syzkaller", 0) = 3 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 362] <... write resumed>) = 1048576 [pid 362] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... openat resumed>) = 3 [pid 361] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 299] ioctl(3, LOOP_CLR_FD [pid 361] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 362] <... munmap resumed>) = 0 [pid 362] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... ioctl resumed>) = 0 [pid 362] <... openat resumed>) = 4 [pid 362] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 362] ioctl(4, LOOP_CLR_FD) = 0 [pid 361] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 299] close(3 [pid 362] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 362] close(4) = 0 [pid 362] close(3 [pid 299] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 363 [pid 362] <... close resumed>) = 0 [pid 362] chdir("./file0") = 0 [pid 362] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 362] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 362] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 362] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 363 attached [pid 363] set_robust_list(0x55555671f660, 24 [pid 359] <... write resumed>) = 1048576 [pid 363] <... set_robust_list resumed>) = 0 executing program [pid 363] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 363] setpgid(0, 0) = 0 [pid 363] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 363] write(3, "1000", 4) = 4 [pid 363] close(3) = 0 [pid 363] write(1, "executing program\n", 18) = 18 [pid 363] memfd_create("syzkaller", 0) = 3 [pid 363] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 362] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 360] <... write resumed>) = 1048576 [pid 362] <... openat resumed>) = 5 [pid 362] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 362] exit_group(0) = ? [pid 359] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 362] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=362, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 359] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 359] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 364 [pid 359] ioctl(4, LOOP_CLR_FD [pid 360] munmap(0x7f1ddd1fa000, 138412032 [pid 359] <... ioctl resumed>) = 0 [pid 360] <... munmap resumed>) = 0 [pid 360] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 360] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 360] ioctl(4, LOOP_CLR_FD [pid 359] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 360] <... ioctl resumed>) = 0 [pid 359] close(4) = 0 [pid 359] close(3 [pid 363] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 359] <... close resumed>) = 0 ./strace-static-x86_64: Process 364 attached [pid 364] set_robust_list(0x55555671f660, 24) = 0 [pid 364] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 364] setpgid(0, 0) = 0 [pid 364] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 359] chdir("./file0" [pid 364] <... openat resumed>) = 3 [pid 364] write(3, "1000", 4) = 4 [pid 359] <... chdir resumed>) = 0 [pid 364] close(3) = 0 executing program [pid 364] write(1, "executing program\n", 18) = 18 [pid 364] memfd_create("syzkaller", 0 [pid 359] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 364] <... memfd_create resumed>) = 3 [pid 364] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 360] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 360] close(4) = 0 [pid 359] <... open resumed>) = 3 [pid 360] close(3) = 0 [pid 359] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 361] <... write resumed>) = 1048576 [pid 359] <... mount resumed>) = 0 [pid 359] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 360] chdir("./file0" [pid 361] munmap(0x7f1ddd1fa000, 138412032 [pid 359] <... open resumed>) = 4 [pid 360] <... chdir resumed>) = 0 [pid 359] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 360] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 361] <... munmap resumed>) = 0 [pid 359] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 360] <... open resumed>) = 3 [pid 359] <... openat resumed>) = 5 [pid 360] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 361] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 359] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 359] exit_group(0) = ? [pid 360] <... mount resumed>) = 0 [pid 359] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=359, si_uid=0, si_status=0, si_utime=2, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 360] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 365 [pid 360] <... open resumed>) = 4 [pid 361] <... openat resumed>) = 4 [pid 363] <... write resumed>) = 1048576 [pid 360] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 361] ioctl(4, LOOP_SET_FD, 3 [pid 363] munmap(0x7f1ddd1fa000, 138412032 [pid 360] <... mmap resumed>) = 0x20000000 [pid 361] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 361] ioctl(4, LOOP_CLR_FD) = 0 [pid 360] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 363] <... munmap resumed>) = 0 [pid 360] <... openat resumed>) = 5 [pid 363] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 360] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 363] <... openat resumed>) = 4 [pid 360] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 363] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 365 attached [pid 360] exit_group(0 [pid 363] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 361] ioctl(4, LOOP_SET_FD, 3 [pid 360] <... exit_group resumed>) = ? [pid 361] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 360] +++ exited with 0 +++ [pid 361] close(4 [pid 363] ioctl(4, LOOP_CLR_FD [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=360, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 365] set_robust_list(0x55555671f660, 24) = 0 [pid 365] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 361] <... close resumed>) = 0 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 361] close(3 [pid 365] <... prctl resumed>) = 0 [pid 365] setpgid(0, 0) = 0 [pid 365] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 364] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 365] <... openat resumed>) = 3 executing program [pid 298] <... restart_syscall resumed>) = 0 [pid 365] write(3, "1000", 4) = 4 [pid 365] close(3) = 0 [pid 365] write(1, "executing program\n", 18) = 18 [pid 365] memfd_create("syzkaller", 0 [pid 361] <... close resumed>) = 0 [pid 365] <... memfd_create resumed>) = 3 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 363] <... ioctl resumed>) = 0 [pid 365] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 361] chdir("./file0" [pid 298] close(3 [pid 361] <... chdir resumed>) = 0 [pid 361] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 363] ioctl(4, LOOP_SET_FD, 3 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 366 [pid 361] <... open resumed>) = 3 [pid 363] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 363] close(4 [pid 361] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 363] <... close resumed>) = 0 [pid 361] <... mount resumed>) = 0 [pid 363] close(3 [pid 364] <... write resumed>) = 1048576 [pid 363] <... close resumed>) = 0 [pid 361] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 364] munmap(0x7f1ddd1fa000, 138412032 [pid 361] <... open resumed>) = 4 [pid 363] chdir("./file0" [pid 364] <... munmap resumed>) = 0 [pid 364] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 364] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 364] ioctl(4, LOOP_CLR_FD) = 0 [pid 361] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 363] <... chdir resumed>) = 0 ./strace-static-x86_64: Process 366 attached [pid 366] set_robust_list(0x55555671f660, 24) = 0 [pid 366] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 361] <... mmap resumed>) = 0x20000000 [pid 363] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 364] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 364] close(4) = 0 [pid 364] close(3 [pid 363] <... open resumed>) = 3 [pid 361] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 363] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 366] <... prctl resumed>) = 0 [pid 366] setpgid(0, 0) = 0 [pid 363] <... mount resumed>) = 0 [pid 361] <... openat resumed>) = 5 [pid 363] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 366] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 363] <... open resumed>) = 4 [pid 361] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 363] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 361] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 366] <... openat resumed>) = 3 [pid 366] write(3, "1000", 4) = 4 executing program [pid 366] close(3) = 0 [pid 366] write(1, "executing program\n", 18) = 18 [pid 366] memfd_create("syzkaller", 0 [pid 361] exit_group(0 [pid 363] <... mmap resumed>) = 0x20000000 [pid 361] <... exit_group resumed>) = ? [pid 366] <... memfd_create resumed>) = 3 [pid 366] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 361] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=361, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 363] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 363] <... openat resumed>) = 5 [pid 365] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 364] <... close resumed>) = 0 [pid 365] <... write resumed>) = 1048576 [pid 364] chdir("./file0") = 0 [pid 364] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 363] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 296] <... restart_syscall resumed>) = 0 [pid 363] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 364] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 364] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 363] exit_group(0 [pid 296] <... openat resumed>) = 3 [pid 363] <... exit_group resumed>) = ? [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3 [pid 364] <... open resumed>) = 4 [pid 296] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 364] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 367 [pid 364] <... mmap resumed>) = 0x20000000 [pid 363] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=363, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 367 attached [pid 367] set_robust_list(0x55555671f660, 24 [pid 364] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 367] <... set_robust_list resumed>) = 0 [pid 364] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 364] exit_group(0) = ? [pid 367] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 367] setpgid(0, 0) = 0 [pid 367] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 367] write(3, "1000", 4) = 4 [pid 367] close(3) = 0 [pid 364] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=364, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 367] write(1, "executing program\n", 18executing program ) = 18 [pid 367] memfd_create("syzkaller", 0) = 3 [pid 367] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 365] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 366] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 365] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 365] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 365] ioctl(4, LOOP_CLR_FD) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 299] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 299] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 299] close(3 [pid 297] <... close resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 365] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 365] close(4) = 0 [pid 365] close(3 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 368 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 369 [pid 366] <... write resumed>) = 1048576 [pid 365] <... close resumed>) = 0 [pid 365] chdir("./file0") = 0 [pid 365] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 365] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 365] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 365] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 368 attached [pid 368] set_robust_list(0x55555671f660, 24) = 0 [pid 368] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 365] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 368] <... prctl resumed>) = 0 [pid 368] setpgid(0, 0 [pid 365] <... openat resumed>) = 5 [pid 368] <... setpgid resumed>) = 0 [pid 368] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 365] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 368] <... openat resumed>) = 3 [pid 365] exit_group(0) = ? [pid 365] +++ exited with 0 +++ [pid 368] write(3, "1000", 4 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=365, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 368] <... write resumed>) = 4 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 368] close(3executing program [pid 295] <... restart_syscall resumed>) = 0 [pid 368] <... close resumed>) = 0 [pid 368] write(1, "executing program\n", 18) = 18 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 368] memfd_create("syzkaller", 0 [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 368] <... memfd_create resumed>) = 3 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 368] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 370 [pid 366] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 369 attached ) = 0 [pid 366] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 366] ioctl(4, LOOP_SET_FD, 3 [pid 369] set_robust_list(0x55555671f660, 24 [pid 366] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 366] ioctl(4, LOOP_CLR_FD) = 0 [pid 369] <... set_robust_list resumed>) = 0 [pid 368] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 366] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 366] close(4) = 0 [pid 366] close(3 [pid 369] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 367] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 370 attached [pid 370] set_robust_list(0x55555671f660, 24) = 0 [pid 370] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 370] setpgid(0, 0 [pid 369] <... prctl resumed>) = 0 [pid 370] <... setpgid resumed>) = 0 [pid 370] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 369] setpgid(0, 0 [pid 370] <... openat resumed>) = 3 [pid 369] <... setpgid resumed>) = 0 [pid 370] write(3, "1000", 4) = 4 [pid 370] close(3) = 0 executing program [pid 366] <... close resumed>) = 0 [pid 369] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 370] write(1, "executing program\n", 18) = 18 [pid 370] memfd_create("syzkaller", 0) = 3 [pid 370] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 366] chdir("./file0") = 0 [pid 366] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 369] <... openat resumed>) = 3 [pid 366] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 369] write(3, "1000", 4 [pid 366] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 369] <... write resumed>) = 4 [pid 366] <... open resumed>) = 4 [pid 366] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 369] close(3) = 0 executing program [pid 369] write(1, "executing program\n", 18) = 18 [pid 369] memfd_create("syzkaller", 0) = 3 [pid 369] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 366] <... mmap resumed>) = 0x20000000 [pid 367] <... write resumed>) = 1048576 [pid 369] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 366] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 366] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 366] exit_group(0) = ? [pid 366] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=366, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 371 [pid 368] <... write resumed>) = 1048576 [pid 370] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 369] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 367] munmap(0x7f1ddd1fa000, 138412032 [pid 368] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 368] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 368] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 368] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 371 attached [pid 371] set_robust_list(0x55555671f660, 24) = 0 [pid 371] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 371] setpgid(0, 0) = 0 [pid 371] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 371] write(3, "1000", 4) = 4 [pid 367] <... munmap resumed>) = 0 [pid 368] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 368] close(4) = 0 [pid 368] close(3 [pid 367] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 367] ioctl(4, LOOP_SET_FD, 3 [pid 371] close(3) = 0 [pid 371] write(1, "executing program\n", 18executing program ) = 18 [pid 371] memfd_create("syzkaller", 0 [pid 367] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 371] <... memfd_create resumed>) = 3 [pid 367] ioctl(4, LOOP_CLR_FD [pid 371] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 367] <... ioctl resumed>) = 0 [pid 368] <... close resumed>) = 0 [pid 370] <... write resumed>) = 1048576 [pid 368] chdir("./file0") = 0 [pid 368] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 370] munmap(0x7f1ddd1fa000, 138412032 [pid 368] <... open resumed>) = 3 [pid 368] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 370] <... munmap resumed>) = 0 [pid 370] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 368] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 370] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 370] ioctl(4, LOOP_CLR_FD [pid 368] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 370] <... ioctl resumed>) = 0 [pid 367] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 367] close(4) = 0 [pid 370] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 370] close(4) = 0 [pid 370] close(3 [pid 367] close(3 [pid 368] <... mmap resumed>) = 0x20000000 [pid 367] <... close resumed>) = 0 [pid 368] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 368] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 368] exit_group(0) = ? [pid 367] chdir("./file0" [pid 369] <... write resumed>) = 1048576 [pid 367] <... chdir resumed>) = 0 [pid 369] munmap(0x7f1ddd1fa000, 138412032 [pid 367] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 368] +++ exited with 0 +++ [pid 367] <... open resumed>) = 3 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=368, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 367] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 369] <... munmap resumed>) = 0 [pid 367] <... mount resumed>) = 0 [pid 369] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 367] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 370] <... close resumed>) = 0 [pid 367] <... open resumed>) = 4 [pid 369] <... openat resumed>) = 4 [pid 370] chdir("./file0" [pid 367] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 370] <... chdir resumed>) = 0 [pid 370] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 371] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 370] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 367] <... mmap resumed>) = 0x20000000 [pid 370] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 370] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 369] ioctl(4, LOOP_SET_FD, 3 [pid 367] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 370] <... mmap resumed>) = 0x20000000 [pid 297] <... restart_syscall resumed>) = 0 [pid 370] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 367] <... openat resumed>) = 5 [pid 297] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 367] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 297] <... close resumed>) = 0 [pid 367] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 370] <... openat resumed>) = 5 [pid 370] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 370] exit_group(0) = ? [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 372 [pid 367] exit_group(0) = ? [pid 369] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 370] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=370, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 367] +++ exited with 0 +++ [pid 369] ioctl(4, LOOP_CLR_FD [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=367, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 369] <... ioctl resumed>) = 0 [pid 369] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 372 attached [pid 372] set_robust_list(0x55555671f660, 24) = 0 [pid 372] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 372] setpgid(0, 0) = 0 [pid 372] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 372] write(3, "1000", 4) = 4 executing program [pid 372] close(3) = 0 [pid 372] write(1, "executing program\n", 18) = 18 [pid 372] memfd_create("syzkaller", 0 [pid 369] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 369] close(4 [pid 372] <... memfd_create resumed>) = 3 [pid 372] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 371] <... write resumed>) = 1048576 [pid 369] <... close resumed>) = 0 [pid 369] close(3 [pid 371] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 369] <... close resumed>) = 0 [pid 371] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 371] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 371] ioctl(4, LOOP_CLR_FD) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] <... openat resumed>) = 3 [pid 296] <... ioctl resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 296] close(3 [pid 295] <... ioctl resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 295] close(3 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... close resumed>) = 0 [pid 371] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 371] close(4) = 0 [pid 371] close(3 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 373 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 374 [pid 369] chdir("./file0"executing program executing program ) = 0 [pid 371] <... close resumed>) = 0 [pid 371] chdir("./file0") = 0 [pid 371] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 371] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 371] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 371] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 371] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 372] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 371] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 371] exit_group(0) = ? [pid 371] +++ exited with 0 +++ ./strace-static-x86_64: Process 373 attached [pid 373] set_robust_list(0x55555671f660, 24./strace-static-x86_64: Process 374 attached ) = 0 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=371, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 373] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 374] set_robust_list(0x55555671f660, 24) = 0 [pid 374] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 373] <... prctl resumed>) = 0 [pid 373] setpgid(0, 0) = 0 [pid 373] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 374] <... prctl resumed>) = 0 [pid 374] setpgid(0, 0) = 0 [pid 374] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 373] <... openat resumed>) = 3 [pid 374] <... openat resumed>) = 3 [pid 373] write(3, "1000", 4) = 4 [pid 373] close(3) = 0 [pid 374] write(3, "1000", 4 [pid 373] write(1, "executing program\n", 18 [pid 374] <... write resumed>) = 4 [pid 373] <... write resumed>) = 18 [pid 374] close(3 [pid 373] memfd_create("syzkaller", 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 374] <... close resumed>) = 0 [pid 374] write(1, "executing program\n", 18) = 18 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 374] memfd_create("syzkaller", 0 [pid 373] <... memfd_create resumed>) = 3 [pid 374] <... memfd_create resumed>) = 3 [pid 373] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 374] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 375 [pid 369] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 375 attached ) = 3 [pid 369] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 375] set_robust_list(0x55555671f660, 24 [pid 369] <... mount resumed>) = 0 [pid 375] <... set_robust_list resumed>) = 0 [pid 369] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 369] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 369] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 375] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 369] <... openat resumed>) = 5 [pid 375] <... prctl resumed>) = 0 [pid 369] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 375] setpgid(0, 0 [pid 369] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 375] <... setpgid resumed>) = 0 [pid 369] exit_group(0 [pid 375] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 369] <... exit_group resumed>) = ? [pid 369] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=369, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 375] <... openat resumed>) = 3 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 375] write(3, "1000", 4 [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 376 [pid 375] <... write resumed>) = 4 [pid 375] close(3) = 0 [pid 375] write(1, "executing program\n", 18executing program ) = 18 [pid 375] memfd_create("syzkaller", 0) = 3 [pid 375] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 374] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 372] <... write resumed>) = 1048576 [pid 373] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 376 attached [pid 376] set_robust_list(0x55555671f660, 24) = 0 [pid 376] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 376] setpgid(0, 0) = 0 [pid 376] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 376] write(3, "1000", 4executing program ) = 4 [pid 376] close(3) = 0 [pid 376] write(1, "executing program\n", 18) = 18 [pid 376] memfd_create("syzkaller", 0) = 3 [pid 376] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 372] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 372] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 372] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 372] ioctl(4, LOOP_CLR_FD) = 0 [pid 376] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 372] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 372] close(4) = 0 [pid 372] close(3 [pid 375] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 372] <... close resumed>) = 0 [pid 375] <... write resumed>) = 1048576 [pid 372] chdir("./file0") = 0 [pid 372] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 375] munmap(0x7f1ddd1fa000, 138412032 [pid 372] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 375] <... munmap resumed>) = 0 [pid 372] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 372] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 375] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 375] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 375] ioctl(4, LOOP_CLR_FD) = 0 [pid 374] <... write resumed>) = 1048576 [pid 372] <... mmap resumed>) = 0x20000000 [pid 375] ioctl(4, LOOP_SET_FD, 3 [pid 372] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 372] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 372] exit_group(0) = ? [pid 375] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 375] close(4) = 0 [pid 375] close(3 [pid 373] <... write resumed>) = 1048576 [pid 372] +++ exited with 0 +++ [pid 373] munmap(0x7f1ddd1fa000, 138412032 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=372, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 374] munmap(0x7f1ddd1fa000, 138412032 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 373] <... munmap resumed>) = 0 [pid 373] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 374] <... munmap resumed>) = 0 [pid 373] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 373] ioctl(4, LOOP_CLR_FD) = 0 [pid 374] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 374] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 374] ioctl(4, LOOP_CLR_FD) = 0 [pid 375] <... close resumed>) = 0 [pid 373] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 373] close(4) = 0 [pid 373] close(3 [pid 375] chdir("./file0" [pid 374] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 374] close(4) = 0 [pid 374] close(3 [pid 375] <... chdir resumed>) = 0 [pid 375] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 375] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 375] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 375] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 377 [pid 374] <... close resumed>) = 0 [pid 373] <... close resumed>) = 0 [pid 373] chdir("./file0") = 0 [pid 373] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 374] chdir("./file0") = 0 [pid 374] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 373] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 376] <... write resumed>) = 1048576 [pid 373] <... mount resumed>) = 0 [pid 374] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 373] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 374] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 373] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 374] <... open resumed>) = 4 [pid 373] <... mmap resumed>) = 0x20000000 [pid 374] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 374] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 373] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 374] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 373] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 374] exit_group(0 [pid 373] exit_group(0 [pid 374] <... exit_group resumed>) = ? [pid 374] +++ exited with 0 +++ [pid 373] <... exit_group resumed>) = ? [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=374, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 375] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 376] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 375] <... openat resumed>) = 5 [pid 375] mount(NULL, 0x20002ac0, NULL, 0, NULL./strace-static-x86_64: Process 377 attached [pid 376] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 375] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 377] set_robust_list(0x55555671f660, 24 [pid 376] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 376] ioctl(4, LOOP_CLR_FD) = 0 [pid 375] exit_group(0 [pid 377] <... set_robust_list resumed>) = 0 [pid 375] <... exit_group resumed>) = ? [pid 373] +++ exited with 0 +++ [pid 377] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=373, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] <... restart_syscall resumed>) = 0 [pid 375] +++ exited with 0 +++ [pid 377] <... prctl resumed>) = 0 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=375, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 377] setpgid(0, 0) = 0 [pid 296] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 295] close(3 [pid 296] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 377] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 379 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 378 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 376] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 376] close(4 [pid 377] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 376] <... close resumed>) = 0 [pid 376] close(3 [pid 377] write(3, "1000", 4 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 377] <... write resumed>) = 4 [pid 377] close(3 [pid 298] close(3) = 0 [pid 377] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 377] write(1, "executing program\n", 18executing program ) = 18 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 380 [pid 377] memfd_create("syzkaller", 0) = 3 [pid 376] <... close resumed>) = 0 [pid 376] chdir("./file0") = 0 [pid 376] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 376] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 377] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 376] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 376] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 377] <... mmap resumed>) = 0x7f1ddd1fa000 executing program [pid 376] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 378 attached [pid 378] set_robust_list(0x55555671f660, 24) = 0 [pid 378] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 376] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 378] <... prctl resumed>) = 0 [pid 378] setpgid(0, 0) = 0 [pid 378] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 376] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 376] exit_group(0 [pid 378] <... openat resumed>) = 3 [pid 376] <... exit_group resumed>) = ? [pid 376] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=376, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 378] write(3, "1000", 4) = 4 [pid 378] close(3) = 0 [pid 378] write(1, "executing program\n", 18) = 18 [pid 378] memfd_create("syzkaller", 0) = 3 [pid 378] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 381 ./strace-static-x86_64: Process 380 attached [pid 380] set_robust_list(0x55555671f660, 24) = 0 [pid 377] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 380] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 380] setpgid(0, 0) = 0 [pid 380] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 380] write(3, "1000", 4) = 4 [pid 380] close(3) = 0 [pid 380] write(1, "executing program\n", 18executing program ) = 18 [pid 380] memfd_create("syzkaller", 0) = 3 [pid 380] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 377] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 381 attached [pid 381] set_robust_list(0x55555671f660, 24) = 0 [pid 381] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 381] setpgid(0, 0) = 0 [pid 381] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 379 attached ) = 3 [pid 381] write(3, "1000", 4) = 4 [pid 381] close(3) = 0 executing program [pid 381] write(1, "executing program\n", 18) = 18 [pid 381] memfd_create("syzkaller", 0) = 3 [pid 381] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 379] set_robust_list(0x55555671f660, 24) = 0 [pid 381] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 379] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 379] setpgid(0, 0) = 0 [pid 379] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 379] write(3, "1000", 4) = 4 [pid 379] close(3) = 0 [pid 379] write(1, "executing program\n", 18executing program ) = 18 [pid 379] memfd_create("syzkaller", 0) = 3 [pid 378] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 379] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 377] munmap(0x7f1ddd1fa000, 138412032 [pid 379] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 380] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 377] <... munmap resumed>) = 0 [pid 377] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 377] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 377] ioctl(4, LOOP_CLR_FD) = 0 [pid 378] <... write resumed>) = 1048576 [pid 381] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 377] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 377] close(4) = 0 [pid 377] close(3) = 0 [pid 378] munmap(0x7f1ddd1fa000, 138412032 [pid 377] chdir("./file0") = 0 [pid 378] <... munmap resumed>) = 0 [pid 377] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 378] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 377] <... open resumed>) = 3 [pid 378] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 378] ioctl(4, LOOP_CLR_FD) = 0 [pid 377] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 377] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 378] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 378] close(4) = 0 [pid 378] close(3 [pid 377] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 379] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 380] <... write resumed>) = 1048576 [pid 380] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 380] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 380] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 380] ioctl(4, LOOP_CLR_FD) = 0 [pid 378] <... close resumed>) = 0 [pid 377] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 380] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 380] close(4) = 0 [pid 380] close(3 [pid 377] <... openat resumed>) = 5 [pid 377] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 377] exit_group(0) = ? [pid 377] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=377, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 381] <... write resumed>) = 1048576 [pid 378] chdir("./file0") = 0 [pid 378] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 380] <... close resumed>) = 0 [pid 378] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 378] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 378] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 381] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 381] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 381] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 381] ioctl(4, LOOP_CLR_FD) = 0 [pid 380] chdir("./file0") = 0 [pid 378] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 380] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 378] <... openat resumed>) = 5 [pid 380] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 378] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 378] exit_group(0 [pid 380] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 381] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 381] close(4) = 0 [pid 381] close(3 [pid 379] <... write resumed>) = 1048576 [pid 378] <... exit_group resumed>) = ? [pid 378] +++ exited with 0 +++ [pid 297] <... restart_syscall resumed>) = 0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=378, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 382 [pid 380] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 379] munmap(0x7f1ddd1fa000, 138412032 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 379] <... munmap resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 379] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 383 [pid 380] <... mmap resumed>) = 0x20000000 [pid 380] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 379] <... openat resumed>) = 4 [pid 380] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 380] exit_group(0 [pid 379] ioctl(4, LOOP_SET_FD, 3 [pid 380] <... exit_group resumed>) = ? [pid 379] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) ./strace-static-x86_64: Process 382 attached [pid 379] ioctl(4, LOOP_CLR_FD) = 0 [pid 382] set_robust_list(0x55555671f660, 24) = 0 [pid 382] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 380] +++ exited with 0 +++ [pid 382] setpgid(0, 0 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=380, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 382] <... setpgid resumed>) = 0 [pid 381] <... close resumed>) = 0 [pid 381] chdir("./file0") = 0 [pid 381] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 ./strace-static-x86_64: Process 383 attached [pid 379] ioctl(4, LOOP_SET_FD, 3 [pid 383] set_robust_list(0x55555671f660, 24 [pid 381] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 383] <... set_robust_list resumed>) = 0 [pid 383] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 379] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 381] <... mount resumed>) = 0 [pid 383] <... prctl resumed>) = 0 [pid 382] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 379] close(4 [pid 381] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 383] setpgid(0, 0 [pid 381] <... open resumed>) = 4 [pid 383] <... setpgid resumed>) = 0 [pid 383] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 379] <... close resumed>) = 0 [pid 381] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 379] close(3 [pid 383] <... openat resumed>) = 3 [pid 381] <... mmap resumed>) = 0x20000000 [pid 383] write(3, "1000", 4) = 4 [pid 383] close(3) = 0 [pid 383] write(1, "executing program\n", 18) = 18 [pid 383] memfd_create("syzkaller", 0) = 3 [pid 383] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 381] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 381] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 381] exit_group(0) = ? [pid 381] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=381, si_uid=0, si_status=0, si_utime=1, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 384 [pid 379] <... close resumed>) = 0 executing program [pid 382] <... openat resumed>) = 3 [pid 379] chdir("./file0" [pid 383] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 384 attached [pid 384] set_robust_list(0x55555671f660, 24) = 0 [pid 384] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 384] setpgid(0, 0) = 0 [pid 384] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 384] write(3, "1000", 4) = 4 [pid 384] close(3) = 0 [pid 384] write(1, "executing program\n", 18) = 18 [pid 384] memfd_create("syzkaller", 0) = 3 [pid 384] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 385 [pid 382] write(3, "1000", 4 [pid 379] <... chdir resumed>) = 0 [pid 382] <... write resumed>) = 4 [pid 379] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 382] close(3) = 0 [pid 379] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULLexecuting program [pid 382] write(1, "executing program\n", 18 [pid 379] <... mount resumed>) = 0 [pid 382] <... write resumed>) = 18 [pid 379] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 382] memfd_create("syzkaller", 0 [pid 379] <... open resumed>) = 4 [pid 382] <... memfd_create resumed>) = 3 [pid 379] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 382] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0executing program ) = 0x7f1ddd1fa000 [pid 379] <... mmap resumed>) = 0x20000000 [pid 383] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 385 attached [pid 385] set_robust_list(0x55555671f660, 24) = 0 [pid 385] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 385] setpgid(0, 0) = 0 [pid 385] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 385] write(3, "1000", 4) = 4 [pid 385] close(3) = 0 [pid 385] write(1, "executing program\n", 18) = 18 [pid 385] memfd_create("syzkaller", 0 [pid 383] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 385] <... memfd_create resumed>) = 3 [pid 385] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 382] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 383] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 383] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 383] ioctl(4, LOOP_CLR_FD) = 0 [pid 379] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 379] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 379] exit_group(0) = ? [pid 383] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 383] close(4) = 0 [pid 383] close(3 [pid 379] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=379, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 383] <... close resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 386 [pid 384] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 382] <... write resumed>) = 1048576 [pid 383] chdir("./file0") = 0 [pid 383] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 383] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 386 attached [pid 383] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 386] set_robust_list(0x55555671f660, 24 [pid 383] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 386] <... set_robust_list resumed>) = 0 [pid 386] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 382] munmap(0x7f1ddd1fa000, 138412032 [pid 386] <... prctl resumed>) = 0 [pid 386] setpgid(0, 0) = 0 [pid 386] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 383] <... mmap resumed>) = 0x20000000 [pid 382] <... munmap resumed>) = 0 [pid 386] write(3, "1000", 4) = 4 [pid 382] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 386] close(3) = 0 [pid 386] write(1, "executing program\n", 18executing program ) = 18 [pid 386] memfd_create("syzkaller", 0 [pid 382] <... openat resumed>) = 4 [pid 382] ioctl(4, LOOP_SET_FD, 3 [pid 386] <... memfd_create resumed>) = 3 [pid 382] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 386] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 382] ioctl(4, LOOP_CLR_FD) = 0 [pid 383] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 383] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 383] exit_group(0 [pid 382] ioctl(4, LOOP_SET_FD, 3 [pid 383] <... exit_group resumed>) = ? [pid 382] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 382] close(4) = 0 [pid 382] close(3 [pid 383] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=383, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 382] <... close resumed>) = 0 [pid 382] chdir("./file0" [pid 384] <... write resumed>) = 1048576 [pid 382] <... chdir resumed>) = 0 [pid 384] munmap(0x7f1ddd1fa000, 138412032 [pid 382] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 384] <... munmap resumed>) = 0 [pid 384] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 384] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 384] ioctl(4, LOOP_CLR_FD) = 0 [pid 385] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 382] <... open resumed>) = 3 [pid 382] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 382] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 384] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 384] close(4) = 0 [pid 384] close(3 [pid 382] <... open resumed>) = 4 [pid 382] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 295] <... restart_syscall resumed>) = 0 [pid 382] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 382] <... openat resumed>) = 5 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 387 [pid 382] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 382] exit_group(0) = ? [pid 382] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=382, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 386] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 387 attached [pid 387] set_robust_list(0x55555671f660, 24) = 0 [pid 384] <... close resumed>) = 0 [pid 384] chdir("./file0") = 0 [pid 384] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 384] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 387] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 388 [pid 387] <... prctl resumed>) = 0 [pid 384] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 387] setpgid(0, 0 [pid 384] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 387] <... setpgid resumed>) = 0 [pid 387] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 384] <... mmap resumed>) = 0x20000000 [pid 385] <... write resumed>) = 1048576 [pid 387] <... openat resumed>) = 3 [pid 384] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 387] write(3, "1000", 4 [pid 384] <... openat resumed>) = 5 [pid 385] munmap(0x7f1ddd1fa000, 138412032 [pid 387] <... write resumed>) = 4 [pid 384] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 384] exit_group(0 [pid 387] close(3 [pid 384] <... exit_group resumed>) = ? [pid 387] <... close resumed>) = 0 [pid 387] write(1, "executing program\n", 18executing program [pid 385] <... munmap resumed>) = 0 [pid 385] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 385] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 385] ioctl(4, LOOP_CLR_FD [pid 387] <... write resumed>) = 18 [pid 385] <... ioctl resumed>) = 0 [pid 387] memfd_create("syzkaller", 0) = 3 [pid 387] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 386] <... write resumed>) = 1048576 [pid 385] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 385] close(4) = 0 [pid 385] close(3 [pid 384] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=384, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 388 attached [pid 388] set_robust_list(0x55555671f660, 24) = 0 [pid 388] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 388] setpgid(0, 0) = 0 [pid 388] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 388] write(3, "1000", 4) = 4 [pid 385] <... close resumed>) = 0 [pid 385] chdir("./file0") = 0 [pid 385] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 385] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 388] close(3 [pid 385] <... mount resumed>) = 0 [pid 388] <... close resumed>) = 0 [pid 387] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 386] munmap(0x7f1ddd1fa000, 138412032 [pid 298] <... restart_syscall resumed>) = 0 [pid 388] write(1, "executing program\n", 18executing program ) = 18 [pid 385] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 388] memfd_create("syzkaller", 0 [pid 385] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 388] <... memfd_create resumed>) = 3 [pid 385] <... mmap resumed>) = 0x20000000 [pid 298] <... openat resumed>) = 3 [pid 388] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 386] <... munmap resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 386] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 386] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 386] ioctl(4, LOOP_CLR_FD) = 0 [pid 385] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 388] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 385] <... openat resumed>) = 5 [pid 298] <... ioctl resumed>) = 0 [pid 385] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 385] exit_group(0) = ? [pid 385] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=385, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 386] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 386] close(4) = 0 [pid 386] close(3) = 0 [pid 386] chdir("./file0") = 0 [pid 386] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 386] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 386] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 386] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 388] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] close(3) = 0 [pid 386] <... mmap resumed>) = 0x20000000 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 386] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 386] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 389 [pid 386] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 386] exit_group(0) = ? [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 390 [pid 386] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=386, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 387] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 389 attached [pid 389] set_robust_list(0x55555671f660, 24) = 0 [pid 389] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 387] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 389] <... prctl resumed>) = 0 [pid 389] setpgid(0, 0) = 0 [pid 389] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 387] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 387] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 387] ioctl(4, LOOP_CLR_FD) = 0 [pid 389] write(3, "1000", 4) = 4 [pid 389] close(3) = 0 [pid 389] write(1, "executing program\n", 18executing program ) = 18 [pid 389] memfd_create("syzkaller", 0) = 3 [pid 389] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 387] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 387] close(4) = 0 [pid 387] close(3./strace-static-x86_64: Process 390 attached [pid 390] set_robust_list(0x55555671f660, 24 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 390] <... set_robust_list resumed>) = 0 [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 390] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 391 [pid 390] <... prctl resumed>) = 0 [pid 390] setpgid(0, 0) = 0 [pid 390] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 390] write(3, "1000", 4) = 4 [pid 390] close(3) = 0 [pid 390] write(1, "executing program\n", 18 [pid 387] <... close resumed>) = 0 [pid 387] chdir("./file0") = 0 [pid 387] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 387] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 387] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 387] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 390] <... write resumed>) = 18 [pid 390] memfd_create("syzkaller", 0 [pid 388] <... write resumed>) = 1048576 [pid 387] <... mmap resumed>) = 0x20000000 [pid 387] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 390] <... memfd_create resumed>) = 3 [pid 387] <... openat resumed>) = 5 [pid 387] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 387] exit_group(0./strace-static-x86_64: Process 391 attached ) = ? [pid 390] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 388] munmap(0x7f1ddd1fa000, 138412032 [pid 390] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 391] set_robust_list(0x55555671f660, 24) = 0 [pid 388] <... munmap resumed>) = 0 executing program [pid 391] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 391] setpgid(0, 0) = 0 [pid 391] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 391] write(3, "1000", 4) = 4 [pid 391] close(3) = 0 [pid 391] write(1, "executing program\n", 18) = 18 [pid 391] memfd_create("syzkaller", 0) = 3 [pid 391] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 390] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 388] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 387] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=387, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 389] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 388] <... openat resumed>) = 4 [pid 388] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 388] ioctl(4, LOOP_CLR_FD) = 0 [pid 388] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 388] close(4) = 0 [pid 388] close(3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 392 [pid 388] <... close resumed>) = 0 [pid 388] chdir("./file0") = 0 [pid 388] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 388] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 388] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 388] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 389] <... write resumed>) = 1048576 [pid 389] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 388] <... mmap resumed>) = 0x20000000 [pid 389] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 389] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 389] ioctl(4, LOOP_CLR_FD) = 0 [pid 391] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 388] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 ./strace-static-x86_64: Process 392 attached [pid 392] set_robust_list(0x55555671f660, 24) = 0 [pid 388] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 392] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 388] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 391] <... write resumed>) = 1048576 [pid 390] <... write resumed>) = 1048576 [pid 392] <... prctl resumed>) = 0 [pid 389] ioctl(4, LOOP_SET_FD, 3 [pid 392] setpgid(0, 0 [pid 389] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 392] <... setpgid resumed>) = 0 [pid 389] close(4 [pid 388] exit_group(0 [pid 392] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 389] <... close resumed>) = 0 [pid 388] <... exit_group resumed>) = ? [pid 392] <... openat resumed>) = 3 [pid 389] close(3 [pid 392] write(3, "1000", 4 [pid 389] <... close resumed>) = 0 [pid 388] +++ exited with 0 +++ [pid 392] <... write resumed>) = 4 [pid 392] close(3 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=388, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- executing program [pid 392] <... close resumed>) = 0 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 392] write(1, "executing program\n", 18) = 18 [pid 392] memfd_create("syzkaller", 0) = 3 [pid 392] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 389] chdir("./file0") = 0 [pid 389] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 391] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 389] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 393 [pid 389] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 389] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 391] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 391] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 391] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 393 attached [pid 391] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 391] close(4) = 0 [pid 391] close(3 [pid 393] set_robust_list(0x55555671f660, 24 [pid 391] <... close resumed>) = 0 [pid 389] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 389] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 389] exit_group(0) = ? [pid 393] <... set_robust_list resumed>) = 0 [pid 389] +++ exited with 0 +++ [pid 391] chdir("./file0") = 0 [pid 391] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 391] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=389, si_uid=0, si_status=0, si_utime=2, si_stime=0} --- [pid 391] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 391] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 393] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 391] <... mmap resumed>) = 0x20000000 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 393] <... prctl resumed>) = 0 [pid 393] setpgid(0, 0 [pid 392] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 390] munmap(0x7f1ddd1fa000, 138412032 [pid 393] <... setpgid resumed>) = 0 [pid 390] <... munmap resumed>) = 0 [pid 390] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 393] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 392] <... write resumed>) = 1048576 [pid 390] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 390] ioctl(4, LOOP_CLR_FD) = 0 [pid 391] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 391] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 391] exit_group(0) = ? [pid 393] <... openat resumed>) = 3 [pid 391] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=391, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 390] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 390] close(4) = 0 [pid 390] close(3 [pid 393] write(3, "1000", 4 [pid 298] <... restart_syscall resumed>) = 0 [pid 393] <... write resumed>) = 4 [pid 393] close(3 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 393] <... close resumed>) = 0 [pid 298] <... openat resumed>) = 3 executing program [pid 393] write(1, "executing program\n", 18) = 18 [pid 298] ioctl(3, LOOP_CLR_FD [pid 393] memfd_create("syzkaller", 0 [pid 298] <... ioctl resumed>) = 0 [pid 390] <... close resumed>) = 0 [pid 298] close(3 [pid 393] <... memfd_create resumed>) = 3 [pid 298] <... close resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 393] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 394 [pid 390] chdir("./file0") = 0 [pid 393] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 390] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 390] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 390] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 390] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 392] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 390] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 392] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 392] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 392] ioctl(4, LOOP_CLR_FD [pid 390] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 392] <... ioctl resumed>) = 0 [pid 390] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 390] exit_group(0) = ? [pid 390] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=390, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 392] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 392] close(4) = 0 [pid 392] close(3) = 0 ./strace-static-x86_64: Process 394 attached [pid 393] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 395 [pid 394] set_robust_list(0x55555671f660, 24) = 0 [pid 394] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 394] setpgid(0, 0) = 0 [pid 394] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 394] write(3, "1000", 4) = 4 [pid 394] close(3executing program ) = 0 [pid 394] write(1, "executing program\n", 18) = 18 [pid 394] memfd_create("syzkaller", 0) = 3 [pid 394] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 396 [pid 392] chdir("./file0") = 0 [pid 392] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 392] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 392] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 392] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 393] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 395 attached [pid 392] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 392] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 392] exit_group(0) = ? [pid 395] set_robust_list(0x55555671f660, 24 [pid 393] munmap(0x7f1ddd1fa000, 138412032 [pid 395] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 396 attached [pid 396] set_robust_list(0x55555671f660, 24 [pid 395] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 396] <... set_robust_list resumed>) = 0 [pid 396] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 395] <... prctl resumed>) = 0 [pid 396] <... prctl resumed>) = 0 [pid 396] setpgid(0, 0) = 0 [pid 395] setpgid(0, 0) = 0 [pid 396] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 396] write(3, "1000", 4) = 4 [pid 396] close(3) = 0 [pid 395] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program [pid 396] write(1, "executing program\n", 18) = 18 [pid 396] memfd_create("syzkaller", 0) = 3 [pid 396] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 395] <... openat resumed>) = 3 [pid 392] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=392, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 395] write(3, "1000", 4) = 4 [pid 395] close(3) = 0 [pid 395] write(1, "executing program\n", 18executing program ) = 18 [pid 395] memfd_create("syzkaller", 0 [pid 393] <... munmap resumed>) = 0 [pid 395] <... memfd_create resumed>) = 3 [pid 393] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 395] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 393] <... openat resumed>) = 4 [pid 395] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 393] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 393] ioctl(4, LOOP_CLR_FD [pid 394] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 397 [pid 395] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 393] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 397 attached [pid 397] set_robust_list(0x55555671f660, 24) = 0 [pid 397] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 397] setpgid(0, 0) = 0 [pid 397] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 393] ioctl(4, LOOP_SET_FD, 3 [pid 397] <... openat resumed>) = 3 [pid 393] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 397] write(3, "1000", 4) = 4 [pid 393] close(4 [pid 397] close(3) = 0 executing program [pid 397] write(1, "executing program\n", 18) = 18 [pid 397] memfd_create("syzkaller", 0 [pid 393] <... close resumed>) = 0 [pid 397] <... memfd_create resumed>) = 3 [pid 396] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 397] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 393] close(3 [pid 397] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 393] <... close resumed>) = 0 [pid 393] chdir("./file0") = 0 [pid 393] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 394] <... write resumed>) = 1048576 [pid 393] <... open resumed>) = 3 [pid 394] munmap(0x7f1ddd1fa000, 138412032 [pid 393] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 394] <... munmap resumed>) = 0 [pid 394] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 394] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 394] ioctl(4, LOOP_CLR_FD) = 0 [pid 393] <... mount resumed>) = 0 [pid 393] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 393] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 394] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 394] close(4) = 0 [pid 394] close(3 [pid 393] <... mmap resumed>) = 0x20000000 [pid 393] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 393] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 393] exit_group(0) = ? [pid 393] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=393, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 396] <... write resumed>) = 1048576 [pid 394] <... close resumed>) = 0 [pid 394] chdir("./file0") = 0 [pid 396] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 394] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 394] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 397] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 394] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 395] <... write resumed>) = 1048576 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 398 [pid 396] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 395] munmap(0x7f1ddd1fa000, 138412032 [pid 394] <... open resumed>) = 4 [pid 396] <... openat resumed>) = 4 [pid 396] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 394] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 396] ioctl(4, LOOP_CLR_FD) = 0 [pid 395] <... munmap resumed>) = 0 [pid 394] <... mmap resumed>) = 0x20000000 [pid 394] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 395] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 396] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 396] close(4) = 0 [pid 396] close(3 [pid 395] <... openat resumed>) = 4 [pid 395] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 395] ioctl(4, LOOP_CLR_FD) = 0 [pid 394] <... openat resumed>) = 5 [pid 394] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 394] exit_group(0) = ? [pid 394] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=394, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 396] <... close resumed>) = 0 [pid 395] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 398 attached [pid 397] <... write resumed>) = 1048576 [pid 396] chdir("./file0" [pid 395] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 296] <... restart_syscall resumed>) = 0 [pid 397] munmap(0x7f1ddd1fa000, 138412032 [pid 396] <... chdir resumed>) = 0 [pid 396] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 398] set_robust_list(0x55555671f660, 24 [pid 396] <... open resumed>) = 3 [pid 395] close(4 [pid 397] <... munmap resumed>) = 0 [pid 396] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 397] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 398] <... set_robust_list resumed>) = 0 [pid 397] <... openat resumed>) = 4 [pid 396] <... mount resumed>) = 0 [pid 395] <... close resumed>) = 0 [pid 296] <... openat resumed>) = 3 [pid 397] ioctl(4, LOOP_SET_FD, 3 [pid 396] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 296] ioctl(3, LOOP_CLR_FD [pid 397] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 396] <... open resumed>) = 4 [pid 397] ioctl(4, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 397] <... ioctl resumed>) = 0 [pid 396] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 296] close(3 [pid 398] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 395] close(3 [pid 296] <... close resumed>) = 0 [pid 398] <... prctl resumed>) = 0 [pid 396] <... mmap resumed>) = 0x20000000 [pid 395] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 397] ioctl(4, LOOP_SET_FD, 3 [pid 396] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 398] setpgid(0, 0) = 0 [pid 398] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 397] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 396] <... openat resumed>) = 5 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 399 [pid 397] close(4 [pid 396] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 398] <... openat resumed>) = 3 [pid 397] <... close resumed>) = 0 [pid 396] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 397] close(3 [pid 398] write(3, "1000", 4 [pid 396] exit_group(0 [pid 398] <... write resumed>) = 4 [pid 398] close(3) = 0 executing program [pid 398] write(1, "executing program\n", 18) = 18 [pid 398] memfd_create("syzkaller", 0 [pid 395] chdir("./file0" [pid 398] <... memfd_create resumed>) = 3 [pid 395] <... chdir resumed>) = 0 [pid 398] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 395] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 398] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 397] <... close resumed>) = 0 [pid 396] <... exit_group resumed>) = ? [pid 395] <... open resumed>) = 3 [pid 397] chdir("./file0") = 0 [pid 396] +++ exited with 0 +++ [pid 395] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 399 attached [pid 397] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 395] <... mount resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=396, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 399] set_robust_list(0x55555671f660, 24 [pid 397] <... open resumed>) = 3 [pid 395] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 399] <... set_robust_list resumed>) = 0 [pid 397] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 395] <... open resumed>) = 4 [pid 399] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 397] <... mount resumed>) = 0 [pid 395] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 399] <... prctl resumed>) = 0 [pid 397] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 395] <... mmap resumed>) = 0x20000000 [pid 299] <... openat resumed>) = 3 [pid 399] setpgid(0, 0 [pid 397] <... open resumed>) = 4 [pid 395] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] ioctl(3, LOOP_CLR_FD [pid 398] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 395] <... openat resumed>) = 5 [pid 299] <... ioctl resumed>) = 0 [pid 395] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 299] close(3 [pid 395] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 299] <... close resumed>) = 0 [pid 395] exit_group(0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 399] <... setpgid resumed>) = 0 [pid 397] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 395] <... exit_group resumed>) = ? [pid 399] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 397] <... mmap resumed>) = 0x20000000 [pid 395] +++ exited with 0 +++ [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 400 [pid 399] <... openat resumed>) = 3 [pid 397] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=395, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 399] write(3, "1000", 4 [pid 397] <... openat resumed>) = 5 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 399] <... write resumed>) = 4 [pid 397] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 399] close(3 [pid 397] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 399] <... close resumed>) = 0 executing program [pid 399] write(1, "executing program\n", 18 [pid 397] exit_group(0 [pid 399] <... write resumed>) = 18 [pid 397] <... exit_group resumed>) = ? [pid 399] memfd_create("syzkaller", 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 397] +++ exited with 0 +++ [pid 399] <... memfd_create resumed>) = 3 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 399] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 298] <... openat resumed>) = 3 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=397, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 399] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 298] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 400 attached ) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 401 [pid 398] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 401 attached [pid 401] set_robust_list(0x55555671f660, 24) = 0 [pid 399] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 400] set_robust_list(0x55555671f660, 24 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 400] <... set_robust_list resumed>) = 0 [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 401] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 400] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 295] <... ioctl resumed>) = 0 [pid 400] <... prctl resumed>) = 0 [pid 295] close(3 [pid 400] setpgid(0, 0 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 400] <... setpgid resumed>) = 0 [pid 401] <... prctl resumed>) = 0 [pid 401] setpgid(0, 0 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 402 [pid 401] <... setpgid resumed>) = 0 [pid 400] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 401] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 398] munmap(0x7f1ddd1fa000, 138412032 [pid 401] <... openat resumed>) = 3 [pid 398] <... munmap resumed>) = 0 [pid 401] write(3, "1000", 4) = 4 [pid 401] close(3) = 0 [pid 401] write(1, "executing program\n", 18executing program ) = 18 [pid 401] memfd_create("syzkaller", 0 [pid 398] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 401] <... memfd_create resumed>) = 3 [pid 398] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 398] ioctl(4, LOOP_CLR_FD) = 0 [pid 401] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 398] ioctl(4, LOOP_SET_FD, 3 [pid 400] <... openat resumed>) = 3 [pid 400] write(3, "1000", 4 [pid 398] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 398] close(4 [pid 400] <... write resumed>) = 4 [pid 398] <... close resumed>) = 0 [pid 398] close(3 [pid 400] close(3executing program ) = 0 [pid 400] write(1, "executing program\n", 18) = 18 [pid 400] memfd_create("syzkaller", 0) = 3 [pid 400] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 399] <... write resumed>) = 1048576 [pid 398] <... close resumed>) = 0 [pid 398] chdir("./file0") = 0 [pid 398] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 398] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 402 attached [pid 398] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 400] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 399] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 399] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 399] ioctl(4, LOOP_SET_FD, 3 [pid 402] set_robust_list(0x55555671f660, 24) = 0 [pid 399] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 399] ioctl(4, LOOP_CLR_FD) = 0 [pid 402] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 398] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 402] <... prctl resumed>) = 0 [pid 399] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 399] close(4) = 0 [pid 399] close(3 [pid 402] setpgid(0, 0) = 0 [pid 402] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 398] <... mmap resumed>) = 0x20000000 [pid 402] <... openat resumed>) = 3 [pid 399] <... close resumed>) = 0 executing program [pid 402] write(3, "1000", 4) = 4 [pid 402] close(3) = 0 [pid 402] write(1, "executing program\n", 18) = 18 [pid 402] memfd_create("syzkaller", 0) = 3 [pid 402] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 399] chdir("./file0" [pid 398] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 399] <... chdir resumed>) = 0 [pid 398] <... openat resumed>) = 5 [pid 399] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 399] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 398] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 399] <... mount resumed>) = 0 [pid 399] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 398] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 399] <... open resumed>) = 4 [pid 398] exit_group(0 [pid 399] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 398] <... exit_group resumed>) = ? [pid 399] <... mmap resumed>) = 0x20000000 [pid 398] +++ exited with 0 +++ [pid 399] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=398, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 401] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 400] <... write resumed>) = 1048576 [pid 399] <... openat resumed>) = 5 [pid 399] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 400] munmap(0x7f1ddd1fa000, 138412032 [pid 399] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 399] exit_group(0 [pid 400] <... munmap resumed>) = 0 [pid 399] <... exit_group resumed>) = ? [pid 400] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 399] +++ exited with 0 +++ [pid 400] <... openat resumed>) = 4 [pid 297] <... restart_syscall resumed>) = 0 [pid 400] ioctl(4, LOOP_SET_FD, 3 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=399, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 400] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 400] ioctl(4, LOOP_CLR_FD [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 400] <... ioctl resumed>) = 0 [pid 297] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 403 [pid 400] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 400] close(4) = 0 [pid 400] close(3 [pid 402] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 401] <... write resumed>) = 1048576 [pid 401] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 400] <... close resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 400] chdir("./file0") = 0 [pid 400] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 400] <... open resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 400] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 296] ioctl(3, LOOP_CLR_FD [pid 400] <... mount resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 400] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 296] close(3 [pid 400] <... open resumed>) = 4 [pid 296] <... close resumed>) = 0 ./strace-static-x86_64: Process 403 attached [pid 400] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 401] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 401] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 400] <... mmap resumed>) = 0x20000000 [pid 401] ioctl(4, LOOP_CLR_FD) = 0 [pid 400] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 403] set_robust_list(0x55555671f660, 24) = 0 [pid 400] <... openat resumed>) = 5 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 404 [pid 400] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 403] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 400] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 403] <... prctl resumed>) = 0 [pid 400] exit_group(0 [pid 403] setpgid(0, 0 [pid 400] <... exit_group resumed>) = ? [pid 400] +++ exited with 0 +++ [pid 403] <... setpgid resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=400, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 401] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 401] close(4) = 0 [pid 401] close(3) = 0 [pid 401] chdir("./file0") = 0 [pid 401] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 401] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 401] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 401] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0./strace-static-x86_64: Process 404 attached [pid 403] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 404] set_robust_list(0x55555671f660, 24) = 0 [pid 403] <... openat resumed>) = 3 [pid 404] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 403] write(3, "1000", 4 [pid 404] <... prctl resumed>) = 0 [pid 403] <... write resumed>) = 4 [pid 404] setpgid(0, 0 [pid 403] close(3 [pid 404] <... setpgid resumed>) = 0 [pid 403] <... close resumed>) = 0 executing program [pid 404] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 403] write(1, "executing program\n", 18 [pid 404] <... openat resumed>) = 3 [pid 403] <... write resumed>) = 18 [pid 404] write(3, "1000", 4) = 4 [pid 403] memfd_create("syzkaller", 0 [pid 404] close(3executing program ) = 0 [pid 403] <... memfd_create resumed>) = 3 [pid 404] write(1, "executing program\n", 18 [pid 403] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 404] <... write resumed>) = 18 [pid 404] memfd_create("syzkaller", 0 [pid 403] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 404] <... memfd_create resumed>) = 3 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 405 [pid 402] <... write resumed>) = 1048576 [pid 401] <... mmap resumed>) = 0x20000000 [pid 402] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 402] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 401] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 402] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 402] ioctl(4, LOOP_CLR_FD) = 0 [pid 401] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 403] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 404] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 401] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 401] exit_group(0 [pid 402] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 402] close(4) = 0 [pid 402] close(3 [pid 401] <... exit_group resumed>) = ? [pid 401] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=401, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 405 attached [pid 405] set_robust_list(0x55555671f660, 24 [pid 404] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 405] <... set_robust_list resumed>) = 0 [pid 405] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 405] setpgid(0, 0) = 0 [pid 405] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 405] write(3, "1000", 4) = 4 [pid 405] close(3 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 403] <... write resumed>) = 1048576 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 406 executing program [pid 405] <... close resumed>) = 0 [pid 405] write(1, "executing program\n", 18) = 18 [pid 405] memfd_create("syzkaller", 0) = 3 [pid 405] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 402] <... close resumed>) = 0 [pid 402] chdir("./file0") = 0 [pid 402] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 402] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 404] <... write resumed>) = 1048576 [pid 402] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 402] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 402] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 402] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 402] exit_group(0./strace-static-x86_64: Process 406 attached ) = ? [pid 406] set_robust_list(0x55555671f660, 24) = 0 [pid 406] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 406] setpgid(0, 0) = 0 [pid 406] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 406] write(3, "1000", 4) = 4 [pid 406] close(3executing program ) = 0 [pid 406] write(1, "executing program\n", 18) = 18 [pid 406] memfd_create("syzkaller", 0) = 3 [pid 406] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 402] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=402, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 404] munmap(0x7f1ddd1fa000, 138412032 [pid 403] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 404] <... munmap resumed>) = 0 [pid 403] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 404] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 403] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 404] <... openat resumed>) = 4 [pid 403] ioctl(4, LOOP_CLR_FD) = 0 [pid 404] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 404] ioctl(4, LOOP_CLR_FD [pid 403] ioctl(4, LOOP_SET_FD, 3 [pid 404] <... ioctl resumed>) = 0 [pid 403] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 403] close(4) = 0 [pid 403] close(3) = 0 [pid 404] ioctl(4, LOOP_SET_FD, 3 [pid 403] chdir("./file0" [pid 404] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 404] close(4 [pid 403] <... chdir resumed>) = 0 [pid 404] <... close resumed>) = 0 [pid 403] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 404] close(3 [pid 403] <... open resumed>) = 3 [pid 404] <... close resumed>) = 0 [pid 403] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 404] chdir("./file0" [pid 403] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 295] <... restart_syscall resumed>) = 0 [pid 404] <... chdir resumed>) = 0 [pid 404] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 403] <... open resumed>) = 4 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 403] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 407 [pid 405] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 403] <... mmap resumed>) = 0x20000000 [pid 404] <... open resumed>) = 3 [pid 406] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 403] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 404] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 407 attached ) = 0 [pid 403] <... openat resumed>) = 5 [pid 407] set_robust_list(0x55555671f660, 24 [pid 404] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 403] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 407] <... set_robust_list resumed>) = 0 [pid 404] <... open resumed>) = 4 [pid 403] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 407] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 404] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 403] exit_group(0 [pid 407] <... prctl resumed>) = 0 [pid 404] <... mmap resumed>) = 0x20000000 [pid 403] <... exit_group resumed>) = ? [pid 407] setpgid(0, 0 [pid 405] <... write resumed>) = 1048576 [pid 403] +++ exited with 0 +++ [pid 404] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 407] <... setpgid resumed>) = 0 [pid 404] <... openat resumed>) = 5 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=403, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 407] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 404] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 407] <... openat resumed>) = 3 [pid 407] write(3, "1000", 4 [pid 404] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 407] <... write resumed>) = 4 [pid 407] close(3 [pid 404] exit_group(0 [pid 407] <... close resumed>) = 0 [pid 404] <... exit_group resumed>) = ? [pid 407] write(1, "executing program\n", 18executing program [pid 405] munmap(0x7f1ddd1fa000, 138412032 [pid 404] +++ exited with 0 +++ [pid 407] <... write resumed>) = 18 [pid 407] memfd_create("syzkaller", 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=404, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 407] <... memfd_create resumed>) = 3 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 407] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 405] <... munmap resumed>) = 0 [pid 405] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 405] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 405] ioctl(4, LOOP_CLR_FD) = 0 [pid 406] <... write resumed>) = 1048576 [pid 406] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 405] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 405] close(4) = 0 [pid 405] close(3 [pid 407] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 405] <... close resumed>) = 0 [pid 406] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 406] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 406] ioctl(4, LOOP_CLR_FD) = 0 [pid 405] chdir("./file0") = 0 [pid 405] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 406] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 406] close(4) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] ioctl(3, LOOP_CLR_FD [pid 297] close(3 [pid 296] <... ioctl resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 296] close(3 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... close resumed>) = 0 [pid 406] close(3 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 408 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 409 [pid 406] <... close resumed>) = 0 [pid 405] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 405] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 407] <... write resumed>) = 1048576 [pid 405] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 405] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 405] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 405] exit_group(0) = ? [pid 405] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=405, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 406] chdir("./file0") = 0 [pid 406] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 406] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 408 attached [pid 407] munmap(0x7f1ddd1fa000, 138412032 [pid 408] set_robust_list(0x55555671f660, 24) = 0 [pid 407] <... munmap resumed>) = 0 [pid 408] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 407] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 408] <... prctl resumed>) = 0 [pid 408] setpgid(0, 0 [pid 407] <... openat resumed>) = 4 [pid 408] <... setpgid resumed>) = 0 [pid 408] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 407] ioctl(4, LOOP_SET_FD, 3executing program [pid 408] <... openat resumed>) = 3 [pid 407] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 408] write(3, "1000", 4) = 4 [pid 407] ioctl(4, LOOP_CLR_FD [pid 408] close(3 [pid 407] <... ioctl resumed>) = 0 [pid 408] <... close resumed>) = 0 [pid 408] write(1, "executing program\n", 18) = 18 [pid 408] memfd_create("syzkaller", 0) = 3 [pid 408] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 406] <... mount resumed>) = 0 ./strace-static-x86_64: Process 409 attached [pid 409] set_robust_list(0x55555671f660, 24 [pid 406] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 409] <... set_robust_list resumed>) = 0 [pid 409] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 406] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 409] <... prctl resumed>) = 0 [pid 409] setpgid(0, 0) = 0 [pid 409] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 409] write(3, "1000", 4) = 4 [pid 409] close(3) = 0 [pid 409] write(1, "executing program\n", 18executing program ) = 18 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 408] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 299] <... ioctl resumed>) = 0 [pid 407] ioctl(4, LOOP_SET_FD, 3 [pid 299] close(3 [pid 407] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] <... close resumed>) = 0 [pid 407] close(4 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 407] <... close resumed>) = 0 [pid 407] close(3 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 410 [pid 409] memfd_create("syzkaller", 0) = 3 [pid 409] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 406] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 407] <... close resumed>) = 0 [pid 406] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 406] exit_group(0 [pid 407] chdir("./file0") = 0 [pid 406] <... exit_group resumed>) = ? [pid 407] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 406] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=406, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 409] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 410 attached [pid 410] set_robust_list(0x55555671f660, 24) = 0 [pid 410] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 410] setpgid(0, 0) = 0 [pid 407] <... open resumed>) = 3 [pid 407] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 407] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 407] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 410] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 298] <... restart_syscall resumed>) = 0 [pid 407] <... mmap resumed>) = 0x20000000 [pid 407] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 407] <... openat resumed>) = 5 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 411 [pid 410] <... openat resumed>) = 3 [pid 410] write(3, "1000", 4) = 4 [pid 410] close(3) = 0 executing program [pid 410] write(1, "executing program\n", 18) = 18 [pid 410] memfd_create("syzkaller", 0) = 3 [pid 410] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 408] <... write resumed>) = 1048576 [pid 407] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 408] munmap(0x7f1ddd1fa000, 138412032 [pid 407] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 407] exit_group(0) = ? [pid 407] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=407, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 408] <... munmap resumed>) = 0 [pid 408] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 408] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 408] ioctl(4, LOOP_CLR_FD) = 0 [pid 408] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 408] close(4) = 0 [pid 408] close(3./strace-static-x86_64: Process 411 attached [pid 411] set_robust_list(0x55555671f660, 24) = 0 [pid 411] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 411] setpgid(0, 0) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 411] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 412 [pid 411] write(3, "1000", 4 [pid 408] <... close resumed>) = 0 [pid 411] <... write resumed>) = 4 [pid 411] close(3) = 0 executing program [pid 411] write(1, "executing program\n", 18) = 18 [pid 411] memfd_create("syzkaller", 0) = 3 [pid 411] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 410] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 411] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 409] <... write resumed>) = 1048576 [pid 408] chdir("./file0"./strace-static-x86_64: Process 412 attached ) = 0 [pid 412] set_robust_list(0x55555671f660, 24 [pid 408] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 412] <... set_robust_list resumed>) = 0 [pid 408] <... open resumed>) = 3 [pid 412] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 408] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 412] <... prctl resumed>) = 0 [pid 408] <... mount resumed>) = 0 [pid 412] setpgid(0, 0 [pid 408] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 412] <... setpgid resumed>) = 0 [pid 408] <... open resumed>) = 4 [pid 412] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 408] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 412] <... openat resumed>) = 3 [pid 408] <... mmap resumed>) = 0x20000000 [pid 412] write(3, "1000", 4 [pid 408] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 412] <... write resumed>) = 4 executing program [pid 412] close(3 [pid 408] <... openat resumed>) = 5 [pid 412] <... close resumed>) = 0 [pid 408] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 412] write(1, "executing program\n", 18 [pid 408] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 412] <... write resumed>) = 18 [pid 412] memfd_create("syzkaller", 0 [pid 408] exit_group(0 [pid 412] <... memfd_create resumed>) = 3 [pid 408] <... exit_group resumed>) = ? [pid 412] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 408] +++ exited with 0 +++ [pid 412] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=408, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 409] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 409] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 413 ./strace-static-x86_64: Process 413 attached [pid 412] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 411] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 410] <... write resumed>) = 1048576 [pid 412] <... write resumed>) = 1048576 [pid 411] <... write resumed>) = 1048576 [pid 409] <... openat resumed>) = 4 [pid 412] munmap(0x7f1ddd1fa000, 138412032 [pid 409] ioctl(4, LOOP_SET_FD, 3 [pid 412] <... munmap resumed>) = 0 [pid 412] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 410] munmap(0x7f1ddd1fa000, 138412032 [pid 409] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 412] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 410] <... munmap resumed>) = 0 [pid 409] ioctl(4, LOOP_CLR_FD [pid 412] ioctl(4, LOOP_CLR_FD) = 0 [pid 410] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 409] <... ioctl resumed>) = 0 [pid 410] <... openat resumed>) = 4 [pid 410] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 410] ioctl(4, LOOP_CLR_FD) = 0 [pid 412] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 412] close(4) = 0 [pid 409] ioctl(4, LOOP_SET_FD, 3 [pid 412] close(3 [pid 409] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 409] close(4) = 0 [pid 410] ioctl(4, LOOP_SET_FD, 3 [pid 409] close(3 [pid 412] <... close resumed>) = 0 [pid 410] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 409] <... close resumed>) = 0 [pid 412] chdir("./file0") = 0 [pid 410] close(4 [pid 412] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 410] <... close resumed>) = 0 [pid 412] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 410] close(3 [pid 412] <... mount resumed>) = 0 [pid 412] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 410] <... close resumed>) = 0 [pid 412] <... open resumed>) = 4 [pid 409] chdir("./file0" [pid 412] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 409] <... chdir resumed>) = 0 [pid 409] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 412] <... mmap resumed>) = 0x20000000 [pid 409] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 413] set_robust_list(0x55555671f660, 24 [pid 412] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 409] <... mount resumed>) = 0 [pid 413] <... set_robust_list resumed>) = 0 [pid 412] <... openat resumed>) = 5 [pid 409] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 412] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 413] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 412] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 409] <... open resumed>) = 4 [pid 413] <... prctl resumed>) = 0 [pid 410] chdir("./file0" [pid 409] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 413] setpgid(0, 0 [pid 412] exit_group(0 [pid 411] munmap(0x7f1ddd1fa000, 138412032 [pid 410] <... chdir resumed>) = 0 [pid 409] <... mmap resumed>) = 0x20000000 [pid 413] <... setpgid resumed>) = 0 [pid 410] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 413] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 410] <... open resumed>) = 3 [pid 409] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 413] <... openat resumed>) = 3 [pid 410] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 409] <... openat resumed>) = 5 [pid 413] write(3, "1000", 4 [pid 410] <... mount resumed>) = 0 [pid 409] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 413] <... write resumed>) = 4 [pid 410] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 409] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 413] close(3 [pid 410] <... open resumed>) = 4 [pid 409] exit_group(0 [pid 413] <... close resumed>) = 0 [pid 410] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 409] <... exit_group resumed>) = ? executing program [pid 413] write(1, "executing program\n", 18 [pid 412] <... exit_group resumed>) = ? [pid 411] <... munmap resumed>) = 0 [pid 410] <... mmap resumed>) = 0x20000000 [pid 409] +++ exited with 0 +++ [pid 413] <... write resumed>) = 18 [pid 410] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=409, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 413] memfd_create("syzkaller", 0 [pid 410] <... openat resumed>) = 5 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 413] <... memfd_create resumed>) = 3 [pid 412] +++ exited with 0 +++ [pid 410] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 411] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 413] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 411] <... openat resumed>) = 4 [pid 410] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=412, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 411] ioctl(4, LOOP_SET_FD, 3 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 411] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 413] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 411] ioctl(4, LOOP_CLR_FD [pid 410] exit_group(0 [pid 411] <... ioctl resumed>) = 0 [pid 413] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 410] <... exit_group resumed>) = ? [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 410] +++ exited with 0 +++ [pid 411] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=410, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 411] close(4 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 296] <... openat resumed>) = 3 [pid 411] <... close resumed>) = 0 [pid 299] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] <... openat resumed>) = 3 [pid 411] close(3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 299] close(3 [pid 296] <... close resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 415 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 416 ./strace-static-x86_64: Process 416 attached [pid 416] set_robust_list(0x55555671f660, 24) = 0 [pid 416] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 411] <... close resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 411] chdir("./file0" [pid 295] close(3 [pid 411] <... chdir resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 411] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 416] <... prctl resumed>) = 0 [pid 416] setpgid(0, 0 [pid 411] <... open resumed>) = 3 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 417 [pid 411] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 411] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 411] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 416] <... setpgid resumed>) = 0 [pid 416] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 411] <... mmap resumed>) = 0x20000000 [pid 411] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 411] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 416] write(3, "1000", 4 [pid 411] exit_group(0) = ? [pid 416] <... write resumed>) = 4 [pid 416] close(3) = 0 [pid 416] write(1, "executing program\n", 18executing program [pid 411] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=411, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 416] <... write resumed>) = 18 [pid 416] memfd_create("syzkaller", 0) = 3 [pid 416] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 417 attached ./strace-static-x86_64: Process 415 attached [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 417] set_robust_list(0x55555671f660, 24 [pid 415] set_robust_list(0x55555671f660, 24 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 417] <... set_robust_list resumed>) = 0 [pid 415] <... set_robust_list resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 418 [pid 417] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 415] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 417] <... prctl resumed>) = 0 [pid 415] <... prctl resumed>) = 0 [pid 417] setpgid(0, 0 [pid 415] setpgid(0, 0 [pid 413] <... write resumed>) = 1048576 [pid 417] <... setpgid resumed>) = 0 [pid 415] <... setpgid resumed>) = 0 [pid 417] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 415] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program executing program [pid 417] <... openat resumed>) = 3 [pid 415] <... openat resumed>) = 3 [pid 417] write(3, "1000", 4 [pid 415] write(3, "1000", 4 [pid 417] <... write resumed>) = 4 [pid 415] <... write resumed>) = 4 [pid 417] close(3 [pid 415] close(3 [pid 417] <... close resumed>) = 0 [pid 415] <... close resumed>) = 0 [pid 417] write(1, "executing program\n", 18 [pid 415] write(1, "executing program\n", 18 [pid 417] <... write resumed>) = 18 [pid 415] <... write resumed>) = 18 [pid 417] memfd_create("syzkaller", 0 [pid 415] memfd_create("syzkaller", 0 [pid 417] <... memfd_create resumed>) = 3 [pid 415] <... memfd_create resumed>) = 3 [pid 417] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 415] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 417] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 415] <... mmap resumed>) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 418 attached [pid 418] set_robust_list(0x55555671f660, 24) = 0 [pid 418] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 418] setpgid(0, 0) = 0 [pid 418] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 418] write(3, "1000", 4) = 4 [pid 418] close(3) = 0 [pid 418] write(1, "executing program\n", 18executing program ) = 18 [pid 418] memfd_create("syzkaller", 0) = 3 [pid 418] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 413] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 413] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 417] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 413] ioctl(4, LOOP_SET_FD, 3 [pid 415] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 413] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 413] ioctl(4, LOOP_CLR_FD) = 0 [pid 415] <... write resumed>) = 1048576 [pid 413] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 413] close(4) = 0 [pid 413] close(3) = 0 [pid 416] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 413] chdir("./file0") = 0 [pid 413] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 413] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 413] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 413] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 416] <... write resumed>) = 1048576 [pid 413] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 413] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 413] exit_group(0) = ? [pid 418] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 413] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=413, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 415] munmap(0x7f1ddd1fa000, 138412032 [pid 417] <... write resumed>) = 1048576 [pid 415] <... munmap resumed>) = 0 [pid 417] munmap(0x7f1ddd1fa000, 138412032 [pid 415] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 417] <... munmap resumed>) = 0 [pid 417] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 415] <... openat resumed>) = 4 [pid 417] <... openat resumed>) = 4 [pid 415] ioctl(4, LOOP_SET_FD, 3 [pid 417] ioctl(4, LOOP_SET_FD, 3 [pid 415] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 417] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 415] ioctl(4, LOOP_CLR_FD [pid 417] ioctl(4, LOOP_CLR_FD [pid 415] <... ioctl resumed>) = 0 [pid 417] <... ioctl resumed>) = 0 [pid 415] ioctl(4, LOOP_SET_FD, 3 [pid 417] ioctl(4, LOOP_SET_FD, 3 [pid 415] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 417] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 415] close(4 [pid 417] close(4 [pid 415] <... close resumed>) = 0 [pid 417] <... close resumed>) = 0 [pid 415] close(3 [pid 417] close(3 [pid 416] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 416] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 416] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 416] ioctl(4, LOOP_CLR_FD) = 0 [pid 415] <... close resumed>) = 0 [pid 416] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 416] close(4) = 0 [pid 416] close(3 [pid 417] <... close resumed>) = 0 [pid 415] chdir("./file0" [pid 417] chdir("./file0") = 0 [pid 415] <... chdir resumed>) = 0 [pid 417] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 415] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 417] <... open resumed>) = 3 [pid 415] <... open resumed>) = 3 [pid 297] <... restart_syscall resumed>) = 0 [pid 417] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 415] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 417] <... mount resumed>) = 0 [pid 415] <... mount resumed>) = 0 [pid 297] <... openat resumed>) = 3 [pid 417] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 415] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] ioctl(3, LOOP_CLR_FD [pid 417] <... open resumed>) = 4 [pid 415] <... open resumed>) = 4 [pid 297] <... ioctl resumed>) = 0 [pid 417] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 297] close(3 [pid 415] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 415] <... mmap resumed>) = 0x20000000 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 419 [pid 415] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 417] <... mmap resumed>) = 0x20000000 [pid 415] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 417] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 415] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 417] <... openat resumed>) = 5 [pid 415] exit_group(0 [pid 417] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 415] <... exit_group resumed>) = ? [pid 417] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 415] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=415, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 417] exit_group(0 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 417] <... exit_group resumed>) = ? [pid 417] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=417, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 416] <... close resumed>) = 0 [pid 418] <... write resumed>) = 1048576 [pid 418] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 418] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 420 [pid 418] <... openat resumed>) = 4 [pid 295] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 419 attached ./strace-static-x86_64: Process 420 attached [pid 419] set_robust_list(0x55555671f660, 24 [pid 420] set_robust_list(0x55555671f660, 24 [pid 418] ioctl(4, LOOP_SET_FD, 3 [pid 416] chdir("./file0" [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 418] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 416] <... chdir resumed>) = 0 [pid 418] ioctl(4, LOOP_CLR_FD [pid 416] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 418] <... ioctl resumed>) = 0 [pid 416] <... open resumed>) = 3 [pid 416] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 295] <... openat resumed>) = 3 [pid 416] <... mount resumed>) = 0 [pid 416] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 416] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 418] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 418] close(4) = 0 [pid 418] close(3 [pid 420] <... set_robust_list resumed>) = 0 [pid 419] <... set_robust_list resumed>) = 0 [pid 418] <... close resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 419] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 295] <... ioctl resumed>) = 0 [pid 420] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 419] <... prctl resumed>) = 0 [pid 295] close(3 [pid 420] <... prctl resumed>) = 0 [pid 419] setpgid(0, 0 [pid 295] <... close resumed>) = 0 [pid 419] <... setpgid resumed>) = 0 [pid 420] setpgid(0, 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 419] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 416] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 420] <... setpgid resumed>) = 0 [pid 419] <... openat resumed>) = 3 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 421 [pid 419] write(3, "1000", 4 [pid 416] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 420] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 419] <... write resumed>) = 4 executing program executing program [pid 420] <... openat resumed>) = 3 [pid 419] close(3 [pid 416] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 420] write(3, "1000", 4 [pid 419] <... close resumed>) = 0 [pid 420] <... write resumed>) = 4 [pid 420] close(3 [pid 419] write(1, "executing program\n", 18 [pid 420] <... close resumed>) = 0 [pid 419] <... write resumed>) = 18 [pid 420] write(1, "executing program\n", 18) = 18 [pid 419] memfd_create("syzkaller", 0 [pid 416] exit_group(0 [pid 420] memfd_create("syzkaller", 0 [pid 419] <... memfd_create resumed>) = 3 [pid 418] chdir("./file0" [pid 416] <... exit_group resumed>) = ? [pid 420] <... memfd_create resumed>) = 3 [pid 419] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 420] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 419] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 418] <... chdir resumed>) = 0 [pid 416] +++ exited with 0 +++ [pid 418] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=416, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 418] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 418] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 418] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 418] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 418] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 418] exit_group(0) = ? [pid 418] +++ exited with 0 +++ [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=418, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 421 attached [pid 421] set_robust_list(0x55555671f660, 24) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] <... openat resumed>) = 3 [pid 299] <... ioctl resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] close(3 [pid 298] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 298] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... close resumed>) = 0 [pid 421] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 422 [pid 421] <... prctl resumed>) = 0 [pid 421] setpgid(0, 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 423 [pid 421] <... setpgid resumed>) = 0 [pid 421] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 421] write(3, "1000", 4) = 4 [pid 421] close(3) = 0 [pid 421] write(1, "executing program\n", 18executing program ) = 18 [pid 421] memfd_create("syzkaller", 0) = 3 [pid 421] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 420] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 419] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 422 attached [pid 422] set_robust_list(0x55555671f660, 24) = 0 [pid 422] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 422] setpgid(0, 0) = 0 [pid 422] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 423 attached [pid 423] set_robust_list(0x55555671f660, 24) = 0 [pid 423] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 422] <... openat resumed>) = 3 [pid 422] write(3, "1000", 4) = 4 [pid 422] close(3 [pid 423] <... prctl resumed>) = 0 [pid 422] <... close resumed>) = 0 [pid 422] write(1, "executing program\n", 18executing program ) = 18 [pid 422] memfd_create("syzkaller", 0) = 3 [pid 422] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 420] <... write resumed>) = 1048576 [pid 423] setpgid(0, 0 [pid 419] <... write resumed>) = 1048576 [pid 423] <... setpgid resumed>) = 0 [pid 423] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 419] munmap(0x7f1ddd1fa000, 138412032 [pid 423] <... openat resumed>) = 3 [pid 423] write(3, "1000", 4 [pid 420] munmap(0x7f1ddd1fa000, 138412032 [pid 419] <... munmap resumed>) = 0 [pid 423] <... write resumed>) = 4 [pid 423] close(3 [pid 419] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 423] <... close resumed>) = 0 executing program [pid 423] write(1, "executing program\n", 18 [pid 419] <... openat resumed>) = 4 [pid 423] <... write resumed>) = 18 [pid 420] <... munmap resumed>) = 0 [pid 423] memfd_create("syzkaller", 0 [pid 420] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 419] ioctl(4, LOOP_SET_FD, 3 [pid 423] <... memfd_create resumed>) = 3 [pid 423] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 420] <... openat resumed>) = 4 [pid 419] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 423] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 420] ioctl(4, LOOP_SET_FD, 3 [pid 419] ioctl(4, LOOP_CLR_FD [pid 421] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 423] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 420] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 419] <... ioctl resumed>) = 0 [pid 420] ioctl(4, LOOP_CLR_FD) = 0 [pid 419] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 419] close(4) = 0 [pid 419] close(3 [pid 422] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 420] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 419] <... close resumed>) = 0 [pid 420] close(4 [pid 419] chdir("./file0" [pid 420] <... close resumed>) = 0 [pid 420] close(3 [pid 419] <... chdir resumed>) = 0 [pid 421] <... write resumed>) = 1048576 [pid 421] munmap(0x7f1ddd1fa000, 138412032 [pid 420] <... close resumed>) = 0 [pid 419] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 421] <... munmap resumed>) = 0 [pid 421] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 421] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 422] <... write resumed>) = 1048576 [pid 421] ioctl(4, LOOP_CLR_FD) = 0 [pid 422] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 422] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 421] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 421] close(4 [pid 419] <... open resumed>) = 3 [pid 420] chdir("./file0" [pid 419] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 420] <... chdir resumed>) = 0 [pid 419] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 421] <... close resumed>) = 0 [pid 421] close(3 [pid 419] <... open resumed>) = 4 [pid 420] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 419] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 420] <... open resumed>) = 3 [pid 419] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 422] ioctl(4, LOOP_SET_FD, 3 [pid 420] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 419] <... openat resumed>) = 5 [pid 419] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 422] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 420] <... mount resumed>) = 0 [pid 419] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 420] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 419] exit_group(0 [pid 420] <... open resumed>) = 4 [pid 419] <... exit_group resumed>) = ? [pid 420] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 422] ioctl(4, LOOP_CLR_FD) = 0 [pid 419] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=419, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 420] <... mmap resumed>) = 0x20000000 [pid 422] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 422] close(4) = 0 [pid 422] close(3 [pid 423] <... write resumed>) = 1048576 [pid 420] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 423] munmap(0x7f1ddd1fa000, 138412032 [pid 420] <... openat resumed>) = 5 [pid 420] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 423] <... munmap resumed>) = 0 [pid 420] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 423] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 420] exit_group(0 [pid 423] <... openat resumed>) = 4 [pid 420] <... exit_group resumed>) = ? [pid 420] +++ exited with 0 +++ [pid 423] ioctl(4, LOOP_SET_FD, 3 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=420, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 421] <... close resumed>) = 0 [pid 421] chdir("./file0") = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 423] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 423] ioctl(4, LOOP_CLR_FD) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 423] ioctl(4, LOOP_SET_FD, 3 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 423] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 421] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 424 [pid 423] close(4) = 0 [pid 423] close(3 [pid 421] <... open resumed>) = 3 [pid 421] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 423] <... close resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 425 [pid 421] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 421] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 422] <... close resumed>) = 0 [pid 421] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 421] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 421] exit_group(0) = ? [pid 421] +++ exited with 0 +++ [pid 422] chdir("./file0") = 0 [pid 422] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 422] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 422] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=421, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 422] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 426 [pid 422] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 426 attached ./strace-static-x86_64: Process 424 attached [pid 423] chdir("./file0" [pid 426] set_robust_list(0x55555671f660, 24 [pid 423] <... chdir resumed>) = 0 [pid 426] <... set_robust_list resumed>) = 0 [pid 424] set_robust_list(0x55555671f660, 24 [pid 423] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 426] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 424] <... set_robust_list resumed>) = 0 [pid 423] <... open resumed>) = 3 [pid 426] <... prctl resumed>) = 0 [pid 423] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 423] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 424] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 426] setpgid(0, 0 [pid 423] <... open resumed>) = 4 [pid 426] <... setpgid resumed>) = 0 [pid 424] <... prctl resumed>) = 0 [pid 423] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0./strace-static-x86_64: Process 425 attached [pid 425] set_robust_list(0x55555671f660, 24) = 0 [pid 425] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 423] <... mmap resumed>) = 0x20000000 [pid 424] setpgid(0, 0 [pid 426] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 424] <... setpgid resumed>) = 0 [pid 423] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 425] setpgid(0, 0 [pid 423] <... openat resumed>) = 5 [pid 424] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 423] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 426] <... openat resumed>) = 3 [pid 426] write(3, "1000", 4 [pid 424] <... openat resumed>) = 3 [pid 423] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 426] <... write resumed>) = 4 [pid 424] write(3, "1000", 4 [pid 423] exit_group(0 [pid 426] close(3 [pid 424] <... write resumed>) = 4 [pid 423] <... exit_group resumed>) = ? [pid 426] <... close resumed>) = 0 [pid 424] close(3 [pid 425] <... setpgid resumed>) = 0 [pid 425] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 423] +++ exited with 0 +++ executing program [pid 426] write(1, "executing program\n", 18 [pid 424] <... close resumed>) = 0 [pid 426] <... write resumed>) = 18 [pid 424] write(1, "executing program\n", 18 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=423, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- executing program [pid 426] memfd_create("syzkaller", 0 [pid 424] <... write resumed>) = 18 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 425] write(3, "1000", 4 [pid 426] <... memfd_create resumed>) = 3 [pid 424] memfd_create("syzkaller", 0 [pid 426] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 424] <... memfd_create resumed>) = 3 [pid 422] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 426] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 424] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 425] <... write resumed>) = 4 [pid 425] close(3 [pid 422] <... openat resumed>) = 5 [pid 425] <... close resumed>) = 0 executing program [pid 425] write(1, "executing program\n", 18) = 18 [pid 425] memfd_create("syzkaller", 0 [pid 422] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 422] exit_group(0 [pid 425] <... memfd_create resumed>) = 3 [pid 422] <... exit_group resumed>) = ? [pid 425] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 424] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 422] +++ exited with 0 +++ [pid 298] <... restart_syscall resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=422, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 427 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 428 [pid 425] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 427 attached [pid 427] set_robust_list(0x55555671f660, 24 [pid 426] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 427] <... set_robust_list resumed>) = 0 [pid 427] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 427] setpgid(0, 0) = 0 [pid 427] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 427] write(3, "1000", 4) = 4 [pid 427] close(3) = 0 [pid 427] write(1, "executing program\n", 18executing program ) = 18 [pid 424] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 427] memfd_create("syzkaller", 0) = 3 [pid 427] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 428 attached [pid 428] set_robust_list(0x55555671f660, 24) = 0 [pid 428] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 425] <... write resumed>) = 1048576 [pid 428] <... prctl resumed>) = 0 [pid 427] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 428] setpgid(0, 0) = 0 [pid 425] munmap(0x7f1ddd1fa000, 138412032 [pid 428] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 428] write(3, "1000", 4) = 4 [pid 425] <... munmap resumed>) = 0 [pid 425] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 428] close(3) = 0 executing program [pid 428] write(1, "executing program\n", 18) = 18 [pid 428] memfd_create("syzkaller", 0 [pid 425] ioctl(4, LOOP_SET_FD, 3 [pid 428] <... memfd_create resumed>) = 3 [pid 428] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 424] <... write resumed>) = 1048576 [pid 425] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 425] ioctl(4, LOOP_CLR_FD) = 0 [pid 425] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 425] close(4) = 0 [pid 425] close(3) = 0 [pid 425] chdir("./file0") = 0 [pid 425] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 428] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 424] munmap(0x7f1ddd1fa000, 138412032 [pid 426] <... write resumed>) = 1048576 [pid 424] <... munmap resumed>) = 0 [pid 426] munmap(0x7f1ddd1fa000, 138412032 [pid 425] <... open resumed>) = 3 [pid 424] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 426] <... munmap resumed>) = 0 [pid 424] ioctl(4, LOOP_SET_FD, 3 [pid 426] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 424] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 424] ioctl(4, LOOP_CLR_FD [pid 426] <... openat resumed>) = 4 [pid 424] <... ioctl resumed>) = 0 [pid 426] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 425] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 425] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 426] ioctl(4, LOOP_CLR_FD) = 0 [pid 424] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 424] close(4) = 0 [pid 424] close(3 [pid 425] <... open resumed>) = 4 [pid 427] <... write resumed>) = 1048576 [pid 424] <... close resumed>) = 0 [pid 426] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 424] chdir("./file0" [pid 426] close(4) = 0 [pid 424] <... chdir resumed>) = 0 [pid 426] close(3 [pid 425] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 425] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 425] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 426] <... close resumed>) = 0 [pid 424] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 425] exit_group(0) = ? [pid 425] +++ exited with 0 +++ [pid 424] <... open resumed>) = 3 [pid 426] chdir("./file0" [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=425, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 427] munmap(0x7f1ddd1fa000, 138412032 [pid 426] <... chdir resumed>) = 0 [pid 424] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 296] <... restart_syscall resumed>) = 0 [pid 426] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 424] <... mount resumed>) = 0 [pid 424] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 426] <... open resumed>) = 3 [pid 426] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 424] <... open resumed>) = 4 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 424] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 296] <... ioctl resumed>) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 429 [pid 424] <... mmap resumed>) = 0x20000000 [pid 426] <... mount resumed>) = 0 [pid 424] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 426] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 427] <... munmap resumed>) = 0 [pid 427] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 427] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 427] ioctl(4, LOOP_CLR_FD [pid 426] <... open resumed>) = 4 [pid 426] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 424] <... openat resumed>) = 5 [pid 427] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 429 attached [pid 429] set_robust_list(0x55555671f660, 24) = 0 [pid 428] <... write resumed>) = 1048576 [pid 429] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 427] ioctl(4, LOOP_SET_FD, 3 [pid 426] <... mmap resumed>) = 0x20000000 [pid 424] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 428] munmap(0x7f1ddd1fa000, 138412032 [pid 426] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 424] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 426] <... openat resumed>) = 5 [pid 424] exit_group(0 [pid 426] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 424] <... exit_group resumed>) = ? [pid 427] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 427] close(4) = 0 [pid 427] close(3 [pid 426] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 424] +++ exited with 0 +++ [pid 428] <... munmap resumed>) = 0 [pid 428] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 426] exit_group(0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=424, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 426] <... exit_group resumed>) = ? [pid 428] <... openat resumed>) = 4 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 426] +++ exited with 0 +++ [pid 428] ioctl(4, LOOP_SET_FD, 3 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=426, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 428] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 428] ioctl(4, LOOP_CLR_FD [pid 297] <... restart_syscall resumed>) = 0 [pid 428] <... ioctl resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... restart_syscall resumed>) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 430 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 428] ioctl(4, LOOP_SET_FD, 3 [pid 295] <... openat resumed>) = 3 [pid 428] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 295] ioctl(3, LOOP_CLR_FD [pid 428] close(4 [pid 295] <... ioctl resumed>) = 0 [pid 428] <... close resumed>) = 0 [pid 295] close(3 [pid 428] close(3 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 431 [pid 427] <... close resumed>) = 0 [pid 427] chdir("./file0") = 0 [pid 427] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 428] <... close resumed>) = 0 [pid 427] <... open resumed>) = 3 [pid 427] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 429] <... prctl resumed>) = 0 [pid 427] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 429] setpgid(0, 0) = 0 [pid 429] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 427] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 429] <... openat resumed>) = 3 [pid 429] write(3, "1000", 4) = 4 [pid 429] close(3) = 0 [pid 429] write(1, "executing program\n", 18executing program ) = 18 [pid 429] memfd_create("syzkaller", 0) = 3 [pid 429] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 428] chdir("./file0"./strace-static-x86_64: Process 430 attached ) = 0 [pid 428] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 431 attached [pid 430] set_robust_list(0x55555671f660, 24 [pid 431] set_robust_list(0x55555671f660, 24 [pid 430] <... set_robust_list resumed>) = 0 [pid 428] <... open resumed>) = 3 [pid 431] <... set_robust_list resumed>) = 0 [pid 430] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 428] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 431] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 430] <... prctl resumed>) = 0 [pid 428] <... mount resumed>) = 0 [pid 431] <... prctl resumed>) = 0 [pid 430] setpgid(0, 0 [pid 428] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 431] setpgid(0, 0 [pid 430] <... setpgid resumed>) = 0 [pid 428] <... open resumed>) = 4 [pid 430] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 428] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 431] <... setpgid resumed>) = 0 [pid 427] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 430] <... openat resumed>) = 3 [pid 427] <... openat resumed>) = 5 [pid 427] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 430] write(3, "1000", 4 [pid 428] <... mmap resumed>) = 0x20000000 [pid 427] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 431] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 430] <... write resumed>) = 4 [pid 428] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000executing program [pid 431] <... openat resumed>) = 3 [pid 430] close(3 [pid 431] write(3, "1000", 4 [pid 428] <... openat resumed>) = 5 [pid 431] <... write resumed>) = 4 [pid 430] <... close resumed>) = 0 [pid 428] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 431] close(3 [pid 430] write(1, "executing program\n", 18 [pid 431] <... close resumed>) = 0 [pid 428] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 431] write(1, "executing program\n", 18 [pid 430] <... write resumed>) = 18 [pid 428] exit_group(0executing program [pid 431] <... write resumed>) = 18 [pid 430] memfd_create("syzkaller", 0 [pid 428] <... exit_group resumed>) = ? [pid 431] memfd_create("syzkaller", 0 [pid 430] <... memfd_create resumed>) = 3 [pid 427] exit_group(0) = ? [pid 431] <... memfd_create resumed>) = 3 [pid 430] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 428] +++ exited with 0 +++ [pid 427] +++ exited with 0 +++ [pid 431] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 430] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=428, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 431] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=427, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 429] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 432 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 433 [pid 429] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 432 attached [pid 432] set_robust_list(0x55555671f660, 24) = 0 [pid 431] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 432] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 432] setpgid(0, 0) = 0 [pid 432] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 430] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 433 attached [pid 432] <... openat resumed>) = 3 [pid 433] set_robust_list(0x55555671f660, 24) = 0 [pid 433] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 432] write(3, "1000", 4) = 4 [pid 433] <... prctl resumed>) = 0 [pid 433] setpgid(0, 0) = 0 [pid 432] close(3) = 0 [pid 432] write(1, "executing program\n", 18executing program ) = 18 [pid 432] memfd_create("syzkaller", 0) = 3 [pid 433] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 432] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 