./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1056268752 <...> Warning: Permanently added '10.128.0.101' (ECDSA) to the list of known hosts. execve("./syz-executor1056268752", ["./syz-executor1056268752"], 0x7ffd0abffd40 /* 10 vars */) = 0 brk(NULL) = 0x555555cfa000 brk(0x555555cfac40) = 0x555555cfac40 arch_prctl(ARCH_SET_FS, 0x555555cfa300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1056268752", 4096) = 28 brk(0x555555d1bc40) = 0x555555d1bc40 brk(0x555555d1c000) = 0x555555d1c000 mprotect(0x7fdd1d84a000, 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./strace-static-x86_64: Process 3640 attached , child_tidptr=0x555555cfa5d0) = 3640 [pid 3639] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3640] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 3639] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3641 [pid 3639] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3641 attached [pid 3640] <... openat resumed>) = 3 [pid 3640] ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) [pid 3639] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3642 [pid 3639] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3640] close(3./strace-static-x86_64: Process 3642 attached [pid 3641] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3640] <... close resumed>) = 0 [pid 3640] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3641] <... openat resumed>) = 3 [pid 3641] ioctl(3, LOOP_CLR_FD [pid 3640] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3643 [pid 3641] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 3641] close(3) = 0 [pid 3641] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555cfa5d0) = 3645 [pid 3639] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3644 [pid 3639] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3642] openat(AT_FDCWD, "/dev/loop2", O_RDWR./strace-static-x86_64: Process 3643 attached [pid 3643] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3643] setpgid(0, 0) = 0 [pid 3642] <... openat resumed>) = 3 [pid 3642] ioctl(3, LOOP_CLR_FD [pid 3643] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3642] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 3639] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3646 ./strace-static-x86_64: Process 3646 attached [pid 3639] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3643] <... openat resumed>) = 3 [pid 3642] close(3) = 0 [pid 3642] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3645 attached [pid 3645] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3643] write(3, "1000", 4) = 4 [pid 3643] close(3 [pid 3645] <... prctl resumed>) = 0 [pid 3643] <... close resumed>) = 0 [pid 3645] setpgid(0, 0) = 0 [pid 3639] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3647 [pid 3645] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3642] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3648 [pid 3643] memfd_create("syzkaller", 0./strace-static-x86_64: Process 3644 attached ) = 3 [pid 3646] openat(AT_FDCWD, "/dev/loop4", O_RDWR./strace-static-x86_64: Process 3648 attached [pid 3645] <... openat resumed>) = 3 [pid 3646] <... openat resumed>) = 3 [pid 3643] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3646] ioctl(3, LOOP_CLR_FD [pid 3643] <... mmap resumed>) = 0x7fdd15200000 [pid 3648] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3646] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 3644] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3645] write(3, "1000", 4 [pid 3648] setpgid(0, 0 [pid 3646] close(3 [pid 3648] <... setpgid resumed>) = 0 [pid 3646] <... close resumed>) = 0 [pid 3643] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3645] <... write resumed>) = 4 [pid 3645] close(3) = 0 [pid 3646] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3645] memfd_create("syzkaller", 0) = 3 [pid 3644] <... openat resumed>) = 3 [pid 3645] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3646] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3650 [pid 3648] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3645] <... mmap resumed>) = 0x7fdd15200000 [pid 3648] <... openat resumed>) = 3 [pid 3645] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3644] ioctl(3, LOOP_CLR_FD [pid 3648] write(3, "1000", 4./strace-static-x86_64: Process 3650 attached ) = 4 [pid 3644] <... ioctl resumed>) = -1 ENXIO (No such device or address) ./strace-static-x86_64: Process 3647 attached [pid 3648] close(3 [pid 3644] close(3 [pid 3648] <... close resumed>) = 0 [pid 3650] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3648] memfd_create("syzkaller", 0 [pid 3647] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 3644] <... close resumed>) = 0 [pid 3645] <... write resumed>) = 262144 [pid 3650] <... prctl resumed>) = 0 [pid 3648] <... memfd_create resumed>) = 3 [pid 3647] <... openat resumed>) = 3 [pid 3644] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3643] <... write resumed>) = 262144 ./strace-static-x86_64: Process 3651 attached [pid 3650] setpgid(0, 0 [pid 3648] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3647] ioctl(3, LOOP_CLR_FD [pid 3651] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3650] <... setpgid resumed>) = 0 [pid 3648] <... mmap resumed>) = 0x7fdd15200000 [pid 3647] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 3644] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3651 [pid 3643] munmap(0x7fdd15200000, 262144 [pid 3650] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3647] close(3 [pid 3645] munmap(0x7fdd15200000, 262144 [pid 3643] <... munmap resumed>) = 0 [pid 3648] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3647] <... close resumed>) = 0 [pid 3645] <... munmap resumed>) = 0 [pid 3643] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 3650] <... openat resumed>) = 3 [pid 3647] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3650] write(3, "1000", 4 [pid 3645] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3643] <... openat resumed>) = 4 ./strace-static-x86_64: Process 3652 attached [pid 3651] <... prctl resumed>) = 0 [pid 3650] <... write resumed>) = 4 [pid 3648] <... write resumed>) = 262144 [pid 3647] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3652 [pid 3645] <... openat resumed>) = 4 [pid 3643] ioctl(4, LOOP_SET_FD, 3 [pid 3652] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3651] setpgid(0, 0 [pid 3650] close(3 [pid 3648] munmap(0x7fdd15200000, 262144 [pid 3645] ioctl(4, LOOP_SET_FD, 3 [pid 3652] <... prctl resumed>) = 0 [pid 3651] <... setpgid resumed>) = 0 [pid 3650] <... close resumed>) = 0 [pid 3648] <... munmap resumed>) = 0 [pid 3652] setpgid(0, 0 [pid 3651] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3650] memfd_create("syzkaller", 0 [pid 3648] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 3652] <... setpgid resumed>) = 0 [pid 3651] <... openat resumed>) = 3 [pid 3650] <... memfd_create resumed>) = 3 [pid 3648] <... openat resumed>) = 4 [pid 3652] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3651] write(3, "1000", 4 [pid 3650] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3648] ioctl(4, LOOP_SET_FD, 3 [pid 3652] <... openat resumed>) = 3 [pid 3651] <... write resumed>) = 4 [pid 3650] <... mmap resumed>) = 0x7fdd15200000 [pid 3648] <... ioctl resumed>) = 0 [pid 3645] <... ioctl resumed>) = 0 [pid 3643] <... ioctl resumed>) = 0 [pid 3652] write(3, "1000", 4 [pid 3651] close(3 [pid 3650] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3648] close(3 [pid 3645] close(3 [pid 3643] close(3 [pid 3652] <... write resumed>) = 4 [pid 3651] <... close resumed>) = 0 [pid 3650] <... write resumed>) = 262144 [pid 3648] <... close resumed>) = 0 [pid 3645] <... close resumed>) = 0 [pid 3643] <... close resumed>) = 0 [pid 3652] close(3 [pid 3651] memfd_create("syzkaller", 0 [pid 3650] munmap(0x7fdd15200000, 262144 [pid 3648] mkdir("./file0", 0777 [pid 3645] mkdir("./file0", 0777 [pid 3643] mkdir("./file0", 0777 [pid 3652] <... close resumed>) = 0 [pid 3651] <... memfd_create resumed>) = 3 [pid 3650] <... munmap resumed>) = 0 [pid 3648] <... mkdir resumed>) = 0 [pid 