433] <... openat resumed>) = 3 [pid 430] <... write resumed>) = 1048576 [pid 433] write(3, "1000", 4) = 4 [pid 433] close(3) = 0 [pid 433] write(1, "executing program\n", 18executing program ) = 18 [pid 433] memfd_create("syzkaller", 0) = 3 [pid 433] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 431] <... write resumed>) = 1048576 [pid 429] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 429] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 429] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 429] ioctl(4, LOOP_CLR_FD) = 0 [pid 431] munmap(0x7f1ddd1fa000, 138412032 [pid 430] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 431] <... munmap resumed>) = 0 [pid 430] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 429] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 429] close(4) = 0 [pid 429] close(3 [pid 430] <... openat resumed>) = 4 [pid 431] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 430] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 431] <... openat resumed>) = 4 [pid 430] ioctl(4, LOOP_CLR_FD) = 0 [pid 431] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 431] ioctl(4, LOOP_CLR_FD) = 0 [pid 430] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 430] close(4) = 0 [pid 430] close(3 [pid 429] <... close resumed>) = 0 [pid 430] <... close resumed>) = 0 [pid 431] ioctl(4, LOOP_SET_FD, 3 [pid 430] chdir("./file0" [pid 431] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 431] close(4 [pid 430] <... chdir resumed>) = 0 [pid 431] <... close resumed>) = 0 [pid 430] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 431] close(3) = 0 [pid 430] <... open resumed>) = 3 [pid 431] chdir("./file0" [pid 430] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 431] <... chdir resumed>) = 0 [pid 431] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 430] <... mount resumed>) = 0 [pid 430] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 431] <... open resumed>) = 3 [pid 431] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 430] <... open resumed>) = 4 [pid 431] <... mount resumed>) = 0 [pid 430] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 431] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 431] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 430] <... mmap resumed>) = 0x20000000 [pid 431] <... mmap resumed>) = 0x20000000 [pid 430] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 431] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 430] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 431] <... openat resumed>) = 5 [pid 430] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 431] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 430] exit_group(0 [pid 431] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 430] <... exit_group resumed>) = ? [pid 429] chdir("./file0") = 0 [pid 429] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 430] +++ exited with 0 +++ [pid 431] exit_group(0) = ? [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=430, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 429] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 431] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=431, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 429] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 429] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 429] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 434 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 429] <... openat resumed>) = 5 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 435 [pid 429] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 429] exit_group(0) = ? [pid 429] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=429, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 432] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 433] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 434 attached ./strace-static-x86_64: Process 435 attached [pid 434] set_robust_list(0x55555671f660, 24 [pid 435] set_robust_list(0x55555671f660, 24 [pid 434] <... set_robust_list resumed>) = 0 [pid 435] <... set_robust_list resumed>) = 0 executing program executing program [pid 434] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 435] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 434] <... prctl resumed>) = 0 [pid 434] setpgid(0, 0 [pid 435] <... prctl resumed>) = 0 [pid 434] <... setpgid resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 435] setpgid(0, 0) = 0 [pid 434] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 435] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 296] <... openat resumed>) = 3 [pid 434] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 435] <... openat resumed>) = 3 [pid 296] close(3 [pid 434] write(3, "1000", 4 [pid 296] <... close resumed>) = 0 [pid 435] write(3, "1000", 4 [pid 434] <... write resumed>) = 4 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 435] <... write resumed>) = 4 [pid 434] close(3 [pid 435] close(3 [pid 434] <... close resumed>) = 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 436 [pid 435] <... close resumed>) = 0 [pid 434] write(1, "executing program\n", 18 [pid 435] write(1, "executing program\n", 18 [pid 434] <... write resumed>) = 18 [pid 435] <... write resumed>) = 18 [pid 435] memfd_create("syzkaller", 0 [pid 434] memfd_create("syzkaller", 0 [pid 435] <... memfd_create resumed>) = 3 [pid 435] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 434] <... memfd_create resumed>) = 3 [pid 435] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 434] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 433] <... write resumed>) = 1048576 [pid 432] <... write resumed>) = 1048576 [pid 432] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 432] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 434] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 432] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 432] ioctl(4, LOOP_CLR_FD) = 0 [pid 433] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 433] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 433] ioctl(4, LOOP_SET_FD, 3 [pid 432] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 432] close(4) = 0 [pid 432] close(3./strace-static-x86_64: Process 436 attached [pid 433] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 436] set_robust_list(0x55555671f660, 24) = 0 [pid 436] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 433] ioctl(4, LOOP_CLR_FD) = 0 [pid 432] <... close resumed>) = 0 [pid 436] <... prctl resumed>) = 0 [pid 435] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 432] chdir("./file0" [pid 433] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 433] close(4 [pid 436] setpgid(0, 0 [pid 433] <... close resumed>) = 0 [pid 433] close(3 [pid 432] <... chdir resumed>) = 0 [pid 433] <... close resumed>) = 0 [pid 432] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 436] <... setpgid resumed>) = 0 [pid 435] <... write resumed>) = 1048576 [pid 436] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 432] <... open resumed>) = 3 [pid 436] write(3, "1000", 4) = 4 [pid 432] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 432] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 432] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 433] chdir("./file0") = 0 [pid 434] <... write resumed>) = 1048576 [pid 436] close(3) = 0 executing program [pid 436] write(1, "executing program\n", 18) = 18 [pid 436] memfd_create("syzkaller", 0) = 3 [pid 436] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 433] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 433] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 433] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 433] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 432] <... mmap resumed>) = 0x20000000 [pid 432] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 432] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 432] exit_group(0) = ? [pid 433] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 433] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 433] exit_group(0) = ? [pid 432] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=432, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 433] +++ exited with 0 +++ [pid 434] munmap(0x7f1ddd1fa000, 138412032 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=433, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 434] <... munmap resumed>) = 0 [pid 435] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 435] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 435] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 298] <... restart_syscall resumed>) = 0 [pid 434] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 434] <... openat resumed>) = 4 [pid 298] <... openat resumed>) = 3 [pid 434] ioctl(4, LOOP_SET_FD, 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 434] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 298] close(3) = 0 [pid 434] ioctl(4, LOOP_CLR_FD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 435] ioctl(4, LOOP_CLR_FD) = 0 [pid 434] <... ioctl resumed>) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 437 ./strace-static-x86_64: Process 437 attached [pid 437] set_robust_list(0x55555671f660, 24) = 0 [pid 436] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 437] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 435] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 435] close(4) = 0 [pid 435] close(3 [pid 436] <... write resumed>) = 1048576 [pid 434] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 434] close(4) = 0 [pid 434] close(3 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 435] <... close resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 438 [pid 435] chdir("./file0") = 0 [pid 437] setpgid(0, 0 [pid 435] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 437] <... setpgid resumed>) = 0 [pid 437] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 434] <... close resumed>) = 0 [pid 435] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 437] <... openat resumed>) = 3 [pid 435] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 434] chdir("./file0") = 0 [pid 437] write(3, "1000", 4 [pid 435] <... open resumed>) = 4 [pid 434] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 437] <... write resumed>) = 4 [pid 437] close(3) = 0 [pid 437] write(1, "executing program\n", 18executing program [pid 435] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 437] <... write resumed>) = 18 [pid 437] memfd_create("syzkaller", 0 [pid 435] <... mmap resumed>) = 0x20000000 [pid 437] <... memfd_create resumed>) = 3 [pid 437] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 434] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 438 attached [pid 436] munmap(0x7f1ddd1fa000, 138412032 [pid 434] <... mount resumed>) = 0 [pid 438] set_robust_list(0x55555671f660, 24 [pid 434] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 438] <... set_robust_list resumed>) = 0 [pid 436] <... munmap resumed>) = 0 [pid 434] <... open resumed>) = 4 [pid 438] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 434] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 436] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 438] setpgid(0, 0 [pid 435] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 434] <... mmap resumed>) = 0x20000000 [pid 438] <... setpgid resumed>) = 0 [pid 436] <... openat resumed>) = 4 [pid 434] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 435] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 438] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 435] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 434] <... openat resumed>) = 5 [pid 438] <... openat resumed>) = 3 [pid 435] exit_group(0 [pid 438] write(3, "1000", 4 [pid 436] ioctl(4, LOOP_SET_FD, 3 [pid 434] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 438] <... write resumed>) = 4 [pid 436] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 438] close(3 [pid 436] ioctl(4, LOOP_CLR_FD [pid 434] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 438] <... close resumed>) = 0 [pid 436] <... ioctl resumed>) = 0 [pid 434] exit_group(0 [pid 438] write(1, "executing program\n", 18 [pid 434] <... exit_group resumed>) = ? [pid 438] <... write resumed>) = 18 executing program [pid 435] <... exit_group resumed>) = ? [pid 434] +++ exited with 0 +++ [pid 438] memfd_create("syzkaller", 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=434, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 438] <... memfd_create resumed>) = 3 [pid 438] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 436] ioctl(4, LOOP_SET_FD, 3 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 438] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 436] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 436] close(4) = 0 [pid 436] close(3 [pid 435] +++ exited with 0 +++ [pid 436] <... close resumed>) = 0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=435, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 437] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 436] chdir("./file0") = 0 [pid 436] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 436] <... open resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 436] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 297] <... ioctl resumed>) = 0 [pid 436] <... mount resumed>) = 0 [pid 297] close(3 [pid 436] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] <... close resumed>) = 0 [pid 436] <... open resumed>) = 4 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 439 [pid 436] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 295] <... restart_syscall resumed>) = 0 [pid 436] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 436] <... openat resumed>) = 5 [pid 436] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 295] <... openat resumed>) = 3 [pid 436] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 295] ioctl(3, LOOP_CLR_FD [pid 436] exit_group(0 [pid 295] <... ioctl resumed>) = 0 [pid 436] <... exit_group resumed>) = ? [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 440 [pid 436] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=436, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 438] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 441 ./strace-static-x86_64: Process 439 attached [pid 439] set_robust_list(0x55555671f660, 24 [pid 437] <... write resumed>) = 1048576 [pid 439] <... set_robust_list resumed>) = 0 [pid 439] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 439] setpgid(0, 0) = 0 [pid 439] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 439] write(3, "1000", 4) = 4 [pid 439] close(3) = 0 [pid 439] write(1, "executing program\n", 18executing program ) = 18 [pid 439] memfd_create("syzkaller", 0) = 3 ./strace-static-x86_64: Process 440 attached [pid 437] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 439] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 438] <... write resumed>) = 1048576 [pid 440] set_robust_list(0x55555671f660, 24) = 0 [pid 438] munmap(0x7f1ddd1fa000, 138412032 [pid 440] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 440] setpgid(0, 0 [pid 438] <... munmap resumed>) = 0 [pid 440] <... setpgid resumed>) = 0 [pid 437] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 440] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 438] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 440] <... openat resumed>) = 3 [pid 440] write(3, "1000", 4 [pid 438] <... openat resumed>) = 4 [pid 440] <... write resumed>) = 4 [pid 438] ioctl(4, LOOP_SET_FD, 3 [pid 440] close(3executing program ) = 0 [pid 438] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 440] write(1, "executing program\n", 18) = 18 [pid 438] ioctl(4, LOOP_CLR_FD [pid 440] memfd_create("syzkaller", 0 [pid 438] <... ioctl resumed>) = 0 [pid 440] <... memfd_create resumed>) = 3 [pid 440] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 437] <... openat resumed>) = 4 [pid 437] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 437] ioctl(4, LOOP_CLR_FD) = 0 [pid 438] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 437] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 437] close(4) = 0 [pid 437] close(3) = 0 ./strace-static-x86_64: Process 441 attached [pid 441] set_robust_list(0x55555671f660, 24 [pid 438] close(4) = 0 [pid 438] close(3 [pid 441] <... set_robust_list resumed>) = 0 [pid 441] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 441] setpgid(0, 0) = 0 [pid 441] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 441] write(3, "1000", 4) = 4 [pid 438] <... close resumed>) = 0 [pid 441] close(3) = 0 [pid 441] write(1, "executing program\n", 18executing program ) = 18 [pid 441] memfd_create("syzkaller", 0) = 3 [pid 441] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 440] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 438] chdir("./file0") = 0 [pid 438] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 438] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 438] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 438] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 437] chdir("./file0") = 0 [pid 437] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 438] <... mmap resumed>) = 0x20000000 [pid 437] <... open resumed>) = 3 [pid 437] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 437] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 437] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 438] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 438] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 438] exit_group(0) = ? [pid 437] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 437] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 438] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=438, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 437] exit_group(0) = ? [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 442 [pid 437] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=437, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 441] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 439] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 443 [pid 440] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 442 attached [pid 440] munmap(0x7f1ddd1fa000, 138412032 [pid 442] set_robust_list(0x55555671f660, 24 [pid 440] <... munmap resumed>) = 0 [pid 442] <... set_robust_list resumed>) = 0 [pid 440] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 442] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 440] ioctl(4, LOOP_SET_FD, 3 [pid 442] <... prctl resumed>) = 0 [pid 440] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 442] setpgid(0, 0 [pid 440] ioctl(4, LOOP_CLR_FD [pid 442] <... setpgid resumed>) = 0 [pid 440] <... ioctl resumed>) = 0 [pid 442] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program ) = 3 [pid 442] write(3, "1000", 4) = 4 [pid 442] close(3) = 0 [pid 442] write(1, "executing program\n", 18) = 18 [pid 442] memfd_create("syzkaller", 0) = 3 [pid 442] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 440] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 440] close(4) = 0 [pid 440] close(3 [pid 439] <... write resumed>) = 1048576 [pid 440] <... close resumed>) = 0 [pid 439] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 440] chdir("./file0") = 0 [pid 440] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 443 attached ) = 3 [pid 440] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 439] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 440] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 440] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 443] set_robust_list(0x55555671f660, 24 [pid 439] <... openat resumed>) = 4 [pid 443] <... set_robust_list resumed>) = 0 [pid 440] <... mmap resumed>) = 0x20000000 [pid 439] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 443] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 439] ioctl(4, LOOP_CLR_FD [pid 443] <... prctl resumed>) = 0 [pid 440] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 439] <... ioctl resumed>) = 0 [pid 440] <... openat resumed>) = 5 [pid 440] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 443] setpgid(0, 0 [pid 440] exit_group(0) = ? [pid 443] <... setpgid resumed>) = 0 [pid 443] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 443] write(3, "1000", 4 [pid 440] +++ exited with 0 +++ [pid 439] ioctl(4, LOOP_SET_FD, 3 [pid 443] <... write resumed>) = 4 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=440, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 439] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 443] close(3 [pid 439] close(4 [pid 443] <... close resumed>) = 0 [pid 439] <... close resumed>) = 0 [pid 443] write(1, "executing program\n", 18executing program [pid 441] <... write resumed>) = 1048576 [pid 439] close(3 [pid 443] <... write resumed>) = 18 [pid 443] memfd_create("syzkaller", 0 [pid 441] munmap(0x7f1ddd1fa000, 138412032 [pid 443] <... memfd_create resumed>) = 3 [pid 441] <... munmap resumed>) = 0 [pid 443] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 439] <... close resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 443] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 441] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 439] chdir("./file0" [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 444 [pid 442] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 441] <... openat resumed>) = 4 [pid 443] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 441] ioctl(4, LOOP_SET_FD, 3 [pid 439] <... chdir resumed>) = 0 [pid 441] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 439] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 441] ioctl(4, LOOP_CLR_FD [pid 439] <... open resumed>) = 3 [pid 441] <... ioctl resumed>) = 0 [pid 439] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 444 attached [pid 444] set_robust_list(0x55555671f660, 24 [pid 439] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 444] <... set_robust_list resumed>) = 0 [pid 444] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 444] setpgid(0, 0 [pid 439] <... open resumed>) = 4 [pid 444] <... setpgid resumed>) = 0 [pid 444] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 439] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 441] ioctl(4, LOOP_SET_FD, 3 [pid 444] <... openat resumed>) = 3 [pid 444] write(3, "1000", 4) = 4 [pid 444] close(3) = 0 [pid 444] write(1, "executing program\n", 18 [pid 439] <... mmap resumed>) = 0x20000000 executing program [pid 441] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 444] <... write resumed>) = 18 [pid 444] memfd_create("syzkaller", 0 [pid 441] close(4 [pid 444] <... memfd_create resumed>) = 3 [pid 444] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 441] <... close resumed>) = 0 [pid 439] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 444] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 441] close(3 [pid 439] <... openat resumed>) = 5 [pid 442] <... write resumed>) = 1048576 [pid 442] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 442] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 442] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 442] ioctl(4, LOOP_CLR_FD) = 0 [pid 441] <... close resumed>) = 0 [pid 439] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 441] chdir("./file0" [pid 439] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 441] <... chdir resumed>) = 0 [pid 439] exit_group(0 [pid 441] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 439] <... exit_group resumed>) = ? [pid 442] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 441] <... open resumed>) = 3 [pid 442] close(4) = 0 [pid 442] close(3 [pid 439] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=439, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 441] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 441] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 441] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 441] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 443] <... write resumed>) = 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 441] <... openat resumed>) = 5 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 443] munmap(0x7f1ddd1fa000, 138412032 [pid 441] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 445 [pid 441] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 441] exit_group(0) = ? [pid 442] <... close resumed>) = 0 [pid 442] chdir("./file0") = 0 [pid 442] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 442] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 441] +++ exited with 0 +++ [pid 442] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 442] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=441, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 443] <... munmap resumed>) = 0 [pid 443] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 443] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 443] ioctl(4, LOOP_CLR_FD) = 0 [pid 442] <... mmap resumed>) = 0x20000000 [pid 442] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 296] <... restart_syscall resumed>) = 0 [pid 442] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 442] exit_group(0) = ? [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 446 [pid 443] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 443] close(4 [pid 444] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 443] <... close resumed>) = 0 [pid 442] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=442, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 443] close(3 [pid 299] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 447 ./strace-static-x86_64: Process 446 attached [pid 446] set_robust_list(0x55555671f660, 24) = 0 [pid 446] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 446] setpgid(0, 0) = 0 [pid 446] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 446] write(3, "1000", 4 [pid 443] <... close resumed>) = 0 [pid 446] <... write resumed>) = 4 [pid 446] close(3executing program ) = 0 [pid 446] write(1, "executing program\n", 18) = 18 [pid 446] memfd_create("syzkaller", 0) = 3 [pid 446] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 443] chdir("./file0"./strace-static-x86_64: Process 445 attached ) = 0 [pid 445] set_robust_list(0x55555671f660, 24 [pid 443] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 445] <... set_robust_list resumed>) = 0 [pid 443] <... open resumed>) = 3 [pid 445] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 443] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 445] <... prctl resumed>) = 0 [pid 444] <... write resumed>) = 1048576 [pid 444] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 444] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 443] <... mount resumed>) = 0 [pid 444] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 444] ioctl(4, LOOP_CLR_FD) = 0 [pid 443] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 445] setpgid(0, 0./strace-static-x86_64: Process 447 attached [pid 447] set_robust_list(0x55555671f660, 24) = 0 [pid 447] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 447] setpgid(0, 0) = 0 [pid 443] <... open resumed>) = 4 [pid 444] ioctl(4, LOOP_SET_FD, 3 [pid 443] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 444] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 445] <... setpgid resumed>) = 0 [pid 444] close(4) = 0 [pid 444] close(3 [pid 443] <... mmap resumed>) = 0x20000000 [pid 445] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 447] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 445] <... openat resumed>) = 3 [pid 443] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 445] write(3, "1000", 4 [pid 447] <... openat resumed>) = 3 [pid 443] <... openat resumed>) = 5 [pid 445] <... write resumed>) = 4 [pid 447] write(3, "1000", 4) = 4 [pid 447] close(3executing program ) = 0 [pid 447] write(1, "executing program\n", 18) = 18 [pid 447] memfd_create("syzkaller", 0 [pid 445] close(3 [pid 443] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 445] <... close resumed>) = 0 executing program [pid 445] write(1, "executing program\n", 18 [pid 443] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 445] <... write resumed>) = 18 [pid 447] <... memfd_create resumed>) = 3 [pid 447] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 445] memfd_create("syzkaller", 0 [pid 443] exit_group(0 [pid 445] <... memfd_create resumed>) = 3 [pid 443] <... exit_group resumed>) = ? [pid 443] +++ exited with 0 +++ [pid 445] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=443, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 445] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 448 [pid 444] <... close resumed>) = 0 [pid 444] chdir("./file0") = 0 [pid 444] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 444] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 444] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 444] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 445] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 446] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 444] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 444] mount(NULL, 0x20002ac0, NULL, 0, NULL./strace-static-x86_64: Process 448 attached ) = -1 ENOENT (No such file or directory) [pid 444] exit_group(0) = ? [pid 448] set_robust_list(0x55555671f660, 24) = 0 [pid 448] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 448] setpgid(0, 0) = 0 [pid 448] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 448] write(3, "1000", 4) = 4 [pid 448] close(3 [pid 444] +++ exited with 0 +++ [pid 448] <... close resumed>) = 0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=444, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 448] write(1, "executing program\n", 18executing program ) = 18 [pid 448] memfd_create("syzkaller", 0) = 3 [pid 448] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 446] <... write resumed>) = 1048576 [pid 447] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 448] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 449 [pid 446] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 446] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 446] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 446] ioctl(4, LOOP_CLR_FD) = 0 [pid 448] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 447] <... write resumed>) = 1048576 [pid 446] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 446] close(4) = 0 [pid 446] close(3 [pid 445] <... write resumed>) = 1048576 [pid 445] munmap(0x7f1ddd1fa000, 138412032) = 0 ./strace-static-x86_64: Process 449 attached [pid 449] set_robust_list(0x55555671f660, 24 [pid 445] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 449] <... set_robust_list resumed>) = 0 [pid 449] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 449] setpgid(0, 0) = 0 [pid 449] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 445] <... openat resumed>) = 4 [pid 445] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 445] ioctl(4, LOOP_CLR_FD) = 0 [pid 449] <... openat resumed>) = 3 [pid 449] write(3, "1000", 4) = 4 [pid 449] close(3) = 0 [pid 449] write(1, "executing program\n", 18executing program ) = 18 [pid 446] <... close resumed>) = 0 [pid 449] memfd_create("syzkaller", 0) = 3 [pid 449] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 446] chdir("./file0") = 0 [pid 446] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 446] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 446] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 447] munmap(0x7f1ddd1fa000, 138412032 [pid 445] ioctl(4, LOOP_SET_FD, 3 [pid 446] <... open resumed>) = 4 [pid 445] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 445] close(4 [pid 446] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 445] <... close resumed>) = 0 [pid 447] <... munmap resumed>) = 0 [pid 445] close(3) = 0 [pid 447] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 447] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 447] ioctl(4, LOOP_CLR_FD [pid 446] <... mmap resumed>) = 0x20000000 [pid 447] <... ioctl resumed>) = 0 [pid 446] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 446] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 446] exit_group(0) = ? [pid 446] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=446, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 447] ioctl(4, LOOP_SET_FD, 3 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 447] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 447] close(4) = 0 [pid 447] close(3 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 450 [pid 447] <... close resumed>) = 0 [pid 448] <... write resumed>) = 1048576 [pid 445] chdir("./file0" [pid 447] chdir("./file0") = 0 [pid 447] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 445] <... chdir resumed>) = 0 [pid 447] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 447] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 447] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 445] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 447] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 450 attached [pid 450] set_robust_list(0x55555671f660, 24) = 0 [pid 450] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 450] setpgid(0, 0) = 0 [pid 450] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 447] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 450] write(3, "1000", 4) = 4 [pid 447] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 450] close(3) = 0 [pid 447] exit_group(0 [pid 450] write(1, "executing program\n", 18) = 18 [pid 450] memfd_create("syzkaller", 0 [pid 447] <... exit_group resumed>) = ? [pid 447] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=447, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 450] <... memfd_create resumed>) = 3 [pid 450] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 445] <... open resumed>) = 3 [pid 448] munmap(0x7f1ddd1fa000, 138412032 [pid 445] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 449] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 445] <... mount resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 445] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 448] <... munmap resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 451 [pid 445] <... open resumed>) = 4 [pid 448] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 445] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 448] <... openat resumed>) = 4 [pid 445] <... mmap resumed>) = 0x20000000 [pid 445] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 448] ioctl(4, LOOP_SET_FD, 3 [pid 445] <... openat resumed>) = 5 [pid 448] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 445] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 448] ioctl(4, LOOP_CLR_FD [pid 445] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 448] <... ioctl resumed>) = 0 [pid 445] exit_group(0) = ? [pid 445] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=445, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 448] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 448] close(4) = 0 [pid 448] close(3./strace-static-x86_64: Process 451 attached [pid 451] set_robust_list(0x55555671f660, 24) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 448] <... close resumed>) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 452 [pid 451] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 448] chdir("./file0" [pid 451] <... prctl resumed>) = 0 [pid 451] setpgid(0, 0) = 0 [pid 451] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 448] <... chdir resumed>) = 0 [pid 451] <... openat resumed>) = 3 [pid 448] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 451] write(3, "1000", 4) = 4 [pid 448] <... open resumed>) = 3 [pid 451] close(3) = 0 [pid 451] write(1, "executing program\n", 18executing program ) = 18 [pid 451] memfd_create("syzkaller", 0) = 3 [pid 448] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 451] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 449] <... write resumed>) = 1048576 [pid 448] <... mount resumed>) = 0 [pid 448] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 448] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 449] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 448] <... mmap resumed>) = 0x20000000 [pid 449] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 448] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 449] <... openat resumed>) = 4 [pid 449] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 449] ioctl(4, LOOP_CLR_FD) = 0 [pid 448] <... openat resumed>) = 5 [pid 448] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 450] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 449] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 449] close(4) = 0 [pid 449] close(3 [pid 448] exit_group(0./strace-static-x86_64: Process 452 attached ) = ? [pid 452] set_robust_list(0x55555671f660, 24 [pid 448] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=448, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 452] <... set_robust_list resumed>) = 0 [pid 452] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 452] setpgid(0, 0) = 0 [pid 452] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 452] write(3, "1000", 4) = 4 [pid 452] close(3) = 0 [pid 452] write(1, "executing program\n", 18executing program ) = 18 [pid 452] memfd_create("syzkaller", 0 [pid 449] <... close resumed>) = 0 [pid 451] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 452] <... memfd_create resumed>) = 3 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 453 [pid 449] chdir("./file0") = 0 [pid 449] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 452] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 449] <... open resumed>) = 3 [pid 449] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 449] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 449] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 452] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 449] <... mmap resumed>) = 0x20000000 [pid 450] <... write resumed>) = 1048576 [pid 449] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 449] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 449] exit_group(0) = ? [pid 449] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=449, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 450] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 452] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 450] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 450] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 450] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 453 attached [pid 453] set_robust_list(0x55555671f660, 24) = 0 [pid 453] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 453] setpgid(0, 0) = 0 [pid 453] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 453] write(3, "1000", 4) = 4 [pid 453] close(3) = 0 [pid 450] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 450] close(4) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 454 [pid 450] close(3) = 0 executing program [pid 453] write(1, "executing program\n", 18) = 18 [pid 453] memfd_create("syzkaller", 0) = 3 [pid 453] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 453] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 454 attached [pid 454] set_robust_list(0x55555671f660, 24) = 0 [pid 454] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 454] setpgid(0, 0) = 0 [pid 454] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 450] chdir("./file0") = 0 [pid 450] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 454] <... openat resumed>) = 3 [pid 450] <... open resumed>) = 3 [pid 450] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 454] write(3, "1000", 4) = 4 [pid 450] <... mount resumed>) = 0 [pid 454] close(3 [pid 450] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 450] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 454] <... close resumed>) = 0 [pid 454] write(1, "executing program\n", 18executing program ) = 18 [pid 454] memfd_create("syzkaller", 0 [pid 450] <... mmap resumed>) = 0x20000000 [pid 452] <... write resumed>) = 1048576 [pid 451] <... write resumed>) = 1048576 [pid 451] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 451] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 451] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 451] ioctl(4, LOOP_CLR_FD) = 0 [pid 450] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 454] <... memfd_create resumed>) = 3 [pid 450] <... openat resumed>) = 5 [pid 450] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 450] exit_group(0) = ? [pid 454] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 452] munmap(0x7f1ddd1fa000, 138412032 [pid 454] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 452] <... munmap resumed>) = 0 [pid 451] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 451] close(4) = 0 [pid 451] close(3) = 0 [pid 452] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 450] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=450, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 451] chdir("./file0" [pid 296] <... restart_syscall resumed>) = 0 [pid 451] <... chdir resumed>) = 0 [pid 451] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 451] <... open resumed>) = 3 [pid 451] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 451] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 455 [pid 451] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 452] ioctl(4, LOOP_SET_FD, 3 [pid 451] <... mmap resumed>) = 0x20000000 [pid 451] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 452] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 452] ioctl(4, LOOP_CLR_FD [pid 451] <... openat resumed>) = 5 [pid 452] <... ioctl resumed>) = 0 [pid 451] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 451] exit_group(0) = ? [pid 451] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=451, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 452] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) ./strace-static-x86_64: Process 455 attached [pid 452] close(4 [pid 455] set_robust_list(0x55555671f660, 24 [pid 452] <... close resumed>) = 0 [pid 455] <... set_robust_list resumed>) = 0 [pid 455] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 452] close(3 [pid 455] <... prctl resumed>) = 0 [pid 455] setpgid(0, 0) = 0 executing program [pid 455] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 453] <... write resumed>) = 1048576 [pid 455] <... openat resumed>) = 3 [pid 455] write(3, "1000", 4) = 4 [pid 455] close(3) = 0 [pid 455] write(1, "executing program\n", 18) = 18 [pid 452] <... close resumed>) = 0 [pid 455] memfd_create("syzkaller", 0) = 3 [pid 455] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 452] chdir("./file0") = 0 [pid 452] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 456 [pid 453] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 454] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 453] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 453] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 453] ioctl(4, LOOP_CLR_FD) = 0 [pid 452] <... open resumed>) = 3 [pid 452] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 453] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 453] close(4) = 0 [pid 453] close(3 [pid 452] <... mount resumed>) = 0 [pid 452] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 452] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 452] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 452] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 452] exit_group(0 [pid 453] <... close resumed>) = 0 [pid 453] chdir("./file0") = 0 [pid 453] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 453] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 452] <... exit_group resumed>) = ? [pid 453] <... mount resumed>) = 0 ./strace-static-x86_64: Process 456 attached [pid 456] set_robust_list(0x55555671f660, 24 [pid 453] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 456] <... set_robust_list resumed>) = 0 [pid 456] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 453] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 452] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=452, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 455] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 456] <... prctl resumed>) = 0 [pid 456] setpgid(0, 0) = 0 [pid 456] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 456] write(3, "1000", 4) = 4 [pid 456] close(3) = 0 [pid 456] write(1, "executing program\n", 18 [pid 454] <... write resumed>) = 1048576 executing program [pid 453] <... mmap resumed>) = 0x20000000 [pid 456] <... write resumed>) = 18 [pid 456] memfd_create("syzkaller", 0) = 3 [pid 456] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 454] munmap(0x7f1ddd1fa000, 138412032 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 454] <... munmap resumed>) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 457 [pid 453] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 453] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 453] exit_group(0) = ? [pid 454] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 454] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 454] ioctl(4, LOOP_CLR_FD) = 0 [pid 453] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=453, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 454] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 454] close(4) = 0 [pid 454] close(3 [pid 455] <... write resumed>) = 1048576 [pid 454] <... close resumed>) = 0 [pid 454] chdir("./file0") = 0 [pid 454] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 454] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 455] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 454] <... mount resumed>) = 0 [pid 454] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 455] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 454] <... open resumed>) = 4 [pid 455] <... openat resumed>) = 4 [pid 455] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 455] ioctl(4, LOOP_CLR_FD [pid 298] <... restart_syscall resumed>) = 0 [pid 454] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 458 [pid 455] <... ioctl resumed>) = 0 [pid 454] <... mmap resumed>) = 0x20000000 [pid 456] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 455] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 455] close(4) = 0 [pid 454] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 455] close(3./strace-static-x86_64: Process 457 attached [pid 454] <... openat resumed>) = 5 [pid 457] set_robust_list(0x55555671f660, 24 [pid 454] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 457] <... set_robust_list resumed>) = 0 [pid 454] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 457] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 454] exit_group(0 [pid 457] <... prctl resumed>) = 0 [pid 454] <... exit_group resumed>) = ? [pid 455] <... close resumed>) = 0 [pid 456] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 458 attached [pid 458] set_robust_list(0x55555671f660, 24) = 0 [pid 458] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 457] setpgid(0, 0 [pid 458] setpgid(0, 0) = 0 executing program [pid 457] <... setpgid resumed>) = 0 [pid 458] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 458] write(3, "1000", 4) = 4 [pid 458] close(3) = 0 [pid 455] chdir("./file0" [pid 458] write(1, "executing program\n", 18 [pid 455] <... chdir resumed>) = 0 [pid 458] <... write resumed>) = 18 [pid 454] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=454, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 457] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 455] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 457] <... openat resumed>) = 3 [pid 457] write(3, "1000", 4 [pid 458] memfd_create("syzkaller", 0 [pid 457] <... write resumed>) = 4 [pid 458] <... memfd_create resumed>) = 3 [pid 455] <... open resumed>) = 3 [pid 458] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 455] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 457] close(3) = 0 [pid 455] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 457] write(1, "executing program\n", 18 [pid 455] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 457] <... write resumed>) = 18 [pid 457] memfd_create("syzkaller", 0) = 3 [pid 457] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 455] <... mmap resumed>) = 0x20000000 [pid 455] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 455] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 459 [pid 455] exit_group(0) = ? [pid 457] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 455] +++ exited with 0 +++ [pid 456] munmap(0x7f1ddd1fa000, 138412032 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=455, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 456] <... munmap resumed>) = 0 [pid 456] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 456] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 456] ioctl(4, LOOP_CLR_FD) = 0 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 458] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 456] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 456] close(4) = 0 [pid 456] close(3) = 0 [pid 456] chdir("./file0") = 0 [pid 456] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 456] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 456] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 456] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 456] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 456] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 456] exit_group(0) = ? [pid 296] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 459 attached [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 460 [pid 459] set_robust_list(0x55555671f660, 24 [pid 456] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=456, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 459] <... set_robust_list resumed>) = 0 [pid 459] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 459] setpgid(0, 0) = 0 [pid 459] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 ./strace-static-x86_64: Process 460 attached [pid 460] set_robust_list(0x55555671f660, 24 [pid 459] write(3, "1000", 4 [pid 460] <... set_robust_list resumed>) = 0 [pid 460] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 459] <... write resumed>) = 4 [pid 460] <... prctl resumed>) = 0 [pid 460] setpgid(0, 0) = 0 [pid 460] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program [pid 459] close(3 [pid 458] <... write resumed>) = 1048576 [pid 460] <... openat resumed>) = 3 [pid 460] write(3, "1000", 4) = 4 [pid 460] close(3) = 0 [pid 460] write(1, "executing program\n", 18 [pid 458] munmap(0x7f1ddd1fa000, 138412032 [pid 460] <... write resumed>) = 18 [pid 458] <... munmap resumed>) = 0 [pid 460] memfd_create("syzkaller", 0 [pid 457] <... write resumed>) = 1048576 [pid 460] <... memfd_create resumed>) = 3 [pid 460] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 459] <... close resumed>) = 0 [pid 459] write(1, "executing program\n", 18 [pid 458] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 458] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program [pid 459] <... write resumed>) = 18 [pid 457] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 461 [pid 458] ioctl(4, LOOP_CLR_FD) = 0 [pid 459] memfd_create("syzkaller", 0 [pid 457] <... munmap resumed>) = 0 [pid 459] <... memfd_create resumed>) = 3 [pid 457] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 459] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 457] <... openat resumed>) = 4 [pid 458] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 458] close(4) = 0 [pid 458] close(3 [pid 459] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 458] <... close resumed>) = 0 [pid 457] ioctl(4, LOOP_SET_FD, 3 [pid 458] chdir("./file0") = 0 [pid 458] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 458] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 458] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 458] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program ) = 0x20000000 [pid 458] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 458] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 458] exit_group(0) = ? [pid 458] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=458, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 460] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 461 attached [pid 461] set_robust_list(0x55555671f660, 24) = 0 [pid 461] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 461] setpgid(0, 0) = 0 [pid 461] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 462 [pid 461] <... openat resumed>) = 3 [pid 461] write(3, "1000", 4) = 4 [pid 461] close(3) = 0 [pid 461] write(1, "executing program\n", 18) = 18 [pid 457] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 461] memfd_create("syzkaller", 0 [pid 457] ioctl(4, LOOP_CLR_FD [pid 461] <... memfd_create resumed>) = 3 [pid 461] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 457] <... ioctl resumed>) = 0 [pid 459] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 457] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 457] close(4) = 0 [pid 457] close(3) = 0 [pid 457] chdir("./file0") = 0 [pid 457] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 457] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 462 attached [pid 462] set_robust_list(0x55555671f660, 24) = 0 [pid 462] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 457] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 462] <... prctl resumed>) = 0 [pid 462] setpgid(0, 0) = 0 [pid 462] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 457] <... open resumed>) = 4 [pid 457] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 462] <... openat resumed>) = 3 [pid 462] write(3, "1000", 4) = 4 [pid 462] close(3 [pid 457] <... mmap resumed>) = 0x20000000 [pid 462] <... close resumed>) = 0 [pid 462] write(1, "executing program\n", 18executing program ) = 18 [pid 462] memfd_create("syzkaller", 0) = 3 [pid 462] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 457] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 462] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 457] <... openat resumed>) = 5 [pid 457] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 457] exit_group(0) = ? [pid 460] <... write resumed>) = 1048576 [pid 457] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=457, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 461] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 460] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 460] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 459] <... write resumed>) = 1048576 [pid 460] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 460] ioctl(4, LOOP_CLR_FD) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 459] munmap(0x7f1ddd1fa000, 138412032 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 459] <... munmap resumed>) = 0 [pid 459] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 463 [pid 460] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 460] close(4) = 0 [pid 460] close(3 [pid 459] <... openat resumed>) = 4 [pid 459] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 459] ioctl(4, LOOP_CLR_FD) = 0 [pid 460] <... close resumed>) = 0 ./strace-static-x86_64: Process 463 attached [pid 463] set_robust_list(0x55555671f660, 24) = 0 [pid 463] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 460] chdir("./file0" [pid 463] setpgid(0, 0 [pid 459] ioctl(4, LOOP_SET_FD, 3 [pid 460] <... chdir resumed>) = 0 [pid 460] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 463] <... setpgid resumed>) = 0 [pid 459] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 459] close(4 [pid 460] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 459] <... close resumed>) = 0 [pid 459] close(3 [pid 460] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 460] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 459] <... close resumed>) = 0 [pid 463] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 460] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 460] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 463] <... openat resumed>) = 3 [pid 459] chdir("./file0" [pid 460] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 460] exit_group(0) = ? [pid 463] write(3, "1000", 4 [pid 459] <... chdir resumed>) = 0 [pid 463] <... write resumed>) = 4 [pid 459] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 463] close(3 [pid 459] <... open resumed>) = 3 [pid 463] <... close resumed>) = 0 [pid 459] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 460] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=460, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 462] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 463] write(1, "executing program\n", 18 executing program [pid 459] <... mount resumed>) = 0 [pid 463] <... write resumed>) = 18 [pid 461] <... write resumed>) = 1048576 [pid 463] memfd_create("syzkaller", 0) = 3 [pid 459] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 462] <... write resumed>) = 1048576 [pid 461] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 461] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 461] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 461] ioctl(4, LOOP_CLR_FD) = 0 [pid 462] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 462] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 462] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 462] ioctl(4, LOOP_CLR_FD) = 0 [pid 463] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 461] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 461] close(4) = 0 [pid 461] close(3) = 0 [pid 463] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 461] chdir("./file0") = 0 [pid 461] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 464 [pid 461] <... open resumed>) = 3 [pid 461] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 461] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 459] <... open resumed>) = 4 ./strace-static-x86_64: Process 464 attached [pid 459] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 461] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 459] <... mmap resumed>) = 0x20000000 [pid 464] set_robust_list(0x55555671f660, 24 [pid 459] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 464] <... set_robust_list resumed>) = 0 [pid 459] <... openat resumed>) = 5 [pid 464] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 459] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 464] <... prctl resumed>) = 0 [pid 459] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 464] setpgid(0, 0 [pid 462] ioctl(4, LOOP_SET_FD, 3 [pid 459] exit_group(0 [pid 464] <... setpgid resumed>) = 0 [pid 459] <... exit_group resumed>) = ? [pid 464] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 462] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 459] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=459, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>executing program [pid 462] close(4) = 0 [pid 462] close(3 [pid 464] <... openat resumed>) = 3 [pid 464] write(3, "1000", 4) = 4 [pid 464] close(3) = 0 [pid 464] write(1, "executing program\n", 18) = 18 [pid 464] memfd_create("syzkaller", 0) = 3 [pid 464] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 462] <... close resumed>) = 0 [pid 461] <... mmap resumed>) = 0x20000000 [pid 461] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 461] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 461] exit_group(0) = ? [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 464] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] <... ioctl resumed>) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 465 [pid 461] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=461, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 462] chdir("./file0") = 0 [pid 462] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 466 [pid 462] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 462] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 462] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 465 attached [pid 465] set_robust_list(0x55555671f660, 24 [pid 462] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 462] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 462] exit_group(0) = ? [pid 465] <... set_robust_list resumed>) = 0 [pid 464] <... write resumed>) = 1048576 [pid 462] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=462, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 465] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 465] setpgid(0, 0) = 0 [pid 465] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 465] write(3, "1000", 4 [pid 464] munmap(0x7f1ddd1fa000, 138412032 [pid 465] <... write resumed>) = 4 [pid 465] close(3executing program ) = 0 [pid 465] write(1, "executing program\n", 18) = 18 [pid 465] memfd_create("syzkaller", 0) = 3 [pid 465] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 466 attached [pid 466] set_robust_list(0x55555671f660, 24) = 0 [pid 466] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 463] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 466] <... prctl resumed>) = 0 [pid 466] setpgid(0, 0) = 0 [pid 466] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 467 [pid 464] <... munmap resumed>) = 0 [pid 466] <... openat resumed>) = 3 [pid 466] write(3, "1000", 4) = 4 executing program [pid 466] close(3) = 0 [pid 466] write(1, "executing program\n", 18) = 18 [pid 466] memfd_create("syzkaller", 0) = 3 [pid 466] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 464] openat(AT_FDCWD, "/dev/loop1", O_RDWR./strace-static-x86_64: Process 467 attached ) = 4 [pid 467] set_robust_list(0x55555671f660, 24 [pid 464] ioctl(4, LOOP_SET_FD, 3 [pid 465] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 467] <... set_robust_list resumed>) = 0 [pid 464] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 463] <... write resumed>) = 1048576 [pid 463] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 464] ioctl(4, LOOP_CLR_FD [pid 467] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 464] <... ioctl resumed>) = 0 [pid 467] <... prctl resumed>) = 0 [pid 463] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 463] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 463] ioctl(4, LOOP_CLR_FD) = 0 [pid 467] setpgid(0, 0 [pid 464] ioctl(4, LOOP_SET_FD, 3 [pid 467] <... setpgid resumed>) = 0 [pid 464] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 467] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 464] close(4 [pid 467] <... openat resumed>) = 3 [pid 464] <... close resumed>) = 0 [pid 467] write(3, "1000", 4 [pid 464] close(3 [pid 467] <... write resumed>) = 4 [pid 463] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 463] close(4) = 0 [pid 463] close(3 [pid 464] <... close resumed>) = 0 [pid 467] close(3executing program ) = 0 [pid 464] chdir("./file0" [pid 467] write(1, "executing program\n", 18) = 18 [pid 464] <... chdir resumed>) = 0 [pid 467] memfd_create("syzkaller", 0 [pid 464] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 467] <... memfd_create resumed>) = 3 [pid 464] <... open resumed>) = 3 [pid 467] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 464] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 463] <... close resumed>) = 0 [pid 466] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 463] chdir("./file0") = 0 [pid 464] <... mount resumed>) = 0 [pid 463] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 465] <... write resumed>) = 1048576 [pid 464] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 464] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 463] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 463] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 463] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 464] <... mmap resumed>) = 0x20000000 [pid 464] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 464] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 464] exit_group(0) = ? [pid 463] <... mmap resumed>) = 0x20000000 [pid 463] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 464] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=464, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 463] <... openat resumed>) = 5 [pid 463] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 463] exit_group(0) = ? [pid 467] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 465] munmap(0x7f1ddd1fa000, 138412032 [pid 463] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=463, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 468 [pid 466] <... write resumed>) = 1048576 [pid 466] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 466] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 466] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 465] <... munmap resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 465] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 296] <... close resumed>) = 0 [pid 465] ioctl(4, LOOP_SET_FD, 3 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 466] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 468 attached [pid 465] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 469 [pid 465] ioctl(4, LOOP_CLR_FD) = 0 [pid 468] set_robust_list(0x55555671f660, 24) = 0 [pid 468] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 466] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 466] close(4) = 0 [pid 466] close(3 [pid 467] <... write resumed>) = 1048576 [pid 468] setpgid(0, 0) = 0 [pid 468] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 468] write(3, "1000", 4 [pid 467] munmap(0x7f1ddd1fa000, 138412032 [pid 465] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 465] close(4) = 0 [pid 465] close(3 [pid 468] <... write resumed>) = 4 [pid 468] close(3) = 0 [pid 468] write(1, "executing program\n", 18executing program ) = 18 [pid 468] memfd_create("syzkaller", 0) = 3 [pid 468] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 465] <... close resumed>) = 0 [pid 467] <... munmap resumed>) = 0 [pid 465] chdir("./file0") = 0 [pid 467] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 465] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 465] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 467] <... openat resumed>) = 4 [pid 467] ioctl(4, LOOP_SET_FD, 3 [pid 465] <... mount resumed>) = 0 [pid 465] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 467] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 465] <... open resumed>) = 4 [pid 467] ioctl(4, LOOP_CLR_FD [pid 465] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 467] <... ioctl resumed>) = 0 [pid 466] <... close resumed>) = 0 [pid 465] <... mmap resumed>) = 0x20000000 [pid 465] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 465] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 465] exit_group(0) = ? [pid 466] chdir("./file0") = 0 [pid 466] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 465] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=465, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 466] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 466] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 469 attached ) = 4 [pid 469] set_robust_list(0x55555671f660, 24 [pid 466] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 469] <... set_robust_list resumed>) = 0 [pid 469] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 467] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 467] close(4) = 0 [pid 467] close(3) = 0 [pid 469] setpgid(0, 0) = 0 [pid 469] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 466] <... mmap resumed>) = 0x20000000 [pid 469] write(3, "1000", 4) = 4 [pid 467] chdir("./file0") = 0 [pid 467] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 469] close(3 [pid 467] <... open resumed>) = 3 [pid 467] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 467] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 467] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 469] <... close resumed>) = 0 [pid 469] write(1, "executing program\n", 18) = 18 [pid 469] memfd_create("syzkaller", 0) = 3 [pid 469] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 295] <... restart_syscall resumed>) = 0 [pid 467] <... mmap resumed>) = 0x20000000 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 470 [pid 466] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 466] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 466] exit_group(0) = ? [pid 466] +++ exited with 0 +++ [pid 467] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=466, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 467] <... openat resumed>) = 5 [pid 467] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 467] exit_group(0) = ? [pid 467] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=467, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 470 attached [pid 470] set_robust_list(0x55555671f660, 24 [pid 468] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 470] <... set_robust_list resumed>) = 0 [pid 470] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 470] setpgid(0, 0) = 0 [pid 470] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 470] write(3, "1000", 4executing program ) = 4 [pid 470] close(3) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 470] write(1, "executing program\n", 18) = 18 [pid 470] memfd_create("syzkaller", 0) = 3 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 470] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 471 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 472 [pid 469] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 470] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 472 attached [pid 472] set_robust_list(0x55555671f660, 24 [pid 469] <... write resumed>) = 1048576 [pid 472] <... set_robust_list resumed>) = 0 [pid 472] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 468] <... write resumed>) = 1048576 [pid 472] <... prctl resumed>) = 0 [pid 472] setpgid(0, 0) = 0 [pid 468] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 472] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 472] write(3, "1000", 4) = 4 [pid 472] close(3) = 0 [pid 468] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 472] write(1, "executing program\n", 18executing program ) = 18 [pid 472] memfd_create("syzkaller", 0 [pid 468] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 468] ioctl(4, LOOP_CLR_FD) = 0 [pid 472] <... memfd_create resumed>) = 3 [pid 472] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 468] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 468] close(4) = 0 [pid 468] close(3 [pid 470] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 471 attached [pid 470] munmap(0x7f1ddd1fa000, 138412032 [pid 471] set_robust_list(0x55555671f660, 24) = 0 [pid 471] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 471] setpgid(0, 0) = 0 [pid 471] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 470] <... munmap resumed>) = 0 [pid 471] write(3, "1000", 4executing program ) = 4 [pid 470] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 471] close(3) = 0 [pid 470] <... openat resumed>) = 4 [pid 471] write(1, "executing program\n", 18 [pid 470] ioctl(4, LOOP_SET_FD, 3 [pid 471] <... write resumed>) = 18 [pid 470] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 471] memfd_create("syzkaller", 0 [pid 470] ioctl(4, LOOP_CLR_FD [pid 471] <... memfd_create resumed>) = 3 [pid 470] <... ioctl resumed>) = 0 [pid 471] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 468] <... close resumed>) = 0 [pid 470] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 469] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 469] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 469] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 469] ioctl(4, LOOP_CLR_FD) = 0 [pid 468] chdir("./file0") = 0 [pid 468] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 471] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 470] close(4) = 0 [pid 470] close(3 [pid 469] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 469] close(4) = 0 [pid 468] <... open resumed>) = 3 [pid 469] close(3 [pid 470] <... close resumed>) = 0 [pid 468] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 468] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 468] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 468] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 470] chdir("./file0") = 0 [pid 468] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 468] exit_group(0) = ? [pid 468] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=468, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 471] <... write resumed>) = 1048576 [pid 470] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 470] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 470] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 471] munmap(0x7f1ddd1fa000, 138412032 [pid 470] <... open resumed>) = 4 [pid 470] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 469] <... close resumed>) = 0 [pid 469] chdir("./file0") = 0 [pid 469] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 470] <... mmap resumed>) = 0x20000000 [pid 470] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 470] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 297] <... restart_syscall resumed>) = 0 [pid 470] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 470] exit_group(0) = ? [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 473 [pid 470] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=470, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 469] <... open resumed>) = 3 [pid 472] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 469] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 469] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 469] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 471] <... munmap resumed>) = 0 [pid 471] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 471] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 471] ioctl(4, LOOP_CLR_FD) = 0 [pid 469] <... mmap resumed>) = 0x20000000 [pid 471] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 471] close(4) = 0 [pid 471] close(3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 474 [pid 469] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 469] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 471] <... close resumed>) = 0 [pid 469] exit_group(0) = ? [pid 469] +++ exited with 0 +++ [pid 471] chdir("./file0" [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=469, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 471] <... chdir resumed>) = 0 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 471] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 471] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 471] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 471] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 296] <... restart_syscall resumed>) = 0 [pid 471] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 474 attached ) = 5 [pid 471] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 474] set_robust_list(0x55555671f660, 24 [pid 471] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 474] <... set_robust_list resumed>) = 0 [pid 471] exit_group(0 [pid 296] <... openat resumed>) = 3 [pid 471] <... exit_group resumed>) = ? [pid 296] ioctl(3, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 473 attached [pid 473] set_robust_list(0x55555671f660, 24) = 0 [pid 473] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 473] setpgid(0, 0 [pid 471] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=471, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] close(3 [pid 474] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 474] <... prctl resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 474] setpgid(0, 0 [pid 473] <... setpgid resumed>) = 0 [pid 474] <... setpgid resumed>) = 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 475 [pid 473] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 474] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 474] write(3, "1000", 4executing program ) = 4 [pid 474] close(3) = 0 [pid 474] write(1, "executing program\n", 18) = 18 [pid 474] memfd_create("syzkaller", 0 [pid 473] <... openat resumed>) = 3 executing program [pid 474] <... memfd_create resumed>) = 3 [pid 474] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 473] write(3, "1000", 4 [pid 474] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 473] <... write resumed>) = 4 [pid 473] close(3) = 0 [pid 473] write(1, "executing program\n", 18) = 18 [pid 473] memfd_create("syzkaller", 0) = 3 [pid 473] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 472] <... write resumed>) = 1048576 [pid 472] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 476 [pid 472] <... munmap resumed>) = 0 [pid 472] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 472] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 472] ioctl(4, LOOP_CLR_FD [pid 474] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 472] <... ioctl resumed>) = 0 ./strace-static-x86_64: Process 475 attached [pid 475] set_robust_list(0x55555671f660, 24) = 0 [pid 472] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 472] close(4) = 0 [pid 472] close(3) = 0 ./strace-static-x86_64: Process 476 attached [pid 476] set_robust_list(0x55555671f660, 24) = 0 [pid 476] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 476] setpgid(0, 0 [pid 475] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 476] <... setpgid resumed>) = 0 [pid 476] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 476] write(3, "1000", 4) = 4 [pid 476] close(3) = 0 [pid 476] write(1, "executing program\n", 18executing program ) = 18 [pid 476] memfd_create("syzkaller", 0 [pid 472] chdir("./file0") = 0 [pid 472] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 476] <... memfd_create resumed>) = 3 [pid 476] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 475] <... prctl resumed>) = 0 [pid 476] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 472] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 475] setpgid(0, 0) = 0 [pid 472] <... mount resumed>) = 0 [pid 474] <... write resumed>) = 1048576 [pid 475] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 472] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 475] <... openat resumed>) = 3 [pid 474] munmap(0x7f1ddd1fa000, 138412032 [pid 475] write(3, "1000", 4) = 4 [pid 475] close(3) = 0 [pid 475] write(1, "executing program\n", 18executing program ) = 18 [pid 472] <... open resumed>) = 4 [pid 475] memfd_create("syzkaller", 0 [pid 472] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 475] <... memfd_create resumed>) = 3 [pid 475] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 472] <... mmap resumed>) = 0x20000000 [pid 473] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 472] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 472] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 472] exit_group(0) = ? [pid 472] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=472, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 474] <... munmap resumed>) = 0 [pid 474] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 476] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 477 [pid 473] <... write resumed>) = 1048576 [pid 473] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 473] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 473] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 473] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 477 attached [pid 474] ioctl(4, LOOP_SET_FD, 3 [pid 477] set_robust_list(0x55555671f660, 24) = 0 [pid 477] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 474] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 474] ioctl(4, LOOP_CLR_FD) = 0 [pid 473] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 473] close(4 [pid 475] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 473] <... close resumed>) = 0 [pid 473] close(3) = 0 [pid 476] <... write resumed>) = 1048576 [pid 477] setpgid(0, 0) = 0 [pid 477] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 474] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 474] close(4) = 0 [pid 474] close(3 [pid 477] write(3, "1000", 4) = 4 [pid 477] close(3) = 0 [pid 477] write(1, "executing program\n", 18executing program ) = 18 [pid 477] memfd_create("syzkaller", 0) = 3 [pid 477] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 474] <... close resumed>) = 0 [pid 473] chdir("./file0") = 0 [pid 473] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 474] chdir("./file0" [pid 476] munmap(0x7f1ddd1fa000, 138412032 [pid 474] <... chdir resumed>) = 0 [pid 474] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 476] <... munmap resumed>) = 0 [pid 474] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 476] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 474] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 476] <... openat resumed>) = 4 [pid 474] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 476] ioctl(4, LOOP_SET_FD, 3 [pid 473] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 475] <... write resumed>) = 1048576 [pid 473] <... mount resumed>) = 0 [pid 473] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 473] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 474] <... mmap resumed>) = 0x20000000 [pid 476] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 475] munmap(0x7f1ddd1fa000, 138412032 [pid 474] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 476] ioctl(4, LOOP_CLR_FD [pid 475] <... munmap resumed>) = 0 [pid 474] <... openat resumed>) = 5 [pid 476] <... ioctl resumed>) = 0 [pid 475] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 474] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 475] <... openat resumed>) = 4 [pid 474] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 475] ioctl(4, LOOP_SET_FD, 3 [pid 474] exit_group(0 [pid 475] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 474] <... exit_group resumed>) = ? [pid 475] ioctl(4, LOOP_CLR_FD [pid 473] <... mmap resumed>) = 0x20000000 [pid 474] +++ exited with 0 +++ [pid 475] <... ioctl resumed>) = 0 [pid 476] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 476] close(4 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=474, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 476] <... close resumed>) = 0 [pid 476] close(3 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 473] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 473] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 473] exit_group(0 [pid 475] ioctl(4, LOOP_SET_FD, 3 [pid 473] <... exit_group resumed>) = ? [pid 476] <... close resumed>) = 0 [pid 475] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 475] close(4 [pid 476] chdir("./file0" [pid 475] <... close resumed>) = 0 [pid 475] close(3 [pid 476] <... chdir resumed>) = 0 [pid 476] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 475] <... close resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 476] <... open resumed>) = 3 [pid 475] chdir("./file0" [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 479 [pid 473] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=473, si_uid=0, si_status=0, si_utime=1, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 479 attached [pid 479] set_robust_list(0x55555671f660, 24 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 480 [pid 479] <... set_robust_list resumed>) = 0 [pid 479] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 479] setpgid(0, 0) = 0 [pid 479] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 477] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 479] write(3, "1000", 4) = 4 [pid 476] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 475] <... chdir resumed>) = 0 [pid 476] <... mount resumed>) = 0 [pid 475] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 476] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 479] close(3 [pid 475] <... open resumed>) = 3 [pid 476] <... open resumed>) = 4 [pid 475] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 476] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 475] <... mount resumed>) = 0 [pid 479] <... close resumed>) = 0 executing program [pid 479] write(1, "executing program\n", 18) = 18 [pid 479] memfd_create("syzkaller", 0) = 3 [pid 476] <... mmap resumed>) = 0x20000000 [pid 475] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 476] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 475] <... open resumed>) = 4 [pid 476] <... openat resumed>) = 5 [pid 475] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 476] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 479] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 475] <... mmap resumed>) = 0x20000000 [pid 476] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 475] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 476] exit_group(0 [pid 475] <... openat resumed>) = 5 [pid 476] <... exit_group resumed>) = ? [pid 475] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 476] +++ exited with 0 +++ [pid 475] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=476, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 475] exit_group(0) = ? [pid 475] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=475, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 481 ./strace-static-x86_64: Process 480 attached [pid 480] set_robust_list(0x55555671f660, 24) = 0 [pid 480] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 480] setpgid(0, 0) = 0 [pid 480] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 296] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 481 attached [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 481] set_robust_list(0x55555671f660, 24 [pid 296] <... openat resumed>) = 3 [pid 481] <... set_robust_list resumed>) = 0 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 481] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 480] <... openat resumed>) = 3 [pid 480] write(3, "1000", 4 [pid 481] <... prctl resumed>) = 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 482 [pid 481] setpgid(0, 0 [pid 480] <... write resumed>) = 4 [pid 480] close(3) = 0 [pid 480] write(1, "executing program\n", 18executing program ) = 18 [pid 480] memfd_create("syzkaller", 0) = 3 [pid 480] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 481] <... setpgid resumed>) = 0 [pid 481] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 481] write(3, "1000", 4) = 4 [pid 481] close(3executing program ) = 0 [pid 481] write(1, "executing program\n", 18) = 18 [pid 481] memfd_create("syzkaller", 0) = 3 [pid 481] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 477] <... write resumed>) = 1048576 [pid 477] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 477] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 477] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 477] ioctl(4, LOOP_CLR_FD) = 0 [pid 479] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 477] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 477] close(4) = 0 [pid 477] close(3 [pid 481] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 477] <... close resumed>) = 0 [pid 477] chdir("./file0"./strace-static-x86_64: Process 482 attached [pid 481] <... write resumed>) = 1048576 [pid 480] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 479] <... write resumed>) = 1048576 executing program [pid 477] <... chdir resumed>) = 0 [pid 482] set_robust_list(0x55555671f660, 24) = 0 [pid 482] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 482] setpgid(0, 0) = 0 [pid 482] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 482] write(3, "1000", 4) = 4 [pid 482] close(3) = 0 [pid 482] write(1, "executing program\n", 18) = 18 [pid 482] memfd_create("syzkaller", 0) = 3 [pid 482] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 480] <... write resumed>) = 1048576 [pid 479] munmap(0x7f1ddd1fa000, 138412032 [pid 477] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 479] <... munmap resumed>) = 0 [pid 477] <... open resumed>) = 3 [pid 479] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 477] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 480] munmap(0x7f1ddd1fa000, 138412032 [pid 479] <... openat resumed>) = 4 [pid 479] ioctl(4, LOOP_SET_FD, 3 [pid 477] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 479] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 479] ioctl(4, LOOP_CLR_FD [pid 477] <... open resumed>) = 4 [pid 479] <... ioctl resumed>) = 0 [pid 477] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 477] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 477] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 479] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 477] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 479] close(4) = 0 [pid 477] exit_group(0 [pid 479] close(3 [pid 482] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 481] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 481] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 481] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 481] ioctl(4, LOOP_CLR_FD) = 0 [pid 479] <... close resumed>) = 0 [pid 477] <... exit_group resumed>) = ? [pid 477] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=477, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 481] ioctl(4, LOOP_SET_FD, 3 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 481] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 481] close(4) = 0 [pid 481] close(3 [pid 480] <... munmap resumed>) = 0 [pid 479] chdir("./file0" [pid 480] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 479] <... chdir resumed>) = 0 [pid 479] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 480] <... openat resumed>) = 4 [pid 479] <... open resumed>) = 3 [pid 479] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 480] ioctl(4, LOOP_SET_FD, 3 [pid 479] <... mount resumed>) = 0 [pid 480] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 479] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 480] ioctl(4, LOOP_CLR_FD [pid 479] <... open resumed>) = 4 [pid 480] <... ioctl resumed>) = 0 [pid 479] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 483 [pid 479] <... mmap resumed>) = 0x20000000 [pid 479] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 479] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 479] exit_group(0 [pid 480] ioctl(4, LOOP_SET_FD, 3 [pid 479] <... exit_group resumed>) = ? [pid 480] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 479] +++ exited with 0 +++ [pid 480] close(4 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=479, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 480] <... close resumed>) = 0 [pid 480] close(3 [pid 481] <... close resumed>) = 0 [pid 481] chdir("./file0") = 0 [pid 481] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 481] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 481] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 481] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 480] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 480] chdir("./file0" [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 484 ./strace-static-x86_64: Process 484 attached [pid 480] <... chdir resumed>) = 0 [pid 481] <... mmap resumed>) = 0x20000000 [pid 480] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 483 attached [pid 483] set_robust_list(0x55555671f660, 24 [pid 481] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 483] <... set_robust_list resumed>) = 0 [pid 483] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 480] <... open resumed>) = 3 [pid 483] <... prctl resumed>) = 0 [pid 483] setpgid(0, 0 [pid 481] <... openat resumed>) = 5 [pid 483] <... setpgid resumed>) = 0 [pid 481] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 484] set_robust_list(0x55555671f660, 24 [pid 480] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 481] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 481] exit_group(0) = ? [pid 480] <... mount resumed>) = 0 [pid 480] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 483] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 480] <... open resumed>) = 4 [pid 484] <... set_robust_list resumed>) = 0 [pid 480] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 484] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 480] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 484] <... prctl resumed>) = 0 [pid 483] <... openat resumed>) = 3 [pid 482] <... write resumed>) = 1048576 [pid 483] write(3, "1000", 4) = 4 [pid 483] close(3) = 0 [pid 482] munmap(0x7f1ddd1fa000, 138412032 [pid 480] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 484] setpgid(0, 0 [pid 480] <... mount resumed>) = -1 ENOENT (No such file or directory) executing program [pid 484] <... setpgid resumed>) = 0 [pid 483] write(1, "executing program\n", 18) = 18 [pid 483] memfd_create("syzkaller", 0 [pid 480] exit_group(0 [pid 484] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 480] <... exit_group resumed>) = ? [pid 483] <... memfd_create resumed>) = 3 [pid 482] <... munmap resumed>) = 0 [pid 482] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 483] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 482] <... openat resumed>) = 4 [pid 483] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 482] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 480] +++ exited with 0 +++ [pid 482] ioctl(4, LOOP_CLR_FD) = 0 [pid 481] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=480, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=481, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 484] <... openat resumed>) = 3 executing program [pid 484] write(3, "1000", 4) = 4 [pid 484] close(3) = 0 [pid 484] write(1, "executing program\n", 18 [pid 482] ioctl(4, LOOP_SET_FD, 3 [pid 484] <... write resumed>) = 18 [pid 482] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 482] close(4) = 0 [pid 482] close(3 [pid 484] memfd_create("syzkaller", 0 [pid 482] <... close resumed>) = 0 [pid 484] <... memfd_create resumed>) = 3 [pid 297] <... restart_syscall resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 484] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 482] chdir("./file0") = 0 [pid 482] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 482] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 482] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 482] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] close(3 [pid 299] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 482] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 482] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 482] exit_group(0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 485 [pid 482] <... exit_group resumed>) = ? [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 486 [pid 482] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=482, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 484] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 483] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 485 attached [pid 485] set_robust_list(0x55555671f660, 24) = 0 [pid 485] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 485] setpgid(0, 0) = 0 [pid 485] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 487 [pid 485] write(3, "1000", 4) = 4 [pid 485] close(3) = 0 [pid 485] write(1, "executing program\n", 18executing program ) = 18 [pid 485] memfd_create("syzkaller", 0) = 3 [pid 485] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 484] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 486 attached [pid 484] munmap(0x7f1ddd1fa000, 138412032 [pid 486] set_robust_list(0x55555671f660, 24) = 0 [pid 484] <... munmap resumed>) = 0 [pid 486] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 484] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 486] <... prctl resumed>) = 0 [pid 484] <... openat resumed>) = 4 [pid 486] setpgid(0, 0 [pid 484] ioctl(4, LOOP_SET_FD, 3 [pid 486] <... setpgid resumed>) = 0 [pid 484] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 486] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 484] ioctl(4, LOOP_CLR_FD [pid 486] <... openat resumed>) = 3 [pid 484] <... ioctl resumed>) = 0 [pid 486] write(3, "1000", 4) = 4 [pid 486] close(3) = 0 ./strace-static-x86_64: Process 487 attached [pid 486] write(1, "executing program\n", 18executing program ) = 18 [pid 483] <... write resumed>) = 1048576 [pid 486] memfd_create("syzkaller", 0 [pid 483] munmap(0x7f1ddd1fa000, 138412032 [pid 486] <... memfd_create resumed>) = 3 [pid 486] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 484] ioctl(4, LOOP_SET_FD, 3 [pid 486] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 484] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 487] set_robust_list(0x55555671f660, 24executing program [pid 485] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 487] <... set_robust_list resumed>) = 0 [pid 487] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 483] <... munmap resumed>) = 0 [pid 487] <... prctl resumed>) = 0 [pid 487] setpgid(0, 0) = 0 [pid 487] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 483] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 483] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 483] ioctl(4, LOOP_CLR_FD) = 0 [pid 487] <... openat resumed>) = 3 [pid 487] write(3, "1000", 4) = 4 [pid 487] close(3) = 0 [pid 487] write(1, "executing program\n", 18) = 18 [pid 487] memfd_create("syzkaller", 0) = 3 [pid 487] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 486] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 484] close(4 [pid 483] ioctl(4, LOOP_SET_FD, 3 [pid 484] <... close resumed>) = 0 [pid 484] close(3 [pid 483] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 483] close(4) = 0 [pid 483] close(3) = 0 [pid 484] <... close resumed>) = 0 [pid 484] chdir("./file0") = 0 [pid 484] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 484] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 484] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 484] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 483] chdir("./file0") = 0 [pid 484] <... mmap resumed>) = 0x20000000 [pid 483] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 484] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 483] <... open resumed>) = 3 [pid 483] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 483] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 484] <... openat resumed>) = 5 [pid 483] <... open resumed>) = 4 [pid 484] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 483] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 484] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 483] <... mmap resumed>) = 0x20000000 [pid 483] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 483] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 484] exit_group(0 [pid 483] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 484] <... exit_group resumed>) = ? [pid 483] exit_group(0) = ? [pid 484] +++ exited with 0 +++ [pid 483] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=483, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=484, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 485] <... write resumed>) = 1048576 [pid 487] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 485] munmap(0x7f1ddd1fa000, 138412032 [pid 486] <... write resumed>) = 1048576 [pid 486] munmap(0x7f1ddd1fa000, 138412032 [pid 485] <... munmap resumed>) = 0 [pid 486] <... munmap resumed>) = 0 [pid 485] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 486] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 485] <... openat resumed>) = 4 [pid 485] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 485] ioctl(4, LOOP_CLR_FD) = 0 [pid 486] <... openat resumed>) = 4 [pid 486] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 295] <... restart_syscall resumed>) = 0 [pid 486] ioctl(4, LOOP_CLR_FD [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 486] <... ioctl resumed>) = 0 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] <... openat resumed>) = 3 [pid 298] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] <... close resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 488 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 489 [pid 485] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 485] close(4) = 0 [pid 485] close(3 [pid 486] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 486] close(4) = 0 [pid 486] close(3) = 0 [pid 485] <... close resumed>) = 0 [pid 485] chdir("./file0") = 0 [pid 485] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 485] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 486] chdir("./file0" [pid 485] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 ./strace-static-x86_64: Process 489 attached [pid 489] set_robust_list(0x55555671f660, 24 [pid 486] <... chdir resumed>) = 0 [pid 485] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 486] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 488 attached [pid 489] <... set_robust_list resumed>) = 0 [pid 489] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 488] set_robust_list(0x55555671f660, 24 [pid 489] <... prctl resumed>) = 0 [pid 489] setpgid(0, 0) = 0 [pid 488] <... set_robust_list resumed>) = 0 [pid 486] <... open resumed>) = 3 [pid 485] <... mmap resumed>) = 0x20000000 [pid 489] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 488] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 486] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 487] <... write resumed>) = 1048576 [pid 489] write(3, "1000", 4 [pid 486] <... mount resumed>) = 0 [pid 489] <... write resumed>) = 4 [pid 489] close(3 [pid 487] munmap(0x7f1ddd1fa000, 138412032 [pid 489] <... close resumed>) = 0 [pid 488] <... prctl resumed>) = 0 [pid 486] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC executing program [pid 489] write(1, "executing program\n", 18) = 18 [pid 489] memfd_create("syzkaller", 0 [pid 488] setpgid(0, 0) = 0 [pid 486] <... open resumed>) = 4 [pid 489] <... memfd_create resumed>) = 3 [pid 489] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 487] <... munmap resumed>) = 0 [pid 487] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 486] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 488] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 487] <... openat resumed>) = 4 [pid 487] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 487] ioctl(4, LOOP_CLR_FD) = 0 [pid 486] <... mmap resumed>) = 0x20000000 [pid 488] <... openat resumed>) = 3 [pid 485] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 488] write(3, "1000", 4 [pid 485] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 488] <... write resumed>) = 4 [pid 486] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 485] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 489] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 488] close(3 [pid 486] <... openat resumed>) = 5 [pid 488] <... close resumed>) = 0 [pid 486] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 488] write(1, "executing program\n", 18 [pid 486] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 487] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 487] close(4) = 0 [pid 487] close(3executing program [pid 488] <... write resumed>) = 18 [pid 487] <... close resumed>) = 0 [pid 486] exit_group(0 [pid 485] exit_group(0) = ? [pid 488] memfd_create("syzkaller", 0 [pid 486] <... exit_group resumed>) = ? [pid 485] +++ exited with 0 +++ [pid 487] chdir("./file0") = 0 [pid 487] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 488] <... memfd_create resumed>) = 3 [pid 487] <... open resumed>) = 3 [pid 487] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 486] +++ exited with 0 +++ [pid 487] <... mount resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=485, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 488] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 487] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=486, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 488] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 487] <... open resumed>) = 4 [pid 487] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 487] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 487] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 487] exit_group(0) = ? [pid 487] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=487, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 299] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 299] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 299] close(3) = 0 [pid 297] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 490 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 491 [pid 489] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 490 attached [pid 490] set_robust_list(0x55555671f660, 24) = 0 [pid 490] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 490] setpgid(0, 0) = 0 [pid 490] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 489] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 490] <... openat resumed>) = 3 [pid 490] write(3, "1000", 4) = 4 [pid 490] close(3executing program ) = 0 [pid 490] write(1, "executing program\n", 18) = 18 [pid 489] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 490] memfd_create("syzkaller", 0 [pid 489] <... openat resumed>) = 4 [pid 489] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 489] ioctl(4, LOOP_CLR_FD [pid 490] <... memfd_create resumed>) = 3 [pid 489] <... ioctl resumed>) = 0 [pid 488] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 490] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 492 [pid 489] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 489] close(4) = 0 [pid 489] close(3 [pid 490] <... mmap resumed>) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 492 attached ./strace-static-x86_64: Process 491 attached [pid 489] <... close resumed>) = 0 [pid 488] <... write resumed>) = 1048576 [pid 492] set_robust_list(0x55555671f660, 24 [pid 491] set_robust_list(0x55555671f660, 24 [pid 489] chdir("./file0" [pid 492] <... set_robust_list resumed>) = 0 [pid 491] <... set_robust_list resumed>) = 0 [pid 489] <... chdir resumed>) = 0 [pid 492] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 491] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 489] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 488] munmap(0x7f1ddd1fa000, 138412032 [pid 492] <... prctl resumed>) = 0 [pid 491] <... prctl resumed>) = 0 [pid 489] <... open resumed>) = 3 [pid 492] setpgid(0, 0 [pid 491] setpgid(0, 0 [pid 489] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 492] <... setpgid resumed>) = 0 [pid 491] <... setpgid resumed>) = 0 [pid 489] <... mount resumed>) = 0 [pid 492] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 491] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 489] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 488] <... munmap resumed>) = 0 [pid 492] <... openat resumed>) = 3 [pid 491] <... openat resumed>) = 3 [pid 489] <... open resumed>) = 4 [pid 488] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 492] write(3, "1000", 4 [pid 491] write(3, "1000", 4 [pid 489] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 492] <... write resumed>) = 4 [pid 491] <... write resumed>) = 4 [pid 489] <... mmap resumed>) = 0x20000000 [pid 488] <... openat resumed>) = 4 [pid 492] close(3 [pid 491] close(3 [pid 489] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 492] <... close resumed>) = 0 [pid 491] <... close resumed>) = 0 [pid 489] <... openat resumed>) = 5 [pid 488] ioctl(4, LOOP_SET_FD, 3 [pid 492] write(1, "executing program\n", 18 [pid 491] write(1, "executing program\n", 18executing program executing program [pid 489] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 492] <... write resumed>) = 18 [pid 491] <... write resumed>) = 18 [pid 489] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 492] memfd_create("syzkaller", 0 [pid 491] memfd_create("syzkaller", 0 [pid 489] exit_group(0 [pid 488] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 492] <... memfd_create resumed>) = 3 [pid 491] <... memfd_create resumed>) = 3 [pid 489] <... exit_group resumed>) = ? [pid 488] ioctl(4, LOOP_CLR_FD [pid 492] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 491] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 489] +++ exited with 0 +++ [pid 488] <... ioctl resumed>) = 0 [pid 492] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 491] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=489, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 492] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 491] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 490] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 488] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 295] <... ioctl resumed>) = 0 [pid 488] close(4 [pid 295] close(3) = 0 [pid 488] <... close resumed>) = 0 [pid 488] close(3 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 488] <... close resumed>) = 0 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 493 [pid 488] chdir("./file0") = 0 [pid 488] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 488] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 488] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 488] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 488] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 488] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 488] exit_group(0) = ? [pid 488] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=488, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 492] <... write resumed>) = 1048576 [pid 491] <... write resumed>) = 1048576 [pid 490] <... write resumed>) = 1048576 [pid 490] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 493 attached [pid 493] set_robust_list(0x55555671f660, 24 [pid 490] <... munmap resumed>) = 0 [pid 490] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 493] <... set_robust_list resumed>) = 0 [pid 490] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 492] munmap(0x7f1ddd1fa000, 138412032 [pid 490] ioctl(4, LOOP_CLR_FD [pid 493] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 490] <... ioctl resumed>) = 0 [pid 493] <... prctl resumed>) = 0 [pid 492] <... munmap resumed>) = 0 [pid 491] munmap(0x7f1ddd1fa000, 138412032 [pid 492] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 493] setpgid(0, 0 [pid 492] <... openat resumed>) = 4 [pid 493] <... setpgid resumed>) = 0 [pid 492] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 492] ioctl(4, LOOP_CLR_FD) = 0 [pid 493] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 490] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 490] close(4) = 0 [pid 490] close(3 [pid 493] <... openat resumed>) = 3 [pid 493] write(3, "1000", 4) = 4 [pid 493] close(3) = 0 [pid 493] write(1, "executing program\n", 18executing program ) = 18 [pid 491] <... munmap resumed>) = 0 [pid 493] memfd_create("syzkaller", 0 [pid 492] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 492] close(4) = 0 [pid 492] close(3 [pid 493] <... memfd_create resumed>) = 3 [pid 493] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 491] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 491] ioctl(4, LOOP_SET_FD, 3 [pid 298] <... restart_syscall resumed>) = 0 [pid 491] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 491] ioctl(4, LOOP_CLR_FD [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 491] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 494 [pid 492] <... close resumed>) = 0 [pid 491] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 491] close(4) = 0 [pid 491] close(3 [pid 490] <... close resumed>) = 0 [pid 490] chdir("./file0") = 0 [pid 490] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 490] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 490] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 491] <... close resumed>) = 0 [pid 490] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 492] chdir("./file0") = 0 [pid 490] <... mmap resumed>) = 0x20000000 [pid 492] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 494 attached ) = 3 [pid 494] set_robust_list(0x55555671f660, 24 [pid 492] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 491] chdir("./file0" [pid 492] <... mount resumed>) = 0 [pid 494] <... set_robust_list resumed>) = 0 [pid 491] <... chdir resumed>) = 0 [pid 491] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 494] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 492] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 494] <... prctl resumed>) = 0 [pid 492] <... open resumed>) = 4 [pid 491] <... open resumed>) = 3 [pid 492] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 491] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 492] <... mmap resumed>) = 0x20000000 [pid 491] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 491] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 490] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 490] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 490] exit_group(0) = ? [pid 490] +++ exited with 0 +++ [pid 492] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=490, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 492] <... openat resumed>) = 5 [pid 491] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 492] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 491] <... openat resumed>) = 5 [pid 492] exit_group(0 [pid 491] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 492] <... exit_group resumed>) = ? [pid 492] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=492, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 491] exit_group(0) = ? [pid 491] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=491, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 494] setpgid(0, 0) = 0 [pid 494] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 494] write(3, "1000", 4) = 4 [pid 494] close(3 [pid 299] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 297] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 299] <... close resumed>) = 0 [pid 297] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 493] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 496 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 497 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 495 [pid 494] <... close resumed>) = 0 ./strace-static-x86_64: Process 495 attached [pid 494] write(1, "executing program\n", 18 [pid 495] set_robust_list(0x55555671f660, 24) = 0 executing program [pid 494] <... write resumed>) = 18 [pid 495] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 495] setpgid(0, 0) = 0 [pid 494] memfd_create("syzkaller", 0 [pid 495] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 494] <... memfd_create resumed>) = 3 [pid 495] <... openat resumed>) = 3 [pid 495] write(3, "1000", 4 [pid 494] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0./strace-static-x86_64: Process 496 attached [pid 495] <... write resumed>) = 4 [pid 495] close(3) = 0 [pid 496] set_robust_list(0x55555671f660, 24 [pid 494] <... mmap resumed>) = 0x7f1ddd1fa000 executing program [pid 495] write(1, "executing program\n", 18 [pid 496] <... set_robust_list resumed>) = 0 [pid 495] <... write resumed>) = 18 [pid 496] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 495] memfd_create("syzkaller", 0) = 3 [pid 496] <... prctl resumed>) = 0 [pid 496] setpgid(0, 0 [pid 495] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 496] <... setpgid resumed>) = 0 [pid 496] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 496] write(3, "1000", 4) = 4 [pid 496] close(3) = 0 [pid 496] write(1, "executing program\n", 18executing program ) = 18 [pid 496] memfd_create("syzkaller", 0) = 3 [pid 496] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 497 attached [pid 497] set_robust_list(0x55555671f660, 24 [pid 493] <... write resumed>) = 1048576 [pid 493] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 493] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 493] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 493] ioctl(4, LOOP_CLR_FD) = 0 [pid 494] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 493] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 493] close(4) = 0 [pid 493] close(3 [pid 497] <... set_robust_list resumed>) = 0 [pid 497] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 497] setpgid(0, 0) = 0 [pid 497] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 497] write(3, "1000", 4) = 4 [pid 497] close(3) = 0 [pid 497] write(1, "executing program\n", 18executing program ) = 18 [pid 497] memfd_create("syzkaller", 0) = 3 [pid 497] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 493] <... close resumed>) = 0 [pid 495] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 493] chdir("./file0") = 0 [pid 493] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 493] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 493] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 493] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 493] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 493] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 493] exit_group(0) = ? [pid 493] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=493, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 496] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 494] <... write resumed>) = 1048576 [pid 497] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 498 [pid 494] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 496] <... write resumed>) = 1048576 [pid 494] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 494] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 494] ioctl(4, LOOP_CLR_FD) = 0 [pid 495] <... write resumed>) = 1048576 [pid 495] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 495] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 495] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 495] ioctl(4, LOOP_CLR_FD) = 0 [pid 496] munmap(0x7f1ddd1fa000, 138412032) = 0 ./strace-static-x86_64: Process 498 attached [pid 496] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 498] set_robust_list(0x55555671f660, 24) = 0 [pid 494] ioctl(4, LOOP_SET_FD, 3 [pid 496] ioctl(4, LOOP_SET_FD, 3 [pid 494] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 495] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 495] close(4) = 0 [pid 495] close(3 [pid 494] close(4 [pid 497] <... write resumed>) = 1048576 [pid 496] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 496] ioctl(4, LOOP_CLR_FD) = 0 [pid 498] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 494] <... close resumed>) = 0 [pid 498] setpgid(0, 0) = 0 [pid 494] close(3 [pid 498] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 498] write(3, "1000", 4) = 4 [pid 498] close(3) = 0 [pid 498] write(1, "executing program\n", 18 [pid 496] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 496] close(4) = 0 [pid 496] close(3) = 0 executing program [pid 498] <... write resumed>) = 18 [pid 498] memfd_create("syzkaller", 0) = 3 [pid 498] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 494] <... close resumed>) = 0 [pid 494] chdir("./file0" [pid 497] munmap(0x7f1ddd1fa000, 138412032 [pid 495] <... close resumed>) = 0 [pid 495] chdir("./file0") = 0 [pid 495] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 494] <... chdir resumed>) = 0 [pid 495] <... open resumed>) = 3 [pid 495] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 497] <... munmap resumed>) = 0 [pid 495] <... mount resumed>) = 0 [pid 495] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 497] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 494] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 496] chdir("./file0") = 0 [pid 496] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 494] <... open resumed>) = 3 [pid 495] <... open resumed>) = 4 [pid 495] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 494] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 497] <... openat resumed>) = 4 [pid 496] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 494] <... mount resumed>) = 0 [pid 497] ioctl(4, LOOP_SET_FD, 3 [pid 496] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 496] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 494] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 494] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 497] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 495] <... mmap resumed>) = 0x20000000 [pid 494] <... mmap resumed>) = 0x20000000 [pid 495] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 497] ioctl(4, LOOP_CLR_FD [pid 494] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 495] <... openat resumed>) = 5 [pid 496] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 495] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 497] <... ioctl resumed>) = 0 [pid 496] <... openat resumed>) = 5 [pid 494] <... openat resumed>) = 5 [pid 495] exit_group(0 [pid 494] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 494] exit_group(0 [pid 495] <... exit_group resumed>) = ? [pid 494] <... exit_group resumed>) = ? [pid 495] +++ exited with 0 +++ [pid 494] +++ exited with 0 +++ [pid 496] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=495, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 497] ioctl(4, LOOP_SET_FD, 3 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=494, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 497] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 496] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 496] exit_group(0) = ? [pid 497] close(4) = 0 [pid 497] close(3 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] <... openat resumed>) = 3 [pid 299] <... ioctl resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] close(3 [pid 298] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 298] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 499 [pid 496] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=496, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 500 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 497] <... close resumed>) = 0 [pid 497] chdir("./file0" [pid 498] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 497] <... chdir resumed>) = 0 [pid 498] <... write resumed>) = 1048576 [pid 498] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 498] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 498] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 498] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 499 attached [pid 499] set_robust_list(0x55555671f660, 24) = 0 [pid 499] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 499] setpgid(0, 0) = 0 [pid 499] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 499] write(3, "1000", 4) = 4 [pid 499] close(3) = 0 [pid 499] write(1, "executing program\n", 18 [pid 498] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 498] close(4) = 0 [pid 498] close(3 [pid 497] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 501 executing program [pid 497] <... open resumed>) = 3 [pid 499] <... write resumed>) = 18 [pid 499] memfd_create("syzkaller", 0) = 3 [pid 499] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 498] <... close resumed>) = 0 [pid 497] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 498] chdir("./file0"./strace-static-x86_64: Process 501 attached ./strace-static-x86_64: Process 500 attached [pid 499] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 497] <... mount resumed>) = 0 [pid 500] set_robust_list(0x55555671f660, 24 [pid 497] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 500] <... set_robust_list resumed>) = 0 [pid 498] <... chdir resumed>) = 0 [pid 498] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 497] <... open resumed>) = 4 [pid 500] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 498] <... open resumed>) = 3 [pid 497] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 498] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 500] <... prctl resumed>) = 0 [pid 498] <... mount resumed>) = 0 [pid 498] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 498] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 500] setpgid(0, 0 [pid 497] <... mmap resumed>) = 0x20000000 [pid 501] set_robust_list(0x55555671f660, 24) = 0 [pid 501] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 501] setpgid(0, 0 [pid 500] <... setpgid resumed>) = 0 [pid 497] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 501] <... setpgid resumed>) = 0 [pid 501] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 500] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 498] <... mmap resumed>) = 0x20000000 [pid 497] <... openat resumed>) = 5 [pid 501] <... openat resumed>) = 3 [pid 500] write(3, "1000", 4 [pid 497] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 498] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 500] <... write resumed>) = 4 [pid 497] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 500] close(3 [pid 501] write(3, "1000", 4) = 4 [pid 501] close(3) = 0 executing program [pid 501] write(1, "executing program\n", 18) = 18 [pid 498] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 501] memfd_create("syzkaller", 0 [pid 500] <... close resumed>) = 0 executing program [pid 500] write(1, "executing program\n", 18 [pid 498] exit_group(0 [pid 497] exit_group(0 [pid 500] <... write resumed>) = 18 [pid 498] <... exit_group resumed>) = ? [pid 501] <... memfd_create resumed>) = 3 [pid 500] memfd_create("syzkaller", 0 [pid 497] <... exit_group resumed>) = ? [pid 500] <... memfd_create resumed>) = 3 [pid 498] +++ exited with 0 +++ [pid 497] +++ exited with 0 +++ [pid 501] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 500] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=497, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 500] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=498, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 502 [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 501] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 500] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 503 ./strace-static-x86_64: Process 502 attached [pid 502] set_robust_list(0x55555671f660, 24) = 0 [pid 502] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 502] setpgid(0, 0) = 0 [pid 502] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 502] write(3, "1000", 4) = 4 executing program [pid 502] close(3) = 0 [pid 502] write(1, "executing program\n", 18) = 18 [pid 502] memfd_create("syzkaller", 0) = 3 [pid 502] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 499] <... write resumed>) = 1048576 [pid 499] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 499] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 ./strace-static-x86_64: Process 503 attached [pid 499] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 499] ioctl(4, LOOP_CLR_FD) = 0 [pid 503] set_robust_list(0x55555671f660, 24) = 0 [pid 500] <... write resumed>) = 1048576 [pid 503] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 500] munmap(0x7f1ddd1fa000, 138412032 [pid 503] <... prctl resumed>) = 0 [pid 499] ioctl(4, LOOP_SET_FD, 3 [pid 503] setpgid(0, 0) = 0 [pid 503] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 499] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 499] close(4) = 0 [pid 499] close(3 [pid 503] <... openat resumed>) = 3 [pid 500] <... munmap resumed>) = 0 [pid 503] write(3, "1000", 4 [pid 500] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 503] <... write resumed>) = 4 [pid 503] close(3 [pid 500] <... openat resumed>) = 4 [pid 503] <... close resumed>) = 0 [pid 500] ioctl(4, LOOP_SET_FD, 3 [pid 503] write(1, "executing program\n", 18 [pid 500] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program [pid 503] <... write resumed>) = 18 [pid 500] ioctl(4, LOOP_CLR_FD [pid 503] memfd_create("syzkaller", 0 [pid 500] <... ioctl resumed>) = 0 [pid 503] <... memfd_create resumed>) = 3 [pid 503] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 501] <... write resumed>) = 1048576 [pid 499] <... close resumed>) = 0 [pid 501] munmap(0x7f1ddd1fa000, 138412032 [pid 500] ioctl(4, LOOP_SET_FD, 3 [pid 501] <... munmap resumed>) = 0 [pid 500] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 503] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 502] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 501] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 499] chdir("./file0" [pid 500] close(4) = 0 [pid 500] close(3 [pid 503] <... write resumed>) = 1048576 [pid 500] <... close resumed>) = 0 [pid 500] chdir("./file0") = 0 [pid 500] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 500] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 500] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 500] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 500] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 502] <... write resumed>) = 1048576 [pid 501] <... openat resumed>) = 4 [pid 499] <... chdir resumed>) = 0 [pid 501] ioctl(4, LOOP_SET_FD, 3 [pid 499] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 503] munmap(0x7f1ddd1fa000, 138412032 [pid 502] munmap(0x7f1ddd1fa000, 138412032 [pid 501] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 499] <... open resumed>) = 3 [pid 501] ioctl(4, LOOP_CLR_FD [pid 499] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 501] <... ioctl resumed>) = 0 [pid 499] <... mount resumed>) = 0 [pid 499] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 499] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 500] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 500] exit_group(0) = ? [pid 499] <... mmap resumed>) = 0x20000000 [pid 499] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 501] ioctl(4, LOOP_SET_FD, 3 [pid 499] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 501] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 499] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 501] close(4 [pid 499] exit_group(0 [pid 501] <... close resumed>) = 0 [pid 499] <... exit_group resumed>) = ? [pid 501] close(3 [pid 499] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=499, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 500] +++ exited with 0 +++ [pid 501] <... close resumed>) = 0 [pid 502] <... munmap resumed>) = 0 [pid 503] <... munmap resumed>) = 0 [pid 501] chdir("./file0" [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=500, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 503] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 502] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 503] <... openat resumed>) = 4 [pid 502] <... openat resumed>) = 4 [pid 501] <... chdir resumed>) = 0 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 503] ioctl(4, LOOP_SET_FD, 3 [pid 502] ioctl(4, LOOP_SET_FD, 3 [pid 501] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 503] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 502] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 501] <... open resumed>) = 3 [pid 502] ioctl(4, LOOP_CLR_FD [pid 503] ioctl(4, LOOP_CLR_FD [pid 501] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 502] <... ioctl resumed>) = 0 [pid 503] <... ioctl resumed>) = 0 [pid 501] <... mount resumed>) = 0 [pid 501] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 501] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 503] ioctl(4, LOOP_SET_FD, 3 [pid 502] ioctl(4, LOOP_SET_FD, 3 [pid 501] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 503] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 502] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 503] close(4 [pid 502] close(4 [pid 501] <... openat resumed>) = 5 [pid 503] <... close resumed>) = 0 [pid 502] <... close resumed>) = 0 [pid 501] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 503] close(3 [pid 502] close(3 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 501] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 298] ioctl(3, LOOP_CLR_FD [pid 501] exit_group(0 [pid 298] <... ioctl resumed>) = 0 [pid 501] <... exit_group resumed>) = ? [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 504 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 505 [pid 502] <... close resumed>) = 0 [pid 501] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=501, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 503] <... close resumed>) = 0 [pid 502] chdir("./file0"./strace-static-x86_64: Process 504 attached [pid 503] chdir("./file0" [pid 502] <... chdir resumed>) = 0 [pid 504] set_robust_list(0x55555671f660, 24 [pid 503] <... chdir resumed>) = 0 [pid 504] <... set_robust_list resumed>) = 0 [pid 502] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 505 attached [pid 503] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 504] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 502] <... open resumed>) = 3 [pid 503] <... open resumed>) = 3 [pid 504] <... prctl resumed>) = 0 [pid 502] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 505] set_robust_list(0x55555671f660, 24 [pid 504] setpgid(0, 0 [pid 503] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 502] <... mount resumed>) = 0 [pid 505] <... set_robust_list resumed>) = 0 [pid 504] <... setpgid resumed>) = 0 [pid 503] <... mount resumed>) = 0 [pid 502] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 503] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 504] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 502] <... open resumed>) = 4 [pid 503] <... open resumed>) = 4 [pid 504] <... openat resumed>) = 3 [pid 502] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 504] write(3, "1000", 4 [pid 503] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 502] <... mmap resumed>) = 0x20000000 [pid 505] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 504] <... write resumed>) = 4 [pid 503] <... mmap resumed>) = 0x20000000 [pid 502] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 503] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 503] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 502] <... openat resumed>) = 5 [pid 503] exit_group(0) = ? [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 506 [pid 502] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 502] exit_group(0) = ? ./strace-static-x86_64: Process 506 attached [pid 506] set_robust_list(0x55555671f660, 24 [pid 504] close(3) = 0 [pid 506] <... set_robust_list resumed>) = 0 executing program [pid 504] write(1, "executing program\n", 18) = 18 [pid 504] memfd_create("syzkaller", 0 [pid 506] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 504] <... memfd_create resumed>) = 3 [pid 506] <... prctl resumed>) = 0 [pid 504] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 506] setpgid(0, 0) = 0 [pid 506] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 503] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=503, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 506] <... openat resumed>) = 3 [pid 502] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=502, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 506] write(3, "1000", 4 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 506] <... write resumed>) = 4 [pid 505] <... prctl resumed>) = 0 [pid 505] setpgid(0, 0 [pid 506] close(3) = 0 [pid 505] <... setpgid resumed>) = 0 [pid 506] write(1, "executing program\n", 18executing program [pid 505] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 506] <... write resumed>) = 18 [pid 505] <... openat resumed>) = 3 [pid 506] memfd_create("syzkaller", 0 [pid 505] write(3, "1000", 4) = 4 [pid 505] close(3) = 0 executing program [pid 505] write(1, "executing program\n", 18) = 18 [pid 505] memfd_create("syzkaller", 0 [pid 506] <... memfd_create resumed>) = 3 [pid 504] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 506] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 505] <... memfd_create resumed>) = 3 [pid 505] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 506] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 507 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 508 [pid 505] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 507 attached [pid 507] set_robust_list(0x55555671f660, 24) = 0 [pid 507] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 508 attached ) = 0 [pid 507] setpgid(0, 0) = 0 [pid 508] set_robust_list(0x55555671f660, 24 [pid 507] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 508] <... set_robust_list resumed>) = 0 [pid 507] <... openat resumed>) = 3 [pid 507] write(3, "1000", 4) = 4 [pid 507] close(3) = 0 [pid 507] write(1, "executing program\n", 18executing program ) = 18 [pid 507] memfd_create("syzkaller", 0) = 3 [pid 508] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 507] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 508] <... prctl resumed>) = 0 [pid 508] setpgid(0, 0) = 0 [pid 508] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 508] write(3, "1000", 4) = 4 [pid 508] close(3) = 0 [pid 508] write(1, "executing program\n", 18executing program ) = 18 [pid 508] memfd_create("syzkaller", 0) = 3 [pid 508] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 507] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 506] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 504] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 506] <... write resumed>) = 1048576 [pid 504] <... write resumed>) = 1048576 [pid 505] <... write resumed>) = 1048576 [pid 508] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 506] munmap(0x7f1ddd1fa000, 138412032 [pid 504] munmap(0x7f1ddd1fa000, 138412032 [pid 506] <... munmap resumed>) = 0 [pid 504] <... munmap resumed>) = 0 [pid 506] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 504] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 504] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 506] <... openat resumed>) = 4 [pid 506] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 506] ioctl(4, LOOP_CLR_FD [pid 504] ioctl(4, LOOP_CLR_FD) = 0 [pid 505] munmap(0x7f1ddd1fa000, 138412032 [pid 506] <... ioctl resumed>) = 0 [pid 505] <... munmap resumed>) = 0 [pid 505] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 505] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 505] ioctl(4, LOOP_CLR_FD) = 0 [pid 504] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 504] close(4) = 0 [pid 504] close(3) = 0 [pid 505] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 505] close(4) = 0 [pid 505] close(3 [pid 506] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 506] close(4) = 0 [pid 506] close(3 [pid 505] <... close resumed>) = 0 [pid 504] chdir("./file0") = 0 [pid 504] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 507] <... write resumed>) = 1048576 [pid 504] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 504] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 504] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 505] chdir("./file0" [pid 504] <... mmap resumed>) = 0x20000000 [pid 505] <... chdir resumed>) = 0 [pid 505] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 505] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 507] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 505] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 505] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 507] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 507] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 507] ioctl(4, LOOP_CLR_FD) = 0 [pid 504] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 504] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 504] exit_group(0) = ? [pid 506] <... close resumed>) = 0 [pid 507] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 507] close(4) = 0 [pid 507] close(3) = 0 [pid 505] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 506] chdir("./file0") = 0 [pid 506] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 506] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 505] <... openat resumed>) = 5 [pid 505] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 505] exit_group(0) = ? [pid 506] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 506] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 504] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=504, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 506] <... mmap resumed>) = 0x20000000 [pid 505] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=505, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 507] chdir("./file0") = 0 [pid 507] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 507] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 507] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 507] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 508] <... write resumed>) = 1048576 [pid 508] munmap(0x7f1ddd1fa000, 138412032 [pid 506] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 508] <... munmap resumed>) = 0 [pid 508] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 506] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 507] <... mmap resumed>) = 0x20000000 [pid 507] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 507] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 507] exit_group(0) = ? [pid 507] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=507, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 508] <... openat resumed>) = 4 [pid 508] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 508] ioctl(4, LOOP_CLR_FD) = 0 [pid 506] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 506] exit_group(0) = ? [pid 506] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=506, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 508] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 508] close(4) = 0 [pid 508] close(3 [pid 298] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 297] close(3 [pid 296] close(3) = 0 [pid 298] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... restart_syscall resumed>) = 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 509 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 510 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 511 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 512 [pid 508] <... close resumed>) = 0 ./strace-static-x86_64: Process 511 attached [pid 511] set_robust_list(0x55555671f660, 24) = 0 executing program [pid 511] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 511] setpgid(0, 0) = 0 [pid 511] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 511] write(3, "1000", 4) = 4 [pid 511] close(3) = 0 [pid 511] write(1, "executing program\n", 18 [pid 508] chdir("./file0" [pid 511] <... write resumed>) = 18 [pid 508] <... chdir resumed>) = 0 [pid 511] memfd_create("syzkaller", 0 [pid 508] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 511] <... memfd_create resumed>) = 3 ./strace-static-x86_64: Process 512 attached [pid 512] set_robust_list(0x55555671f660, 24 [pid 511] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 512] <... set_robust_list resumed>) = 0 [pid 512] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 508] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 512] <... prctl resumed>) = 0 [pid 512] setpgid(0, 0) = 0 ./strace-static-x86_64: Process 510 attached ./strace-static-x86_64: Process 509 attached [pid 508] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 510] set_robust_list(0x55555671f660, 24 [pid 509] set_robust_list(0x55555671f660, 24 [pid 510] <... set_robust_list resumed>) = 0 [pid 508] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 512] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 510] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 512] <... openat resumed>) = 3 [pid 510] <... prctl resumed>) = 0 [pid 509] <... set_robust_list resumed>) = 0 [pid 510] setpgid(0, 0) = 0 [pid 509] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 512] write(3, "1000", 4) = 4 [pid 512] close(3 [pid 510] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 509] <... prctl resumed>) = 0 executing program [pid 512] <... close resumed>) = 0 [pid 512] write(1, "executing program\n", 18) = 18 [pid 512] memfd_create("syzkaller", 0) = 3 [pid 512] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 510] <... openat resumed>) = 3 [pid 512] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 510] write(3, "1000", 4 [pid 509] setpgid(0, 0 [pid 510] <... write resumed>) = 4 [pid 509] <... setpgid resumed>) = 0 [pid 510] close(3) = 0 [pid 509] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program [pid 510] write(1, "executing program\n", 18 [pid 509] <... openat resumed>) = 3 [pid 510] <... write resumed>) = 18 [pid 510] memfd_create("syzkaller", 0 [pid 509] write(3, "1000", 4 [pid 510] <... memfd_create resumed>) = 3 [pid 509] <... write resumed>) = 4 [pid 510] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 509] close(3 [pid 510] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 508] <... mmap resumed>) = 0x20000000 [pid 509] <... close resumed>) = 0 executing program [pid 509] write(1, "executing program\n", 18) = 18 [pid 508] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 508] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 509] memfd_create("syzkaller", 0 [pid 508] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 509] <... memfd_create resumed>) = 3 [pid 508] exit_group(0) = ? [pid 509] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 508] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=508, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 512] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 511] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 510] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 513 [pid 512] <... write resumed>) = 1048576 [pid 511] <... write resumed>) = 1048576 [pid 511] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 511] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 511] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 511] ioctl(4, LOOP_CLR_FD) = 0 [pid 512] munmap(0x7f1ddd1fa000, 138412032) = 0 ./strace-static-x86_64: Process 513 attached [pid 512] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 513] set_robust_list(0x55555671f660, 24 [pid 512] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 513] <... set_robust_list resumed>) = 0 [pid 513] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 511] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 509] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 511] close(4) = 0 [pid 511] close(3) = 0 [pid 512] ioctl(4, LOOP_CLR_FD) = 0 [pid 513] <... prctl resumed>) = 0 [pid 513] setpgid(0, 0) = 0 [pid 513] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 512] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 512] close(4) = 0 [pid 512] close(3 [pid 513] write(3, "1000", 4executing program ) = 4 [pid 513] close(3 [pid 512] <... close resumed>) = 0 [pid 511] chdir("./file0" [pid 510] <... write resumed>) = 1048576 [pid 509] <... write resumed>) = 1048576 [pid 513] <... close resumed>) = 0 [pid 512] chdir("./file0" [pid 511] <... chdir resumed>) = 0 [pid 513] write(1, "executing program\n", 18 [pid 512] <... chdir resumed>) = 0 [pid 511] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 513] <... write resumed>) = 18 [pid 512] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 511] <... open resumed>) = 3 [pid 513] memfd_create("syzkaller", 0 [pid 512] <... open resumed>) = 3 [pid 513] <... memfd_create resumed>) = 3 [pid 512] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 513] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 511] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 512] <... mount resumed>) = 0 [pid 513] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 511] <... mount resumed>) = 0 [pid 510] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 510] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 510] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 510] ioctl(4, LOOP_CLR_FD) = 0 [pid 509] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 509] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 509] ioctl(4, LOOP_SET_FD, 3 [pid 510] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 510] close(4) = 0 [pid 510] close(3 [pid 512] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 511] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 512] <... open resumed>) = 4 [pid 511] <... open resumed>) = 4 [pid 512] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 511] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 509] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 509] ioctl(4, LOOP_CLR_FD) = 0 [pid 512] <... mmap resumed>) = 0x20000000 [pid 511] <... mmap resumed>) = 0x20000000 [pid 512] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 511] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 512] <... openat resumed>) = 5 [pid 512] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 511] <... openat resumed>) = 5 [pid 512] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 511] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 512] exit_group(0 [pid 511] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 512] <... exit_group resumed>) = ? [pid 511] exit_group(0 [pid 509] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 509] close(4) = 0 [pid 509] close(3 [pid 512] +++ exited with 0 +++ [pid 511] <... exit_group resumed>) = ? [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=512, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 511] +++ exited with 0 +++ [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=511, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] close(3 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 299] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 514 [pid 513] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 509] <... close resumed>) = 0 [pid 510] <... close resumed>) = 0 [pid 510] chdir("./file0") = 0 [pid 510] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 510] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 510] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 510] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 510] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 509] chdir("./file0") = 0 [pid 510] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 509] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 510] exit_group(0) = ? [pid 509] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 515 [pid 509] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 509] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 510] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=510, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 509] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 509] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 513] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 514 attached [pid 513] munmap(0x7f1ddd1fa000, 138412032 [pid 514] set_robust_list(0x55555671f660, 24 [pid 509] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 514] <... set_robust_list resumed>) = 0 [pid 513] <... munmap resumed>) = 0 [pid 509] exit_group(0 [pid 514] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 513] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 514] <... prctl resumed>) = 0 [pid 513] <... openat resumed>) = 4 [pid 514] setpgid(0, 0 [pid 513] ioctl(4, LOOP_SET_FD, 3 [pid 514] <... setpgid resumed>) = 0 [pid 513] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 514] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 513] ioctl(4, LOOP_CLR_FD [pid 514] <... openat resumed>) = 3 [pid 513] <... ioctl resumed>) = 0 [pid 514] write(3, "1000", 4) = 4 executing program [pid 514] close(3) = 0 [pid 514] write(1, "executing program\n", 18) = 18 [pid 514] memfd_create("syzkaller", 0) = 3 [pid 514] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 509] <... exit_group resumed>) = ? [pid 509] +++ exited with 0 +++ ./strace-static-x86_64: Process 515 attached [pid 515] set_robust_list(0x55555671f660, 24) = 0 [pid 515] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 515] setpgid(0, 0) = 0 [pid 515] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 515] write(3, "1000", 4) = 4 [pid 515] close(3 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 516 executing program [pid 515] <... close resumed>) = 0 [pid 515] write(1, "executing program\n", 18) = 18 [pid 515] memfd_create("syzkaller", 0) = 3 [pid 515] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 514] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=509, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 513] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 513] close(4 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 513] <... close resumed>) = 0 [pid 296] <... openat resumed>) = 3 [pid 513] close(3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 513] <... close resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 513] chdir("./file0" [pid 296] close(3 [pid 513] <... chdir resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 513] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 517 [pid 513] <... open resumed>) = 3 [pid 513] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 513] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 513] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 516 attached [pid 516] set_robust_list(0x55555671f660, 24) = 0 [pid 516] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 516] setpgid(0, 0) = 0 [pid 516] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 516] write(3, "1000", 4) = 4 [pid 516] close(3) = 0 [pid 516] write(1, "executing program\n", 18executing program ) = 18 [pid 516] memfd_create("syzkaller", 0) = 3 [pid 516] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 513] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 513] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 513] exit_group(0) = ? [pid 515] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 513] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=513, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>executing program ) = 0 [pid 514] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 517 attached [pid 514] munmap(0x7f1ddd1fa000, 138412032 [pid 517] set_robust_list(0x55555671f660, 24 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 517] <... set_robust_list resumed>) = 0 [pid 514] <... munmap resumed>) = 0 [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 517] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 514] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 295] <... ioctl resumed>) = 0 [pid 517] <... prctl resumed>) = 0 [pid 514] <... openat resumed>) = 4 [pid 517] setpgid(0, 0 [pid 514] ioctl(4, LOOP_SET_FD, 3 [pid 295] close(3 [pid 517] <... setpgid resumed>) = 0 [pid 514] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 517] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 514] ioctl(4, LOOP_CLR_FD [pid 517] <... openat resumed>) = 3 [pid 514] <... ioctl resumed>) = 0 [pid 517] write(3, "1000", 4) = 4 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 518 [pid 517] close(3) = 0 [pid 517] write(1, "executing program\n", 18) = 18 [pid 517] memfd_create("syzkaller", 0) = 3 [pid 517] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 515] <... write resumed>) = 1048576 [pid 514] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 514] close(4) = 0 [pid 514] close(3 [pid 516] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 515] munmap(0x7f1ddd1fa000, 138412032 [pid 514] <... close resumed>) = 0 [pid 515] <... munmap resumed>) = 0 [pid 515] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 515] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 515] ioctl(4, LOOP_CLR_FD) = 0 [pid 515] ioctl(4, LOOP_SET_FD, 3 [pid 514] chdir("./file0" [pid 515] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 515] close(4) = 0 [pid 515] close(3 [pid 517] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 514] <... chdir resumed>) = 0 ./strace-static-x86_64: Process 518 attached [pid 514] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 518] set_robust_list(0x55555671f660, 24 [pid 514] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 518] <... set_robust_list resumed>) = 0 [pid 514] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 518] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 514] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 518] <... prctl resumed>) = 0 [pid 515] <... close resumed>) = 0 [pid 515] chdir("./file0") = 0 [pid 516] <... write resumed>) = 1048576 [pid 515] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 517] <... write resumed>) = 1048576 [pid 514] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 518] setpgid(0, 0 [pid 514] <... openat resumed>) = 5 [pid 518] <... setpgid resumed>) = 0 [pid 514] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 518] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 514] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 518] <... openat resumed>) = 3 [pid 514] exit_group(0 [pid 518] write(3, "1000", 4 [pid 514] <... exit_group resumed>) = ? [pid 518] <... write resumed>) = 4 [pid 515] <... open resumed>) = 3 [pid 515] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULLexecuting program [pid 514] +++ exited with 0 +++ [pid 518] close(3) = 0 [pid 518] write(1, "executing program\n", 18 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=514, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 518] <... write resumed>) = 18 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 518] memfd_create("syzkaller", 0) = 3 [pid 518] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 515] <... mount resumed>) = 0 [pid 515] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 515] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 516] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 516] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 515] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 516] <... openat resumed>) = 4 [pid 515] <... openat resumed>) = 5 [pid 516] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 516] ioctl(4, LOOP_CLR_FD) = 0 [pid 515] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 515] exit_group(0) = ? [pid 515] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=515, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 516] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 516] close(4) = 0 [pid 516] close(3 [pid 518] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 517] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 517] <... munmap resumed>) = 0 [pid 517] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 517] <... openat resumed>) = 4 [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 517] ioctl(4, LOOP_SET_FD, 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 517] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 517] ioctl(4, LOOP_CLR_FD [pid 299] close(3 [pid 297] close(3 [pid 517] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 519 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 520 [pid 517] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 517] close(4) = 0 [pid 517] close(3 [pid 516] <... close resumed>) = 0 [pid 516] chdir("./file0" [pid 517] <... close resumed>) = 0 [pid 517] chdir("./file0") = 0 [pid 517] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 516] <... chdir resumed>) = 0 [pid 517] <... open resumed>) = 3 [pid 516] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 517] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 516] <... open resumed>) = 3 ./strace-static-x86_64: Process 519 attached [pid 519] set_robust_list(0x55555671f660, 24) = 0 [pid 516] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 519] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 516] <... mount resumed>) = 0 [pid 517] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 519] <... prctl resumed>) = 0 [pid 517] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 516] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 519] setpgid(0, 0 [pid 517] <... mmap resumed>) = 0x20000000 [pid 519] <... setpgid resumed>) = 0 [pid 519] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 516] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 518] <... write resumed>) = 1048576 [pid 517] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 520 attached [pid 518] munmap(0x7f1ddd1fa000, 138412032 [pid 517] <... openat resumed>) = 5 [pid 520] set_robust_list(0x55555671f660, 24 [pid 517] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 520] <... set_robust_list resumed>) = 0 [pid 517] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 517] exit_group(0 [pid 520] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 517] <... exit_group resumed>) = ? [pid 519] <... openat resumed>) = 3 [pid 519] write(3, "1000", 4) = 4 [pid 519] close(3 [pid 517] +++ exited with 0 +++ [pid 520] <... prctl resumed>) = 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=517, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 520] setpgid(0, 0 [pid 518] <... munmap resumed>) = 0 [pid 519] <... close resumed>) = 0 executing program [pid 519] write(1, "executing program\n", 18) = 18 [pid 519] memfd_create("syzkaller", 0 [pid 516] <... mmap resumed>) = 0x20000000 [pid 519] <... memfd_create resumed>) = 3 [pid 519] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 520] <... setpgid resumed>) = 0 [pid 518] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 520] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 518] <... openat resumed>) = 4 executing program [pid 520] <... openat resumed>) = 3 [pid 518] ioctl(4, LOOP_SET_FD, 3 [pid 520] write(3, "1000", 4 [pid 518] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 520] <... write resumed>) = 4 [pid 518] ioctl(4, LOOP_CLR_FD [pid 516] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 520] close(3 [pid 518] <... ioctl resumed>) = 0 [pid 520] <... close resumed>) = 0 [pid 520] write(1, "executing program\n", 18) = 18 [pid 520] memfd_create("syzkaller", 0) = 3 [pid 520] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 516] <... openat resumed>) = 5 [pid 516] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 516] exit_group(0) = ? [pid 516] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=516, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 296] <... restart_syscall resumed>) = 0 [pid 518] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 518] close(4) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 518] close(3 [pid 296] <... openat resumed>) = 3 [pid 519] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 518] <... close resumed>) = 0 [pid 296] ioctl(3, LOOP_CLR_FD [pid 518] chdir("./file0" [pid 296] <... ioctl resumed>) = 0 [pid 518] <... chdir resumed>) = 0 [pid 296] close(3 [pid 518] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 521 [pid 518] <... open resumed>) = 3 [pid 518] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 520] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 518] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 522 [pid 518] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 519] <... write resumed>) = 1048576 [pid 519] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 519] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 518] <... mmap resumed>) = 0x20000000 [pid 519] <... openat resumed>) = 4 ./strace-static-x86_64: Process 521 attached [pid 521] set_robust_list(0x55555671f660, 24 [pid 519] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 519] ioctl(4, LOOP_CLR_FD [pid 521] <... set_robust_list resumed>) = 0 [pid 519] <... ioctl resumed>) = 0 [pid 521] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 521] setpgid(0, 0) = 0 [pid 521] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 521] write(3, "1000", 4 [pid 519] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 519] close(4) = 0 [pid 519] close(3 [pid 518] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 518] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 518] exit_group(0) = ? [pid 518] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=518, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 521] <... write resumed>) = 4 [pid 521] close(3) = 0 [pid 521] write(1, "executing program\n", 18executing program ) = 18 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 523 [pid 521] memfd_create("syzkaller", 0) = 3 [pid 521] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 520] <... write resumed>) = 1048576 [pid 519] <... close resumed>) = 0 ./strace-static-x86_64: Process 522 attached [pid 522] set_robust_list(0x55555671f660, 24) = 0 [pid 522] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 522] setpgid(0, 0 [pid 520] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 523 attached [pid 522] <... setpgid resumed>) = 0 [pid 520] <... munmap resumed>) = 0 [pid 523] set_robust_list(0x55555671f660, 24 [pid 520] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 523] <... set_robust_list resumed>) = 0 [pid 520] <... openat resumed>) = 4 [pid 523] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 520] ioctl(4, LOOP_SET_FD, 3 [pid 523] <... prctl resumed>) = 0 [pid 520] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 523] setpgid(0, 0 [pid 520] ioctl(4, LOOP_CLR_FD [pid 523] <... setpgid resumed>) = 0 [pid 520] <... ioctl resumed>) = 0 [pid 523] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 522] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 523] <... openat resumed>) = 3 [pid 523] write(3, "1000", 4) = 4 [pid 523] close(3) = 0 [pid 523] write(1, "executing program\n", 18executing program ) = 18 [pid 522] <... openat resumed>) = 3 [pid 523] memfd_create("syzkaller", 0) = 3 [pid 520] ioctl(4, LOOP_SET_FD, 3 [pid 523] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 520] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 523] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 520] close(4 [pid 522] write(3, "1000", 4) = 4 [pid 522] close(3) = 0 [pid 522] write(1, "executing program\n", 18executing program ) = 18 [pid 522] memfd_create("syzkaller", 0) = 3 [pid 522] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 519] chdir("./file0") = 0 [pid 519] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 519] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 523] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 520] <... close resumed>) = 0 [pid 520] close(3 [pid 519] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 519] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 520] <... close resumed>) = 0 [pid 520] chdir("./file0" [pid 521] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 519] <... mmap resumed>) = 0x20000000 [pid 520] <... chdir resumed>) = 0 [pid 520] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 520] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 520] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 519] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 520] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 519] <... openat resumed>) = 5 [pid 519] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 519] exit_group(0) = ? [pid 520] <... mmap resumed>) = 0x20000000 [pid 523] <... write resumed>) = 1048576 [pid 520] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 519] +++ exited with 0 +++ [pid 523] munmap(0x7f1ddd1fa000, 138412032 [pid 520] <... openat resumed>) = 5 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=519, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 520] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 520] exit_group(0 [pid 523] <... munmap resumed>) = 0 [pid 520] <... exit_group resumed>) = ? [pid 523] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 520] +++ exited with 0 +++ [pid 523] <... openat resumed>) = 4 [pid 523] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=520, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 523] ioctl(4, LOOP_CLR_FD [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 523] <... ioctl resumed>) = 0 [pid 523] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 523] close(4) = 0 [pid 523] close(3 [pid 522] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 523] <... close resumed>) = 0 [pid 523] chdir("./file0") = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 523] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 523] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 523] <... mount resumed>) = 0 [pid 523] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 523] <... open resumed>) = 4 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 523] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 299] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] close(3 [pid 299] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 523] <... mmap resumed>) = 0x20000000 [pid 523] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 525 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 524 [pid 523] <... openat resumed>) = 5 [pid 523] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 523] exit_group(0) = ? [pid 521] <... write resumed>) = 1048576 [pid 523] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=523, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 521] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 521] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 ./strace-static-x86_64: Process 524 attached [pid 521] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 521] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 525 attached [pid 522] <... write resumed>) = 1048576 [pid 525] set_robust_list(0x55555671f660, 24) = 0 [pid 525] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 521] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 521] close(4) = 0 [pid 521] close(3 [pid 524] set_robust_list(0x55555671f660, 24) = 0 [pid 524] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 executing program [pid 524] setpgid(0, 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 524] <... setpgid resumed>) = 0 [pid 524] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 524] <... openat resumed>) = 3 [pid 524] write(3, "1000", 4 [pid 295] <... openat resumed>) = 3 [pid 524] <... write resumed>) = 4 [pid 524] close(3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 524] <... close resumed>) = 0 [pid 524] write(1, "executing program\n", 18 [pid 295] <... ioctl resumed>) = 0 [pid 524] <... write resumed>) = 18 [pid 295] close(3 [pid 524] memfd_create("syzkaller", 0 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 524] <... memfd_create resumed>) = 3 [pid 524] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 526 [pid 524] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 521] <... close resumed>) = 0 [pid 525] <... prctl resumed>) = 0 [pid 525] setpgid(0, 0) = 0 [pid 525] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 522] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 525] <... openat resumed>) = 3 [pid 522] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 522] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 522] ioctl(4, LOOP_CLR_FD) = 0 [pid 525] write(3, "1000", 4 [pid 524] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 525] <... write resumed>) = 4 [pid 525] close(3) = 0 [pid 525] write(1, "executing program\n", 18executing program ) = 18 [pid 525] memfd_create("syzkaller", 0 [pid 522] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 522] close(4) = 0 ./strace-static-x86_64: Process 526 attached [pid 522] close(3 [pid 525] <... memfd_create resumed>) = 3 [pid 525] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 521] chdir("./file0") = 0 [pid 521] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 524] <... write resumed>) = 1048576 [pid 521] <... open resumed>) = 3 [pid 526] set_robust_list(0x55555671f660, 24) = 0 [pid 526] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 526] setpgid(0, 0) = 0 [pid 526] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 521] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 526] <... openat resumed>) = 3 [pid 521] <... mount resumed>) = 0 [pid 521] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 521] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 522] <... close resumed>) = 0 [pid 526] write(3, "1000", 4 [pid 524] munmap(0x7f1ddd1fa000, 138412032 [pid 526] <... write resumed>) = 4 [pid 526] close(3) = 0 [pid 526] write(1, "executing program\n", 18) = 18 executing program [pid 526] memfd_create("syzkaller", 0) = 3 [pid 526] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 524] <... munmap resumed>) = 0 [pid 521] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 521] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 521] exit_group(0) = ? [pid 522] chdir("./file0") = 0 [pid 522] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 522] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 522] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 522] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 524] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 521] +++ exited with 0 +++ [pid 524] <... openat resumed>) = 4 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=521, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 524] ioctl(4, LOOP_SET_FD, 3 [pid 526] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 524] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 296] <... restart_syscall resumed>) = 0 [pid 524] ioctl(4, LOOP_CLR_FD) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 522] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 522] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 522] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 296] close(3 [pid 522] exit_group(0 [pid 296] <... close resumed>) = 0 [pid 522] <... exit_group resumed>) = ? [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 524] ioctl(4, LOOP_SET_FD, 3 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 527 [pid 524] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 524] close(4) = 0 [pid 524] close(3 [pid 522] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=522, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 525] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 524] <... close resumed>) = 0 ./strace-static-x86_64: Process 527 attached [pid 527] set_robust_list(0x55555671f660, 24) = 0 [pid 527] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 527] setpgid(0, 0) = 0 [pid 527] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 524] chdir("./file0" [pid 526] <... write resumed>) = 1048576 [pid 525] <... write resumed>) = 1048576 [pid 524] <... chdir resumed>) = 0 [pid 527] <... openat resumed>) = 3 [pid 524] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 527] write(3, "1000", 4) = 4 [pid 527] close(3executing program ) = 0 [pid 527] write(1, "executing program\n", 18) = 18 [pid 527] memfd_create("syzkaller", 0) = 3 [pid 527] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] <... restart_syscall resumed>) = 0 [pid 524] <... open resumed>) = 3 [pid 524] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 524] <... mount resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 524] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 528 [pid 524] <... open resumed>) = 4 [pid 524] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 526] munmap(0x7f1ddd1fa000, 138412032 [pid 524] <... mmap resumed>) = 0x20000000 [pid 524] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 524] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 524] exit_group(0) = ? [pid 524] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=524, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 526] <... munmap resumed>) = 0 ./strace-static-x86_64: Process 528 attached [pid 528] set_robust_list(0x55555671f660, 24) = 0 [pid 528] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 528] setpgid(0, 0) = 0 executing program [pid 528] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 528] write(3, "1000", 4) = 4 [pid 528] close(3) = 0 [pid 528] write(1, "executing program\n", 18) = 18 [pid 528] memfd_create("syzkaller", 0) = 3 [pid 525] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 528] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 525] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 525] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 529 [pid 525] ioctl(4, LOOP_CLR_FD./strace-static-x86_64: Process 529 attached [pid 528] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 527] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 526] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 525] <... ioctl resumed>) = 0 [pid 529] set_robust_list(0x55555671f660, 24 [pid 526] <... openat resumed>) = 4 [pid 529] <... set_robust_list resumed>) = 0 [pid 529] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 526] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 529] <... prctl resumed>) = 0 [pid 525] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 525] close(4) = 0 [pid 525] close(3 [pid 529] setpgid(0, 0 [pid 526] ioctl(4, LOOP_CLR_FD [pid 525] <... close resumed>) = 0 [pid 525] chdir("./file0") = 0 [pid 525] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 529] <... setpgid resumed>) = 0 [pid 526] <... ioctl resumed>) = 0 [pid 525] <... open resumed>) = 3 [pid 525] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 529] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 525] <... mount resumed>) = 0 [pid 525] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 525] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 529] <... openat resumed>) = 3 [pid 529] write(3, "1000", 4) = 4 [pid 529] close(3 [pid 526] ioctl(4, LOOP_SET_FD, 3 [pid 529] <... close resumed>) = 0 [pid 526] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 529] write(1, "executing program\n", 18 [pid 525] <... mmap resumed>) = 0x20000000 executing program [pid 526] close(4 [pid 529] <... write resumed>) = 18 [pid 525] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 525] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 526] <... close resumed>) = 0 [pid 529] memfd_create("syzkaller", 0 [pid 526] close(3 [pid 525] exit_group(0) = ? [pid 525] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=525, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 526] <... close resumed>) = 0 [pid 529] <... memfd_create resumed>) = 3 [pid 299] <... restart_syscall resumed>) = 0 [pid 529] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 526] chdir("./file0" [pid 529] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 526] <... chdir resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 530 [pid 528] <... write resumed>) = 1048576 [pid 527] <... write resumed>) = 1048576 [pid 527] munmap(0x7f1ddd1fa000, 138412032 [pid 529] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 526] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 527] <... munmap resumed>) = 0 [pid 527] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 526] <... open resumed>) = 3 [pid 527] <... openat resumed>) = 4 [pid 527] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 527] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 530 attached [pid 530] set_robust_list(0x55555671f660, 24) = 0 [pid 526] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 530] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 530] setpgid(0, 0) = 0 [pid 526] <... mount resumed>) = 0 [pid 530] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 526] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 530] <... openat resumed>) = 3 [pid 530] write(3, "1000", 4 [pid 527] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 527] close(4) = 0 [pid 527] close(3 [pid 526] <... open resumed>) = 4 [pid 526] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 526] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 530] <... write resumed>) = 4 [pid 526] <... openat resumed>) = 5 [pid 530] close(3) = 0 executing program [pid 526] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 530] write(1, "executing program\n", 18) = 18 [pid 526] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 526] exit_group(0) = ? [pid 530] memfd_create("syzkaller", 0) = 3 [pid 530] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 526] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=526, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 527] <... close resumed>) = 0 [pid 528] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 528] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 528] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 528] ioctl(4, LOOP_CLR_FD) = 0 [pid 529] <... write resumed>) = 1048576 [pid 528] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 528] close(4) = 0 [pid 528] close(3 [pid 527] chdir("./file0") = 0 [pid 527] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 528] <... close resumed>) = 0 [pid 527] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 527] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 527] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 527] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 527] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 527] exit_group(0) = ? [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 531 ./strace-static-x86_64: Process 531 attached [pid 529] munmap(0x7f1ddd1fa000, 138412032 [pid 531] set_robust_list(0x55555671f660, 24) = 0 [pid 531] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 528] chdir("./file0") = 0 [pid 528] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 531] setpgid(0, 0 [pid 528] <... open resumed>) = 3 [pid 527] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=527, si_uid=0, si_status=0, si_utime=1, si_stime=1} --- [pid 531] <... setpgid resumed>) = 0 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 528] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 528] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 528] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 531] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 531] write(3, "1000", 4) = 4 [pid 529] <... munmap resumed>) = 0 [pid 531] close(3 [pid 529] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 528] <... mmap resumed>) = 0x20000000 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 532 [pid 531] <... close resumed>) = 0 [pid 528] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 531] write(1, "executing program\n", 18 [pid 528] <... openat resumed>) = 5 [pid 529] <... openat resumed>) = 4 executing program [pid 531] <... write resumed>) = 18 [pid 528] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 528] exit_group(0) = ? [pid 531] memfd_create("syzkaller", 0 [pid 529] ioctl(4, LOOP_SET_FD, 3 [pid 531] <... memfd_create resumed>) = 3 [pid 531] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 529] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 531] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 529] ioctl(4, LOOP_CLR_FD [pid 530] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 528] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=528, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 532 attached [pid 530] <... write resumed>) = 1048576 [pid 532] set_robust_list(0x55555671f660, 24) = 0 [pid 531] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 532] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 532] setpgid(0, 0) = 0 executing program [pid 529] <... ioctl resumed>) = 0 [pid 532] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 532] write(3, "1000", 4) = 4 [pid 532] close(3) = 0 [pid 532] write(1, "executing program\n", 18) = 18 [pid 532] memfd_create("syzkaller", 0) = 3 [pid 532] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 530] munmap(0x7f1ddd1fa000, 138412032 [pid 529] ioctl(4, LOOP_SET_FD, 3 [pid 532] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 529] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 529] close(4 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3 [pid 530] <... munmap resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 529] <... close resumed>) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 533 [pid 530] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 530] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 530] ioctl(4, LOOP_CLR_FD) = 0 [pid 529] close(3 [pid 530] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 530] close(4) = 0 [pid 530] close(3) = 0 [pid 529] <... close resumed>) = 0 [pid 530] chdir("./file0") = 0 [pid 530] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 529] chdir("./file0" [pid 530] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 530] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 530] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 529] <... chdir resumed>) = 0 [pid 529] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 529] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 530] <... mmap resumed>) = 0x20000000 [pid 530] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 530] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 530] exit_group(0) = ? [pid 529] <... mount resumed>) = 0 [pid 529] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 529] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 529] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 529] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 530] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=530, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 529] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 529] exit_group(0) = ? [pid 529] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=529, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 531] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 533 attached [pid 532] <... write resumed>) = 1048576 [pid 533] set_robust_list(0x55555671f660, 24 [pid 532] munmap(0x7f1ddd1fa000, 138412032 [pid 533] <... set_robust_list resumed>) = 0 [pid 532] <... munmap resumed>) = 0 [pid 531] munmap(0x7f1ddd1fa000, 138412032 [pid 532] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 531] <... munmap resumed>) = 0 [pid 532] <... openat resumed>) = 4 [pid 532] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 532] ioctl(4, LOOP_CLR_FD) = 0 [pid 531] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 531] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 531] ioctl(4, LOOP_CLR_FD [pid 533] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 531] <... ioctl resumed>) = 0 [pid 533] <... prctl resumed>) = 0 [pid 533] setpgid(0, 0) = 0 [pid 533] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 533] write(3, "1000", 4) = 4 [pid 533] close(3 [pid 532] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 531] ioctl(4, LOOP_SET_FD, 3 [pid 532] close(4 [pid 531] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 532] <... close resumed>) = 0 [pid 531] close(4 [pid 532] close(3 [pid 531] <... close resumed>) = 0 [pid 533] <... close resumed>) = 0 executing program [pid 533] write(1, "executing program\n", 18) = 18 [pid 533] memfd_create("syzkaller", 0) = 3 [pid 533] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 531] close(3 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] <... openat resumed>) = 3 [pid 299] <... ioctl resumed>) = 0 [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] close(3 [pid 297] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 297] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... close resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 534 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 535 [pid 531] <... close resumed>) = 0 ./strace-static-x86_64: Process 534 attached [pid 532] <... close resumed>) = 0 [pid 534] set_robust_list(0x55555671f660, 24) = 0 [pid 534] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 534] setpgid(0, 0) = 0 [pid 534] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 532] chdir("./file0" [pid 531] chdir("./file0"./strace-static-x86_64: Process 535 attached [pid 532] <... chdir resumed>) = 0 [pid 531] <... chdir resumed>) = 0 [pid 532] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 535] set_robust_list(0x55555671f660, 24 [pid 531] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 534] write(3, "1000", 4 [pid 532] <... open resumed>) = 3 [pid 535] <... set_robust_list resumed>) = 0 [pid 532] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 531] <... open resumed>) = 3 [pid 532] <... mount resumed>) = 0 [pid 531] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 535] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 532] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 531] <... mount resumed>) = 0 [pid 532] <... open resumed>) = 4 [pid 531] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 535] setpgid(0, 0 [pid 532] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 531] <... open resumed>) = 4 [pid 534] <... write resumed>) = 4 [pid 534] close(3) = 0 [pid 534] write(1, "executing program\n", 18 [pid 532] <... mmap resumed>) = 0x20000000 [pid 535] <... setpgid resumed>) = 0 [pid 531] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 532] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000executing program [pid 534] <... write resumed>) = 18 [pid 534] memfd_create("syzkaller", 0 [pid 531] <... mmap resumed>) = 0x20000000 [pid 532] <... openat resumed>) = 5 [pid 531] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 535] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 531] <... openat resumed>) = 5 [pid 532] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 535] <... openat resumed>) = 3 [pid 532] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 531] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 532] exit_group(0 [pid 535] write(3, "1000", 4 [pid 531] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 535] <... write resumed>) = 4 [pid 532] <... exit_group resumed>) = ? [pid 531] exit_group(0) = ? [pid 534] <... memfd_create resumed>) = 3 [pid 534] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 531] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=531, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 535] close(3 [pid 532] +++ exited with 0 +++ [pid 535] <... close resumed>) = 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=532, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>executing program [pid 535] write(1, "executing program\n", 18) = 18 [pid 535] memfd_create("syzkaller", 0) = 3 [pid 533] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 535] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 536 [pid 534] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 535] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 537 [pid 533] <... write resumed>) = 1048576 [pid 533] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 533] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 533] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 533] ioctl(4, LOOP_CLR_FD) = 0 [pid 534] <... write resumed>) = 1048576 [pid 534] munmap(0x7f1ddd1fa000, 138412032 [pid 533] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 533] close(4) = 0 [pid 533] close(3) = 0 ./strace-static-x86_64: Process 537 attached ./strace-static-x86_64: Process 536 attached [pid 535] <... write resumed>) = 1048576 [pid 537] set_robust_list(0x55555671f660, 24 [pid 536] set_robust_list(0x55555671f660, 24 [pid 535] munmap(0x7f1ddd1fa000, 138412032 [pid 537] <... set_robust_list resumed>) = 0 [pid 536] <... set_robust_list resumed>) = 0 [pid 533] chdir("./file0" [pid 535] <... munmap resumed>) = 0 [pid 537] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 536] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 535] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 537] <... prctl resumed>) = 0 [pid 536] <... prctl resumed>) = 0 [pid 535] <... openat resumed>) = 4 [pid 537] setpgid(0, 0) = 0 [pid 536] setpgid(0, 0 [pid 535] ioctl(4, LOOP_SET_FD, 3 [pid 537] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 536] <... setpgid resumed>) = 0 [pid 535] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 537] <... openat resumed>) = 3 executing program [pid 537] write(3, "1000", 4 [pid 536] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 535] ioctl(4, LOOP_CLR_FD [pid 537] <... write resumed>) = 4 [pid 536] <... openat resumed>) = 3 [pid 537] close(3 [pid 536] write(3, "1000", 4 [pid 535] <... ioctl resumed>) = 0 [pid 537] <... close resumed>) = 0 [pid 536] <... write resumed>) = 4 [pid 537] write(1, "executing program\n", 18 [pid 536] close(3 [pid 537] <... write resumed>) = 18 [pid 536] <... close resumed>) = 0 [pid 537] memfd_create("syzkaller", 0 [pid 536] write(1, "executing program\n", 18executing program [pid 537] <... memfd_create resumed>) = 3 [pid 536] <... write resumed>) = 18 [pid 537] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 536] memfd_create("syzkaller", 0 [pid 537] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 536] <... memfd_create resumed>) = 3 [pid 533] <... chdir resumed>) = 0 [pid 533] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 534] <... munmap resumed>) = 0 [pid 533] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 534] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 534] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 533] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 536] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 535] ioctl(4, LOOP_SET_FD, 3 [pid 536] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 535] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 534] ioctl(4, LOOP_CLR_FD [pid 533] <... open resumed>) = 4 [pid 534] <... ioctl resumed>) = 0 [pid 533] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 534] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 534] close(4) = 0 [pid 534] close(3 [pid 536] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 535] close(4) = 0 [pid 535] close(3 [pid 533] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 533] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 533] exit_group(0) = ? [pid 533] +++ exited with 0 +++ [pid 535] <... close resumed>) = 0 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=533, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 534] <... close resumed>) = 0 [pid 534] chdir("./file0") = 0 [pid 534] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 534] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 534] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 298] <... restart_syscall resumed>) = 0 [pid 537] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 535] chdir("./file0") = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 535] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3 [pid 535] <... open resumed>) = 3 [pid 298] <... close resumed>) = 0 [pid 535] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 535] <... mount resumed>) = 0 [pid 535] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 538 [pid 535] <... open resumed>) = 4 [pid 535] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 534] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 535] <... mmap resumed>) = 0x20000000 [pid 535] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 535] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 535] exit_group(0) = ? [pid 534] <... mmap resumed>) = 0x20000000 [pid 535] +++ exited with 0 +++ [pid 534] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=535, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 534] <... openat resumed>) = 5 [pid 534] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 534] exit_group(0) = ? [pid 534] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=534, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 537] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 538 attached [pid 538] set_robust_list(0x55555671f660, 24) = 0 [pid 538] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 538] setpgid(0, 0) = 0 [pid 538] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 538] write(3, "1000", 4) = 4 [pid 538] close(3) = 0 [pid 538] write(1, "executing program\n", 18 [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] close(3 [pid 299] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 539 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 540 executing program [pid 538] <... write resumed>) = 18 [pid 538] memfd_create("syzkaller", 0) = 3 [pid 538] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 539 attached [pid 539] set_robust_list(0x55555671f660, 24) = 0 [pid 539] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 539] setpgid(0, 0) = 0 [pid 539] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 537] munmap(0x7f1ddd1fa000, 138412032 [pid 536] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 540 attached [pid 537] <... munmap resumed>) = 0 [pid 536] munmap(0x7f1ddd1fa000, 138412032 [pid 540] set_robust_list(0x55555671f660, 24 [pid 537] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 536] <... munmap resumed>) = 0 [pid 537] <... openat resumed>) = 4 [pid 540] <... set_robust_list resumed>) = 0 [pid 537] ioctl(4, LOOP_SET_FD, 3 [pid 536] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 540] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 537] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 540] <... prctl resumed>) = 0 [pid 537] ioctl(4, LOOP_CLR_FD [pid 536] <... openat resumed>) = 4 [pid 540] setpgid(0, 0 [pid 537] <... ioctl resumed>) = 0 [pid 540] <... setpgid resumed>) = 0 [pid 536] ioctl(4, LOOP_SET_FD, 3executing program [pid 540] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 536] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 540] <... openat resumed>) = 3 [pid 536] ioctl(4, LOOP_CLR_FD [pid 540] write(3, "1000", 4 [pid 536] <... ioctl resumed>) = 0 [pid 540] <... write resumed>) = 4 [pid 540] close(3) = 0 [pid 540] write(1, "executing program\n", 18) = 18 [pid 540] memfd_create("syzkaller", 0) = 3 [pid 540] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 537] ioctl(4, LOOP_SET_FD, 3 [pid 540] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 537] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 539] <... openat resumed>) = 3 [pid 539] write(3, "1000", 4) = 4 [pid 539] close(3) = 0 [pid 539] write(1, "executing program\n", 18executing program ) = 18 [pid 539] memfd_create("syzkaller", 0) = 3 [pid 539] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 537] close(4) = 0 [pid 536] ioctl(4, LOOP_SET_FD, 3 [pid 537] close(3 [pid 536] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 538] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 537] <... close resumed>) = 0 [pid 536] close(4 [pid 537] chdir("./file0" [pid 536] <... close resumed>) = 0 [pid 537] <... chdir resumed>) = 0 [pid 536] close(3 [pid 537] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 536] <... close resumed>) = 0 [pid 537] <... open resumed>) = 3 [pid 536] chdir("./file0" [pid 537] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 536] <... chdir resumed>) = 0 [pid 537] <... mount resumed>) = 0 [pid 536] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 537] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 536] <... open resumed>) = 3 [pid 537] <... open resumed>) = 4 [pid 536] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 537] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 536] <... mount resumed>) = 0 [pid 537] <... mmap resumed>) = 0x20000000 [pid 536] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 537] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 536] <... open resumed>) = 4 [pid 537] <... openat resumed>) = 5 [pid 536] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 540] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 537] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 536] <... mmap resumed>) = 0x20000000 [pid 537] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 536] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 537] exit_group(0 [pid 536] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 537] <... exit_group resumed>) = ? [pid 536] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 537] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=537, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 536] exit_group(0) = ? [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 536] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=536, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 539] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 538] <... write resumed>) = 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 542 [pid 538] munmap(0x7f1ddd1fa000, 138412032 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 540] <... write resumed>) = 1048576 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 543 [pid 538] <... munmap resumed>) = 0 [pid 538] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 538] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 538] ioctl(4, LOOP_CLR_FD) = 0 [pid 539] <... write resumed>) = 1048576 [pid 538] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 538] close(4) = 0 [pid 538] close(3./strace-static-x86_64: Process 543 attached [pid 540] munmap(0x7f1ddd1fa000, 138412032 [pid 543] set_robust_list(0x55555671f660, 24 [pid 540] <... munmap resumed>) = 0 [pid 543] <... set_robust_list resumed>) = 0 [pid 540] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 543] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 540] <... openat resumed>) = 4 [pid 543] <... prctl resumed>) = 0 [pid 540] ioctl(4, LOOP_SET_FD, 3 [pid 543] setpgid(0, 0 [pid 540] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 543] <... setpgid resumed>) = 0 [pid 540] ioctl(4, LOOP_CLR_FDexecuting program [pid 543] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 540] <... ioctl resumed>) = 0 [pid 543] <... openat resumed>) = 3 [pid 543] write(3, "1000", 4) = 4 [pid 543] close(3) = 0 [pid 543] write(1, "executing program\n", 18) = 18 [pid 543] memfd_create("syzkaller", 0) = 3 [pid 543] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 540] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 542 attached [pid 542] set_robust_list(0x55555671f660, 24 [pid 538] <... close resumed>) = 0 [pid 542] <... set_robust_list resumed>) = 0 [pid 542] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 542] setpgid(0, 0) = 0 [pid 538] chdir("./file0" [pid 542] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 538] <... chdir resumed>) = 0 [pid 538] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 542] <... openat resumed>) = 3 [pid 539] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 542] write(3, "1000", 4) = 4 [pid 538] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 542] close(3) = 0 [pid 542] write(1, "executing program\n", 18executing program [pid 543] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 542] <... write resumed>) = 18 [pid 540] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 540] close(4) = 0 [pid 540] close(3 [pid 542] memfd_create("syzkaller", 0 [pid 539] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 538] <... mount resumed>) = 0 [pid 539] <... openat resumed>) = 4 [pid 542] <... memfd_create resumed>) = 3 [pid 539] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 539] ioctl(4, LOOP_CLR_FD) = 0 [pid 542] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 540] <... close resumed>) = 0 [pid 540] chdir("./file0") = 0 [pid 540] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 542] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 540] <... open resumed>) = 3 [pid 538] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 540] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 540] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 540] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 538] <... open resumed>) = 4 [pid 540] <... mmap resumed>) = 0x20000000 [pid 540] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 540] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 540] exit_group(0) = ? [pid 538] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 540] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=540, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 544 [pid 539] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 539] close(4) = 0 [pid 539] close(3 [pid 538] <... mmap resumed>) = 0x20000000 [pid 538] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 543] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 544 attached [pid 543] munmap(0x7f1ddd1fa000, 138412032 [pid 544] set_robust_list(0x55555671f660, 24 [pid 538] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 544] <... set_robust_list resumed>) = 0 [pid 543] <... munmap resumed>) = 0 [pid 544] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 543] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 544] <... prctl resumed>) = 0 [pid 544] setpgid(0, 0 [pid 543] <... openat resumed>) = 4 [pid 544] <... setpgid resumed>) = 0 [pid 543] ioctl(4, LOOP_SET_FD, 3 [pid 544] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 538] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 543] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 544] <... openat resumed>) = 3 [pid 543] ioctl(4, LOOP_CLR_FD [pid 544] write(3, "1000", 4 [pid 543] <... ioctl resumed>) = 0 [pid 544] <... write resumed>) = 4 [pid 544] close(3executing program ) = 0 [pid 544] write(1, "executing program\n", 18 [pid 538] exit_group(0 [pid 544] <... write resumed>) = 18 [pid 538] <... exit_group resumed>) = ? [pid 544] memfd_create("syzkaller", 0 [pid 538] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=538, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 544] <... memfd_create resumed>) = 3 [pid 543] ioctl(4, LOOP_SET_FD, 3 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 544] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 543] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 544] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 543] close(4 [pid 539] <... close resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 545 [pid 543] <... close resumed>) = 0 [pid 543] close(3 [pid 539] chdir("./file0") = 0 [pid 539] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 539] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 539] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 539] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 543] <... close resumed>) = 0 [pid 539] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 545 attached [pid 545] set_robust_list(0x55555671f660, 24) = 0 [pid 545] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 545] setpgid(0, 0) = 0 [pid 545] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 539] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 545] <... openat resumed>) = 3 [pid 539] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 539] exit_group(0 [pid 545] write(3, "1000", 4executing program ) = 4 [pid 539] <... exit_group resumed>) = ? [pid 545] close(3) = 0 [pid 543] chdir("./file0" [pid 539] +++ exited with 0 +++ [pid 543] <... chdir resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=539, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 543] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 545] write(1, "executing program\n", 18) = 18 [pid 545] memfd_create("syzkaller", 0 [pid 543] <... open resumed>) = 3 [pid 543] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 545] <... memfd_create resumed>) = 3 [pid 543] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 545] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 543] <... open resumed>) = 4 [pid 544] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 543] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 544] <... write resumed>) = 1048576 [pid 543] <... mmap resumed>) = 0x20000000 [pid 542] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 299] <... restart_syscall resumed>) = 0 [pid 544] munmap(0x7f1ddd1fa000, 138412032 [pid 543] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 546 ./strace-static-x86_64: Process 546 attached [pid 546] set_robust_list(0x55555671f660, 24 [pid 543] <... openat resumed>) = 5 [pid 543] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 543] exit_group(0) = ? [pid 546] <... set_robust_list resumed>) = 0 [pid 546] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 546] setpgid(0, 0 [pid 543] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=543, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 542] <... write resumed>) = 1048576 [pid 544] <... munmap resumed>) = 0 [pid 542] munmap(0x7f1ddd1fa000, 138412032 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 547 executing program [pid 546] <... setpgid resumed>) = 0 [pid 546] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 546] write(3, "1000", 4) = 4 [pid 546] close(3) = 0 [pid 546] write(1, "executing program\n", 18) = 18 [pid 546] memfd_create("syzkaller", 0) = 3 [pid 546] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 545] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 544] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 542] <... munmap resumed>) = 0 [pid 544] <... openat resumed>) = 4 [pid 542] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 544] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 547 attached [pid 542] <... openat resumed>) = 4 [pid 544] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 547] set_robust_list(0x55555671f660, 24 [pid 542] ioctl(4, LOOP_SET_FD, 3 [pid 544] ioctl(4, LOOP_CLR_FD [pid 547] <... set_robust_list resumed>) = 0 [pid 542] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 544] <... ioctl resumed>) = 0 [pid 542] ioctl(4, LOOP_CLR_FD) = 0 [pid 547] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 547] setpgid(0, 0) = 0 [pid 547] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program ) = 3 [pid 544] ioctl(4, LOOP_SET_FD, 3 [pid 547] write(3, "1000", 4 [pid 544] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 547] <... write resumed>) = 4 [pid 544] close(4 [pid 547] close(3 [pid 542] ioctl(4, LOOP_SET_FD, 3 [pid 547] <... close resumed>) = 0 [pid 544] <... close resumed>) = 0 [pid 542] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 547] write(1, "executing program\n", 18 [pid 544] close(3 [pid 542] close(4 [pid 547] <... write resumed>) = 18 [pid 544] <... close resumed>) = 0 [pid 542] <... close resumed>) = 0 [pid 547] memfd_create("syzkaller", 0 [pid 544] chdir("./file0" [pid 542] close(3 [pid 547] <... memfd_create resumed>) = 3 [pid 542] <... close resumed>) = 0 [pid 547] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 544] <... chdir resumed>) = 0 [pid 542] chdir("./file0" [pid 547] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 544] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 542] <... chdir resumed>) = 0 [pid 546] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 544] <... open resumed>) = 3 [pid 542] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 544] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 542] <... open resumed>) = 3 [pid 544] <... mount resumed>) = 0 [pid 542] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 544] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 542] <... mount resumed>) = 0 [pid 544] <... open resumed>) = 4 [pid 542] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 544] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 542] <... open resumed>) = 4 [pid 544] <... mmap resumed>) = 0x20000000 [pid 542] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 545] <... write resumed>) = 1048576 [pid 545] munmap(0x7f1ddd1fa000, 138412032 [pid 542] <... mmap resumed>) = 0x20000000 [pid 544] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 545] <... munmap resumed>) = 0 [pid 545] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 545] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 547] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 542] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 544] <... openat resumed>) = 5 [pid 542] <... openat resumed>) = 5 [pid 544] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 542] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 544] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 542] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 544] exit_group(0 [pid 542] exit_group(0 [pid 544] <... exit_group resumed>) = ? [pid 542] <... exit_group resumed>) = ? [pid 545] ioctl(4, LOOP_CLR_FD) = 0 [pid 546] <... write resumed>) = 1048576 [pid 544] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=544, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 546] munmap(0x7f1ddd1fa000, 138412032 [pid 545] ioctl(4, LOOP_SET_FD, 3 [pid 542] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=542, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 545] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 545] close(4) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 295] close(3 [pid 297] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 549 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 548 [pid 545] close(3) = 0 [pid 545] chdir("./file0") = 0 [pid 545] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 545] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 545] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 546] <... munmap resumed>) = 0 [pid 545] <... open resumed>) = 4 [pid 545] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 546] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 546] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 546] ioctl(4, LOOP_CLR_FD) = 0 [pid 545] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 545] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 545] exit_group(0 [pid 546] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 546] close(4) = 0 ./strace-static-x86_64: Process 548 attached [pid 547] <... write resumed>) = 1048576 [pid 548] set_robust_list(0x55555671f660, 24 [pid 547] munmap(0x7f1ddd1fa000, 138412032 [pid 548] <... set_robust_list resumed>) = 0 [pid 547] <... munmap resumed>) = 0 [pid 548] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 547] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 548] <... prctl resumed>) = 0 [pid 548] setpgid(0, 0 [pid 547] <... openat resumed>) = 4 [pid 548] <... setpgid resumed>) = 0 [pid 547] ioctl(4, LOOP_SET_FD, 3 [pid 548] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 547] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 548] <... openat resumed>) = 3 [pid 547] ioctl(4, LOOP_CLR_FD [pid 548] write(3, "1000", 4 [pid 547] <... ioctl resumed>) = 0 [pid 548] <... write resumed>) = 4 [pid 548] close(3) = 0 executing program [pid 548] write(1, "executing program\n", 18) = 18 [pid 548] memfd_create("syzkaller", 0 [pid 546] close(3 [pid 548] <... memfd_create resumed>) = 3 [pid 548] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 547] ioctl(4, LOOP_SET_FD, 3 [pid 546] <... close resumed>) = 0 [pid 545] <... exit_group resumed>) = ? [pid 547] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 547] close(4) = 0 [pid 547] close(3 [pid 545] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=545, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 550 ./strace-static-x86_64: Process 549 attached [pid 547] <... close resumed>) = 0 [pid 549] set_robust_list(0x55555671f660, 24) = 0 [pid 549] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 549] setpgid(0, 0) = 0 [pid 549] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 548] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 547] chdir("./file0") = 0 [pid 547] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 549] write(3, "1000", 4 [pid 547] <... open resumed>) = 3 [pid 547] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 549] <... write resumed>) = 4 [pid 547] <... mount resumed>) = 0 [pid 547] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 547] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 546] chdir("./file0") = 0 [pid 549] close(3) = 0 [pid 547] <... mmap resumed>) = 0x20000000 [pid 546] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 549] write(1, "executing program\n", 18executing program ) = 18 [pid 549] memfd_create("syzkaller", 0) = 3 [pid 549] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 546] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 547] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 546] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 546] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 546] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 546] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 546] exit_group(0) = ? [pid 546] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=546, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 547] <... openat resumed>) = 5 ./strace-static-x86_64: Process 550 attached [pid 547] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 550] set_robust_list(0x55555671f660, 24 [pid 547] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 550] <... set_robust_list resumed>) = 0 [pid 548] <... write resumed>) = 1048576 [pid 550] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 548] munmap(0x7f1ddd1fa000, 138412032 [pid 547] exit_group(0 [pid 550] <... prctl resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 548] <... munmap resumed>) = 0 [pid 547] <... exit_group resumed>) = ? [pid 550] setpgid(0, 0 [pid 548] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 550] <... setpgid resumed>) = 0 [pid 547] +++ exited with 0 +++ [pid 548] <... openat resumed>) = 4 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 551 [pid 550] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 548] ioctl(4, LOOP_SET_FD, 3 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=547, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>executing program [pid 550] <... openat resumed>) = 3 [pid 548] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 550] write(3, "1000", 4 [pid 548] ioctl(4, LOOP_CLR_FD [pid 550] <... write resumed>) = 4 [pid 548] <... ioctl resumed>) = 0 [pid 550] close(3) = 0 [pid 550] write(1, "executing program\n", 18) = 18 [pid 550] memfd_create("syzkaller", 0) = 3 [pid 550] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 549] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 552 [pid 550] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 548] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 548] close(4) = 0 [pid 548] close(3./strace-static-x86_64: Process 551 attached [pid 551] set_robust_list(0x55555671f660, 24) = 0 [pid 551] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 551] setpgid(0, 0) = 0 [pid 551] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 551] write(3, "1000", 4 [pid 548] <... close resumed>) = 0 [pid 548] chdir("./file0") = 0 [pid 548] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 548] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 551] <... write resumed>) = 4 [pid 548] <... mount resumed>) = 0 [pid 548] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 548] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 551] close(3) = 0 [pid 548] <... mmap resumed>) = 0x20000000 [pid 548] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 548] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 548] exit_group(0) = ? [pid 551] write(1, "executing program\n", 18executing program ) = 18 [pid 551] memfd_create("syzkaller", 0 [pid 548] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=548, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 551] <... memfd_create resumed>) = 3 [pid 551] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 549] <... write resumed>) = 1048576 [pid 549] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 552 attached [pid 552] set_robust_list(0x55555671f660, 24 [pid 550] <... write resumed>) = 1048576 [pid 552] <... set_robust_list resumed>) = 0 [pid 552] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 549] <... munmap resumed>) = 0 [pid 552] <... prctl resumed>) = 0 [pid 552] setpgid(0, 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 553 [pid 552] <... setpgid resumed>) = 0 [pid 552] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 549] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 549] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 549] ioctl(4, LOOP_CLR_FD) = 0 [pid 552] <... openat resumed>) = 3 [pid 552] write(3, "1000", 4) = 4 [pid 552] close(3) = 0 [pid 549] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 549] close(4 [pid 550] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 553 attached ) = 0 [pid 553] set_robust_list(0x55555671f660, 24 [pid 550] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 553] <... set_robust_list resumed>) = 0 [pid 550] <... openat resumed>) = 4 [pid 553] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 550] ioctl(4, LOOP_SET_FD, 3 [pid 553] <... prctl resumed>) = 0 [pid 550] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 553] setpgid(0, 0 [pid 550] ioctl(4, LOOP_CLR_FD [pid 553] <... setpgid resumed>) = 0 [pid 550] <... ioctl resumed>) = 0 [pid 553] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 553] write(3, "1000", 4) = 4 [pid 553] close(3) = 0 executing program [pid 553] write(1, "executing program\n", 18) = 18 [pid 553] memfd_create("syzkaller", 0 [pid 550] ioctl(4, LOOP_SET_FD, 3 [pid 553] <... memfd_create resumed>) = 3 [pid 550] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 553] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 550] close(4) = 0 [pid 553] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 550] close(3 [pid 549] <... close resumed>) = 0 [pid 549] close(3 [pid 552] write(1, "executing program\n", 18executing program ) = 18 [pid 552] memfd_create("syzkaller", 0 [pid 550] <... close resumed>) = 0 [pid 552] <... memfd_create resumed>) = 3 [pid 552] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 550] chdir("./file0") = 0 [pid 550] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 550] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 550] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 550] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 550] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 550] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 550] exit_group(0) = ? [pid 549] <... close resumed>) = 0 [pid 549] chdir("./file0" [pid 550] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=550, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 549] <... chdir resumed>) = 0 [pid 549] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 549] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 553] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 549] <... mount resumed>) = 0 [pid 549] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 549] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 549] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 549] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 549] exit_group(0) = ? [pid 549] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=549, si_uid=0, si_status=0, si_utime=1, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 551] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 552] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 553] <... write resumed>) = 1048576 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 554 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 555 [pid 551] <... write resumed>) = 1048576 [pid 553] munmap(0x7f1ddd1fa000, 138412032 [pid 551] munmap(0x7f1ddd1fa000, 138412032 [pid 553] <... munmap resumed>) = 0 ./strace-static-x86_64: Process 554 attached [pid 553] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 551] <... munmap resumed>) = 0 [pid 554] set_robust_list(0x55555671f660, 24) = 0 [pid 554] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 554] setpgid(0, 0) = 0 [pid 554] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 552] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 555 attached [pid 554] <... openat resumed>) = 3 [pid 555] set_robust_list(0x55555671f660, 24) = 0 [pid 555] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 554] write(3, "1000", 4) = 4 [pid 554] close(3) = 0 [pid 555] <... prctl resumed>) = 0 [pid 555] setpgid(0, 0 [pid 554] write(1, "executing program\n", 18executing program ) = 18 [pid 555] <... setpgid resumed>) = 0 [pid 554] memfd_create("syzkaller", 0 [pid 555] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 554] <... memfd_create resumed>) = 3 [pid 555] <... openat resumed>) = 3 [pid 554] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 552] munmap(0x7f1ddd1fa000, 138412032 [pid 554] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 552] <... munmap resumed>) = 0 [pid 553] <... openat resumed>) = 4 [pid 551] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 553] ioctl(4, LOOP_SET_FD, 3 [pid 551] <... openat resumed>) = 4 [pid 553] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 551] ioctl(4, LOOP_SET_FD, 3 [pid 553] ioctl(4, LOOP_CLR_FD [pid 551] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 553] <... ioctl resumed>) = 0 [pid 551] ioctl(4, LOOP_CLR_FD) = 0 [pid 555] write(3, "1000", 4) = 4 [pid 555] close(3) = 0 [pid 555] write(1, "executing program\n", 18 [pid 553] ioctl(4, LOOP_SET_FD, 3 [pid 551] ioctl(4, LOOP_SET_FD, 3 [pid 553] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 551] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 553] close(4 [pid 551] close(4 [pid 553] <... close resumed>) = 0 [pid 551] <... close resumed>) = 0 [pid 553] close(3 [pid 551] close(3executing program [pid 555] <... write resumed>) = 18 [pid 555] memfd_create("syzkaller", 0 [pid 552] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 555] <... memfd_create resumed>) = 3 [pid 552] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 552] ioctl(4, LOOP_CLR_FD) = 0 [pid 555] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 553] <... close resumed>) = 0 [pid 555] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 552] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 552] close(4) = 0 [pid 552] close(3 [pid 551] <... close resumed>) = 0 [pid 553] chdir("./file0" [pid 551] chdir("./file0" [pid 553] <... chdir resumed>) = 0 [pid 551] <... chdir resumed>) = 0 [pid 553] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 551] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 553] <... open resumed>) = 3 [pid 551] <... open resumed>) = 3 [pid 553] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 551] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 553] <... mount resumed>) = 0 [pid 551] <... mount resumed>) = 0 [pid 553] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 551] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 553] <... open resumed>) = 4 [pid 551] <... open resumed>) = 4 [pid 553] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 551] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 553] <... mmap resumed>) = 0x20000000 [pid 551] <... mmap resumed>) = 0x20000000 [pid 553] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 551] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 553] <... openat resumed>) = 5 [pid 551] <... openat resumed>) = 5 [pid 553] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 551] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 553] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 551] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 553] exit_group(0 [pid 551] exit_group(0 [pid 553] <... exit_group resumed>) = ? [pid 551] <... exit_group resumed>) = ? [pid 553] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=553, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 551] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=551, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 556 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 557 ./strace-static-x86_64: Process 556 attached [pid 552] <... close resumed>) = 0 [pid 552] chdir("./file0") = 0 [pid 552] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 552] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 552] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 552] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 552] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 552] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 552] exit_group(0) = ? [pid 556] set_robust_list(0x55555671f660, 24./strace-static-x86_64: Process 557 attached ) = 0 [pid 557] set_robust_list(0x55555671f660, 24 [pid 556] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 557] <... set_robust_list resumed>) = 0 [pid 556] <... prctl resumed>) = 0 [pid 557] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 556] setpgid(0, 0 [pid 557] <... prctl resumed>) = 0 [pid 556] <... setpgid resumed>) = 0 [pid 557] setpgid(0, 0 [pid 556] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 557] <... setpgid resumed>) = 0 [pid 556] <... openat resumed>) = 3 [pid 557] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 556] write(3, "1000", 4 [pid 557] <... openat resumed>) = 3 [pid 556] <... write resumed>) = 4 [pid 557] write(3, "1000", 4 [pid 556] close(3 [pid 557] <... write resumed>) = 4 [pid 556] <... close resumed>) = 0 [pid 557] close(3 [pid 556] write(1, "executing program\n", 18 [pid 557] <... close resumed>) = 0 [pid 556] <... write resumed>) = 18 [pid 557] write(1, "executing program\n", 18executing program executing program ) = 18 [pid 556] memfd_create("syzkaller", 0 [pid 557] memfd_create("syzkaller", 0) = 3 [pid 556] <... memfd_create resumed>) = 3 [pid 557] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 556] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 557] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 556] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 552] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=552, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 554] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 555] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 557] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 558 [pid 555] <... write resumed>) = 1048576 [pid 556] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 554] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 558 attached [pid 558] set_robust_list(0x55555671f660, 24) = 0 [pid 554] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 558] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 555] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 557] <... write resumed>) = 1048576 [pid 558] <... prctl resumed>) = 0 [pid 558] setpgid(0, 0) = 0 [pid 558] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 554] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 558] <... openat resumed>) = 3 [pid 555] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 554] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 554] ioctl(4, LOOP_CLR_FD [pid 555] ioctl(4, LOOP_SET_FD, 3 [pid 554] <... ioctl resumed>) = 0 [pid 555] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 555] ioctl(4, LOOP_CLR_FD) = 0 [pid 558] write(3, "1000", 4) = 4 [pid 558] close(3) = 0 [pid 558] write(1, "executing program\n", 18executing program ) = 18 [pid 554] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 555] ioctl(4, LOOP_SET_FD, 3 [pid 554] close(4 [pid 555] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 554] <... close resumed>) = 0 [pid 555] close(4) = 0 [pid 554] close(3 [pid 555] close(3 [pid 558] memfd_create("syzkaller", 0 [pid 555] <... close resumed>) = 0 [pid 558] <... memfd_create resumed>) = 3 [pid 558] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 556] <... write resumed>) = 1048576 [pid 555] chdir("./file0") = 0 [pid 555] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 554] <... close resumed>) = 0 [pid 557] munmap(0x7f1ddd1fa000, 138412032 [pid 556] munmap(0x7f1ddd1fa000, 138412032 [pid 554] chdir("./file0" [pid 557] <... munmap resumed>) = 0 [pid 556] <... munmap resumed>) = 0 [pid 557] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 556] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 554] <... chdir resumed>) = 0 [pid 557] <... openat resumed>) = 4 [pid 556] <... openat resumed>) = 4 [pid 554] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 557] ioctl(4, LOOP_SET_FD, 3 [pid 556] ioctl(4, LOOP_SET_FD, 3 [pid 554] <... open resumed>) = 3 [pid 557] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 556] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 554] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 557] ioctl(4, LOOP_CLR_FD [pid 556] ioctl(4, LOOP_CLR_FD [pid 554] <... mount resumed>) = 0 [pid 557] <... ioctl resumed>) = 0 [pid 556] <... ioctl resumed>) = 0 [pid 554] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 554] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 555] <... open resumed>) = 3 [pid 555] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 554] <... mmap resumed>) = 0x20000000 [pid 554] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 556] ioctl(4, LOOP_SET_FD, 3 [pid 554] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 557] ioctl(4, LOOP_SET_FD, 3 [pid 556] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 557] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 556] close(4 [pid 554] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 557] close(4 [pid 556] <... close resumed>) = 0 [pid 554] exit_group(0 [pid 557] <... close resumed>) = 0 [pid 556] close(3 [pid 557] close(3 [pid 554] <... exit_group resumed>) = ? [pid 555] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 555] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 555] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 556] <... close resumed>) = 0 [pid 555] <... openat resumed>) = 5 [pid 555] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 555] exit_group(0) = ? [pid 555] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=555, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 557] <... close resumed>) = 0 [pid 554] +++ exited with 0 +++ [pid 557] chdir("./file0" [pid 556] chdir("./file0" [pid 557] <... chdir resumed>) = 0 [pid 556] <... chdir resumed>) = 0 [pid 557] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 556] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=554, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 557] <... open resumed>) = 3 [pid 556] <... open resumed>) = 3 [pid 557] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 556] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 557] <... mount resumed>) = 0 [pid 556] <... mount resumed>) = 0 [pid 557] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 556] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 557] <... open resumed>) = 4 [pid 556] <... open resumed>) = 4 [pid 557] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 556] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 558] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 557] <... mmap resumed>) = 0x20000000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 557] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 556] <... mmap resumed>) = 0x20000000 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 559 [pid 557] <... openat resumed>) = 5 [pid 557] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 556] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 557] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 557] exit_group(0 [pid 556] <... openat resumed>) = 5 [pid 557] <... exit_group resumed>) = ? [pid 556] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 557] +++ exited with 0 +++ [pid 556] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=557, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 556] exit_group(0) = ? [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 556] +++ exited with 0 +++ [pid 297] close(3 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=556, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] <... close resumed>) = 0 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 560 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 561 [pid 558] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 561 attached [pid 561] set_robust_list(0x55555671f660, 24 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 562 attached ./strace-static-x86_64: Process 559 attached , child_tidptr=0x55555671f650) = 562 [pid 559] set_robust_list(0x55555671f660, 24 [pid 562] set_robust_list(0x55555671f660, 24 [pid 559] <... set_robust_list resumed>) = 0 [pid 562] <... set_robust_list resumed>) = 0 [pid 562] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 559] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 562] <... prctl resumed>) = 0 [pid 559] <... prctl resumed>) = 0 [pid 562] setpgid(0, 0 [pid 559] setpgid(0, 0 [pid 562] <... setpgid resumed>) = 0 [pid 559] <... setpgid resumed>) = 0 [pid 559] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 562] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 559] <... openat resumed>) = 3 executing program executing program [pid 562] <... openat resumed>) = 3 [pid 559] write(3, "1000", 4 [pid 562] write(3, "1000", 4 [pid 559] <... write resumed>) = 4 [pid 562] <... write resumed>) = 4 [pid 559] close(3 [pid 562] close(3 [pid 559] <... close resumed>) = 0 [pid 562] <... close resumed>) = 0 [pid 559] write(1, "executing program\n", 18 [pid 562] write(1, "executing program\n", 18 [pid 559] <... write resumed>) = 18 [pid 562] <... write resumed>) = 18 ./strace-static-x86_64: Process 560 attached [pid 561] <... set_robust_list resumed>) = 0 [pid 559] memfd_create("syzkaller", 0 [pid 558] munmap(0x7f1ddd1fa000, 138412032 [pid 559] <... memfd_create resumed>) = 3 [pid 559] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 561] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 560] set_robust_list(0x55555671f660, 24 [pid 559] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 558] <... munmap resumed>) = 0 [pid 562] memfd_create("syzkaller", 0) = 3 [pid 562] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 561] <... prctl resumed>) = 0 [pid 560] <... set_robust_list resumed>) = 0 [pid 558] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 561] setpgid(0, 0 [pid 560] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 558] <... openat resumed>) = 4 [pid 561] <... setpgid resumed>) = 0 [pid 558] ioctl(4, LOOP_SET_FD, 3 [pid 560] <... prctl resumed>) = 0 [pid 561] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 560] setpgid(0, 0 [pid 558] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 561] <... openat resumed>) = 3 [pid 558] ioctl(4, LOOP_CLR_FD [pid 560] <... setpgid resumed>) = 0 [pid 558] <... ioctl resumed>) = 0 [pid 560] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 561] write(3, "1000", 4 [pid 560] <... openat resumed>) = 3 [pid 561] <... write resumed>) = 4 [pid 561] close(3 [pid 560] write(3, "1000", 4 [pid 561] <... close resumed>) = 0 [pid 560] <... write resumed>) = 4 [pid 561] write(1, "executing program\n", 18 [pid 560] close(3 [pid 558] ioctl(4, LOOP_SET_FD, 3executing program ) = -1 EBUSY (Device or resource busy) [pid 561] <... write resumed>) = 18 [pid 560] <... close resumed>) = 0 [pid 558] close(4) = 0 [pid 561] memfd_create("syzkaller", 0 [pid 558] close(3 [pid 560] write(1, "executing program\n", 18executing program [pid 558] <... close resumed>) = 0 [pid 560] <... write resumed>) = 18 [pid 561] <... memfd_create resumed>) = 3 [pid 560] memfd_create("syzkaller", 0 [pid 561] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 560] <... memfd_create resumed>) = 3 [pid 562] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 560] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 558] chdir("./file0" [pid 559] <... write resumed>) = 1048576 [pid 559] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 559] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 559] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 559] ioctl(4, LOOP_CLR_FD) = 0 [pid 562] <... write resumed>) = 1048576 [pid 559] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 559] close(4) = 0 [pid 559] close(3) = 0 [pid 562] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 562] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 562] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 562] ioctl(4, LOOP_CLR_FD) = 0 [pid 559] chdir("./file0" [pid 560] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 558] <... chdir resumed>) = 0 [pid 558] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 559] <... chdir resumed>) = 0 [pid 559] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 559] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 558] <... open resumed>) = 3 [pid 562] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 562] close(4) = 0 [pid 562] close(3 [pid 558] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 562] <... close resumed>) = 0 [pid 559] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 558] <... mount resumed>) = 0 [pid 559] <... open resumed>) = 4 [pid 558] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 559] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 558] <... open resumed>) = 4 [pid 558] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 559] <... mmap resumed>) = 0x20000000 [pid 559] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 559] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 559] exit_group(0) = ? [pid 561] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 558] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 558] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 558] exit_group(0) = ? [pid 559] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=559, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 558] +++ exited with 0 +++ [pid 562] chdir("./file0" [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=558, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 562] <... chdir resumed>) = 0 [pid 562] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 562] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 562] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 296] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 562] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 561] <... write resumed>) = 1048576 [pid 560] <... write resumed>) = 1048576 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 298] close(3 [pid 296] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 562] <... mmap resumed>) = 0x20000000 [pid 562] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 562] <... openat resumed>) = 5 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 563 [pid 562] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 564 [pid 562] exit_group(0) = ? [pid 560] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 561] munmap(0x7f1ddd1fa000, 138412032 [pid 562] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=562, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 561] <... munmap resumed>) = 0 [pid 560] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 560] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 561] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 560] ioctl(4, LOOP_CLR_FD [pid 561] <... openat resumed>) = 4 [pid 560] <... ioctl resumed>) = 0 [pid 561] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 561] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 564 attached [pid 564] set_robust_list(0x55555671f660, 24 [pid 560] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 560] close(4) = 0 [pid 561] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 560] close(3 [pid 561] close(4) = 0 [pid 561] close(3 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 565 attached ./strace-static-x86_64: Process 563 attached , child_tidptr=0x55555671f650) = 565 [pid 565] set_robust_list(0x55555671f660, 24) = 0 [pid 563] set_robust_list(0x55555671f660, 24 [pid 565] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 563] <... set_robust_list resumed>) = 0 [pid 565] <... prctl resumed>) = 0 [pid 563] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 565] setpgid(0, 0 [pid 563] <... prctl resumed>) = 0 [pid 565] <... setpgid resumed>) = 0 [pid 563] setpgid(0, 0 [pid 565] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 563] <... setpgid resumed>) = 0 executing program [pid 565] <... openat resumed>) = 3 [pid 565] write(3, "1000", 4 [pid 563] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 565] <... write resumed>) = 4 [pid 563] <... openat resumed>) = 3 [pid 565] close(3 [pid 563] write(3, "1000", 4 [pid 565] <... close resumed>) = 0 [pid 563] <... write resumed>) = 4 [pid 565] write(1, "executing program\n", 18 [pid 563] close(3 [pid 565] <... write resumed>) = 18 [pid 563] <... close resumed>) = 0 [pid 565] memfd_create("syzkaller", 0 [pid 563] write(1, "executing program\n", 18executing program [pid 565] <... memfd_create resumed>) = 3 [pid 563] <... write resumed>) = 18 [pid 565] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 563] memfd_create("syzkaller", 0 [pid 561] <... close resumed>) = 0 [pid 564] <... set_robust_list resumed>) = 0 [pid 564] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 560] <... close resumed>) = 0 [pid 564] <... prctl resumed>) = 0 [pid 564] setpgid(0, 0) = 0 [pid 564] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 564] write(3, "1000", 4) = 4 [pid 564] close(3 [pid 565] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 564] <... close resumed>) = 0 [pid 563] <... memfd_create resumed>) = 3 [pid 563] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 564] write(1, "executing program\n", 18executing program ) = 18 [pid 564] memfd_create("syzkaller", 0) = 3 [pid 564] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 560] chdir("./file0") = 0 [pid 561] chdir("./file0" [pid 560] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 561] <... chdir resumed>) = 0 [pid 560] <... open resumed>) = 3 [pid 561] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 563] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 560] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 561] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 560] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 561] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 560] <... open resumed>) = 4 [pid 561] <... open resumed>) = 4 [pid 561] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 560] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 561] <... mmap resumed>) = 0x20000000 [pid 560] <... mmap resumed>) = 0x20000000 [pid 560] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 561] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 560] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 560] exit_group(0 [pid 561] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 561] exit_group(0 [pid 560] <... exit_group resumed>) = ? [pid 560] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=560, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 561] <... exit_group resumed>) = ? [pid 561] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=561, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 563] <... write resumed>) = 1048576 [pid 565] <... write resumed>) = 1048576 [pid 563] munmap(0x7f1ddd1fa000, 138412032 [pid 565] munmap(0x7f1ddd1fa000, 138412032 [pid 563] <... munmap resumed>) = 0 [pid 565] <... munmap resumed>) = 0 [pid 563] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 565] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 563] <... openat resumed>) = 4 [pid 565] <... openat resumed>) = 4 [pid 563] ioctl(4, LOOP_SET_FD, 3 [pid 565] ioctl(4, LOOP_SET_FD, 3 [pid 563] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 565] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 563] ioctl(4, LOOP_CLR_FD [pid 565] ioctl(4, LOOP_CLR_FD [pid 563] <... ioctl resumed>) = 0 [pid 565] <... ioctl resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 565] ioctl(4, LOOP_SET_FD, 3 [pid 563] ioctl(4, LOOP_SET_FD, 3 [pid 565] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 563] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 565] close(4 [pid 563] close(4 [pid 565] <... close resumed>) = 0 [pid 563] <... close resumed>) = 0 [pid 297] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 565] close(3 [pid 563] close(3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 295] close(3 [pid 297] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 567 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 566 [pid 564] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 563] <... close resumed>) = 0 [pid 565] <... close resumed>) = 0 [pid 563] chdir("./file0" [pid 565] chdir("./file0" [pid 563] <... chdir resumed>) = 0 [pid 565] <... chdir resumed>) = 0 [pid 563] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 566 attached [pid 565] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 563] <... open resumed>) = 3 [pid 563] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 565] <... open resumed>) = 3 [pid 563] <... mount resumed>) = 0 [pid 565] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 563] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 565] <... mount resumed>) = 0 [pid 563] <... open resumed>) = 4 [pid 565] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 563] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 565] <... open resumed>) = 4 [pid 566] set_robust_list(0x55555671f660, 24) = 0 [pid 566] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 565] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 563] <... mmap resumed>) = 0x20000000 [pid 566] <... prctl resumed>) = 0 [pid 566] setpgid(0, 0) = 0 [pid 566] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 565] <... mmap resumed>) = 0x20000000 [pid 563] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 566] <... openat resumed>) = 3 [pid 566] write(3, "1000", 4) = 4 [pid 566] close(3) = 0 [pid 566] write(1, "executing program\n", 18executing program ) = 18 [pid 563] <... openat resumed>) = 5 ./strace-static-x86_64: Process 567 attached [pid 565] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 563] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 567] set_robust_list(0x55555671f660, 24 [pid 565] <... openat resumed>) = 5 [pid 563] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 567] <... set_robust_list resumed>) = 0 [pid 565] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 567] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 565] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 563] exit_group(0 [pid 567] <... prctl resumed>) = 0 [pid 565] exit_group(0 [pid 563] <... exit_group resumed>) = ? [pid 565] <... exit_group resumed>) = ? [pid 563] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=563, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 566] memfd_create("syzkaller", 0) = 3 [pid 566] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 565] +++ exited with 0 +++ [pid 567] setpgid(0, 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=565, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 566] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 567] <... setpgid resumed>) = 0 [pid 567] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 567] write(3, "1000", 4) = 4 [pid 567] close(3) = 0 executing program [pid 567] write(1, "executing program\n", 18 [pid 299] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 567] <... write resumed>) = 18 [pid 567] memfd_create("syzkaller", 0) = 3 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 567] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 299] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 567] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 296] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 296] close(3 [pid 299] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 568 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 569 [pid 564] <... write resumed>) = 1048576 [pid 564] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 564] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 564] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 564] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 569 attached [pid 569] set_robust_list(0x55555671f660, 24) = 0 [pid 569] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 569] setpgid(0, 0 [pid 564] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 564] close(4) = 0 [pid 567] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 564] close(3) = 0 [pid 569] <... setpgid resumed>) = 0 [pid 569] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 569] write(3, "1000", 4) = 4 [pid 569] close(3) = 0 [pid 567] <... write resumed>) = 1048576 executing program [pid 569] write(1, "executing program\n", 18) = 18 [pid 569] memfd_create("syzkaller", 0) = 3 [pid 569] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 564] chdir("./file0") = 0 ./strace-static-x86_64: Process 568 attached [pid 567] munmap(0x7f1ddd1fa000, 138412032 [pid 564] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 568] set_robust_list(0x55555671f660, 24 [pid 567] <... munmap resumed>) = 0 [pid 568] <... set_robust_list resumed>) = 0 [pid 568] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 567] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 568] <... prctl resumed>) = 0 [pid 568] setpgid(0, 0 [pid 567] <... openat resumed>) = 4 [pid 568] <... setpgid resumed>) = 0 [pid 567] ioctl(4, LOOP_SET_FD, 3 [pid 568] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 567] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program [pid 568] <... openat resumed>) = 3 [pid 567] ioctl(4, LOOP_CLR_FD [pid 568] write(3, "1000", 4 [pid 567] <... ioctl resumed>) = 0 [pid 568] <... write resumed>) = 4 [pid 568] close(3) = 0 [pid 568] write(1, "executing program\n", 18) = 18 [pid 568] memfd_create("syzkaller", 0) = 3 [pid 568] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 564] <... open resumed>) = 3 [pid 564] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 564] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 564] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 564] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 564] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 564] exit_group(0) = ? [pid 564] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=564, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 568] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 567] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 567] close(4) = 0 [pid 567] close(3) = 0 [pid 566] <... write resumed>) = 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3 [pid 568] <... write resumed>) = 1048576 [pid 567] chdir("./file0" [pid 298] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 570 [pid 566] munmap(0x7f1ddd1fa000, 138412032 [pid 569] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 566] <... munmap resumed>) = 0 [pid 569] <... write resumed>) = 1048576 [pid 566] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 568] munmap(0x7f1ddd1fa000, 138412032 [pid 567] <... chdir resumed>) = 0 [pid 567] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 566] <... openat resumed>) = 4 [pid 568] <... munmap resumed>) = 0 [pid 567] <... open resumed>) = 3 [pid 568] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 567] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 568] <... openat resumed>) = 4 [pid 568] ioctl(4, LOOP_SET_FD, 3 [pid 567] <... mount resumed>) = 0 [pid 568] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 567] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 568] ioctl(4, LOOP_CLR_FD) = 0 [pid 567] <... open resumed>) = 4 [pid 567] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 566] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 566] ioctl(4, LOOP_CLR_FD) = 0 [pid 567] <... mmap resumed>) = 0x20000000 [pid 567] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 568] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 567] <... openat resumed>) = 5 [pid 568] close(4 [pid 567] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 568] <... close resumed>) = 0 [pid 567] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 568] close(3 [pid 567] exit_group(0) = ? ./strace-static-x86_64: Process 570 attached [pid 570] set_robust_list(0x55555671f660, 24) = 0 [pid 570] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 567] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=567, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 566] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 566] close(4) = 0 [pid 566] close(3 [pid 568] <... close resumed>) = 0 [pid 566] <... close resumed>) = 0 [pid 570] <... prctl resumed>) = 0 [pid 570] setpgid(0, 0) = 0 [pid 570] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 566] chdir("./file0") = 0 [pid 570] <... openat resumed>) = 3 [pid 566] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 570] write(3, "1000", 4) = 4 [pid 570] close(3) = 0 [pid 566] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 570] write(1, "executing program\n", 18executing program ) = 18 [pid 570] memfd_create("syzkaller", 0 [pid 566] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 570] <... memfd_create resumed>) = 3 [pid 570] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 566] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 568] chdir("./file0"./strace-static-x86_64: Process 571 attached ) = 0 [pid 571] set_robust_list(0x55555671f660, 24 [pid 568] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 571 [pid 571] <... set_robust_list resumed>) = 0 [pid 568] <... open resumed>) = 3 [pid 571] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 568] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 571] <... prctl resumed>) = 0 [pid 568] <... mount resumed>) = 0 [pid 571] setpgid(0, 0 [pid 568] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 571] <... setpgid resumed>) = 0 [pid 568] <... open resumed>) = 4 [pid 571] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 568] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 571] <... openat resumed>) = 3 [pid 568] <... mmap resumed>) = 0x20000000 [pid 571] write(3, "1000", 4 [pid 568] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 571] <... write resumed>) = 4 [pid 568] <... openat resumed>) = 5 [pid 571] close(3 [pid 568] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 571] <... close resumed>) = 0 [pid 568] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 571] write(1, "executing program\n", 18executing program ) = 18 [pid 568] exit_group(0 [pid 571] memfd_create("syzkaller", 0 [pid 568] <... exit_group resumed>) = ? [pid 571] <... memfd_create resumed>) = 3 [pid 568] +++ exited with 0 +++ [pid 571] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=568, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 571] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 569] munmap(0x7f1ddd1fa000, 138412032 [pid 566] <... mmap resumed>) = 0x20000000 [pid 569] <... munmap resumed>) = 0 [pid 569] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 569] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 571] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 569] ioctl(4, LOOP_CLR_FD) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 572 [pid 566] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 566] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 566] exit_group(0) = ? [pid 569] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 569] close(4) = 0 [pid 569] close(3) = 0 [pid 566] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=566, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 569] chdir("./file0") = 0 [pid 569] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 569] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 569] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 569] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 571] <... write resumed>) = 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 573 [pid 569] <... mmap resumed>) = 0x20000000 [pid 569] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 569] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 569] exit_group(0) = ? [pid 569] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=569, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 572 attached [pid 571] munmap(0x7f1ddd1fa000, 138412032 [pid 570] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 572] set_robust_list(0x55555671f660, 24) = 0 [pid 572] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 572] setpgid(0, 0 [pid 571] <... munmap resumed>) = 0 [pid 572] <... setpgid resumed>) = 0 [pid 571] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 572] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 571] <... openat resumed>) = 4 ./strace-static-x86_64: Process 573 attached [pid 572] write(3, "1000", 4 [pid 571] ioctl(4, LOOP_SET_FD, 3 [pid 573] set_robust_list(0x55555671f660, 24) = 0 [pid 572] <... write resumed>) = 4 [pid 571] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 572] close(3 [pid 571] ioctl(4, LOOP_CLR_FD [pid 573] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 572] <... close resumed>) = 0 [pid 571] <... ioctl resumed>) = 0 [pid 572] write(1, "executing program\n", 18 executing program [pid 573] <... prctl resumed>) = 0 [pid 572] <... write resumed>) = 18 [pid 573] setpgid(0, 0) = 0 [pid 572] memfd_create("syzkaller", 0) = 3 [pid 572] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 573] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program ) = 3 [pid 573] write(3, "1000", 4) = 4 [pid 573] close(3) = 0 [pid 573] write(1, "executing program\n", 18) = 18 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 574 [pid 573] memfd_create("syzkaller", 0) = 3 [pid 573] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 571] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 571] close(4) = 0 [pid 571] close(3 [pid 570] <... write resumed>) = 1048576 [pid 571] <... close resumed>) = 0 [pid 570] munmap(0x7f1ddd1fa000, 138412032 [pid 571] chdir("./file0" [pid 570] <... munmap resumed>) = 0 [pid 571] <... chdir resumed>) = 0 [pid 570] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 570] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 570] ioctl(4, LOOP_CLR_FD) = 0 executing program [pid 571] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 574 attached [pid 574] set_robust_list(0x55555671f660, 24) = 0 [pid 574] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 574] setpgid(0, 0) = 0 [pid 574] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 574] write(3, "1000", 4) = 4 [pid 574] close(3) = 0 [pid 570] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 570] close(4) = 0 [pid 570] close(3 [pid 574] write(1, "executing program\n", 18) = 18 [pid 574] memfd_create("syzkaller", 0) = 3 [pid 571] <... open resumed>) = 3 [pid 574] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 571] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 571] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 571] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 570] <... close resumed>) = 0 [pid 572] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 571] <... mmap resumed>) = 0x20000000 [pid 570] chdir("./file0") = 0 [pid 571] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 570] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 571] <... openat resumed>) = 5 [pid 573] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 570] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 570] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 570] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 572] <... write resumed>) = 1048576 [pid 571] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 572] munmap(0x7f1ddd1fa000, 138412032 [pid 571] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 571] exit_group(0) = ? [pid 570] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 571] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=571, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 570] <... openat resumed>) = 5 [pid 572] <... munmap resumed>) = 0 [pid 570] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 572] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 572] ioctl(4, LOOP_SET_FD, 3 [pid 570] exit_group(0 [pid 572] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 570] <... exit_group resumed>) = ? [pid 572] ioctl(4, LOOP_CLR_FD) = 0 [pid 570] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=570, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 572] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 572] close(4) = 0 [pid 572] close(3 [pid 297] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 297] ioctl(3, LOOP_CLR_FD [pid 298] <... openat resumed>) = 3 [pid 297] <... ioctl resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 297] close(3 [pid 298] <... ioctl resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 298] close(3 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 572] <... close resumed>) = 0 [pid 572] chdir("./file0" [pid 298] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 575 [pid 572] <... chdir resumed>) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 576 [pid 572] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 572] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 572] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 572] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 574] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 572] <... mmap resumed>) = 0x20000000 [pid 572] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 572] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 572] exit_group(0) = ? [pid 572] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=572, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 573] <... write resumed>) = 1048576 [pid 573] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 573] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 573] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 573] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 576 attached [pid 576] set_robust_list(0x55555671f660, 24) = 0 [pid 576] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 574] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 575 attached [pid 573] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 573] close(4) = 0 [pid 573] close(3 [pid 575] set_robust_list(0x55555671f660, 24 [pid 299] <... restart_syscall resumed>) = 0 [pid 575] <... set_robust_list resumed>) = 0 [pid 575] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 575] <... prctl resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 577 [pid 575] setpgid(0, 0) = 0 [pid 576] <... prctl resumed>) = 0 [pid 576] setpgid(0, 0) = 0 [pid 575] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 576] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 575] write(3, "1000", 4) = 4 [pid 576] <... openat resumed>) = 3 [pid 575] close(3 [pid 576] write(3, "1000", 4) = 4 [pid 576] close(3executing program ) = 0 [pid 575] <... close resumed>) = 0 [pid 576] write(1, "executing program\n", 18) = 18 [pid 576] memfd_create("syzkaller", 0 [pid 575] write(1, "executing program\n", 18executing program [pid 576] <... memfd_create resumed>) = 3 [pid 575] <... write resumed>) = 18 [pid 576] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 575] memfd_create("syzkaller", 0) = 3 [pid 575] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 573] <... close resumed>) = 0 [pid 573] chdir("./file0") = 0 [pid 573] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 574] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 573] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 573] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 577 attached [pid 577] set_robust_list(0x55555671f660, 24 [pid 573] <... open resumed>) = 4 [pid 574] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 574] ioctl(4, LOOP_SET_FD, 3 [pid 573] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 577] <... set_robust_list resumed>) = 0 [pid 574] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 574] ioctl(4, LOOP_CLR_FD) = 0 [pid 573] <... mmap resumed>) = 0x20000000 [pid 573] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 575] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 573] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 574] ioctl(4, LOOP_SET_FD, 3 [pid 577] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 574] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 574] close(4) = 0 [pid 574] close(3 [pid 573] exit_group(0) = ? [pid 573] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=573, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 574] <... close resumed>) = 0 [pid 574] chdir("./file0") = 0 [pid 574] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 574] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 577] <... prctl resumed>) = 0 [pid 574] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 577] setpgid(0, 0) = 0 [pid 574] <... open resumed>) = 4 [pid 574] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 577] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 577] write(3, "1000", 4) = 4 [pid 577] close(3) = 0 [pid 577] write(1, "executing program\n", 18executing program ) = 18 [pid 577] memfd_create("syzkaller", 0) = 3 [pid 577] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 576] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 577] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 578 [pid 574] <... mmap resumed>) = 0x20000000 [pid 574] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 574] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 574] exit_group(0) = ? [pid 574] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=574, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 576] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 578 attached [pid 578] set_robust_list(0x55555671f660, 24) = 0 [pid 578] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 578] setpgid(0, 0) = 0 [pid 578] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 576] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 578] write(3, "1000", 4) = 4 [pid 578] close(3) = 0 executing program [pid 578] write(1, "executing program\n", 18) = 18 [pid 578] memfd_create("syzkaller", 0) = 3 [pid 576] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 578] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 576] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 576] ioctl(4, LOOP_CLR_FD) = 0 [pid 576] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 576] close(4) = 0 [pid 576] close(3 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 579 [pid 577] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 575] <... write resumed>) = 1048576 [pid 575] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 575] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 575] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 575] ioctl(4, LOOP_CLR_FD) = 0 [pid 576] <... close resumed>) = 0 [pid 576] chdir("./file0") = 0 [pid 576] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 576] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 576] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 576] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 576] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 575] ioctl(4, LOOP_SET_FD, 3 [pid 576] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 576] exit_group(0 [pid 575] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 575] close(4 [pid 576] <... exit_group resumed>) = ? [pid 575] <... close resumed>) = 0 [pid 575] close(3 [pid 578] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 576] +++ exited with 0 +++ [pid 575] <... close resumed>) = 0 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=576, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 575] chdir("./file0") = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 575] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 580 [pid 578] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 579 attached [pid 579] set_robust_list(0x55555671f660, 24) = 0 [pid 579] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 579] setpgid(0, 0 [pid 575] <... open resumed>) = 3 [pid 579] <... setpgid resumed>) = 0 executing program [pid 575] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 579] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 579] write(3, "1000", 4) = 4 [pid 579] close(3) = 0 [pid 579] write(1, "executing program\n", 18) = 18 [pid 577] <... write resumed>) = 1048576 [pid 579] memfd_create("syzkaller", 0) = 3 [pid 577] munmap(0x7f1ddd1fa000, 138412032 [pid 575] <... mount resumed>) = 0 [pid 579] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 575] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 577] <... munmap resumed>) = 0 [pid 575] <... open resumed>) = 4 [pid 577] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 575] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 577] <... openat resumed>) = 4 [pid 575] <... mmap resumed>) = 0x20000000 [pid 577] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 580 attached [pid 580] set_robust_list(0x55555671f660, 24) = 0 [pid 580] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 577] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 575] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 580] <... prctl resumed>) = 0 [pid 575] <... openat resumed>) = 5 [pid 580] setpgid(0, 0 [pid 575] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 577] ioctl(4, LOOP_CLR_FD) = 0 [pid 575] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 580] <... setpgid resumed>) = 0 [pid 575] exit_group(0 [pid 580] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 575] <... exit_group resumed>) = ? [pid 578] munmap(0x7f1ddd1fa000, 138412032 [pid 575] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=575, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>executing program [pid 580] <... openat resumed>) = 3 [pid 578] <... munmap resumed>) = 0 [pid 580] write(3, "1000", 4) = 4 [pid 580] close(3) = 0 [pid 578] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 580] write(1, "executing program\n", 18 [pid 578] <... openat resumed>) = 4 [pid 580] <... write resumed>) = 18 [pid 580] memfd_create("syzkaller", 0 [pid 578] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 578] ioctl(4, LOOP_CLR_FD) = 0 [pid 577] ioctl(4, LOOP_SET_FD, 3 [pid 580] <... memfd_create resumed>) = 3 [pid 577] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 580] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 577] close(4) = 0 [pid 577] close(3) = 0 [pid 578] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 578] close(4) = 0 [pid 578] close(3 [pid 577] chdir("./file0" [pid 578] <... close resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 581 [pid 577] <... chdir resumed>) = 0 [pid 578] chdir("./file0" [pid 577] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 578] <... chdir resumed>) = 0 [pid 578] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 577] <... open resumed>) = 3 ./strace-static-x86_64: Process 581 attached [pid 577] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 578] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 577] <... mount resumed>) = 0 [pid 581] set_robust_list(0x55555671f660, 24 [pid 577] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 578] <... mount resumed>) = 0 [pid 581] <... set_robust_list resumed>) = 0 [pid 578] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 581] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 577] <... open resumed>) = 4 [pid 578] <... open resumed>) = 4 [pid 581] <... prctl resumed>) = 0 [pid 577] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 578] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 581] setpgid(0, 0 [pid 577] <... mmap resumed>) = 0x20000000 [pid 581] <... setpgid resumed>) = 0 [pid 581] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 577] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 581] <... openat resumed>) = 3 [pid 577] <... openat resumed>) = 5 [pid 581] write(3, "1000", 4 [pid 578] <... mmap resumed>) = 0x20000000 [pid 578] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 581] <... write resumed>) = 4 [pid 577] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 581] close(3 [pid 577] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 581] <... close resumed>) = 0 [pid 581] write(1, "executing program\n", 18 executing program [pid 577] exit_group(0 [pid 581] <... write resumed>) = 18 [pid 577] <... exit_group resumed>) = ? [pid 578] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 579] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 578] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 578] exit_group(0 [pid 581] memfd_create("syzkaller", 0 [pid 578] <... exit_group resumed>) = ? [pid 577] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=577, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 581] <... memfd_create resumed>) = 3 [pid 581] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 581] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 578] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=578, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 580] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 581] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 579] <... write resumed>) = 1048576 [pid 579] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 579] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 579] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 579] ioctl(4, LOOP_CLR_FD) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 582 [pid 579] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 579] close(4) = 0 [pid 579] close(3) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 583 [pid 580] <... write resumed>) = 1048576 [pid 580] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 580] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 580] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 580] ioctl(4, LOOP_CLR_FD) = 0 [pid 579] chdir("./file0") = 0 [pid 579] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 579] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 579] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 580] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 580] close(4) = 0 [pid 580] close(3executing program [pid 581] <... write resumed>) = 1048576 [pid 579] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 580] <... close resumed>) = 0 [pid 579] <... mmap resumed>) = 0x20000000 [pid 579] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 582 attached ) = 5 [pid 582] set_robust_list(0x55555671f660, 24) = 0 [pid 582] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 579] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 579] exit_group(0 [pid 582] <... prctl resumed>) = 0 [pid 582] setpgid(0, 0 [pid 579] <... exit_group resumed>) = ? [pid 579] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=579, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 582] <... setpgid resumed>) = 0 [pid 582] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 582] write(3, "1000", 4) = 4 [pid 582] close(3) = 0 [pid 582] write(1, "executing program\n", 18) = 18 [pid 582] memfd_create("syzkaller", 0) = 3 [pid 582] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 580] chdir("./file0") = 0 [pid 581] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 583 attached [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 581] <... munmap resumed>) = 0 [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 583] set_robust_list(0x55555671f660, 24 [pid 581] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 584 [pid 580] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 583] <... set_robust_list resumed>) = 0 [pid 581] <... openat resumed>) = 4 [pid 581] ioctl(4, LOOP_SET_FD, 3 [pid 580] <... open resumed>) = 3 [pid 583] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 580] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 583] <... prctl resumed>) = 0 [pid 581] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 581] ioctl(4, LOOP_CLR_FD [pid 580] <... mount resumed>) = 0 [pid 583] setpgid(0, 0) = 0 [pid 581] <... ioctl resumed>) = 0 [pid 583] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 580] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 583] <... openat resumed>) = 3 [pid 583] write(3, "1000", 4) = 4 [pid 580] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 583] close(3) = 0 [pid 583] write(1, "executing program\n", 18executing program [pid 581] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 583] <... write resumed>) = 18 [pid 581] close(4 [pid 583] memfd_create("syzkaller", 0 [pid 581] <... close resumed>) = 0 [pid 581] close(3 [pid 583] <... memfd_create resumed>) = 3 [pid 580] <... mmap resumed>) = 0x20000000 [pid 581] <... close resumed>) = 0 [pid 580] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 583] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 581] chdir("./file0" [pid 580] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 583] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 580] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 580] exit_group(0) = ? [pid 580] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=580, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 582] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 585 [pid 583] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 581] <... chdir resumed>) = 0 executing program [pid 581] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 582] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 585 attached [pid 585] set_robust_list(0x55555671f660, 24) = 0 [pid 585] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 582] munmap(0x7f1ddd1fa000, 138412032 [pid 585] <... prctl resumed>) = 0 [pid 585] setpgid(0, 0) = 0 [pid 585] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 582] <... munmap resumed>) = 0 [pid 582] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 582] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 585] write(3, "1000", 4 [pid 582] ioctl(4, LOOP_CLR_FD [pid 585] <... write resumed>) = 4 [pid 582] <... ioctl resumed>) = 0 [pid 585] close(3) = 0 [pid 585] write(1, "executing program\n", 18) = 18 [pid 585] memfd_create("syzkaller", 0) = 3 [pid 585] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 582] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 582] close(4) = 0 [pid 582] close(3 [pid 581] <... open resumed>) = 3 [pid 581] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 584 attached ) = 0 [pid 581] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 584] set_robust_list(0x55555671f660, 24 [pid 582] <... close resumed>) = 0 [pid 582] chdir("./file0") = 0 [pid 582] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 581] <... open resumed>) = 4 [pid 581] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 584] <... set_robust_list resumed>) = 0 [pid 582] <... open resumed>) = 3 [pid 581] <... mmap resumed>) = 0x20000000 [pid 582] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 581] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 584] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 582] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 584] <... prctl resumed>) = 0 [pid 581] <... openat resumed>) = 5 [pid 582] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 581] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 584] setpgid(0, 0) = 0 [pid 581] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 581] exit_group(0 [pid 584] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 581] <... exit_group resumed>) = ? [pid 582] <... mmap resumed>) = 0x20000000 [pid 581] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=581, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 584] <... openat resumed>) = 3 [pid 582] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 582] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 586 [pid 584] write(3, "1000", 4 [pid 583] <... write resumed>) = 1048576 [pid 582] exit_group(0) = ? [pid 584] <... write resumed>) = 4 [pid 583] munmap(0x7f1ddd1fa000, 138412032 [pid 584] close(3) = 0 [pid 584] write(1, "executing program\n", 18executing program ) = 18 [pid 584] memfd_create("syzkaller", 0 [pid 583] <... munmap resumed>) = 0 [pid 584] <... memfd_create resumed>) = 3 [pid 583] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 584] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 583] <... openat resumed>) = 4 [pid 582] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=582, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>executing program [pid 585] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 586 attached [pid 586] set_robust_list(0x55555671f660, 24) = 0 [pid 586] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 586] setpgid(0, 0) = 0 [pid 586] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 586] write(3, "1000", 4) = 4 [pid 586] close(3) = 0 [pid 586] write(1, "executing program\n", 18) = 18 [pid 586] memfd_create("syzkaller", 0) = 3 [pid 586] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 584] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 583] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 583] ioctl(4, LOOP_CLR_FD) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 587 [pid 583] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 583] close(4) = 0 [pid 583] close(3 [pid 585] <... write resumed>) = 1048576 [pid 585] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 583] <... close resumed>) = 0 [pid 585] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 585] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 585] ioctl(4, LOOP_CLR_FD) = 0 [pid 583] chdir("./file0") = 0 [pid 583] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 585] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 585] close(4) = 0 [pid 585] close(3 [pid 583] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 583] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 587 attached [pid 587] set_robust_list(0x55555671f660, 24) = 0 [pid 587] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 583] <... open resumed>) = 4 [pid 583] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 587] <... prctl resumed>) = 0 [pid 587] setpgid(0, 0) = 0 [pid 587] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 583] <... mmap resumed>) = 0x20000000 [pid 586] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 587] write(3, "1000", 4) = 4 [pid 587] close(3) = 0 executing program [pid 587] write(1, "executing program\n", 18 [pid 583] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 587] <... write resumed>) = 18 [pid 587] memfd_create("syzkaller", 0) = 3 [pid 583] <... openat resumed>) = 5 [pid 587] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 585] <... close resumed>) = 0 [pid 583] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 585] chdir("./file0") = 0 [pid 583] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 585] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 583] exit_group(0) = ? [pid 583] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=583, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 585] <... open resumed>) = 3 [pid 585] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 584] <... write resumed>) = 1048576 [pid 585] <... mount resumed>) = 0 [pid 585] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 585] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 584] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 584] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 584] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 584] ioctl(4, LOOP_CLR_FD) = 0 [pid 584] ioctl(4, LOOP_SET_FD, 3 [pid 585] <... mmap resumed>) = 0x20000000 [pid 585] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 584] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 585] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 584] close(4 [pid 585] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 585] exit_group(0) = ? [pid 584] <... close resumed>) = 0 [pid 584] close(3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 588 [pid 585] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=585, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 584] <... close resumed>) = 0 [pid 584] chdir("./file0") = 0 [pid 584] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 584] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 584] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 584] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 584] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 586] <... write resumed>) = 1048576 [pid 586] munmap(0x7f1ddd1fa000, 138412032 [pid 584] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 586] <... munmap resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 584] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 584] exit_group(0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 584] <... exit_group resumed>) = ? [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 589 [pid 586] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 586] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 586] ioctl(4, LOOP_CLR_FD [pid 584] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=584, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 586] <... ioctl resumed>) = 0 [pid 587] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 586] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 586] close(4) = 0 [pid 586] close(3./strace-static-x86_64: Process 588 attached [pid 588] set_robust_list(0x55555671f660, 24) = 0 [pid 588] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 296] <... restart_syscall resumed>) = 0 [pid 588] <... prctl resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 588] setpgid(0, 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 590 [pid 588] <... setpgid resumed>) = 0 [pid 588] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 588] write(3, "1000", 4) = 4 [pid 588] close(3) = 0 [pid 588] write(1, "executing program\n", 18executing program ) = 18 [pid 588] memfd_create("syzkaller", 0) = 3 [pid 588] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 586] <... close resumed>) = 0 [pid 586] chdir("./file0") = 0 [pid 586] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 587] <... write resumed>) = 1048576 [pid 586] <... open resumed>) = 3 ./strace-static-x86_64: Process 589 attached [pid 586] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 589] set_robust_list(0x55555671f660, 24) = 0 [pid 589] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 586] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 589] <... prctl resumed>) = 0 [pid 589] setpgid(0, 0) = 0 [pid 589] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 586] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 588] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 589] <... openat resumed>) = 3 [pid 589] write(3, "1000", 4) = 4 [pid 589] close(3executing program ) = 0 [pid 589] write(1, "executing program\n", 18) = 18 [pid 589] memfd_create("syzkaller", 0) = 3 [pid 589] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 586] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 590 attached [pid 590] set_robust_list(0x55555671f660, 24 [pid 586] <... openat resumed>) = 5 [pid 586] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 590] <... set_robust_list resumed>) = 0 [pid 586] exit_group(0) = ? [pid 590] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 590] setpgid(0, 0) = 0 [pid 590] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 587] munmap(0x7f1ddd1fa000, 138412032 [pid 590] write(3, "1000", 4) = 4 [pid 590] close(3 [pid 587] <... munmap resumed>) = 0 [pid 590] <... close resumed>) = 0 [pid 587] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 586] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=586, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 590] write(1, "executing program\n", 18 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 587] ioctl(4, LOOP_SET_FD, 3executing program ) = -1 EBUSY (Device or resource busy) [pid 590] <... write resumed>) = 18 [pid 587] ioctl(4, LOOP_CLR_FD [pid 590] memfd_create("syzkaller", 0 [pid 587] <... ioctl resumed>) = 0 [pid 590] <... memfd_create resumed>) = 3 [pid 590] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 587] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 587] close(4) = 0 [pid 587] close(3) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 591 [pid 587] chdir("./file0") = 0 [pid 587] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 587] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 587] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 587] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 587] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 587] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 587] exit_group(0) = ? [pid 590] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 589] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 591 attached [pid 591] set_robust_list(0x55555671f660, 24) = 0 [pid 591] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 587] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=587, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 591] <... prctl resumed>) = 0 [pid 591] setpgid(0, 0) = 0 executing program [pid 591] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 591] write(3, "1000", 4) = 4 [pid 591] close(3) = 0 [pid 591] write(1, "executing program\n", 18) = 18 [pid 591] memfd_create("syzkaller", 0) = 3 [pid 588] <... write resumed>) = 1048576 [pid 591] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 592 [pid 588] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 589] <... write resumed>) = 1048576 executing program [pid 589] munmap(0x7f1ddd1fa000, 138412032) = 0 ./strace-static-x86_64: Process 592 attached [pid 592] set_robust_list(0x55555671f660, 24) = 0 [pid 592] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 592] setpgid(0, 0 [pid 589] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 592] <... setpgid resumed>) = 0 [pid 592] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 589] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 589] ioctl(4, LOOP_CLR_FD) = 0 [pid 592] <... openat resumed>) = 3 [pid 592] write(3, "1000", 4) = 4 [pid 592] close(3) = 0 [pid 592] write(1, "executing program\n", 18) = 18 [pid 592] memfd_create("syzkaller", 0) = 3 [pid 592] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 588] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 589] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 589] close(4) = 0 [pid 589] close(3 [pid 588] <... openat resumed>) = 4 [pid 588] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 589] <... close resumed>) = 0 [pid 589] chdir("./file0" [pid 588] ioctl(4, LOOP_CLR_FD [pid 589] <... chdir resumed>) = 0 [pid 589] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 590] <... write resumed>) = 1048576 [pid 588] <... ioctl resumed>) = 0 [pid 590] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 590] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 590] ioctl(4, LOOP_SET_FD, 3 [pid 589] <... open resumed>) = 3 [pid 589] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 590] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 590] ioctl(4, LOOP_CLR_FD [pid 588] ioctl(4, LOOP_SET_FD, 3 [pid 590] <... ioctl resumed>) = 0 [pid 588] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 591] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 588] close(4) = 0 [pid 589] <... mount resumed>) = 0 [pid 588] close(3 [pid 589] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 588] <... close resumed>) = 0 [pid 589] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 588] chdir("./file0") = 0 [pid 590] ioctl(4, LOOP_SET_FD, 3 [pid 588] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 590] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 588] <... open resumed>) = 3 [pid 590] close(4 [pid 588] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 590] <... close resumed>) = 0 [pid 588] <... mount resumed>) = 0 [pid 590] close(3 [pid 588] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 588] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 589] <... mmap resumed>) = 0x20000000 [pid 589] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 589] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 589] exit_group(0 [pid 588] <... mmap resumed>) = 0x20000000 [pid 589] <... exit_group resumed>) = ? [pid 588] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 590] <... close resumed>) = 0 [pid 588] <... openat resumed>) = 5 [pid 590] chdir("./file0" [pid 588] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 590] <... chdir resumed>) = 0 [pid 588] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 590] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 588] exit_group(0) = ? [pid 590] <... open resumed>) = 3 [pid 588] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=588, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 589] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=589, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 590] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 590] <... mount resumed>) = 0 [pid 592] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 593 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 594 [pid 591] <... write resumed>) = 1048576 [pid 591] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 590] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 594 attached [pid 591] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 590] <... open resumed>) = 4 [pid 591] <... openat resumed>) = 4 [pid 591] ioctl(4, LOOP_SET_FD, 3 [pid 590] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 591] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 591] ioctl(4, LOOP_CLR_FD) = 0 [pid 590] <... mmap resumed>) = 0x20000000 [pid 594] set_robust_list(0x55555671f660, 24 [pid 590] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 591] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 591] close(4) = 0 [pid 591] close(3 [pid 590] <... openat resumed>) = 5 [pid 594] <... set_robust_list resumed>) = 0 [pid 590] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 594] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 590] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 594] <... prctl resumed>) = 0 [pid 590] exit_group(0 [pid 594] setpgid(0, 0 [pid 590] <... exit_group resumed>) = ? [pid 590] +++ exited with 0 +++ [pid 594] <... setpgid resumed>) = 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=590, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 594] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 594] write(3, "1000", 4) = 4 [pid 594] close(3) = 0 [pid 594] write(1, "executing program\n", 18executing program ) = 18 [pid 594] memfd_create("syzkaller", 0./strace-static-x86_64: Process 593 attached ) = 3 [pid 593] set_robust_list(0x55555671f660, 24 [pid 594] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 593] <... set_robust_list resumed>) = 0 [pid 594] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 591] <... close resumed>) = 0 [pid 593] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 593] setpgid(0, 0 [pid 592] <... write resumed>) = 1048576 [pid 593] <... setpgid resumed>) = 0 [pid 593] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 593] write(3, "1000", 4) = 4 [pid 593] close(3) = 0 [pid 593] write(1, "executing program\n", 18 [pid 591] chdir("./file0"executing program [pid 593] <... write resumed>) = 18 [pid 591] <... chdir resumed>) = 0 [pid 593] memfd_create("syzkaller", 0 [pid 591] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 595 [pid 591] <... open resumed>) = 3 [pid 592] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 593] <... memfd_create resumed>) = 3 [pid 593] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 594] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 591] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 592] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 591] <... mount resumed>) = 0 [pid 592] <... openat resumed>) = 4 [pid 592] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 592] ioctl(4, LOOP_CLR_FD) = 0 [pid 591] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 591] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 592] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 592] close(4) = 0 [pid 592] close(3 [pid 591] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 591] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 591] exit_group(0) = ? ./strace-static-x86_64: Process 595 attached [pid 595] set_robust_list(0x55555671f660, 24) = 0 [pid 595] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 595] setpgid(0, 0) = 0 [pid 595] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 595] write(3, "1000", 4) = 4 [pid 595] close(3 [pid 592] <... close resumed>) = 0 [pid 592] chdir("./file0") = 0 [pid 595] <... close resumed>) = 0 [pid 592] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 595] write(1, "executing program\n", 18executing program [pid 591] +++ exited with 0 +++ [pid 595] <... write resumed>) = 18 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=591, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 595] memfd_create("syzkaller", 0) = 3 [pid 595] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 592] <... open resumed>) = 3 [pid 592] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 595] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 596 [pid 592] <... mount resumed>) = 0 [pid 592] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 592] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 592] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 592] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 592] exit_group(0) = ? [pid 592] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=592, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 596 attached [pid 596] set_robust_list(0x55555671f660, 24) = 0 [pid 596] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 594] <... write resumed>) = 1048576 [pid 596] <... prctl resumed>) = 0 [pid 596] setpgid(0, 0) = 0 [pid 596] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 596] write(3, "1000", 4) = 4 [pid 596] close(3) = 0 [pid 596] write(1, "executing program\n", 18executing program ) = 18 [pid 596] memfd_create("syzkaller", 0) = 3 [pid 596] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 595] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 597 [pid 593] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 594] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 594] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 594] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 594] ioctl(4, LOOP_CLR_FD) = 0 [pid 593] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 597 attached [pid 597] set_robust_list(0x55555671f660, 24) = 0 [pid 597] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 594] ioctl(4, LOOP_SET_FD, 3 [pid 597] <... prctl resumed>) = 0 [pid 597] setpgid(0, 0) = 0 [pid 594] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 594] close(4) = 0 [pid 594] close(3 [pid 597] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 executing program [pid 597] write(3, "1000", 4) = 4 [pid 597] close(3) = 0 [pid 597] write(1, "executing program\n", 18) = 18 [pid 597] memfd_create("syzkaller", 0) = 3 [pid 597] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 594] <... close resumed>) = 0 [pid 593] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 593] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 593] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 593] ioctl(4, LOOP_CLR_FD) = 0 [pid 594] chdir("./file0") = 0 [pid 594] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 594] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 593] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 593] close(4) = 0 [pid 593] close(3 [pid 594] <... mount resumed>) = 0 [pid 593] <... close resumed>) = 0 [pid 596] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 595] <... write resumed>) = 1048576 [pid 593] chdir("./file0") = 0 [pid 593] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 594] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 595] munmap(0x7f1ddd1fa000, 138412032 [pid 594] <... open resumed>) = 4 [pid 593] <... open resumed>) = 3 [pid 594] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 593] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 593] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 594] <... mmap resumed>) = 0x20000000 [pid 593] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 594] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 594] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 595] <... munmap resumed>) = 0 [pid 595] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 594] exit_group(0) = ? [pid 594] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=594, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 595] <... openat resumed>) = 4 [pid 595] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 595] ioctl(4, LOOP_CLR_FD) = 0 [pid 597] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 593] <... mmap resumed>) = 0x20000000 [pid 593] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 595] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 595] close(4) = 0 [pid 595] close(3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 598 [pid 593] <... openat resumed>) = 5 [pid 593] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 596] <... write resumed>) = 1048576 [pid 593] exit_group(0) = ? [pid 595] <... close resumed>) = 0 [pid 595] chdir("./file0" [pid 596] munmap(0x7f1ddd1fa000, 138412032 [pid 595] <... chdir resumed>) = 0 [pid 595] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 595] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 596] <... munmap resumed>) = 0 [pid 595] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 596] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 596] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 596] ioctl(4, LOOP_CLR_FD) = 0 [pid 595] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 593] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=593, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 596] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 596] close(4) = 0 [pid 595] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 596] close(3 [pid 595] <... openat resumed>) = 5 [pid 595] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 595] exit_group(0) = ? [pid 595] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=595, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 599 [pid 597] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 598 attached [pid 296] <... restart_syscall resumed>) = 0 [pid 598] set_robust_list(0x55555671f660, 24) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 598] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 600 [pid 598] setpgid(0, 0) = 0 [pid 598] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 598] write(3, "1000", 4) = 4 [pid 596] <... close resumed>) = 0 [pid 598] close(3 [pid 596] chdir("./file0") = 0 [pid 596] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 598] <... close resumed>) = 0 executing program [pid 598] write(1, "executing program\n", 18) = 18 [pid 596] <... open resumed>) = 3 [pid 597] munmap(0x7f1ddd1fa000, 138412032 [pid 598] memfd_create("syzkaller", 0 [pid 596] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 598] <... memfd_create resumed>) = 3 [pid 596] <... mount resumed>) = 0 [pid 597] <... munmap resumed>) = 0 [pid 596] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 597] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 596] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 597] <... openat resumed>) = 4 [pid 598] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 597] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 597] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 599 attached [pid 598] <... mmap resumed>) = 0x7f1ddd1fa000 executing program [pid 599] set_robust_list(0x55555671f660, 24) = 0 [pid 599] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 599] setpgid(0, 0 [pid 596] <... mmap resumed>) = 0x20000000 [pid 599] <... setpgid resumed>) = 0 [pid 599] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 597] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 597] close(4) = 0 [pid 597] close(3) = 0 [pid 596] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 599] <... openat resumed>) = 3 [pid 596] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 596] exit_group(0 [pid 599] write(3, "1000", 4) = 4 [pid 596] <... exit_group resumed>) = ? [pid 599] close(3) = 0 [pid 599] write(1, "executing program\n", 18) = 18 [pid 599] memfd_create("syzkaller", 0) = 3 [pid 599] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 598] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 600 attached [pid 600] set_robust_list(0x55555671f660, 24) = 0 [pid 600] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 596] +++ exited with 0 +++ [pid 600] <... prctl resumed>) = 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=596, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 600] setpgid(0, 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 600] <... setpgid resumed>) = 0 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 600] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 601 [pid 600] <... openat resumed>) = 3 [pid 597] chdir("./file0" [pid 600] write(3, "1000", 4 [pid 597] <... chdir resumed>) = 0 [pid 597] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 600] <... write resumed>) = 4 [pid 600] close(3 [pid 597] <... open resumed>) = 3 [pid 597] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 600] <... close resumed>) = 0 [pid 597] <... mount resumed>) = 0 [pid 597] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 600] write(1, "executing program\n", 18 [pid 597] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 600] <... write resumed>) = 18 [pid 600] memfd_create("syzkaller", 0./strace-static-x86_64: Process 601 attached [pid 601] set_robust_list(0x55555671f660, 24) = 0 [pid 600] <... memfd_create resumed>) = 3 [pid 600] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 601] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 600] <... mmap resumed>) = 0x7f1ddd1fa000 executing program [pid 597] <... mmap resumed>) = 0x20000000 [pid 601] <... prctl resumed>) = 0 [pid 601] setpgid(0, 0) = 0 [pid 601] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 601] write(3, "1000", 4) = 4 [pid 601] close(3) = 0 [pid 601] write(1, "executing program\n", 18) = 18 [pid 597] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 601] memfd_create("syzkaller", 0 [pid 597] <... openat resumed>) = 5 [pid 601] <... memfd_create resumed>) = 3 [pid 597] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 601] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 597] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 601] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 597] exit_group(0) = ? [pid 597] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=597, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 599] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 598] <... write resumed>) = 1048576 [pid 598] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 598] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 600] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 598] ioctl(4, LOOP_SET_FD, 3 [pid 299] <... restart_syscall resumed>) = 0 [pid 598] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 598] ioctl(4, LOOP_CLR_FD [pid 299] <... openat resumed>) = 3 [pid 598] <... ioctl resumed>) = 0 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 602 [pid 601] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 599] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 602 attached [pid 602] set_robust_list(0x55555671f660, 24) = 0 [pid 602] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 598] ioctl(4, LOOP_SET_FD, 3 [pid 599] munmap(0x7f1ddd1fa000, 138412032 [pid 598] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 602] <... prctl resumed>) = 0 [pid 602] setpgid(0, 0 [pid 599] <... munmap resumed>) = 0 [pid 598] close(4 [pid 602] <... setpgid resumed>) = 0 [pid 602] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 598] <... close resumed>) = 0 [pid 599] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 598] close(3 [pid 599] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 602] <... openat resumed>) = 3 [pid 599] ioctl(4, LOOP_CLR_FD) = 0 [pid 602] write(3, "1000", 4) = 4 [pid 602] close(3) = 0 executing program [pid 602] write(1, "executing program\n", 18) = 18 [pid 602] memfd_create("syzkaller", 0) = 3 [pid 602] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 598] <... close resumed>) = 0 [pid 599] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 599] close(4) = 0 [pid 599] close(3 [pid 598] chdir("./file0" [pid 600] <... write resumed>) = 1048576 [pid 598] <... chdir resumed>) = 0 [pid 598] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 600] munmap(0x7f1ddd1fa000, 138412032 [pid 598] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 598] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 600] <... munmap resumed>) = 0 [pid 598] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 601] <... write resumed>) = 1048576 [pid 599] <... close resumed>) = 0 [pid 601] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 601] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 599] chdir("./file0" [pid 598] <... mmap resumed>) = 0x20000000 [pid 600] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 599] <... chdir resumed>) = 0 [pid 601] ioctl(4, LOOP_SET_FD, 3 [pid 599] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 601] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 600] <... openat resumed>) = 4 [pid 598] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 601] ioctl(4, LOOP_CLR_FD) = 0 [pid 600] ioctl(4, LOOP_SET_FD, 3 [pid 598] <... openat resumed>) = 5 [pid 599] <... open resumed>) = 3 [pid 599] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 600] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 598] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 599] <... mount resumed>) = 0 [pid 600] ioctl(4, LOOP_CLR_FD [pid 599] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 600] <... ioctl resumed>) = 0 [pid 598] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 598] exit_group(0 [pid 601] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 601] close(4 [pid 598] <... exit_group resumed>) = ? [pid 601] <... close resumed>) = 0 [pid 601] close(3 [pid 598] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=598, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 599] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 600] ioctl(4, LOOP_SET_FD, 3 [pid 295] <... restart_syscall resumed>) = 0 [pid 600] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 600] close(4 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 600] <... close resumed>) = 0 [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 600] close(3 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 603 [pid 601] <... close resumed>) = 0 [pid 600] <... close resumed>) = 0 [pid 600] chdir("./file0") = 0 [pid 600] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 599] <... mmap resumed>) = 0x20000000 [pid 600] <... open resumed>) = 3 [pid 599] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 600] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 600] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 599] <... openat resumed>) = 5 [pid 599] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 600] <... open resumed>) = 4 [pid 599] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 599] exit_group(0) = ? [pid 600] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 602] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 599] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=599, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 601] chdir("./file0") = 0 [pid 601] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 601] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 601] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 601] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 604 [pid 601] <... mmap resumed>) = 0x20000000 [pid 602] <... write resumed>) = 1048576 [pid 601] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 601] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 601] exit_group(0) = ? [pid 601] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=601, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 604 attached [pid 604] set_robust_list(0x55555671f660, 24) = 0 [pid 604] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 600] <... mmap resumed>) = 0x20000000 [pid 604] setpgid(0, 0) = 0 [pid 600] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 603 attached [pid 604] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 600] <... openat resumed>) = 5 [pid 603] set_robust_list(0x55555671f660, 24 [pid 604] <... openat resumed>) = 3 [pid 603] <... set_robust_list resumed>) = 0 [pid 600] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 603] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 604] write(3, "1000", 4) = 4 [pid 604] close(3) = 0 [pid 604] write(1, "executing program\n", 18executing program ) = 18 [pid 604] memfd_create("syzkaller", 0 [pid 600] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 603] <... prctl resumed>) = 0 [pid 604] <... memfd_create resumed>) = 3 [pid 604] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 600] exit_group(0 [pid 603] setpgid(0, 0 [pid 600] <... exit_group resumed>) = ? [pid 603] <... setpgid resumed>) = 0 [pid 602] munmap(0x7f1ddd1fa000, 138412032 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 603] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 600] +++ exited with 0 +++ [pid 603] <... openat resumed>) = 3 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 605 [pid 603] write(3, "1000", 4 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=600, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 603] <... write resumed>) = 4 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 603] close(3 [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 603] <... close resumed>) = 0 [pid 603] write(1, "executing program\n", 18executing program ) = 18 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 606 [pid 603] memfd_create("syzkaller", 0) = 3 [pid 603] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 602] <... munmap resumed>) = 0 [pid 602] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 602] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 602] ioctl(4, LOOP_CLR_FD) = 0 [pid 602] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 602] close(4) = 0 [pid 602] close(3 [pid 603] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 605 attached [pid 605] set_robust_list(0x55555671f660, 24) = 0 [pid 605] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 605] setpgid(0, 0) = 0 [pid 605] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 602] <... close resumed>) = 0 [pid 605] write(3, "1000", 4) = 4 [pid 605] close(3) = 0 executing program [pid 605] write(1, "executing program\n", 18) = 18 [pid 605] memfd_create("syzkaller", 0) = 3 [pid 605] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 602] chdir("./file0") = 0 [pid 602] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 602] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 603] <... write resumed>) = 1048576 [pid 602] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 602] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 606 attached [pid 606] set_robust_list(0x55555671f660, 24) = 0 [pid 606] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 602] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 606] <... prctl resumed>) = 0 [pid 606] setpgid(0, 0 [pid 602] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 606] <... setpgid resumed>) = 0 [pid 602] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 602] exit_group(0) = ? [pid 606] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 602] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=602, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 606] write(3, "1000", 4 [pid 603] munmap(0x7f1ddd1fa000, 138412032 [pid 606] <... write resumed>) = 4 [pid 603] <... munmap resumed>) = 0 [pid 606] close(3 [pid 603] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 606] <... close resumed>) = 0 executing program [pid 606] write(1, "executing program\n", 18 [pid 603] <... openat resumed>) = 4 [pid 606] <... write resumed>) = 18 [pid 606] memfd_create("syzkaller", 0 [pid 603] ioctl(4, LOOP_SET_FD, 3 [pid 606] <... memfd_create resumed>) = 3 [pid 603] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 606] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 603] ioctl(4, LOOP_CLR_FD [pid 606] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 603] <... ioctl resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 607 [pid 604] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 606] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 605] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 603] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 603] close(4) = 0 [pid 603] close(3./strace-static-x86_64: Process 607 attached [pid 607] set_robust_list(0x55555671f660, 24 [pid 604] <... write resumed>) = 1048576 [pid 607] <... set_robust_list resumed>) = 0 [pid 607] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 607] setpgid(0, 0) = 0 [pid 607] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 603] <... close resumed>) = 0 [pid 607] <... openat resumed>) = 3 [pid 607] write(3, "1000", 4) = 4 [pid 607] close(3) = 0 [pid 607] write(1, "executing program\n", 18executing program [pid 603] chdir("./file0" [pid 607] <... write resumed>) = 18 [pid 607] memfd_create("syzkaller", 0 [pid 603] <... chdir resumed>) = 0 [pid 607] <... memfd_create resumed>) = 3 [pid 604] munmap(0x7f1ddd1fa000, 138412032 [pid 607] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 603] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 607] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 603] <... open resumed>) = 3 [pid 604] <... munmap resumed>) = 0 [pid 603] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 603] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 604] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 603] <... open resumed>) = 4 [pid 604] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 604] ioctl(4, LOOP_CLR_FD) = 0 [pid 604] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 604] close(4) = 0 [pid 604] close(3 [pid 603] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 603] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 603] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 603] exit_group(0) = ? [pid 605] <... write resumed>) = 1048576 [pid 604] <... close resumed>) = 0 [pid 605] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 605] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 605] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 605] ioctl(4, LOOP_CLR_FD) = 0 [pid 603] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=603, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 605] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 605] close(4) = 0 [pid 605] close(3) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 609 [pid 606] <... write resumed>) = 1048576 [pid 604] chdir("./file0" [pid 606] munmap(0x7f1ddd1fa000, 138412032 [pid 604] <... chdir resumed>) = 0 [pid 604] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 606] <... munmap resumed>) = 0 [pid 604] <... open resumed>) = 3 [pid 606] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 604] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 606] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 606] ioctl(4, LOOP_CLR_FD [pid 604] <... mount resumed>) = 0 [pid 606] <... ioctl resumed>) = 0 [pid 604] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 ./strace-static-x86_64: Process 609 attached [pid 606] ioctl(4, LOOP_SET_FD, 3 [pid 604] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 606] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 609] set_robust_list(0x55555671f660, 24) = 0 [pid 606] close(4) = 0 [pid 606] close(3 [pid 604] <... mmap resumed>) = 0x20000000 [pid 604] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 604] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 604] exit_group(0) = ? [pid 604] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=604, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 606] <... close resumed>) = 0 [pid 605] chdir("./file0") = 0 [pid 605] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 609] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 606] chdir("./file0" [pid 605] <... open resumed>) = 3 [pid 609] setpgid(0, 0) = 0 [pid 606] <... chdir resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 609] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 606] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 609] <... openat resumed>) = 3 [pid 606] <... open resumed>) = 3 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 610 [pid 605] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 607] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 605] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 605] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 605] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 605] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 605] exit_group(0) = ? [pid 605] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=605, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 607] <... write resumed>) = 1048576 [pid 607] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 607] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 607] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 607] ioctl(4, LOOP_CLR_FD) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 607] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 607] close(4) = 0 [pid 607] close(3./strace-static-x86_64: Process 610 attached [pid 609] write(3, "1000", 4 [pid 607] <... close resumed>) = 0 [pid 606] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 611 [pid 607] chdir("./file0") = 0 [pid 609] <... write resumed>) = 4 [pid 606] <... mount resumed>) = 0 [pid 607] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 610] set_robust_list(0x55555671f660, 24 [pid 609] close(3 [pid 607] <... open resumed>) = 3 [pid 606] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 607] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 610] <... set_robust_list resumed>) = 0 [pid 609] <... close resumed>) = 0 [pid 607] <... mount resumed>) = 0 [pid 606] <... open resumed>) = 4 [pid 607] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 607] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 610] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 609] write(1, "executing program\n", 18 [pid 606] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 609] <... write resumed>) = 18 [pid 607] <... mmap resumed>) = 0x20000000 [pid 607] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 606] <... mmap resumed>) = 0x20000000 [pid 609] memfd_create("syzkaller", 0 [pid 607] <... openat resumed>) = 5 [pid 607] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 607] exit_group(0) = ? [pid 610] <... prctl resumed>) = 0 [pid 609] <... memfd_create resumed>) = 3 [pid 607] +++ exited with 0 +++ [pid 606] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=607, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 611 attached [pid 611] set_robust_list(0x55555671f660, 24) = 0 [pid 609] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 606] <... openat resumed>) = 5 [pid 610] setpgid(0, 0 [pid 611] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 611] setpgid(0, 0) = 0 [pid 609] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 606] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 610] <... setpgid resumed>) = 0 [pid 611] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program ) = 3 [pid 611] write(3, "1000", 4) = 4 [pid 611] close(3) = 0 [pid 611] write(1, "executing program\n", 18) = 18 [pid 611] memfd_create("syzkaller", 0) = 3 [pid 611] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 609] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 606] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 299] <... restart_syscall resumed>) = 0 [pid 606] exit_group(0) = ? [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 610] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 612 [pid 606] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=606, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 610] <... openat resumed>) = 3 executing program [pid 610] write(3, "1000", 4) = 4 [pid 610] close(3) = 0 [pid 610] write(1, "executing program\n", 18) = 18 [pid 610] memfd_create("syzkaller", 0) = 3 [pid 611] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 610] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 613 ./strace-static-x86_64: Process 612 attached [pid 612] set_robust_list(0x55555671f660, 24) = 0 [pid 612] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 612] setpgid(0, 0) = 0 [pid 612] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 611] <... write resumed>) = 1048576 [pid 610] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 612] <... openat resumed>) = 3 [pid 612] write(3, "1000", 4) = 4 [pid 612] close(3) = 0 executing program [pid 612] write(1, "executing program\n", 18) = 18 [pid 612] memfd_create("syzkaller", 0) = 3 [pid 612] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 611] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 611] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 611] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 611] ioctl(4, LOOP_CLR_FD) = 0 [pid 609] <... write resumed>) = 1048576 [pid 611] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 611] close(4) = 0 [pid 611] close(3./strace-static-x86_64: Process 613 attached [pid 613] set_robust_list(0x55555671f660, 24) = 0 [pid 613] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 613] setpgid(0, 0) = 0 [pid 613] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 611] <... close resumed>) = 0 [pid 613] write(3, "1000", 4) = 4 [pid 613] close(3) = 0 [pid 613] write(1, "executing program\n", 18executing program ) = 18 [pid 613] memfd_create("syzkaller", 0) = 3 [pid 613] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 611] chdir("./file0") = 0 [pid 611] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 609] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 609] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 611] <... open resumed>) = 3 [pid 611] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 609] <... openat resumed>) = 4 [pid 609] ioctl(4, LOOP_SET_FD, 3 [pid 611] <... mount resumed>) = 0 [pid 609] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 611] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 609] ioctl(4, LOOP_CLR_FD) = 0 [pid 611] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 611] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 611] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 611] exit_group(0 [pid 610] <... write resumed>) = 1048576 [pid 611] <... exit_group resumed>) = ? [pid 610] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 610] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 610] ioctl(4, LOOP_SET_FD, 3 [pid 609] ioctl(4, LOOP_SET_FD, 3 [pid 610] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 609] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 610] ioctl(4, LOOP_CLR_FD) = 0 [pid 609] close(4 [pid 611] +++ exited with 0 +++ [pid 609] <... close resumed>) = 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=611, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 609] close(3 [pid 612] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 609] <... close resumed>) = 0 [pid 609] chdir("./file0") = 0 [pid 610] ioctl(4, LOOP_SET_FD, 3 [pid 609] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 610] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 609] <... open resumed>) = 3 [pid 610] close(4) = 0 [pid 609] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 610] close(3 [pid 609] <... mount resumed>) = 0 [pid 613] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 614 [pid 610] <... close resumed>) = 0 [pid 609] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 609] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 609] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 610] chdir("./file0" [pid 609] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 610] <... chdir resumed>) = 0 [pid 609] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 609] exit_group(0 [pid 610] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 609] <... exit_group resumed>) = ? [pid 609] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=609, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 612] <... write resumed>) = 1048576 [pid 612] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 612] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 612] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 612] ioctl(4, LOOP_CLR_FD) = 0 [pid 613] <... write resumed>) = 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 615 [pid 612] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 612] close(4) = 0 [pid 612] close(3) = 0 ./strace-static-x86_64: Process 614 attached [pid 614] set_robust_list(0x55555671f660, 24) = 0 [pid 614] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 614] setpgid(0, 0) = 0 [pid 614] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 614] write(3, "1000", 4) = 4 [pid 614] close(3) = 0 [pid 614] write(1, "executing program\n", 18executing program ) = 18 [pid 610] <... open resumed>) = 3 [pid 614] memfd_create("syzkaller", 0 [pid 610] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 615 attached [pid 613] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 610] <... mount resumed>) = 0 [pid 614] <... memfd_create resumed>) = 3 [pid 610] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 614] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 610] <... open resumed>) = 4 [pid 615] set_robust_list(0x55555671f660, 24 [pid 610] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 615] <... set_robust_list resumed>) = 0 [pid 613] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 613] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 610] <... mmap resumed>) = 0x20000000 [pid 613] ioctl(4, LOOP_CLR_FD [pid 615] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 610] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 613] <... ioctl resumed>) = 0 [pid 612] chdir("./file0") = 0 [pid 612] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 615] <... prctl resumed>) = 0 [pid 610] <... openat resumed>) = 5 [pid 612] <... open resumed>) = 3 [pid 612] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 610] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 615] setpgid(0, 0 [pid 613] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 613] close(4) = 0 [pid 613] close(3 [pid 615] <... setpgid resumed>) = 0 [pid 610] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 610] exit_group(0 [pid 615] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 610] <... exit_group resumed>) = ? [pid 610] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=610, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 615] <... openat resumed>) = 3 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 615] write(3, "1000", 4) = 4 [pid 612] <... mount resumed>) = 0 [pid 612] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 615] close(3) = 0 [pid 615] write(1, "executing program\n", 18executing program ) = 18 [pid 612] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 615] memfd_create("syzkaller", 0) = 3 [pid 615] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 612] <... mmap resumed>) = 0x20000000 [pid 613] <... close resumed>) = 0 [pid 612] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 612] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 612] exit_group(0) = ? [pid 612] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=612, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 615] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 613] chdir("./file0") = 0 [pid 613] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 616 [pid 613] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 613] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 613] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 613] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 613] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 613] exit_group(0) = ? [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 617 [pid 613] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=613, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 614] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 616 attached [pid 616] set_robust_list(0x55555671f660, 24) = 0 [pid 616] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 616] setpgid(0, 0) = 0 [pid 616] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 616] write(3, "1000", 4) = 4 [pid 616] close(3) = 0 executing program [pid 616] write(1, "executing program\n", 18) = 18 [pid 616] memfd_create("syzkaller", 0) = 3 [pid 616] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 615] <... write resumed>) = 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 615] munmap(0x7f1ddd1fa000, 138412032 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 615] <... munmap resumed>) = 0 [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 615] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 615] <... openat resumed>) = 4 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 618 [pid 615] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 617 attached ) = -1 EBUSY (Device or resource busy) [pid 617] set_robust_list(0x55555671f660, 24 [pid 615] ioctl(4, LOOP_CLR_FD [pid 617] <... set_robust_list resumed>) = 0 [pid 615] <... ioctl resumed>) = 0 [pid 617] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 617] setpgid(0, 0 [pid 614] <... write resumed>) = 1048576 [pid 617] <... setpgid resumed>) = 0 [pid 615] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 617] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 618 attached [pid 618] set_robust_list(0x55555671f660, 24) = 0 [pid 615] close(4 [pid 617] <... openat resumed>) = 3 [pid 618] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 615] <... close resumed>) = 0 [pid 617] write(3, "1000", 4 [pid 615] close(3executing program [pid 618] setpgid(0, 0) = 0 [pid 618] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 618] write(3, "1000", 4) = 4 [pid 618] close(3) = 0 [pid 618] write(1, "executing program\n", 18) = 18 [pid 618] memfd_create("syzkaller", 0) = 3 [pid 618] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 615] <... close resumed>) = 0 [pid 614] munmap(0x7f1ddd1fa000, 138412032 [pid 617] <... write resumed>) = 4 [pid 615] chdir("./file0" [pid 617] close(3 [pid 615] <... chdir resumed>) = 0 [pid 617] <... close resumed>) = 0 [pid 614] <... munmap resumed>) = 0 [pid 615] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 614] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 614] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 614] ioctl(4, LOOP_CLR_FD) = 0 executing program [pid 617] write(1, "executing program\n", 18 [pid 615] <... open resumed>) = 3 [pid 617] <... write resumed>) = 18 [pid 617] memfd_create("syzkaller", 0 [pid 615] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 617] <... memfd_create resumed>) = 3 [pid 615] <... mount resumed>) = 0 [pid 614] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 614] close(4 [pid 617] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 615] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 617] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 614] <... close resumed>) = 0 [pid 614] close(3) = 0 [pid 616] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 615] <... open resumed>) = 4 [pid 618] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 614] chdir("./file0") = 0 [pid 614] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 614] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 614] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 614] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 614] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 614] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 614] exit_group(0) = ? [pid 615] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 614] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=614, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 616] <... write resumed>) = 1048576 [pid 615] <... mmap resumed>) = 0x20000000 [pid 616] munmap(0x7f1ddd1fa000, 138412032 [pid 615] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 616] <... munmap resumed>) = 0 [pid 616] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 615] <... openat resumed>) = 5 [pid 615] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 616] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 616] ioctl(4, LOOP_CLR_FD) = 0 [pid 615] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 617] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 616] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 616] close(4) = 0 [pid 616] close(3 [pid 615] exit_group(0) = ? [pid 615] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=615, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 618] <... write resumed>) = 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 617] <... write resumed>) = 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 617] munmap(0x7f1ddd1fa000, 138412032 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 619 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 617] <... munmap resumed>) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 620 [pid 617] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 617] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 617] ioctl(4, LOOP_CLR_FD) = 0 [pid 616] <... close resumed>) = 0 [pid 616] chdir("./file0") = 0 [pid 616] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 616] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 616] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 617] ioctl(4, LOOP_SET_FD, 3 [pid 616] <... open resumed>) = 4 [pid 616] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 617] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 617] close(4) = 0 [pid 617] close(3 [pid 616] <... mmap resumed>) = 0x20000000 [pid 618] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 618] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 618] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 618] ioctl(4, LOOP_CLR_FD) = 0 [pid 616] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 616] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 616] exit_group(0./strace-static-x86_64: Process 620 attached [pid 620] set_robust_list(0x55555671f660, 24 [pid 616] <... exit_group resumed>) = ? [pid 617] <... close resumed>) = 0 [pid 618] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 618] close(4) = 0 [pid 618] close(3 [pid 617] chdir("./file0") = 0 [pid 617] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 617] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 620] <... set_robust_list resumed>) = 0 [pid 617] <... mount resumed>) = 0 [pid 620] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 620] setpgid(0, 0) = 0 [pid 617] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 620] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 617] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 620] <... openat resumed>) = 3 [pid 617] <... mmap resumed>) = 0x20000000 [pid 620] write(3, "1000", 4 [pid 617] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 620] <... write resumed>) = 4 [pid 617] <... openat resumed>) = 5 executing program [pid 620] close(3) = 0 [pid 620] write(1, "executing program\n", 18) = 18 [pid 617] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 620] memfd_create("syzkaller", 0 [pid 616] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=616, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 620] <... memfd_create resumed>) = 3 [pid 620] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 618] <... close resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 619 attached [pid 617] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 621 [pid 619] set_robust_list(0x55555671f660, 24 [pid 618] chdir("./file0" [pid 619] <... set_robust_list resumed>) = 0 [pid 617] exit_group(0 [pid 619] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 617] <... exit_group resumed>) = ? [pid 618] <... chdir resumed>) = 0 [pid 618] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 618] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 617] +++ exited with 0 +++ [pid 619] <... prctl resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=617, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 618] <... mount resumed>) = 0 [pid 619] setpgid(0, 0 [pid 618] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 619] <... setpgid resumed>) = 0 [pid 618] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 619] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 619] <... openat resumed>) = 3 [pid 299] <... openat resumed>) = 3 [pid 619] write(3, "1000", 4 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 619] <... write resumed>) = 4 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 619] close(3 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 622 [pid 619] <... close resumed>) = 0 executing program [pid 619] write(1, "executing program\n", 18) = 18 [pid 619] memfd_create("syzkaller", 0) = 3 [pid 619] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 618] <... mmap resumed>) = 0x20000000 [pid 618] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000executing program ) = 5 [pid 618] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 618] exit_group(0) = ? [pid 618] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=618, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 622 attached [pid 622] set_robust_list(0x55555671f660, 24) = 0 [pid 622] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 622] setpgid(0, 0) = 0 [pid 622] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 622] write(3, "1000", 4) = 4 [pid 622] close(3) = 0 [pid 622] write(1, "executing program\n", 18) = 18 [pid 622] memfd_create("syzkaller", 0) = 3 [pid 622] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 623 [pid 619] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 620] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576executing program ) = 1048576 ./strace-static-x86_64: Process 623 attached [pid 623] set_robust_list(0x55555671f660, 24) = 0 [pid 623] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 623] setpgid(0, 0) = 0 [pid 623] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 623] write(3, "1000", 4) = 4 [pid 623] close(3) = 0 [pid 623] write(1, "executing program\n", 18) = 18 [pid 623] memfd_create("syzkaller", 0./strace-static-x86_64: Process 621 attached [pid 621] set_robust_list(0x55555671f660, 24) = 0 [pid 623] <... memfd_create resumed>) = 3 [pid 623] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 621] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 621] setpgid(0, 0) = 0 [pid 621] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 621] write(3, "1000", 4) = 4 [pid 620] munmap(0x7f1ddd1fa000, 138412032 [pid 621] close(3) = 0 [pid 621] write(1, "executing program\n", 18executing program ) = 18 [pid 621] memfd_create("syzkaller", 0 [pid 620] <... munmap resumed>) = 0 [pid 620] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 620] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 620] ioctl(4, LOOP_CLR_FD) = 0 [pid 621] <... memfd_create resumed>) = 3 [pid 621] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 622] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 620] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 620] close(4) = 0 [pid 620] close(3 [pid 619] <... write resumed>) = 1048576 [pid 620] <... close resumed>) = 0 [pid 621] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 619] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 619] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 619] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 619] ioctl(4, LOOP_CLR_FD) = 0 [pid 619] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 619] close(4) = 0 [pid 619] close(3) = 0 [pid 620] chdir("./file0") = 0 [pid 620] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 620] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 621] <... write resumed>) = 1048576 [pid 619] chdir("./file0") = 0 [pid 619] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 620] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 619] <... open resumed>) = 3 [pid 620] <... open resumed>) = 4 [pid 620] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 620] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 621] munmap(0x7f1ddd1fa000, 138412032 [pid 619] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 619] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 620] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 619] <... open resumed>) = 4 [pid 619] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 620] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 620] exit_group(0 [pid 619] <... mmap resumed>) = 0x20000000 [pid 619] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 619] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 621] <... munmap resumed>) = 0 [pid 619] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 619] exit_group(0 [pid 621] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 619] <... exit_group resumed>) = ? [pid 620] <... exit_group resumed>) = ? [pid 619] +++ exited with 0 +++ [pid 621] <... openat resumed>) = 4 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=619, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 624 [pid 623] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 622] <... write resumed>) = 1048576 [pid 622] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 620] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=620, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 623] <... write resumed>) = 1048576 [pid 622] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 622] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 622] ioctl(4, LOOP_CLR_FD) = 0 [pid 623] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 623] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 621] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 624 attached ) = -1 EBUSY (Device or resource busy) [pid 624] set_robust_list(0x55555671f660, 24 [pid 621] ioctl(4, LOOP_CLR_FD [pid 624] <... set_robust_list resumed>) = 0 [pid 621] <... ioctl resumed>) = 0 [pid 624] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 297] <... restart_syscall resumed>) = 0 [pid 624] <... prctl resumed>) = 0 [pid 624] setpgid(0, 0) = 0 [pid 624] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program ) = 3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 624] write(3, "1000", 4) = 4 [pid 624] close(3 [pid 621] ioctl(4, LOOP_SET_FD, 3 [pid 624] <... close resumed>) = 0 [pid 621] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 624] write(1, "executing program\n", 18 [pid 621] close(4 [pid 624] <... write resumed>) = 18 [pid 621] <... close resumed>) = 0 [pid 624] memfd_create("syzkaller", 0 [pid 621] close(3 [pid 297] <... openat resumed>) = 3 [pid 624] <... memfd_create resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 625 [pid 622] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 622] close(4) = 0 [pid 622] close(3 [pid 624] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 621] <... close resumed>) = 0 [pid 624] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 621] chdir("./file0") = 0 [pid 622] <... close resumed>) = 0 [pid 622] chdir("./file0") = 0 [pid 622] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 622] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 622] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 621] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 622] <... open resumed>) = 4 [pid 621] <... open resumed>) = 3 [pid 621] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 621] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 621] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 622] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 621] <... mmap resumed>) = 0x20000000 [pid 621] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 621] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 621] exit_group(0) = ? [pid 621] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=621, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 623] <... openat resumed>) = 4 [pid 623] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 623] ioctl(4, LOOP_CLR_FD) = 0 [pid 624] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 622] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 625 attached [pid 625] set_robust_list(0x55555671f660, 24) = 0 [pid 623] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 623] close(4) = 0 [pid 623] close(3 [pid 624] <... write resumed>) = 1048576 [pid 622] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 623] <... close resumed>) = 0 [pid 623] chdir("./file0") = 0 [pid 623] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 625] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 626 [pid 625] setpgid(0, 0) = 0 [pid 625] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 623] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 625] <... openat resumed>) = 3 [pid 623] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 625] write(3, "1000", 4 [pid 623] <... open resumed>) = 4 [pid 625] <... write resumed>) = 4 [pid 625] close(3 [pid 624] munmap(0x7f1ddd1fa000, 138412032 [pid 622] <... openat resumed>) = 5 [pid 625] <... close resumed>) = 0 [pid 624] <... munmap resumed>) = 0 [pid 622] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 624] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 622] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 624] <... openat resumed>) = 4 [pid 622] exit_group(0 [pid 624] ioctl(4, LOOP_SET_FD, 3 [pid 622] <... exit_group resumed>) = ? [pid 624] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program [pid 625] write(1, "executing program\n", 18) = 18 [pid 625] memfd_create("syzkaller", 0 [pid 623] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 622] +++ exited with 0 +++ [pid 624] ioctl(4, LOOP_CLR_FD) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=622, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 625] <... memfd_create resumed>) = 3 [pid 625] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 623] <... mmap resumed>) = 0x20000000 [pid 624] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 624] close(4) = 0 [pid 624] close(3 [pid 625] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 624] <... close resumed>) = 0 [pid 624] chdir("./file0") = 0 [pid 624] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 624] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 299] <... restart_syscall resumed>) = 0 [pid 624] <... mount resumed>) = 0 [pid 624] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 624] <... open resumed>) = 4 [pid 299] <... openat resumed>) = 3 [pid 624] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 627 [pid 624] <... mmap resumed>) = 0x20000000 [pid 624] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 624] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 623] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 624] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 624] exit_group(0 [pid 623] <... openat resumed>) = 5 [pid 624] <... exit_group resumed>) = ? [pid 623] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 623] exit_group(0) = ? [pid 624] +++ exited with 0 +++ [pid 623] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=623, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=624, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 295] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 626 attached [pid 626] set_robust_list(0x55555671f660, 24) = 0 [pid 626] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 626] setpgid(0, 0) = 0 [pid 626] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 625] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 626] <... openat resumed>) = 3 [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] <... openat resumed>) = 3 [pid 296] <... ioctl resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 296] close(3 [pid 295] <... ioctl resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 295] close(3 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 628 attached ./strace-static-x86_64: Process 627 attached [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 628 [pid 628] set_robust_list(0x55555671f660, 24 [pid 627] set_robust_list(0x55555671f660, 24 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 629 [pid 628] <... set_robust_list resumed>) = 0 [pid 627] <... set_robust_list resumed>) = 0 [pid 628] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 627] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 628] setpgid(0, 0 [pid 627] <... prctl resumed>) = 0 [pid 628] <... setpgid resumed>) = 0 [pid 627] setpgid(0, 0 [pid 626] write(3, "1000", 4 [pid 627] <... setpgid resumed>) = 0 [pid 626] <... write resumed>) = 4 [pid 628] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 627] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 626] close(3executing program executing program [pid 628] <... openat resumed>) = 3 [pid 627] <... openat resumed>) = 3 [pid 626] <... close resumed>) = 0 [pid 628] write(3, "1000", 4 [pid 627] write(3, "1000", 4 [pid 628] <... write resumed>) = 4 [pid 627] <... write resumed>) = 4 [pid 628] close(3 [pid 627] close(3 [pid 628] <... close resumed>) = 0 [pid 627] <... close resumed>) = 0 [pid 628] write(1, "executing program\n", 18 [pid 627] write(1, "executing program\n", 18 [pid 628] <... write resumed>) = 18 [pid 627] <... write resumed>) = 18 executing program [pid 628] memfd_create("syzkaller", 0 [pid 627] memfd_create("syzkaller", 0 [pid 626] write(1, "executing program\n", 18 [pid 628] <... memfd_create resumed>) = 3 [pid 627] <... memfd_create resumed>) = 3 [pid 628] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 627] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 628] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 627] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 626] <... write resumed>) = 18 [pid 626] memfd_create("syzkaller", 0) = 3 [pid 626] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 627] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 626] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 625] <... write resumed>) = 1048576 [pid 628] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 626] <... write resumed>) = 1048576 [pid 625] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 625] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 ./strace-static-x86_64: Process 629 attached [pid 625] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 625] ioctl(4, LOOP_CLR_FD) = 0 [pid 626] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 626] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 626] ioctl(4, LOOP_SET_FD, 3 [pid 625] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 629] set_robust_list(0x55555671f660, 24 [pid 627] <... write resumed>) = 1048576 [pid 629] <... set_robust_list resumed>) = 0 [pid 629] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 629] setpgid(0, 0) = 0 [pid 629] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 625] close(4 [pid 629] <... openat resumed>) = 3 [pid 629] write(3, "1000", 4) = 4 [pid 629] close(3) = 0 executing program [pid 629] write(1, "executing program\n", 18) = 18 [pid 629] memfd_create("syzkaller", 0) = 3 [pid 629] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 627] munmap(0x7f1ddd1fa000, 138412032 [pid 625] <... close resumed>) = 0 [pid 625] close(3) = 0 [pid 625] chdir("./file0") = 0 [pid 625] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 627] <... munmap resumed>) = 0 [pid 625] <... open resumed>) = 3 [pid 626] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 626] ioctl(4, LOOP_CLR_FD) = 0 [pid 625] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 625] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 626] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 626] close(4) = 0 [pid 626] close(3) = 0 [pid 625] <... open resumed>) = 4 [pid 625] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 625] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 625] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 625] exit_group(0) = ? [pid 625] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=625, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 626] chdir("./file0") = 0 [pid 626] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3 [pid 629] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 630 [pid 626] <... open resumed>) = 3 [pid 626] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 626] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 628] <... write resumed>) = 1048576 [pid 627] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 628] munmap(0x7f1ddd1fa000, 138412032 [pid 627] <... openat resumed>) = 4 [pid 627] ioctl(4, LOOP_SET_FD, 3 [pid 628] <... munmap resumed>) = 0 [pid 627] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 628] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 627] ioctl(4, LOOP_CLR_FD [pid 628] <... openat resumed>) = 4 [pid 627] <... ioctl resumed>) = 0 [pid 628] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 626] <... open resumed>) = 4 [pid 626] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 628] ioctl(4, LOOP_CLR_FD [pid 627] ioctl(4, LOOP_SET_FD, 3 [pid 628] <... ioctl resumed>) = 0 [pid 627] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 627] close(4) = 0 [pid 627] close(3 [pid 626] <... mmap resumed>) = 0x20000000 [pid 626] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 626] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 626] exit_group(0) = ? [pid 627] <... close resumed>) = 0 [pid 628] ioctl(4, LOOP_SET_FD, 3 [pid 627] chdir("./file0" [pid 628] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 628] close(4 [pid 627] <... chdir resumed>) = 0 [pid 628] <... close resumed>) = 0 [pid 628] close(3 [pid 627] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 626] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=626, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 630 attached [pid 630] set_robust_list(0x55555671f660, 24) = 0 [pid 630] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 628] <... close resumed>) = 0 [pid 627] <... open resumed>) = 3 [pid 628] chdir("./file0" [pid 630] <... prctl resumed>) = 0 [pid 630] setpgid(0, 0) = 0 [pid 629] <... write resumed>) = 1048576 [pid 627] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 629] munmap(0x7f1ddd1fa000, 138412032 [pid 628] <... chdir resumed>) = 0 [pid 628] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 627] <... mount resumed>) = 0 [pid 629] <... munmap resumed>) = 0 [pid 627] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 630] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 628] <... open resumed>) = 3 [pid 629] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 628] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 627] <... open resumed>) = 4 [pid 627] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 628] <... mount resumed>) = 0 [pid 629] <... openat resumed>) = 4 [pid 630] <... openat resumed>) = 3 [pid 630] write(3, "1000", 4) = 4 [pid 628] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 629] ioctl(4, LOOP_SET_FD, 3 [pid 627] <... mmap resumed>) = 0x20000000 [pid 628] <... open resumed>) = 4 [pid 627] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 629] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 628] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 627] <... openat resumed>) = 5 [pid 630] close(3) = 0 [pid 630] write(1, "executing program\n", 18 [pid 628] <... mmap resumed>) = 0x20000000 [pid 627] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 629] ioctl(4, LOOP_CLR_FD [pid 628] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 627] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 629] <... ioctl resumed>) = 0 executing program [pid 628] <... openat resumed>) = 5 [pid 627] exit_group(0 [pid 628] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 627] <... exit_group resumed>) = ? [pid 628] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 630] <... write resumed>) = 18 [pid 630] memfd_create("syzkaller", 0) = 3 [pid 630] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 627] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=627, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 628] exit_group(0 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 628] <... exit_group resumed>) = ? [pid 629] ioctl(4, LOOP_SET_FD, 3 [pid 630] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 628] +++ exited with 0 +++ [pid 629] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=628, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 629] close(4 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 629] <... close resumed>) = 0 [pid 629] close(3 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 631 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3 [pid 629] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 629] chdir("./file0" [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 629] <... chdir resumed>) = 0 [pid 629] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 632 [pid 299] <... restart_syscall resumed>) = 0 [pid 629] <... open resumed>) = 3 [pid 629] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 629] <... mount resumed>) = 0 [pid 299] ioctl(3, LOOP_CLR_FD [pid 629] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 299] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 629] <... open resumed>) = 4 [pid 299] <... close resumed>) = 0 [pid 629] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 633 [pid 629] <... mmap resumed>) = 0x20000000 [pid 630] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 633 attached [pid 633] set_robust_list(0x55555671f660, 24) = 0 [pid 633] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 633] setpgid(0, 0./strace-static-x86_64: Process 632 attached [pid 629] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 632] set_robust_list(0x55555671f660, 24 [pid 629] <... openat resumed>) = 5 [pid 632] <... set_robust_list resumed>) = 0 [pid 629] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 632] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 629] exit_group(0 [pid 632] setpgid(0, 0 [pid 629] <... exit_group resumed>) = ? [pid 633] <... setpgid resumed>) = 0 [pid 633] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 629] +++ exited with 0 +++ [pid 632] <... setpgid resumed>) = 0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=629, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 633] <... openat resumed>) = 3 [pid 633] write(3, "1000", 4./strace-static-x86_64: Process 631 attached ) = 4 [pid 633] close(3) = 0 [pid 631] set_robust_list(0x55555671f660, 24 [pid 633] write(1, "executing program\n", 18executing program ) = 18 [pid 631] <... set_robust_list resumed>) = 0 [pid 631] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 633] memfd_create("syzkaller", 0 [pid 631] <... prctl resumed>) = 0 [pid 631] setpgid(0, 0 [pid 633] <... memfd_create resumed>) = 3 [pid 631] <... setpgid resumed>) = 0 [pid 633] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 631] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 633] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 632] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 632] write(3, "1000", 4) = 4 [pid 631] <... openat resumed>) = 3 [pid 632] close(3executing program executing program ) = 0 [pid 632] write(1, "executing program\n", 18 [pid 631] write(3, "1000", 4 [pid 632] <... write resumed>) = 18 [pid 631] <... write resumed>) = 4 [pid 631] close(3 [pid 632] memfd_create("syzkaller", 0 [pid 631] <... close resumed>) = 0 [pid 632] <... memfd_create resumed>) = 3 [pid 632] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 631] write(1, "executing program\n", 18 [pid 632] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 631] <... write resumed>) = 18 [pid 631] memfd_create("syzkaller", 0) = 3 [pid 631] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 634 [pid 632] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 630] <... write resumed>) = 1048576 [pid 633] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 631] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 632] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 634 attached [pid 634] set_robust_list(0x55555671f660, 24 [pid 632] munmap(0x7f1ddd1fa000, 138412032 [pid 630] munmap(0x7f1ddd1fa000, 138412032 [pid 634] <... set_robust_list resumed>) = 0 [pid 632] <... munmap resumed>) = 0 [pid 634] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 632] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 630] <... munmap resumed>) = 0 [pid 634] setpgid(0, 0 [pid 632] <... openat resumed>) = 4 [pid 630] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 634] <... setpgid resumed>) = 0 [pid 632] ioctl(4, LOOP_SET_FD, 3 [pid 630] <... openat resumed>) = 4 [pid 634] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 632] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 630] ioctl(4, LOOP_SET_FD, 3 [pid 634] <... openat resumed>) = 3 [pid 632] ioctl(4, LOOP_CLR_FD [pid 630] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 634] write(3, "1000", 4 [pid 632] <... ioctl resumed>) = 0 [pid 630] ioctl(4, LOOP_CLR_FD [pid 634] <... write resumed>) = 4 [pid 630] <... ioctl resumed>) = 0 [pid 634] close(3executing program ) = 0 [pid 634] write(1, "executing program\n", 18) = 18 [pid 634] memfd_create("syzkaller", 0) = 3 [pid 634] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 633] <... write resumed>) = 1048576 [pid 633] munmap(0x7f1ddd1fa000, 138412032 [pid 631] <... write resumed>) = 1048576 [pid 633] <... munmap resumed>) = 0 [pid 633] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 633] ioctl(4, LOOP_SET_FD, 3 [pid 631] munmap(0x7f1ddd1fa000, 138412032 [pid 633] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 631] <... munmap resumed>) = 0 [pid 633] ioctl(4, LOOP_CLR_FD [pid 634] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 632] ioctl(4, LOOP_SET_FD, 3 [pid 630] ioctl(4, LOOP_SET_FD, 3 [pid 632] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 630] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 632] close(4 [pid 630] close(4 [pid 632] <... close resumed>) = 0 [pid 630] <... close resumed>) = 0 [pid 632] close(3 [pid 630] close(3 [pid 633] <... ioctl resumed>) = 0 [pid 631] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 631] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 631] ioctl(4, LOOP_CLR_FD) = 0 [pid 633] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 633] close(4) = 0 [pid 633] close(3 [pid 630] <... close resumed>) = 0 [pid 631] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 632] <... close resumed>) = 0 [pid 630] chdir("./file0" [pid 631] close(4) = 0 [pid 631] close(3) = 0 [pid 633] <... close resumed>) = 0 [pid 633] chdir("./file0" [pid 632] chdir("./file0" [pid 630] <... chdir resumed>) = 0 [pid 630] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 632] <... chdir resumed>) = 0 [pid 633] <... chdir resumed>) = 0 [pid 633] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 631] chdir("./file0") = 0 [pid 631] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 633] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 633] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 631] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 633] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 631] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 631] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 633] <... mmap resumed>) = 0x20000000 [pid 633] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 631] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 633] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 631] <... openat resumed>) = 5 [pid 633] exit_group(0 [pid 631] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 633] <... exit_group resumed>) = ? [pid 631] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 631] exit_group(0) = ? [pid 632] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 630] <... open resumed>) = 3 [pid 631] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=631, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 633] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=633, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 634] <... write resumed>) = 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 632] <... open resumed>) = 3 [pid 634] munmap(0x7f1ddd1fa000, 138412032 [pid 630] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 632] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 630] <... mount resumed>) = 0 [pid 632] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 630] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 634] <... munmap resumed>) = 0 [pid 632] <... open resumed>) = 4 [pid 630] <... open resumed>) = 4 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 632] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 630] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 632] <... mmap resumed>) = 0x20000000 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 632] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 630] <... mmap resumed>) = 0x20000000 [pid 299] <... restart_syscall resumed>) = 0 [pid 634] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 632] <... openat resumed>) = 5 [pid 630] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 635 [pid 634] <... openat resumed>) = 4 [pid 632] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 630] <... openat resumed>) = 5 [pid 632] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 634] ioctl(4, LOOP_SET_FD, 3 [pid 630] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 632] exit_group(0 [pid 630] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 634] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 632] <... exit_group resumed>) = ? [pid 630] exit_group(0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 632] +++ exited with 0 +++ [pid 634] ioctl(4, LOOP_CLR_FD [pid 630] <... exit_group resumed>) = ? [pid 299] <... ioctl resumed>) = 0 [pid 299] close(3) = 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=632, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 634] <... ioctl resumed>) = 0 [pid 630] +++ exited with 0 +++ [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 636 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=630, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 635 attached [pid 635] set_robust_list(0x55555671f660, 24) = 0 [pid 635] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 635] setpgid(0, 0) = 0 [pid 635] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 635] write(3, "1000", 4) = 4 [pid 635] close(3) = 0 [pid 635] write(1, "executing program\n", 18executing program ) = 18 [pid 635] memfd_create("syzkaller", 0) = 3 [pid 635] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 634] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 636 attached ) = -1 EBUSY (Device or resource busy) [pid 634] close(4 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 637 [pid 636] set_robust_list(0x55555671f660, 24 [pid 634] <... close resumed>) = 0 [pid 634] close(3 [pid 636] <... set_robust_list resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 636] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 634] <... close resumed>) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 638 [pid 635] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 638 attached [pid 638] set_robust_list(0x55555671f660, 24) = 0 [pid 638] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 638] setpgid(0, 0) = 0 [pid 638] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 637 attached [pid 637] set_robust_list(0x55555671f660, 24 [pid 638] <... openat resumed>) = 3 [pid 637] <... set_robust_list resumed>) = 0 [pid 637] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 638] write(3, "1000", 4) = 4 [pid 638] close(3) = 0 [pid 637] <... prctl resumed>) = 0 [pid 638] write(1, "executing program\n", 18 [pid 637] setpgid(0, 0 [pid 636] <... prctl resumed>) = 0 [pid 634] chdir("./file0" [pid 636] setpgid(0, 0 [pid 634] <... chdir resumed>) = 0 [pid 636] <... setpgid resumed>) = 0 [pid 634] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 636] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 637] <... setpgid resumed>) = 0 [pid 634] <... open resumed>) = 3 [pid 636] <... openat resumed>) = 3 [pid 634] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 636] write(3, "1000", 4executing program ) = 4 [pid 634] <... mount resumed>) = 0 [pid 636] close(3 [pid 634] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 636] <... close resumed>) = 0 [pid 634] <... open resumed>) = 4 [pid 636] write(1, "executing program\n", 18 [pid 634] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 636] <... write resumed>) = 18 executing program [pid 637] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 638] <... write resumed>) = 18 [pid 638] memfd_create("syzkaller", 0 [pid 634] <... mmap resumed>) = 0x20000000 [pid 636] memfd_create("syzkaller", 0 [pid 634] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 636] <... memfd_create resumed>) = 3 [pid 634] <... openat resumed>) = 5 [pid 636] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 634] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 636] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 634] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 637] <... openat resumed>) = 3 [pid 638] <... memfd_create resumed>) = 3 [pid 638] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 637] write(3, "1000", 4) = 4 [pid 637] close(3) = 0 [pid 637] write(1, "executing program\n", 18 [pid 638] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 636] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 635] <... write resumed>) = 1048576 [pid 634] exit_group(0) = ? executing program [pid 637] <... write resumed>) = 18 [pid 635] munmap(0x7f1ddd1fa000, 138412032 [pid 634] +++ exited with 0 +++ [pid 637] memfd_create("syzkaller", 0) = 3 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=634, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 637] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 637] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 636] <... write resumed>) = 1048576 [pid 635] <... munmap resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 635] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3 [pid 635] <... openat resumed>) = 4 [pid 295] <... close resumed>) = 0 [pid 635] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 635] ioctl(4, LOOP_CLR_FD [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 639 [pid 635] <... ioctl resumed>) = 0 [pid 636] munmap(0x7f1ddd1fa000, 138412032 [pid 635] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 635] close(4) = 0 [pid 635] close(3 [pid 637] <... write resumed>) = 1048576 [pid 635] <... close resumed>) = 0 [pid 635] chdir("./file0"./strace-static-x86_64: Process 639 attached [pid 639] set_robust_list(0x55555671f660, 24) = 0 [pid 639] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 635] <... chdir resumed>) = 0 [pid 635] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 639] <... prctl resumed>) = 0 [pid 639] setpgid(0, 0) = 0 [pid 639] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 635] <... open resumed>) = 3 [pid 635] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 636] <... munmap resumed>) = 0 [pid 637] munmap(0x7f1ddd1fa000, 138412032 [pid 639] <... openat resumed>) = 3 [pid 637] <... munmap resumed>) = 0 [pid 639] write(3, "1000", 4 [pid 635] <... mount resumed>) = 0 [pid 639] <... write resumed>) = 4 [pid 639] close(3) = 0 [pid 639] write(1, "executing program\n", 18executing program ) = 18 [pid 639] memfd_create("syzkaller", 0 [pid 637] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 639] <... memfd_create resumed>) = 3 [pid 635] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 638] <... write resumed>) = 1048576 [pid 637] ioctl(4, LOOP_SET_FD, 3 [pid 639] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 637] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 639] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 637] ioctl(4, LOOP_CLR_FD) = 0 [pid 635] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 636] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 638] munmap(0x7f1ddd1fa000, 138412032 [pid 636] <... openat resumed>) = 4 [pid 637] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 637] close(4) = 0 [pid 637] close(3 [pid 638] <... munmap resumed>) = 0 [pid 636] ioctl(4, LOOP_SET_FD, 3 [pid 635] <... mmap resumed>) = 0x20000000 [pid 636] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 638] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 635] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 636] ioctl(4, LOOP_CLR_FD [pid 638] <... openat resumed>) = 4 [pid 636] <... ioctl resumed>) = 0 [pid 638] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 635] <... openat resumed>) = 5 [pid 638] ioctl(4, LOOP_CLR_FD [pid 635] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 637] <... close resumed>) = 0 [pid 638] <... ioctl resumed>) = 0 [pid 636] ioctl(4, LOOP_SET_FD, 3 [pid 635] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 636] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 636] close(4) = 0 [pid 635] exit_group(0 [pid 636] close(3) = 0 [pid 637] chdir("./file0" [pid 635] <... exit_group resumed>) = ? [pid 638] ioctl(4, LOOP_SET_FD, 3 [pid 635] +++ exited with 0 +++ [pid 638] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=635, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 638] close(4) = 0 [pid 638] close(3 [pid 637] <... chdir resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 640 [pid 638] <... close resumed>) = 0 [pid 637] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 640 attached [pid 638] chdir("./file0" [pid 636] chdir("./file0" [pid 637] <... open resumed>) = 3 [pid 636] <... chdir resumed>) = 0 [pid 638] <... chdir resumed>) = 0 [pid 637] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 636] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 640] set_robust_list(0x55555671f660, 24 [pid 638] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 637] <... mount resumed>) = 0 [pid 636] <... open resumed>) = 3 [pid 637] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 639] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 638] <... open resumed>) = 3 [pid 637] <... open resumed>) = 4 [pid 636] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 640] <... set_robust_list resumed>) = 0 [pid 638] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 636] <... mount resumed>) = 0 [pid 637] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 638] <... mount resumed>) = 0 [pid 637] <... mmap resumed>) = 0x20000000 [pid 638] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 636] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 640] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 636] <... open resumed>) = 4 [pid 638] <... open resumed>) = 4 [pid 636] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 637] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 638] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 637] <... openat resumed>) = 5 [pid 636] <... mmap resumed>) = 0x20000000 [pid 640] <... prctl resumed>) = 0 [pid 638] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 637] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 640] setpgid(0, 0 [pid 636] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 638] <... openat resumed>) = 5 [pid 637] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 636] <... openat resumed>) = 5 [pid 637] exit_group(0 [pid 636] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 640] <... setpgid resumed>) = 0 [pid 638] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 637] <... exit_group resumed>) = ? [pid 636] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 640] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 637] +++ exited with 0 +++ [pid 636] exit_group(0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=637, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 638] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 640] <... openat resumed>) = 3 [pid 636] <... exit_group resumed>) = ? [pid 638] exit_group(0 [pid 636] +++ exited with 0 +++ [pid 638] <... exit_group resumed>) = ? [pid 640] write(3, "1000", 4 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=636, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 639] <... write resumed>) = 1048576 [pid 639] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 639] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 638] +++ exited with 0 +++ [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 640] <... write resumed>) = 4 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=638, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 640] close(3 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 640] <... close resumed>) = 0 [pid 640] write(1, "executing program\n", 18executing program ) = 18 [pid 640] memfd_create("syzkaller", 0) = 3 [pid 640] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 639] <... openat resumed>) = 4 [pid 639] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 639] ioctl(4, LOOP_CLR_FD) = 0 [pid 639] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 641 [pid 639] close(4 [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 297] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... close resumed>) = 0 [pid 639] <... close resumed>) = 0 [pid 639] close(3 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 642 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 643 [pid 639] <... close resumed>) = 0 [pid 640] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 642 attached ./strace-static-x86_64: Process 641 attached ./strace-static-x86_64: Process 643 attached [pid 639] chdir("./file0" [pid 643] set_robust_list(0x55555671f660, 24 [pid 639] <... chdir resumed>) = 0 [pid 642] set_robust_list(0x55555671f660, 24) = 0 [pid 641] set_robust_list(0x55555671f660, 24 [pid 642] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 641] <... set_robust_list resumed>) = 0 [pid 642] <... prctl resumed>) = 0 [pid 641] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 639] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 642] setpgid(0, 0 [pid 641] <... prctl resumed>) = 0 [pid 640] <... write resumed>) = 1048576 [pid 642] <... setpgid resumed>) = 0 [pid 641] setpgid(0, 0 [pid 642] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 641] <... setpgid resumed>) = 0 [pid 640] munmap(0x7f1ddd1fa000, 138412032executing program [pid 642] <... openat resumed>) = 3 [pid 641] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 642] write(3, "1000", 4 [pid 641] <... openat resumed>) = 3 [pid 642] <... write resumed>) = 4 [pid 641] write(3, "1000", 4 [pid 642] close(3 [pid 641] <... write resumed>) = 4 [pid 642] <... close resumed>) = 0 [pid 641] close(3 [pid 642] write(1, "executing program\n", 18 [pid 641] <... close resumed>) = 0 [pid 642] <... write resumed>) = 18 [pid 641] write(1, "executing program\n", 18executing program [pid 642] memfd_create("syzkaller", 0 [pid 641] <... write resumed>) = 18 [pid 640] <... munmap resumed>) = 0 [pid 642] <... memfd_create resumed>) = 3 [pid 642] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 641] memfd_create("syzkaller", 0 [pid 640] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 642] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 641] <... memfd_create resumed>) = 3 [pid 643] <... set_robust_list resumed>) = 0 [pid 639] <... open resumed>) = 3 [pid 643] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 641] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 643] setpgid(0, 0) = 0 [pid 643] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 639] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 643] write(3, "1000", 4) = 4 [pid 643] close(3) = 0 [pid 639] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 643] write(1, "executing program\n", 18executing program [pid 639] <... open resumed>) = 4 [pid 643] <... write resumed>) = 18 [pid 643] memfd_create("syzkaller", 0) = 3 [pid 639] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 643] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 639] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 639] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 639] exit_group(0) = ? [pid 640] <... openat resumed>) = 4 [pid 640] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 640] ioctl(4, LOOP_CLR_FD) = 0 [pid 639] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=639, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 640] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 640] close(4) = 0 [pid 640] close(3 [pid 643] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 640] <... close resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 640] chdir("./file0") = 0 [pid 640] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 644 [pid 640] <... open resumed>) = 3 [pid 642] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 640] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 641] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 640] <... mount resumed>) = 0 [pid 640] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 640] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 643] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 644 attached [pid 644] set_robust_list(0x55555671f660, 24) = 0 [pid 644] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 643] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 644] <... prctl resumed>) = 0 [pid 644] setpgid(0, 0) = 0 [pid 644] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 643] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 643] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 643] ioctl(4, LOOP_CLR_FD) = 0 [pid 644] write(3, "1000", 4) = 4 [pid 644] close(3) = 0 [pid 644] write(1, "executing program\n", 18executing program ) = 18 [pid 643] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 643] close(4) = 0 [pid 644] memfd_create("syzkaller", 0 [pid 643] close(3 [pid 644] <... memfd_create resumed>) = 3 [pid 644] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 640] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 640] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 640] exit_group(0 [pid 642] <... write resumed>) = 1048576 [pid 640] <... exit_group resumed>) = ? [pid 640] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=640, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 643] <... close resumed>) = 0 [pid 642] munmap(0x7f1ddd1fa000, 138412032 [pid 641] <... write resumed>) = 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 642] <... munmap resumed>) = 0 [pid 641] munmap(0x7f1ddd1fa000, 138412032 [pid 642] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 641] <... munmap resumed>) = 0 [pid 643] chdir("./file0" [pid 642] <... openat resumed>) = 4 [pid 642] ioctl(4, LOOP_SET_FD, 3 [pid 641] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 642] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 641] <... openat resumed>) = 4 [pid 642] ioctl(4, LOOP_CLR_FD [pid 641] ioctl(4, LOOP_SET_FD, 3 [pid 298] <... openat resumed>) = 3 [pid 642] <... ioctl resumed>) = 0 [pid 641] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 298] ioctl(3, LOOP_CLR_FD [pid 641] ioctl(4, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 641] <... ioctl resumed>) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 643] <... chdir resumed>) = 0 [pid 643] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 645 [pid 642] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 641] ioctl(4, LOOP_SET_FD, 3 [pid 642] close(4 [pid 641] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 642] <... close resumed>) = 0 [pid 641] close(4 [pid 642] close(3 [pid 641] <... close resumed>) = 0 [pid 643] <... open resumed>) = 3 [pid 643] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 643] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 643] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 643] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 642] <... close resumed>) = 0 [pid 641] close(3 [pid 642] chdir("./file0" [pid 643] <... openat resumed>) = 5 [pid 643] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 643] exit_group(0) = ? [pid 643] +++ exited with 0 +++ [pid 641] <... close resumed>) = 0 [pid 642] <... chdir resumed>) = 0 [pid 641] chdir("./file0" [pid 642] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=643, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 641] <... chdir resumed>) = 0 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 641] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 642] <... open resumed>) = 3 [pid 641] <... open resumed>) = 3 [pid 642] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 641] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 642] <... mount resumed>) = 0 [pid 641] <... mount resumed>) = 0 [pid 642] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 641] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 642] <... open resumed>) = 4 [pid 641] <... open resumed>) = 4 [pid 642] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 641] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 644] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 646 [pid 641] <... mmap resumed>) = 0x20000000 [pid 641] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 642] <... mmap resumed>) = 0x20000000 [pid 641] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 642] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 641] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 642] <... openat resumed>) = 5 [pid 641] exit_group(0 [pid 642] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 641] <... exit_group resumed>) = ? [pid 642] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 641] +++ exited with 0 +++ [pid 642] exit_group(0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=641, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 642] <... exit_group resumed>) = ? [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 642] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=642, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 644] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 646 attached [pid 646] set_robust_list(0x55555671f660, 24) = 0 [pid 646] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 646] setpgid(0, 0) = 0 [pid 646] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 645 attached [pid 299] <... restart_syscall resumed>) = 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 647 [pid 645] set_robust_list(0x55555671f660, 24) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 645] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 299] <... openat resumed>) = 3 [pid 645] <... prctl resumed>) = 0 [pid 299] ioctl(3, LOOP_CLR_FD [pid 645] setpgid(0, 0 [pid 299] <... ioctl resumed>) = 0 [pid 645] <... setpgid resumed>) = 0 [pid 299] close(3) = 0 [pid 645] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 646] write(3, "1000", 4) = 4 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 648 [pid 645] <... openat resumed>) = 3 [pid 645] write(3, "1000", 4) = 4 [pid 645] close(3) = 0 [pid 645] write(1, "executing program\n", 18executing program ) = 18 [pid 645] memfd_create("syzkaller", 0) = 3 [pid 645] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 646] close(3) = 0 [pid 646] write(1, "executing program\n", 18executing program ) = 18 [pid 646] memfd_create("syzkaller", 0) = 3 [pid 646] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 645] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 644] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 644] openat(AT_FDCWD, "/dev/loop0", O_RDWR./strace-static-x86_64: Process 647 attached [pid 647] set_robust_list(0x55555671f660, 24 [pid 644] <... openat resumed>) = 4 [pid 644] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 644] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 648 attached [pid 647] <... set_robust_list resumed>) = 0 [pid 647] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 648] set_robust_list(0x55555671f660, 24) = 0 [pid 648] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 644] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 644] close(4) = 0 [pid 644] close(3) = 0 [pid 648] <... prctl resumed>) = 0 [pid 648] setpgid(0, 0) = 0 [pid 648] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 648] write(3, "1000", 4) = 4 [pid 648] close(3) = 0 [pid 648] write(1, "executing program\n", 18executing program ) = 18 [pid 648] memfd_create("syzkaller", 0) = 3 [pid 648] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 647] <... prctl resumed>) = 0 [pid 647] setpgid(0, 0) = 0 [pid 647] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 647] write(3, "1000", 4) = 4 [pid 647] close(3) = 0 [pid 647] write(1, "executing program\n", 18executing program ) = 18 [pid 647] memfd_create("syzkaller", 0) = 3 [pid 647] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 644] chdir("./file0") = 0 [pid 644] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 648] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 644] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 647] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 644] <... mount resumed>) = 0 [pid 644] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 644] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 644] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 645] <... write resumed>) = 1048576 [pid 644] <... openat resumed>) = 5 [pid 644] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 645] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 644] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 644] exit_group(0) = ? [pid 644] +++ exited with 0 +++ [pid 645] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=644, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 645] <... openat resumed>) = 4 [pid 645] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 645] ioctl(4, LOOP_CLR_FD) = 0 [pid 646] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 645] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 645] close(4) = 0 [pid 645] close(3) = 0 [pid 647] <... write resumed>) = 1048576 [pid 645] chdir("./file0" [pid 647] munmap(0x7f1ddd1fa000, 138412032 [pid 645] <... chdir resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 645] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 647] <... munmap resumed>) = 0 [pid 645] <... open resumed>) = 3 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 647] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 645] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3 [pid 645] <... mount resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 645] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 647] <... openat resumed>) = 4 [pid 647] ioctl(4, LOOP_SET_FD, 3 [pid 645] <... open resumed>) = 4 [pid 647] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 649 [pid 647] ioctl(4, LOOP_CLR_FD [pid 645] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 647] <... ioctl resumed>) = 0 [pid 645] <... mmap resumed>) = 0x20000000 [pid 645] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 645] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 645] exit_group(0) = ? [pid 646] <... write resumed>) = 1048576 [pid 646] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 645] +++ exited with 0 +++ [pid 647] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=645, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 647] close(4 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 647] <... close resumed>) = 0 [pid 647] close(3) = 0 [pid 646] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 647] chdir("./file0" [pid 646] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 646] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 649 attached [pid 649] set_robust_list(0x55555671f660, 24) = 0 [pid 647] <... chdir resumed>) = 0 [pid 647] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 647] <... open resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 650 [pid 646] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 646] close(4) = 0 [pid 646] close(3 [pid 647] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 650 attached ) = 0 [pid 650] set_robust_list(0x55555671f660, 24 [pid 647] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 650] <... set_robust_list resumed>) = 0 [pid 647] <... open resumed>) = 4 [pid 647] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 647] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 650] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 647] <... openat resumed>) = 5 [pid 647] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 650] setpgid(0, 0 [pid 647] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 647] exit_group(0 [pid 650] <... setpgid resumed>) = 0 [pid 647] <... exit_group resumed>) = ? [pid 649] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 649] setpgid(0, 0) = 0 [pid 649] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 647] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=647, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 650] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 649] <... openat resumed>) = 3 [pid 649] write(3, "1000", 4) = 4 [pid 646] <... close resumed>) = 0 [pid 649] close(3) = 0 [pid 649] write(1, "executing program\n", 18 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 651 executing program [pid 649] <... write resumed>) = 18 [pid 649] memfd_create("syzkaller", 0 [pid 650] <... openat resumed>) = 3 ./strace-static-x86_64: Process 651 attached [pid 650] write(3, "1000", 4) = 4 executing program [pid 651] set_robust_list(0x55555671f660, 24 [pid 650] close(3) = 0 [pid 651] <... set_robust_list resumed>) = 0 [pid 650] write(1, "executing program\n", 18) = 18 [pid 651] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 650] memfd_create("syzkaller", 0 [pid 651] <... prctl resumed>) = 0 [pid 650] <... memfd_create resumed>) = 3 [pid 651] setpgid(0, 0 [pid 650] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 651] <... setpgid resumed>) = 0 [pid 649] <... memfd_create resumed>) = 3 [pid 648] <... write resumed>) = 1048576 [pid 649] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 648] munmap(0x7f1ddd1fa000, 138412032 [pid 651] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 650] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 649] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 646] chdir("./file0" [pid 651] <... openat resumed>) = 3 [pid 651] write(3, "1000", 4) = 4 [pid 651] close(3) = 0 executing program [pid 651] write(1, "executing program\n", 18) = 18 [pid 648] <... munmap resumed>) = 0 [pid 651] memfd_create("syzkaller", 0) = 3 [pid 651] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 648] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 651] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 648] <... openat resumed>) = 4 [pid 648] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 648] ioctl(4, LOOP_CLR_FD [pid 646] <... chdir resumed>) = 0 [pid 648] <... ioctl resumed>) = 0 [pid 646] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 646] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 646] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 648] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 648] close(4) = 0 [pid 648] close(3 [pid 646] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 648] <... close resumed>) = 0 [pid 646] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 651] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 646] <... openat resumed>) = 5 [pid 646] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 646] exit_group(0) = ? [pid 646] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=646, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 648] chdir("./file0") = 0 [pid 648] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 650] <... write resumed>) = 1048576 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 648] <... open resumed>) = 3 [pid 648] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 652 [pid 648] <... mount resumed>) = 0 [pid 648] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 648] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 648] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 648] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) ./strace-static-x86_64: Process 652 attached [pid 648] exit_group(0 [pid 652] set_robust_list(0x55555671f660, 24 [pid 650] munmap(0x7f1ddd1fa000, 138412032 [pid 648] <... exit_group resumed>) = ? [pid 652] <... set_robust_list resumed>) = 0 [pid 651] <... write resumed>) = 1048576 [pid 650] <... munmap resumed>) = 0 [pid 650] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 650] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 650] ioctl(4, LOOP_CLR_FD) = 0 [pid 649] <... write resumed>) = 1048576 [pid 650] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 650] close(4) = 0 [pid 650] close(3) = 0 [pid 650] chdir("./file0") = 0 [pid 650] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 651] munmap(0x7f1ddd1fa000, 138412032 [pid 648] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=648, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 651] <... munmap resumed>) = 0 [pid 651] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 650] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 652] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 651] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 651] ioctl(4, LOOP_CLR_FD) = 0 [pid 652] <... prctl resumed>) = 0 [pid 650] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 649] munmap(0x7f1ddd1fa000, 138412032 [pid 652] setpgid(0, 0) = 0 [pid 652] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 652] write(3, "1000", 4) = 4 [pid 652] close(3) = 0 executing program [pid 652] write(1, "executing program\n", 18) = 18 [pid 652] memfd_create("syzkaller", 0) = 3 [pid 652] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 651] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 651] close(4) = 0 [pid 651] close(3 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 651] <... close resumed>) = 0 [pid 299] <... openat resumed>) = 3 [pid 651] chdir("./file0" [pid 299] ioctl(3, LOOP_CLR_FD [pid 651] <... chdir resumed>) = 0 [pid 299] <... ioctl resumed>) = 0 [pid 651] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 299] close(3) = 0 [pid 651] <... open resumed>) = 3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 651] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 653 [pid 651] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 651] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 649] <... munmap resumed>) = 0 [pid 650] <... open resumed>) = 4 [pid 650] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 651] <... mmap resumed>) = 0x20000000 [pid 651] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 651] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 651] exit_group(0) = ? [pid 650] <... mmap resumed>) = 0x20000000 [pid 649] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 651] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=651, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 649] <... openat resumed>) = 4 [pid 649] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 649] ioctl(4, LOOP_CLR_FD) = 0 [pid 650] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 653 attached [pid 653] set_robust_list(0x55555671f660, 24) = 0 [pid 650] <... openat resumed>) = 5 [pid 653] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 649] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 649] close(4) = 0 [pid 649] close(3 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 653] <... prctl resumed>) = 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 654 [pid 653] setpgid(0, 0) = 0 [pid 650] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 650] exit_group(0) = ? [pid 653] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 652] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 653] write(3, "1000", 4 [pid 649] <... close resumed>) = 0 [pid 650] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=650, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 649] chdir("./file0") = 0 [pid 649] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 653] <... write resumed>) = 4 [pid 653] close(3./strace-static-x86_64: Process 654 attached ) = 0 [pid 649] <... open resumed>) = 3 [pid 649] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 653] write(1, "executing program\n", 18 [pid 654] set_robust_list(0x55555671f660, 24executing program [pid 653] <... write resumed>) = 18 [pid 649] <... mount resumed>) = 0 [pid 649] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 649] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 653] memfd_create("syzkaller", 0 [pid 654] <... set_robust_list resumed>) = 0 [pid 654] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 653] <... memfd_create resumed>) = 3 [pid 649] <... mmap resumed>) = 0x20000000 [pid 653] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 655 [pid 649] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 649] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 649] exit_group(0) = ? [pid 649] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=649, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 652] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 655 attached [pid 655] set_robust_list(0x55555671f660, 24) = 0 [pid 655] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 655] setpgid(0, 0) = 0 [pid 655] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 652] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 653] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 655] <... openat resumed>) = 3 [pid 655] write(3, "1000", 4) = 4 [pid 655] close(3) = 0 [pid 652] openat(AT_FDCWD, "/dev/loop2", O_RDWRexecuting program ) = 4 [pid 655] write(1, "executing program\n", 18) = 18 [pid 655] memfd_create("syzkaller", 0 [pid 652] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 652] ioctl(4, LOOP_CLR_FD) = 0 [pid 655] <... memfd_create resumed>) = 3 [pid 654] <... prctl resumed>) = 0 [pid 655] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 654] setpgid(0, 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 654] <... setpgid resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 654] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 652] ioctl(4, LOOP_SET_FD, 3 [pid 295] <... ioctl resumed>) = 0 [pid 652] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 295] close(3 [pid 652] close(4 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 654] <... openat resumed>) = 3 [pid 652] <... close resumed>) = 0 [pid 652] close(3 [pid 654] write(3, "1000", 4 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 656 [pid 654] <... write resumed>) = 4 [pid 654] close(3) = 0 [pid 654] write(1, "executing program\n", 18executing program ) = 18 [pid 654] memfd_create("syzkaller", 0) = 3 [pid 654] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 executing program [pid 652] <... close resumed>) = 0 [pid 652] chdir("./file0") = 0 [pid 652] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 652] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 652] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 ./strace-static-x86_64: Process 656 attached [pid 652] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 656] set_robust_list(0x55555671f660, 24 [pid 652] <... mmap resumed>) = 0x20000000 [pid 656] <... set_robust_list resumed>) = 0 [pid 656] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 656] setpgid(0, 0) = 0 [pid 656] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 656] write(3, "1000", 4) = 4 [pid 656] close(3) = 0 [pid 656] write(1, "executing program\n", 18) = 18 [pid 656] memfd_create("syzkaller", 0) = 3 [pid 656] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 654] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 652] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 652] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 652] exit_group(0) = ? [pid 653] <... write resumed>) = 1048576 [pid 653] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 653] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 652] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=652, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 653] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 653] ioctl(4, LOOP_CLR_FD) = 0 [pid 655] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 656] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 653] ioctl(4, LOOP_SET_FD, 3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 657 [pid 653] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 653] close(4) = 0 [pid 653] close(3 [pid 655] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 657 attached [pid 657] set_robust_list(0x55555671f660, 24) = 0 [pid 657] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 657] setpgid(0, 0) = 0 [pid 657] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 653] <... close resumed>) = 0 [pid 657] write(3, "1000", 4) = 4 [pid 655] munmap(0x7f1ddd1fa000, 138412032executing program ) = 0 [pid 657] close(3) = 0 [pid 657] write(1, "executing program\n", 18) = 18 [pid 657] memfd_create("syzkaller", 0) = 3 [pid 657] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 655] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 657] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 655] <... openat resumed>) = 4 [pid 655] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 655] ioctl(4, LOOP_CLR_FD) = 0 [pid 653] chdir("./file0" [pid 655] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 655] close(4) = 0 [pid 655] close(3 [pid 653] <... chdir resumed>) = 0 [pid 653] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 654] <... write resumed>) = 1048576 [pid 653] <... open resumed>) = 3 [pid 654] munmap(0x7f1ddd1fa000, 138412032 [pid 653] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 653] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 653] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 655] <... close resumed>) = 0 [pid 653] <... mmap resumed>) = 0x20000000 [pid 653] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 653] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 654] <... munmap resumed>) = 0 [pid 653] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 654] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 653] exit_group(0 [pid 655] chdir("./file0") = 0 [pid 655] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 653] <... exit_group resumed>) = ? [pid 654] <... openat resumed>) = 4 [pid 656] <... write resumed>) = 1048576 [pid 655] <... open resumed>) = 3 [pid 655] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 655] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 653] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=653, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 654] ioctl(4, LOOP_SET_FD, 3 [pid 655] <... open resumed>) = 4 [pid 655] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 654] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 654] ioctl(4, LOOP_CLR_FD [pid 656] munmap(0x7f1ddd1fa000, 138412032 [pid 654] <... ioctl resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 654] ioctl(4, LOOP_SET_FD, 3 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 658 [pid 654] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 656] <... munmap resumed>) = 0 [pid 656] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 654] close(4 [pid 656] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 656] ioctl(4, LOOP_CLR_FD) = 0 [pid 654] <... close resumed>) = 0 [pid 654] close(3 [pid 655] <... mmap resumed>) = 0x20000000 [pid 657] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 656] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 656] close(4) = 0 [pid 656] close(3 [pid 654] <... close resumed>) = 0 [pid 654] chdir("./file0") = 0 [pid 655] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 654] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 655] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 655] exit_group(0 [pid 654] <... open resumed>) = 3 [pid 655] <... exit_group resumed>) = ? [pid 654] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 654] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 654] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 654] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 655] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=655, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 654] <... openat resumed>) = 5 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 654] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 659 [pid 656] <... close resumed>) = 0 [pid 656] chdir("./file0") = 0 [pid 656] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 654] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 654] exit_group(0./strace-static-x86_64: Process 658 attached ) = ? [pid 656] <... open resumed>) = 3 [pid 654] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=654, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 656] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 658] set_robust_list(0x55555671f660, 24 [pid 656] <... mount resumed>) = 0 [pid 656] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 656] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 658] <... set_robust_list resumed>) = 0 [pid 658] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 658] setpgid(0, 0) = 0 [pid 656] <... mmap resumed>) = 0x20000000 [pid 656] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 658] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 656] <... openat resumed>) = 5 [pid 656] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 656] exit_group(0) = ? [pid 656] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=656, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 658] write(3, "1000", 4) = 4 ./strace-static-x86_64: Process 659 attached [pid 658] close(3 [pid 659] set_robust_list(0x55555671f660, 24) = 0 [pid 658] <... close resumed>) = 0 [pid 659] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 659] setpgid(0, 0 [pid 658] write(1, "executing program\n", 18 [pid 659] <... setpgid resumed>) = 0 [pid 659] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program ) = 3 [pid 658] <... write resumed>) = 18 executing program [pid 658] memfd_create("syzkaller", 0 [pid 659] write(3, "1000", 4) = 4 [pid 659] close(3) = 0 [pid 659] write(1, "executing program\n", 18) = 18 [pid 659] memfd_create("syzkaller", 0) = 3 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 658] <... memfd_create resumed>) = 3 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 660 [pid 659] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 659] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 657] <... write resumed>) = 1048576 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 661 [pid 658] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 657] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 657] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 657] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 657] ioctl(4, LOOP_CLR_FD) = 0 [pid 659] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 657] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 657] close(4 [pid 658] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 657] <... close resumed>) = 0 [pid 657] close(3./strace-static-x86_64: Process 661 attached [pid 661] set_robust_list(0x55555671f660, 24) = 0 [pid 661] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 661] setpgid(0, 0) = 0 [pid 661] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 661] write(3, "1000", 4) = 4 [pid 661] close(3) = 0 [pid 661] write(1, "executing program\n", 18executing program ) = 18 [pid 661] memfd_create("syzkaller", 0) = 3 [pid 661] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 660 attached [pid 657] <... close resumed>) = 0 [pid 660] set_robust_list(0x55555671f660, 24) = 0 [pid 657] chdir("./file0") = 0 [pid 657] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 660] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 657] <... open resumed>) = 3 [pid 660] <... prctl resumed>) = 0 [pid 660] setpgid(0, 0 [pid 657] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 660] <... setpgid resumed>) = 0 [pid 660] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 657] <... mount resumed>) = 0 [pid 657] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 660] <... openat resumed>) = 3 [pid 657] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 660] write(3, "1000", 4) = 4 [pid 660] close(3) = 0 [pid 657] <... mmap resumed>) = 0x20000000 [pid 657] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 657] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 657] exit_group(0) = ? [pid 660] write(1, "executing program\n", 18executing program ) = 18 [pid 660] memfd_create("syzkaller", 0 [pid 657] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=657, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 660] <... memfd_create resumed>) = 3 [pid 661] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 658] <... write resumed>) = 1048576 [pid 660] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 659] <... write resumed>) = 1048576 [pid 659] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 659] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 297] <... restart_syscall resumed>) = 0 [pid 658] munmap(0x7f1ddd1fa000, 138412032 [pid 659] ioctl(4, LOOP_SET_FD, 3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 658] <... munmap resumed>) = 0 [pid 297] close(3 [pid 658] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 659] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 659] ioctl(4, LOOP_CLR_FD) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 662 [pid 658] <... openat resumed>) = 4 [pid 658] ioctl(4, LOOP_SET_FD, 3 [pid 661] <... write resumed>) = 1048576 [pid 659] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 659] close(4) = 0 [pid 659] close(3) = 0 ./strace-static-x86_64: Process 662 attached [pid 662] set_robust_list(0x55555671f660, 24) = 0 [pid 662] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 661] munmap(0x7f1ddd1fa000, 138412032 [pid 662] setpgid(0, 0 [pid 661] <... munmap resumed>) = 0 [pid 662] <... setpgid resumed>) = 0 [pid 662] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 659] chdir("./file0" [pid 662] <... openat resumed>) = 3 [pid 659] <... chdir resumed>) = 0 [pid 659] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 661] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 662] write(3, "1000", 4) = 4 [pid 662] close(3 [pid 661] ioctl(4, LOOP_SET_FD, 3 [pid 662] <... close resumed>) = 0 [pid 661] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 661] ioctl(4, LOOP_CLR_FD [pid 662] write(1, "executing program\n", 18executing program [pid 661] <... ioctl resumed>) = 0 [pid 662] <... write resumed>) = 18 [pid 662] memfd_create("syzkaller", 0 [pid 659] <... open resumed>) = 3 [pid 658] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 662] <... memfd_create resumed>) = 3 [pid 662] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 659] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 661] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 660] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 658] ioctl(4, LOOP_CLR_FD [pid 661] close(4) = 0 [pid 661] close(3 [pid 660] <... write resumed>) = 1048576 [pid 658] <... ioctl resumed>) = 0 [pid 660] munmap(0x7f1ddd1fa000, 138412032 [pid 659] <... mount resumed>) = 0 [pid 659] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 659] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 658] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 658] close(4) = 0 [pid 658] close(3) = 0 [pid 658] chdir("./file0" [pid 660] <... munmap resumed>) = 0 [pid 658] <... chdir resumed>) = 0 [pid 660] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 658] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 660] <... openat resumed>) = 4 [pid 658] <... open resumed>) = 3 [pid 660] ioctl(4, LOOP_SET_FD, 3 [pid 658] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 660] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 658] <... mount resumed>) = 0 [pid 660] ioctl(4, LOOP_CLR_FD [pid 658] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 660] <... ioctl resumed>) = 0 [pid 658] <... open resumed>) = 4 [pid 658] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 659] <... mmap resumed>) = 0x20000000 [pid 659] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 659] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 658] <... mmap resumed>) = 0x20000000 [pid 658] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 660] ioctl(4, LOOP_SET_FD, 3 [pid 658] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 660] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 658] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 660] close(4 [pid 658] exit_group(0 [pid 660] <... close resumed>) = 0 [pid 658] <... exit_group resumed>) = ? [pid 660] close(3 [pid 659] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 659] exit_group(0) = ? [pid 658] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=658, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 659] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=659, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] close(3 [pid 299] <... openat resumed>) = 3 [pid 298] <... close resumed>) = 0 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 660] <... close resumed>) = 0 [pid 299] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 663 [pid 299] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 664 [pid 661] <... close resumed>) = 0 [pid 661] chdir("./file0") = 0 [pid 661] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 660] chdir("./file0"./strace-static-x86_64: Process 663 attached ./strace-static-x86_64: Process 664 attached [pid 663] set_robust_list(0x55555671f660, 24 [pid 662] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 661] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 660] <... chdir resumed>) = 0 [pid 664] set_robust_list(0x55555671f660, 24) = 0 [pid 663] <... set_robust_list resumed>) = 0 [pid 660] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 664] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 663] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 660] <... open resumed>) = 3 [pid 664] <... prctl resumed>) = 0 [pid 663] <... prctl resumed>) = 0 [pid 660] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 664] setpgid(0, 0) = 0 [pid 663] setpgid(0, 0 [pid 660] <... mount resumed>) = 0 [pid 663] <... setpgid resumed>) = 0 [pid 664] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 663] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 661] <... mount resumed>) = 0 [pid 660] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 664] write(3, "1000", 4) = 4 [pid 663] <... openat resumed>) = 3 [pid 660] <... open resumed>) = 4 [pid 664] close(3 [pid 663] write(3, "1000", 4 [pid 660] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 664] <... close resumed>) = 0 [pid 663] <... write resumed>) = 4 [pid 661] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 661] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 664] write(1, "executing program\n", 18 [pid 663] close(3 [pid 661] <... mmap resumed>) = 0x20000000 [pid 660] <... mmap resumed>) = 0x20000000 [pid 664] <... write resumed>) = 18 [pid 663] <... close resumed>) = 0 [pid 660] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000executing program [pid 664] memfd_create("syzkaller", 0 [pid 663] write(1, "executing program\n", 18 [pid 660] <... openat resumed>) = 5 [pid 664] <... memfd_create resumed>) = 3 [pid 663] <... write resumed>) = 18 [pid 660] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 664] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 663] memfd_create("syzkaller", 0 [pid 660] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 661] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 661] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 661] exit_group(0) = ? [pid 661] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=661, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 663] <... memfd_create resumed>) = 3 [pid 660] exit_group(0 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 663] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 660] <... exit_group resumed>) = ? [pid 663] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 660] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=660, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 665 [pid 662] <... write resumed>) = 1048576 [pid 662] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 662] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 662] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 662] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 665 attached [pid 665] set_robust_list(0x55555671f660, 24) = 0 [pid 665] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 665] setpgid(0, 0) = 0 [pid 662] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 662] close(4) = 0 [pid 663] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 662] close(3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 666 [pid 664] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 662] <... close resumed>) = 0 [pid 665] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 662] chdir("./file0") = 0 [pid 662] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 ./strace-static-x86_64: Process 666 attached [pid 665] <... openat resumed>) = 3 [pid 663] <... write resumed>) = 1048576 [pid 666] set_robust_list(0x55555671f660, 24 [pid 665] write(3, "1000", 4 [pid 664] <... write resumed>) = 1048576 [pid 663] munmap(0x7f1ddd1fa000, 138412032 [pid 662] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 666] <... set_robust_list resumed>) = 0 [pid 665] <... write resumed>) = 4 [pid 662] <... mount resumed>) = 0 [pid 666] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 665] close(3 [pid 662] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 666] <... prctl resumed>) = 0 [pid 665] <... close resumed>) = 0 [pid 662] <... open resumed>) = 4 executing program [pid 666] setpgid(0, 0 [pid 665] write(1, "executing program\n", 18 [pid 662] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 666] <... setpgid resumed>) = 0 [pid 665] <... write resumed>) = 18 [pid 662] <... mmap resumed>) = 0x20000000 [pid 666] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 665] memfd_create("syzkaller", 0 [pid 662] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 666] <... openat resumed>) = 3 [pid 665] <... memfd_create resumed>) = 3 [pid 662] <... openat resumed>) = 5 [pid 666] write(3, "1000", 4 [pid 665] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 662] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 666] <... write resumed>) = 4 [pid 665] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 662] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 666] close(3 [pid 665] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 664] munmap(0x7f1ddd1fa000, 138412032 [pid 663] <... munmap resumed>) = 0 [pid 662] exit_group(0 [pid 666] <... close resumed>) = 0 [pid 664] <... munmap resumed>) = 0 [pid 663] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 662] <... exit_group resumed>) = ? [pid 664] openat(AT_FDCWD, "/dev/loop4", O_RDWRexecuting program [pid 666] write(1, "executing program\n", 18 [pid 664] <... openat resumed>) = 4 [pid 663] <... openat resumed>) = 4 [pid 662] +++ exited with 0 +++ [pid 666] <... write resumed>) = 18 [pid 664] ioctl(4, LOOP_SET_FD, 3 [pid 663] ioctl(4, LOOP_SET_FD, 3 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=662, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 666] memfd_create("syzkaller", 0 [pid 664] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 663] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 666] <... memfd_create resumed>) = 3 [pid 664] ioctl(4, LOOP_CLR_FD [pid 663] ioctl(4, LOOP_CLR_FD [pid 666] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 664] <... ioctl resumed>) = 0 [pid 663] <... ioctl resumed>) = 0 [pid 666] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 666] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 664] ioctl(4, LOOP_SET_FD, 3 [pid 663] ioctl(4, LOOP_SET_FD, 3 [pid 664] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 663] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 664] close(4 [pid 663] close(4 [pid 664] <... close resumed>) = 0 [pid 663] <... close resumed>) = 0 [pid 664] close(3 [pid 663] close(3 [pid 664] <... close resumed>) = 0 [pid 666] <... write resumed>) = 1048576 [pid 663] <... close resumed>) = 0 [pid 664] chdir("./file0" [pid 663] chdir("./file0" [pid 664] <... chdir resumed>) = 0 [pid 663] <... chdir resumed>) = 0 [pid 664] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 663] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 664] <... open resumed>) = 3 [pid 663] <... open resumed>) = 3 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 667 [pid 664] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 663] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 664] <... mount resumed>) = 0 [pid 664] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 663] <... mount resumed>) = 0 [pid 664] <... open resumed>) = 4 [pid 663] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 664] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 663] <... open resumed>) = 4 [pid 665] <... write resumed>) = 1048576 [pid 665] munmap(0x7f1ddd1fa000, 138412032 [pid 664] <... mmap resumed>) = 0x20000000 [pid 663] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 664] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 665] <... munmap resumed>) = 0 [pid 665] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 666] munmap(0x7f1ddd1fa000, 138412032 [pid 663] <... mmap resumed>) = 0x20000000 [pid 664] <... openat resumed>) = 5 [pid 664] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 663] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 664] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 664] exit_group(0 [pid 663] <... openat resumed>) = 5 [pid 664] <... exit_group resumed>) = ? [pid 663] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 666] <... munmap resumed>) = 0 [pid 665] <... openat resumed>) = 4 [pid 665] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 664] +++ exited with 0 +++ [pid 663] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=664, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 663] exit_group(0 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 663] <... exit_group resumed>) = ? [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 663] +++ exited with 0 +++ [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 668 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=663, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 665] ioctl(4, LOOP_CLR_FD) = 0 [pid 666] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 666] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 666] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 668 attached [pid 665] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 665] close(4) = 0 [pid 665] close(3 [pid 668] set_robust_list(0x55555671f660, 24) = 0 [pid 668] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 665] <... close resumed>) = 0 [pid 666] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 666] close(4) = 0 [pid 666] close(3 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 668] <... prctl resumed>) = 0 ./strace-static-x86_64: Process 669 attached [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 669 [pid 669] set_robust_list(0x55555671f660, 24 [pid 668] setpgid(0, 0 [pid 669] <... set_robust_list resumed>) = 0 [pid 668] <... setpgid resumed>) = 0 [pid 668] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 669] prctl(PR_SET_PDEATHSIG, SIGKILLexecuting program ) = 0 [pid 668] <... openat resumed>) = 3 [pid 669] setpgid(0, 0 [pid 668] write(3, "1000", 4 [pid 669] <... setpgid resumed>) = 0 [pid 668] <... write resumed>) = 4 [pid 668] close(3) = 0 [pid 669] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 668] write(1, "executing program\n", 18 [pid 669] <... openat resumed>) = 3 [pid 668] <... write resumed>) = 18 [pid 669] write(3, "1000", 4executing program ) = 4 [pid 668] memfd_create("syzkaller", 0 [pid 669] close(3) = 0 [pid 668] <... memfd_create resumed>) = 3 [pid 669] write(1, "executing program\n", 18 [pid 668] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 669] <... write resumed>) = 18 [pid 669] memfd_create("syzkaller", 0 [pid 668] <... mmap resumed>) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 667 attached [pid 667] set_robust_list(0x55555671f660, 24) = 0 [pid 667] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 667] setpgid(0, 0) = 0 [pid 667] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 666] <... close resumed>) = 0 [pid 667] write(3, "1000", 4) = 4 [pid 667] close(3) = 0 [pid 667] write(1, "executing program\n", 18executing program ) = 18 [pid 667] memfd_create("syzkaller", 0) = 3 [pid 667] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 668] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 669] <... memfd_create resumed>) = 3 [pid 669] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 665] chdir("./file0") = 0 [pid 665] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 666] chdir("./file0") = 0 [pid 666] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 665] <... open resumed>) = 3 [pid 665] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 665] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 665] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 666] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 665] <... mmap resumed>) = 0x20000000 [pid 666] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 666] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 665] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 665] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 669] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 665] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 665] exit_group(0 [pid 666] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 665] <... exit_group resumed>) = ? [pid 666] <... openat resumed>) = 5 [pid 665] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=665, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 666] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 666] exit_group(0) = ? [pid 666] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=666, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] ioctl(3, LOOP_CLR_FD [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 295] close(3 [pid 296] close(3) = 0 [pid 295] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 670 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 671 [pid 669] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 670 attached [pid 670] set_robust_list(0x55555671f660, 24) = 0 [pid 670] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 670] setpgid(0, 0) = 0 [pid 670] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 670] write(3, "1000", 4) = 4 [pid 670] close(3) = 0 [pid 670] write(1, "executing program\n", 18executing program ) = 18 [pid 670] memfd_create("syzkaller", 0) = 3 [pid 670] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 668] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 671 attached [pid 668] munmap(0x7f1ddd1fa000, 138412032 [pid 669] munmap(0x7f1ddd1fa000, 138412032 [pid 671] set_robust_list(0x55555671f660, 24 [pid 668] <... munmap resumed>) = 0 [pid 671] <... set_robust_list resumed>) = 0 [pid 669] <... munmap resumed>) = 0 [pid 668] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 671] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 668] <... openat resumed>) = 4 [pid 671] <... prctl resumed>) = 0 [pid 669] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 668] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 671] setpgid(0, 0 [pid 668] ioctl(4, LOOP_CLR_FD [pid 671] <... setpgid resumed>) = 0 [pid 669] <... openat resumed>) = 4 [pid 668] <... ioctl resumed>) = 0 [pid 671] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 669] ioctl(4, LOOP_SET_FD, 3 [pid 671] <... openat resumed>) = 3 [pid 669] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 671] write(3, "1000", 4 [pid 669] ioctl(4, LOOP_CLR_FD [pid 671] <... write resumed>) = 4 [pid 669] <... ioctl resumed>) = 0 [pid 671] close(3executing program ) = 0 [pid 671] write(1, "executing program\n", 18 [pid 670] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 671] <... write resumed>) = 18 [pid 668] ioctl(4, LOOP_SET_FD, 3 [pid 671] memfd_create("syzkaller", 0 [pid 669] ioctl(4, LOOP_SET_FD, 3 [pid 668] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 671] <... memfd_create resumed>) = 3 [pid 669] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 668] close(4 [pid 671] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 669] close(4 [pid 668] <... close resumed>) = 0 [pid 671] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 669] <... close resumed>) = 0 [pid 668] close(3 [pid 667] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 669] close(3 [pid 667] <... write resumed>) = 1048576 [pid 667] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 667] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 667] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 667] ioctl(4, LOOP_CLR_FD) = 0 [pid 668] <... close resumed>) = 0 [pid 669] <... close resumed>) = 0 [pid 668] chdir("./file0" [pid 669] chdir("./file0" [pid 668] <... chdir resumed>) = 0 [pid 669] <... chdir resumed>) = 0 [pid 668] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 667] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 667] close(4) = 0 [pid 667] close(3 [pid 671] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 669] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 668] <... open resumed>) = 3 [pid 669] <... open resumed>) = 3 [pid 668] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 669] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 668] <... mount resumed>) = 0 [pid 669] <... mount resumed>) = 0 [pid 668] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 669] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 668] <... open resumed>) = 4 [pid 669] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 668] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 669] <... mmap resumed>) = 0x20000000 [pid 667] <... close resumed>) = 0 [pid 667] chdir("./file0" [pid 669] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 668] <... mmap resumed>) = 0x20000000 [pid 669] <... openat resumed>) = 5 [pid 668] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 669] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 668] <... openat resumed>) = 5 [pid 669] exit_group(0) = ? [pid 668] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 667] <... chdir resumed>) = 0 [pid 667] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 669] +++ exited with 0 +++ [pid 668] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=669, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 668] exit_group(0) = ? [pid 668] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=668, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 667] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 667] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 667] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 670] <... write resumed>) = 1048576 [pid 671] <... write resumed>) = 1048576 [pid 667] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 667] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 667] exit_group(0) = ? [pid 298] <... restart_syscall resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] <... ioctl resumed>) = 0 [pid 299] <... openat resumed>) = 3 [pid 298] close(3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] <... close resumed>) = 0 [pid 299] <... ioctl resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] close(3) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 673 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 674 [pid 670] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 670] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 670] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 670] ioctl(4, LOOP_CLR_FD) = 0 [pid 667] +++ exited with 0 +++ [pid 671] munmap(0x7f1ddd1fa000, 138412032 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=667, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 671] <... munmap resumed>) = 0 ./strace-static-x86_64: Process 673 attached [pid 671] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 673] set_robust_list(0x55555671f660, 24 [pid 671] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 673] <... set_robust_list resumed>) = 0 [pid 671] ioctl(4, LOOP_CLR_FD) = 0 [pid 673] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 297] <... restart_syscall resumed>) = 0 [pid 673] <... prctl resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 673] setpgid(0, 0 [pid 297] <... openat resumed>) = 3 [pid 673] <... setpgid resumed>) = 0 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3 [pid 673] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 673] <... openat resumed>) = 3 [pid 670] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 670] close(4 [pid 673] write(3, "1000", 4 [pid 671] ioctl(4, LOOP_SET_FD, 3 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 675 [pid 673] <... write resumed>) = 4 [pid 671] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 673] close(3 [pid 671] close(4 [pid 670] <... close resumed>) = 0 [pid 673] <... close resumed>) = 0 [pid 671] <... close resumed>) = 0 [pid 671] close(3 [pid 673] write(1, "executing program\n", 18executing program [pid 670] close(3 [pid 671] <... close resumed>) = 0 [pid 673] <... write resumed>) = 18 ./strace-static-x86_64: Process 674 attached [pid 674] set_robust_list(0x55555671f660, 24) = 0 [pid 674] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 674] setpgid(0, 0) = 0 executing program [pid 674] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 674] write(3, "1000", 4) = 4 [pid 674] close(3) = 0 [pid 674] write(1, "executing program\n", 18 [pid 670] <... close resumed>) = 0 [pid 674] <... write resumed>) = 18 [pid 674] memfd_create("syzkaller", 0 [pid 670] chdir("./file0" [pid 674] <... memfd_create resumed>) = 3 [pid 670] <... chdir resumed>) = 0 [pid 670] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 674] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 670] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 670] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 673] memfd_create("syzkaller", 0 [pid 671] chdir("./file0" [pid 673] <... memfd_create resumed>) = 3 [pid 671] <... chdir resumed>) = 0 [pid 673] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 671] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 673] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 670] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 671] <... open resumed>) = 3 [pid 670] <... mmap resumed>) = 0x20000000 [pid 670] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 670] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 670] exit_group(0) = ? [pid 673] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 671] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 675 attached [pid 671] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 675] set_robust_list(0x55555671f660, 24 [pid 671] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 675] <... set_robust_list resumed>) = 0 [pid 670] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=670, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 671] <... mmap resumed>) = 0x20000000 [pid 675] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 671] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 675] <... prctl resumed>) = 0 [pid 671] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 675] setpgid(0, 0 [pid 671] exit_group(0 [pid 675] <... setpgid resumed>) = 0 [pid 671] <... exit_group resumed>) = ? [pid 671] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=671, si_uid=0, si_status=0, si_utime=1, si_stime=2} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 675] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 674] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 676 [pid 674] <... write resumed>) = 1048576 [pid 674] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 674] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 674] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 674] ioctl(4, LOOP_CLR_FD) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 675] <... openat resumed>) = 3 [pid 675] write(3, "1000", 4) = 4 [pid 675] close(3 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 675] <... close resumed>) = 0 executing program [pid 675] write(1, "executing program\n", 18 [pid 295] <... openat resumed>) = 3 [pid 675] <... write resumed>) = 18 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 675] memfd_create("syzkaller", 0 [pid 295] close(3 [pid 675] <... memfd_create resumed>) = 3 [pid 295] <... close resumed>) = 0 [pid 675] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 676 attached [pid 676] set_robust_list(0x55555671f660, 24 [pid 675] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 677 [pid 676] <... set_robust_list resumed>) = 0 [pid 676] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 674] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 674] close(4) = 0 [pid 674] close(3) = 0 [pid 676] <... prctl resumed>) = 0 [pid 676] setpgid(0, 0) = 0 [pid 676] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 676] write(3, "1000", 4) = 4 [pid 676] close(3) = 0 [pid 676] write(1, "executing program\n", 18executing program ) = 18 [pid 675] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 676] memfd_create("syzkaller", 0) = 3 [pid 676] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 674] chdir("./file0") = 0 [pid 674] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 673] <... write resumed>) = 1048576 [pid 674] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 673] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 677 attached ) = 0 [pid 677] set_robust_list(0x55555671f660, 24) = 0 [pid 674] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 677] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 674] <... open resumed>) = 4 [pid 675] <... write resumed>) = 1048576 [pid 673] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 673] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 673] ioctl(4, LOOP_CLR_FD) = 0 [pid 677] <... prctl resumed>) = 0 [pid 674] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 677] setpgid(0, 0 [pid 675] munmap(0x7f1ddd1fa000, 138412032 [pid 673] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 673] close(4) = 0 [pid 673] close(3 [pid 677] <... setpgid resumed>) = 0 [pid 677] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 674] <... mmap resumed>) = 0x20000000 [pid 677] <... openat resumed>) = 3 [pid 677] write(3, "1000", 4) = 4 [pid 677] close(3) = 0 [pid 677] write(1, "executing program\n", 18executing program ) = 18 [pid 677] memfd_create("syzkaller", 0) = 3 [pid 677] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 673] <... close resumed>) = 0 [pid 675] <... munmap resumed>) = 0 [pid 677] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 675] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 673] chdir("./file0") = 0 [pid 675] <... openat resumed>) = 4 [pid 673] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 674] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 673] <... open resumed>) = 3 [pid 675] ioctl(4, LOOP_SET_FD, 3 [pid 673] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 675] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 673] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 674] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 673] <... open resumed>) = 4 [pid 675] ioctl(4, LOOP_CLR_FD [pid 673] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 675] <... ioctl resumed>) = 0 [pid 674] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 674] exit_group(0) = ? [pid 673] <... mmap resumed>) = 0x20000000 [pid 674] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=674, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 678 [pid 673] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 678 attached ) = 5 [pid 678] set_robust_list(0x55555671f660, 24 [pid 673] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 678] <... set_robust_list resumed>) = 0 [pid 673] exit_group(0) = ? [pid 676] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 673] +++ exited with 0 +++ [pid 675] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 678] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=673, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 675] close(4 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 675] <... close resumed>) = 0 [pid 678] <... prctl resumed>) = 0 [pid 675] close(3) = 0 [pid 678] setpgid(0, 0 [pid 675] chdir("./file0" [pid 676] <... write resumed>) = 1048576 [pid 676] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 676] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 677] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 678] <... setpgid resumed>) = 0 [pid 675] <... chdir resumed>) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 679 [pid 678] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 675] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 678] <... openat resumed>) = 3 [pid 676] <... openat resumed>) = 4 [pid 676] ioctl(4, LOOP_SET_FD, 3 [pid 678] write(3, "1000", 4 [pid 675] <... open resumed>) = 3 [pid 678] <... write resumed>) = 4 [pid 675] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 678] close(3 [pid 675] <... mount resumed>) = 0 [pid 678] <... close resumed>) = 0 [pid 675] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 678] write(1, "executing program\n", 18executing program [pid 675] <... open resumed>) = 4 [pid 678] <... write resumed>) = 18 [pid 678] memfd_create("syzkaller", 0 [pid 675] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 678] <... memfd_create resumed>) = 3 [pid 676] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 676] ioctl(4, LOOP_CLR_FD) = 0 [pid 675] <... mmap resumed>) = 0x20000000 [pid 678] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 675] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 678] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 675] <... openat resumed>) = 5 [pid 675] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 675] exit_group(0 [pid 676] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 676] close(4) = 0 [pid 676] close(3) = 0 [pid 678] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 675] <... exit_group resumed>) = ? ./strace-static-x86_64: Process 679 attached [pid 679] set_robust_list(0x55555671f660, 24) = 0 [pid 675] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=675, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 679] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 679] setpgid(0, 0) = 0 [pid 679] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 676] chdir("./file0") = 0 [pid 676] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 679] write(3, "1000", 4) = 4 [pid 679] close(3) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 679] write(1, "executing program\n", 18 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FDexecuting program ) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 679] <... write resumed>) = 18 [pid 679] memfd_create("syzkaller", 0) = 3 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 680 [pid 679] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 676] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 676] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 676] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 676] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 677] <... write resumed>) = 1048576 [pid 676] <... openat resumed>) = 5 [pid 678] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 680 attached [pid 678] munmap(0x7f1ddd1fa000, 138412032 [pid 677] munmap(0x7f1ddd1fa000, 138412032 [pid 676] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 677] <... munmap resumed>) = 0 [pid 676] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 678] <... munmap resumed>) = 0 [pid 677] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 680] set_robust_list(0x55555671f660, 24 [pid 676] exit_group(0) = ? [pid 680] <... set_robust_list resumed>) = 0 [pid 677] <... openat resumed>) = 4 [pid 678] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 677] ioctl(4, LOOP_SET_FD, 3 [pid 680] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 678] <... openat resumed>) = 4 [pid 677] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 680] <... prctl resumed>) = 0 [pid 678] ioctl(4, LOOP_SET_FD, 3 [pid 677] ioctl(4, LOOP_CLR_FD) = 0 [pid 680] setpgid(0, 0 [pid 678] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 680] <... setpgid resumed>) = 0 [pid 678] ioctl(4, LOOP_CLR_FD [pid 676] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=676, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 678] <... ioctl resumed>) = 0 [pid 680] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 677] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 681 [pid 677] close(4 [pid 680] <... openat resumed>) = 3 [pid 677] <... close resumed>) = 0 [pid 680] write(3, "1000", 4 [pid 677] close(3 [pid 680] <... write resumed>) = 4 executing program [pid 677] <... close resumed>) = 0 [pid 680] close(3 [pid 677] chdir("./file0" [pid 680] <... close resumed>) = 0 [pid 678] ioctl(4, LOOP_SET_FD, 3 [pid 680] write(1, "executing program\n", 18 [pid 677] <... chdir resumed>) = 0 [pid 678] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 680] <... write resumed>) = 18 [pid 678] close(4 [pid 677] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 680] memfd_create("syzkaller", 0 [pid 678] <... close resumed>) = 0 [pid 677] <... open resumed>) = 3 [pid 678] close(3 [pid 680] <... memfd_create resumed>) = 3 [pid 679] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 680] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 677] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 680] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 677] <... mount resumed>) = 0 [pid 677] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 679] <... write resumed>) = 1048576 [pid 679] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 679] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 679] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 679] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 681 attached [pid 681] set_robust_list(0x55555671f660, 24) = 0 [pid 681] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 677] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 678] <... close resumed>) = 0 [pid 679] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 679] close(4) = 0 [pid 677] <... mmap resumed>) = 0x20000000 [pid 678] chdir("./file0" [pid 679] close(3) = 0 [pid 681] <... prctl resumed>) = 0 [pid 681] setpgid(0, 0) = 0 [pid 677] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 678] <... chdir resumed>) = 0 [pid 678] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 677] <... openat resumed>) = 5 [pid 681] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 678] <... open resumed>) = 3 [pid 677] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 678] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 677] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 678] <... mount resumed>) = 0 [pid 678] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 677] exit_group(0 [pid 678] <... open resumed>) = 4 [pid 677] <... exit_group resumed>) = ? [pid 678] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 681] <... openat resumed>) = 3 [pid 681] write(3, "1000", 4) = 4 [pid 681] close(3) = 0 [pid 681] write(1, "executing program\n", 18executing program ) = 18 [pid 677] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=677, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 681] memfd_create("syzkaller", 0 [pid 679] chdir("./file0" [pid 681] <... memfd_create resumed>) = 3 [pid 678] <... mmap resumed>) = 0x20000000 [pid 679] <... chdir resumed>) = 0 [pid 681] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 679] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 681] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 680] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 678] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 678] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 678] exit_group(0) = ? [pid 678] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=678, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 679] <... open resumed>) = 3 [pid 679] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 679] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 679] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 295] <... restart_syscall resumed>) = 0 [pid 679] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 679] <... openat resumed>) = 5 [pid 679] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 682 [pid 679] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 679] exit_group(0) = ? [pid 679] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=679, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 683 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 684 [pid 681] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 683 attached [pid 683] set_robust_list(0x55555671f660, 24) = 0 [pid 683] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 683] setpgid(0, 0) = 0 [pid 683] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 682 attached ./strace-static-x86_64: Process 684 attached [pid 680] <... write resumed>) = 1048576 [pid 684] set_robust_list(0x55555671f660, 24 [pid 682] set_robust_list(0x55555671f660, 24 [pid 680] munmap(0x7f1ddd1fa000, 138412032 [pid 684] <... set_robust_list resumed>) = 0 [pid 682] <... set_robust_list resumed>) = 0 [pid 683] <... openat resumed>) = 3 [pid 680] <... munmap resumed>) = 0 [pid 682] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 684] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 682] <... prctl resumed>) = 0 [pid 680] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 684] <... prctl resumed>) = 0 [pid 682] setpgid(0, 0 [pid 680] <... openat resumed>) = 4 [pid 682] <... setpgid resumed>) = 0 [pid 684] setpgid(0, 0 [pid 680] ioctl(4, LOOP_SET_FD, 3 [pid 684] <... setpgid resumed>) = 0 [pid 682] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 680] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program executing program [pid 684] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 682] <... openat resumed>) = 3 [pid 680] ioctl(4, LOOP_CLR_FD [pid 684] <... openat resumed>) = 3 [pid 682] write(3, "1000", 4 [pid 680] <... ioctl resumed>) = 0 [pid 684] write(3, "1000", 4 [pid 682] <... write resumed>) = 4 [pid 684] <... write resumed>) = 4 [pid 682] close(3 [pid 684] close(3 [pid 682] <... close resumed>) = 0 [pid 684] <... close resumed>) = 0 [pid 682] write(1, "executing program\n", 18 [pid 684] write(1, "executing program\n", 18 [pid 682] <... write resumed>) = 18 [pid 684] <... write resumed>) = 18 [pid 682] memfd_create("syzkaller", 0 [pid 684] memfd_create("syzkaller", 0 [pid 682] <... memfd_create resumed>) = 3 [pid 684] <... memfd_create resumed>) = 3 [pid 682] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 684] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 682] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 683] write(3, "1000", 4) = 4 [pid 683] close(3) = 0 [pid 683] write(1, "executing program\n", 18executing program ) = 18 [pid 683] memfd_create("syzkaller", 0) = 3 [pid 683] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 684] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 680] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 680] close(4) = 0 [pid 680] close(3 [pid 681] <... write resumed>) = 1048576 [pid 681] munmap(0x7f1ddd1fa000, 138412032 [pid 680] <... close resumed>) = 0 [pid 680] chdir("./file0" [pid 681] <... munmap resumed>) = 0 [pid 683] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 682] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 680] <... chdir resumed>) = 0 [pid 680] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 681] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 680] <... open resumed>) = 3 [pid 680] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 681] ioctl(4, LOOP_SET_FD, 3 [pid 680] <... mount resumed>) = 0 [pid 680] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 681] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 680] <... open resumed>) = 4 [pid 680] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 681] ioctl(4, LOOP_CLR_FD) = 0 [pid 680] <... mmap resumed>) = 0x20000000 [pid 680] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 680] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 680] exit_group(0) = ? [pid 681] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 681] close(4) = 0 [pid 681] close(3 [pid 680] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=680, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 685 [pid 682] <... write resumed>) = 1048576 [pid 681] <... close resumed>) = 0 [pid 684] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 685 attached [pid 682] munmap(0x7f1ddd1fa000, 138412032 [pid 684] munmap(0x7f1ddd1fa000, 138412032 [pid 683] <... write resumed>) = 1048576 [pid 681] chdir("./file0" [pid 684] <... munmap resumed>) = 0 [pid 682] <... munmap resumed>) = 0 [pid 684] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 685] set_robust_list(0x55555671f660, 24 [pid 683] munmap(0x7f1ddd1fa000, 138412032 [pid 682] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 684] <... openat resumed>) = 4 [pid 685] <... set_robust_list resumed>) = 0 [pid 684] ioctl(4, LOOP_SET_FD, 3 [pid 682] <... openat resumed>) = 4 [pid 685] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 682] ioctl(4, LOOP_SET_FD, 3 [pid 684] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 685] <... prctl resumed>) = 0 [pid 684] ioctl(4, LOOP_CLR_FD [pid 682] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 685] setpgid(0, 0 [pid 684] <... ioctl resumed>) = 0 [pid 683] <... munmap resumed>) = 0 [pid 682] ioctl(4, LOOP_CLR_FD [pid 685] <... setpgid resumed>) = 0 [pid 682] <... ioctl resumed>) = 0 [pid 683] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 685] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 683] <... openat resumed>) = 4 [pid 685] write(3, "1000", 4executing program ) = 4 [pid 683] ioctl(4, LOOP_SET_FD, 3 [pid 685] close(3) = 0 [pid 683] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 685] write(1, "executing program\n", 18) = 18 [pid 683] ioctl(4, LOOP_CLR_FD [pid 685] memfd_create("syzkaller", 0 [pid 683] <... ioctl resumed>) = 0 [pid 685] <... memfd_create resumed>) = 3 [pid 685] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 684] ioctl(4, LOOP_SET_FD, 3 [pid 685] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 684] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 682] ioctl(4, LOOP_SET_FD, 3 [pid 681] <... chdir resumed>) = 0 [pid 681] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 684] close(4 [pid 682] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 682] close(4 [pid 684] <... close resumed>) = 0 [pid 682] <... close resumed>) = 0 [pid 684] close(3 [pid 681] <... open resumed>) = 3 [pid 681] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 681] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 681] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 682] close(3 [pid 681] <... mmap resumed>) = 0x20000000 [pid 681] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 681] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 681] exit_group(0) = ? [pid 684] <... close resumed>) = 0 [pid 681] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=681, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 682] <... close resumed>) = 0 [pid 684] chdir("./file0" [pid 683] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 683] close(4 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 686 [pid 683] <... close resumed>) = 0 [pid 683] close(3 [pid 682] chdir("./file0" [pid 684] <... chdir resumed>) = 0 [pid 684] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 682] <... chdir resumed>) = 0 [pid 682] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 684] <... open resumed>) = 3 [pid 682] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 684] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 682] <... mount resumed>) = 0 [pid 684] <... mount resumed>) = 0 [pid 682] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 684] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 682] <... open resumed>) = 4 [pid 684] <... open resumed>) = 4 [pid 682] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 684] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 682] <... mmap resumed>) = 0x20000000 [pid 684] <... mmap resumed>) = 0x20000000 [pid 682] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 684] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 682] <... openat resumed>) = 5 [pid 684] <... openat resumed>) = 5 [pid 682] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 684] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 682] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 684] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 682] exit_group(0 [pid 684] exit_group(0 [pid 682] <... exit_group resumed>) = ? [pid 684] <... exit_group resumed>) = ? [pid 683] <... close resumed>) = 0 [pid 682] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=682, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 683] chdir("./file0") = 0 [pid 683] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 684] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=684, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 685] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 683] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 683] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 686 attached [pid 685] <... write resumed>) = 1048576 [pid 686] set_robust_list(0x55555671f660, 24 [pid 685] munmap(0x7f1ddd1fa000, 138412032 [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 686] <... set_robust_list resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 686] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 685] <... munmap resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 686] <... prctl resumed>) = 0 [pid 685] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 298] <... ioctl resumed>) = 0 [pid 686] setpgid(0, 0 [pid 685] <... openat resumed>) = 4 [pid 298] close(3 [pid 295] <... openat resumed>) = 3 [pid 686] <... setpgid resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 686] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 685] ioctl(4, LOOP_SET_FD, 3 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... ioctl resumed>) = 0 [pid 686] <... openat resumed>) = 3 [pid 685] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 295] close(3 [pid 686] write(3, "1000", 4 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 687 [pid 686] <... write resumed>) = 4 [pid 685] ioctl(4, LOOP_CLR_FD [pid 295] <... close resumed>) = 0 [pid 683] <... open resumed>) = 4 [pid 683] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 683] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 683] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 683] exit_group(0) = ? [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 688 [pid 683] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=683, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 688 attached [pid 688] set_robust_list(0x55555671f660, 24) = 0 [pid 688] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 686] close(3 [pid 685] <... ioctl resumed>) = 0 executing program [pid 686] <... close resumed>) = 0 [pid 686] write(1, "executing program\n", 18) = 18 [pid 686] memfd_create("syzkaller", 0) = 3 [pid 686] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 686] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 689 [pid 688] setpgid(0, 0) = 0 [pid 688] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 688] write(3, "1000", 4) = 4 [pid 688] close(3) = 0 [pid 688] write(1, "executing program\n", 18executing program ) = 18 [pid 688] memfd_create("syzkaller", 0) = 3 [pid 688] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 685] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 685] close(4) = 0 [pid 685] close(3./strace-static-x86_64: Process 689 attached ) = 0 [pid 689] set_robust_list(0x55555671f660, 24) = 0 [pid 689] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 689] setpgid(0, 0) = 0 [pid 689] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 689] write(3, "1000", 4) = 4 [pid 689] close(3) = 0 [pid 689] write(1, "executing program\n", 18executing program ) = 18 [pid 689] memfd_create("syzkaller", 0) = 3 [pid 689] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 685] chdir("./file0"./strace-static-x86_64: Process 687 attached [pid 686] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 687] set_robust_list(0x55555671f660, 24 [pid 685] <... chdir resumed>) = 0 [pid 687] <... set_robust_list resumed>) = 0 [pid 685] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 687] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 685] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 687] <... prctl resumed>) = 0 [pid 685] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 687] setpgid(0, 0 [pid 685] <... open resumed>) = 4 [pid 687] <... setpgid resumed>) = 0 [pid 685] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 687] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 685] <... mmap resumed>) = 0x20000000 [pid 687] <... openat resumed>) = 3 [pid 685] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 688] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 686] <... write resumed>) = 1048576 [pid 687] write(3, "1000", 4 [pid 686] munmap(0x7f1ddd1fa000, 138412032 [pid 685] <... openat resumed>) = 5 [pid 687] <... write resumed>) = 4 [pid 687] close(3 [pid 685] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 687] <... close resumed>) = 0 [pid 685] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 687] write(1, "executing program\n", 18executing program ) = 18 [pid 686] <... munmap resumed>) = 0 [pid 685] exit_group(0 [pid 687] memfd_create("syzkaller", 0 [pid 686] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 685] <... exit_group resumed>) = ? [pid 687] <... memfd_create resumed>) = 3 [pid 685] +++ exited with 0 +++ [pid 687] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=685, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 687] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 686] <... openat resumed>) = 4 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 689] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 686] ioctl(4, LOOP_SET_FD, 3 [pid 297] <... openat resumed>) = 3 [pid 686] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 297] ioctl(3, LOOP_CLR_FD [pid 686] ioctl(4, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 686] <... ioctl resumed>) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 690 [pid 688] <... write resumed>) = 1048576 [pid 688] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 688] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 688] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 688] ioctl(4, LOOP_CLR_FD) = 0 [pid 687] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 686] ioctl(4, LOOP_SET_FD, 3 [pid 688] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 688] close(4) = 0 [pid 688] close(3 [pid 686] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 686] close(4) = 0 [pid 686] close(3./strace-static-x86_64: Process 690 attached [pid 690] set_robust_list(0x55555671f660, 24) = 0 [pid 690] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 690] setpgid(0, 0) = 0 [pid 690] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 686] <... close resumed>) = 0 [pid 688] <... close resumed>) = 0 [pid 690] <... openat resumed>) = 3 [pid 688] chdir("./file0") = 0 [pid 687] <... write resumed>) = 1048576 [pid 686] chdir("./file0" [pid 687] munmap(0x7f1ddd1fa000, 138412032 [pid 686] <... chdir resumed>) = 0 [pid 686] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 688] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 686] <... open resumed>) = 3 [pid 687] <... munmap resumed>) = 0 [pid 686] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 687] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 686] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 687] <... openat resumed>) = 4 [pid 686] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 690] write(3, "1000", 4) = 4 [pid 689] <... write resumed>) = 1048576 [pid 690] close(3 [pid 686] <... mmap resumed>) = 0x20000000 [pid 687] ioctl(4, LOOP_SET_FD, 3 [pid 690] <... close resumed>) = 0 [pid 690] write(1, "executing program\n", 18executing program ) = 18 [pid 690] memfd_create("syzkaller", 0) = 3 [pid 689] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 688] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 690] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 688] <... mount resumed>) = 0 [pid 688] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 686] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 687] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 687] ioctl(4, LOOP_CLR_FD [pid 686] <... openat resumed>) = 5 [pid 687] <... ioctl resumed>) = 0 [pid 686] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 686] exit_group(0) = ? [pid 688] <... open resumed>) = 4 [pid 689] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 688] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 689] <... openat resumed>) = 4 [pid 686] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=686, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 687] ioctl(4, LOOP_SET_FD, 3 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 687] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 687] close(4) = 0 [pid 687] close(3 [pid 688] <... mmap resumed>) = 0x20000000 [pid 689] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 689] ioctl(4, LOOP_CLR_FD) = 0 [pid 687] <... close resumed>) = 0 [pid 688] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 689] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 689] close(4) = 0 [pid 689] close(3 [pid 687] chdir("./file0" [pid 689] <... close resumed>) = 0 [pid 688] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 687] <... chdir resumed>) = 0 [pid 687] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 688] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 688] exit_group(0 [pid 296] <... restart_syscall resumed>) = 0 [pid 687] <... open resumed>) = 3 [pid 687] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 687] <... mount resumed>) = 0 [pid 296] <... openat resumed>) = 3 [pid 687] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3 [pid 687] <... open resumed>) = 4 [pid 296] <... close resumed>) = 0 [pid 687] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 691 [pid 687] <... mmap resumed>) = 0x20000000 [pid 687] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 688] <... exit_group resumed>) = ? [pid 687] <... openat resumed>) = 5 [pid 687] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 688] +++ exited with 0 +++ [pid 687] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 687] exit_group(0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=688, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 687] <... exit_group resumed>) = ? [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 687] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=687, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 690] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 689] chdir("./file0") = 0 [pid 689] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 689] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 689] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 295] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 691 attached [pid 691] set_robust_list(0x55555671f660, 24 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 691] <... set_robust_list resumed>) = 0 [pid 295] <... openat resumed>) = 3 [pid 691] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 295] ioctl(3, LOOP_CLR_FD [pid 691] <... prctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 691] setpgid(0, 0 [pid 295] close(3 [pid 691] <... setpgid resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 691] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 691] <... openat resumed>) = 3 [pid 689] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 691] write(3, "1000", 4 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 692 [pid 689] <... mmap resumed>) = 0x20000000 [pid 689] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 693 [pid 689] <... openat resumed>) = 5 [pid 691] <... write resumed>) = 4 [pid 689] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 689] exit_group(0) = ? [pid 689] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=689, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 691] close(3) = 0 [pid 691] write(1, "executing program\n", 18executing program ) = 18 [pid 691] memfd_create("syzkaller", 0) = 3 [pid 691] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 694 ./strace-static-x86_64: Process 693 attached [pid 693] set_robust_list(0x55555671f660, 24) = 0 [pid 693] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 691] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 693] setpgid(0, 0) = 0 [pid 693] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 693] write(3, "1000", 4) = 4 [pid 693] close(3) = 0 [pid 693] write(1, "executing program\n", 18executing program ) = 18 [pid 693] memfd_create("syzkaller", 0) = 3 [pid 693] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 694 attached [pid 694] set_robust_list(0x55555671f660, 24) = 0 [pid 694] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 694] setpgid(0, 0) = 0 [pid 694] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 694] write(3, "1000", 4) = 4 [pid 694] close(3) = 0 [pid 694] write(1, "executing program\n", 18executing program ) = 18 [pid 694] memfd_create("syzkaller", 0) = 3 [pid 694] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 691] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 692 attached [pid 691] munmap(0x7f1ddd1fa000, 138412032 [pid 692] set_robust_list(0x55555671f660, 24 [pid 690] <... write resumed>) = 1048576 [pid 691] <... munmap resumed>) = 0 [pid 692] <... set_robust_list resumed>) = 0 [pid 691] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 690] munmap(0x7f1ddd1fa000, 138412032 [pid 692] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 691] <... openat resumed>) = 4 [pid 692] <... prctl resumed>) = 0 [pid 691] ioctl(4, LOOP_SET_FD, 3 [pid 692] setpgid(0, 0 [pid 691] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 692] <... setpgid resumed>) = 0 [pid 691] ioctl(4, LOOP_CLR_FD [pid 692] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 691] <... ioctl resumed>) = 0 executing program [pid 692] <... openat resumed>) = 3 [pid 692] write(3, "1000", 4) = 4 [pid 692] close(3) = 0 [pid 692] write(1, "executing program\n", 18) = 18 [pid 690] <... munmap resumed>) = 0 [pid 692] memfd_create("syzkaller", 0) = 3 [pid 692] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 690] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 694] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 693] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 692] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 690] <... openat resumed>) = 4 [pid 690] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 690] ioctl(4, LOOP_CLR_FD) = 0 [pid 690] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 690] close(4) = 0 [pid 690] close(3) = 0 [pid 690] chdir("./file0") = 0 [pid 690] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 690] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 692] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 691] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 691] close(4) = 0 [pid 691] close(3 [pid 690] <... mount resumed>) = 0 [pid 690] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 690] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 690] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 690] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 691] <... close resumed>) = 0 [pid 691] chdir("./file0") = 0 [pid 691] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 690] exit_group(0) = ? [pid 691] <... open resumed>) = 3 [pid 691] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 691] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 691] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 691] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 691] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 691] exit_group(0) = ? [pid 690] +++ exited with 0 +++ [pid 691] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=690, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=691, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 693] <... write resumed>) = 1048576 [pid 692] <... write resumed>) = 1048576 [pid 693] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 693] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 693] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 693] ioctl(4, LOOP_CLR_FD) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 296] close(3 [pid 297] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 696 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 695 [pid 693] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 693] close(4) = 0 [pid 693] close(3) = 0 [pid 694] <... write resumed>) = 1048576 [pid 694] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 694] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 694] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 694] ioctl(4, LOOP_CLR_FD) = 0 [pid 693] chdir("./file0") = 0 [pid 693] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 ./strace-static-x86_64: Process 696 attached [pid 694] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 694] close(4) = 0 [pid 694] close(3 [pid 696] set_robust_list(0x55555671f660, 24) = 0 [pid 692] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 695 attached [pid 696] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 692] <... munmap resumed>) = 0 [pid 695] set_robust_list(0x55555671f660, 24 [pid 692] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 695] <... set_robust_list resumed>) = 0 [pid 692] <... openat resumed>) = 4 [pid 695] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 692] ioctl(4, LOOP_SET_FD, 3 [pid 695] <... prctl resumed>) = 0 [pid 692] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 695] setpgid(0, 0 [pid 692] ioctl(4, LOOP_CLR_FD [pid 695] <... setpgid resumed>) = 0 [pid 692] <... ioctl resumed>) = 0 [pid 695] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 693] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 695] <... openat resumed>) = 3 [pid 695] write(3, "1000", 4) = 4 [pid 695] close(3) = 0 [pid 695] write(1, "executing program\n", 18executing program ) = 18 [pid 695] memfd_create("syzkaller", 0) = 3 [pid 695] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 693] <... mount resumed>) = 0 [pid 696] <... prctl resumed>) = 0 [pid 696] setpgid(0, 0) = 0 [pid 696] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 693] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 696] <... openat resumed>) = 3 [pid 696] write(3, "1000", 4 [pid 693] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 696] <... write resumed>) = 4 [pid 696] close(3) = 0 [pid 693] <... mmap resumed>) = 0x20000000 [pid 696] write(1, "executing program\n", 18) = 18 [pid 696] memfd_create("syzkaller", 0) = 3 [pid 694] <... close resumed>) = 0 [pid 696] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 695] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 692] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 692] close(4) = 0 [pid 692] close(3 [pid 693] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 693] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 693] exit_group(0) = ? [pid 693] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=693, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 692] <... close resumed>) = 0 [pid 692] chdir("./file0") = 0 [pid 692] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 692] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 692] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 694] chdir("./file0") = 0 [pid 694] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 692] <... open resumed>) = 4 [pid 692] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 694] <... open resumed>) = 3 [pid 692] <... mmap resumed>) = 0x20000000 [pid 692] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 694] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 692] <... openat resumed>) = 5 [pid 696] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 695] <... write resumed>) = 1048576 [pid 692] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 298] <... restart_syscall resumed>) = 0 [pid 692] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 694] <... mount resumed>) = 0 [pid 692] exit_group(0) = ? [pid 694] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 694] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 692] +++ exited with 0 +++ [pid 298] <... openat resumed>) = 3 [pid 694] <... mmap resumed>) = 0x20000000 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=692, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 298] close(3 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 298] <... close resumed>) = 0 [pid 694] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 694] <... openat resumed>) = 5 [pid 694] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 697 [pid 694] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 694] exit_group(0) = ? [pid 694] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=694, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 696] <... write resumed>) = 1048576 [pid 695] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 696] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 695] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 299] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 697 attached [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 295] close(3 [pid 299] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 698 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 699 [pid 695] <... openat resumed>) = 4 [pid 695] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 695] ioctl(4, LOOP_CLR_FD) = 0 [pid 696] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 696] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 696] ioctl(4, LOOP_CLR_FD) = 0 [pid 695] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 695] close(4) = 0 [pid 695] close(3) = 0 [pid 696] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 696] close(4) = 0 [pid 696] close(3) = 0 ./strace-static-x86_64: Process 699 attached [pid 699] set_robust_list(0x55555671f660, 24) = 0 [pid 699] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 699] setpgid(0, 0) = 0 [pid 697] set_robust_list(0x55555671f660, 24./strace-static-x86_64: Process 698 attached ) = 0 [pid 698] set_robust_list(0x55555671f660, 24 [pid 697] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 698] <... set_robust_list resumed>) = 0 [pid 697] <... prctl resumed>) = 0 [pid 698] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 697] setpgid(0, 0 [pid 698] <... prctl resumed>) = 0 [pid 697] <... setpgid resumed>) = 0 [pid 698] setpgid(0, 0) = 0 [pid 697] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 699] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 698] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 697] <... openat resumed>) = 3 [pid 698] <... openat resumed>) = 3 [pid 697] write(3, "1000", 4 [pid 698] write(3, "1000", 4 [pid 697] <... write resumed>) = 4 [pid 698] <... write resumed>) = 4 [pid 697] close(3executing program executing program [pid 698] close(3 [pid 697] <... close resumed>) = 0 [pid 698] <... close resumed>) = 0 [pid 697] write(1, "executing program\n", 18 [pid 698] write(1, "executing program\n", 18 [pid 697] <... write resumed>) = 18 [pid 698] <... write resumed>) = 18 [pid 698] memfd_create("syzkaller", 0 [pid 697] memfd_create("syzkaller", 0 [pid 698] <... memfd_create resumed>) = 3 [pid 698] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 697] <... memfd_create resumed>) = 3 [pid 698] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 697] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 699] <... openat resumed>) = 3 [pid 699] write(3, "1000", 4) = 4 [pid 699] close(3) = 0 [pid 695] chdir("./file0") = 0 executing program [pid 699] write(1, "executing program\n", 18) = 18 [pid 695] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 699] memfd_create("syzkaller", 0 [pid 695] <... open resumed>) = 3 [pid 696] chdir("./file0") = 0 [pid 696] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 699] <... memfd_create resumed>) = 3 [pid 696] <... open resumed>) = 3 [pid 699] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 695] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 696] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 696] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 695] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 696] <... open resumed>) = 4 [pid 695] <... open resumed>) = 4 [pid 695] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 696] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 698] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 697] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 695] <... mmap resumed>) = 0x20000000 [pid 697] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 696] <... mmap resumed>) = 0x20000000 [pid 695] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 696] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 695] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 696] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 695] exit_group(0 [pid 696] exit_group(0 [pid 695] <... exit_group resumed>) = ? [pid 696] <... exit_group resumed>) = ? [pid 695] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=695, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 698] <... write resumed>) = 1048576 [pid 696] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=696, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 699] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 697] <... write resumed>) = 1048576 [pid 699] <... write resumed>) = 1048576 [pid 699] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 699] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 699] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 699] ioctl(4, LOOP_CLR_FD) = 0 [pid 698] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 698] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 296] close(3 [pid 297] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 700 attached [pid 697] munmap(0x7f1ddd1fa000, 138412032 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 700 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 701 [pid 700] set_robust_list(0x55555671f660, 24 [pid 697] <... munmap resumed>) = 0 [pid 700] <... set_robust_list resumed>) = 0 [pid 697] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 700] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 697] <... openat resumed>) = 4 [pid 700] <... prctl resumed>) = 0 [pid 697] ioctl(4, LOOP_SET_FD, 3 [pid 700] setpgid(0, 0 [pid 697] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 700] <... setpgid resumed>) = 0 [pid 697] ioctl(4, LOOP_CLR_FD [pid 700] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 697] <... ioctl resumed>) = 0 [pid 700] <... openat resumed>) = 3 [pid 699] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 699] close(4) = 0 [pid 699] close(3 [pid 700] write(3, "1000", 4 [pid 697] ioctl(4, LOOP_SET_FD, 3 [pid 700] <... write resumed>) = 4 [pid 697] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 700] close(3 [pid 697] close(4./strace-static-x86_64: Process 701 attached [pid 700] <... close resumed>) = 0 executing program [pid 701] set_robust_list(0x55555671f660, 24 [pid 700] write(1, "executing program\n", 18 [pid 697] <... close resumed>) = 0 [pid 701] <... set_robust_list resumed>) = 0 [pid 700] <... write resumed>) = 18 [pid 697] close(3 [pid 698] <... openat resumed>) = 4 [pid 698] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 698] ioctl(4, LOOP_CLR_FD) = 0 [pid 697] <... close resumed>) = 0 [pid 700] memfd_create("syzkaller", 0 [pid 697] chdir("./file0" [pid 701] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 700] <... memfd_create resumed>) = 3 [pid 701] <... prctl resumed>) = 0 [pid 697] <... chdir resumed>) = 0 [pid 700] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 701] setpgid(0, 0 [pid 700] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 697] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 698] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 698] close(4) = 0 [pid 698] close(3) = 0 [pid 699] <... close resumed>) = 0 [pid 699] chdir("./file0") = 0 [pid 699] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 698] chdir("./file0") = 0 [pid 698] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 700] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 699] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 701] <... setpgid resumed>) = 0 [pid 697] <... open resumed>) = 3 [pid 699] <... mount resumed>) = 0 [pid 699] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 698] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 699] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 698] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 698] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 699] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 699] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 698] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 699] exit_group(0 [pid 698] <... openat resumed>) = 5 [pid 697] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 701] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 699] <... exit_group resumed>) = ? [pid 697] <... mount resumed>) = 0 [pid 701] <... openat resumed>) = 3 [pid 697] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 701] write(3, "1000", 4) = 4 [pid 697] <... open resumed>) = 4 [pid 701] close(3) = 0 [pid 697] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 701] write(1, "executing program\n", 18 [pid 698] mount(NULL, 0x20002ac0, NULL, 0, NULLexecuting program [pid 701] <... write resumed>) = 18 [pid 697] <... mmap resumed>) = 0x20000000 [pid 701] memfd_create("syzkaller", 0 [pid 697] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 701] <... memfd_create resumed>) = 3 [pid 697] <... openat resumed>) = 5 [pid 701] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 697] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 701] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 697] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 698] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 698] exit_group(0) = ? [pid 698] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=698, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 699] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=699, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 701] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 697] exit_group(0) = ? [pid 697] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=697, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 700] <... write resumed>) = 1048576 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 295] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 702 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 703 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 704 [pid 701] <... write resumed>) = 1048576 [pid 700] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 703 attached ) = 0 [pid 703] set_robust_list(0x55555671f660, 24 [pid 701] munmap(0x7f1ddd1fa000, 138412032 [pid 700] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 703] <... set_robust_list resumed>) = 0 [pid 700] <... openat resumed>) = 4 [pid 700] ioctl(4, LOOP_SET_FD, 3 [pid 703] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 700] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 703] <... prctl resumed>) = 0 [pid 700] ioctl(4, LOOP_CLR_FD./strace-static-x86_64: Process 702 attached ./strace-static-x86_64: Process 704 attached [pid 704] set_robust_list(0x55555671f660, 24 [pid 702] set_robust_list(0x55555671f660, 24) = 0 [pid 704] <... set_robust_list resumed>) = 0 [pid 702] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 704] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 702] <... prctl resumed>) = 0 [pid 704] <... prctl resumed>) = 0 [pid 702] setpgid(0, 0 [pid 704] setpgid(0, 0 [pid 702] <... setpgid resumed>) = 0 [pid 704] <... setpgid resumed>) = 0 [pid 702] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 704] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 702] <... openat resumed>) = 3 [pid 704] <... openat resumed>) = 3 [pid 702] write(3, "1000", 4) = 4 [pid 704] write(3, "1000", 4) = 4 [pid 702] close(3 [pid 704] close(3 [pid 702] <... close resumed>) = 0 [pid 704] <... close resumed>) = 0 [pid 702] write(1, "executing program\n", 18 [pid 700] <... ioctl resumed>) = 0 [pid 703] setpgid(0, 0) = 0 [pid 701] <... munmap resumed>) = 0 [pid 704] write(1, "executing program\n", 18executing program executing program [pid 702] <... write resumed>) = 18 [pid 704] <... write resumed>) = 18 [pid 702] memfd_create("syzkaller", 0 [pid 703] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 700] ioctl(4, LOOP_SET_FD, 3 [pid 701] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 700] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 703] <... openat resumed>) = 3 [pid 701] <... openat resumed>) = 4 [pid 700] close(4 [pid 703] write(3, "1000", 4 [pid 700] <... close resumed>) = 0 [pid 701] ioctl(4, LOOP_SET_FD, 3 [pid 703] <... write resumed>) = 4 [pid 700] close(3 [pid 701] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 704] memfd_create("syzkaller", 0 [pid 702] <... memfd_create resumed>) = 3 [pid 704] <... memfd_create resumed>) = 3 [pid 702] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 704] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 702] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 704] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 700] <... close resumed>) = 0 [pid 703] close(3 [pid 701] ioctl(4, LOOP_CLR_FDexecuting program [pid 703] <... close resumed>) = 0 [pid 701] <... ioctl resumed>) = 0 [pid 703] write(1, "executing program\n", 18 [pid 700] chdir("./file0" [pid 703] <... write resumed>) = 18 [pid 700] <... chdir resumed>) = 0 [pid 703] memfd_create("syzkaller", 0 [pid 700] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 703] <... memfd_create resumed>) = 3 [pid 700] <... open resumed>) = 3 [pid 703] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 700] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 703] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 700] <... mount resumed>) = 0 [pid 702] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 703] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 700] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 701] ioctl(4, LOOP_SET_FD, 3 [pid 700] <... open resumed>) = 4 [pid 701] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 701] close(4 [pid 700] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 701] <... close resumed>) = 0 [pid 701] close(3 [pid 700] <... mmap resumed>) = 0x20000000 [pid 701] <... close resumed>) = 0 [pid 700] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 704] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 700] <... openat resumed>) = 5 [pid 701] chdir("./file0" [pid 700] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 701] <... chdir resumed>) = 0 [pid 701] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 700] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 701] <... open resumed>) = 3 [pid 701] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 700] exit_group(0 [pid 701] <... mount resumed>) = 0 [pid 700] <... exit_group resumed>) = ? [pid 701] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 700] +++ exited with 0 +++ [pid 701] <... open resumed>) = 4 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=700, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 701] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 297] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 701] <... mmap resumed>) = 0x20000000 [pid 297] <... ioctl resumed>) = 0 [pid 701] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 297] close(3) = 0 [pid 701] <... openat resumed>) = 5 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 701] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 705 [pid 701] exit_group(0) = ? [pid 701] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=701, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 703] <... write resumed>) = 1048576 [pid 702] <... write resumed>) = 1048576 [pid 704] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 702] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 704] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 702] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 704] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 702] ioctl(4, LOOP_SET_FD, 3 [pid 704] ioctl(4, LOOP_CLR_FD [pid 702] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 704] <... ioctl resumed>) = 0 [pid 702] ioctl(4, LOOP_CLR_FD) = 0 [pid 703] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 703] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 706 [pid 704] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 702] ioctl(4, LOOP_SET_FD, 3 [pid 704] close(4 [pid 702] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 704] <... close resumed>) = 0 [pid 702] close(4) = 0 [pid 704] close(3) = 0 [pid 702] close(3./strace-static-x86_64: Process 705 attached ./strace-static-x86_64: Process 706 attached [pid 706] set_robust_list(0x55555671f660, 24 [pid 705] set_robust_list(0x55555671f660, 24 [pid 706] <... set_robust_list resumed>) = 0 [pid 705] <... set_robust_list resumed>) = 0 [pid 706] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 705] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 706] setpgid(0, 0 [pid 705] <... prctl resumed>) = 0 [pid 706] <... setpgid resumed>) = 0 [pid 705] setpgid(0, 0 [pid 706] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 705] <... setpgid resumed>) = 0 [pid 706] <... openat resumed>) = 3 [pid 705] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 706] write(3, "1000", 4) = 4 [pid 705] <... openat resumed>) = 3 [pid 706] close(3 [pid 705] write(3, "1000", 4 [pid 706] <... close resumed>) = 0 [pid 703] <... openat resumed>) = 4 executing program [pid 706] write(1, "executing program\n", 18 [pid 705] <... write resumed>) = 4 [pid 706] <... write resumed>) = 18 [pid 705] close(3executing program [pid 706] memfd_create("syzkaller", 0 [pid 705] <... close resumed>) = 0 [pid 706] <... memfd_create resumed>) = 3 [pid 705] write(1, "executing program\n", 18 [pid 706] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 705] <... write resumed>) = 18 [pid 706] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 705] memfd_create("syzkaller", 0 [pid 703] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 703] ioctl(4, LOOP_CLR_FD) = 0 [pid 702] <... close resumed>) = 0 [pid 704] chdir("./file0" [pid 703] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 703] close(4) = 0 [pid 703] close(3 [pid 706] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 705] <... memfd_create resumed>) = 3 [pid 705] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 704] <... chdir resumed>) = 0 [pid 702] chdir("./file0") = 0 [pid 704] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 702] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 704] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 702] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 703] <... close resumed>) = 0 [pid 703] chdir("./file0") = 0 [pid 703] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 704] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 703] <... open resumed>) = 3 [pid 704] <... open resumed>) = 4 [pid 702] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 704] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 702] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 703] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 705] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 703] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 702] <... mmap resumed>) = 0x20000000 [pid 703] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 704] <... mmap resumed>) = 0x20000000 [pid 702] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 704] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 702] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 705] <... write resumed>) = 1048576 [pid 702] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 704] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 702] exit_group(0 [pid 704] exit_group(0 [pid 702] <... exit_group resumed>) = ? [pid 704] <... exit_group resumed>) = ? [pid 702] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=702, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 704] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=704, si_uid=0, si_status=0, si_utime=1, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 703] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 703] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 703] exit_group(0) = ? [pid 299] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] ioctl(3, LOOP_CLR_FD [pid 295] <... openat resumed>) = 3 [pid 299] <... ioctl resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] close(3 [pid 295] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 295] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... close resumed>) = 0 [pid 703] +++ exited with 0 +++ [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 707 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=703, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 708 ./strace-static-x86_64: Process 707 attached [pid 707] set_robust_list(0x55555671f660, 24) = 0 [pid 707] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 707] setpgid(0, 0) = 0 [pid 707] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 707] write(3, "1000", 4 [pid 705] munmap(0x7f1ddd1fa000, 138412032 [pid 707] <... write resumed>) = 4 [pid 707] close(3) = 0 [pid 707] write(1, "executing program\n", 18executing program ) = 18 [pid 707] memfd_create("syzkaller", 0) = 3 [pid 707] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 708 attached [pid 708] set_robust_list(0x55555671f660, 24) = 0 [pid 708] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 708] setpgid(0, 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 705] <... munmap resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 708] <... setpgid resumed>) = 0 [pid 708] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 705] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 709 [pid 705] <... openat resumed>) = 4 [pid 706] <... write resumed>) = 1048576 [pid 705] ioctl(4, LOOP_SET_FD, 3 [pid 706] munmap(0x7f1ddd1fa000, 138412032 [pid 705] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 706] <... munmap resumed>) = 0 [pid 705] ioctl(4, LOOP_CLR_FD [pid 706] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 705] <... ioctl resumed>) = 0 [pid 706] <... openat resumed>) = 4 [pid 706] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 706] ioctl(4, LOOP_CLR_FD) = 0 [pid 708] <... openat resumed>) = 3 [pid 708] write(3, "1000", 4) = 4 [pid 708] close(3 [pid 705] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 705] close(4) = 0 [pid 705] close(3 [pid 706] ioctl(4, LOOP_SET_FD, 3executing program [pid 708] <... close resumed>) = 0 [pid 708] write(1, "executing program\n", 18) = 18 [pid 708] memfd_create("syzkaller", 0) = 3 [pid 708] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 705] <... close resumed>) = 0 [pid 706] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 705] chdir("./file0" [pid 706] close(4 [pid 705] <... chdir resumed>) = 0 [pid 706] <... close resumed>) = 0 [pid 705] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 706] close(3) = 0 [pid 705] <... open resumed>) = 3 [pid 706] chdir("./file0" [pid 705] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 706] <... chdir resumed>) = 0 [pid 705] <... mount resumed>) = 0 [pid 706] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 705] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 706] <... open resumed>) = 3 [pid 705] <... open resumed>) = 4 [pid 706] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 705] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 706] <... mount resumed>) = 0 ./strace-static-x86_64: Process 709 attached [pid 709] set_robust_list(0x55555671f660, 24) = 0 [pid 709] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 705] <... mmap resumed>) = 0x20000000 [pid 706] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 705] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 706] <... open resumed>) = 4 [pid 705] <... openat resumed>) = 5 [pid 706] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 705] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 709] setpgid(0, 0 [pid 706] <... mmap resumed>) = 0x20000000 [pid 705] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 706] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 705] exit_group(0 [pid 706] <... openat resumed>) = 5 [pid 705] <... exit_group resumed>) = ? [pid 706] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 709] <... setpgid resumed>) = 0 [pid 709] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 705] +++ exited with 0 +++ [pid 706] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=705, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 706] exit_group(0) = ? [pid 709] <... openat resumed>) = 3 [pid 709] write(3, "1000", 4) = 4 [pid 709] close(3) = 0 [pid 709] write(1, "executing program\n", 18 [pid 706] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=706, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>executing program [pid 709] <... write resumed>) = 18 [pid 709] memfd_create("syzkaller", 0) = 3 [pid 707] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 709] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 297] <... restart_syscall resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 296] close(3) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 710 [pid 297] <... ioctl resumed>) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 711 [pid 709] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 708] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 710 attached ./strace-static-x86_64: Process 711 attached [pid 710] set_robust_list(0x55555671f660, 24 [pid 711] set_robust_list(0x55555671f660, 24 [pid 710] <... set_robust_list resumed>) = 0 [pid 711] <... set_robust_list resumed>) = 0 [pid 711] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 710] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 711] <... prctl resumed>) = 0 [pid 710] <... prctl resumed>) = 0 [pid 711] setpgid(0, 0 [pid 710] setpgid(0, 0 [pid 711] <... setpgid resumed>) = 0 [pid 710] <... setpgid resumed>) = 0 [pid 711] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 710] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 711] <... openat resumed>) = 3 [pid 710] <... openat resumed>) = 3 [pid 711] write(3, "1000", 4 [pid 710] write(3, "1000", 4 [pid 711] <... write resumed>) = 4 executing program [pid 711] close(3 [pid 710] <... write resumed>) = 4 [pid 711] <... close resumed>) = 0 [pid 710] close(3 [pid 711] write(1, "executing program\n", 18 [pid 710] <... close resumed>) = 0 [pid 711] <... write resumed>) = 18 [pid 710] write(1, "executing program\n", 18executing program [pid 711] memfd_create("syzkaller", 0 [pid 710] <... write resumed>) = 18 [pid 711] <... memfd_create resumed>) = 3 [pid 710] memfd_create("syzkaller", 0 [pid 711] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 710] <... memfd_create resumed>) = 3 [pid 707] <... write resumed>) = 1048576 [pid 708] <... write resumed>) = 1048576 [pid 707] munmap(0x7f1ddd1fa000, 138412032 [pid 711] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 710] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 707] <... munmap resumed>) = 0 [pid 707] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 707] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 707] ioctl(4, LOOP_CLR_FD) = 0 [pid 707] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 707] close(4) = 0 [pid 707] close(3) = 0 [pid 707] chdir("./file0" [pid 710] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 707] <... chdir resumed>) = 0 [pid 707] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 708] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 708] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 708] ioctl(4, LOOP_SET_FD, 3 [pid 711] <... write resumed>) = 1048576 [pid 708] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 708] ioctl(4, LOOP_CLR_FD [pid 707] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 708] <... ioctl resumed>) = 0 [pid 707] <... mount resumed>) = 0 [pid 707] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 707] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 708] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 708] close(4) = 0 [pid 708] close(3 [pid 707] <... mmap resumed>) = 0x20000000 [pid 707] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 709] <... write resumed>) = 1048576 [pid 707] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 707] exit_group(0) = ? [pid 707] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=707, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 709] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 712 ./strace-static-x86_64: Process 712 attached [pid 711] munmap(0x7f1ddd1fa000, 138412032 [pid 710] <... write resumed>) = 1048576 [pid 708] <... close resumed>) = 0 [pid 711] <... munmap resumed>) = 0 [pid 709] <... munmap resumed>) = 0 [pid 708] chdir("./file0" [pid 711] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 709] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 708] <... chdir resumed>) = 0 [pid 711] <... openat resumed>) = 4 [pid 709] <... openat resumed>) = 4 [pid 708] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 711] ioctl(4, LOOP_SET_FD, 3 [pid 709] ioctl(4, LOOP_SET_FD, 3 [pid 708] <... open resumed>) = 3 [pid 711] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 709] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 708] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 711] ioctl(4, LOOP_CLR_FD [pid 709] ioctl(4, LOOP_CLR_FD [pid 708] <... mount resumed>) = 0 [pid 711] <... ioctl resumed>) = 0 [pid 709] <... ioctl resumed>) = 0 [pid 708] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 708] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 712] set_robust_list(0x55555671f660, 24 [pid 710] munmap(0x7f1ddd1fa000, 138412032 [pid 708] <... mmap resumed>) = 0x20000000 [pid 711] ioctl(4, LOOP_SET_FD, 3 [pid 709] ioctl(4, LOOP_SET_FD, 3 [pid 711] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 709] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 708] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 711] close(4 [pid 709] close(4 [pid 708] <... openat resumed>) = 5 [pid 711] <... close resumed>) = 0 [pid 709] <... close resumed>) = 0 [pid 708] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 711] close(3 [pid 709] close(3 [pid 708] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 712] <... set_robust_list resumed>) = 0 [pid 711] <... close resumed>) = 0 [pid 710] <... munmap resumed>) = 0 [pid 709] <... close resumed>) = 0 [pid 708] exit_group(0 [pid 712] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 710] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 708] <... exit_group resumed>) = ? [pid 712] <... prctl resumed>) = 0 [pid 712] setpgid(0, 0 [pid 710] <... openat resumed>) = 4 [pid 708] +++ exited with 0 +++ [pid 712] <... setpgid resumed>) = 0 [pid 710] ioctl(4, LOOP_SET_FD, 3 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=708, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 712] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 710] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 712] <... openat resumed>) = 3 [pid 711] chdir("./file0" [pid 710] ioctl(4, LOOP_CLR_FD [pid 709] chdir("./file0" [pid 712] write(3, "1000", 4 [pid 711] <... chdir resumed>) = 0 [pid 710] <... ioctl resumed>) = 0 [pid 709] <... chdir resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 712] <... write resumed>) = 4 [pid 711] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 709] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 295] <... openat resumed>) = 3 [pid 712] close(3 [pid 711] <... open resumed>) = 3 [pid 709] <... open resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 712] <... close resumed>) = 0 [pid 711] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 709] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 295] <... ioctl resumed>) = 0 executing program [pid 712] write(1, "executing program\n", 18 [pid 711] <... mount resumed>) = 0 [pid 709] <... mount resumed>) = 0 [pid 295] close(3 [pid 712] <... write resumed>) = 18 [pid 711] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 710] ioctl(4, LOOP_SET_FD, 3 [pid 709] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 295] <... close resumed>) = 0 [pid 712] memfd_create("syzkaller", 0 [pid 711] <... open resumed>) = 4 [pid 710] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 709] <... open resumed>) = 4 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 712] <... memfd_create resumed>) = 3 [pid 711] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 710] close(4 [pid 709] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 712] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 711] <... mmap resumed>) = 0x20000000 [pid 710] <... close resumed>) = 0 [pid 709] <... mmap resumed>) = 0x20000000 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 713 [pid 712] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 711] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 710] close(3 [pid 709] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 711] <... openat resumed>) = 5 [pid 709] <... openat resumed>) = 5 [pid 711] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 709] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 711] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 709] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 711] exit_group(0 [pid 709] exit_group(0 [pid 711] <... exit_group resumed>) = ? [pid 709] <... exit_group resumed>) = ? [pid 711] +++ exited with 0 +++ [pid 709] +++ exited with 0 +++ ./strace-static-x86_64: Process 713 attached [pid 713] set_robust_list(0x55555671f660, 24) = 0 [pid 713] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 713] setpgid(0, 0) = 0 [pid 713] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 713] write(3, "1000", 4) = 4 [pid 713] close(3) = 0 [pid 713] write(1, "executing program\n", 18executing program ) = 18 [pid 713] memfd_create("syzkaller", 0) = 3 [pid 710] <... close resumed>) = 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=711, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=709, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 710] chdir("./file0" [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 710] <... chdir resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 710] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 298] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 297] <... openat resumed>) = 3 [pid 298] <... close resumed>) = 0 [pid 297] ioctl(3, LOOP_CLR_FD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... ioctl resumed>) = 0 [pid 713] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 710] <... open resumed>) = 3 [pid 297] close(3 [pid 710] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 714 [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 715 [pid 710] <... mount resumed>) = 0 [pid 710] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 714 attached ) = 4 [pid 710] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 714] set_robust_list(0x55555671f660, 24) = 0 [pid 714] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 714] setpgid(0, 0 [pid 712] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 710] <... mmap resumed>) = 0x20000000 [pid 714] <... setpgid resumed>) = 0 [pid 714] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 714] write(3, "1000", 4) = 4 [pid 714] close(3) = 0 [pid 714] write(1, "executing program\n", 18executing program ) = 18 [pid 714] memfd_create("syzkaller", 0) = 3 [pid 714] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 710] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 710] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 710] exit_group(0) = ? [pid 710] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=710, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 712] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 715 attached [pid 713] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 296] <... restart_syscall resumed>) = 0 [pid 715] set_robust_list(0x55555671f660, 24 [pid 712] munmap(0x7f1ddd1fa000, 138412032 [pid 715] <... set_robust_list resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 715] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 296] <... openat resumed>) = 3 [pid 715] <... prctl resumed>) = 0 [pid 296] ioctl(3, LOOP_CLR_FD [pid 715] setpgid(0, 0 [pid 296] <... ioctl resumed>) = 0 [pid 715] <... setpgid resumed>) = 0 [pid 296] close(3 [pid 712] <... munmap resumed>) = 0 [pid 715] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 296] <... close resumed>) = 0 [pid 712] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 715] <... openat resumed>) = 3 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 715] write(3, "1000", 4 [pid 712] <... openat resumed>) = 4 [pid 714] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576executing program [pid 715] <... write resumed>) = 4 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 716 [pid 715] close(3 [pid 712] ioctl(4, LOOP_SET_FD, 3 [pid 715] <... close resumed>) = 0 [pid 715] write(1, "executing program\n", 18 [pid 712] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 715] <... write resumed>) = 18 [pid 712] ioctl(4, LOOP_CLR_FD [pid 715] memfd_create("syzkaller", 0 [pid 712] <... ioctl resumed>) = 0 [pid 715] <... memfd_create resumed>) = 3 [pid 715] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 714] <... write resumed>) = 1048576 [pid 713] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 713] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 713] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 713] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 716 attached [pid 716] set_robust_list(0x55555671f660, 24) = 0 [pid 716] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 712] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 712] close(4) = 0 [pid 712] close(3 [pid 713] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 713] close(4) = 0 [pid 713] close(3 [pid 712] <... close resumed>) = 0 [pid 716] <... prctl resumed>) = 0 [pid 716] setpgid(0, 0) = 0 [pid 716] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 713] <... close resumed>) = 0 [pid 716] <... openat resumed>) = 3 [pid 716] write(3, "1000", 4) = 4 [pid 716] close(3) = 0 [pid 716] write(1, "executing program\n", 18executing program ) = 18 [pid 716] memfd_create("syzkaller", 0) = 3 [pid 716] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 712] chdir("./file0") = 0 [pid 712] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 714] munmap(0x7f1ddd1fa000, 138412032 [pid 712] <... open resumed>) = 3 [pid 713] chdir("./file0" [pid 715] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 713] <... chdir resumed>) = 0 [pid 712] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 713] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 714] <... munmap resumed>) = 0 [pid 712] <... mount resumed>) = 0 [pid 712] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 714] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 712] <... open resumed>) = 4 [pid 712] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 714] <... openat resumed>) = 4 [pid 714] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 714] ioctl(4, LOOP_CLR_FD) = 0 [pid 712] <... mmap resumed>) = 0x20000000 [pid 712] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 713] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 713] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 713] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 714] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 714] close(4) = 0 [pid 714] close(3 [pid 715] <... write resumed>) = 1048576 [pid 712] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 715] munmap(0x7f1ddd1fa000, 138412032 [pid 712] exit_group(0) = ? [pid 713] <... mmap resumed>) = 0x20000000 [pid 712] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=712, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 715] <... munmap resumed>) = 0 [pid 713] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 713] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 715] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 713] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 713] exit_group(0) = ? [pid 713] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=713, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 717 [pid 299] <... restart_syscall resumed>) = 0 [pid 715] <... openat resumed>) = 4 [pid 715] ioctl(4, LOOP_SET_FD, 3 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR./strace-static-x86_64: Process 717 attached [pid 715] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] <... openat resumed>) = 3 [pid 715] ioctl(4, LOOP_CLR_FD [pid 717] set_robust_list(0x55555671f660, 24 [pid 299] ioctl(3, LOOP_CLR_FD [pid 715] <... ioctl resumed>) = 0 [pid 717] <... set_robust_list resumed>) = 0 [pid 299] <... ioctl resumed>) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 717] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 718 [pid 717] <... prctl resumed>) = 0 [pid 717] setpgid(0, 0 [pid 715] ioctl(4, LOOP_SET_FD, 3 [pid 717] <... setpgid resumed>) = 0 [pid 715] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 715] close(4 [pid 717] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC./strace-static-x86_64: Process 718 attached [pid 716] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 715] <... close resumed>) = 0 [pid 714] <... close resumed>) = 0 [pid 717] <... openat resumed>) = 3 [pid 715] close(3 [pid 717] write(3, "1000", 4 [pid 718] set_robust_list(0x55555671f660, 24) = 0 [pid 714] chdir("./file0" [pid 718] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 714] <... chdir resumed>) = 0 [pid 714] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 718] <... prctl resumed>) = 0 [pid 718] setpgid(0, 0) = 0 [pid 718] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program [pid 715] <... close resumed>) = 0 [pid 717] <... write resumed>) = 4 [pid 715] chdir("./file0" [pid 717] close(3) = 0 [pid 715] <... chdir resumed>) = 0 [pid 717] write(1, "executing program\n", 18 [pid 715] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 717] <... write resumed>) = 18 [pid 718] <... openat resumed>) = 3 [pid 717] memfd_create("syzkaller", 0executing program ) = 3 [pid 718] write(3, "1000", 4 [pid 717] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 714] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 717] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 718] <... write resumed>) = 4 [pid 714] <... mount resumed>) = 0 [pid 718] close(3) = 0 [pid 718] write(1, "executing program\n", 18) = 18 [pid 718] memfd_create("syzkaller", 0) = 3 [pid 714] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 718] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 714] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 717] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 715] <... open resumed>) = 3 [pid 715] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 714] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 715] <... mount resumed>) = 0 [pid 715] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 715] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 714] <... openat resumed>) = 5 [pid 714] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 714] exit_group(0) = ? [pid 715] <... mmap resumed>) = 0x20000000 [pid 714] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=714, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 715] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] <... restart_syscall resumed>) = 0 [pid 715] <... openat resumed>) = 5 [pid 715] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 715] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 298] <... openat resumed>) = 3 [pid 715] exit_group(0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 715] <... exit_group resumed>) = ? [pid 298] <... ioctl resumed>) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 719 [pid 715] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=715, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 716] <... write resumed>) = 1048576 [pid 717] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 719 attached [pid 719] set_robust_list(0x55555671f660, 24) = 0 [pid 719] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 719] setpgid(0, 0) = 0 [pid 719] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 718] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 717] munmap(0x7f1ddd1fa000, 138412032 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 717] <... munmap resumed>) = 0 [pid 297] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 717] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 297] <... ioctl resumed>) = 0 [pid 717] <... openat resumed>) = 4 [pid 297] close(3 [pid 717] ioctl(4, LOOP_SET_FD, 3 [pid 297] <... close resumed>) = 0 [pid 717] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 719] <... openat resumed>) = 3 [pid 719] write(3, "1000", 4) = 4 [pid 717] ioctl(4, LOOP_CLR_FD [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 720 [pid 717] <... ioctl resumed>) = 0 [pid 719] close(3) = 0 [pid 719] write(1, "executing program\n", 18executing program ) = 18 [pid 719] memfd_create("syzkaller", 0) = 3 [pid 717] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 717] close(4) = 0 [pid 717] close(3 [pid 716] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 719] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 717] <... close resumed>) = 0 [pid 716] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 716] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 716] ioctl(4, LOOP_CLR_FD) = 0 [pid 717] chdir("./file0"./strace-static-x86_64: Process 720 attached [pid 716] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 716] close(4) = 0 [pid 716] close(3 [pid 717] <... chdir resumed>) = 0 [pid 717] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 720] set_robust_list(0x55555671f660, 24 [pid 717] <... open resumed>) = 3 [pid 720] <... set_robust_list resumed>) = 0 [pid 717] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 720] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 717] <... mount resumed>) = 0 [pid 720] <... prctl resumed>) = 0 [pid 717] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 720] setpgid(0, 0) = 0 [pid 717] <... open resumed>) = 4 [pid 720] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 717] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 720] <... openat resumed>) = 3 [pid 717] <... mmap resumed>) = 0x20000000 [pid 720] write(3, "1000", 4 [pid 717] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 720] <... write resumed>) = 4 executing program [pid 720] close(3 [pid 717] <... openat resumed>) = 5 [pid 720] <... close resumed>) = 0 [pid 717] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 720] write(1, "executing program\n", 18 [pid 717] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 720] <... write resumed>) = 18 [pid 720] memfd_create("syzkaller", 0 [pid 717] exit_group(0 [pid 720] <... memfd_create resumed>) = 3 [pid 717] <... exit_group resumed>) = ? [pid 720] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 717] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=717, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 720] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 718] <... write resumed>) = 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 721 [pid 716] <... close resumed>) = 0 [pid 716] chdir("./file0"./strace-static-x86_64: Process 721 attached [pid 720] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 719] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 718] munmap(0x7f1ddd1fa000, 138412032 [pid 721] set_robust_list(0x55555671f660, 24) = 0 [pid 716] <... chdir resumed>) = 0 [pid 721] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 718] <... munmap resumed>) = 0 [pid 716] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 721] <... prctl resumed>) = 0 [pid 721] setpgid(0, 0) = 0 [pid 721] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 716] <... open resumed>) = 3 [pid 721] write(3, "1000", 4) = 4 [pid 721] close(3) = 0 executing program [pid 721] write(1, "executing program\n", 18) = 18 [pid 721] memfd_create("syzkaller", 0 [pid 716] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 718] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 721] <... memfd_create resumed>) = 3 [pid 721] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 721] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 720] <... write resumed>) = 1048576 [pid 718] <... openat resumed>) = 4 [pid 716] <... mount resumed>) = 0 [pid 716] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 718] ioctl(4, LOOP_SET_FD, 3 [pid 716] <... open resumed>) = 4 [pid 718] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 716] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 718] ioctl(4, LOOP_CLR_FD [pid 716] <... mmap resumed>) = 0x20000000 [pid 718] <... ioctl resumed>) = 0 [pid 716] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 716] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 716] exit_group(0) = ? [pid 716] +++ exited with 0 +++ [pid 718] ioctl(4, LOOP_SET_FD, 3 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=716, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 718] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 718] close(4) = 0 [pid 718] close(3 [pid 721] <... write resumed>) = 1048576 [pid 721] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 721] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 721] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 721] ioctl(4, LOOP_CLR_FD) = 0 [pid 720] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 720] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 720] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 720] ioctl(4, LOOP_CLR_FD) = 0 [pid 718] <... close resumed>) = 0 [pid 718] chdir("./file0" [pid 721] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 721] close(4) = 0 [pid 721] close(3) = 0 [pid 720] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 720] close(4) = 0 [pid 720] close(3 [pid 719] <... write resumed>) = 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 718] <... chdir resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 718] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 718] <... open resumed>) = 3 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 722 [pid 719] munmap(0x7f1ddd1fa000, 138412032 [pid 718] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 718] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 719] <... munmap resumed>) = 0 [pid 719] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 718] <... open resumed>) = 4 [pid 719] <... openat resumed>) = 4 [pid 719] ioctl(4, LOOP_SET_FD, 3 [pid 718] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 719] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 719] ioctl(4, LOOP_CLR_FD) = 0 [pid 718] <... mmap resumed>) = 0x20000000 [pid 721] chdir("./file0") = 0 [pid 721] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 718] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 719] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 719] close(4) = 0 [pid 719] close(3 [pid 718] <... openat resumed>) = 5 [pid 718] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 719] <... close resumed>) = 0 [pid 721] <... open resumed>) = 3 [pid 720] <... close resumed>) = 0 [pid 720] chdir("./file0" [pid 718] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 720] <... chdir resumed>) = 0 [pid 721] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 718] exit_group(0./strace-static-x86_64: Process 722 attached [pid 720] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 719] chdir("./file0" [pid 718] <... exit_group resumed>) = ? [pid 722] set_robust_list(0x55555671f660, 24 [pid 720] <... open resumed>) = 3 [pid 721] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 718] +++ exited with 0 +++ [pid 722] <... set_robust_list resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=718, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 721] <... open resumed>) = 4 [pid 721] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 722] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 720] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 722] <... prctl resumed>) = 0 [pid 720] <... mount resumed>) = 0 [pid 722] setpgid(0, 0 [pid 720] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 722] <... setpgid resumed>) = 0 [pid 720] <... open resumed>) = 4 [pid 722] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 720] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 722] <... openat resumed>) = 3 [pid 722] write(3, "1000", 4) = 4 [pid 722] close(3) = 0 [pid 722] write(1, "executing program\n", 18executing program ) = 18 [pid 722] memfd_create("syzkaller", 0 [pid 721] <... mmap resumed>) = 0x20000000 [pid 722] <... memfd_create resumed>) = 3 [pid 721] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 722] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 721] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 721] exit_group(0) = ? [pid 720] <... mmap resumed>) = 0x20000000 [pid 721] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=721, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 719] <... chdir resumed>) = 0 [pid 720] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 719] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 720] <... openat resumed>) = 5 [pid 720] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 720] exit_group(0) = ? [pid 720] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=720, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 719] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 719] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 719] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 722] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] close(3 [pid 295] close(3 [pid 299] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 723 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 724 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 725 [pid 719] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 719] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 719] exit_group(0) = ? [pid 719] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=719, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 724 attached [pid 724] set_robust_list(0x55555671f660, 24) = 0 executing program [pid 724] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 724] setpgid(0, 0) = 0 [pid 724] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 724] write(3, "1000", 4) = 4 [pid 724] close(3) = 0 [pid 724] write(1, "executing program\n", 18) = 18 [pid 724] memfd_create("syzkaller", 0) = 3 [pid 724] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 726 ./strace-static-x86_64: Process 723 attached ./strace-static-x86_64: Process 725 attached [pid 723] set_robust_list(0x55555671f660, 24 [pid 725] set_robust_list(0x55555671f660, 24 [pid 723] <... set_robust_list resumed>) = 0 [pid 725] <... set_robust_list resumed>) = 0 [pid 723] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 725] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 723] <... prctl resumed>) = 0 [pid 723] setpgid(0, 0 [pid 725] <... prctl resumed>) = 0 [pid 724] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 725] setpgid(0, 0 [pid 723] <... setpgid resumed>) = 0 [pid 725] <... setpgid resumed>) = 0 [pid 723] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 725] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 723] <... openat resumed>) = 3 [pid 725] <... openat resumed>) = 3 [pid 723] write(3, "1000", 4 [pid 725] write(3, "1000", 4 [pid 723] <... write resumed>) = 4 [pid 723] close(3 [pid 725] <... write resumed>) = 4 [pid 725] close(3 [pid 723] <... close resumed>) = 0 [pid 725] <... close resumed>) = 0 executing program [pid 723] write(1, "executing program\n", 18) = 18 [pid 725] write(1, "executing program\n", 18executing program ) = 18 ./strace-static-x86_64: Process 726 attached [pid 723] memfd_create("syzkaller", 0 [pid 725] memfd_create("syzkaller", 0 [pid 726] set_robust_list(0x55555671f660, 24 [pid 723] <... memfd_create resumed>) = 3 [pid 725] <... memfd_create resumed>) = 3 [pid 726] <... set_robust_list resumed>) = 0 [pid 726] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 725] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 723] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 725] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 723] <... mmap resumed>) = 0x7f1ddd1fa000 executing program [pid 722] <... write resumed>) = 1048576 [pid 726] <... prctl resumed>) = 0 [pid 726] setpgid(0, 0) = 0 [pid 726] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 726] write(3, "1000", 4) = 4 [pid 726] close(3) = 0 [pid 726] write(1, "executing program\n", 18) = 18 [pid 726] memfd_create("syzkaller", 0) = 3 [pid 726] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 726] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 722] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 722] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 725] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 722] <... openat resumed>) = 4 [pid 722] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 722] ioctl(4, LOOP_CLR_FD) = 0 [pid 723] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 724] <... write resumed>) = 1048576 [pid 724] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 722] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 722] close(4) = 0 [pid 722] close(3) = 0 [pid 724] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 724] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 724] ioctl(4, LOOP_CLR_FD) = 0 [pid 722] chdir("./file0") = 0 [pid 722] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 722] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 722] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 722] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 724] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 724] close(4) = 0 [pid 724] close(3) = 0 [pid 722] <... mmap resumed>) = 0x20000000 [pid 722] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 722] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 722] exit_group(0) = ? [pid 722] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=722, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 724] chdir("./file0") = 0 [pid 724] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 724] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 724] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 724] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 723] <... write resumed>) = 1048576 [pid 724] <... mmap resumed>) = 0x20000000 [pid 724] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 724] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 724] exit_group(0) = ? [pid 724] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=724, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 725] <... write resumed>) = 1048576 [pid 723] munmap(0x7f1ddd1fa000, 138412032 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 727 [pid 726] <... write resumed>) = 1048576 [pid 723] <... munmap resumed>) = 0 [pid 725] munmap(0x7f1ddd1fa000, 138412032 [pid 726] munmap(0x7f1ddd1fa000, 138412032 [pid 723] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 726] <... munmap resumed>) = 0 [pid 723] <... openat resumed>) = 4 [pid 726] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 726] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 726] ioctl(4, LOOP_CLR_FD [pid 723] ioctl(4, LOOP_SET_FD, 3 [pid 726] <... ioctl resumed>) = 0 [pid 725] <... munmap resumed>) = 0 [pid 723] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) ./strace-static-x86_64: Process 727 attached [pid 723] ioctl(4, LOOP_CLR_FD [pid 725] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 727] set_robust_list(0x55555671f660, 24 [pid 297] <... restart_syscall resumed>) = 0 [pid 723] <... ioctl resumed>) = 0 [pid 725] <... openat resumed>) = 4 executing program [pid 725] ioctl(4, LOOP_SET_FD, 3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 728 [pid 726] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 726] close(4) = 0 [pid 726] close(3) = 0 [pid 727] <... set_robust_list resumed>) = 0 [pid 727] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 727] setpgid(0, 0) = 0 [pid 727] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 727] write(3, "1000", 4) = 4 [pid 727] close(3) = 0 [pid 727] write(1, "executing program\n", 18) = 18 [pid 727] memfd_create("syzkaller", 0) = 3 [pid 727] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 726] chdir("./file0") = 0 [pid 726] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 726] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 726] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 726] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 725] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) ./strace-static-x86_64: Process 728 attached [pid 728] set_robust_list(0x55555671f660, 24 [pid 725] ioctl(4, LOOP_CLR_FD) = 0 [pid 728] <... set_robust_list resumed>) = 0 [pid 728] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 723] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 728] setpgid(0, 0 [pid 723] close(4 [pid 728] <... setpgid resumed>) = 0 [pid 728] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 723] <... close resumed>) = 0 [pid 725] ioctl(4, LOOP_SET_FD, 3 [pid 723] close(3 [pid 725] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 723] <... close resumed>) = 0 [pid 725] close(4 [pid 728] <... openat resumed>) = 3 [pid 725] <... close resumed>) = 0 [pid 723] chdir("./file0" [pid 728] write(3, "1000", 4) = 4 [pid 725] close(3 [pid 723] <... chdir resumed>) = 0 [pid 728] close(3) = 0 [pid 728] write(1, "executing program\n", 18executing program ) = 18 [pid 728] memfd_create("syzkaller", 0 [pid 726] <... mmap resumed>) = 0x20000000 [pid 728] <... memfd_create resumed>) = 3 [pid 728] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 725] <... close resumed>) = 0 [pid 726] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 725] chdir("./file0" [pid 723] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 726] <... openat resumed>) = 5 [pid 726] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 723] <... open resumed>) = 3 [pid 725] <... chdir resumed>) = 0 [pid 726] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 726] exit_group(0 [pid 725] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 723] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 726] <... exit_group resumed>) = ? [pid 725] <... open resumed>) = 3 [pid 723] <... mount resumed>) = 0 [pid 725] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 726] +++ exited with 0 +++ [pid 725] <... mount resumed>) = 0 [pid 723] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=726, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 723] <... open resumed>) = 4 [pid 725] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 723] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 725] <... open resumed>) = 4 [pid 723] <... mmap resumed>) = 0x20000000 [pid 725] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 723] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 725] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 723] <... openat resumed>) = 5 [pid 725] <... openat resumed>) = 5 [pid 725] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 723] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 725] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 725] exit_group(0 [pid 723] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 727] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 725] <... exit_group resumed>) = ? [pid 723] exit_group(0 [pid 725] +++ exited with 0 +++ [pid 723] <... exit_group resumed>) = ? [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=725, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 723] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=723, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 729 [pid 299] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 295] close(3 [pid 299] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 730 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 731 ./strace-static-x86_64: Process 731 attached ./strace-static-x86_64: Process 729 attached [pid 731] set_robust_list(0x55555671f660, 24) = 0 [pid 729] set_robust_list(0x55555671f660, 24 [pid 731] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 729] <... set_robust_list resumed>) = 0 [pid 731] <... prctl resumed>) = 0 [pid 729] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 731] setpgid(0, 0 [pid 729] <... prctl resumed>) = 0 [pid 731] <... setpgid resumed>) = 0 [pid 729] setpgid(0, 0 [pid 731] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 729] <... setpgid resumed>) = 0 [pid 728] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 731] <... openat resumed>) = 3 [pid 729] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 731] write(3, "1000", 4 [pid 729] <... openat resumed>) = 3 [pid 731] <... write resumed>) = 4 [pid 729] write(3, "1000", 4 [pid 731] close(3 [pid 729] <... write resumed>) = 4 [pid 731] <... close resumed>) = 0 [pid 729] close(3 executing program [pid 731] write(1, "executing program\n", 18 [pid 729] <... close resumed>) = 0 [pid 731] <... write resumed>) = 18 [pid 731] memfd_create("syzkaller", 0 [pid 729] write(1, "executing program\n", 18executing program [pid 731] <... memfd_create resumed>) = 3 [pid 729] <... write resumed>) = 18 [pid 731] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 729] memfd_create("syzkaller", 0 [pid 727] <... write resumed>) = 1048576 [pid 727] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 727] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 727] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 727] ioctl(4, LOOP_CLR_FD) = 0 [pid 727] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 727] close(4) = 0 [pid 727] close(3./strace-static-x86_64: Process 730 attached [pid 730] set_robust_list(0x55555671f660, 24) = 0 [pid 731] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 730] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 730] setpgid(0, 0) = 0 [pid 729] <... memfd_create resumed>) = 3 [pid 729] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 executing program [pid 727] <... close resumed>) = 0 [pid 730] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 730] write(3, "1000", 4) = 4 [pid 730] close(3) = 0 [pid 730] write(1, "executing program\n", 18) = 18 [pid 730] memfd_create("syzkaller", 0) = 3 [pid 730] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 727] chdir("./file0") = 0 [pid 727] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 728] <... write resumed>) = 1048576 [pid 727] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 728] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 727] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 728] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 727] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 728] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 728] ioctl(4, LOOP_CLR_FD) = 0 [pid 728] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 728] close(4) = 0 [pid 728] close(3) = 0 [pid 727] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 727] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 727] exit_group(0) = ? [pid 727] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=727, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 732 [pid 728] chdir("./file0") = 0 [pid 728] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 729] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 728] <... open resumed>) = 3 [pid 728] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 728] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 728] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 730] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 732 attached [pid 732] set_robust_list(0x55555671f660, 24 [pid 728] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 732] <... set_robust_list resumed>) = 0 [pid 728] <... openat resumed>) = 5 [pid 732] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 728] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 732] setpgid(0, 0 [pid 728] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 728] exit_group(0 [pid 732] <... setpgid resumed>) = 0 [pid 732] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 728] <... exit_group resumed>) = ? [pid 729] <... write resumed>) = 1048576 [pid 728] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=728, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 732] <... openat resumed>) = 3 [pid 731] <... write resumed>) = 1048576 [pid 729] munmap(0x7f1ddd1fa000, 138412032 [pid 732] write(3, "1000", 4) = 4 [pid 732] close(3executing program ) = 0 [pid 732] write(1, "executing program\n", 18) = 18 [pid 732] memfd_create("syzkaller", 0 [pid 731] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 732] <... memfd_create resumed>) = 3 [pid 731] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 732] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 731] <... openat resumed>) = 4 [pid 731] ioctl(4, LOOP_SET_FD, 3 [pid 729] <... munmap resumed>) = 0 [pid 731] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 729] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 731] ioctl(4, LOOP_CLR_FD) = 0 [pid 729] <... openat resumed>) = 4 [pid 729] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 729] ioctl(4, LOOP_CLR_FD) = 0 [pid 731] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 731] close(4 [pid 297] <... restart_syscall resumed>) = 0 [pid 731] <... close resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 731] close(3 [pid 297] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 733 [pid 731] <... close resumed>) = 0 [pid 729] ioctl(4, LOOP_SET_FD, 3 [pid 731] chdir("./file0" [pid 729] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 731] <... chdir resumed>) = 0 [pid 729] close(4) = 0 [pid 731] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 729] close(3) = 0 [pid 731] <... open resumed>) = 3 [pid 731] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 731] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 731] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 729] chdir("./file0" [pid 730] <... write resumed>) = 1048576 [pid 730] munmap(0x7f1ddd1fa000, 138412032) = 0 ./strace-static-x86_64: Process 733 attached [pid 730] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 733] set_robust_list(0x55555671f660, 24 [pid 730] <... openat resumed>) = 4 [pid 733] <... set_robust_list resumed>) = 0 [pid 729] <... chdir resumed>) = 0 [pid 730] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 730] ioctl(4, LOOP_CLR_FD) = 0 [pid 733] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 729] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 733] <... prctl resumed>) = 0 [pid 733] setpgid(0, 0) = 0 [pid 733] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 729] <... open resumed>) = 3 executing program [pid 733] <... openat resumed>) = 3 [pid 730] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 730] close(4) = 0 [pid 730] close(3 [pid 733] write(3, "1000", 4) = 4 [pid 733] close(3) = 0 [pid 733] write(1, "executing program\n", 18) = 18 [pid 733] memfd_create("syzkaller", 0) = 3 [pid 733] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 732] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 733] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 729] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 731] <... mmap resumed>) = 0x20000000 [pid 729] <... mount resumed>) = 0 [pid 731] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 729] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 731] <... openat resumed>) = 5 [pid 729] <... open resumed>) = 4 [pid 731] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 729] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 731] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 729] <... mmap resumed>) = 0x20000000 [pid 731] exit_group(0 [pid 729] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 731] <... exit_group resumed>) = ? [pid 729] <... openat resumed>) = 5 [pid 731] +++ exited with 0 +++ [pid 729] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=731, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 729] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 735 [pid 730] <... close resumed>) = 0 [pid 730] chdir("./file0") = 0 [pid 730] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 729] exit_group(0 [pid 730] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 729] <... exit_group resumed>) = ? [pid 730] <... mount resumed>) = 0 [pid 730] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 729] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=729, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 730] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 736 [pid 732] <... write resumed>) = 1048576 [pid 730] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 730] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) ./strace-static-x86_64: Process 736 attached [pid 730] exit_group(0) = ? [pid 730] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=730, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 736] set_robust_list(0x55555671f660, 24) = 0 [pid 736] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 735 attached [pid 735] set_robust_list(0x55555671f660, 24 [pid 736] <... prctl resumed>) = 0 [pid 735] <... set_robust_list resumed>) = 0 [pid 736] setpgid(0, 0 [pid 735] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 735] setpgid(0, 0) = 0 [pid 736] <... setpgid resumed>) = 0 [pid 736] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 735] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 735] write(3, "1000", 4 [pid 736] <... openat resumed>) = 3 [pid 735] <... write resumed>) = 4 [pid 736] write(3, "1000", 4) = 4 [pid 735] close(3 [pid 736] close(3 [pid 735] <... close resumed>) = 0 [pid 735] write(1, "executing program\n", 18executing program [pid 736] <... close resumed>) = 0 [pid 735] <... write resumed>) = 18 [pid 735] memfd_create("syzkaller", 0executing program [pid 736] write(1, "executing program\n", 18) = 18 [pid 735] <... memfd_create resumed>) = 3 [pid 735] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 736] memfd_create("syzkaller", 0 [pid 732] munmap(0x7f1ddd1fa000, 138412032 [pid 736] <... memfd_create resumed>) = 3 [pid 736] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 733] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 732] <... munmap resumed>) = 0 [pid 732] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 732] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 732] ioctl(4, LOOP_CLR_FD) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 737 [pid 732] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 732] close(4) = 0 [pid 732] close(3) = 0 [pid 736] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 737 attached [pid 737] set_robust_list(0x55555671f660, 24 [pid 732] chdir("./file0") = 0 [pid 732] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 737] <... set_robust_list resumed>) = 0 [pid 737] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 737] setpgid(0, 0) = 0 [pid 737] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 732] <... open resumed>) = 3 [pid 732] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 737] write(3, "1000", 4) = 4 [pid 732] <... mount resumed>) = 0 [pid 737] close(3 [pid 732] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 737] <... close resumed>) = 0 [pid 737] write(1, "executing program\n", 18executing program ) = 18 [pid 732] <... open resumed>) = 4 [pid 732] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 737] memfd_create("syzkaller", 0) = 3 [pid 737] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 732] <... mmap resumed>) = 0x20000000 [pid 733] <... write resumed>) = 1048576 [pid 733] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 733] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 733] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 733] ioctl(4, LOOP_CLR_FD) = 0 [pid 732] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 732] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 732] exit_group(0) = ? [pid 732] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=732, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 733] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 733] close(4) = 0 [pid 733] close(3 [pid 735] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 737] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 738 [pid 736] <... write resumed>) = 1048576 [pid 733] <... close resumed>) = 0 [pid 733] chdir("./file0") = 0 [pid 733] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 733] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 733] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 736] munmap(0x7f1ddd1fa000, 138412032 [pid 733] <... open resumed>) = 4 [pid 736] <... munmap resumed>) = 0 ./strace-static-x86_64: Process 738 attached [pid 737] <... write resumed>) = 1048576 [pid 735] <... write resumed>) = 1048576 [pid 733] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 736] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 733] <... mmap resumed>) = 0x20000000 [pid 736] <... openat resumed>) = 4 [pid 736] ioctl(4, LOOP_SET_FD, 3 [pid 733] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 736] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 736] ioctl(4, LOOP_CLR_FD [pid 733] <... openat resumed>) = 5 [pid 738] set_robust_list(0x55555671f660, 24 [pid 736] <... ioctl resumed>) = 0 [pid 733] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 733] exit_group(0 [pid 738] <... set_robust_list resumed>) = 0 [pid 738] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 733] <... exit_group resumed>) = ? [pid 733] +++ exited with 0 +++ [pid 736] ioctl(4, LOOP_SET_FD, 3 [pid 738] <... prctl resumed>) = 0 [pid 738] setpgid(0, 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=733, si_uid=0, si_status=0, si_utime=2, si_stime=0} --- [pid 738] <... setpgid resumed>) = 0 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 738] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 736] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 738] <... openat resumed>) = 3 [pid 735] munmap(0x7f1ddd1fa000, 138412032 [pid 736] close(4 [pid 738] write(3, "1000", 4 [pid 736] <... close resumed>) = 0 [pid 735] <... munmap resumed>) = 0 [pid 738] <... write resumed>) = 4 [pid 735] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 738] close(3 [pid 735] <... openat resumed>) = 4 [pid 738] <... close resumed>) = 0 [pid 735] ioctl(4, LOOP_SET_FD, 3 [pid 738] write(1, "executing program\n", 18 [pid 735] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 736] close(3executing program [pid 738] <... write resumed>) = 18 [pid 735] ioctl(4, LOOP_CLR_FD [pid 738] memfd_create("syzkaller", 0 [pid 735] <... ioctl resumed>) = 0 [pid 738] <... memfd_create resumed>) = 3 [pid 738] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 736] <... close resumed>) = 0 [pid 735] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 735] close(4) = 0 [pid 735] close(3 [pid 297] <... restart_syscall resumed>) = 0 [pid 735] <... close resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 736] chdir("./file0" [pid 297] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 736] <... chdir resumed>) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 739 [pid 735] chdir("./file0" [pid 736] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 735] <... chdir resumed>) = 0 [pid 735] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 736] <... open resumed>) = 3 [pid 735] <... open resumed>) = 3 [pid 735] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 736] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 735] <... mount resumed>) = 0 [pid 735] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 736] <... mount resumed>) = 0 [pid 735] <... open resumed>) = 4 [pid 735] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 736] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 735] <... mmap resumed>) = 0x20000000 [pid 738] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 736] <... open resumed>) = 4 [pid 735] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 736] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0./strace-static-x86_64: Process 739 attached [pid 735] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 737] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 735] exit_group(0) = ? [pid 739] set_robust_list(0x55555671f660, 24 [pid 736] <... mmap resumed>) = 0x20000000 [pid 735] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=735, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 737] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 737] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 737] ioctl(4, LOOP_CLR_FD) = 0 [pid 739] <... set_robust_list resumed>) = 0 [pid 736] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 736] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 739] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 736] exit_group(0 [pid 295] <... restart_syscall resumed>) = 0 [pid 739] <... prctl resumed>) = 0 [pid 736] <... exit_group resumed>) = ? [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 740 [pid 736] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=736, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 737] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 737] close(4) = 0 [pid 739] setpgid(0, 0 [pid 737] close(3 [pid 739] <... setpgid resumed>) = 0 [pid 737] <... close resumed>) = 0 [pid 739] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 737] chdir("./file0") = 0 [pid 737] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 739] <... openat resumed>) = 3 [pid 739] write(3, "1000", 4) = 4 [pid 737] <... open resumed>) = 3 [pid 737] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 739] close(3 [pid 737] <... mount resumed>) = 0 [pid 739] <... close resumed>) = 0 [pid 737] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 737] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 739] write(1, "executing program\n", 18executing program ) = 18 [pid 739] memfd_create("syzkaller", 0) = 3 [pid 739] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 executing program [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 741 [pid 737] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 740 attached [pid 740] set_robust_list(0x55555671f660, 24) = 0 [pid 740] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 740] setpgid(0, 0) = 0 [pid 740] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 740] write(3, "1000", 4) = 4 [pid 740] close(3) = 0 [pid 740] write(1, "executing program\n", 18) = 18 [pid 740] memfd_create("syzkaller", 0 [pid 737] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 740] <... memfd_create resumed>) = 3 [pid 740] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 737] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 739] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 737] exit_group(0) = ? [pid 737] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=737, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 738] <... write resumed>) = 1048576 [pid 738] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 738] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 738] ioctl(4, LOOP_SET_FD, 3 [pid 739] <... write resumed>) = 1048576 [pid 738] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 738] ioctl(4, LOOP_CLR_FD [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 742 ./strace-static-x86_64: Process 741 attached [pid 738] <... ioctl resumed>) = 0 [pid 741] set_robust_list(0x55555671f660, 24) = 0 ./strace-static-x86_64: Process 742 attached [pid 742] set_robust_list(0x55555671f660, 24 [pid 741] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 742] <... set_robust_list resumed>) = 0 [pid 742] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 741] <... prctl resumed>) = 0 [pid 742] <... prctl resumed>) = 0 [pid 742] setpgid(0, 0) = 0 [pid 741] setpgid(0, 0 [pid 742] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 741] <... setpgid resumed>) = 0 [pid 738] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 738] close(4) = 0 [pid 738] close(3 [pid 741] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 738] <... close resumed>) = 0 [pid 742] <... openat resumed>) = 3 [pid 742] write(3, "1000", 4) = 4 [pid 742] close(3) = 0 executing program [pid 742] write(1, "executing program\n", 18) = 18 [pid 742] memfd_create("syzkaller", 0 [pid 741] <... openat resumed>) = 3 [pid 739] munmap(0x7f1ddd1fa000, 138412032 [pid 742] <... memfd_create resumed>) = 3 [pid 742] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 741] write(3, "1000", 4) = 4 [pid 739] <... munmap resumed>) = 0 [pid 741] close(3 [pid 739] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 738] chdir("./file0") = 0 [pid 738] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 741] <... close resumed>) = 0 [pid 739] <... openat resumed>) = 4 [pid 738] <... open resumed>) = 3 [pid 741] write(1, "executing program\n", 18 [pid 739] ioctl(4, LOOP_SET_FD, 3executing program [pid 741] <... write resumed>) = 18 [pid 741] memfd_create("syzkaller", 0 [pid 739] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 741] <... memfd_create resumed>) = 3 [pid 740] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 739] ioctl(4, LOOP_CLR_FD [pid 738] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 738] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 741] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 739] <... ioctl resumed>) = 0 [pid 738] <... open resumed>) = 4 [pid 741] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 738] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 738] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 738] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 738] exit_group(0) = ? [pid 738] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=738, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 743 [pid 741] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 739] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 739] close(4) = 0 [pid 739] close(3) = 0 [pid 739] chdir("./file0") = 0 [pid 739] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 739] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 739] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 739] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 740] <... write resumed>) = 1048576 [pid 740] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 742] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 739] <... mmap resumed>) = 0x20000000 [pid 740] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 740] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 739] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 740] ioctl(4, LOOP_CLR_FD) = 0 [pid 739] <... openat resumed>) = 5 [pid 739] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 739] exit_group(0) = ? [pid 740] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 740] close(4 [pid 739] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=739, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 744 [pid 740] <... close resumed>) = 0 [pid 740] close(3 [pid 741] <... write resumed>) = 1048576 [pid 742] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 743 attached [pid 741] munmap(0x7f1ddd1fa000, 138412032 [pid 740] <... close resumed>) = 0 [pid 740] chdir("./file0" [pid 743] set_robust_list(0x55555671f660, 24 [pid 740] <... chdir resumed>) = 0 [pid 740] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 743] <... set_robust_list resumed>) = 0 [pid 743] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 742] munmap(0x7f1ddd1fa000, 138412032 [pid 743] <... prctl resumed>) = 0 [pid 743] setpgid(0, 0 [pid 741] <... munmap resumed>) = 0 [pid 743] <... setpgid resumed>) = 0 [pid 742] <... munmap resumed>) = 0 [pid 741] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 742] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 743] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 741] <... openat resumed>) = 4 [pid 742] ioctl(4, LOOP_SET_FD, 3 [pid 743] <... openat resumed>) = 3 [pid 742] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 742] ioctl(4, LOOP_CLR_FD) = 0 [pid 743] write(3, "1000", 4 [pid 741] ioctl(4, LOOP_SET_FD, 3 [pid 743] <... write resumed>) = 4 [pid 741] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 743] close(3 [pid 741] ioctl(4, LOOP_CLR_FD [pid 743] <... close resumed>) = 0 [pid 741] <... ioctl resumed>) = 0 [pid 742] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 742] close(4) = 0 [pid 743] write(1, "executing program\n", 18 [pid 742] close(3executing program executing program [pid 743] <... write resumed>) = 18 [pid 740] <... open resumed>) = 3 ./strace-static-x86_64: Process 744 attached [pid 740] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 744] set_robust_list(0x55555671f660, 24 [pid 740] <... mount resumed>) = 0 [pid 742] <... close resumed>) = 0 [pid 744] <... set_robust_list resumed>) = 0 [pid 744] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 740] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 744] <... prctl resumed>) = 0 [pid 740] <... open resumed>) = 4 [pid 744] setpgid(0, 0) = 0 [pid 744] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 740] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 744] <... openat resumed>) = 3 [pid 744] write(3, "1000", 4) = 4 [pid 744] close(3) = 0 [pid 744] write(1, "executing program\n", 18) = 18 [pid 744] memfd_create("syzkaller", 0) = 3 [pid 744] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 740] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 740] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 740] exit_group(0) = ? [pid 740] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=740, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 743] memfd_create("syzkaller", 0 [pid 742] chdir("./file0") = 0 [pid 743] <... memfd_create resumed>) = 3 [pid 742] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 743] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 742] <... open resumed>) = 3 [pid 742] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 744] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 742] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 742] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 742] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 742] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 742] exit_group(0) = ? [pid 743] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 741] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 741] close(4) = 0 [pid 741] close(3 [pid 742] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=742, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 745 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 741] <... close resumed>) = 0 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 746 [pid 741] chdir("./file0") = 0 [pid 741] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 741] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 741] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 741] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 741] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 746 attached [pid 746] set_robust_list(0x55555671f660, 24) = 0 [pid 746] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 741] <... openat resumed>) = 5 [pid 741] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 746] <... prctl resumed>) = 0 [pid 741] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 741] exit_group(0) = ? [pid 741] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=741, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 746] setpgid(0, 0) = 0 [pid 746] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 746] write(3, "1000", 4) = 4 [pid 746] close(3) = 0 executing program [pid 746] write(1, "executing program\n", 18) = 18 [pid 746] memfd_create("syzkaller", 0) = 3 [pid 746] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 747 ./strace-static-x86_64: Process 745 attached [pid 745] set_robust_list(0x55555671f660, 24) = 0 [pid 744] <... write resumed>) = 1048576 [pid 745] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 744] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 744] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 744] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 744] ioctl(4, LOOP_CLR_FD) = 0 [pid 743] <... write resumed>) = 1048576 [pid 745] <... prctl resumed>) = 0 [pid 746] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 744] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 744] close(4) = 0 [pid 744] close(3) = 0 ./strace-static-x86_64: Process 747 attached [pid 747] set_robust_list(0x55555671f660, 24) = 0 [pid 747] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 744] chdir("./file0") = 0 [pid 747] <... prctl resumed>) = 0 [pid 745] setpgid(0, 0 [pid 743] munmap(0x7f1ddd1fa000, 138412032 [pid 745] <... setpgid resumed>) = 0 [pid 743] <... munmap resumed>) = 0 [pid 744] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 745] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 743] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 745] write(3, "1000", 4 [pid 743] <... openat resumed>) = 4 [pid 747] setpgid(0, 0) = 0 [pid 745] <... write resumed>) = 4 [pid 743] ioctl(4, LOOP_SET_FD, 3 [pid 745] close(3 [pid 743] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 745] <... close resumed>) = 0 [pid 743] ioctl(4, LOOP_CLR_FD [pid 745] write(1, "executing program\n", 18 [pid 743] <... ioctl resumed>) = 0 executing program [pid 745] <... write resumed>) = 18 [pid 744] <... open resumed>) = 3 [pid 747] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 745] memfd_create("syzkaller", 0 [pid 744] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 745] <... memfd_create resumed>) = 3 [pid 744] <... mount resumed>) = 0 [pid 747] <... openat resumed>) = 3 [pid 745] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 747] write(3, "1000", 4) = 4 [pid 747] close(3) = 0 executing program [pid 747] write(1, "executing program\n", 18) = 18 [pid 747] memfd_create("syzkaller", 0 [pid 745] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 744] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 747] <... memfd_create resumed>) = 3 [pid 747] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 744] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 744] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 744] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 744] exit_group(0) = ? [pid 743] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 743] close(4 [pid 744] +++ exited with 0 +++ [pid 743] <... close resumed>) = 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=744, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 743] close(3 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 748 [pid 743] <... close resumed>) = 0 [pid 743] chdir("./file0") = 0 [pid 743] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 743] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 745] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 743] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 743] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 747] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 746] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 748 attached [pid 748] set_robust_list(0x55555671f660, 24 [pid 743] <... mmap resumed>) = 0x20000000 [pid 746] munmap(0x7f1ddd1fa000, 138412032executing program ) = 0 [pid 743] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 748] <... set_robust_list resumed>) = 0 [pid 748] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 748] setpgid(0, 0) = 0 [pid 748] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 746] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 746] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 748] <... openat resumed>) = 3 [pid 746] ioctl(4, LOOP_CLR_FD) = 0 [pid 748] write(3, "1000", 4) = 4 [pid 748] close(3) = 0 [pid 748] write(1, "executing program\n", 18) = 18 [pid 745] <... write resumed>) = 1048576 [pid 746] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 746] close(4) = 0 [pid 746] close(3 [pid 743] <... openat resumed>) = 5 [pid 745] munmap(0x7f1ddd1fa000, 138412032 [pid 748] memfd_create("syzkaller", 0 [pid 743] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 748] <... memfd_create resumed>) = 3 [pid 743] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 748] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 743] exit_group(0 [pid 748] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 743] <... exit_group resumed>) = ? [pid 743] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=743, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 745] <... munmap resumed>) = 0 [pid 745] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 745] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 745] ioctl(4, LOOP_CLR_FD [pid 296] <... restart_syscall resumed>) = 0 [pid 745] <... ioctl resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 749 [pid 748] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 745] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 749 attached ) = -1 EBUSY (Device or resource busy) [pid 749] set_robust_list(0x55555671f660, 24 [pid 745] close(4) = 0 [pid 749] <... set_robust_list resumed>) = 0 [pid 745] close(3 [pid 749] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 747] <... write resumed>) = 1048576 [pid 746] <... close resumed>) = 0 [pid 746] chdir("./file0") = 0 [pid 746] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 746] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 745] <... close resumed>) = 0 [pid 746] <... mount resumed>) = 0 [pid 746] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 749] <... prctl resumed>) = 0 [pid 745] chdir("./file0" [pid 746] <... open resumed>) = 4 [pid 749] setpgid(0, 0 [pid 745] <... chdir resumed>) = 0 [pid 746] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 749] <... setpgid resumed>) = 0 [pid 745] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 749] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 745] <... open resumed>) = 3 [pid 747] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 749] <... openat resumed>) = 3 [pid 745] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 749] write(3, "1000", 4) = 4 [pid 745] <... mount resumed>) = 0 [pid 747] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 749] close(3 [pid 745] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 747] <... openat resumed>) = 4 [pid 747] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 747] ioctl(4, LOOP_CLR_FD [pid 749] <... close resumed>) = 0 [pid 745] <... open resumed>) = 4 [pid 747] <... ioctl resumed>) = 0 [pid 749] write(1, "executing program\n", 18 [pid 745] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 749] <... write resumed>) = 18 [pid 746] <... mmap resumed>) = 0x20000000 [pid 746] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 746] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 746] exit_group(0 [pid 747] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 745] <... mmap resumed>) = 0x20000000 [pid 747] close(4 [pid 749] memfd_create("syzkaller", 0 [pid 747] <... close resumed>) = 0 [pid 747] close(3 [pid 749] <... memfd_create resumed>) = 3 [pid 745] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 749] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 745] <... openat resumed>) = 5 [pid 749] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 747] <... close resumed>) = 0 [pid 746] <... exit_group resumed>) = ? [pid 745] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 746] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=746, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 747] chdir("./file0") = 0 [pid 747] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 295] <... restart_syscall resumed>) = 0 [pid 749] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 745] exit_group(0 [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 745] <... exit_group resumed>) = ? [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 750 [pid 745] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=745, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 747] <... open resumed>) = 3 [pid 747] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 747] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 747] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 748] <... write resumed>) = 1048576 [pid 747] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 747] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 747] exit_group(0) = ? [pid 747] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=747, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 750 attached [pid 750] set_robust_list(0x55555671f660, 24) = 0 [pid 750] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 750] setpgid(0, 0) = 0 [pid 750] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 750] write(3, "1000", 4) = 4 [pid 750] close(3) = 0 [pid 750] write(1, "executing program\n", 18executing program ) = 18 [pid 750] memfd_create("syzkaller", 0) = 3 [pid 748] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 750] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 752 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 751 [pid 748] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 749] <... write resumed>) = 1048576 [pid 748] <... openat resumed>) = 4 [pid 748] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 748] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 752 attached [pid 749] munmap(0x7f1ddd1fa000, 138412032 [pid 752] set_robust_list(0x55555671f660, 24) = 0 [pid 752] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 752] setpgid(0, 0 [pid 748] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 748] close(4) = 0 [pid 748] close(3 [pid 752] <... setpgid resumed>) = 0 [pid 749] <... munmap resumed>) = 0 [pid 752] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 749] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 752] <... openat resumed>) = 3 [pid 752] write(3, "1000", 4 [pid 749] <... openat resumed>) = 4 [pid 752] <... write resumed>) = 4 [pid 749] ioctl(4, LOOP_SET_FD, 3 [pid 752] close(3 [pid 749] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 752] <... close resumed>) = 0 [pid 749] ioctl(4, LOOP_CLR_FDexecuting program [pid 752] write(1, "executing program\n", 18 [pid 749] <... ioctl resumed>) = 0 [pid 752] <... write resumed>) = 18 [pid 752] memfd_create("syzkaller", 0) = 3 [pid 752] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 748] <... close resumed>) = 0 ./strace-static-x86_64: Process 751 attached [pid 751] set_robust_list(0x55555671f660, 24) = 0 [pid 751] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 749] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 751] <... prctl resumed>) = 0 [pid 751] setpgid(0, 0executing program [pid 749] close(4 [pid 751] <... setpgid resumed>) = 0 [pid 751] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 748] chdir("./file0") = 0 [pid 748] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 751] <... openat resumed>) = 3 [pid 751] write(3, "1000", 4) = 4 [pid 751] close(3) = 0 [pid 751] write(1, "executing program\n", 18) = 18 [pid 751] memfd_create("syzkaller", 0) = 3 [pid 748] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 751] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 749] <... close resumed>) = 0 [pid 748] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 749] close(3 [pid 748] <... open resumed>) = 4 [pid 748] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 749] <... close resumed>) = 0 [pid 748] <... mmap resumed>) = 0x20000000 [pid 748] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 748] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 748] exit_group(0) = ? [pid 748] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=748, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 752] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 753 [pid 749] chdir("./file0") = 0 [pid 749] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 750] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 749] <... open resumed>) = 3 [pid 749] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 749] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 749] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 749] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 749] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 749] exit_group(0) = ? [pid 749] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=749, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 753 attached [pid 753] set_robust_list(0x55555671f660, 24) = 0 [pid 753] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 753] setpgid(0, 0) = 0 [pid 753] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 751] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576executing program [pid 753] <... openat resumed>) = 3 [pid 753] write(3, "1000", 4) = 4 [pid 753] close(3) = 0 [pid 753] write(1, "executing program\n", 18) = 18 [pid 753] memfd_create("syzkaller", 0) = 3 [pid 753] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 754 [pid 752] <... write resumed>) = 1048576 [pid 752] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 750] <... write resumed>) = 1048576 [pid 750] munmap(0x7f1ddd1fa000, 138412032 [pid 752] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 750] <... munmap resumed>) = 0 [pid 752] <... openat resumed>) = 4 [pid 750] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 750] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 752] ioctl(4, LOOP_SET_FD, 3 [pid 750] ioctl(4, LOOP_CLR_FD) = 0 [pid 752] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 752] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 754 attached [pid 750] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 750] close(4) = 0 [pid 750] close(3 [pid 754] set_robust_list(0x55555671f660, 24) = 0 [pid 754] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 752] ioctl(4, LOOP_SET_FD, 3 [pid 754] setpgid(0, 0 [pid 752] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 752] close(4 [pid 754] <... setpgid resumed>) = 0 [pid 752] <... close resumed>) = 0 [pid 752] close(3 [pid 754] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 750] <... close resumed>) = 0 [pid 754] <... openat resumed>) = 3 [pid 750] chdir("./file0") = 0 [pid 750] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 754] write(3, "1000", 4) = 4 [pid 754] close(3 [pid 751] <... write resumed>) = 1048576 [pid 754] <... close resumed>) = 0 [pid 752] <... close resumed>) = 0 [pid 751] munmap(0x7f1ddd1fa000, 138412032 [pid 754] write(1, "executing program\n", 18 executing program [pid 752] chdir("./file0" [pid 754] <... write resumed>) = 18 [pid 752] <... chdir resumed>) = 0 [pid 754] memfd_create("syzkaller", 0 [pid 752] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 751] <... munmap resumed>) = 0 [pid 750] <... open resumed>) = 3 [pid 754] <... memfd_create resumed>) = 3 [pid 751] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 754] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 752] <... open resumed>) = 3 [pid 754] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 752] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 751] <... openat resumed>) = 4 [pid 750] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 751] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 751] ioctl(4, LOOP_CLR_FD) = 0 [pid 753] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 750] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 750] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 752] <... mount resumed>) = 0 [pid 752] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 751] ioctl(4, LOOP_SET_FD, 3 [pid 752] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 751] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 751] close(4) = 0 [pid 751] close(3 [pid 752] <... mmap resumed>) = 0x20000000 [pid 750] <... mmap resumed>) = 0x20000000 [pid 753] <... write resumed>) = 1048576 [pid 750] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 750] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 750] exit_group(0) = ? [pid 750] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=750, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 751] <... close resumed>) = 0 [pid 751] chdir("./file0") = 0 [pid 751] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 751] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 751] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 751] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 751] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 751] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 751] exit_group(0) = ? [pid 751] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=751, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 753] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 753] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 753] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 753] ioctl(4, LOOP_CLR_FD) = 0 [pid 754] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 752] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 752] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 753] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 753] close(4) = 0 [pid 753] close(3) = 0 [pid 752] exit_group(0 [pid 753] chdir("./file0" [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 752] <... exit_group resumed>) = ? [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 295] close(3 [pid 298] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 752] +++ exited with 0 +++ [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 755 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 756 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=752, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 753] <... chdir resumed>) = 0 [pid 753] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 753] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 756 attached [pid 754] <... write resumed>) = 1048576 [pid 753] <... mount resumed>) = 0 [pid 753] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 754] munmap(0x7f1ddd1fa000, 138412032 [pid 753] <... open resumed>) = 4 [pid 756] set_robust_list(0x55555671f660, 24 [pid 753] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 754] <... munmap resumed>) = 0 [pid 753] <... mmap resumed>) = 0x20000000 [pid 753] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 753] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 753] exit_group(0) = ? [pid 754] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 756] <... set_robust_list resumed>) = 0 [pid 754] <... openat resumed>) = 4 [pid 756] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 754] ioctl(4, LOOP_SET_FD, 3 [pid 756] <... prctl resumed>) = 0 [pid 754] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 754] ioctl(4, LOOP_CLR_FD [pid 756] setpgid(0, 0) = 0 [pid 754] <... ioctl resumed>) = 0 [pid 756] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 753] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=753, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 755 attached [pid 756] <... openat resumed>) = 3 [pid 755] set_robust_list(0x55555671f660, 24 [pid 756] write(3, "1000", 4 [pid 755] <... set_robust_list resumed>) = 0 [pid 755] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 755] setpgid(0, 0) = 0 [pid 756] <... write resumed>) = 4 [pid 755] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 756] close(3 [pid 754] ioctl(4, LOOP_SET_FD, 3 [pid 755] <... openat resumed>) = 3 [pid 754] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 755] write(3, "1000", 4) = 4 [pid 755] close(3executing program ) = 0 [pid 755] write(1, "executing program\n", 18) = 18 [pid 756] <... close resumed>) = 0 [pid 754] close(4 [pid 755] memfd_create("syzkaller", 0) = 3 [pid 754] <... close resumed>) = 0 [pid 755] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 754] close(3 [pid 756] write(1, "executing program\n", 18 [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] close(3 [pid 299] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 758 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 757 [pid 754] <... close resumed>) = 0 executing program [pid 756] <... write resumed>) = 18 [pid 756] memfd_create("syzkaller", 0) = 3 [pid 756] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 754] chdir("./file0" [pid 756] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 754] <... chdir resumed>) = 0 ./strace-static-x86_64: Process 758 attached [pid 758] set_robust_list(0x55555671f660, 24) = 0 executing program [pid 758] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 758] setpgid(0, 0) = 0 [pid 758] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 758] write(3, "1000", 4) = 4 [pid 758] close(3) = 0 [pid 758] write(1, "executing program\n", 18) = 18 [pid 758] memfd_create("syzkaller", 0 [pid 755] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 758] <... memfd_create resumed>) = 3 [pid 758] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 754] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 ./strace-static-x86_64: Process 757 attached [pid 757] set_robust_list(0x55555671f660, 24) = 0 [pid 754] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 757] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 757] setpgid(0, 0) = 0 executing program [pid 757] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 754] <... mount resumed>) = 0 [pid 757] <... openat resumed>) = 3 [pid 757] write(3, "1000", 4) = 4 [pid 757] close(3) = 0 [pid 757] write(1, "executing program\n", 18) = 18 [pid 757] memfd_create("syzkaller", 0) = 3 [pid 757] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 756] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 757] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 754] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 754] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 754] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 754] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 754] exit_group(0) = ? [pid 754] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=754, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 756] <... write resumed>) = 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 759 [pid 757] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 756] munmap(0x7f1ddd1fa000, 138412032 [pid 758] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 759 attached [pid 756] <... munmap resumed>) = 0 [pid 756] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 759] set_robust_list(0x55555671f660, 24 [pid 756] <... openat resumed>) = 4 [pid 759] <... set_robust_list resumed>) = 0 [pid 756] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 759] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 756] ioctl(4, LOOP_CLR_FD) = 0 [pid 759] <... prctl resumed>) = 0 [pid 759] setpgid(0, 0) = 0 [pid 755] <... write resumed>) = 1048576 [pid 755] munmap(0x7f1ddd1fa000, 138412032 [pid 756] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 759] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 756] close(4) = 0 [pid 756] close(3 [pid 759] <... openat resumed>) = 3 [pid 755] <... munmap resumed>) = 0 [pid 755] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 759] write(3, "1000", 4 [pid 755] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 755] ioctl(4, LOOP_CLR_FD) = 0 [pid 758] <... write resumed>) = 1048576 [pid 758] munmap(0x7f1ddd1fa000, 138412032 [pid 759] <... write resumed>) = 4 [pid 759] close(3) = 0 [pid 758] <... munmap resumed>) = 0 [pid 758] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 759] write(1, "executing program\n", 18 [pid 755] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 755] close(4) = 0 executing program [pid 755] close(3 [pid 759] <... write resumed>) = 18 [pid 759] memfd_create("syzkaller", 0) = 3 [pid 759] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 755] <... close resumed>) = 0 [pid 758] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 758] ioctl(4, LOOP_CLR_FD) = 0 [pid 755] chdir("./file0") = 0 [pid 755] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 756] <... close resumed>) = 0 [pid 756] chdir("./file0" [pid 755] <... open resumed>) = 3 [pid 756] <... chdir resumed>) = 0 [pid 755] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 756] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 758] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 758] close(4) = 0 [pid 758] close(3 [pid 756] <... open resumed>) = 3 [pid 756] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 755] <... mount resumed>) = 0 [pid 756] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 758] <... close resumed>) = 0 [pid 755] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 757] <... write resumed>) = 1048576 [pid 755] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 757] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 757] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 757] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 757] ioctl(4, LOOP_CLR_FD) = 0 [pid 755] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 755] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 755] exit_group(0) = ? [pid 755] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=755, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 757] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 757] close(4) = 0 [pid 757] close(3 [pid 758] chdir("./file0") = 0 [pid 758] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 757] <... close resumed>) = 0 [pid 758] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 758] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 758] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 756] <... open resumed>) = 4 [pid 758] <... mmap resumed>) = 0x20000000 [pid 757] chdir("./file0") = 0 [pid 758] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 757] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 758] <... openat resumed>) = 5 [pid 757] <... open resumed>) = 3 [pid 758] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 758] exit_group(0) = ? [pid 758] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=758, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 757] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 757] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 757] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 759] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 756] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 756] <... mmap resumed>) = 0x20000000 [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 756] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 756] <... openat resumed>) = 5 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 760 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 761 [pid 756] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 757] <... mmap resumed>) = 0x20000000 [pid 756] exit_group(0 [pid 757] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 756] <... exit_group resumed>) = ? [pid 757] <... openat resumed>) = 5 [pid 757] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 757] exit_group(0) = ? [pid 756] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=756, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 757] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=757, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 760 attached ./strace-static-x86_64: Process 761 attached [pid 761] set_robust_list(0x55555671f660, 24 [pid 760] set_robust_list(0x55555671f660, 24 [pid 761] <... set_robust_list resumed>) = 0 [pid 760] <... set_robust_list resumed>) = 0 [pid 761] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 760] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 761] <... prctl resumed>) = 0 [pid 760] setpgid(0, 0 [pid 761] setpgid(0, 0) = 0 [pid 760] <... setpgid resumed>) = 0 [pid 761] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 760] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 761] <... openat resumed>) = 3 [pid 761] write(3, "1000", 4) = 4 [pid 760] write(3, "1000", 4) = 4 [pid 761] close(3 [pid 760] close(3) = 0 [pid 761] <... close resumed>) = 0 [pid 760] write(1, "executing program\n", 18executing program executing program [pid 761] write(1, "executing program\n", 18 [pid 760] <... write resumed>) = 18 [pid 761] <... write resumed>) = 18 [pid 760] memfd_create("syzkaller", 0 [pid 761] memfd_create("syzkaller", 0) = 3 [pid 760] <... memfd_create resumed>) = 3 [pid 760] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 761] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 760] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 761] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 759] <... write resumed>) = 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 759] munmap(0x7f1ddd1fa000, 138412032 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 295] close(3 [pid 297] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 759] <... munmap resumed>) = 0 [pid 759] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 763 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 762 [pid 759] <... openat resumed>) = 4 [pid 759] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 759] ioctl(4, LOOP_CLR_FD) = 0 [pid 759] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 762 attached ) = -1 EBUSY (Device or resource busy) [pid 759] close(4 [pid 762] set_robust_list(0x55555671f660, 24 [pid 759] <... close resumed>) = 0 [pid 762] <... set_robust_list resumed>) = 0 [pid 759] close(3) = 0 [pid 759] chdir("./file0" [pid 762] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 759] <... chdir resumed>) = 0 [pid 762] <... prctl resumed>) = 0 [pid 759] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 762] setpgid(0, 0 [pid 759] <... open resumed>) = 3 [pid 762] <... setpgid resumed>) = 0 [pid 759] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 763 attached ) = 0 [pid 763] set_robust_list(0x55555671f660, 24) = 0 [pid 763] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 763] setpgid(0, 0) = 0 [pid 759] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 762] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 763] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 759] <... open resumed>) = 4 [pid 762] <... openat resumed>) = 3 [pid 763] <... openat resumed>) = 3 [pid 759] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 763] write(3, "1000", 4) = 4 [pid 763] close(3) = 0 executing program [pid 763] write(1, "executing program\n", 18) = 18 [pid 763] memfd_create("syzkaller", 0) = 3 [pid 759] <... mmap resumed>) = 0x20000000 [pid 763] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 762] write(3, "1000", 4 [pid 759] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 762] <... write resumed>) = 4 [pid 759] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 762] close(3) = 0 [pid 759] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 759] exit_group(0 [pid 762] write(1, "executing program\n", 18 [pid 760] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 763] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576executing program [pid 759] <... exit_group resumed>) = ? [pid 762] <... write resumed>) = 18 [pid 761] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 759] +++ exited with 0 +++ [pid 762] memfd_create("syzkaller", 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=759, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 762] <... memfd_create resumed>) = 3 [pid 762] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 761] <... write resumed>) = 1048576 [pid 762] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 760] <... write resumed>) = 1048576 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 764 [pid 761] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 761] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 760] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 761] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 761] ioctl(4, LOOP_CLR_FD) = 0 [pid 760] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 760] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 760] ioctl(4, LOOP_CLR_FD) = 0 [pid 762] <... write resumed>) = 1048576 [pid 761] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 761] close(4) = 0 [pid 761] close(3) = 0 [pid 760] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 760] close(4) = 0 [pid 760] close(3 [pid 762] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 764 attached ) = 0 [pid 762] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 764] set_robust_list(0x55555671f660, 24 [pid 762] <... openat resumed>) = 4 [pid 764] <... set_robust_list resumed>) = 0 [pid 762] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 762] ioctl(4, LOOP_CLR_FD [pid 764] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 763] <... write resumed>) = 1048576 [pid 762] <... ioctl resumed>) = 0 [pid 761] chdir("./file0" [pid 760] <... close resumed>) = 0 [pid 761] <... chdir resumed>) = 0 [pid 760] chdir("./file0" [pid 763] munmap(0x7f1ddd1fa000, 138412032 [pid 761] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 760] <... chdir resumed>) = 0 [pid 764] <... prctl resumed>) = 0 [pid 763] <... munmap resumed>) = 0 [pid 764] setpgid(0, 0) = 0 [pid 761] <... open resumed>) = 3 [pid 760] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 764] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 764] write(3, "1000", 4) = 4 [pid 762] ioctl(4, LOOP_SET_FD, 3 [pid 764] close(3 [pid 762] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program [pid 764] <... close resumed>) = 0 [pid 762] close(4 [pid 764] write(1, "executing program\n", 18 [pid 762] <... close resumed>) = 0 [pid 764] <... write resumed>) = 18 [pid 762] close(3 [pid 764] memfd_create("syzkaller", 0 [pid 762] <... close resumed>) = 0 [pid 764] <... memfd_create resumed>) = 3 [pid 764] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 762] chdir("./file0" [pid 763] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 761] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 760] <... open resumed>) = 3 [pid 763] <... openat resumed>) = 4 [pid 762] <... chdir resumed>) = 0 [pid 763] ioctl(4, LOOP_SET_FD, 3 [pid 761] <... mount resumed>) = 0 [pid 760] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 763] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 761] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 763] ioctl(4, LOOP_CLR_FD [pid 760] <... mount resumed>) = 0 [pid 761] <... open resumed>) = 4 [pid 763] <... ioctl resumed>) = 0 [pid 760] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 761] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 760] <... open resumed>) = 4 [pid 762] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 762] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 761] <... mmap resumed>) = 0x20000000 [pid 760] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 762] <... mount resumed>) = 0 [pid 762] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 760] <... mmap resumed>) = 0x20000000 [pid 761] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 760] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 763] ioctl(4, LOOP_SET_FD, 3 [pid 761] <... openat resumed>) = 5 [pid 763] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 761] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 760] <... openat resumed>) = 5 [pid 763] close(4) = 0 [pid 762] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 761] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 760] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 763] close(3 [pid 761] exit_group(0 [pid 762] <... mmap resumed>) = 0x20000000 [pid 764] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 763] <... close resumed>) = 0 [pid 761] <... exit_group resumed>) = ? [pid 760] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 763] chdir("./file0" [pid 762] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 762] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 762] exit_group(0 [pid 761] +++ exited with 0 +++ [pid 763] <... chdir resumed>) = 0 [pid 760] exit_group(0 [pid 763] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 760] <... exit_group resumed>) = ? [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=761, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 762] <... exit_group resumed>) = ? [pid 763] <... open resumed>) = 3 [pid 763] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 762] +++ exited with 0 +++ [pid 760] +++ exited with 0 +++ [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 763] <... mount resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=760, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=762, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 763] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 763] <... open resumed>) = 4 [pid 763] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 763] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] <... restart_syscall resumed>) = 0 [pid 763] <... openat resumed>) = 5 [pid 763] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 763] exit_group(0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 763] <... exit_group resumed>) = ? [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] <... openat resumed>) = 3 [pid 763] +++ exited with 0 +++ [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=763, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] <... ioctl resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 299] close(3 [pid 298] <... openat resumed>) = 3 [pid 299] <... close resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... ioctl resumed>) = 0 [pid 295] <... openat resumed>) = 3 [pid 298] close(3 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 765 [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... ioctl resumed>) = 0 [pid 295] close(3 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 766 [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 767 [pid 764] <... write resumed>) = 1048576 [pid 764] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 764] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 764] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 764] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 765 attached [pid 765] set_robust_list(0x55555671f660, 24) = 0 [pid 765] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 765] setpgid(0, 0 [pid 764] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 764] close(4) = 0 [pid 764] close(3 [pid 297] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 767 attached ./strace-static-x86_64: Process 766 attached [pid 767] set_robust_list(0x55555671f660, 24 [pid 766] set_robust_list(0x55555671f660, 24 [pid 767] <... set_robust_list resumed>) = 0 [pid 766] <... set_robust_list resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 766] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 297] ioctl(3, LOOP_CLR_FD [pid 767] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 766] <... prctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 767] <... prctl resumed>) = 0 [pid 767] setpgid(0, 0 [pid 766] setpgid(0, 0 [pid 297] close(3 [pid 767] <... setpgid resumed>) = 0 [pid 766] <... setpgid resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 765] <... setpgid resumed>) = 0 [pid 765] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 767] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 766] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 768 [pid 766] <... openat resumed>) = 3 [pid 767] <... openat resumed>) = 3 [pid 766] write(3, "1000", 4 [pid 767] write(3, "1000", 4 [pid 766] <... write resumed>) = 4 [pid 767] <... write resumed>) = 4 [pid 766] close(3 [pid 767] close(3executing program executing program ) = 0 [pid 766] <... close resumed>) = 0 [pid 767] write(1, "executing program\n", 18 [pid 766] write(1, "executing program\n", 18 [pid 767] <... write resumed>) = 18 [pid 766] <... write resumed>) = 18 [pid 766] memfd_create("syzkaller", 0 [pid 767] memfd_create("syzkaller", 0 [pid 766] <... memfd_create resumed>) = 3 [pid 767] <... memfd_create resumed>) = 3 [pid 766] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 767] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 766] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 765] write(3, "1000", 4) = 4 [pid 765] close(3) = 0 [pid 765] write(1, "executing program\n", 18executing program ) = 18 [pid 765] memfd_create("syzkaller", 0) = 3 [pid 765] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 764] <... close resumed>) = 0 [pid 766] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 764] chdir("./file0"./strace-static-x86_64: Process 768 attached [pid 767] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 766] <... write resumed>) = 1048576 [pid 765] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 768] set_robust_list(0x55555671f660, 24 [pid 765] <... write resumed>) = 1048576 [pid 764] <... chdir resumed>) = 0 [pid 768] <... set_robust_list resumed>) = 0 [pid 764] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 768] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 764] <... open resumed>) = 3 [pid 768] <... prctl resumed>) = 0 [pid 764] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 768] setpgid(0, 0 [pid 764] <... mount resumed>) = 0 [pid 768] <... setpgid resumed>) = 0 [pid 764] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 768] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 764] <... open resumed>) = 4 [pid 768] <... openat resumed>) = 3 [pid 764] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 768] write(3, "1000", 4 [pid 764] <... mmap resumed>) = 0x20000000 [pid 768] <... write resumed>) = 4 [pid 768] close(3) = 0 executing program [pid 768] write(1, "executing program\n", 18) = 18 [pid 768] memfd_create("syzkaller", 0) = 3 [pid 764] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 768] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 764] <... openat resumed>) = 5 [pid 768] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 764] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 768] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 764] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 764] exit_group(0) = ? [pid 764] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=764, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 766] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 766] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 765] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 766] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 766] ioctl(4, LOOP_CLR_FD) = 0 [pid 765] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 765] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 765] ioctl(4, LOOP_CLR_FD) = 0 [pid 766] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 766] close(4) = 0 [pid 766] close(3) = 0 [pid 765] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 765] close(4) = 0 [pid 765] close(3) = 0 [pid 766] chdir("./file0" [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 766] <... chdir resumed>) = 0 [pid 766] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 769 [pid 765] chdir("./file0") = 0 [pid 765] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 766] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 768] <... write resumed>) = 1048576 [pid 765] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 765] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 765] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 766] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 769 attached [pid 769] set_robust_list(0x55555671f660, 24 [pid 766] <... open resumed>) = 4 [pid 769] <... set_robust_list resumed>) = 0 [pid 766] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 769] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 766] <... mmap resumed>) = 0x20000000 [pid 769] <... prctl resumed>) = 0 [pid 769] setpgid(0, 0 [pid 766] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 769] <... setpgid resumed>) = 0 [pid 766] <... openat resumed>) = 5 [pid 769] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 766] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 765] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 769] <... openat resumed>) = 3 executing program [pid 769] write(3, "1000", 4 [pid 766] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 769] <... write resumed>) = 4 [pid 769] close(3 [pid 765] <... openat resumed>) = 5 [pid 769] <... close resumed>) = 0 [pid 766] exit_group(0 [pid 769] write(1, "executing program\n", 18 [pid 766] <... exit_group resumed>) = ? [pid 769] <... write resumed>) = 18 [pid 765] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 765] exit_group(0) = ? [pid 769] memfd_create("syzkaller", 0 [pid 766] +++ exited with 0 +++ [pid 765] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=766, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=765, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 769] <... memfd_create resumed>) = 3 [pid 768] munmap(0x7f1ddd1fa000, 138412032 [pid 767] <... write resumed>) = 1048576 [pid 769] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 769] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 767] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 767] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 767] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 767] ioctl(4, LOOP_CLR_FD) = 0 [pid 768] <... munmap resumed>) = 0 [pid 768] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 768] ioctl(4, LOOP_SET_FD, 3 [pid 767] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 767] close(4) = 0 [pid 767] close(3) = 0 [pid 768] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 769] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 768] ioctl(4, LOOP_CLR_FD) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 767] chdir("./file0") = 0 [pid 767] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 770 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 771 [pid 768] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 768] close(4) = 0 [pid 768] close(3) = 0 [pid 767] <... open resumed>) = 3 [pid 769] <... write resumed>) = 1048576 [pid 767] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 768] chdir("./file0") = 0 [pid 768] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 767] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 767] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 768] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 768] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 768] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 767] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 767] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 767] exit_group(0) = ? [pid 768] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 768] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 767] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=767, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 768] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 768] exit_group(0) = ? [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 772 ./strace-static-x86_64: Process 771 attached [pid 768] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=768, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 770 attached [pid 770] set_robust_list(0x55555671f660, 24) = 0 [pid 770] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 770] setpgid(0, 0 [pid 771] set_robust_list(0x55555671f660, 24 [pid 769] munmap(0x7f1ddd1fa000, 138412032 [pid 770] <... setpgid resumed>) = 0 [pid 771] <... set_robust_list resumed>) = 0 [pid 770] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 770] write(3, "1000", 4) = 4 [pid 769] <... munmap resumed>) = 0 [pid 770] close(3 [pid 771] prctl(PR_SET_PDEATHSIG, SIGKILLexecuting program [pid 769] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 770] <... close resumed>) = 0 [pid 770] write(1, "executing program\n", 18) = 18 [pid 770] memfd_create("syzkaller", 0) = 3 [pid 770] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 771] <... prctl resumed>) = 0 [pid 770] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 769] <... openat resumed>) = 4 [pid 771] setpgid(0, 0 [pid 769] ioctl(4, LOOP_SET_FD, 3 [pid 771] <... setpgid resumed>) = 0 [pid 769] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 771] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 769] ioctl(4, LOOP_CLR_FD [pid 771] <... openat resumed>) = 3 [pid 769] <... ioctl resumed>) = 0 [pid 771] write(3, "1000", 4) = 4 [pid 771] close(3./strace-static-x86_64: Process 772 attached [pid 772] set_robust_list(0x55555671f660, 24) = 0 [pid 772] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 771] <... close resumed>) = 0 [pid 772] <... prctl resumed>) = 0 [pid 771] write(1, "executing program\n", 18 [pid 772] setpgid(0, 0) = 0 executing program [pid 772] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 771] <... write resumed>) = 18 [pid 771] memfd_create("syzkaller", 0) = 3 [pid 769] ioctl(4, LOOP_SET_FD, 3 [pid 772] <... openat resumed>) = 3 [pid 772] write(3, "1000", 4executing program ) = 4 [pid 771] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 769] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 772] close(3) = 0 [pid 772] write(1, "executing program\n", 18) = 18 [pid 772] memfd_create("syzkaller", 0 [pid 771] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 769] close(4 [pid 772] <... memfd_create resumed>) = 3 [pid 772] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 773 [pid 770] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 769] <... close resumed>) = 0 [pid 769] close(3./strace-static-x86_64: Process 773 attached [pid 773] set_robust_list(0x55555671f660, 24) = 0 [pid 773] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 769] <... close resumed>) = 0 [pid 773] <... prctl resumed>) = 0 [pid 773] setpgid(0, 0) = 0 [pid 773] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program [pid 769] chdir("./file0" [pid 773] <... openat resumed>) = 3 [pid 773] write(3, "1000", 4) = 4 [pid 773] close(3) = 0 [pid 773] write(1, "executing program\n", 18) = 18 [pid 773] memfd_create("syzkaller", 0) = 3 [pid 773] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 769] <... chdir resumed>) = 0 [pid 769] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 769] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 771] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 769] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 769] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 769] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 772] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 769] <... openat resumed>) = 5 [pid 769] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 769] exit_group(0) = ? [pid 769] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=769, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 773] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 770] <... write resumed>) = 1048576 [pid 771] <... write resumed>) = 1048576 [pid 771] munmap(0x7f1ddd1fa000, 138412032 [pid 770] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 771] <... munmap resumed>) = 0 [pid 770] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 770] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 770] ioctl(4, LOOP_CLR_FD) = 0 [pid 771] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 771] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 771] ioctl(4, LOOP_CLR_FD) = 0 [pid 770] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 770] close(4) = 0 [pid 770] close(3) = 0 [pid 771] ioctl(4, LOOP_SET_FD, 3 [pid 296] <... restart_syscall resumed>) = 0 [pid 771] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 771] close(4 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 774 [pid 771] <... close resumed>) = 0 [pid 771] close(3) = 0 [pid 771] chdir("./file0") = 0 [pid 771] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 772] <... write resumed>) = 1048576 [pid 772] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 772] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 772] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 772] ioctl(4, LOOP_CLR_FD) = 0 [pid 770] chdir("./file0") = 0 [pid 770] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 770] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 770] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 772] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 772] close(4) = 0 [pid 772] close(3 [pid 771] <... open resumed>) = 3 [pid 771] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 771] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 771] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 770] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 771] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 771] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 771] exit_group(0) = ? [pid 772] <... close resumed>) = 0 [pid 773] <... write resumed>) = 1048576 [pid 770] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 772] chdir("./file0") = 0 [pid 772] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 773] munmap(0x7f1ddd1fa000, 138412032 [pid 772] <... open resumed>) = 3 [pid 773] <... munmap resumed>) = 0 [pid 770] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 770] exit_group(0) = ? [pid 771] +++ exited with 0 +++ [pid 770] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=771, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=770, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 773] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 773] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 773] ioctl(4, LOOP_CLR_FD) = 0 [pid 772] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 772] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 772] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 773] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 773] close(4) = 0 [pid 773] close(3 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 772] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 772] <... openat resumed>) = 5 [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 772] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 772] exit_group(0) = ? [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 775 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 776 ./strace-static-x86_64: Process 774 attached [pid 774] set_robust_list(0x55555671f660, 24executing program ) = 0 [pid 773] <... close resumed>) = 0 [pid 772] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=772, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 777 [pid 773] chdir("./file0") = 0 [pid 773] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 773] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 773] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 773] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 775 attached [pid 775] set_robust_list(0x55555671f660, 24) = 0 [pid 775] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 775] setpgid(0, 0) = 0 [pid 775] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 775] write(3, "1000", 4) = 4 [pid 775] close(3) = 0 [pid 775] write(1, "executing program\n", 18) = 18 [pid 775] memfd_create("syzkaller", 0) = 3 [pid 775] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 773] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 773] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 773] exit_group(0) = ? [pid 774] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 776 attached ) = 0 [pid 776] set_robust_list(0x55555671f660, 24 [pid 774] setpgid(0, 0) = 0 [pid 776] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 777 attached [pid 777] set_robust_list(0x55555671f660, 24) = 0 [pid 777] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 777] setpgid(0, 0) = 0 [pid 773] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=773, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 774] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 776] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 297] <... restart_syscall resumed>) = 0 [pid 776] <... prctl resumed>) = 0 [pid 774] <... openat resumed>) = 3 [pid 776] setpgid(0, 0 [pid 774] write(3, "1000", 4 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 776] <... setpgid resumed>) = 0 [pid 774] <... write resumed>) = 4 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 778 [pid 777] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 776] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 774] close(3 [pid 777] <... openat resumed>) = 3 [pid 777] write(3, "1000", 4 [pid 774] <... close resumed>) = 0 [pid 777] <... write resumed>) = 4 [pid 777] close(3) = 0 executing program [pid 777] write(1, "executing program\n", 18 [pid 776] <... openat resumed>) = 3 [pid 774] write(1, "executing program\n", 18 [pid 777] <... write resumed>) = 18 executing program [pid 777] memfd_create("syzkaller", 0 [pid 774] <... write resumed>) = 18 [pid 776] write(3, "1000", 4 [pid 777] <... memfd_create resumed>) = 3 [pid 777] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 774] memfd_create("syzkaller", 0 [pid 776] <... write resumed>) = 4 [pid 774] <... memfd_create resumed>) = 3 [pid 776] close(3 [pid 774] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 776] <... close resumed>) = 0 [pid 774] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 776] write(1, "executing program\n", 18executing program ) = 18 [pid 776] memfd_create("syzkaller", 0) = 3 [pid 776] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 775] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 776] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 777] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 774] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 775] <... write resumed>) = 1048576 [pid 775] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 777] <... write resumed>) = 1048576 [pid 775] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 775] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 775] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 778 attached [pid 778] set_robust_list(0x55555671f660, 24) = 0 [pid 778] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 778] setpgid(0, 0) = 0 [pid 778] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXECexecuting program ) = 3 [pid 775] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 775] close(4) = 0 [pid 775] close(3) = 0 [pid 778] write(3, "1000", 4) = 4 [pid 778] close(3) = 0 [pid 778] write(1, "executing program\n", 18) = 18 [pid 778] memfd_create("syzkaller", 0 [pid 777] munmap(0x7f1ddd1fa000, 138412032 [pid 774] <... write resumed>) = 1048576 [pid 777] <... munmap resumed>) = 0 [pid 778] <... memfd_create resumed>) = 3 [pid 778] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 777] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 777] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 777] ioctl(4, LOOP_CLR_FD) = 0 [pid 775] chdir("./file0") = 0 [pid 775] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 775] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 777] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 777] close(4) = 0 [pid 777] close(3 [pid 775] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 775] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 777] <... close resumed>) = 0 [pid 775] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 775] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 775] exit_group(0 [pid 777] chdir("./file0" [pid 775] <... exit_group resumed>) = ? [pid 777] <... chdir resumed>) = 0 [pid 775] +++ exited with 0 +++ [pid 777] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=775, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 777] <... open resumed>) = 3 [pid 777] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 777] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 779 [pid 777] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 774] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 776] <... write resumed>) = 1048576 [pid 774] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 777] <... mmap resumed>) = 0x20000000 [pid 776] munmap(0x7f1ddd1fa000, 138412032 [pid 774] <... openat resumed>) = 4 ./strace-static-x86_64: Process 779 attached [pid 778] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 777] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 776] <... munmap resumed>) = 0 [pid 774] ioctl(4, LOOP_SET_FD, 3 [pid 777] <... openat resumed>) = 5 [pid 777] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 777] exit_group(0 [pid 774] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 776] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 777] <... exit_group resumed>) = ? [pid 774] ioctl(4, LOOP_CLR_FD [pid 776] <... openat resumed>) = 4 [pid 774] <... ioctl resumed>) = 0 [pid 776] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 776] ioctl(4, LOOP_CLR_FD) = 0 [pid 777] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=777, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 779] set_robust_list(0x55555671f660, 24) = 0 [pid 774] ioctl(4, LOOP_SET_FD, 3 [pid 779] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 774] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 779] <... prctl resumed>) = 0 [pid 779] setpgid(0, 0) = 0 [pid 779] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 774] close(4 [pid 779] <... openat resumed>) = 3 [pid 774] <... close resumed>) = 0 [pid 776] ioctl(4, LOOP_SET_FD, 3 [pid 774] close(3 [pid 776] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 779] write(3, "1000", 4) = 4 [pid 779] close(3) = 0 executing program [pid 779] write(1, "executing program\n", 18) = 18 [pid 779] memfd_create("syzkaller", 0) = 3 [pid 779] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 774] <... close resumed>) = 0 [pid 776] close(4) = 0 [pid 774] chdir("./file0" [pid 776] close(3) = 0 [pid 774] <... chdir resumed>) = 0 [pid 776] chdir("./file0" [pid 774] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 776] <... chdir resumed>) = 0 [pid 776] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 774] <... open resumed>) = 3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 776] <... open resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 774] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 776] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 774] <... mount resumed>) = 0 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 780 [pid 776] <... mount resumed>) = 0 [pid 774] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 776] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 774] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 776] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 774] <... mmap resumed>) = 0x20000000 [pid 778] <... write resumed>) = 1048576 [pid 778] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 778] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 776] <... mmap resumed>) = 0x20000000 [pid 774] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 778] <... openat resumed>) = 4 [pid 778] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 778] ioctl(4, LOOP_CLR_FD) = 0 [pid 776] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 774] <... openat resumed>) = 5 [pid 776] <... openat resumed>) = 5 [pid 774] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 776] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 774] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 776] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 774] exit_group(0 [pid 776] exit_group(0 [pid 774] <... exit_group resumed>) = ? [pid 776] <... exit_group resumed>) = ? [pid 778] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 778] close(4) = 0 [pid 778] close(3 [pid 774] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=774, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 776] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=776, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 779] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 778] <... close resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 296] close(3 [pid 298] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 781 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 782 [pid 778] chdir("./file0") = 0 [pid 778] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 778] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 778] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 778] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0./strace-static-x86_64: Process 780 attached [pid 780] set_robust_list(0x55555671f660, 24) = 0 [pid 778] <... mmap resumed>) = 0x20000000 [pid 780] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 778] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 780] setpgid(0, 0) = 0 [pid 778] <... openat resumed>) = 5 [pid 778] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 778] exit_group(0) = ? [pid 780] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 780] write(3, "1000", 4./strace-static-x86_64: Process 781 attached ) = 4 ./strace-static-x86_64: Process 782 attached [pid 782] set_robust_list(0x55555671f660, 24 [pid 780] close(3 [pid 781] set_robust_list(0x55555671f660, 24 [pid 782] <... set_robust_list resumed>) = 0 [pid 781] <... set_robust_list resumed>) = 0 [pid 782] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 781] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 782] <... prctl resumed>) = 0 [pid 781] setpgid(0, 0 [pid 782] setpgid(0, 0 [pid 780] <... close resumed>) = 0 [pid 781] <... setpgid resumed>) = 0 [pid 782] <... setpgid resumed>) = 0 [pid 781] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 780] write(1, "executing program\n", 18executing program ) = 18 [pid 782] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 781] <... openat resumed>) = 3 [pid 780] memfd_create("syzkaller", 0 [pid 782] <... openat resumed>) = 3 [pid 782] write(3, "1000", 4 [pid 781] write(3, "1000", 4 [pid 780] <... memfd_create resumed>) = 3 [pid 780] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 781] <... write resumed>) = 4 [pid 780] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 782] <... write resumed>) = 4 [pid 781] close(3) = 0 [pid 782] close(3) = 0 [pid 781] write(1, "executing program\n", 18 executing program executing program [pid 782] write(1, "executing program\n", 18 [pid 781] <... write resumed>) = 18 [pid 782] <... write resumed>) = 18 [pid 781] memfd_create("syzkaller", 0 [pid 782] memfd_create("syzkaller", 0 [pid 781] <... memfd_create resumed>) = 3 [pid 778] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=778, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 782] <... memfd_create resumed>) = 3 [pid 782] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 781] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 782] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 781] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 780] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 779] <... write resumed>) = 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 783 [pid 779] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 779] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 779] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 779] ioctl(4, LOOP_CLR_FD) = 0 [pid 779] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 779] close(4) = 0 [pid 779] close(3) = 0 [pid 779] chdir("./file0") = 0 [pid 779] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 781] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 779] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 779] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 779] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 779] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 779] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 779] exit_group(0./strace-static-x86_64: Process 783 attached ) = ? [pid 783] set_robust_list(0x55555671f660, 24) = 0 [pid 783] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 779] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=779, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 782] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 783] <... prctl resumed>) = 0 [pid 783] setpgid(0, 0) = 0 [pid 783] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 783] write(3, "1000", 4) = 4 [pid 783] close(3) = 0 [pid 783] write(1, "executing program\n", 18executing program ) = 18 [pid 783] memfd_create("syzkaller", 0) = 3 [pid 783] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 780] <... write resumed>) = 1048576 [pid 780] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 784 [pid 780] <... munmap resumed>) = 0 [pid 780] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 780] ioctl(4, LOOP_SET_FD, 3executing program ) = -1 EBUSY (Device or resource busy) [pid 781] <... write resumed>) = 1048576 [pid 782] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 784 attached [pid 784] set_robust_list(0x55555671f660, 24) = 0 [pid 784] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 784] setpgid(0, 0) = 0 [pid 784] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 782] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 784] <... openat resumed>) = 3 [pid 781] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 784] write(3, "1000", 4) = 4 [pid 784] close(3) = 0 [pid 784] write(1, "executing program\n", 18) = 18 [pid 782] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 784] memfd_create("syzkaller", 0 [pid 782] <... openat resumed>) = 4 [pid 782] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 781] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 784] <... memfd_create resumed>) = 3 [pid 782] ioctl(4, LOOP_CLR_FD [pid 781] <... openat resumed>) = 4 [pid 782] <... ioctl resumed>) = 0 [pid 781] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 784] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 781] ioctl(4, LOOP_CLR_FD [pid 784] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 781] <... ioctl resumed>) = 0 [pid 782] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 782] close(4) = 0 [pid 781] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 782] close(3 [pid 780] ioctl(4, LOOP_CLR_FD [pid 781] close(4 [pid 780] <... ioctl resumed>) = 0 [pid 781] <... close resumed>) = 0 [pid 781] close(3) = 0 [pid 780] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 780] close(4) = 0 [pid 780] close(3 [pid 782] <... close resumed>) = 0 [pid 782] chdir("./file0") = 0 [pid 781] chdir("./file0" [pid 782] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 781] <... chdir resumed>) = 0 [pid 782] <... open resumed>) = 3 [pid 781] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 781] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 782] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 781] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 782] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 781] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 782] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 780] <... close resumed>) = 0 [pid 780] chdir("./file0") = 0 [pid 780] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 780] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 780] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 780] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 781] <... mmap resumed>) = 0x20000000 [pid 780] <... mmap resumed>) = 0x20000000 [pid 781] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 782] <... mmap resumed>) = 0x20000000 [pid 780] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 782] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 781] <... openat resumed>) = 5 [pid 781] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 782] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 781] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 782] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 781] exit_group(0 [pid 782] exit_group(0) = ? [pid 780] <... openat resumed>) = 5 [pid 781] <... exit_group resumed>) = ? [pid 780] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 780] exit_group(0) = ? [pid 782] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=782, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 781] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=781, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 780] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=780, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 783] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 784] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 783] <... write resumed>) = 1048576 [pid 783] munmap(0x7f1ddd1fa000, 138412032 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] close(3 [pid 298] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 295] <... close resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 783] <... munmap resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 296] close(3 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 785 [pid 783] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 298] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 783] <... openat resumed>) = 4 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 787 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 786 [pid 783] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 783] ioctl(4, LOOP_CLR_FD) = 0 [pid 784] <... write resumed>) = 1048576 [pid 784] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 784] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 784] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 784] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 787 attached [pid 787] set_robust_list(0x55555671f660, 24) = 0 [pid 787] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 787] setpgid(0, 0) = 0 [pid 787] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 787] write(3, "1000", 4) = 4 [pid 787] close(3 [pid 784] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 784] close(4) = 0 [pid 784] close(3 [pid 783] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 783] close(4) = 0 [pid 783] close(3 [pid 784] <... close resumed>) = 0 [pid 787] <... close resumed>) = 0 [pid 787] write(1, "executing program\n", 18executing program ) = 18 [pid 787] memfd_create("syzkaller", 0./strace-static-x86_64: Process 785 attached [pid 785] set_robust_list(0x55555671f660, 24 [pid 787] <... memfd_create resumed>) = 3 [pid 785] <... set_robust_list resumed>) = 0 [pid 785] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 787] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 783] <... close resumed>) = 0 [pid 785] <... prctl resumed>) = 0 [pid 785] setpgid(0, 0) = 0 [pid 785] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 784] chdir("./file0") = 0 [pid 784] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 785] write(3, "1000", 4) = 4 [pid 785] close(3) = 0 executing program [pid 785] write(1, "executing program\n", 18) = 18 [pid 784] <... open resumed>) = 3 [pid 785] memfd_create("syzkaller", 0 [pid 783] chdir("./file0") = 0 [pid 785] <... memfd_create resumed>) = 3 [pid 783] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 785] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 783] <... open resumed>) = 3 ./strace-static-x86_64: Process 786 attached [pid 784] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 786] set_robust_list(0x55555671f660, 24 [pid 784] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 786] <... set_robust_list resumed>) = 0 [pid 784] <... open resumed>) = 4 [pid 786] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 783] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 786] <... prctl resumed>) = 0 [pid 783] <... mount resumed>) = 0 [pid 786] setpgid(0, 0 [pid 783] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 786] <... setpgid resumed>) = 0 [pid 783] <... open resumed>) = 4 [pid 786] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 783] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 786] <... openat resumed>) = 3 [pid 784] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 783] <... mmap resumed>) = 0x20000000 [pid 786] write(3, "1000", 4 [pid 783] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 786] <... write resumed>) = 4 executing program [pid 786] close(3 [pid 783] <... openat resumed>) = 5 [pid 786] <... close resumed>) = 0 [pid 783] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 786] write(1, "executing program\n", 18 [pid 783] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 786] <... write resumed>) = 18 [pid 783] exit_group(0 [pid 786] memfd_create("syzkaller", 0 [pid 783] <... exit_group resumed>) = ? [pid 786] <... memfd_create resumed>) = 3 [pid 783] +++ exited with 0 +++ [pid 786] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=783, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 786] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 784] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 785] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 784] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 784] exit_group(0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 786] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 788 [pid 784] <... exit_group resumed>) = ? [pid 784] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=784, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 787] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 789 [pid 787] munmap(0x7f1ddd1fa000, 138412032 [pid 786] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 788 attached [pid 786] munmap(0x7f1ddd1fa000, 138412032 [pid 788] set_robust_list(0x55555671f660, 24) = 0 [pid 788] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 786] <... munmap resumed>) = 0 [pid 788] <... prctl resumed>) = 0 [pid 786] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 788] setpgid(0, 0) = 0 [pid 786] <... openat resumed>) = 4 [pid 788] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 786] ioctl(4, LOOP_SET_FD, 3 [pid 788] <... openat resumed>) = 3 [pid 786] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 788] write(3, "1000", 4 [pid 786] ioctl(4, LOOP_CLR_FD [pid 788] <... write resumed>) = 4 executing program [pid 788] close(3 [pid 786] <... ioctl resumed>) = 0 [pid 788] <... close resumed>) = 0 [pid 788] write(1, "executing program\n", 18) = 18 [pid 788] memfd_create("syzkaller", 0) = 3 [pid 788] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 787] <... munmap resumed>) = 0 [pid 785] <... write resumed>) = 1048576 [pid 787] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 787] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 787] ioctl(4, LOOP_CLR_FD) = 0 [pid 785] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 785] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 785] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 787] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 787] close(4) = 0 [pid 787] close(3 [pid 785] ioctl(4, LOOP_CLR_FD) = 0 [pid 788] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 786] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 786] close(4) = 0 [pid 786] close(3 [pid 785] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 785] close(4) = 0 [pid 785] close(3 [pid 786] <... close resumed>) = 0 [pid 787] <... close resumed>) = 0 ./strace-static-x86_64: Process 789 attached [pid 789] set_robust_list(0x55555671f660, 24) = 0 [pid 789] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 789] setpgid(0, 0) = 0 [pid 789] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 787] chdir("./file0" [pid 785] <... close resumed>) = 0 [pid 786] chdir("./file0" [pid 789] <... openat resumed>) = 3 [pid 787] <... chdir resumed>) = 0 [pid 787] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 789] write(3, "1000", 4) = 4 [pid 789] close(3) = 0 [pid 789] write(1, "executing program\n", 18executing program ) = 18 [pid 789] memfd_create("syzkaller", 0) = 3 [pid 789] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 787] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 787] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 787] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 785] chdir("./file0") = 0 [pid 785] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 786] <... chdir resumed>) = 0 [pid 786] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 785] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 786] <... open resumed>) = 3 [pid 785] <... mount resumed>) = 0 [pid 786] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 786] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 786] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 787] <... mmap resumed>) = 0x20000000 [pid 785] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 786] <... mmap resumed>) = 0x20000000 [pid 786] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 788] <... write resumed>) = 1048576 [pid 786] <... openat resumed>) = 5 [pid 788] munmap(0x7f1ddd1fa000, 138412032 [pid 786] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 786] exit_group(0) = ? [pid 787] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 785] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 786] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=786, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 788] <... munmap resumed>) = 0 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 787] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 787] exit_group(0) = ? [pid 787] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=787, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 296] close(3 [pid 298] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 790 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 791 [pid 785] <... mmap resumed>) = 0x20000000 [pid 785] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 785] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 785] exit_group(0 [pid 788] openat(AT_FDCWD, "/dev/loop2", O_RDWR./strace-static-x86_64: Process 791 attached ./strace-static-x86_64: Process 790 attached ) = 4 [pid 790] set_robust_list(0x55555671f660, 24 [pid 788] ioctl(4, LOOP_SET_FD, 3 [pid 791] set_robust_list(0x55555671f660, 24 [pid 790] <... set_robust_list resumed>) = 0 [pid 791] <... set_robust_list resumed>) = 0 [pid 788] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 788] ioctl(4, LOOP_CLR_FD [pid 785] <... exit_group resumed>) = ? executing program executing program [pid 791] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 790] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 789] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 788] <... ioctl resumed>) = 0 [pid 791] <... prctl resumed>) = 0 [pid 790] <... prctl resumed>) = 0 [pid 791] setpgid(0, 0 [pid 790] setpgid(0, 0 [pid 791] <... setpgid resumed>) = 0 [pid 790] <... setpgid resumed>) = 0 [pid 791] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 790] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 791] <... openat resumed>) = 3 [pid 790] <... openat resumed>) = 3 [pid 785] +++ exited with 0 +++ [pid 791] write(3, "1000", 4 [pid 790] write(3, "1000", 4 [pid 788] ioctl(4, LOOP_SET_FD, 3 [pid 791] <... write resumed>) = 4 [pid 790] <... write resumed>) = 4 [pid 791] close(3 [pid 790] close(3 [pid 788] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 791] <... close resumed>) = 0 [pid 790] <... close resumed>) = 0 [pid 788] close(4 [pid 791] write(1, "executing program\n", 18 [pid 790] write(1, "executing program\n", 18 [pid 791] <... write resumed>) = 18 [pid 788] <... close resumed>) = 0 [pid 790] <... write resumed>) = 18 [pid 791] memfd_create("syzkaller", 0 [pid 788] close(3 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=785, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 790] memfd_create("syzkaller", 0 [pid 791] <... memfd_create resumed>) = 3 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 788] <... close resumed>) = 0 [pid 790] <... memfd_create resumed>) = 3 [pid 791] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 788] chdir("./file0" [pid 790] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 791] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 790] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 789] <... write resumed>) = 1048576 [pid 789] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 789] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 789] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 789] ioctl(4, LOOP_CLR_FD) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 791] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 792 [pid 789] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 789] close(4) = 0 [pid 789] close(3) = 0 [pid 790] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 788] <... chdir resumed>) = 0 [pid 788] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 789] chdir("./file0") = 0 [pid 789] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 788] <... open resumed>) = 3 [pid 788] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 788] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 788] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 788] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 788] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 788] exit_group(0) = ? [pid 789] <... open resumed>) = 3 [pid 789] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 788] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=788, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 789] <... mount resumed>) = 0 [pid 789] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 ./strace-static-x86_64: Process 792 attached [pid 792] set_robust_list(0x55555671f660, 24 [pid 789] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 792] <... set_robust_list resumed>) = 0 [pid 792] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 792] setpgid(0, 0 [pid 790] <... write resumed>) = 1048576 [pid 792] <... setpgid resumed>) = 0 [pid 792] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 792] write(3, "1000", 4) = 4 [pid 792] close(3) = 0 [pid 792] write(1, "executing program\n", 18executing program [pid 791] <... write resumed>) = 1048576 [pid 790] munmap(0x7f1ddd1fa000, 138412032 [pid 789] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 792] <... write resumed>) = 18 [pid 790] <... munmap resumed>) = 0 [pid 791] munmap(0x7f1ddd1fa000, 138412032 [pid 792] memfd_create("syzkaller", 0 [pid 789] <... openat resumed>) = 5 [pid 792] <... memfd_create resumed>) = 3 [pid 791] <... munmap resumed>) = 0 [pid 790] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 789] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 791] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 792] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 793 ./strace-static-x86_64: Process 793 attached [pid 793] set_robust_list(0x55555671f660, 24) = 0 [pid 793] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 793] setpgid(0, 0) = 0 [pid 793] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 793] write(3, "1000", 4) = 4 [pid 793] close(3) = 0 [pid 793] write(1, "executing program\n", 18executing program ) = 18 [pid 793] memfd_create("syzkaller", 0) = 3 [pid 793] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 790] <... openat resumed>) = 4 [pid 789] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 791] <... openat resumed>) = 4 [pid 790] ioctl(4, LOOP_SET_FD, 3 [pid 791] ioctl(4, LOOP_SET_FD, 3 [pid 789] exit_group(0 [pid 790] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 791] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 789] <... exit_group resumed>) = ? [pid 791] ioctl(4, LOOP_CLR_FD [pid 790] ioctl(4, LOOP_CLR_FD [pid 789] +++ exited with 0 +++ [pid 791] <... ioctl resumed>) = 0 [pid 790] <... ioctl resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=789, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 791] ioctl(4, LOOP_SET_FD, 3 [pid 790] ioctl(4, LOOP_SET_FD, 3 [pid 791] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 790] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 791] close(4 [pid 790] close(4 [pid 791] <... close resumed>) = 0 [pid 790] <... close resumed>) = 0 [pid 791] close(3 [pid 790] close(3 [pid 792] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 790] <... close resumed>) = 0 [pid 791] <... close resumed>) = 0 [pid 790] chdir("./file0" [pid 791] chdir("./file0" [pid 790] <... chdir resumed>) = 0 [pid 791] <... chdir resumed>) = 0 [pid 790] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 791] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 790] <... open resumed>) = 3 [pid 791] <... open resumed>) = 3 [pid 790] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 791] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 790] <... mount resumed>) = 0 [pid 791] <... mount resumed>) = 0 [pid 790] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 791] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 790] <... open resumed>) = 4 [pid 791] <... open resumed>) = 4 [pid 299] <... restart_syscall resumed>) = 0 [pid 791] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 790] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 791] <... mmap resumed>) = 0x20000000 [pid 299] <... ioctl resumed>) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 791] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 790] <... mmap resumed>) = 0x20000000 [pid 791] <... openat resumed>) = 5 [pid 790] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 794 [pid 791] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 790] <... openat resumed>) = 5 [pid 791] exit_group(0 [pid 790] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 791] <... exit_group resumed>) = ? [pid 790] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 791] +++ exited with 0 +++ [pid 790] exit_group(0) = ? [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=791, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 790] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=790, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 793] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 792] <... write resumed>) = 1048576 [pid 792] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 296] close(3 [pid 298] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 795 attached ./strace-static-x86_64: Process 794 attached [pid 795] set_robust_list(0x55555671f660, 24 [pid 794] set_robust_list(0x55555671f660, 24 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 795 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 796 [pid 795] <... set_robust_list resumed>) = 0 [pid 794] <... set_robust_list resumed>) = 0 [pid 795] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 794] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 795] <... prctl resumed>) = 0 [pid 794] <... prctl resumed>) = 0 [pid 795] setpgid(0, 0 [pid 794] setpgid(0, 0 [pid 795] <... setpgid resumed>) = 0 [pid 794] <... setpgid resumed>) = 0 [pid 795] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 794] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 795] <... openat resumed>) = 3 [pid 792] openat(AT_FDCWD, "/dev/loop0", O_RDWRexecuting program [pid 795] write(3, "1000", 4 [pid 794] <... openat resumed>) = 3 [pid 795] <... write resumed>) = 4 [pid 794] write(3, "1000", 4 [pid 795] close(3 [pid 794] <... write resumed>) = 4 [pid 795] <... close resumed>) = 0 [pid 794] close(3 [pid 795] write(1, "executing program\n", 18 [pid 794] <... close resumed>) = 0 [pid 795] <... write resumed>) = 18 [pid 794] write(1, "executing program\n", 18executing program [pid 795] memfd_create("syzkaller", 0 [pid 794] <... write resumed>) = 18 [pid 795] <... memfd_create resumed>) = 3 [pid 794] memfd_create("syzkaller", 0 [pid 795] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 794] <... memfd_create resumed>) = 3 [pid 792] <... openat resumed>) = 4 [pid 792] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 792] ioctl(4, LOOP_CLR_FD) = 0 [pid 792] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 792] close(4) = 0 [pid 792] close(3) = 0 [pid 792] chdir("./file0") = 0 [pid 792] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 792] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 795] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 794] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 792] <... mount resumed>) = 0 [pid 792] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 792] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 793] <... write resumed>) = 1048576 [pid 793] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 792] <... mmap resumed>) = 0x20000000 [pid 793] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 793] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 793] ioctl(4, LOOP_CLR_FD) = 0 [pid 792] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 792] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 792] exit_group(0) = ? [pid 793] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 793] close(4) = 0 [pid 793] close(3 [pid 794] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 792] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=792, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 793] <... close resumed>) = 0 [pid 793] chdir("./file0") = 0 [pid 793] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 793] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 797 [pid 793] <... mount resumed>) = 0 ./strace-static-x86_64: Process 796 attached [pid 793] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 796] set_robust_list(0x55555671f660, 24) = 0 [pid 796] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 793] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 796] <... prctl resumed>) = 0 [pid 796] setpgid(0, 0 [pid 793] <... mmap resumed>) = 0x20000000 [pid 796] <... setpgid resumed>) = 0 [pid 796] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 794] <... write resumed>) = 1048576 [pid 796] <... openat resumed>) = 3 [pid 796] write(3, "1000", 4) = 4 [pid 796] close(3) = 0 [pid 796] write(1, "executing program\n", 18executing program ) = 18 [pid 796] memfd_create("syzkaller", 0) = 3 [pid 796] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 795] <... write resumed>) = 1048576 [pid 793] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 793] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 795] munmap(0x7f1ddd1fa000, 138412032 [pid 794] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 795] <... munmap resumed>) = 0 [pid 794] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 795] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 794] <... openat resumed>) = 4 [pid 794] ioctl(4, LOOP_SET_FD, 3 [pid 795] <... openat resumed>) = 4 [pid 794] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 795] ioctl(4, LOOP_SET_FD, 3 [pid 794] ioctl(4, LOOP_CLR_FD) = 0 [pid 795] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 795] ioctl(4, LOOP_CLR_FD [pid 793] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 793] exit_group(0) = ? [pid 795] <... ioctl resumed>) = 0 [pid 794] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 794] close(4) = 0 [pid 794] close(3 [pid 793] +++ exited with 0 +++ [pid 795] ioctl(4, LOOP_SET_FD, 3 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=793, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 795] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 795] close(4./strace-static-x86_64: Process 797 attached [pid 797] set_robust_list(0x55555671f660, 24) = 0 [pid 797] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 797] setpgid(0, 0) = 0 [pid 797] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 794] <... close resumed>) = 0 [pid 795] <... close resumed>) = 0 [pid 795] close(3 [pid 794] chdir("./file0" [pid 795] <... close resumed>) = 0 [pid 794] <... chdir resumed>) = 0 [pid 797] <... openat resumed>) = 3 [pid 797] write(3, "1000", 4) = 4 [pid 797] close(3) = 0 [pid 797] write(1, "executing program\n", 18executing program [pid 794] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 795] chdir("./file0" [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 795] <... chdir resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 797] <... write resumed>) = 18 [pid 795] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 799 [pid 797] memfd_create("syzkaller", 0 [pid 794] <... open resumed>) = 3 [pid 797] <... memfd_create resumed>) = 3 [pid 797] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 795] <... open resumed>) = 3 [pid 794] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 795] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 797] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 796] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 799 attached [pid 799] set_robust_list(0x55555671f660, 24) = 0 [pid 799] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 799] setpgid(0, 0) = 0 [pid 799] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 799] write(3, "1000", 4) = 4 [pid 799] close(3) = 0 [pid 799] write(1, "executing program\n", 18executing program ) = 18 [pid 794] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 795] <... mount resumed>) = 0 [pid 799] memfd_create("syzkaller", 0 [pid 794] <... open resumed>) = 4 [pid 795] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 794] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 795] <... open resumed>) = 4 [pid 799] <... memfd_create resumed>) = 3 [pid 799] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 794] <... mmap resumed>) = 0x20000000 [pid 795] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 794] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 795] <... mmap resumed>) = 0x20000000 [pid 794] <... openat resumed>) = 5 [pid 795] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 794] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 795] <... openat resumed>) = 5 [pid 794] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 795] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 794] exit_group(0 [pid 795] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 794] <... exit_group resumed>) = ? [pid 795] exit_group(0 [pid 794] +++ exited with 0 +++ [pid 795] <... exit_group resumed>) = ? [pid 795] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=794, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=795, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] <... ioctl resumed>) = 0 [pid 299] <... openat resumed>) = 3 [pid 298] close(3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] <... close resumed>) = 0 [pid 299] <... ioctl resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] close(3) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 800 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 801 [pid 797] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 796] <... write resumed>) = 1048576 [pid 796] munmap(0x7f1ddd1fa000, 138412032 [pid 799] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 796] <... munmap resumed>) = 0 [pid 796] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 796] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 796] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 801 attached [pid 801] set_robust_list(0x55555671f660, 24) = 0 [pid 801] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 801] setpgid(0, 0 [pid 796] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 796] close(4) = 0 [pid 796] close(3./strace-static-x86_64: Process 800 attached [pid 800] set_robust_list(0x55555671f660, 24) = 0 [pid 800] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 800] setpgid(0, 0 [pid 801] <... setpgid resumed>) = 0 [pid 800] <... setpgid resumed>) = 0 [pid 800] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 801] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 801] write(3, "1000", 4) = 4 [pid 801] close(3) = 0 [pid 801] write(1, "executing program\n", 18executing program ) = 18 [pid 801] memfd_create("syzkaller", 0 [pid 796] <... close resumed>) = 0 [pid 801] <... memfd_create resumed>) = 3 [pid 801] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 797] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 800] write(3, "1000", 4 [pid 796] chdir("./file0" [pid 797] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 796] <... chdir resumed>) = 0 [pid 797] <... openat resumed>) = 4 [pid 796] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 800] <... write resumed>) = 4 [pid 801] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 799] <... write resumed>) = 1048576 [pid 800] close(3 [pid 797] ioctl(4, LOOP_SET_FD, 3 [pid 796] <... open resumed>) = 3 [pid 800] <... close resumed>) = 0 [pid 799] munmap(0x7f1ddd1fa000, 138412032 [pid 800] write(1, "executing program\n", 18executing program [pid 799] <... munmap resumed>) = 0 [pid 800] <... write resumed>) = 18 [pid 799] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 800] memfd_create("syzkaller", 0 [pid 799] <... openat resumed>) = 4 [pid 800] <... memfd_create resumed>) = 3 [pid 799] ioctl(4, LOOP_SET_FD, 3 [pid 800] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 799] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 800] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 799] ioctl(4, LOOP_CLR_FD [pid 797] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 797] ioctl(4, LOOP_CLR_FD) = 0 [pid 796] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 796] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 796] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 797] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 797] close(4) = 0 [pid 797] close(3) = 0 [pid 796] <... mmap resumed>) = 0x20000000 [pid 796] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 800] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 799] <... ioctl resumed>) = 0 [pid 796] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 796] exit_group(0) = ? [pid 796] +++ exited with 0 +++ [pid 799] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=796, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 799] close(4 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 799] <... close resumed>) = 0 [pid 799] close(3 [pid 797] chdir("./file0") = 0 [pid 797] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 797] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 797] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 797] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 799] <... close resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 799] chdir("./file0") = 0 [pid 799] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 799] <... open resumed>) = 3 [pid 296] close(3) = 0 [pid 799] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 797] <... mmap resumed>) = 0x20000000 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 802 [pid 799] <... mount resumed>) = 0 [pid 799] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 797] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 799] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 797] <... openat resumed>) = 5 [pid 797] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 797] exit_group(0 [pid 799] <... mmap resumed>) = 0x20000000 [pid 799] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 799] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 797] <... exit_group resumed>) = ? [pid 799] exit_group(0 [pid 797] +++ exited with 0 +++ [pid 799] <... exit_group resumed>) = ? [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=797, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 799] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=799, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 800] <... write resumed>) = 1048576 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 803 ./strace-static-x86_64: Process 802 attached [pid 802] set_robust_list(0x55555671f660, 24) = 0 [pid 802] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 800] munmap(0x7f1ddd1fa000, 138412032 [pid 297] <... restart_syscall resumed>) = 0 [pid 802] <... prctl resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 800] <... munmap resumed>) = 0 [pid 800] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 800] <... openat resumed>) = 4 [pid 297] ioctl(3, LOOP_CLR_FD [pid 800] ioctl(4, LOOP_SET_FD, 3 [pid 297] <... ioctl resumed>) = 0 [pid 800] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 297] close(3) = 0 [pid 800] ioctl(4, LOOP_CLR_FD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 800] <... ioctl resumed>) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 804 [pid 802] setpgid(0, 0) = 0 [pid 802] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 802] write(3, "1000", 4) = 4 ./strace-static-x86_64: Process 803 attached [pid 800] ioctl(4, LOOP_SET_FD, 3 [pid 803] set_robust_list(0x55555671f660, 24 [pid 800] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 803] <... set_robust_list resumed>) = 0 [pid 800] close(4) = 0 [pid 803] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 800] close(3executing program [pid 802] close(3) = 0 [pid 802] write(1, "executing program\n", 18) = 18 [pid 802] memfd_create("syzkaller", 0 [pid 801] <... write resumed>) = 1048576 [pid 802] <... memfd_create resumed>) = 3 [pid 802] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 800] <... close resumed>) = 0 [pid 803] <... prctl resumed>) = 0 [pid 801] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 801] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 801] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 801] ioctl(4, LOOP_CLR_FD) = 0 [pid 801] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 801] close(4) = 0 [pid 801] close(3./strace-static-x86_64: Process 804 attached [pid 804] set_robust_list(0x55555671f660, 24 [pid 803] setpgid(0, 0 [pid 800] chdir("./file0" [pid 803] <... setpgid resumed>) = 0 [pid 804] <... set_robust_list resumed>) = 0 [pid 804] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 803] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 800] <... chdir resumed>) = 0 [pid 803] <... openat resumed>) = 3 [pid 800] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 804] <... prctl resumed>) = 0 [pid 804] setpgid(0, 0) = 0 [pid 804] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 803] write(3, "1000", 4 [pid 804] <... openat resumed>) = 3 [pid 800] <... open resumed>) = 3 [pid 803] <... write resumed>) = 4 executing program executing program [pid 803] close(3 [pid 800] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 803] <... close resumed>) = 0 [pid 804] write(3, "1000", 4 [pid 803] write(1, "executing program\n", 18 [pid 804] <... write resumed>) = 4 [pid 804] close(3) = 0 [pid 804] write(1, "executing program\n", 18 [pid 800] <... mount resumed>) = 0 [pid 803] <... write resumed>) = 18 [pid 804] <... write resumed>) = 18 [pid 804] memfd_create("syzkaller", 0 [pid 803] memfd_create("syzkaller", 0 [pid 800] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 803] <... memfd_create resumed>) = 3 [pid 800] <... open resumed>) = 4 [pid 803] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 804] <... memfd_create resumed>) = 3 [pid 803] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 800] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 804] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 801] <... close resumed>) = 0 [pid 801] chdir("./file0") = 0 [pid 801] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 800] <... mmap resumed>) = 0x20000000 [pid 800] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 801] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 801] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 801] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 800] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 800] exit_group(0) = ? [pid 800] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=800, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 801] <... mmap resumed>) = 0x20000000 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 801] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 801] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 801] exit_group(0) = ? [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 803] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 802] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 801] +++ exited with 0 +++ [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 805 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=801, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 804] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 803] <... write resumed>) = 1048576 [pid 299] <... restart_syscall resumed>) = 0 [pid 803] munmap(0x7f1ddd1fa000, 138412032./strace-static-x86_64: Process 805 attached [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 803] <... munmap resumed>) = 0 [pid 299] ioctl(3, LOOP_CLR_FD [pid 805] set_robust_list(0x55555671f660, 24 [pid 804] <... write resumed>) = 1048576 [pid 805] <... set_robust_list resumed>) = 0 [pid 803] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 802] <... write resumed>) = 1048576 [pid 299] <... ioctl resumed>) = 0 [pid 805] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 803] <... openat resumed>) = 4 [pid 299] close(3 [pid 805] setpgid(0, 0 [pid 299] <... close resumed>) = 0 [pid 805] <... setpgid resumed>) = 0 [pid 803] ioctl(4, LOOP_SET_FD, 3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 805] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 803] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 802] munmap(0x7f1ddd1fa000, 138412032 [pid 803] ioctl(4, LOOP_CLR_FD [pid 805] <... openat resumed>) = 3 [pid 803] <... ioctl resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 806 [pid 805] write(3, "1000", 4) = 4 executing program [pid 805] close(3) = 0 [pid 805] write(1, "executing program\n", 18) = 18 [pid 805] memfd_create("syzkaller", 0) = 3 [pid 805] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 803] ioctl(4, LOOP_SET_FD, 3 [pid 805] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 803] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 802] <... munmap resumed>) = 0 [pid 802] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 802] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 802] ioctl(4, LOOP_CLR_FD) = 0 [pid 804] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 804] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 804] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 802] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 802] close(4) = 0 [pid 802] close(3) = 0 [pid 804] ioctl(4, LOOP_CLR_FD) = 0 [pid 802] chdir("./file0") = 0 [pid 803] close(4 [pid 802] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 805] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 803] <... close resumed>) = 0 [pid 803] close(3 [pid 804] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 804] close(4) = 0 [pid 804] close(3 [pid 803] <... close resumed>) = 0 [pid 803] chdir("./file0") = 0 [pid 803] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 802] <... open resumed>) = 3 [pid 803] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 802] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 803] <... mount resumed>) = 0 [pid 803] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 803] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 802] <... mount resumed>) = 0 [pid 802] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 802] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 803] <... mmap resumed>) = 0x20000000 [pid 803] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 802] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 806 attached [pid 806] set_robust_list(0x55555671f660, 24) = 0 [pid 806] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 804] <... close resumed>) = 0 [pid 806] <... prctl resumed>) = 0 [pid 806] setpgid(0, 0) = 0 [pid 806] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 803] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 802] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 806] write(3, "1000", 4) = 4 [pid 806] close(3 [pid 802] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 806] <... close resumed>) = 0 [pid 802] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 802] exit_group(0executing program [pid 806] write(1, "executing program\n", 18) = 18 [pid 806] memfd_create("syzkaller", 0 [pid 802] <... exit_group resumed>) = ? [pid 805] <... write resumed>) = 1048576 [pid 803] exit_group(0) = ? [pid 806] <... memfd_create resumed>) = 3 [pid 806] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 803] +++ exited with 0 +++ [pid 805] munmap(0x7f1ddd1fa000, 138412032 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=803, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 805] <... munmap resumed>) = 0 [pid 804] chdir("./file0" [pid 806] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 805] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 802] +++ exited with 0 +++ [pid 295] <... restart_syscall resumed>) = 0 [pid 805] <... openat resumed>) = 4 [pid 805] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 805] ioctl(4, LOOP_CLR_FD) = 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=802, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 804] <... chdir resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 804] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] <... openat resumed>) = 3 [pid 804] <... open resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 805] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] <... ioctl resumed>) = 0 [pid 805] close(4) = 0 [pid 804] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 296] <... ioctl resumed>) = 0 [pid 295] close(3 [pid 805] close(3 [pid 804] <... mount resumed>) = 0 [pid 296] close(3 [pid 295] <... close resumed>) = 0 [pid 804] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 296] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 804] <... open resumed>) = 4 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 804] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 807 [pid 805] <... close resumed>) = 0 [pid 804] <... mmap resumed>) = 0x20000000 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 808 [pid 805] chdir("./file0") = 0 [pid 805] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 804] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 805] <... open resumed>) = 3 [pid 804] <... openat resumed>) = 5 [pid 805] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 804] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 805] <... mount resumed>) = 0 [pid 805] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 805] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 804] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 804] exit_group(0) = ? [pid 805] <... mmap resumed>) = 0x20000000 [pid 804] +++ exited with 0 +++ [pid 805] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=804, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 805] <... openat resumed>) = 5 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 805] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 805] exit_group(0) = ? [pid 297] <... restart_syscall resumed>) = 0 [pid 805] +++ exited with 0 +++ [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=805, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] <... openat resumed>) = 3 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 297] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 807 attached ) = 0 [pid 297] close(3 [pid 807] set_robust_list(0x55555671f660, 24 [pid 297] <... close resumed>) = 0 [pid 807] <... set_robust_list resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 809 [pid 807] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 807] setpgid(0, 0) = 0 ./strace-static-x86_64: Process 808 attached [pid 807] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 807] write(3, "1000", 4) = 4 executing program [pid 807] close(3) = 0 ./strace-static-x86_64: Process 809 attached [pid 807] write(1, "executing program\n", 18) = 18 [pid 809] set_robust_list(0x55555671f660, 24) = 0 [pid 807] memfd_create("syzkaller", 0 [pid 809] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 807] <... memfd_create resumed>) = 3 [pid 809] <... prctl resumed>) = 0 [pid 807] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 809] setpgid(0, 0) = 0 [pid 807] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 809] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 808] set_robust_list(0x55555671f660, 24) = 0 [pid 808] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 808] setpgid(0, 0) = 0 [pid 808] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 808] write(3, "1000", 4) = 4 [pid 808] close(3) = 0 [pid 808] write(1, "executing program\n", 18executing program ) = 18 [pid 808] memfd_create("syzkaller", 0) = 3 [pid 808] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 809] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 809] write(3, "1000", 4 [pid 298] ioctl(3, LOOP_CLR_FD [pid 809] <... write resumed>) = 4 [pid 298] <... ioctl resumed>) = 0 [pid 809] close(3 [pid 298] close(3) = 0 [pid 809] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program [pid 809] write(1, "executing program\n", 18) = 18 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 810 [pid 809] memfd_create("syzkaller", 0) = 3 [pid 807] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 809] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 806] <... write resumed>) = 1048576 [pid 806] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 806] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 806] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 806] ioctl(4, LOOP_CLR_FD) = 0 [pid 806] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 806] close(4) = 0 [pid 806] close(3) = 0 [pid 806] chdir("./file0") = 0 [pid 806] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 808] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 806] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 806] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 806] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 806] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 806] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 806] exit_group(0) = ? [pid 806] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=806, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 809] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 808] <... write resumed>) = 1048576 [pid 808] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 808] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 808] ioctl(4, LOOP_SET_FD, 3 [pid 809] <... write resumed>) = 1048576 [pid 808] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) ./strace-static-x86_64: Process 810 attached [pid 808] ioctl(4, LOOP_CLR_FD) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 810] set_robust_list(0x55555671f660, 24 [pid 809] munmap(0x7f1ddd1fa000, 138412032 [pid 807] <... write resumed>) = 1048576 [pid 299] ioctl(3, LOOP_CLR_FD [pid 810] <... set_robust_list resumed>) = 0 [pid 807] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... ioctl resumed>) = 0 [pid 810] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 810] <... prctl resumed>) = 0 [pid 809] <... munmap resumed>) = 0 [pid 807] <... munmap resumed>) = 0 [pid 810] setpgid(0, 0 [pid 809] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 807] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 810] <... setpgid resumed>) = 0 [pid 807] <... openat resumed>) = 4 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 811 [pid 810] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 809] <... openat resumed>) = 4 [pid 807] ioctl(4, LOOP_SET_FD, 3 [pid 810] <... openat resumed>) = 3 [pid 809] ioctl(4, LOOP_SET_FD, 3 [pid 807] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 810] write(3, "1000", 4 [pid 807] ioctl(4, LOOP_CLR_FD [pid 810] <... write resumed>) = 4 [pid 809] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 807] <... ioctl resumed>) = 0 [pid 810] close(3 [pid 809] ioctl(4, LOOP_CLR_FD [pid 810] <... close resumed>) = 0 executing program [pid 810] write(1, "executing program\n", 18 [pid 809] <... ioctl resumed>) = 0 [pid 810] <... write resumed>) = 18 [pid 810] memfd_create("syzkaller", 0 [pid 808] ioctl(4, LOOP_SET_FD, 3 [pid 810] <... memfd_create resumed>) = 3 [pid 808] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 810] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 808] close(4) = 0 [pid 808] close(3 [pid 807] ioctl(4, LOOP_SET_FD, 3 [pid 808] <... close resumed>) = 0 [pid 807] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 807] close(4 [pid 809] ioctl(4, LOOP_SET_FD, 3 [pid 807] <... close resumed>) = 0 [pid 807] close(3 [pid 809] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 808] chdir("./file0") = 0 [pid 808] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 808] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 808] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 808] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 809] close(4 [pid 808] <... mmap resumed>) = 0x20000000 [pid 807] <... close resumed>) = 0 [pid 808] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 808] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 808] exit_group(0) = ? [pid 809] <... close resumed>) = 0 [pid 807] chdir("./file0" [pid 808] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=808, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 811 attached [pid 811] set_robust_list(0x55555671f660, 24) = 0 [pid 811] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 811] setpgid(0, 0) = 0 [pid 811] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 809] close(3 [pid 807] <... chdir resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 812 [pid 811] write(3, "1000", 4) = 4 [pid 811] close(3 [pid 807] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 811] <... close resumed>) = 0 executing program [pid 811] write(1, "executing program\n", 18) = 18 [pid 807] <... open resumed>) = 3 [pid 811] memfd_create("syzkaller", 0) = 3 [pid 809] <... close resumed>) = 0 [pid 807] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 811] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 810] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 807] <... mount resumed>) = 0 [pid 809] chdir("./file0") = 0 [pid 807] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 809] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 807] <... open resumed>) = 4 [pid 809] <... open resumed>) = 3 [pid 807] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 809] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 807] <... mmap resumed>) = 0x20000000 [pid 809] <... mount resumed>) = 0 [pid 809] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 807] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 809] <... open resumed>) = 4 [pid 809] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 807] <... openat resumed>) = 5 [pid 807] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 807] exit_group(0) = ? [pid 809] <... mmap resumed>) = 0x20000000 [pid 807] +++ exited with 0 +++ [pid 809] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=807, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 812 attached [pid 812] set_robust_list(0x55555671f660, 24) = 0 [pid 812] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 810] <... write resumed>) = 1048576 [pid 809] <... openat resumed>) = 5 [pid 809] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 809] exit_group(0) = ? [pid 812] <... prctl resumed>) = 0 [pid 812] setpgid(0, 0) = 0 [pid 812] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 809] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=809, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 812] write(3, "1000", 4) = 4 [pid 812] close(3) = 0 [pid 812] write(1, "executing program\n", 18executing program ) = 18 [pid 812] memfd_create("syzkaller", 0 [pid 810] munmap(0x7f1ddd1fa000, 138412032 [pid 297] <... restart_syscall resumed>) = 0 [pid 812] <... memfd_create resumed>) = 3 [pid 810] <... munmap resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 810] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 810] <... openat resumed>) = 4 [pid 297] ioctl(3, LOOP_CLR_FD [pid 810] ioctl(4, LOOP_SET_FD, 3 [pid 297] <... ioctl resumed>) = 0 [pid 810] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 297] close(3) = 0 [pid 810] ioctl(4, LOOP_CLR_FD) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 813 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 814 [pid 812] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 810] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 810] close(4) = 0 [pid 810] close(3) = 0 [pid 811] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 814 attached [pid 814] set_robust_list(0x55555671f660, 24) = 0 [pid 814] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 814] setpgid(0, 0) = 0 [pid 810] chdir("./file0"./strace-static-x86_64: Process 813 attached ) = 0 [pid 813] set_robust_list(0x55555671f660, 24) = 0 [pid 810] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 813] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 814] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 813] <... prctl resumed>) = 0 [pid 810] <... open resumed>) = 3 [pid 813] setpgid(0, 0 [pid 810] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 813] <... setpgid resumed>) = 0 [pid 810] <... mount resumed>) = 0 [pid 813] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 810] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 814] <... openat resumed>) = 3 [pid 813] <... openat resumed>) = 3 [pid 813] write(3, "1000", 4 [pid 810] <... open resumed>) = 4 [pid 813] <... write resumed>) = 4 [pid 813] close(3 [pid 810] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 813] <... close resumed>) = 0 [pid 814] write(3, "1000", 4) = 4 [pid 814] close(3) = 0 [pid 814] write(1, "executing program\n", 18executing program executing program [pid 810] <... mmap resumed>) = 0x20000000 [pid 813] write(1, "executing program\n", 18 [pid 810] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 813] <... write resumed>) = 18 [pid 810] <... openat resumed>) = 5 [pid 813] memfd_create("syzkaller", 0 [pid 810] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 813] <... memfd_create resumed>) = 3 [pid 810] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 813] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 810] exit_group(0 [pid 814] <... write resumed>) = 18 [pid 814] memfd_create("syzkaller", 0) = 3 [pid 814] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 812] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 810] <... exit_group resumed>) = ? [pid 810] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=810, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 815 [pid 811] <... write resumed>) = 1048576 [pid 811] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 811] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 811] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 811] ioctl(4, LOOP_CLR_FD) = 0 [pid 813] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 815 attached [pid 814] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 815] set_robust_list(0x55555671f660, 24 [pid 811] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 811] close(4) = 0 [pid 811] close(3 [pid 813] <... write resumed>) = 1048576 [pid 815] <... set_robust_list resumed>) = 0 [pid 813] munmap(0x7f1ddd1fa000, 138412032 [pid 815] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 815] setpgid(0, 0) = 0 [pid 815] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 815] write(3, "1000", 4executing program ) = 4 [pid 815] close(3 [pid 813] <... munmap resumed>) = 0 [pid 815] <... close resumed>) = 0 [pid 813] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 815] write(1, "executing program\n", 18) = 18 [pid 813] <... openat resumed>) = 4 [pid 815] memfd_create("syzkaller", 0 [pid 813] ioctl(4, LOOP_SET_FD, 3 [pid 815] <... memfd_create resumed>) = 3 [pid 813] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 815] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 813] ioctl(4, LOOP_CLR_FD [pid 815] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 813] <... ioctl resumed>) = 0 [pid 811] <... close resumed>) = 0 [pid 811] chdir("./file0") = 0 [pid 811] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 811] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 812] <... write resumed>) = 1048576 [pid 811] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 813] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 813] close(4) = 0 [pid 813] close(3 [pid 811] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 812] munmap(0x7f1ddd1fa000, 138412032 [pid 815] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 814] <... write resumed>) = 1048576 [pid 813] <... close resumed>) = 0 [pid 811] <... mmap resumed>) = 0x20000000 [pid 813] chdir("./file0") = 0 [pid 813] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 813] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 812] <... munmap resumed>) = 0 [pid 813] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 812] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 813] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 812] <... openat resumed>) = 4 [pid 812] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 812] ioctl(4, LOOP_CLR_FD) = 0 [pid 813] <... mmap resumed>) = 0x20000000 [pid 811] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 813] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 811] <... openat resumed>) = 5 [pid 813] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 813] exit_group(0) = ? [pid 812] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 812] close(4) = 0 [pid 812] close(3 [pid 813] +++ exited with 0 +++ [pid 814] munmap(0x7f1ddd1fa000, 138412032 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=813, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 811] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 814] <... munmap resumed>) = 0 [pid 811] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 811] exit_group(0) = ? [pid 811] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=811, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 812] <... close resumed>) = 0 [pid 812] chdir("./file0") = 0 [pid 812] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 814] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 299] <... restart_syscall resumed>) = 0 [pid 814] ioctl(4, LOOP_SET_FD, 3 [pid 297] <... restart_syscall resumed>) = 0 [pid 814] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 814] ioctl(4, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 814] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... openat resumed>) = 3 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 816 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 817 [pid 814] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 814] close(4) = 0 [pid 814] close(3 [pid 812] <... open resumed>) = 3 [pid 812] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 812] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 812] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 812] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 814] <... close resumed>) = 0 [pid 812] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 814] chdir("./file0" [pid 812] exit_group(0) = ? [pid 815] <... write resumed>) = 1048576 [pid 814] <... chdir resumed>) = 0 [pid 812] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=812, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 816 attached [pid 816] set_robust_list(0x55555671f660, 24) = 0 [pid 816] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 816] setpgid(0, 0) = 0 [pid 816] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 815] munmap(0x7f1ddd1fa000, 138412032 [pid 814] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 817 attached [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 814] <... open resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 815] <... munmap resumed>) = 0 [pid 814] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 817] set_robust_list(0x55555671f660, 24 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 818 [pid 816] <... openat resumed>) = 3 [pid 816] write(3, "1000", 4) = 4 [pid 816] close(3) = 0 [pid 815] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 814] <... mount resumed>) = 0 [pid 817] <... set_robust_list resumed>) = 0 [pid 815] <... openat resumed>) = 4 [pid 814] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 817] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 815] ioctl(4, LOOP_SET_FD, 3 [pid 814] <... open resumed>) = 4 executing program [pid 815] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 814] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 817] setpgid(0, 0 [pid 815] ioctl(4, LOOP_CLR_FD [pid 816] write(1, "executing program\n", 18) = 18 [pid 816] memfd_create("syzkaller", 0) = 3 [pid 816] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 817] <... setpgid resumed>) = 0 [pid 815] <... ioctl resumed>) = 0 [pid 814] <... mmap resumed>) = 0x20000000 ./strace-static-x86_64: Process 818 attached [pid 817] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 814] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 818] set_robust_list(0x55555671f660, 24 [pid 817] <... openat resumed>) = 3 [pid 817] write(3, "1000", 4 [pid 814] <... openat resumed>) = 5 [pid 817] <... write resumed>) = 4 [pid 814] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 817] close(3) = 0 [pid 814] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 817] write(1, "executing program\n", 18executing program ) = 18 [pid 814] exit_group(0 [pid 818] <... set_robust_list resumed>) = 0 [pid 817] memfd_create("syzkaller", 0 [pid 814] <... exit_group resumed>) = ? [pid 817] <... memfd_create resumed>) = 3 [pid 818] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 814] +++ exited with 0 +++ [pid 817] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=814, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 817] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 815] ioctl(4, LOOP_SET_FD, 3 [pid 818] <... prctl resumed>) = 0 [pid 818] setpgid(0, 0) = 0 [pid 818] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 818] write(3, "1000", 4 [pid 815] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 815] close(4) = 0 [pid 815] close(3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 819 executing program [pid 818] <... write resumed>) = 4 [pid 818] close(3) = 0 [pid 818] write(1, "executing program\n", 18) = 18 [pid 818] memfd_create("syzkaller", 0) = 3 [pid 818] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 815] <... close resumed>) = 0 [pid 815] chdir("./file0") = 0 [pid 815] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 815] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 815] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 815] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 815] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 815] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 815] exit_group(0) = ? [pid 815] +++ exited with 0 +++ [pid 816] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=815, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 819 attached ) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 819] set_robust_list(0x55555671f660, 24 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 819] <... set_robust_list resumed>) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 820 [pid 819] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 819] setpgid(0, 0./strace-static-x86_64: Process 820 attached ) = 0 [pid 818] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 816] <... write resumed>) = 1048576 [pid 819] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 819] write(3, "1000", 4) = 4 [pid 819] close(3) = 0 [pid 819] write(1, "executing program\n", 18executing program ) = 18 [pid 819] memfd_create("syzkaller", 0) = 3 [pid 819] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 819] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 816] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 820] set_robust_list(0x55555671f660, 24 [pid 816] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 820] <... set_robust_list resumed>) = 0 [pid 816] <... openat resumed>) = 4 [pid 816] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 820] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 816] ioctl(4, LOOP_CLR_FD [pid 820] <... prctl resumed>) = 0 [pid 816] <... ioctl resumed>) = 0 [pid 820] setpgid(0, 0) = 0 [pid 820] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 820] write(3, "1000", 4) = 4 [pid 820] close(3 [pid 816] ioctl(4, LOOP_SET_FD, 3 [pid 820] <... close resumed>) = 0 [pid 816] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program [pid 820] write(1, "executing program\n", 18 [pid 816] close(4 [pid 820] <... write resumed>) = 18 [pid 816] <... close resumed>) = 0 [pid 820] memfd_create("syzkaller", 0 [pid 816] close(3 [pid 817] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 816] <... close resumed>) = 0 [pid 820] <... memfd_create resumed>) = 3 [pid 820] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 818] <... write resumed>) = 1048576 [pid 820] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 819] <... write resumed>) = 1048576 [pid 819] munmap(0x7f1ddd1fa000, 138412032 [pid 818] munmap(0x7f1ddd1fa000, 138412032 [pid 816] chdir("./file0" [pid 819] <... munmap resumed>) = 0 [pid 819] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 819] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 819] ioctl(4, LOOP_CLR_FD) = 0 [pid 816] <... chdir resumed>) = 0 [pid 818] <... munmap resumed>) = 0 [pid 816] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 818] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 817] <... write resumed>) = 1048576 [pid 819] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 819] close(4) = 0 [pid 819] close(3 [pid 816] <... open resumed>) = 3 [pid 818] <... openat resumed>) = 4 [pid 818] ioctl(4, LOOP_SET_FD, 3 [pid 816] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 819] <... close resumed>) = 0 [pid 819] chdir("./file0") = 0 [pid 819] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 818] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 816] <... mount resumed>) = 0 [pid 818] ioctl(4, LOOP_CLR_FD [pid 816] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 817] munmap(0x7f1ddd1fa000, 138412032 [pid 819] <... open resumed>) = 3 [pid 818] <... ioctl resumed>) = 0 [pid 819] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 816] <... open resumed>) = 4 [pid 816] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 819] <... mount resumed>) = 0 [pid 819] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 816] <... mmap resumed>) = 0x20000000 [pid 819] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 818] ioctl(4, LOOP_SET_FD, 3 [pid 816] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 818] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 818] close(4 [pid 816] <... openat resumed>) = 5 [pid 818] <... close resumed>) = 0 [pid 816] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 818] close(3 [pid 819] <... mmap resumed>) = 0x20000000 [pid 818] <... close resumed>) = 0 [pid 819] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 819] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 819] exit_group(0 [pid 816] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 818] chdir("./file0" [pid 819] <... exit_group resumed>) = ? [pid 820] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 816] exit_group(0 [pid 819] +++ exited with 0 +++ [pid 816] <... exit_group resumed>) = ? [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=819, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 816] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=816, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 818] <... chdir resumed>) = 0 [pid 817] <... munmap resumed>) = 0 [pid 818] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 817] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 295] <... openat resumed>) = 3 [pid 299] <... ioctl resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] close(3 [pid 295] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 295] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 821 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 822 [pid 818] <... open resumed>) = 3 [pid 817] <... openat resumed>) = 4 [pid 818] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 817] ioctl(4, LOOP_SET_FD, 3 [pid 820] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 821 attached [pid 821] set_robust_list(0x55555671f660, 24) = 0 [pid 821] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 821] setpgid(0, 0 [pid 818] <... mount resumed>) = 0 [pid 817] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 821] <... setpgid resumed>) = 0 [pid 821] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 820] munmap(0x7f1ddd1fa000, 138412032 [pid 818] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 817] ioctl(4, LOOP_CLR_FD./strace-static-x86_64: Process 822 attached ) = 0 [pid 822] set_robust_list(0x55555671f660, 24) = 0 [pid 818] <... open resumed>) = 4 [pid 822] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 818] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 822] setpgid(0, 0) = 0 executing program [pid 822] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 822] write(3, "1000", 4) = 4 [pid 822] close(3) = 0 [pid 822] write(1, "executing program\n", 18) = 18 [pid 822] memfd_create("syzkaller", 0 [pid 818] <... mmap resumed>) = 0x20000000 [pid 822] <... memfd_create resumed>) = 3 [pid 822] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 817] ioctl(4, LOOP_SET_FD, 3 [pid 818] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 817] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 818] <... openat resumed>) = 5 [pid 817] close(4 [pid 818] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 817] <... close resumed>) = 0 [pid 821] <... openat resumed>) = 3 [pid 822] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 820] <... munmap resumed>) = 0 [pid 818] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 817] close(3) = 0 [pid 818] exit_group(0) = ? [pid 822] <... write resumed>) = 1048576 [pid 818] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=818, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 817] chdir("./file0") = 0 [pid 817] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 817] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 817] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 817] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 817] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 817] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 817] exit_group(0) = ? [pid 817] +++ exited with 0 +++ [pid 822] munmap(0x7f1ddd1fa000, 138412032 [pid 821] write(3, "1000", 4 [pid 822] <... munmap resumed>) = 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=817, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 822] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 822] <... openat resumed>) = 4 [pid 822] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 822] ioctl(4, LOOP_CLR_FD) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 822] ioctl(4, LOOP_SET_FD, 3 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 823 [pid 822] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 822] close(4) = 0 executing program [pid 821] <... write resumed>) = 4 ./strace-static-x86_64: Process 823 attached [pid 822] close(3 [pid 820] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 297] <... restart_syscall resumed>) = 0 [pid 823] set_robust_list(0x55555671f660, 24 [pid 821] close(3 [pid 820] <... openat resumed>) = 4 [pid 823] <... set_robust_list resumed>) = 0 [pid 821] <... close resumed>) = 0 [pid 820] ioctl(4, LOOP_SET_FD, 3 [pid 823] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 821] write(1, "executing program\n", 18 [pid 820] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 823] <... prctl resumed>) = 0 [pid 821] <... write resumed>) = 18 [pid 820] ioctl(4, LOOP_CLR_FD [pid 823] setpgid(0, 0 [pid 821] memfd_create("syzkaller", 0 [pid 820] <... ioctl resumed>) = 0 [pid 823] <... setpgid resumed>) = 0 [pid 821] <... memfd_create resumed>) = 3 [pid 823] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 821] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 823] <... openat resumed>) = 3 [pid 821] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 823] write(3, "1000", 4 [pid 822] <... close resumed>) = 0 [pid 821] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 823] <... write resumed>) = 4 [pid 820] ioctl(4, LOOP_SET_FD, 3 [pid 823] close(3 [pid 820] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program [pid 823] <... close resumed>) = 0 [pid 820] close(4 [pid 822] chdir("./file0" [pid 823] write(1, "executing program\n", 18 [pid 820] <... close resumed>) = 0 [pid 823] <... write resumed>) = 18 [pid 820] close(3 [pid 822] <... chdir resumed>) = 0 [pid 822] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 823] memfd_create("syzkaller", 0 [pid 822] <... open resumed>) = 3 [pid 820] <... close resumed>) = 0 [pid 297] <... openat resumed>) = 3 [pid 823] <... memfd_create resumed>) = 3 [pid 823] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 823] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 822] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 297] ioctl(3, LOOP_CLR_FD [pid 820] chdir("./file0") = 0 [pid 820] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 822] <... mount resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 820] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 822] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 820] <... mount resumed>) = 0 [pid 297] close(3 [pid 820] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 822] <... open resumed>) = 4 [pid 820] <... open resumed>) = 4 [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 822] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 820] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 820] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 822] <... mmap resumed>) = 0x20000000 [pid 820] <... openat resumed>) = 5 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 824 [pid 820] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 820] exit_group(0) = ? [pid 822] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 820] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=820, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 822] <... openat resumed>) = 5 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 822] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 822] exit_group(0) = ? [pid 822] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=822, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 821] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 824 attached [pid 824] set_robust_list(0x55555671f660, 24) = 0 [pid 824] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 824] setpgid(0, 0) = 0 [pid 824] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 821] munmap(0x7f1ddd1fa000, 138412032 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 298] <... openat resumed>) = 3 [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 824] write(3, "1000", 4 [pid 295] <... ioctl resumed>) = 0 [pid 295] close(3 [pid 298] <... ioctl resumed>) = 0 [pid 821] <... munmap resumed>) = 0 [pid 821] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 821] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 821] ioctl(4, LOOP_CLR_FD) = 0 [pid 823] <... write resumed>) = 1048576 [pid 295] <... close resumed>) = 0 [pid 824] <... write resumed>) = 4 [pid 298] close(3 [pid 823] munmap(0x7f1ddd1fa000, 138412032 [pid 298] <... close resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 824] close(3 [pid 823] <... munmap resumed>) = 0 [pid 823] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 823] ioctl(4, LOOP_SET_FD, 3 [pid 821] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 821] close(4) = 0 [pid 821] close(3 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 824] <... close resumed>) = 0 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 825 [pid 823] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 823] ioctl(4, LOOP_CLR_FD) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 826 [pid 824] write(1, "executing program\n", 18executing program ) = 18 [pid 823] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 823] close(4) = 0 [pid 823] close(3 [pid 824] memfd_create("syzkaller", 0) = 3 [pid 824] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 823] <... close resumed>) = 0 [pid 821] <... close resumed>) = 0 [pid 821] chdir("./file0") = 0 [pid 821] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 821] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 825 attached [pid 823] chdir("./file0") = 0 [pid 825] set_robust_list(0x55555671f660, 24 [pid 823] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 825] <... set_robust_list resumed>) = 0 [pid 825] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 823] <... open resumed>) = 3 [pid 821] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 825] <... prctl resumed>) = 0 [pid 825] setpgid(0, 0) = 0 [pid 825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 821] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 825] <... openat resumed>) = 3 [pid 823] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULLexecuting program ) = 0 [pid 825] write(3, "1000", 4) = 4 [pid 825] close(3) = 0 [pid 825] write(1, "executing program\n", 18) = 18 [pid 825] memfd_create("syzkaller", 0 [pid 823] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 825] <... memfd_create resumed>) = 3 [pid 825] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 823] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 825] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 823] <... mmap resumed>) = 0x20000000 [pid 821] <... mmap resumed>) = 0x20000000 [pid 824] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 821] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 821] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) ./strace-static-x86_64: Process 826 attached [pid 821] exit_group(0) = ? [pid 826] set_robust_list(0x55555671f660, 24 [pid 821] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=821, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 823] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] <... restart_syscall resumed>) = 0 [pid 823] <... openat resumed>) = 5 [pid 823] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 823] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 823] exit_group(0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 827 [pid 823] <... exit_group resumed>) = ? [pid 826] <... set_robust_list resumed>) = 0 [pid 826] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 826] setpgid(0, 0) = 0 [pid 823] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=823, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 826] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 826] write(3, "1000", 4) = 4 [pid 826] close(3) = 0 [pid 825] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576executing program [pid 826] write(1, "executing program\n", 18) = 18 ./strace-static-x86_64: Process 827 attached [pid 827] set_robust_list(0x55555671f660, 24) = 0 [pid 827] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 826] memfd_create("syzkaller", 0) = 3 [pid 827] <... prctl resumed>) = 0 [pid 827] setpgid(0, 0) = 0 [pid 827] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 826] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 827] write(3, "1000", 4) = 4 [pid 827] close(3) = 0 [pid 827] write(1, "executing program\n", 18executing program ) = 18 [pid 827] memfd_create("syzkaller", 0) = 3 [pid 827] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 296] <... restart_syscall resumed>) = 0 [pid 826] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 828 [pid 825] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 828 attached [pid 825] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 828] set_robust_list(0x55555671f660, 24) = 0 [pid 828] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 828] setpgid(0, 0) = 0 [pid 825] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 828] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 825] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 825] ioctl(4, LOOP_CLR_FD) = 0 [pid 828] <... openat resumed>) = 3 [pid 828] write(3, "1000", 4) = 4 [pid 825] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 825] close(4) = 0 [pid 825] close(3 [pid 828] close(3) = 0 [pid 828] write(1, "executing program\n", 18executing program ) = 18 [pid 828] memfd_create("syzkaller", 0) = 3 [pid 824] <... write resumed>) = 1048576 [pid 828] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 824] munmap(0x7f1ddd1fa000, 138412032 [pid 826] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 824] <... munmap resumed>) = 0 [pid 827] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 824] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 825] <... close resumed>) = 0 [pid 825] chdir("./file0" [pid 824] <... openat resumed>) = 4 [pid 825] <... chdir resumed>) = 0 [pid 824] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 824] ioctl(4, LOOP_CLR_FD) = 0 [pid 825] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 824] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 824] close(4) = 0 [pid 824] close(3 [pid 825] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 824] <... close resumed>) = 0 [pid 825] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 824] chdir("./file0" [pid 825] <... open resumed>) = 4 [pid 825] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 828] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 824] <... chdir resumed>) = 0 [pid 824] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 826] <... write resumed>) = 1048576 [pid 824] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 826] munmap(0x7f1ddd1fa000, 138412032 [pid 825] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 824] <... mount resumed>) = 0 [pid 824] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 824] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 825] <... openat resumed>) = 5 [pid 825] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 825] exit_group(0) = ? [pid 824] <... mmap resumed>) = 0x20000000 [pid 826] <... munmap resumed>) = 0 [pid 824] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 826] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 824] <... openat resumed>) = 5 [pid 826] <... openat resumed>) = 4 [pid 824] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 826] ioctl(4, LOOP_SET_FD, 3 [pid 824] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 826] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 826] ioctl(4, LOOP_CLR_FD [pid 824] exit_group(0 [pid 826] <... ioctl resumed>) = 0 [pid 824] <... exit_group resumed>) = ? [pid 825] +++ exited with 0 +++ [pid 824] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=825, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=824, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 827] <... write resumed>) = 1048576 [pid 826] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 826] close(4) = 0 [pid 826] close(3) = 0 [pid 827] munmap(0x7f1ddd1fa000, 138412032 [pid 826] chdir("./file0") = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 826] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 827] <... munmap resumed>) = 0 [pid 827] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 829 [pid 827] <... openat resumed>) = 4 [pid 826] <... open resumed>) = 3 [pid 827] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 827] ioctl(4, LOOP_CLR_FD) = 0 [pid 827] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 295] <... restart_syscall resumed>) = 0 [pid 826] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 826] <... mount resumed>) = 0 [pid 827] close(4) = 0 [pid 827] close(3 [pid 826] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 830 [pid 826] <... open resumed>) = 4 [pid 826] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 827] <... close resumed>) = 0 [pid 827] chdir("./file0") = 0 [pid 827] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 827] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 826] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 829 attached ) = 5 [pid 826] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 829] set_robust_list(0x55555671f660, 24 [pid 826] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 829] <... set_robust_list resumed>) = 0 [pid 826] exit_group(0) = ? [pid 828] <... write resumed>) = 1048576 [pid 827] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 828] munmap(0x7f1ddd1fa000, 138412032 [pid 827] <... open resumed>) = 4 [pid 828] <... munmap resumed>) = 0 [pid 827] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 826] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=826, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 829] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 829] <... prctl resumed>) = 0 [pid 827] <... mmap resumed>) = 0x20000000 [pid 828] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 828] ioctl(4, LOOP_SET_FD, 3 [pid 298] <... restart_syscall resumed>) = 0 [pid 829] setpgid(0, 0) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 829] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 828] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 828] ioctl(4, LOOP_CLR_FD) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 831 [pid 829] <... openat resumed>) = 3 [pid 829] write(3, "1000", 4) = 4 [pid 829] close(3) = 0 [pid 829] write(1, "executing program\n", 18executing program ) = 18 [pid 829] memfd_create("syzkaller", 0) = 3 [pid 829] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 827] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 827] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 827] exit_group(0) = ? [pid 828] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 828] close(4) = 0 [pid 828] close(3) = 0 [pid 827] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=827, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 830 attached [pid 830] set_robust_list(0x55555671f660, 24) = 0 [pid 830] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 830] setpgid(0, 0) = 0 [pid 830] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 828] chdir("./file0") = 0 [pid 828] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 830] write(3, "1000", 4 [pid 828] <... open resumed>) = 3 [pid 830] <... write resumed>) = 4 [pid 830] close(3executing program ) = 0 [pid 830] write(1, "executing program\n", 18) = 18 [pid 830] memfd_create("syzkaller", 0) = 3 [pid 830] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 828] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 299] close(3./strace-static-x86_64: Process 831 attached [pid 830] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 829] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 299] <... close resumed>) = 0 [pid 831] set_robust_list(0x55555671f660, 24 [pid 828] <... mount resumed>) = 0 [pid 828] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 828] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 828] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 828] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 831] <... set_robust_list resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 832 [pid 831] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 831] setpgid(0, 0 [pid 828] exit_group(0 [pid 831] <... setpgid resumed>) = 0 [pid 828] <... exit_group resumed>) = ? [pid 831] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 829] <... write resumed>) = 1048576 [pid 831] <... openat resumed>) = 3 [pid 829] munmap(0x7f1ddd1fa000, 138412032 [pid 831] write(3, "1000", 4executing program ) = 4 [pid 831] close(3 [pid 829] <... munmap resumed>) = 0 [pid 828] +++ exited with 0 +++ [pid 831] <... close resumed>) = 0 [pid 829] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 831] write(1, "executing program\n", 18) = 18 [pid 829] <... openat resumed>) = 4 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=828, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 831] memfd_create("syzkaller", 0 [pid 829] ioctl(4, LOOP_SET_FD, 3 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 831] <... memfd_create resumed>) = 3 [pid 829] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 831] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 829] ioctl(4, LOOP_CLR_FD [pid 831] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 829] <... ioctl resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 833 ./strace-static-x86_64: Process 832 attached [pid 832] set_robust_list(0x55555671f660, 24) = 0 [pid 832] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 832] setpgid(0, 0 [pid 831] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 832] <... setpgid resumed>) = 0 [pid 832] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 829] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 829] close(4) = 0 [pid 829] close(3 [pid 832] <... openat resumed>) = 3 [pid 832] write(3, "1000", 4) = 4 [pid 832] close(3) = 0 [pid 832] write(1, "executing program\n", 18executing program ) = 18 [pid 832] memfd_create("syzkaller", 0) = 3 [pid 832] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 829] <... close resumed>) = 0 [pid 831] <... write resumed>) = 1048576 [pid 829] chdir("./file0" [pid 830] <... write resumed>) = 1048576 [pid 830] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 830] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 830] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 830] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 833 attached [pid 829] <... chdir resumed>) = 0 [pid 829] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 833] set_robust_list(0x55555671f660, 24) = 0 [pid 829] <... open resumed>) = 3 [pid 829] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 831] munmap(0x7f1ddd1fa000, 138412032 [pid 829] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 829] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 830] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 830] close(4) = 0 [pid 830] close(3 [pid 829] <... mmap resumed>) = 0x20000000 [pid 829] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 833] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 829] <... openat resumed>) = 5 [pid 831] <... munmap resumed>) = 0 [pid 829] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 831] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 829] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 829] exit_group(0 [pid 831] <... openat resumed>) = 4 [pid 829] <... exit_group resumed>) = ? [pid 829] +++ exited with 0 +++ [pid 831] ioctl(4, LOOP_SET_FD, 3 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=829, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 833] <... prctl resumed>) = 0 [pid 833] setpgid(0, 0) = 0 [pid 833] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 833] write(3, "1000", 4) = 4 [pid 833] close(3) = 0 [pid 833] write(1, "executing program\n", 18executing program ) = 18 [pid 833] memfd_create("syzkaller", 0) = 3 [pid 833] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 831] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) ./strace-static-x86_64: Process 834 attached [pid 831] ioctl(4, LOOP_CLR_FD [pid 834] set_robust_list(0x55555671f660, 24 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 834 [pid 834] <... set_robust_list resumed>) = 0 [pid 831] <... ioctl resumed>) = 0 [pid 834] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 834] setpgid(0, 0) = 0 [pid 834] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 834] write(3, "1000", 4) = 4 [pid 834] close(3) = 0 executing program [pid 834] write(1, "executing program\n", 18) = 18 [pid 831] ioctl(4, LOOP_SET_FD, 3 [pid 834] memfd_create("syzkaller", 0 [pid 831] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 834] <... memfd_create resumed>) = 3 [pid 831] close(4 [pid 834] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 831] <... close resumed>) = 0 [pid 834] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 831] close(3 [pid 830] <... close resumed>) = 0 [pid 832] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 830] chdir("./file0") = 0 [pid 830] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 830] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 830] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 830] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 831] <... close resumed>) = 0 [pid 831] chdir("./file0") = 0 [pid 831] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 830] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 831] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 831] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 831] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 830] <... openat resumed>) = 5 [pid 834] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 830] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 830] exit_group(0 [pid 831] <... mmap resumed>) = 0x20000000 [pid 831] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 830] <... exit_group resumed>) = ? [pid 830] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=830, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 831] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 831] exit_group(0) = ? [pid 831] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=831, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 833] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 295] close(3 [pid 298] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 834] <... write resumed>) = 1048576 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 835 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 836 [pid 832] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 835 attached [pid 834] munmap(0x7f1ddd1fa000, 138412032 [pid 835] set_robust_list(0x55555671f660, 24) = 0 [pid 834] <... munmap resumed>) = 0 [pid 835] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 834] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 832] munmap(0x7f1ddd1fa000, 138412032 [pid 835] <... prctl resumed>) = 0 [pid 834] <... openat resumed>) = 4 [pid 835] setpgid(0, 0 [pid 834] ioctl(4, LOOP_SET_FD, 3 [pid 835] <... setpgid resumed>) = 0 [pid 834] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 835] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 834] ioctl(4, LOOP_CLR_FD [pid 835] <... openat resumed>) = 3 [pid 834] <... ioctl resumed>) = 0 [pid 835] write(3, "1000", 4executing program ) = 4 [pid 835] close(3) = 0 [pid 835] write(1, "executing program\n", 18) = 18 [pid 835] memfd_create("syzkaller", 0) = 3 [pid 835] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 832] <... munmap resumed>) = 0 [pid 832] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 832] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 832] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 836 attached [pid 836] set_robust_list(0x55555671f660, 24) = 0 [pid 836] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 836] setpgid(0, 0 [pid 832] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 832] close(4) = 0 [pid 832] close(3) = 0 [pid 836] <... setpgid resumed>) = 0 [pid 836] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 835] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 834] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 834] close(4) = 0 [pid 834] close(3 [pid 836] <... openat resumed>) = 3 [pid 836] write(3, "1000", 4) = 4 [pid 836] close(3) = 0 [pid 836] write(1, "executing program\n", 18executing program ) = 18 [pid 836] memfd_create("syzkaller", 0) = 3 [pid 836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 834] <... close resumed>) = 0 [pid 834] chdir("./file0") = 0 [pid 834] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 833] <... write resumed>) = 1048576 [pid 833] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 832] chdir("./file0") = 0 [pid 832] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 833] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 834] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 834] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 833] ioctl(4, LOOP_SET_FD, 3 [pid 834] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 833] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 833] ioctl(4, LOOP_CLR_FD) = 0 [pid 832] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 832] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 834] <... mmap resumed>) = 0x20000000 [pid 834] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 834] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 833] ioctl(4, LOOP_SET_FD, 3 [pid 834] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 833] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 833] close(4 [pid 834] exit_group(0) = ? [pid 833] <... close resumed>) = 0 [pid 833] close(3 [pid 834] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=834, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 832] <... open resumed>) = 4 [pid 832] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 836] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 832] <... mmap resumed>) = 0x20000000 [pid 832] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 832] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 832] exit_group(0) = ? [pid 835] <... write resumed>) = 1048576 [pid 832] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=832, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 833] <... close resumed>) = 0 [pid 833] chdir("./file0") = 0 [pid 833] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 833] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 833] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 836] <... write resumed>) = 1048576 [pid 835] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... ioctl resumed>) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... restart_syscall resumed>) = 0 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 837 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 838 [pid 833] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 833] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 833] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 833] exit_group(0) = ? [pid 835] <... munmap resumed>) = 0 [pid 836] munmap(0x7f1ddd1fa000, 138412032 [pid 835] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 835] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 835] ioctl(4, LOOP_CLR_FD) = 0 [pid 836] <... munmap resumed>) = 0 [pid 836] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 836] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 836] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 838 attached [pid 838] set_robust_list(0x55555671f660, 24 [pid 835] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 835] close(4) = 0 [pid 835] close(3 [pid 838] <... set_robust_list resumed>) = 0 [pid 838] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 833] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=833, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 838] <... prctl resumed>) = 0 [pid 838] setpgid(0, 0) = 0 [pid 838] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 838] write(3, "1000", 4) = 4 [pid 838] close(3) = 0 executing program [pid 838] write(1, "executing program\n", 18) = 18 [pid 835] <... close resumed>) = 0 [pid 838] memfd_create("syzkaller", 0 [pid 835] chdir("./file0" [pid 836] ioctl(4, LOOP_SET_FD, 3 [pid 835] <... chdir resumed>) = 0 [pid 836] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 835] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 836] close(4 [pid 838] <... memfd_create resumed>) = 3 [pid 838] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 835] <... open resumed>) = 3 [pid 836] <... close resumed>) = 0 [pid 835] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 836] close(3 [pid 835] <... mount resumed>) = 0 ./strace-static-x86_64: Process 837 attached [pid 837] set_robust_list(0x55555671f660, 24) = 0 [pid 837] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 837] setpgid(0, 0) = 0 [pid 837] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 836] <... close resumed>) = 0 [pid 835] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 837] <... openat resumed>) = 3 [pid 835] <... open resumed>) = 4 [pid 836] chdir("./file0" [pid 835] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 837] write(3, "1000", 4) = 4 [pid 837] close(3) = 0 [pid 837] write(1, "executing program\n", 18) = 18 [pid 837] memfd_create("syzkaller", 0) = 3 [pid 835] <... mmap resumed>) = 0x20000000 [pid 836] <... chdir resumed>) = 0 [pid 835] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 836] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 837] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 835] <... openat resumed>) = 5 [pid 836] <... open resumed>) = 3 [pid 835] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 839 [pid 836] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 835] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 836] <... mount resumed>) = 0 [pid 836] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 835] exit_group(0./strace-static-x86_64: Process 839 attached [pid 836] <... open resumed>) = 4 [pid 835] <... exit_group resumed>) = ? [pid 836] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 839] set_robust_list(0x55555671f660, 24) = 0 [pid 839] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 839] setpgid(0, 0) = 0 [pid 835] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=835, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 839] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 836] <... mmap resumed>) = 0x20000000 [pid 836] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 836] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 839] <... openat resumed>) = 3 [pid 839] write(3, "1000", 4 [pid 836] exit_group(0) = ? [pid 839] <... write resumed>) = 4 [pid 839] close(3) = 0 [pid 839] write(1, "executing program\n", 18executing program ) = 18 [pid 839] memfd_create("syzkaller", 0 [pid 836] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=836, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 839] <... memfd_create resumed>) = 3 [pid 839] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 838] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 295] close(3 [pid 298] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 840 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 841 [pid 837] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 841 attached ./strace-static-x86_64: Process 840 attached [pid 841] set_robust_list(0x55555671f660, 24) = 0 [pid 840] set_robust_list(0x55555671f660, 24 [pid 841] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 840] <... set_robust_list resumed>) = 0 [pid 841] <... prctl resumed>) = 0 [pid 841] setpgid(0, 0 [pid 840] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 841] <... setpgid resumed>) = 0 [pid 840] <... prctl resumed>) = 0 [pid 841] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 840] setpgid(0, 0 [pid 841] <... openat resumed>) = 3 [pid 840] <... setpgid resumed>) = 0 [pid 841] write(3, "1000", 4) = 4 [pid 840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 841] close(3executing program [pid 840] <... openat resumed>) = 3 [pid 841] <... close resumed>) = 0 [pid 840] write(3, "1000", 4 [pid 841] write(1, "executing program\n", 18 [pid 840] <... write resumed>) = 4 [pid 841] <... write resumed>) = 18 [pid 840] close(3 [pid 841] memfd_create("syzkaller", 0 [pid 840] <... close resumed>) = 0 [pid 841] <... memfd_create resumed>) = 3 [pid 841] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 840] write(1, "executing program\n", 18executing program [pid 841] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 840] <... write resumed>) = 18 [pid 838] <... write resumed>) = 1048576 [pid 840] memfd_create("syzkaller", 0) = 3 [pid 840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 837] <... write resumed>) = 1048576 [pid 839] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 838] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 838] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 838] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 838] ioctl(4, LOOP_CLR_FD) = 0 [pid 840] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 838] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 838] close(4) = 0 [pid 838] close(3 [pid 841] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 837] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 837] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 837] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 837] ioctl(4, LOOP_CLR_FD) = 0 [pid 838] <... close resumed>) = 0 [pid 837] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 837] close(4) = 0 [pid 837] close(3 [pid 839] <... write resumed>) = 1048576 [pid 838] chdir("./file0") = 0 [pid 838] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 838] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 837] <... close resumed>) = 0 [pid 838] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 838] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 837] chdir("./file0" [pid 838] <... mmap resumed>) = 0x20000000 [pid 837] <... chdir resumed>) = 0 [pid 837] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 839] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 837] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 837] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 841] <... write resumed>) = 1048576 [pid 837] <... open resumed>) = 4 [pid 839] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 837] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 839] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 837] <... mmap resumed>) = 0x20000000 [pid 839] ioctl(4, LOOP_CLR_FD) = 0 [pid 838] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 838] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 838] exit_group(0) = ? [pid 839] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 840] <... write resumed>) = 1048576 [pid 841] munmap(0x7f1ddd1fa000, 138412032 [pid 840] munmap(0x7f1ddd1fa000, 138412032 [pid 839] close(4 [pid 841] <... munmap resumed>) = 0 [pid 839] <... close resumed>) = 0 [pid 840] <... munmap resumed>) = 0 [pid 841] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 840] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 841] <... openat resumed>) = 4 [pid 840] <... openat resumed>) = 4 [pid 841] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 840] ioctl(4, LOOP_SET_FD, 3 [pid 841] ioctl(4, LOOP_CLR_FD [pid 840] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 841] <... ioctl resumed>) = 0 [pid 840] ioctl(4, LOOP_CLR_FD) = 0 [pid 839] close(3 [pid 841] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 841] close(4) = 0 [pid 841] close(3 [pid 840] ioctl(4, LOOP_SET_FD, 3 [pid 838] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=838, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 841] <... close resumed>) = 0 [pid 840] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 841] chdir("./file0" [pid 840] close(4 [pid 841] <... chdir resumed>) = 0 [pid 840] <... close resumed>) = 0 [pid 841] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 840] close(3 [pid 837] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 837] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 837] exit_group(0) = ? [pid 837] +++ exited with 0 +++ [pid 840] <... close resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=837, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 841] <... open resumed>) = 3 [pid 840] chdir("./file0" [pid 841] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 840] <... chdir resumed>) = 0 [pid 841] <... mount resumed>) = 0 [pid 840] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 841] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 840] <... open resumed>) = 3 [pid 299] <... restart_syscall resumed>) = 0 [pid 841] <... open resumed>) = 4 [pid 840] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 841] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 840] <... mount resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 841] <... mmap resumed>) = 0x20000000 [pid 840] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 841] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 842 [pid 840] <... open resumed>) = 4 [pid 841] <... openat resumed>) = 5 [pid 840] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 841] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 839] <... close resumed>) = 0 [pid 839] chdir("./file0" [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 840] <... mmap resumed>) = 0x20000000 [pid 297] <... openat resumed>) = 3 [pid 841] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 297] ioctl(3, LOOP_CLR_FD [pid 840] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 841] exit_group(0 [pid 297] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 841] <... exit_group resumed>) = ? [pid 840] <... openat resumed>) = 5 [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 843 [pid 839] <... chdir resumed>) = 0 [pid 841] +++ exited with 0 +++ [pid 839] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 840] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=841, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 840] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 840] exit_group(0) = ? [pid 839] <... open resumed>) = 3 [pid 839] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 840] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=840, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 839] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 839] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 295] close(3 [pid 298] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 844 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 845 [pid 839] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 839] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 839] exit_group(0) = ? ./strace-static-x86_64: Process 843 attached [pid 843] set_robust_list(0x55555671f660, 24) = 0 ./strace-static-x86_64: Process 844 attached ./strace-static-x86_64: Process 845 attached [pid 843] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 842 attached [pid 842] set_robust_list(0x55555671f660, 24) = 0 [pid 842] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 843] <... prctl resumed>) = 0 [pid 843] setpgid(0, 0) = 0 [pid 843] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 842] <... prctl resumed>) = 0 [pid 842] setpgid(0, 0) = 0 [pid 842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 843] <... openat resumed>) = 3 [pid 842] <... openat resumed>) = 3 executing program [pid 843] write(3, "1000", 4) = 4 [pid 843] close(3) = 0 [pid 842] write(3, "1000", 4) = 4 [pid 843] write(1, "executing program\n", 18 [pid 839] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=839, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 843] <... write resumed>) = 18 [pid 842] close(3) = 0 [pid 843] memfd_create("syzkaller", 0executing program [pid 842] write(1, "executing program\n", 18) = 18 [pid 842] memfd_create("syzkaller", 0 [pid 843] <... memfd_create resumed>) = 3 [pid 844] set_robust_list(0x55555671f660, 24 [pid 842] <... memfd_create resumed>) = 3 [pid 845] set_robust_list(0x55555671f660, 24 [pid 844] <... set_robust_list resumed>) = 0 [pid 845] <... set_robust_list resumed>) = 0 [pid 843] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 844] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 843] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 845] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 844] <... prctl resumed>) = 0 [pid 845] <... prctl resumed>) = 0 executing program executing program [pid 845] setpgid(0, 0 [pid 844] setpgid(0, 0 [pid 845] <... setpgid resumed>) = 0 [pid 844] <... setpgid resumed>) = 0 [pid 845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 844] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 845] <... openat resumed>) = 3 [pid 842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 844] <... openat resumed>) = 3 [pid 845] write(3, "1000", 4 [pid 844] write(3, "1000", 4 [pid 845] <... write resumed>) = 4 [pid 844] <... write resumed>) = 4 [pid 845] close(3 [pid 844] close(3 [pid 845] <... close resumed>) = 0 [pid 844] <... close resumed>) = 0 [pid 845] write(1, "executing program\n", 18 [pid 844] write(1, "executing program\n", 18 [pid 845] <... write resumed>) = 18 [pid 844] <... write resumed>) = 18 [pid 845] memfd_create("syzkaller", 0 [pid 842] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 845] <... memfd_create resumed>) = 3 [pid 844] memfd_create("syzkaller", 0 [pid 845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 844] <... memfd_create resumed>) = 3 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 846 [pid 845] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 842] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 843] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 844] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 842] <... write resumed>) = 1048576 [pid 843] <... write resumed>) = 1048576 [pid 842] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 843] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 842] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 842] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 842] ioctl(4, LOOP_CLR_FD) = 0 [pid 843] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 843] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 843] ioctl(4, LOOP_CLR_FD) = 0 [pid 842] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 842] close(4) = 0 [pid 842] close(3) = 0 [pid 843] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 843] close(4) = 0 [pid 843] close(3 [pid 844] <... write resumed>) = 1048576 [pid 843] <... close resumed>) = 0 [pid 842] chdir("./file0") = 0 [pid 842] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 843] chdir("./file0") = 0 [pid 843] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000./strace-static-x86_64: Process 846 attached [pid 845] <... write resumed>) = 1048576 [pid 844] munmap(0x7f1ddd1fa000, 138412032 [pid 846] set_robust_list(0x55555671f660, 24 [pid 844] <... munmap resumed>) = 0 [pid 846] <... set_robust_list resumed>) = 0 [pid 845] munmap(0x7f1ddd1fa000, 138412032 [pid 844] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 846] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 845] <... munmap resumed>) = 0 [pid 846] <... prctl resumed>) = 0 [pid 844] <... openat resumed>) = 4 [pid 846] setpgid(0, 0 [pid 845] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 846] <... setpgid resumed>) = 0 [pid 844] ioctl(4, LOOP_SET_FD, 3executing program [pid 845] <... openat resumed>) = 4 [pid 846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 845] ioctl(4, LOOP_SET_FD, 3 [pid 844] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 846] <... openat resumed>) = 3 [pid 846] write(3, "1000", 4 [pid 845] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 844] ioctl(4, LOOP_CLR_FD [pid 846] <... write resumed>) = 4 [pid 845] ioctl(4, LOOP_CLR_FD [pid 844] <... ioctl resumed>) = 0 [pid 846] close(3 [pid 845] <... ioctl resumed>) = 0 [pid 846] <... close resumed>) = 0 [pid 846] write(1, "executing program\n", 18) = 18 [pid 846] memfd_create("syzkaller", 0) = 3 [pid 846] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 843] <... open resumed>) = 3 [pid 842] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 843] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 842] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 843] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 842] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 843] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 842] <... mmap resumed>) = 0x20000000 [pid 843] <... mmap resumed>) = 0x20000000 [pid 843] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 842] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 843] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 842] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 843] exit_group(0 [pid 842] exit_group(0 [pid 843] <... exit_group resumed>) = ? [pid 846] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 844] ioctl(4, LOOP_SET_FD, 3 [pid 845] ioctl(4, LOOP_SET_FD, 3 [pid 844] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 845] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 844] close(4 [pid 845] close(4 [pid 844] <... close resumed>) = 0 [pid 845] <... close resumed>) = 0 [pid 844] close(3 [pid 845] close(3 [pid 842] <... exit_group resumed>) = ? [pid 842] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=842, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 843] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=843, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 844] <... close resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 847 [pid 845] <... close resumed>) = 0 [pid 844] chdir("./file0" [pid 845] chdir("./file0" [pid 844] <... chdir resumed>) = 0 [pid 845] <... chdir resumed>) = 0 [pid 844] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 845] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 844] <... open resumed>) = 3 [pid 297] <... ioctl resumed>) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 845] <... open resumed>) = 3 [pid 844] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 845] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 844] <... mount resumed>) = 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 848 [pid 845] <... mount resumed>) = 0 [pid 844] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 845] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 844] <... open resumed>) = 4 [pid 845] <... open resumed>) = 4 [pid 844] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 845] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0./strace-static-x86_64: Process 848 attached ./strace-static-x86_64: Process 847 attached [pid 846] <... write resumed>) = 1048576 [pid 845] <... mmap resumed>) = 0x20000000 [pid 844] <... mmap resumed>) = 0x20000000 [pid 848] set_robust_list(0x55555671f660, 24 [pid 846] munmap(0x7f1ddd1fa000, 138412032 [pid 845] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 848] <... set_robust_list resumed>) = 0 [pid 847] set_robust_list(0x55555671f660, 24 [pid 844] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 845] <... openat resumed>) = 5 [pid 844] <... openat resumed>) = 5 [pid 848] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 845] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 844] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 848] <... prctl resumed>) = 0 [pid 845] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 844] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 848] setpgid(0, 0 [pid 845] exit_group(0 [pid 844] exit_group(0 [pid 848] <... setpgid resumed>) = 0 [pid 846] <... munmap resumed>) = 0 [pid 845] <... exit_group resumed>) = ? [pid 844] <... exit_group resumed>) = ? [pid 847] <... set_robust_list resumed>) = 0 [pid 845] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=845, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 844] +++ exited with 0 +++ [pid 848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 846] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=844, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 848] <... openat resumed>) = 3 [pid 847] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 846] <... openat resumed>) = 4 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 848] write(3, "1000", 4) = 4 [pid 847] <... prctl resumed>) = 0 [pid 846] ioctl(4, LOOP_SET_FD, 3 [pid 848] close(3executing program ) = 0 [pid 847] setpgid(0, 0 [pid 846] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 848] write(1, "executing program\n", 18) = 18 [pid 847] <... setpgid resumed>) = 0 [pid 846] ioctl(4, LOOP_CLR_FD [pid 848] memfd_create("syzkaller", 0 [pid 846] <... ioctl resumed>) = 0 [pid 847] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 848] <... memfd_create resumed>) = 3 [pid 847] <... openat resumed>) = 3 [pid 848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 847] write(3, "1000", 4executing program ) = 4 [pid 847] close(3 [pid 846] ioctl(4, LOOP_SET_FD, 3 [pid 847] <... close resumed>) = 0 [pid 846] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 847] write(1, "executing program\n", 18 [pid 846] close(4 [pid 847] <... write resumed>) = 18 [pid 846] <... close resumed>) = 0 [pid 847] memfd_create("syzkaller", 0 [pid 846] close(3 [pid 847] <... memfd_create resumed>) = 3 [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 298] close(3 [pid 295] close(3 [pid 298] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 849 attached [pid 848] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 847] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 846] <... close resumed>) = 0 [pid 847] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 846] chdir("./file0" [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 850 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 849 [pid 846] <... chdir resumed>) = 0 [pid 846] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 846] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 846] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 846] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 848] <... write resumed>) = 1048576 [pid 846] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 849] set_robust_list(0x55555671f660, 24) = 0 [pid 846] <... openat resumed>) = 5 [pid 849] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 846] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 849] <... prctl resumed>) = 0 [pid 846] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 849] setpgid(0, 0 [pid 846] exit_group(0 [pid 849] <... setpgid resumed>) = 0 [pid 846] <... exit_group resumed>) = ? [pid 846] +++ exited with 0 +++ [pid 849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=846, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 847] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 849] <... openat resumed>) = 3 [pid 296] <... restart_syscall resumed>) = 0 [pid 847] <... write resumed>) = 1048576 [pid 849] write(3, "1000", 4 [pid 848] munmap(0x7f1ddd1fa000, 138412032 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 851 ./strace-static-x86_64: Process 850 attached [pid 850] set_robust_list(0x55555671f660, 24) = 0 [pid 850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 850] setpgid(0, 0) = 0 [pid 850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 850] write(3, "1000", 4) = 4 [pid 850] close(3) = 0 [pid 850] write(1, "executing program\n", 18executing program ) = 18 [pid 850] memfd_create("syzkaller", 0) = 3 [pid 850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 849] <... write resumed>) = 4 [pid 848] <... munmap resumed>) = 0 [pid 849] close(3 [pid 848] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 847] munmap(0x7f1ddd1fa000, 138412032executing program [pid 849] <... close resumed>) = 0 [pid 848] <... openat resumed>) = 4 [pid 847] <... munmap resumed>) = 0 [pid 848] ioctl(4, LOOP_SET_FD, 3 [pid 849] write(1, "executing program\n", 18 [pid 847] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 849] <... write resumed>) = 18 [pid 848] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 849] memfd_create("syzkaller", 0 [pid 848] ioctl(4, LOOP_CLR_FD [pid 847] <... openat resumed>) = 4 [pid 849] <... memfd_create resumed>) = 3 [pid 848] <... ioctl resumed>) = 0 [pid 847] ioctl(4, LOOP_SET_FD, 3 [pid 849] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 847] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 849] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 847] ioctl(4, LOOP_CLR_FD./strace-static-x86_64: Process 851 attached [pid 851] set_robust_list(0x55555671f660, 24) = 0 [pid 851] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 851] setpgid(0, 0) = 0 [pid 851] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 851] write(3, "1000", 4) = 4 [pid 851] close(3) = 0 [pid 851] write(1, "executing program\n", 18executing program ) = 18 [pid 849] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 847] <... ioctl resumed>) = 0 [pid 848] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 848] close(4) = 0 [pid 848] close(3 [pid 851] memfd_create("syzkaller", 0) = 3 [pid 851] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 848] <... close resumed>) = 0 [pid 848] chdir("./file0" [pid 847] ioctl(4, LOOP_SET_FD, 3 [pid 848] <... chdir resumed>) = 0 [pid 847] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 848] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 847] close(4 [pid 848] <... open resumed>) = 3 [pid 847] <... close resumed>) = 0 [pid 848] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 847] close(3 [pid 848] <... mount resumed>) = 0 [pid 847] <... close resumed>) = 0 [pid 848] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 847] chdir("./file0" [pid 848] <... open resumed>) = 4 [pid 847] <... chdir resumed>) = 0 [pid 848] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 847] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 848] <... mmap resumed>) = 0x20000000 [pid 847] <... open resumed>) = 3 [pid 848] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 847] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 848] <... openat resumed>) = 5 [pid 847] <... mount resumed>) = 0 [pid 848] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 850] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 848] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 847] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 851] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 850] <... write resumed>) = 1048576 [pid 848] exit_group(0) = ? [pid 847] <... open resumed>) = 4 [pid 850] munmap(0x7f1ddd1fa000, 138412032 [pid 848] +++ exited with 0 +++ [pid 847] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=848, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 850] <... munmap resumed>) = 0 [pid 847] <... mmap resumed>) = 0x20000000 [pid 849] <... write resumed>) = 1048576 [pid 847] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 849] munmap(0x7f1ddd1fa000, 138412032 [pid 850] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 847] <... openat resumed>) = 5 [pid 850] <... openat resumed>) = 4 [pid 849] <... munmap resumed>) = 0 [pid 847] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 849] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 847] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 849] <... openat resumed>) = 4 [pid 847] exit_group(0 [pid 849] ioctl(4, LOOP_SET_FD, 3 [pid 847] <... exit_group resumed>) = ? [pid 849] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 850] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 850] ioctl(4, LOOP_CLR_FD) = 0 [pid 847] +++ exited with 0 +++ [pid 849] ioctl(4, LOOP_CLR_FD [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=847, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 849] <... ioctl resumed>) = 0 [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 849] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 849] close(4) = 0 [pid 849] close(3 [pid 850] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 850] close(4) = 0 [pid 850] close(3 [pid 849] <... close resumed>) = 0 [pid 849] chdir("./file0") = 0 [pid 849] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 297] <... restart_syscall resumed>) = 0 [pid 849] <... open resumed>) = 3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 849] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 297] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 849] <... mount resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 849] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] close(3) = 0 [pid 849] <... open resumed>) = 4 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 849] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 852 [pid 849] <... mmap resumed>) = 0x20000000 [pid 849] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 849] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 849] exit_group(0) = ? [pid 851] <... write resumed>) = 1048576 [pid 849] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=849, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 851] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 853 [pid 851] <... munmap resumed>) = 0 [pid 850] <... close resumed>) = 0 [pid 851] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 851] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 851] ioctl(4, LOOP_CLR_FD) = 0 [pid 850] chdir("./file0") = 0 [pid 850] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 851] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 851] close(4) = 0 [pid 851] close(3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 854 attached ./strace-static-x86_64: Process 852 attached [pid 854] set_robust_list(0x55555671f660, 24 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 854 [pid 854] <... set_robust_list resumed>) = 0 [pid 852] set_robust_list(0x55555671f660, 24 [pid 854] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 852] <... set_robust_list resumed>) = 0 [pid 854] <... prctl resumed>) = 0 [pid 854] setpgid(0, 0 [pid 852] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 854] <... setpgid resumed>) = 0 [pid 852] <... prctl resumed>) = 0 [pid 854] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 852] setpgid(0, 0 [pid 854] <... openat resumed>) = 3 [pid 852] <... setpgid resumed>) = 0 [pid 854] write(3, "1000", 4) = 4 [pid 852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 854] close(3executing program [pid 852] <... openat resumed>) = 3 [pid 854] <... close resumed>) = 0 [pid 852] write(3, "1000", 4 [pid 854] write(1, "executing program\n", 18 [pid 852] <... write resumed>) = 4 [pid 854] <... write resumed>) = 18 [pid 852] close(3 [pid 854] memfd_create("syzkaller", 0 [pid 852] <... close resumed>) = 0 executing program [pid 854] <... memfd_create resumed>) = 3 [pid 852] write(1, "executing program\n", 18 [pid 854] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 852] <... write resumed>) = 18 [pid 854] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 852] memfd_create("syzkaller", 0 [pid 850] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 850] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 850] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 853 attached [pid 853] set_robust_list(0x55555671f660, 24) = 0 [pid 852] <... memfd_create resumed>) = 3 [pid 852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 853] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 850] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 853] <... prctl resumed>) = 0 [pid 853] setpgid(0, 0) = 0 [pid 853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 850] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 850] exit_group(0) = ? [pid 853] <... openat resumed>) = 3 [pid 853] write(3, "1000", 4 [pid 851] <... close resumed>) = 0 [pid 853] <... write resumed>) = 4 [pid 853] close(3) = 0 [pid 853] write(1, "executing program\n", 18executing program ) = 18 [pid 853] memfd_create("syzkaller", 0 [pid 850] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=850, si_uid=0, si_status=0, si_utime=0, si_stime=2} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 853] <... memfd_create resumed>) = 3 [pid 853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 852] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 851] chdir("./file0") = 0 [pid 851] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 851] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 851] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 851] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 855 [pid 851] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 851] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 851] exit_group(0) = ? [pid 851] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=851, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 856 attached , child_tidptr=0x55555671f650) = 856 ./strace-static-x86_64: Process 855 attached [pid 855] set_robust_list(0x55555671f660, 24) = 0 [pid 855] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 853] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 852] <... write resumed>) = 1048576 [pid 855] <... prctl resumed>) = 0 [pid 855] setpgid(0, 0) = 0 [pid 855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 855] write(3, "1000", 4) = 4 [pid 854] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 856] set_robust_list(0x55555671f660, 24 [pid 852] munmap(0x7f1ddd1fa000, 138412032 [pid 855] close(3) = 0 [pid 855] write(1, "executing program\n", 18executing program ) = 18 [pid 855] memfd_create("syzkaller", 0) = 3 [pid 855] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 854] <... write resumed>) = 1048576 [pid 856] <... set_robust_list resumed>) = 0 [pid 852] <... munmap resumed>) = 0 [pid 856] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 852] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 854] munmap(0x7f1ddd1fa000, 138412032 [pid 856] <... prctl resumed>) = 0 [pid 852] <... openat resumed>) = 4 [pid 856] setpgid(0, 0 [pid 852] ioctl(4, LOOP_SET_FD, 3 [pid 854] <... munmap resumed>) = 0 [pid 856] <... setpgid resumed>) = 0 [pid 854] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 852] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 856] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 852] ioctl(4, LOOP_CLR_FD [pid 854] <... openat resumed>) = 4 [pid 852] <... ioctl resumed>) = 0 executing program [pid 856] <... openat resumed>) = 3 [pid 856] write(3, "1000", 4 [pid 854] ioctl(4, LOOP_SET_FD, 3 [pid 856] <... write resumed>) = 4 [pid 854] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 856] close(3 [pid 854] ioctl(4, LOOP_CLR_FD [pid 856] <... close resumed>) = 0 [pid 854] <... ioctl resumed>) = 0 [pid 856] write(1, "executing program\n", 18) = 18 [pid 856] memfd_create("syzkaller", 0) = 3 [pid 856] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 856] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 854] ioctl(4, LOOP_SET_FD, 3 [pid 852] ioctl(4, LOOP_SET_FD, 3 [pid 854] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 852] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 854] close(4 [pid 852] close(4 [pid 854] <... close resumed>) = 0 [pid 852] <... close resumed>) = 0 [pid 854] close(3 [pid 852] close(3 [pid 854] <... close resumed>) = 0 [pid 853] <... write resumed>) = 1048576 [pid 853] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 855] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 853] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 853] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 853] ioctl(4, LOOP_CLR_FD) = 0 [pid 852] <... close resumed>) = 0 [pid 852] chdir("./file0" [pid 854] chdir("./file0" [pid 852] <... chdir resumed>) = 0 [pid 854] <... chdir resumed>) = 0 [pid 852] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 854] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 852] <... open resumed>) = 3 [pid 854] <... open resumed>) = 3 [pid 852] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 854] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 852] <... mount resumed>) = 0 [pid 854] <... mount resumed>) = 0 [pid 852] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 854] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 852] <... open resumed>) = 4 [pid 854] <... open resumed>) = 4 [pid 852] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 854] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 853] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 853] close(4) = 0 [pid 853] close(3 [pid 852] <... mmap resumed>) = 0x20000000 [pid 854] <... mmap resumed>) = 0x20000000 [pid 852] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 854] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 852] <... openat resumed>) = 5 [pid 854] <... openat resumed>) = 5 [pid 852] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 854] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 852] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 854] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 852] exit_group(0 [pid 854] exit_group(0 [pid 852] <... exit_group resumed>) = ? [pid 854] <... exit_group resumed>) = ? [pid 852] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=852, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 854] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=854, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 855] <... write resumed>) = 1048576 [pid 853] <... close resumed>) = 0 [pid 853] chdir("./file0") = 0 [pid 853] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 853] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 297] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 295] close(3 [pid 297] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 858 attached [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 858 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 859 [pid 853] <... mount resumed>) = 0 [pid 853] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 853] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 853] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 856] <... write resumed>) = 1048576 [pid 858] set_robust_list(0x55555671f660, 24 [pid 856] munmap(0x7f1ddd1fa000, 138412032 [pid 858] <... set_robust_list resumed>) = 0 [pid 856] <... munmap resumed>) = 0 [pid 858] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 856] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 858] <... prctl resumed>) = 0 [pid 858] setpgid(0, 0 [pid 856] <... openat resumed>) = 4 [pid 858] <... setpgid resumed>) = 0 [pid 856] ioctl(4, LOOP_SET_FD, 3 [pid 853] <... openat resumed>) = 5 [pid 858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 856] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 858] <... openat resumed>) = 3 [pid 856] ioctl(4, LOOP_CLR_FD [pid 858] write(3, "1000", 4 [pid 856] <... ioctl resumed>) = 0 [pid 858] <... write resumed>) = 4 executing program [pid 858] close(3) = 0 [pid 858] write(1, "executing program\n", 18) = 18 [pid 858] memfd_create("syzkaller", 0) = 3 [pid 855] munmap(0x7f1ddd1fa000, 138412032 [pid 858] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 853] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 855] <... munmap resumed>) = 0 [pid 853] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 853] exit_group(0) = ? [pid 855] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 855] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 855] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 859 attached [pid 859] set_robust_list(0x55555671f660, 24) = 0 [pid 859] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 859] setpgid(0, 0) = 0 [pid 855] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 855] close(4) = 0 [pid 855] close(3 [pid 858] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 856] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 856] close(4) = 0 [pid 856] close(3 [pid 859] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 859] write(3, "1000", 4) = 4 [pid 853] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=853, si_uid=0, si_status=0, si_utime=1, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 859] close(3) = 0 [pid 859] write(1, "executing program\n", 18executing program ) = 18 [pid 859] memfd_create("syzkaller", 0 [pid 856] <... close resumed>) = 0 [pid 856] chdir("./file0") = 0 [pid 856] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 859] <... memfd_create resumed>) = 3 [pid 859] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 856] <... open resumed>) = 3 [pid 859] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 855] <... close resumed>) = 0 [pid 858] <... write resumed>) = 1048576 [pid 856] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 855] chdir("./file0") = 0 [pid 855] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 855] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 856] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 858] munmap(0x7f1ddd1fa000, 138412032 [pid 856] <... open resumed>) = 4 [pid 299] <... openat resumed>) = 3 [pid 856] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 860 [pid 856] <... mmap resumed>) = 0x20000000 [pid 856] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 856] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 858] <... munmap resumed>) = 0 [pid 856] exit_group(0 [pid 858] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 856] <... exit_group resumed>) = ? [pid 855] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 855] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 856] +++ exited with 0 +++ [pid 858] <... openat resumed>) = 4 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=856, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 858] ioctl(4, LOOP_SET_FD, 3 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 858] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 858] ioctl(4, LOOP_CLR_FD) = 0 [pid 858] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 858] close(4) = 0 [pid 858] close(3 [pid 855] <... mmap resumed>) = 0x20000000 [pid 855] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 855] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 855] exit_group(0) = ? [pid 858] <... close resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 861 attached [pid 858] chdir("./file0") = 0 [pid 861] set_robust_list(0x55555671f660, 24 [pid 858] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 861 [pid 861] <... set_robust_list resumed>) = 0 [pid 855] +++ exited with 0 +++ [pid 858] <... open resumed>) = 3 [pid 858] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=855, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 861] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 861] <... prctl resumed>) = 0 [pid 858] <... mount resumed>) = 0 [pid 861] setpgid(0, 0 [pid 858] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 860 attached ) = 4 [pid 861] <... setpgid resumed>) = 0 [pid 858] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 860] set_robust_list(0x55555671f660, 24) = 0 [pid 858] <... mmap resumed>) = 0x20000000 [pid 861] <... openat resumed>) = 3 [pid 858] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 861] write(3, "1000", 4 [pid 860] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 858] <... openat resumed>) = 5 [pid 861] <... write resumed>) = 4 [pid 858] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 861] close(3 [pid 858] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 861] <... close resumed>) = 0 executing program [pid 861] write(1, "executing program\n", 18 [pid 858] exit_group(0 [pid 861] <... write resumed>) = 18 [pid 858] <... exit_group resumed>) = ? [pid 860] <... prctl resumed>) = 0 [pid 860] setpgid(0, 0 [pid 861] memfd_create("syzkaller", 0 [pid 860] <... setpgid resumed>) = 0 [pid 860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 860] write(3, "1000", 4) = 4 [pid 860] close(3 [pid 858] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=858, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 861] <... memfd_create resumed>) = 3 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 861] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 860] <... close resumed>) = 0 [pid 861] <... mmap resumed>) = 0x7f1ddd1fa000 executing program [pid 860] write(1, "executing program\n", 18) = 18 [pid 860] memfd_create("syzkaller", 0) = 3 [pid 860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 861] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 862 [pid 859] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 863 [pid 859] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 863 attached [pid 863] set_robust_list(0x55555671f660, 24) = 0 [pid 863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 863] setpgid(0, 0) = 0 [pid 863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 863] write(3, "1000", 4) = 4 [pid 863] close(3) = 0 [pid 863] write(1, "executing program\n", 18executing program ) = 18 [pid 863] memfd_create("syzkaller", 0) = 3 [pid 863] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 859] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 859] openat(AT_FDCWD, "/dev/loop0", O_RDWR./strace-static-x86_64: Process 862 attached ) = 4 [pid 860] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 859] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 859] ioctl(4, LOOP_CLR_FD) = 0 [pid 861] <... write resumed>) = 1048576 [pid 862] set_robust_list(0x55555671f660, 24 [pid 861] munmap(0x7f1ddd1fa000, 138412032 [pid 862] <... set_robust_list resumed>) = 0 [pid 859] ioctl(4, LOOP_SET_FD, 3 [pid 861] <... munmap resumed>) = 0 [pid 862] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 861] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 862] <... prctl resumed>) = 0 [pid 861] <... openat resumed>) = 4 [pid 862] setpgid(0, 0 [pid 861] ioctl(4, LOOP_SET_FD, 3 [pid 862] <... setpgid resumed>) = 0 [pid 861] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 862] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 861] ioctl(4, LOOP_CLR_FD [pid 862] <... openat resumed>) = 3 [pid 861] <... ioctl resumed>) = 0 [pid 862] write(3, "1000", 4) = 4 [pid 862] close(3executing program ) = 0 [pid 862] write(1, "executing program\n", 18) = 18 [pid 862] memfd_create("syzkaller", 0) = 3 [pid 862] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 859] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 859] close(4) = 0 [pid 859] close(3 [pid 860] <... write resumed>) = 1048576 [pid 862] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 861] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 861] close(4) = 0 [pid 861] close(3 [pid 859] <... close resumed>) = 0 [pid 861] <... close resumed>) = 0 [pid 861] chdir("./file0") = 0 [pid 861] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 859] chdir("./file0") = 0 [pid 859] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 861] <... open resumed>) = 3 [pid 861] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 861] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 861] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 859] <... open resumed>) = 3 [pid 861] <... mmap resumed>) = 0x20000000 [pid 859] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 859] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 859] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 863] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 859] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 859] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 859] exit_group(0 [pid 860] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 859] <... exit_group resumed>) = ? [pid 859] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=859, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 861] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 864 [pid 861] <... openat resumed>) = 5 [pid 861] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 861] exit_group(0) = ? [pid 860] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 860] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 860] ioctl(4, LOOP_CLR_FD) = 0 [pid 861] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=861, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 862] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 864 attached [pid 862] munmap(0x7f1ddd1fa000, 138412032 [pid 864] set_robust_list(0x55555671f660, 24 [pid 860] ioctl(4, LOOP_SET_FD, 3 [pid 864] <... set_robust_list resumed>) = 0 [pid 862] <... munmap resumed>) = 0 [pid 864] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 862] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 864] <... prctl resumed>) = 0 [pid 862] <... openat resumed>) = 4 [pid 864] setpgid(0, 0 [pid 862] ioctl(4, LOOP_SET_FD, 3 [pid 864] <... setpgid resumed>) = 0 [pid 862] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 862] ioctl(4, LOOP_CLR_FD [pid 860] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) executing program [pid 864] <... openat resumed>) = 3 [pid 862] <... ioctl resumed>) = 0 [pid 864] write(3, "1000", 4) = 4 [pid 864] close(3 [pid 860] close(4 [pid 864] <... close resumed>) = 0 [pid 860] <... close resumed>) = 0 [pid 864] write(1, "executing program\n", 18) = 18 [pid 860] close(3 [pid 864] memfd_create("syzkaller", 0 [pid 860] <... close resumed>) = 0 [pid 864] <... memfd_create resumed>) = 3 [pid 862] ioctl(4, LOOP_SET_FD, 3 [pid 864] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 862] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 864] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 862] close(4 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 865 [pid 863] <... write resumed>) = 1048576 [pid 860] chdir("./file0") = 0 [pid 860] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 860] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 860] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 864] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 862] <... close resumed>) = 0 [pid 862] close(3 [pid 860] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 865 attached [pid 865] set_robust_list(0x55555671f660, 24) = 0 [pid 865] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 865] setpgid(0, 0) = 0 [pid 865] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 863] munmap(0x7f1ddd1fa000, 138412032 [pid 862] <... close resumed>) = 0 [pid 862] chdir("./file0") = 0 [pid 862] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 863] <... munmap resumed>) = 0 [pid 862] <... open resumed>) = 3 [pid 862] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 865] <... openat resumed>) = 3 [pid 862] <... mount resumed>) = 0 [pid 862] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 862] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 865] write(3, "1000", 4) = 4 [pid 865] close(3) = 0 [pid 863] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 862] <... mmap resumed>) = 0x20000000 executing program [pid 865] write(1, "executing program\n", 18 [pid 863] <... openat resumed>) = 4 [pid 865] <... write resumed>) = 18 [pid 865] memfd_create("syzkaller", 0 [pid 863] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 863] ioctl(4, LOOP_CLR_FD) = 0 [pid 865] <... memfd_create resumed>) = 3 [pid 865] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 860] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 864] <... write resumed>) = 1048576 [pid 862] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 863] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 863] close(4) = 0 [pid 863] close(3) = 0 [pid 860] <... openat resumed>) = 5 [pid 860] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 860] exit_group(0) = ? [pid 860] +++ exited with 0 +++ [pid 862] <... openat resumed>) = 5 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=860, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 864] munmap(0x7f1ddd1fa000, 138412032 [pid 862] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 862] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 862] exit_group(0) = ? [pid 862] +++ exited with 0 +++ [pid 864] <... munmap resumed>) = 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 864] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=862, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 864] <... openat resumed>) = 4 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 864] ioctl(4, LOOP_SET_FD, 3 [pid 299] <... openat resumed>) = 3 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 864] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] <... openat resumed>) = 3 [pid 864] ioctl(4, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 864] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 298] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] <... close resumed>) = 0 [pid 863] chdir("./file0") = 0 [pid 863] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 866 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 867 [pid 864] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 863] <... open resumed>) = 3 [pid 865] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 863] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 863] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 863] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 863] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 864] close(4./strace-static-x86_64: Process 867 attached ./strace-static-x86_64: Process 866 attached [pid 865] <... write resumed>) = 1048576 [pid 864] <... close resumed>) = 0 [pid 867] set_robust_list(0x55555671f660, 24 [pid 863] <... openat resumed>) = 5 [pid 867] <... set_robust_list resumed>) = 0 [pid 866] set_robust_list(0x55555671f660, 24 [pid 864] close(3 [pid 867] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 866] <... set_robust_list resumed>) = 0 [pid 863] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 863] exit_group(0) = ? [pid 863] +++ exited with 0 +++ [pid 864] <... close resumed>) = 0 [pid 867] <... prctl resumed>) = 0 [pid 866] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 864] chdir("./file0" [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=863, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 867] setpgid(0, 0 [pid 866] <... prctl resumed>) = 0 [pid 867] <... setpgid resumed>) = 0 [pid 867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 866] setpgid(0, 0 [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 864] <... chdir resumed>) = 0 [pid 867] <... openat resumed>) = 3 [pid 866] <... setpgid resumed>) = 0 [pid 864] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 867] write(3, "1000", 4) = 4 [pid 866] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 865] munmap(0x7f1ddd1fa000, 138412032 [pid 867] close(3 [pid 866] <... openat resumed>) = 3 [pid 867] <... close resumed>) = 0 [pid 866] write(3, "1000", 4 [pid 867] write(1, "executing program\n", 18executing program ) = 18 [pid 866] <... write resumed>) = 4 [pid 867] memfd_create("syzkaller", 0 [pid 866] close(3 [pid 867] <... memfd_create resumed>) = 3 [pid 866] <... close resumed>) = 0 [pid 867] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 866] write(1, "executing program\n", 18executing program [pid 867] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 866] <... write resumed>) = 18 [pid 864] <... open resumed>) = 3 [pid 865] <... munmap resumed>) = 0 [pid 865] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 865] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 865] ioctl(4, LOOP_CLR_FD) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 867] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 297] <... openat resumed>) = 3 [pid 866] memfd_create("syzkaller", 0 [pid 864] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 866] <... memfd_create resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 866] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 864] <... mount resumed>) = 0 [pid 866] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 864] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] <... ioctl resumed>) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 868 [pid 865] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 865] close(4) = 0 [pid 865] close(3 [pid 864] <... open resumed>) = 4 [pid 865] <... close resumed>) = 0 [pid 865] chdir("./file0") = 0 [pid 865] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 865] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 865] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 865] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 866] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 864] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 864] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 864] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 864] exit_group(0) = ? [pid 865] <... mmap resumed>) = 0x20000000 [pid 865] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 864] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=864, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 865] <... openat resumed>) = 5 [pid 865] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 865] exit_group(0) = ? [pid 865] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=865, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 867] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 868 attached [pid 868] set_robust_list(0x55555671f660, 24 [pid 867] munmap(0x7f1ddd1fa000, 138412032 [pid 866] <... write resumed>) = 1048576 [pid 868] <... set_robust_list resumed>) = 0 [pid 868] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 868] setpgid(0, 0) = 0 [pid 868] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 868] write(3, "1000", 4) = 4 [pid 868] close(3) = 0 [pid 868] write(1, "executing program\n", 18 [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 296] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 295] close(3 [pid 296] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 870 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 869 executing program [pid 868] <... write resumed>) = 18 [pid 868] memfd_create("syzkaller", 0) = 3 [pid 868] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 867] <... munmap resumed>) = 0 [pid 866] munmap(0x7f1ddd1fa000, 138412032 [pid 867] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 866] <... munmap resumed>) = 0 [pid 867] <... openat resumed>) = 4 [pid 866] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 867] ioctl(4, LOOP_SET_FD, 3 [pid 866] <... openat resumed>) = 4 [pid 867] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 866] ioctl(4, LOOP_SET_FD, 3 [pid 867] ioctl(4, LOOP_CLR_FD [pid 866] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 867] <... ioctl resumed>) = 0 [pid 866] ioctl(4, LOOP_CLR_FD) = 0 [pid 867] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 867] close(4 [pid 866] ioctl(4, LOOP_SET_FD, 3 [pid 867] <... close resumed>) = 0 [pid 866] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 867] close(3 [pid 866] close(4 [pid 867] <... close resumed>) = 0 [pid 866] <... close resumed>) = 0 [pid 867] chdir("./file0" [pid 866] close(3 [pid 867] <... chdir resumed>) = 0 ./strace-static-x86_64: Process 870 attached [pid 870] set_robust_list(0x55555671f660, 24) = 0 [pid 870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 870] setpgid(0, 0) = 0 [pid 870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 870] write(3, "1000", 4) = 4 [pid 870] close(3) = 0 [pid 870] write(1, "executing program\n", 18executing program ) = 18 [pid 867] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 866] <... close resumed>) = 0 [pid 870] memfd_create("syzkaller", 0) = 3 [pid 870] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 867] <... open resumed>) = 3 [pid 866] chdir("./file0" [pid 867] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 866] <... chdir resumed>) = 0 [pid 867] <... mount resumed>) = 0 [pid 866] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 867] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 869 attached [pid 870] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 866] <... open resumed>) = 3 [pid 867] <... open resumed>) = 4 [pid 866] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 867] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 866] <... mount resumed>) = 0 [pid 869] set_robust_list(0x55555671f660, 24 [pid 867] <... mmap resumed>) = 0x20000000 [pid 866] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 867] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 866] <... open resumed>) = 4 [pid 867] <... openat resumed>) = 5 [pid 866] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 867] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 869] <... set_robust_list resumed>) = 0 [pid 869] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 869] setpgid(0, 0 [pid 867] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 866] <... mmap resumed>) = 0x20000000 [pid 867] exit_group(0 [pid 866] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 867] <... exit_group resumed>) = ? [pid 866] <... openat resumed>) = 5 [pid 869] <... setpgid resumed>) = 0 [pid 867] +++ exited with 0 +++ [pid 866] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=867, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 866] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 866] exit_group(0) = ? [pid 869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 869] write(3, "1000", 4) = 4 [pid 869] close(3) = 0 [pid 866] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=866, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>executing program [pid 869] write(1, "executing program\n", 18) = 18 [pid 869] memfd_create("syzkaller", 0) = 3 [pid 869] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 871 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 872 [pid 868] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 871 attached ./strace-static-x86_64: Process 872 attached [pid 872] set_robust_list(0x55555671f660, 24 [pid 871] set_robust_list(0x55555671f660, 24 [pid 872] <... set_robust_list resumed>) = 0 [pid 871] <... set_robust_list resumed>) = 0 [pid 872] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 871] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 872] setpgid(0, 0 [pid 871] <... prctl resumed>) = 0 [pid 872] <... setpgid resumed>) = 0 [pid 871] setpgid(0, 0 [pid 872] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 871] <... setpgid resumed>) = 0 [pid 872] <... openat resumed>) = 3 [pid 871] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 872] write(3, "1000", 4 [pid 871] <... openat resumed>) = 3 [pid 872] <... write resumed>) = 4 [pid 871] write(3, "1000", 4executing program [pid 872] close(3 [pid 871] <... write resumed>) = 4 [pid 872] <... close resumed>) = 0 [pid 871] close(3 [pid 872] write(1, "executing program\n", 18 [pid 871] <... close resumed>) = 0 [pid 872] <... write resumed>) = 18 [pid 871] write(1, "executing program\n", 18executing program [pid 872] memfd_create("syzkaller", 0 [pid 871] <... write resumed>) = 18 [pid 872] <... memfd_create resumed>) = 3 [pid 872] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 871] memfd_create("syzkaller", 0 [pid 872] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 871] <... memfd_create resumed>) = 3 [pid 871] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 870] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 868] <... write resumed>) = 1048576 [pid 869] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 871] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 868] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 868] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 868] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 868] ioctl(4, LOOP_CLR_FD) = 0 [pid 869] <... write resumed>) = 1048576 [pid 868] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 868] close(4) = 0 [pid 868] close(3) = 0 [pid 870] <... write resumed>) = 1048576 [pid 868] chdir("./file0") = 0 [pid 868] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 870] munmap(0x7f1ddd1fa000, 138412032 [pid 868] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 870] <... munmap resumed>) = 0 [pid 868] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 870] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 870] ioctl(4, LOOP_SET_FD, 3 [pid 868] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 870] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 871] <... write resumed>) = 1048576 [pid 870] ioctl(4, LOOP_CLR_FD [pid 872] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 871] munmap(0x7f1ddd1fa000, 138412032 [pid 869] munmap(0x7f1ddd1fa000, 138412032 [pid 870] <... ioctl resumed>) = 0 [pid 868] <... mmap resumed>) = 0x20000000 [pid 868] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 868] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 868] exit_group(0) = ? [pid 870] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 870] close(4) = 0 [pid 870] close(3 [pid 872] <... write resumed>) = 1048576 [pid 871] <... munmap resumed>) = 0 [pid 869] <... munmap resumed>) = 0 [pid 872] munmap(0x7f1ddd1fa000, 138412032 [pid 871] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 869] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 871] <... openat resumed>) = 4 [pid 869] <... openat resumed>) = 4 [pid 871] ioctl(4, LOOP_SET_FD, 3 [pid 869] ioctl(4, LOOP_SET_FD, 3 [pid 871] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 872] <... munmap resumed>) = 0 [pid 871] ioctl(4, LOOP_CLR_FD [pid 869] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 872] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 871] <... ioctl resumed>) = 0 [pid 869] ioctl(4, LOOP_CLR_FD) = 0 [pid 872] <... openat resumed>) = 4 [pid 872] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 872] ioctl(4, LOOP_CLR_FD) = 0 [pid 871] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 871] close(4 [pid 869] ioctl(4, LOOP_SET_FD, 3 [pid 871] <... close resumed>) = 0 [pid 869] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 871] close(3 [pid 869] close(4 [pid 868] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=868, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 871] <... close resumed>) = 0 [pid 869] <... close resumed>) = 0 [pid 872] ioctl(4, LOOP_SET_FD, 3 [pid 871] chdir("./file0" [pid 869] close(3 [pid 872] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 870] <... close resumed>) = 0 [pid 870] chdir("./file0") = 0 [pid 870] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 870] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 870] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 869] <... close resumed>) = 0 [pid 872] close(4 [pid 871] <... chdir resumed>) = 0 [pid 869] chdir("./file0" [pid 872] <... close resumed>) = 0 [pid 871] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 869] <... chdir resumed>) = 0 [pid 872] close(3 [pid 870] <... open resumed>) = 4 [pid 870] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 871] <... open resumed>) = 3 [pid 869] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 870] <... mmap resumed>) = 0x20000000 [pid 870] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 870] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 870] exit_group(0) = ? [pid 872] <... close resumed>) = 0 [pid 869] <... open resumed>) = 3 [pid 872] chdir("./file0" [pid 871] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 869] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 871] <... mount resumed>) = 0 [pid 869] <... mount resumed>) = 0 [pid 872] <... chdir resumed>) = 0 [pid 871] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 872] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 870] +++ exited with 0 +++ [pid 869] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] <... restart_syscall resumed>) = 0 [pid 871] <... open resumed>) = 4 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=870, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 872] <... open resumed>) = 3 [pid 869] <... open resumed>) = 4 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 872] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 871] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 869] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 872] <... mount resumed>) = 0 [pid 297] <... openat resumed>) = 3 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 297] ioctl(3, LOOP_CLR_FD [pid 296] <... openat resumed>) = 3 [pid 297] <... ioctl resumed>) = 0 [pid 296] ioctl(3, LOOP_CLR_FD [pid 297] close(3 [pid 296] <... ioctl resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 296] close(3 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... close resumed>) = 0 [pid 869] <... mmap resumed>) = 0x20000000 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 873 [pid 872] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 871] <... mmap resumed>) = 0x20000000 [pid 869] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 874 [pid 872] <... open resumed>) = 4 [pid 871] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 869] <... openat resumed>) = 5 [pid 872] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 871] <... openat resumed>) = 5 ./strace-static-x86_64: Process 874 attached [pid 874] set_robust_list(0x55555671f660, 24) = 0 [pid 874] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 872] <... mmap resumed>) = 0x20000000 [pid 871] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 869] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 872] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 871] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 869] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 872] <... openat resumed>) = 5 [pid 871] exit_group(0 [pid 872] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 869] exit_group(0 [pid 871] <... exit_group resumed>) = ? [pid 872] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 869] <... exit_group resumed>) = ? [pid 874] <... prctl resumed>) = 0 [pid 874] setpgid(0, 0) = 0 [pid 874] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 871] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=871, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 874] write(3, "1000", 4) = 4 [pid 874] close(3) = 0 [pid 874] write(1, "executing program\n", 18executing program ) = 18 [pid 869] +++ exited with 0 +++ [pid 872] exit_group(0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=869, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 872] <... exit_group resumed>) = ? [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 874] memfd_create("syzkaller", 0./strace-static-x86_64: Process 873 attached ) = 3 [pid 873] set_robust_list(0x55555671f660, 24 [pid 872] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=872, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 873] <... set_robust_list resumed>) = 0 [pid 874] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 873] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 874] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 873] <... prctl resumed>) = 0 [pid 873] setpgid(0, 0) = 0 [pid 873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 299] <... restart_syscall resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 298] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 298] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 298] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 298] close(3 [pid 295] close(3 [pid 299] <... close resumed>) = 0 [pid 298] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 876 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 877 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 875 [pid 873] write(3, "1000", 4) = 4 [pid 873] close(3) = 0 [pid 873] write(1, "executing program\n", 18executing program ) = 18 [pid 873] memfd_create("syzkaller", 0) = 3 [pid 873] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 876 attached ./strace-static-x86_64: Process 875 attached [pid 876] set_robust_list(0x55555671f660, 24 [pid 875] set_robust_list(0x55555671f660, 24 [pid 876] <... set_robust_list resumed>) = 0 [pid 875] <... set_robust_list resumed>) = 0 [pid 876] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 875] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 876] setpgid(0, 0 [pid 875] <... prctl resumed>) = 0 [pid 876] <... setpgid resumed>) = 0 [pid 875] setpgid(0, 0 [pid 876] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 875] <... setpgid resumed>) = 0 [pid 876] <... openat resumed>) = 3 [pid 875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 876] write(3, "1000", 4) = 4 [pid 875] <... openat resumed>) = 3 [pid 876] close(3 [pid 875] write(3, "1000", 4 [pid 876] <... close resumed>) = 0 [pid 875] <... write resumed>) = 4 executing program [pid 876] write(1, "executing program\n", 18 [pid 875] close(3 [pid 876] <... write resumed>) = 18 [pid 875] <... close resumed>) = 0 executing program [pid 876] memfd_create("syzkaller", 0 [pid 875] write(1, "executing program\n", 18 [pid 876] <... memfd_create resumed>) = 3 [pid 875] <... write resumed>) = 18 [pid 876] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 875] memfd_create("syzkaller", 0./strace-static-x86_64: Process 877 attached [pid 876] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 875] <... memfd_create resumed>) = 3 [pid 875] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 877] set_robust_list(0x55555671f660, 24) = 0 [pid 877] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 877] setpgid(0, 0) = 0 [pid 877] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 877] write(3, "1000", 4) = 4 [pid 877] close(3) = 0 [pid 877] write(1, "executing program\n", 18executing program ) = 18 [pid 877] memfd_create("syzkaller", 0) = 3 [pid 877] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 875] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 874] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 873] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 877] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 874] <... write resumed>) = 1048576 [pid 875] <... write resumed>) = 1048576 [pid 873] <... write resumed>) = 1048576 [pid 874] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 876] <... write resumed>) = 1048576 [pid 875] munmap(0x7f1ddd1fa000, 138412032 [pid 876] munmap(0x7f1ddd1fa000, 138412032 [pid 875] <... munmap resumed>) = 0 [pid 876] <... munmap resumed>) = 0 [pid 875] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 876] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 875] <... openat resumed>) = 4 [pid 876] <... openat resumed>) = 4 [pid 875] ioctl(4, LOOP_SET_FD, 3 [pid 876] ioctl(4, LOOP_SET_FD, 3 [pid 875] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 876] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 875] ioctl(4, LOOP_CLR_FD [pid 876] ioctl(4, LOOP_CLR_FD [pid 875] <... ioctl resumed>) = 0 [pid 876] <... ioctl resumed>) = 0 [pid 873] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 874] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 874] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 876] ioctl(4, LOOP_SET_FD, 3 [pid 875] ioctl(4, LOOP_SET_FD, 3 [pid 876] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 875] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 876] close(4 [pid 875] close(4 [pid 876] <... close resumed>) = 0 [pid 875] <... close resumed>) = 0 [pid 876] close(3 [pid 875] close(3 [pid 874] ioctl(4, LOOP_CLR_FD) = 0 [pid 873] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 873] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 873] ioctl(4, LOOP_CLR_FD) = 0 [pid 877] <... write resumed>) = 1048576 [pid 874] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 874] close(4 [pid 876] <... close resumed>) = 0 [pid 874] <... close resumed>) = 0 [pid 874] close(3 [pid 875] <... close resumed>) = 0 [pid 876] chdir("./file0" [pid 875] chdir("./file0" [pid 876] <... chdir resumed>) = 0 [pid 875] <... chdir resumed>) = 0 [pid 876] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 875] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 876] <... open resumed>) = 3 [pid 876] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 875] <... open resumed>) = 3 [pid 876] <... mount resumed>) = 0 [pid 875] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 876] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 875] <... mount resumed>) = 0 [pid 876] <... open resumed>) = 4 [pid 875] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 876] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 875] <... open resumed>) = 4 [pid 876] <... mmap resumed>) = 0x20000000 [pid 875] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 877] munmap(0x7f1ddd1fa000, 138412032 [pid 876] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 875] <... mmap resumed>) = 0x20000000 [pid 874] <... close resumed>) = 0 [pid 876] <... openat resumed>) = 5 [pid 875] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 873] ioctl(4, LOOP_SET_FD, 3 [pid 876] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 875] <... openat resumed>) = 5 [pid 873] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 876] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 875] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 876] exit_group(0 [pid 875] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 877] <... munmap resumed>) = 0 [pid 873] close(4 [pid 874] chdir("./file0" [pid 876] <... exit_group resumed>) = ? [pid 875] exit_group(0 [pid 873] <... close resumed>) = 0 [pid 877] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 876] +++ exited with 0 +++ [pid 875] <... exit_group resumed>) = ? [pid 874] <... chdir resumed>) = 0 [pid 873] close(3 [pid 875] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=876, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=875, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 873] <... close resumed>) = 0 [pid 877] <... openat resumed>) = 4 [pid 874] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 873] chdir("./file0" [pid 877] ioctl(4, LOOP_SET_FD, 3 [pid 299] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 877] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 295] close(3 [pid 299] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 878 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 879 [pid 877] ioctl(4, LOOP_CLR_FD) = 0 [pid 874] <... open resumed>) = 3 [pid 873] <... chdir resumed>) = 0 [pid 873] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 874] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 873] <... open resumed>) = 3 [pid 874] <... mount resumed>) = 0 [pid 873] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 877] ioctl(4, LOOP_SET_FD, 3 [pid 874] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 873] <... mount resumed>) = 0 [pid 877] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 874] <... open resumed>) = 4 ./strace-static-x86_64: Process 879 attached [pid 879] set_robust_list(0x55555671f660, 24) = 0 ./strace-static-x86_64: Process 878 attached [pid 877] close(4 [pid 874] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 873] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 879] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 879] setpgid(0, 0) = 0 executing program [pid 877] <... close resumed>) = 0 [pid 879] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 879] write(3, "1000", 4) = 4 [pid 879] close(3) = 0 [pid 879] write(1, "executing program\n", 18) = 18 [pid 874] <... mmap resumed>) = 0x20000000 [pid 879] memfd_create("syzkaller", 0) = 3 [pid 879] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 877] close(3 [pid 873] <... open resumed>) = 4 [pid 877] <... close resumed>) = 0 [pid 873] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 874] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 878] set_robust_list(0x55555671f660, 24 [pid 873] <... mmap resumed>) = 0x20000000 [pid 874] <... openat resumed>) = 5 [pid 873] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 874] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 878] <... set_robust_list resumed>) = 0 [pid 873] <... openat resumed>) = 5 [pid 874] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 878] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 874] exit_group(0 [pid 873] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 878] <... prctl resumed>) = 0 [pid 877] chdir("./file0" [pid 873] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 874] <... exit_group resumed>) = ? [pid 878] setpgid(0, 0 [pid 874] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=874, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 879] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 873] exit_group(0) = ? [pid 878] <... setpgid resumed>) = 0 [pid 877] <... chdir resumed>) = 0 [pid 873] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=873, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 878] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 877] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 878] <... openat resumed>) = 3 [pid 877] <... open resumed>) = 3 [pid 878] write(3, "1000", 4 [pid 877] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 879] <... write resumed>) = 1048576 [pid 879] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 879] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 879] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 879] ioctl(4, LOOP_CLR_FD) = 0 [pid 878] <... write resumed>) = 4 [pid 878] close(3) = 0 [pid 878] write(1, "executing program\n", 18 [pid 297] <... restart_syscall resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 878] <... write resumed>) = 18 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 297] <... openat resumed>) = 3 [pid 296] <... openat resumed>) = 3 [pid 297] ioctl(3, LOOP_CLR_FD [pid 296] ioctl(3, LOOP_CLR_FD [pid 297] <... ioctl resumed>) = 0 [pid 296] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 296] close(3 [pid 297] <... close resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLDexecuting program [pid 878] memfd_create("syzkaller", 0) = 3 [pid 878] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 880 [pid 877] <... mount resumed>) = 0 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 881 ./strace-static-x86_64: Process 880 attached [pid 877] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC./strace-static-x86_64: Process 881 attached [pid 880] set_robust_list(0x55555671f660, 24 [pid 878] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 877] <... open resumed>) = 4 [pid 880] <... set_robust_list resumed>) = 0 [pid 877] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 880] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 879] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 879] close(4) = 0 [pid 879] close(3 [pid 877] <... mmap resumed>) = 0x20000000 [pid 880] <... prctl resumed>) = 0 [pid 877] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 880] setpgid(0, 0 [pid 877] <... openat resumed>) = 5 [pid 880] <... setpgid resumed>) = 0 [pid 877] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 880] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 877] <... mount resumed>) = -1 ENOENT (No such file or directory) executing program [pid 880] <... openat resumed>) = 3 [pid 877] exit_group(0 [pid 880] write(3, "1000", 4 [pid 877] <... exit_group resumed>) = ? [pid 880] <... write resumed>) = 4 [pid 877] +++ exited with 0 +++ [pid 880] close(3) = 0 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=877, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 880] write(1, "executing program\n", 18) = 18 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 880] memfd_create("syzkaller", 0) = 3 [pid 880] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 879] <... close resumed>) = 0 [pid 881] set_robust_list(0x55555671f660, 24) = 0 [pid 881] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 881] setpgid(0, 0) = 0 [pid 881] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 879] chdir("./file0") = 0 [pid 879] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 881] write(3, "1000", 4) = 4 [pid 881] close(3) = 0 [pid 881] write(1, "executing program\n", 18executing program ) = 18 [pid 881] memfd_create("syzkaller", 0 [pid 880] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 881] <... memfd_create resumed>) = 3 [pid 879] <... open resumed>) = 3 [pid 881] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 882 [pid 881] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 880] <... write resumed>) = 1048576 [pid 879] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 879] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 879] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 879] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 879] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 879] exit_group(0) = ? [pid 879] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=879, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 882 attached ) = 0 [pid 882] set_robust_list(0x55555671f660, 24 [pid 880] munmap(0x7f1ddd1fa000, 138412032 [pid 882] <... set_robust_list resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3 [pid 882] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 295] <... close resumed>) = 0 [pid 882] <... prctl resumed>) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 883 [pid 882] setpgid(0, 0) = 0 [pid 880] <... munmap resumed>) = 0 [pid 882] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 880] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 881] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 882] <... openat resumed>) = 3 [pid 880] <... openat resumed>) = 4 [pid 882] write(3, "1000", 4./strace-static-x86_64: Process 883 attached ) = 4 [pid 880] ioctl(4, LOOP_SET_FD, 3 [pid 882] close(3 [pid 880] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 883] set_robust_list(0x55555671f660, 24 [pid 882] <... close resumed>) = 0 [pid 880] ioctl(4, LOOP_CLR_FD [pid 883] <... set_robust_list resumed>) = 0 [pid 882] write(1, "executing program\n", 18 [pid 880] <... ioctl resumed>) = 0 [pid 882] <... write resumed>) = 18 executing program [pid 882] memfd_create("syzkaller", 0) = 3 [pid 882] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 883] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 882] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 883] <... prctl resumed>) = 0 [pid 878] <... write resumed>) = 1048576 [pid 880] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 880] close(4) = 0 [pid 883] setpgid(0, 0 [pid 880] close(3 [pid 878] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 878] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 878] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 878] ioctl(4, LOOP_CLR_FD) = 0 [pid 883] <... setpgid resumed>) = 0 [pid 880] <... close resumed>) = 0 [pid 881] <... write resumed>) = 1048576 [pid 882] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 880] chdir("./file0" [pid 883] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 880] <... chdir resumed>) = 0 [pid 880] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 883] <... openat resumed>) = 3 [pid 878] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 880] <... open resumed>) = 3 [pid 883] write(3, "1000", 4 [pid 878] close(4) = 0 [pid 878] close(3 [pid 880] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 883] <... write resumed>) = 4 [pid 883] close(3executing program ) = 0 [pid 880] <... mount resumed>) = 0 [pid 883] write(1, "executing program\n", 18 [pid 880] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 883] <... write resumed>) = 18 [pid 880] <... open resumed>) = 4 [pid 883] memfd_create("syzkaller", 0) = 3 [pid 880] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 883] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 880] <... mmap resumed>) = 0x20000000 [pid 878] <... close resumed>) = 0 [pid 881] munmap(0x7f1ddd1fa000, 138412032 [pid 880] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 881] <... munmap resumed>) = 0 [pid 878] chdir("./file0") = 0 [pid 878] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 881] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 881] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 881] ioctl(4, LOOP_CLR_FD) = 0 [pid 878] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 878] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 880] <... openat resumed>) = 5 [pid 881] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 881] close(4) = 0 [pid 881] close(3 [pid 880] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 880] exit_group(0) = ? [pid 878] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 880] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=880, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 878] <... mmap resumed>) = 0x20000000 [pid 878] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 878] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 883] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 878] exit_group(0) = ? [pid 878] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=878, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 882] <... write resumed>) = 1048576 [pid 881] <... close resumed>) = 0 [pid 881] chdir("./file0") = 0 [pid 881] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 882] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 881] <... open resumed>) = 3 [pid 881] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 881] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 881] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 881] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 882] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 881] <... openat resumed>) = 5 [pid 881] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 884 [pid 881] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 881] exit_group(0 [pid 883] <... write resumed>) = 1048576 [pid 882] ioctl(4, LOOP_SET_FD, 3 [pid 883] munmap(0x7f1ddd1fa000, 138412032 [pid 882] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] <... restart_syscall resumed>) = 0 [pid 882] ioctl(4, LOOP_CLR_FD) = 0 [pid 881] <... exit_group resumed>) = ? [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 883] <... munmap resumed>) = 0 [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 883] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 299] <... ioctl resumed>) = 0 [pid 883] <... openat resumed>) = 4 [pid 299] close(3 [pid 883] ioctl(4, LOOP_SET_FD, 3 [pid 299] <... close resumed>) = 0 [pid 883] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 883] ioctl(4, LOOP_CLR_FD [pid 882] ioctl(4, LOOP_SET_FD, 3 [pid 883] <... ioctl resumed>) = 0 [pid 882] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 885 [pid 882] close(4) = 0 [pid 882] close(3 [pid 881] +++ exited with 0 +++ ./strace-static-x86_64: Process 884 attached [pid 884] set_robust_list(0x55555671f660, 24) = 0 [pid 884] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 884] setpgid(0, 0) = 0 [pid 882] <... close resumed>) = 0 [pid 883] ioctl(4, LOOP_SET_FD, 3 [pid 882] chdir("./file0" [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=881, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 882] <... chdir resumed>) = 0 [pid 883] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 882] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 884] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 882] <... open resumed>) = 3 [pid 883] close(4 [pid 882] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 884] <... openat resumed>) = 3 [pid 882] <... mount resumed>) = 0 [pid 883] <... close resumed>) = 0 [pid 882] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 884] write(3, "1000", 4 [pid 883] close(3 [pid 882] <... open resumed>) = 4 [pid 882] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 884] <... write resumed>) = 4 [pid 884] close(3) = 0 [pid 884] write(1, "executing program\n", 18executing program ) = 18 [pid 296] <... restart_syscall resumed>) = 0 [pid 884] memfd_create("syzkaller", 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 882] <... mmap resumed>) = 0x20000000 [pid 296] ioctl(3, LOOP_CLR_FD [pid 882] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 296] <... ioctl resumed>) = 0 [pid 882] <... openat resumed>) = 5 [pid 296] close(3 [pid 882] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 296] <... close resumed>) = 0 [pid 882] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 884] <... memfd_create resumed>) = 3 [pid 882] exit_group(0) = ? [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 886 [pid 884] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 882] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=882, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 883] <... close resumed>) = 0 [pid 883] chdir("./file0"./strace-static-x86_64: Process 885 attached ) = 0 ./strace-static-x86_64: Process 886 attached [pid 884] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 886] set_robust_list(0x55555671f660, 24) = 0 [pid 886] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 886] setpgid(0, 0) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 887 [pid 886] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 886] write(3, "1000", 4) = 4 [pid 886] close(3) = 0 [pid 886] write(1, "executing program\n", 18executing program ) = 18 [pid 886] memfd_create("syzkaller", 0) = 3 [pid 886] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 883] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 885] set_robust_list(0x55555671f660, 24 [pid 886] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 883] <... open resumed>) = 3 [pid 885] <... set_robust_list resumed>) = 0 [pid 883] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 885] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 883] <... mount resumed>) = 0 [pid 885] <... prctl resumed>) = 0 [pid 883] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 885] setpgid(0, 0 [pid 883] <... open resumed>) = 4 [pid 885] <... setpgid resumed>) = 0 [pid 883] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 885] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 883] <... mmap resumed>) = 0x20000000 [pid 885] <... openat resumed>) = 3 [pid 883] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 885] write(3, "1000", 4 [pid 883] <... openat resumed>) = 5 [pid 885] <... write resumed>) = 4 [pid 883] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 885] close(3 [pid 883] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 885] <... close resumed>) = 0 executing program [pid 885] write(1, "executing program\n", 18 [pid 883] exit_group(0 [pid 885] <... write resumed>) = 18 [pid 883] <... exit_group resumed>) = ? [pid 885] memfd_create("syzkaller", 0 [pid 883] +++ exited with 0 +++ [pid 885] <... memfd_create resumed>) = 3 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=883, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 885] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 885] <... mmap resumed>) = 0x7f1ddd1fa000 ./strace-static-x86_64: Process 887 attached [pid 887] set_robust_list(0x55555671f660, 24) = 0 [pid 887] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 887] setpgid(0, 0) = 0 [pid 887] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 887] write(3, "1000", 4) = 4 [pid 887] close(3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 887] <... close resumed>) = 0 [pid 887] write(1, "executing program\n", 18 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 888 executing program [pid 887] <... write resumed>) = 18 [pid 887] memfd_create("syzkaller", 0) = 3 [pid 885] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 887] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 886] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 885] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 888 attached [pid 885] munmap(0x7f1ddd1fa000, 138412032 [pid 888] set_robust_list(0x55555671f660, 24) = 0 [pid 885] <... munmap resumed>) = 0 [pid 888] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 885] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 888] <... prctl resumed>) = 0 [pid 888] setpgid(0, 0 [pid 885] <... openat resumed>) = 4 [pid 888] <... setpgid resumed>) = 0 [pid 885] ioctl(4, LOOP_SET_FD, 3 [pid 888] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 885] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 888] <... openat resumed>) = 3 [pid 885] ioctl(4, LOOP_CLR_FD [pid 888] write(3, "1000", 4 [pid 885] <... ioctl resumed>) = 0 [pid 888] <... write resumed>) = 4 [pid 888] close(3executing program ) = 0 [pid 888] write(1, "executing program\n", 18) = 18 [pid 888] memfd_create("syzkaller", 0) = 3 [pid 888] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 885] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 885] close(4) = 0 [pid 885] close(3 [pid 884] <... write resumed>) = 1048576 [pid 884] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 884] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 884] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 884] ioctl(4, LOOP_CLR_FD) = 0 [pid 885] <... close resumed>) = 0 [pid 885] chdir("./file0") = 0 [pid 885] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 884] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 884] close(4) = 0 [pid 884] close(3 [pid 888] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 885] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 885] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 885] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 884] <... close resumed>) = 0 [pid 887] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 885] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 886] <... write resumed>) = 1048576 [pid 885] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 885] exit_group(0) = ? [pid 886] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 886] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 885] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=885, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 886] <... openat resumed>) = 4 [pid 884] chdir("./file0" [pid 888] <... write resumed>) = 1048576 [pid 886] ioctl(4, LOOP_SET_FD, 3 [pid 884] <... chdir resumed>) = 0 [pid 886] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 886] ioctl(4, LOOP_CLR_FD [pid 888] munmap(0x7f1ddd1fa000, 138412032 [pid 887] <... write resumed>) = 1048576 [pid 884] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 299] <... restart_syscall resumed>) = 0 [pid 886] <... ioctl resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 888] <... munmap resumed>) = 0 [pid 299] close(3 [pid 887] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 889 [pid 884] <... open resumed>) = 3 ./strace-static-x86_64: Process 889 attached [pid 889] set_robust_list(0x55555671f660, 24) = 0 [pid 887] <... munmap resumed>) = 0 [pid 888] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 889] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 887] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 888] <... openat resumed>) = 4 [pid 889] <... prctl resumed>) = 0 [pid 888] ioctl(4, LOOP_SET_FD, 3 [pid 887] <... openat resumed>) = 4 [pid 889] setpgid(0, 0) = 0 [pid 887] ioctl(4, LOOP_SET_FD, 3 [pid 888] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 884] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 889] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 889] write(3, "1000", 4 [pid 888] ioctl(4, LOOP_CLR_FD [pid 887] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 889] <... write resumed>) = 4 [pid 889] close(3) = 0 [pid 889] write(1, "executing program\n", 18 [pid 884] <... mount resumed>) = 0 [pid 888] <... ioctl resumed>) = 0 executing program [pid 887] ioctl(4, LOOP_CLR_FD [pid 889] <... write resumed>) = 18 [pid 889] memfd_create("syzkaller", 0 [pid 886] ioctl(4, LOOP_SET_FD, 3 [pid 887] <... ioctl resumed>) = 0 [pid 886] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 884] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 889] <... memfd_create resumed>) = 3 [pid 889] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 886] close(4 [pid 884] <... open resumed>) = 4 [pid 886] <... close resumed>) = 0 [pid 884] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 886] close(3) = 0 [pid 884] <... mmap resumed>) = 0x20000000 [pid 888] ioctl(4, LOOP_SET_FD, 3 [pid 887] ioctl(4, LOOP_SET_FD, 3 [pid 888] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 887] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 884] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 888] close(4 [pid 887] close(4 [pid 884] <... openat resumed>) = 5 [pid 888] <... close resumed>) = 0 [pid 887] <... close resumed>) = 0 [pid 888] close(3 [pid 884] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 889] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 888] <... close resumed>) = 0 [pid 887] close(3 [pid 886] chdir("./file0" [pid 884] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 886] <... chdir resumed>) = 0 [pid 884] exit_group(0 [pid 886] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 884] <... exit_group resumed>) = ? [pid 884] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=884, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 886] <... open resumed>) = 3 [pid 887] <... close resumed>) = 0 [pid 888] chdir("./file0") = 0 [pid 887] chdir("./file0" [pid 888] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 886] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 888] <... open resumed>) = 3 [pid 887] <... chdir resumed>) = 0 [pid 886] <... mount resumed>) = 0 [pid 887] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 888] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 887] <... open resumed>) = 3 [pid 886] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 888] <... mount resumed>) = 0 [pid 886] <... open resumed>) = 4 [pid 888] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 887] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 886] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 888] <... open resumed>) = 4 [pid 886] <... mmap resumed>) = 0x20000000 [pid 887] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 888] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 889] <... write resumed>) = 1048576 [pid 887] <... open resumed>) = 4 [pid 889] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 889] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 889] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 888] <... mmap resumed>) = 0x20000000 [pid 887] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 889] ioctl(4, LOOP_CLR_FD) = 0 [pid 887] <... mmap resumed>) = 0x20000000 [pid 886] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 889] ioctl(4, LOOP_SET_FD, 3 [pid 886] <... openat resumed>) = 5 [pid 888] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 887] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 886] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 889] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 889] close(4) = 0 [pid 889] close(3 [pid 886] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 888] <... openat resumed>) = 5 [pid 886] exit_group(0 [pid 887] <... openat resumed>) = 5 [pid 888] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 886] <... exit_group resumed>) = ? [pid 297] <... restart_syscall resumed>) = 0 [pid 888] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 887] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 889] <... close resumed>) = 0 [pid 888] exit_group(0 [pid 887] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 886] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=886, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 887] exit_group(0 [pid 297] <... openat resumed>) = 3 [pid 888] <... exit_group resumed>) = ? [pid 887] <... exit_group resumed>) = ? [pid 297] ioctl(3, LOOP_CLR_FD [pid 888] +++ exited with 0 +++ [pid 297] <... ioctl resumed>) = 0 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=888, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 887] +++ exited with 0 +++ [pid 297] close(3 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=887, si_uid=0, si_status=0, si_utime=1, si_stime=0} --- [pid 297] <... close resumed>) = 0 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 889] chdir("./file0" [pid 296] <... restart_syscall resumed>) = 0 [pid 295] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 296] <... openat resumed>) = 3 [pid 295] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD [pid 295] ioctl(3, LOOP_CLR_FD [pid 296] <... ioctl resumed>) = 0 [pid 295] <... ioctl resumed>) = 0 [pid 296] close(3 [pid 295] close(3 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 890 [pid 296] <... close resumed>) = 0 [pid 295] <... close resumed>) = 0 [pid 889] <... chdir resumed>) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 889] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 892 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 891 ./strace-static-x86_64: Process 890 attached ./strace-static-x86_64: Process 891 attached [pid 891] set_robust_list(0x55555671f660, 24 [pid 890] set_robust_list(0x55555671f660, 24) = 0 [pid 891] <... set_robust_list resumed>) = 0 [pid 890] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 891] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 889] <... open resumed>) = 3 [pid 891] <... prctl resumed>) = 0 [pid 890] <... prctl resumed>) = 0 [pid 891] setpgid(0, 0 [pid 890] setpgid(0, 0 [pid 889] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 891] <... setpgid resumed>) = 0 [pid 890] <... setpgid resumed>) = 0 [pid 891] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 890] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 889] <... mount resumed>) = 0 [pid 891] <... openat resumed>) = 3 [pid 891] write(3, "1000", 4 [pid 889] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 890] write(3, "1000", 4 [pid 891] <... write resumed>) = 4 [pid 890] <... write resumed>) = 4 [pid 890] close(3 [pid 891] close(3 [pid 890] <... close resumed>) = 0 [pid 891] <... close resumed>) = 0 [pid 890] write(1, "executing program\n", 18executing program [pid 891] write(1, "executing program\n", 18executing program [pid 890] <... write resumed>) = 18 [pid 891] <... write resumed>) = 18 [pid 891] memfd_create("syzkaller", 0 [pid 890] memfd_create("syzkaller", 0 [pid 891] <... memfd_create resumed>) = 3 [pid 890] <... memfd_create resumed>) = 3 [pid 890] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 891] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 890] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 891] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 889] <... open resumed>) = 4 [pid 889] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 893 [pid 889] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 889] mount(NULL, 0x20002ac0, NULL, 0, NULL./strace-static-x86_64: Process 892 attached ) = -1 ENOENT (No such file or directory) [pid 889] exit_group(0) = ? [pid 889] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=889, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 893 attached [pid 893] set_robust_list(0x55555671f660, 24) = 0 [pid 893] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 892] set_robust_list(0x55555671f660, 24 [pid 893] <... prctl resumed>) = 0 [pid 893] setpgid(0, 0) = 0 [pid 892] <... set_robust_list resumed>) = 0 [pid 892] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 893] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 892] setpgid(0, 0 [pid 893] <... openat resumed>) = 3 [pid 892] <... setpgid resumed>) = 0 [pid 893] write(3, "1000", 4) = 4 [pid 893] close(3) = 0 executing program [pid 893] write(1, "executing program\n", 18) = 18 [pid 893] memfd_create("syzkaller", 0 [pid 892] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 893] <... memfd_create resumed>) = 3 [pid 893] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 892] <... openat resumed>) = 3 [pid 893] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 892] write(3, "1000", 4) = 4 [pid 892] close(3) = 0 [pid 892] write(1, "executing program\n", 18executing program ) = 18 [pid 892] memfd_create("syzkaller", 0) = 3 [pid 892] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 894 [pid 890] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 892] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 891] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 ./strace-static-x86_64: Process 894 attached [pid 894] set_robust_list(0x55555671f660, 24) = 0 [pid 894] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 894] setpgid(0, 0) = 0 [pid 894] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 894] write(3, "1000", 4) = 4 [pid 894] close(3) = 0 [pid 894] write(1, "executing program\n", 18executing program ) = 18 [pid 894] memfd_create("syzkaller", 0) = 3 [pid 894] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 890] <... write resumed>) = 1048576 [pid 893] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 891] munmap(0x7f1ddd1fa000, 138412032 [pid 890] munmap(0x7f1ddd1fa000, 138412032 [pid 894] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 893] <... write resumed>) = 1048576 [pid 892] <... write resumed>) = 1048576 [pid 891] <... munmap resumed>) = 0 [pid 893] munmap(0x7f1ddd1fa000, 138412032 [pid 892] munmap(0x7f1ddd1fa000, 138412032 [pid 891] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 890] <... munmap resumed>) = 0 [pid 893] <... munmap resumed>) = 0 [pid 891] <... openat resumed>) = 4 [pid 890] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 893] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 891] ioctl(4, LOOP_SET_FD, 3 [pid 893] <... openat resumed>) = 4 [pid 891] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 890] <... openat resumed>) = 4 [pid 893] ioctl(4, LOOP_SET_FD, 3 [pid 891] ioctl(4, LOOP_CLR_FD [pid 890] ioctl(4, LOOP_SET_FD, 3 [pid 893] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 891] <... ioctl resumed>) = 0 [pid 890] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 893] ioctl(4, LOOP_CLR_FD [pid 892] <... munmap resumed>) = 0 [pid 890] ioctl(4, LOOP_CLR_FD [pid 893] <... ioctl resumed>) = 0 [pid 892] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 890] <... ioctl resumed>) = 0 [pid 892] <... openat resumed>) = 4 [pid 892] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 892] ioctl(4, LOOP_CLR_FD) = 0 [pid 891] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 893] ioctl(4, LOOP_SET_FD, 3 [pid 891] close(4 [pid 890] ioctl(4, LOOP_SET_FD, 3 [pid 893] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 891] <... close resumed>) = 0 [pid 893] close(4 [pid 890] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 891] close(3 [pid 893] <... close resumed>) = 0 [pid 890] close(4 [pid 891] <... close resumed>) = 0 [pid 893] close(3 [pid 891] chdir("./file0" [pid 890] <... close resumed>) = 0 [pid 894] <... write resumed>) = 1048576 [pid 894] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 893] <... close resumed>) = 0 [pid 892] ioctl(4, LOOP_SET_FD, 3 [pid 891] <... chdir resumed>) = 0 [pid 890] close(3 [pid 893] chdir("./file0" [pid 892] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 891] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 894] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 894] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 894] ioctl(4, LOOP_CLR_FD) = 0 [pid 890] <... close resumed>) = 0 [pid 892] close(4 [pid 894] ioctl(4, LOOP_SET_FD, 3 [pid 891] <... open resumed>) = 3 [pid 892] <... close resumed>) = 0 [pid 893] <... chdir resumed>) = 0 [pid 890] chdir("./file0" [pid 893] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 892] close(3 [pid 891] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 890] <... chdir resumed>) = 0 [pid 894] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 890] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 894] close(4) = 0 [pid 894] close(3 [pid 893] <... open resumed>) = 3 [pid 890] <... open resumed>) = 3 [pid 891] <... mount resumed>) = 0 [pid 893] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 890] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 892] <... close resumed>) = 0 [pid 890] <... mount resumed>) = 0 [pid 893] <... mount resumed>) = 0 [pid 891] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 893] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 892] chdir("./file0" [pid 890] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 891] <... open resumed>) = 4 [pid 893] <... open resumed>) = 4 [pid 893] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 891] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 890] <... open resumed>) = 4 [pid 892] <... chdir resumed>) = 0 [pid 893] <... mmap resumed>) = 0x20000000 [pid 890] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 894] <... close resumed>) = 0 [pid 894] chdir("./file0") = 0 [pid 891] <... mmap resumed>) = 0x20000000 [pid 894] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 890] <... mmap resumed>) = 0x20000000 [pid 893] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 891] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 892] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 890] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 893] <... openat resumed>) = 5 [pid 893] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 891] <... openat resumed>) = 5 [pid 890] <... openat resumed>) = 5 [pid 892] <... open resumed>) = 3 [pid 890] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 893] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 892] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 891] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 893] exit_group(0 [pid 890] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 892] <... mount resumed>) = 0 [pid 891] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 893] <... exit_group resumed>) = ? [pid 892] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 890] exit_group(0 [pid 891] exit_group(0 [pid 894] <... open resumed>) = 3 [pid 894] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL) = 0 [pid 894] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 893] +++ exited with 0 +++ [pid 890] <... exit_group resumed>) = ? [pid 891] <... exit_group resumed>) = ? [pid 892] <... open resumed>) = 4 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=893, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 891] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=891, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 298] <... openat resumed>) = 3 [pid 295] <... restart_syscall resumed>) = 0 [pid 298] ioctl(3, LOOP_CLR_FD [pid 892] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 890] +++ exited with 0 +++ [pid 298] <... ioctl resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 298] close(3 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=890, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] <... openat resumed>) = 3 [pid 298] <... close resumed>) = 0 [pid 295] ioctl(3, LOOP_CLR_FD [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... ioctl resumed>) = 0 [pid 892] <... mmap resumed>) = 0x20000000 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 295] close(3 [pid 892] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 895 [pid 297] <... openat resumed>) = 3 [pid 295] <... close resumed>) = 0 [pid 892] <... openat resumed>) = 5 [pid 297] ioctl(3, LOOP_CLR_FD [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] <... ioctl resumed>) = 0 [pid 297] close(3 [pid 892] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 297] <... close resumed>) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 896 [pid 892] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 892] exit_group(0 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 897 [pid 892] <... exit_group resumed>) = ? [pid 894] <... open resumed>) = 4 [pid 894] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 892] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=892, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 894] <... mmap resumed>) = 0x20000000 [pid 894] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 894] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 894] exit_group(0) = ? [pid 894] +++ exited with 0 +++ ./strace-static-x86_64: Process 897 attached [pid 897] set_robust_list(0x55555671f660, 24) = 0 [pid 897] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 296] <... restart_syscall resumed>) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=894, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 897] <... prctl resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 296] <... openat resumed>) = 3 [pid 299] <... ioctl resumed>) = 0 [pid 296] ioctl(3, LOOP_CLR_FD [pid 299] close(3 [pid 296] <... ioctl resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 296] close(3 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... close resumed>) = 0 [pid 897] setpgid(0, 0) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 898 [pid 897] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 899 [pid 897] <... openat resumed>) = 3 ./strace-static-x86_64: Process 896 attached [pid 896] set_robust_list(0x55555671f660, 24) = 0 ./strace-static-x86_64: Process 895 attached [pid 897] write(3, "1000", 4 [pid 896] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 897] <... write resumed>) = 4 [pid 895] set_robust_list(0x55555671f660, 24./strace-static-x86_64: Process 898 attached ) = 0 [pid 898] set_robust_list(0x55555671f660, 24 [pid 895] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 898] <... set_robust_list resumed>) = 0 [pid 895] setpgid(0, 0) = 0 [pid 898] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 895] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 897] close(3 [pid 895] <... openat resumed>) = 3 [pid 898] setpgid(0, 0 [pid 895] write(3, "1000", 4 [pid 898] <... setpgid resumed>) = 0 [pid 895] <... write resumed>) = 4 [pid 895] close(3 [pid 898] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 895] <... close resumed>) = 0 executing program [pid 898] <... openat resumed>) = 3 [pid 895] write(1, "executing program\n", 18 [pid 898] write(3, "1000", 4 [pid 895] <... write resumed>) = 18 [pid 895] memfd_create("syzkaller", 0 [pid 898] <... write resumed>) = 4 [pid 898] close(3 [pid 895] <... memfd_create resumed>) = 3 [pid 898] <... close resumed>) = 0 [pid 895] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 898] write(1, "executing program\n", 18 [pid 895] <... mmap resumed>) = 0x7f1ddd1fa000 executing program [pid 897] <... close resumed>) = 0 [pid 897] write(1, "executing program\n", 18) = 18 [pid 897] memfd_create("syzkaller", 0 [pid 896] <... prctl resumed>) = 0 [pid 896] setpgid(0, 0) = 0 [pid 897] <... memfd_create resumed>) = 3 [pid 896] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 897] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 executing program [pid 898] <... write resumed>) = 18 [pid 896] <... openat resumed>) = 3 [pid 896] write(3, "1000", 4) = 4 [pid 896] close(3) = 0 [pid 896] write(1, "executing program\n", 18executing program ) = 18 [pid 896] memfd_create("syzkaller", 0 [pid 898] memfd_create("syzkaller", 0) = 3 [pid 896] <... memfd_create resumed>) = 3 [pid 898] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 896] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 898] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 899 attached [pid 899] set_robust_list(0x55555671f660, 24) = 0 [pid 899] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 899] setpgid(0, 0) = 0 [pid 899] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 899] write(3, "1000", 4) = 4 [pid 899] close(3) = 0 executing program [pid 899] write(1, "executing program\n", 18) = 18 [pid 899] memfd_create("syzkaller", 0) = 3 [pid 899] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 895] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 896] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 898] <... write resumed>) = 1048576 [pid 897] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 895] munmap(0x7f1ddd1fa000, 138412032 [pid 898] munmap(0x7f1ddd1fa000, 138412032 [pid 895] <... munmap resumed>) = 0 [pid 898] <... munmap resumed>) = 0 [pid 895] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 899] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 895] <... openat resumed>) = 4 [pid 898] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 895] ioctl(4, LOOP_SET_FD, 3 [pid 898] <... openat resumed>) = 4 [pid 895] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 898] ioctl(4, LOOP_SET_FD, 3 [pid 895] ioctl(4, LOOP_CLR_FD [pid 898] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 895] <... ioctl resumed>) = 0 [pid 898] ioctl(4, LOOP_CLR_FD) = 0 [pid 895] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 898] ioctl(4, LOOP_SET_FD, 3 [pid 895] close(4 [pid 898] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 895] <... close resumed>) = 0 [pid 898] close(4 [pid 895] close(3 [pid 898] <... close resumed>) = 0 [pid 895] <... close resumed>) = 0 [pid 898] close(3 [pid 895] chdir("./file0") = 0 [pid 895] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 898] <... close resumed>) = 0 [pid 895] <... open resumed>) = 3 [pid 898] chdir("./file0" [pid 895] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 898] <... chdir resumed>) = 0 [pid 895] <... mount resumed>) = 0 [pid 898] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 895] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 898] <... open resumed>) = 3 [pid 898] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 895] <... open resumed>) = 4 [pid 898] <... mount resumed>) = 0 [pid 895] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 898] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 895] <... mmap resumed>) = 0x20000000 [pid 898] <... open resumed>) = 4 [pid 895] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 898] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 895] <... openat resumed>) = 5 [pid 897] <... write resumed>) = 1048576 [pid 898] <... mmap resumed>) = 0x20000000 [pid 895] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 898] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 895] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 895] exit_group(0 [pid 898] <... openat resumed>) = 5 [pid 895] <... exit_group resumed>) = ? [pid 897] munmap(0x7f1ddd1fa000, 138412032 [pid 895] +++ exited with 0 +++ [pid 898] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=895, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 897] <... munmap resumed>) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 900 [pid 896] <... write resumed>) = 1048576 [pid 897] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 897] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 898] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 898] exit_group(0./strace-static-x86_64: Process 900 attached ) = ? [pid 897] ioctl(4, LOOP_CLR_FD) = 0 [pid 896] munmap(0x7f1ddd1fa000, 138412032 [pid 898] +++ exited with 0 +++ [pid 900] set_robust_list(0x55555671f660, 24) = 0 [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=898, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 900] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 900] <... prctl resumed>) = 0 [pid 897] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 897] close(4) = 0 [pid 897] close(3 [pid 900] setpgid(0, 0 [pid 896] <... munmap resumed>) = 0 [pid 896] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 896] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 900] <... setpgid resumed>) = 0 [pid 899] <... write resumed>) = 1048576 [pid 900] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 899] munmap(0x7f1ddd1fa000, 138412032 [pid 900] <... openat resumed>) = 3 [pid 900] write(3, "1000", 4 [pid 899] <... munmap resumed>) = 0 [pid 900] <... write resumed>) = 4 [pid 900] close(3 [pid 899] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 900] <... close resumed>) = 0 executing program [pid 900] write(1, "executing program\n", 18 [pid 899] <... openat resumed>) = 4 [pid 900] <... write resumed>) = 18 [pid 900] memfd_create("syzkaller", 0 [pid 899] ioctl(4, LOOP_SET_FD, 3 [pid 900] <... memfd_create resumed>) = 3 [pid 899] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 900] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 899] ioctl(4, LOOP_CLR_FD [pid 896] ioctl(4, LOOP_CLR_FD) = 0 [pid 896] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 896] close(4) = 0 [pid 896] close(3 [pid 299] <... restart_syscall resumed>) = 0 [pid 899] <... ioctl resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 901 [pid 899] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 899] close(4 [pid 897] <... close resumed>) = 0 [pid 897] chdir("./file0") = 0 [pid 897] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 896] <... close resumed>) = 0 [pid 896] chdir("./file0") = 0 [pid 896] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 897] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 897] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 896] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 897] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 896] <... mount resumed>) = 0 [pid 897] <... mmap resumed>) = 0x20000000 [pid 896] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 899] <... close resumed>) = 0 [pid 900] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 899] close(3./strace-static-x86_64: Process 901 attached [pid 896] <... open resumed>) = 4 [pid 896] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 897] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 897] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 901] set_robust_list(0x55555671f660, 24 [pid 897] exit_group(0 [pid 896] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 899] <... close resumed>) = 0 [pid 896] <... openat resumed>) = 5 [pid 901] <... set_robust_list resumed>) = 0 [pid 897] <... exit_group resumed>) = ? [pid 897] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=897, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 896] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 896] exit_group(0 [pid 900] <... write resumed>) = 1048576 [pid 896] <... exit_group resumed>) = ? [pid 901] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 900] munmap(0x7f1ddd1fa000, 138412032 [pid 899] chdir("./file0" [pid 901] <... prctl resumed>) = 0 [pid 899] <... chdir resumed>) = 0 [pid 901] setpgid(0, 0 [pid 899] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 901] <... setpgid resumed>) = 0 [pid 899] <... open resumed>) = 3 [pid 901] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 899] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 901] <... openat resumed>) = 3 [pid 899] <... mount resumed>) = 0 [pid 901] write(3, "1000", 4 [pid 900] <... munmap resumed>) = 0 [pid 899] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 901] <... write resumed>) = 4 [pid 899] <... open resumed>) = 4 [pid 901] close(3 [pid 900] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 901] <... close resumed>) = 0 [pid 899] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 901] write(1, "executing program\n", 18 [pid 900] <... openat resumed>) = 4 executing program [pid 899] <... mmap resumed>) = 0x20000000 [pid 901] <... write resumed>) = 18 [pid 900] ioctl(4, LOOP_SET_FD, 3 [pid 899] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 901] memfd_create("syzkaller", 0 [pid 899] <... openat resumed>) = 5 [pid 901] <... memfd_create resumed>) = 3 [pid 900] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 899] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 901] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 900] ioctl(4, LOOP_CLR_FD [pid 899] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 901] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 900] <... ioctl resumed>) = 0 [pid 899] exit_group(0 [pid 896] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=896, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 902 ./strace-static-x86_64: Process 902 attached [pid 902] set_robust_list(0x55555671f660, 24) = 0 [pid 902] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 902] setpgid(0, 0) = 0 [pid 902] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 899] <... exit_group resumed>) = ? [pid 902] <... openat resumed>) = 3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 902] write(3, "1000", 4) = 4 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 903 [pid 902] close(3 [pid 899] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=899, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 902] <... close resumed>) = 0 [pid 902] write(1, "executing program\n", 18executing program ) = 18 [pid 902] memfd_create("syzkaller", 0) = 3 [pid 902] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 901] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 903 attached [pid 903] set_robust_list(0x55555671f660, 24) = 0 [pid 903] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 903] setpgid(0, 0 [pid 900] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 900] close(4) = 0 [pid 900] close(3 [pid 903] <... setpgid resumed>) = 0 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 903] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 904 [pid 903] <... openat resumed>) = 3 [pid 903] write(3, "1000", 4) = 4 [pid 903] close(3) = 0 [pid 903] write(1, "executing program\n", 18executing program ) = 18 [pid 900] <... close resumed>) = 0 [pid 903] memfd_create("syzkaller", 0) = 3 [pid 903] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 900] chdir("./file0"./strace-static-x86_64: Process 904 attached [pid 904] set_robust_list(0x55555671f660, 24) = 0 [pid 904] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 904] setpgid(0, 0) = 0 [pid 900] <... chdir resumed>) = 0 [pid 900] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 904] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 900] <... open resumed>) = 3 [pid 900] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 904] <... openat resumed>) = 3 [pid 900] <... mount resumed>) = 0 [pid 904] write(3, "1000", 4) = 4 [pid 904] close(3) = 0 [pid 904] write(1, "executing program\n", 18executing program ) = 18 [pid 904] memfd_create("syzkaller", 0 [pid 901] <... write resumed>) = 1048576 [pid 900] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 901] munmap(0x7f1ddd1fa000, 138412032 [pid 900] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 904] <... memfd_create resumed>) = 3 [pid 904] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 900] <... mmap resumed>) = 0x20000000 [pid 901] <... munmap resumed>) = 0 [pid 900] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 901] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 900] <... openat resumed>) = 5 [pid 900] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 900] exit_group(0) = ? [pid 900] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=900, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 901] <... openat resumed>) = 4 [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 902] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 901] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 901] ioctl(4, LOOP_CLR_FD) = 0 [pid 901] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 901] close(4) = 0 [pid 901] close(3) = 0 [pid 901] chdir("./file0") = 0 [pid 901] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 905 [pid 901] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 905 attached [pid 903] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 901] <... mount resumed>) = 0 [pid 905] set_robust_list(0x55555671f660, 24 [pid 901] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 905] <... set_robust_list resumed>) = 0 [pid 901] <... open resumed>) = 4 [pid 901] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 905] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 901] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 905] <... prctl resumed>) = 0 [pid 901] <... openat resumed>) = 5 [pid 905] setpgid(0, 0 [pid 901] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 905] <... setpgid resumed>) = 0 [pid 901] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 905] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 901] exit_group(0) = ? [pid 905] <... openat resumed>) = 3 [pid 901] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=901, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 905] write(3, "1000", 4executing program ) = 4 [pid 905] close(3 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 905] <... close resumed>) = 0 [pid 905] write(1, "executing program\n", 18 [pid 299] <... openat resumed>) = 3 [pid 905] <... write resumed>) = 18 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 905] memfd_create("syzkaller", 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 905] <... memfd_create resumed>) = 3 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 906 [pid 905] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 902] <... write resumed>) = 1048576 [pid 902] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 902] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 902] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 902] ioctl(4, LOOP_CLR_FD) = 0 [pid 904] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 903] <... write resumed>) = 1048576 [pid 902] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 902] close(4) = 0 [pid 902] close(3 [pid 905] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576./strace-static-x86_64: Process 906 attached [pid 902] <... close resumed>) = 0 [pid 905] <... write resumed>) = 1048576 [pid 906] set_robust_list(0x55555671f660, 24 [pid 903] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 903] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 903] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 903] ioctl(4, LOOP_CLR_FD) = 0 [pid 904] <... write resumed>) = 1048576 [pid 903] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 902] chdir("./file0" [pid 903] close(4) = 0 [pid 906] <... set_robust_list resumed>) = 0 [pid 905] munmap(0x7f1ddd1fa000, 138412032 [pid 906] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 906] setpgid(0, 0) = 0 [pid 906] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 906] write(3, "1000", 4) = 4 [pid 906] close(3) = 0 [pid 905] <... munmap resumed>) = 0 [pid 906] write(1, "executing program\n", 18 [pid 905] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 906] <... write resumed>) = 18 executing program [pid 906] memfd_create("syzkaller", 0 [pid 905] <... openat resumed>) = 4 [pid 906] <... memfd_create resumed>) = 3 [pid 905] ioctl(4, LOOP_SET_FD, 3 [pid 906] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 905] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 906] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 905] ioctl(4, LOOP_CLR_FD [pid 902] <... chdir resumed>) = 0 [pid 903] close(3 [pid 902] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 902] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 902] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 905] <... ioctl resumed>) = 0 [pid 902] <... open resumed>) = 4 [pid 902] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 906] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 902] <... mmap resumed>) = 0x20000000 [pid 902] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 902] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 903] <... close resumed>) = 0 [pid 902] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 902] exit_group(0) = ? [pid 904] munmap(0x7f1ddd1fa000, 138412032 [pid 906] <... write resumed>) = 1048576 [pid 903] chdir("./file0" [pid 902] +++ exited with 0 +++ [pid 905] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 905] close(4) = 0 [pid 905] close(3 [pid 906] munmap(0x7f1ddd1fa000, 138412032 [pid 905] <... close resumed>) = 0 [pid 904] <... munmap resumed>) = 0 [pid 903] <... chdir resumed>) = 0 [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=902, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 905] chdir("./file0") = 0 [pid 905] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 906] <... munmap resumed>) = 0 [pid 904] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 903] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 905] <... open resumed>) = 3 [pid 905] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 905] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 905] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 903] <... open resumed>) = 3 [pid 906] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 904] <... openat resumed>) = 4 [pid 903] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 904] ioctl(4, LOOP_SET_FD, 3 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 906] <... openat resumed>) = 4 [pid 904] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 905] <... mmap resumed>) = 0x20000000 [pid 903] <... mount resumed>) = 0 [pid 904] ioctl(4, LOOP_CLR_FD [pid 297] <... openat resumed>) = 3 [pid 906] ioctl(4, LOOP_SET_FD, 3 [pid 904] <... ioctl resumed>) = 0 [pid 903] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 297] ioctl(3, LOOP_CLR_FD [pid 905] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 906] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 297] <... ioctl resumed>) = 0 [pid 905] <... openat resumed>) = 5 [pid 903] <... open resumed>) = 4 [pid 906] ioctl(4, LOOP_CLR_FD [pid 297] close(3 [pid 906] <... ioctl resumed>) = 0 [pid 903] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 297] <... close resumed>) = 0 [pid 905] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 905] exit_group(0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 905] <... exit_group resumed>) = ? [pid 905] +++ exited with 0 +++ ./strace-static-x86_64: Process 907 attached [pid 907] set_robust_list(0x55555671f660, 24) = 0 [pid 903] <... mmap resumed>) = 0x20000000 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 907 [pid 906] ioctl(4, LOOP_SET_FD, 3 [pid 904] ioctl(4, LOOP_SET_FD, 3 [pid 903] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=905, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 907] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 907] setpgid(0, 0) = 0 [pid 907] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 904] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 906] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 903] <... openat resumed>) = 5 [pid 906] close(4 [pid 904] close(4 [pid 903] mount(NULL, 0x20002ac0, NULL, 0, NULLexecuting program [pid 907] <... openat resumed>) = 3 [pid 904] <... close resumed>) = 0 [pid 906] <... close resumed>) = 0 [pid 904] close(3 [pid 907] write(3, "1000", 4) = 4 [pid 907] close(3 [pid 903] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 907] <... close resumed>) = 0 [pid 907] write(1, "executing program\n", 18) = 18 [pid 907] memfd_create("syzkaller", 0) = 3 [pid 907] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 904] <... close resumed>) = 0 [pid 906] close(3 [pid 903] exit_group(0 [pid 906] <... close resumed>) = 0 [pid 903] <... exit_group resumed>) = ? [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 904] chdir("./file0" [pid 298] close(3) = 0 [pid 904] <... chdir resumed>) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 904] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 903] +++ exited with 0 +++ [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 908 [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=903, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 904] <... open resumed>) = 3 [pid 907] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 906] chdir("./file0" [pid 904] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 906] <... chdir resumed>) = 0 [pid 904] <... mount resumed>) = 0 [pid 906] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 904] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 906] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 904] <... open resumed>) = 4 [pid 906] <... mount resumed>) = 0 ./strace-static-x86_64: Process 908 attached [pid 906] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 908] set_robust_list(0x55555671f660, 24) = 0 [pid 908] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 904] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 906] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 908] <... prctl resumed>) = 0 [pid 908] setpgid(0, 0) = 0 [pid 908] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 295] <... restart_syscall resumed>) = 0 [pid 904] <... mmap resumed>) = 0x20000000 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 906] <... mmap resumed>) = 0x20000000 [pid 904] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 909 [pid 906] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 904] <... openat resumed>) = 5 [pid 906] <... openat resumed>) = 5 [pid 908] <... openat resumed>) = 3 [pid 906] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 904] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 906] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 904] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 908] write(3, "1000", 4) = 4 [pid 908] close(3) = 0 [pid 908] write(1, "executing program\n", 18executing program ) = 18 [pid 908] memfd_create("syzkaller", 0) = 3 [pid 908] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 906] exit_group(0 [pid 904] exit_group(0 [pid 906] <... exit_group resumed>) = ? [pid 904] <... exit_group resumed>) = ? [pid 906] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=906, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 904] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=904, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 907] <... write resumed>) = 1048576 [pid 907] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 907] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 907] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 907] ioctl(4, LOOP_CLR_FD) = 0 [pid 296] <... restart_syscall resumed>) = 0 ./strace-static-x86_64: Process 909 attached [pid 299] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 909] set_robust_list(0x55555671f660, 24 [pid 296] <... openat resumed>) = 3 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 296] ioctl(3, LOOP_CLR_FD [pid 299] <... openat resumed>) = 3 [pid 296] <... ioctl resumed>) = 0 [pid 299] ioctl(3, LOOP_CLR_FD [pid 296] close(3 [pid 299] <... ioctl resumed>) = 0 [pid 296] <... close resumed>) = 0 [pid 299] close(3 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 909] <... set_robust_list resumed>) = 0 [pid 299] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 910 [pid 909] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 911 [pid 909] <... prctl resumed>) = 0 [pid 907] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 907] close(4) = 0 [pid 907] close(3 [pid 909] setpgid(0, 0) = 0 [pid 909] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 909] write(3, "1000", 4) = 4 [pid 909] close(3) = 0 [pid 909] write(1, "executing program\n", 18executing program ) = 18 [pid 909] memfd_create("syzkaller", 0) = 3 [pid 909] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 907] <... close resumed>) = 0 [pid 907] chdir("./file0") = 0 [pid 907] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 909] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 907] <... open resumed>) = 3 [pid 907] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL) = 0 [pid 908] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 907] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 907] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 ./strace-static-x86_64: Process 911 attached [pid 911] set_robust_list(0x55555671f660, 24) = 0 [pid 911] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 911] setpgid(0, 0) = 0 [pid 911] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 909] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 911] write(3, "1000", 4executing program ) = 4 [pid 911] close(3) = 0 [pid 911] write(1, "executing program\n", 18) = 18 [pid 911] memfd_create("syzkaller", 0) = 3 [pid 911] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 907] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 910 attached ) = 5 [pid 907] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 907] exit_group(0) = ? [pid 910] set_robust_list(0x55555671f660, 24) = 0 [pid 910] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 910] setpgid(0, 0) = 0 [pid 907] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=907, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 912 [pid 910] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 910] write(3, "1000", 4 [pid 908] <... write resumed>) = 1048576 [pid 908] munmap(0x7f1ddd1fa000, 138412032 [pid 910] <... write resumed>) = 4 [pid 908] <... munmap resumed>) = 0 [pid 910] close(3 [pid 908] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 910] <... close resumed>) = 0 [pid 908] <... openat resumed>) = 4 [pid 908] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 908] ioctl(4, LOOP_CLR_FD) = 0 ./strace-static-x86_64: Process 912 attached [pid 912] set_robust_list(0x55555671f660, 24) = 0 [pid 912] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 910] write(1, "executing program\n", 18 [pid 912] <... prctl resumed>) = 0 [pid 908] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 908] close(4executing program ) = 0 [pid 908] close(3 [pid 910] <... write resumed>) = 18 [pid 910] memfd_create("syzkaller", 0) = 3 [pid 912] setpgid(0, 0) = 0 [pid 912] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 910] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 executing program [pid 912] <... openat resumed>) = 3 [pid 912] write(3, "1000", 4) = 4 [pid 912] close(3) = 0 [pid 911] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 912] write(1, "executing program\n", 18) = 18 [pid 912] memfd_create("syzkaller", 0) = 3 [pid 912] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 908] <... close resumed>) = 0 [pid 908] chdir("./file0") = 0 [pid 908] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 908] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL) = 0 [pid 909] <... write resumed>) = 1048576 [pid 908] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 908] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 908] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 908] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 908] exit_group(0) = ? [pid 908] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=908, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 909] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 911] <... write resumed>) = 1048576 [pid 911] munmap(0x7f1ddd1fa000, 138412032 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 911] <... munmap resumed>) = 0 [pid 911] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 911] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 911] ioctl(4, LOOP_CLR_FD) = 0 [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 913 [pid 909] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 909] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 911] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 911] close(4) = 0 [pid 911] close(3 [pid 909] ioctl(4, LOOP_CLR_FD) = 0 [pid 910] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 911] <... close resumed>) = 0 [pid 909] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 909] close(4 [pid 912] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 909] <... close resumed>) = 0 [pid 909] close(3./strace-static-x86_64: Process 913 attached [pid 913] set_robust_list(0x55555671f660, 24) = 0 [pid 913] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 913] setpgid(0, 0) = 0 [pid 913] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 911] chdir("./file0") = 0 [pid 911] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 909] <... close resumed>) = 0 [pid 913] <... openat resumed>) = 3 [pid 913] write(3, "1000", 4) = 4 [pid 913] close(3executing program [pid 909] chdir("./file0" [pid 913] <... close resumed>) = 0 [pid 913] write(1, "executing program\n", 18) = 18 [pid 913] memfd_create("syzkaller", 0) = 3 [pid 913] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 910] <... write resumed>) = 1048576 [pid 911] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 913] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 912] <... write resumed>) = 1048576 [pid 910] munmap(0x7f1ddd1fa000, 138412032 [pid 909] <... chdir resumed>) = 0 [pid 911] <... mount resumed>) = 0 [pid 910] <... munmap resumed>) = 0 [pid 909] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 911] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 911] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 910] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 909] <... open resumed>) = 3 [pid 911] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 911] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 911] exit_group(0) = ? [pid 911] +++ exited with 0 +++ [pid 910] <... openat resumed>) = 4 [pid 909] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=911, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 912] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 910] ioctl(4, LOOP_SET_FD, 3 [pid 912] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 912] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 909] <... mount resumed>) = 0 [pid 910] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 912] ioctl(4, LOOP_CLR_FD) = 0 [pid 910] ioctl(4, LOOP_CLR_FD [pid 909] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 910] <... ioctl resumed>) = 0 [pid 909] <... open resumed>) = 4 [pid 909] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 912] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 912] close(4) = 0 [pid 912] close(3) = 0 [pid 909] <... mmap resumed>) = 0x20000000 [pid 912] chdir("./file0") = 0 [pid 912] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 910] ioctl(4, LOOP_SET_FD, 3 [pid 909] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 910] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 910] close(4 [pid 912] <... open resumed>) = 3 [pid 912] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 910] <... close resumed>) = 0 [pid 909] <... openat resumed>) = 5 [pid 912] <... mount resumed>) = 0 [pid 912] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 910] close(3 [pid 909] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 912] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 914 [pid 910] <... close resumed>) = 0 [pid 909] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 912] <... mmap resumed>) = 0x20000000 [pid 912] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 912] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 909] exit_group(0 [pid 912] exit_group(0) = ? [pid 909] <... exit_group resumed>) = ? [pid 912] +++ exited with 0 +++ [pid 909] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=909, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=912, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 910] chdir("./file0") = 0 [pid 910] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 910] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 ./strace-static-x86_64: Process 914 attached [pid 914] set_robust_list(0x55555671f660, 24) = 0 [pid 914] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 910] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 914] <... prctl resumed>) = 0 [pid 913] <... write resumed>) = 1048576 [pid 914] setpgid(0, 0 [pid 910] <... open resumed>) = 4 [pid 914] <... setpgid resumed>) = 0 [pid 914] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 910] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0executing program [pid 914] <... openat resumed>) = 3 [pid 913] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 914] write(3, "1000", 4) = 4 [pid 914] close(3) = 0 [pid 914] write(1, "executing program\n", 18) = 18 [pid 914] memfd_create("syzkaller", 0 [pid 913] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 910] <... mmap resumed>) = 0x20000000 [pid 914] <... memfd_create resumed>) = 3 [pid 913] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 913] ioctl(4, LOOP_CLR_FD [pid 914] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 913] <... ioctl resumed>) = 0 [pid 914] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 910] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 910] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 910] exit_group(0 [pid 295] <... restart_syscall resumed>) = 0 [pid 910] <... exit_group resumed>) = ? [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 915 [pid 913] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 913] close(4) = 0 [pid 913] close(3 [pid 910] +++ exited with 0 +++ [pid 297] <... restart_syscall resumed>) = 0 [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=910, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 916 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR./strace-static-x86_64: Process 916 attached ) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 916] set_robust_list(0x55555671f660, 24 [pid 296] <... clone resumed>, child_tidptr=0x55555671f650) = 917 [pid 916] <... set_robust_list resumed>) = 0 [pid 913] <... close resumed>) = 0 [pid 916] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 913] chdir("./file0") = 0 [pid 913] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 916] <... prctl resumed>) = 0 [pid 916] setpgid(0, 0) = 0 [pid 916] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 913] <... open resumed>) = 3 [pid 913] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 916] write(3, "1000", 4) = 4 [pid 916] close(3 [pid 913] <... mount resumed>) = 0 [pid 916] <... close resumed>) = 0 [pid 913] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 ./strace-static-x86_64: Process 915 attached [pid 915] set_robust_list(0x55555671f660, 24) = 0 [pid 915] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 913] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 916] write(1, "executing program\n", 18executing program ) = 18 [pid 915] <... prctl resumed>) = 0 [pid 915] setpgid(0, 0 [pid 916] memfd_create("syzkaller", 0 [pid 915] <... setpgid resumed>) = 0 [pid 915] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 916] <... memfd_create resumed>) = 3 [pid 916] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0executing program ) = 0x7f1ddd1fa000 [pid 915] <... openat resumed>) = 3 [pid 913] <... mmap resumed>) = 0x20000000 [pid 915] write(3, "1000", 4) = 4 [pid 915] close(3) = 0 [pid 915] write(1, "executing program\n", 18) = 18 [pid 915] memfd_create("syzkaller", 0) = 3 [pid 915] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 914] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 913] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 913] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 913] exit_group(0) = ? [pid 916] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 913] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=913, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 916] <... write resumed>) = 1048576 [pid 914] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 917 attached [pid 916] munmap(0x7f1ddd1fa000, 138412032 [pid 915] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 298] <... restart_syscall resumed>) = 0 [pid 917] set_robust_list(0x55555671f660, 24 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 917] <... set_robust_list resumed>) = 0 [pid 298] <... openat resumed>) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 917] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 298] <... clone resumed>, child_tidptr=0x55555671f650) = 918 [pid 914] munmap(0x7f1ddd1fa000, 138412032 [pid 917] <... prctl resumed>) = 0 [pid 917] setpgid(0, 0 [pid 916] <... munmap resumed>) = 0 [pid 914] <... munmap resumed>) = 0 [pid 914] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 917] <... setpgid resumed>) = 0 [pid 914] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 914] ioctl(4, LOOP_CLR_FD) = 0 [pid 916] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 916] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 916] ioctl(4, LOOP_CLR_FD [pid 917] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 916] <... ioctl resumed>) = 0 [pid 917] write(3, "1000", 4) = 4 [pid 914] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 914] close(4) = 0 [pid 914] close(3 [pid 917] close(3) = 0 [pid 917] write(1, "executing program\n", 18) = 18 [pid 916] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 916] close(4) = 0 executing program [pid 917] memfd_create("syzkaller", 0 [pid 916] close(3 [pid 917] <... memfd_create resumed>) = 3 [pid 917] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 914] <... close resumed>) = 0 [pid 916] <... close resumed>) = 0 [pid 917] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 915] <... write resumed>) = 1048576 [pid 914] chdir("./file0") = 0 [pid 916] chdir("./file0") = 0 [pid 916] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 914] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 916] <... open resumed>) = 3 [pid 914] <... open resumed>) = 3 [pid 914] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL./strace-static-x86_64: Process 918 attached [pid 916] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 914] <... mount resumed>) = 0 [pid 914] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 916] <... mount resumed>) = 0 [pid 916] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 918] set_robust_list(0x55555671f660, 24 [pid 914] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 916] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 918] <... set_robust_list resumed>) = 0 [pid 918] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 915] munmap(0x7f1ddd1fa000, 138412032 [pid 918] <... prctl resumed>) = 0 [pid 918] setpgid(0, 0 [pid 915] <... munmap resumed>) = 0 [pid 918] <... setpgid resumed>) = 0 [pid 915] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 915] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 915] ioctl(4, LOOP_CLR_FD) = 0 [pid 916] <... mmap resumed>) = 0x20000000 [pid 914] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 916] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 914] <... openat resumed>) = 5 [pid 916] <... openat resumed>) = 5 [pid 916] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 914] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 916] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 914] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 916] exit_group(0 [pid 914] exit_group(0) = ? [pid 916] <... exit_group resumed>) = ? [pid 918] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 915] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 915] close(4) = 0 [pid 915] close(3 [pid 917] <... write resumed>) = 1048576 [pid 918] <... openat resumed>) = 3 [pid 916] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=916, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 914] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=914, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 915] <... close resumed>) = 0 [pid 915] chdir("./file0") = 0 [pid 915] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 915] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 915] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 915] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 915] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 915] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 915] exit_group(0) = ? [pid 299] <... restart_syscall resumed>) = 0 [pid 297] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 299] <... openat resumed>) = 3 [pid 297] <... openat resumed>) = 3 [pid 299] ioctl(3, LOOP_CLR_FD [pid 297] ioctl(3, LOOP_CLR_FD [pid 299] <... ioctl resumed>) = 0 [pid 297] <... ioctl resumed>) = 0 [pid 299] close(3 [pid 297] close(3 [pid 299] <... close resumed>) = 0 [pid 297] <... close resumed>) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 918] write(3, "1000", 4 [pid 917] munmap(0x7f1ddd1fa000, 138412032 [pid 299] <... clone resumed>, child_tidptr=0x55555671f650) = 920 [pid 297] <... clone resumed>, child_tidptr=0x55555671f650) = 921 [pid 918] <... write resumed>) = 4 [pid 917] <... munmap resumed>) = 0 [pid 918] close(3) = 0 [pid 917] openat(AT_FDCWD, "/dev/loop1", O_RDWRexecuting program [pid 918] write(1, "executing program\n", 18 [pid 917] <... openat resumed>) = 4 [pid 918] <... write resumed>) = 18 [pid 918] memfd_create("syzkaller", 0 [pid 917] ioctl(4, LOOP_SET_FD, 3 [pid 918] <... memfd_create resumed>) = 3 [pid 917] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 918] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 917] ioctl(4, LOOP_CLR_FD [pid 918] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 917] <... ioctl resumed>) = 0 executing program [pid 915] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=915, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 295] restart_syscall(<... resuming interrupted clone ...>./strace-static-x86_64: Process 921 attached [pid 921] set_robust_list(0x55555671f660, 24) = 0 [pid 921] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 921] setpgid(0, 0) = 0 [pid 921] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 921] write(3, "1000", 4) = 4 [pid 921] close(3) = 0 [pid 921] write(1, "executing program\n", 18) = 18 [pid 921] memfd_create("syzkaller", 0) = 3 [pid 921] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 918] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 922 [pid 917] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 917] close(4) = 0 [pid 917] close(3 [pid 921] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 917] <... close resumed>) = 0 ./strace-static-x86_64: Process 922 attached [pid 922] set_robust_list(0x55555671f660, 24) = 0 [pid 922] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 917] chdir("./file0" [pid 922] <... prctl resumed>) = 0 [pid 922] setpgid(0, 0) = 0 [pid 917] <... chdir resumed>) = 0 [pid 917] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 922] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 922] write(3, "1000", 4) = 4 [pid 917] <... open resumed>) = 3 executing program [pid 922] close(3) = 0 [pid 922] write(1, "executing program\n", 18) = 18 [pid 922] memfd_create("syzkaller", 0) = 3 [pid 917] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL [pid 922] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 917] <... mount resumed>) = 0 [pid 917] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 917] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 917] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 917] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 917] exit_group(0 [pid 921] <... write resumed>) = 1048576 ./strace-static-x86_64: Process 920 attached [pid 920] set_robust_list(0x55555671f660, 24) = 0 [pid 920] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 920] setpgid(0, 0) = 0 [pid 920] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 921] munmap(0x7f1ddd1fa000, 138412032 [pid 920] write(3, "1000", 4 [pid 918] <... write resumed>) = 1048576 [pid 917] <... exit_group resumed>) = ? [pid 920] <... write resumed>) = 4 executing program [pid 921] <... munmap resumed>) = 0 [pid 920] close(3) = 0 [pid 920] write(1, "executing program\n", 18) = 18 [pid 920] memfd_create("syzkaller", 0) = 3 [pid 920] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 921] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 917] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=917, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 921] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 921] ioctl(4, LOOP_CLR_FD) = 0 [pid 922] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 921] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 921] close(4) = 0 [pid 921] close(3 [pid 918] munmap(0x7f1ddd1fa000, 138412032 [pid 296] <... restart_syscall resumed>) = 0 [pid 296] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 918] <... munmap resumed>) = 0 [pid 296] <... openat resumed>) = 3 [pid 296] ioctl(3, LOOP_CLR_FD) = 0 [pid 296] close(3) = 0 [pid 296] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 923 [pid 918] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 4 [pid 918] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 918] ioctl(4, LOOP_CLR_FD) = 0 [pid 921] <... close resumed>) = 0 [pid 918] ioctl(4, LOOP_SET_FD, 3./strace-static-x86_64: Process 923 attached ) = -1 EBUSY (Device or resource busy) [pid 918] close(4 [pid 923] set_robust_list(0x55555671f660, 24 [pid 918] <... close resumed>) = 0 [pid 923] <... set_robust_list resumed>) = 0 [pid 918] close(3 [pid 921] chdir("./file0") = 0 [pid 921] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 918] <... close resumed>) = 0 [pid 921] mount("/dev/loop2", "./bus", NULL, MS_BIND, NULL [pid 923] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 918] chdir("./file0" [pid 921] <... mount resumed>) = 0 [pid 918] <... chdir resumed>) = 0 [pid 923] <... prctl resumed>) = 0 [pid 918] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 923] setpgid(0, 0 [pid 921] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 918] <... open resumed>) = 3 [pid 923] <... setpgid resumed>) = 0 [pid 921] <... open resumed>) = 4 [pid 921] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 923] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 918] mount("/dev/loop3", "./bus", NULL, MS_BIND, NULL [pid 923] <... openat resumed>) = 3 [pid 923] write(3, "1000", 4) = 4 [pid 923] close(3) = 0 [pid 918] <... mount resumed>) = 0 [pid 923] write(1, "executing program\n", 18 [pid 918] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXECexecuting program [pid 923] <... write resumed>) = 18 [pid 923] memfd_create("syzkaller", 0 [pid 921] <... mmap resumed>) = 0x20000000 [pid 923] <... memfd_create resumed>) = 3 [pid 921] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 923] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 918] <... open resumed>) = 4 [pid 921] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 921] exit_group(0 [pid 920] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 921] <... exit_group resumed>) = ? [pid 918] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 921] +++ exited with 0 +++ [pid 297] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=921, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 297] restart_syscall(<... resuming interrupted clone ...> [pid 918] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 922] <... write resumed>) = 1048576 [pid 918] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 922] munmap(0x7f1ddd1fa000, 138412032 [pid 918] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 918] exit_group(0) = ? [pid 922] <... munmap resumed>) = 0 [pid 922] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 297] <... restart_syscall resumed>) = 0 [pid 297] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 297] ioctl(3, LOOP_CLR_FD) = 0 [pid 297] close(3) = 0 [pid 297] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 924 [pid 922] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 922] ioctl(4, LOOP_CLR_FD) = 0 [pid 920] <... write resumed>) = 1048576 [pid 922] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 922] close(4) = 0 [pid 922] close(3 [pid 923] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 918] +++ exited with 0 +++ [pid 298] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=918, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 298] restart_syscall(<... resuming interrupted clone ...> [pid 920] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 922] <... close resumed>) = 0 [pid 920] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 920] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 920] ioctl(4, LOOP_CLR_FD) = 0 [pid 922] chdir("./file0") = 0 [pid 922] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 920] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 920] close(4) = 0 [pid 298] <... restart_syscall resumed>) = 0 [pid 298] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 298] ioctl(3, LOOP_CLR_FD) = 0 [pid 298] close(3) = 0 [pid 298] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 925 [pid 920] close(3./strace-static-x86_64: Process 924 attached [pid 924] set_robust_list(0x55555671f660, 24) = 0 [pid 924] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 924] setpgid(0, 0 [pid 922] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 924] <... setpgid resumed>) = 0 [pid 924] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 922] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 924] write(3, "1000", 4) = 4 [pid 924] close(3) = 0 [pid 924] write(1, "executing program\n", 18 [pid 920] <... close resumed>) = 0 executing program [pid 924] <... write resumed>) = 18 [pid 924] memfd_create("syzkaller", 0 [pid 922] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 924] <... memfd_create resumed>) = 3 [pid 924] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 922] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 922] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 922] exit_group(0) = ? ./strace-static-x86_64: Process 925 attached [pid 920] chdir("./file0") = 0 [pid 920] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000 [pid 925] set_robust_list(0x55555671f660, 24) = 0 [pid 922] +++ exited with 0 +++ [pid 295] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=922, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 295] restart_syscall(<... resuming interrupted clone ...> [pid 920] <... open resumed>) = 3 [pid 295] <... restart_syscall resumed>) = 0 [pid 295] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 295] ioctl(3, LOOP_CLR_FD) = 0 [pid 295] close(3) = 0 [pid 295] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 925] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 923] <... write resumed>) = 1048576 [pid 295] <... clone resumed>, child_tidptr=0x55555671f650) = 926 [pid 925] <... prctl resumed>) = 0 [pid 920] mount("/dev/loop4", "./bus", NULL, MS_BIND, NULL [pid 925] setpgid(0, 0) = 0 [pid 925] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 920] <... mount resumed>) = 0 [pid 920] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC [pid 925] <... openat resumed>) = 3 [pid 925] write(3, "1000", 4 [pid 920] <... open resumed>) = 4 [pid 925] <... write resumed>) = 4 [pid 920] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 925] close(3 [pid 924] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 925] <... close resumed>) = 0 [pid 925] write(1, "executing program\n", 18 [pid 923] munmap(0x7f1ddd1fa000, 138412032executing program [pid 925] <... write resumed>) = 18 [pid 920] <... mmap resumed>) = 0x20000000 [pid 920] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 925] memfd_create("syzkaller", 0 [pid 920] <... openat resumed>) = 5 [pid 920] mount(NULL, 0x20002ac0, NULL, 0, NULL) = -1 ENOENT (No such file or directory) [pid 920] exit_group(0) = ? [pid 925] <... memfd_create resumed>) = 3 [pid 923] <... munmap resumed>) = 0 [pid 925] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0./strace-static-x86_64: Process 926 attached [pid 926] set_robust_list(0x55555671f660, 24) = 0 [pid 925] <... mmap resumed>) = 0x7f1ddd1fa000 [pid 926] prctl(PR_SET_PDEATHSIG, SIGKILLexecuting program ) = 0 [pid 926] setpgid(0, 0) = 0 [pid 926] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 920] +++ exited with 0 +++ [pid 299] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=920, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 299] restart_syscall(<... resuming interrupted clone ...> [pid 926] write(3, "1000", 4) = 4 [pid 926] close(3) = 0 [pid 926] write(1, "executing program\n", 18) = 18 [pid 926] memfd_create("syzkaller", 0 [pid 299] <... restart_syscall resumed>) = 0 [pid 299] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 [pid 299] ioctl(3, LOOP_CLR_FD) = 0 [pid 299] close(3) = 0 [pid 299] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555671f650) = 927 [pid 926] <... memfd_create resumed>) = 3 [pid 926] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 925] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 923] openat(AT_FDCWD, "/dev/loop1", O_RDWR./strace-static-x86_64: Process 927 attached [pid 927] set_robust_list(0x55555671f660, 24) = 0 [pid 927] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 927] setpgid(0, 0 [pid 923] <... openat resumed>) = 4 [pid 927] <... setpgid resumed>) = 0 [pid 927] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 923] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 927] <... openat resumed>) = 3 [pid 927] write(3, "1000", 4) = 4 [pid 927] close(3) = 0 [pid 927] write(1, "executing program\n", 18 [pid 923] ioctl(4, LOOP_CLR_FDexecuting program [pid 927] <... write resumed>) = 18 [pid 927] memfd_create("syzkaller", 0 [pid 923] <... ioctl resumed>) = 0 [pid 927] <... memfd_create resumed>) = 3 [pid 927] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1ddd1fa000 [pid 923] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 923] close(4) = 0 [pid 923] close(3) = 0 [pid 923] chdir("./file0") = 0 [pid 923] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_NOFOLLOW|O_NOATIME, 000) = 3 [pid 923] mount("/dev/loop1", "./bus", NULL, MS_BIND, NULL) = 0 [pid 923] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 4 [pid 923] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0) = 0x20000000 [pid 924] <... write resumed>) = 1048576 [pid 926] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576 [pid 924] munmap(0x7f1ddd1fa000, 138412032) = 0 [pid 924] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 924] ioctl(4, LOOP_SET_FD, 3 [pid 925] <... write resumed>) = 1048576 [pid 924] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 924] ioctl(4, LOOP_CLR_FD) = 0 [pid 923] openat(AT_FDCWD, 0x20002080, O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 5 [pid 923] mount(NULL, 0x20002ac0, NULL, 0, NULL [pid 924] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 924] close(4) = 0 [pid 924] close(3 [pid 923] <... mount resumed>) = -1 ENOENT (No such file or directory) [pid 923] exit_group(0) = ? [pid 923] +++ exited with 0 +++ [pid 296] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=923, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 296] restart_syscall(<... resuming interrupted clone ...> [pid 926] <... write resumed>) = 1048576 [pid 925] munmap(0x7f1ddd1fa000, 138412032) = 0