3645] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 3643] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 3652] memfd_create("syzkaller", 0 [pid 3651] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3650] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 3648] mount("/dev/loop2", "./file0", "ext4", 0, ",errors=continue" [pid 3645] mount("/dev/loop1", "./file0", "ext4", 0, ",errors=continue" [pid 3643] mount("/dev/loop0", "./file0", "ext4", 0, ",errors=continue" [pid 3652] <... memfd_create resumed>) = 3 [pid 3651] <... mmap resumed>) = 0x7fdd15200000 [pid 3650] <... openat resumed>) = 4 [ 50.846831][ T3643] loop0: detected capacity change from 0 to 512 [ 50.854820][ T3645] loop1: detected capacity change from 0 to 512 [ 50.857332][ T3648] loop2: detected capacity change from 0 to 512 [pid 3652] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3651] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3650] ioctl(4, LOOP_SET_FD, 3 [pid 3652] <... mmap resumed>) = 0x7fdd15200000 [pid 3651] <... write resumed>) = 262144 [pid 3652] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3651] munmap(0x7fdd15200000, 262144 [pid 3652] <... write resumed>) = 262144 [pid 3651] <... munmap resumed>) = 0 [pid 3650] <... ioctl resumed>) = 0 [pid 3652] munmap(0x7fdd15200000, 262144 [pid 3651] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3650] close(3 [pid 3652] <... munmap resumed>) = 0 [ 50.895897][ T3650] loop4: detected capacity change from 0 to 512 [ 50.920347][ T3645] EXT4-fs (loop1): mounted filesystem without journal. Quota mode: none. [ 50.929829][ T3648] EXT4-fs (loop2): mounted filesystem without journal. Quota mode: none. [pid 3651] <... openat resumed>) = 4 [pid 3650] <... close resumed>) = 0 [pid 3652] openat(AT_FDCWD, "/dev/loop5", O_RDWR [pid 3651] ioctl(4, LOOP_SET_FD, 3 [pid 3650] mkdir("./file0", 0777 [pid 3645] <... mount resumed>) = 0 [pid 3645] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 3652] <... openat resumed>) = 4 [pid 3651] <... ioctl resumed>) = 0 [pid 3650] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 3648] <... mount resumed>) = 0 [pid 3643] <... mount resumed>) = 0 [pid 3645] <... openat resumed>) = 3 [pid 3652] ioctl(4, LOOP_SET_FD, 3 [pid 3651] close(3 [pid 3650] mount("/dev/loop4", "./file0", "ext4", 0, ",errors=continue" [pid 3648] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 3643] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 3645] chdir("./file0") = 0 [pid 3645] ioctl(4, LOOP_CLR_FD) = 0 [pid 3645] close(4 [pid 3652] <... ioctl resumed>) = 0 [pid 3651] <... close resumed>) = 0 [pid 3648] <... openat resumed>) = 3 [pid 3645] <... close resumed>) = 0 [pid 3643] <... openat resumed>) = 3 [pid 3645] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3652] close(3 [pid 3651] mkdir("./file0", 0777 [pid 3648] chdir("./file0" [pid 3645] <... openat resumed>) = 4 [pid 3643] chdir("./file0" [pid 3652] <... close resumed>) = 0 [pid 3651] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 3650] <... mount resumed>) = 0 [pid 3648] <... chdir resumed>) = 0 [pid 3643] <... chdir resumed>) = 0 [pid 3652] mkdir("./file0", 0777 [pid 3651] mount("/dev/loop3", "./file0", "ext4", 0, ",errors=continue" [pid 3650] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 3648] ioctl(4, LOOP_CLR_FD [pid 3652] <... mkdir resumed>) = -1 EEXIST (File exists) [pid 3650] <... openat resumed>) = 3 [pid 3648] <... ioctl resumed>) = 0 [pid 3643] ioctl(4, LOOP_CLR_FD [pid 3650] chdir("./file0") = 0 [pid 3652] mount("/dev/loop5", "./file0", "ext4", 0, ",errors=continue" [pid 3650] ioctl(4, LOOP_CLR_FD [pid 3648] close(4 [pid 3645] ioctl(4, FS_IOC_GETFSMAP, 0x20000200 [pid 3643] <... ioctl resumed>) = 0 [pid 3650] <... ioctl resumed>) = 0 [pid 3650] close(4) = 0 [pid 3648] <... close resumed>) = 0 [pid 3643] close(4 [pid 3650] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [pid 3648] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3645] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3643] <... close resumed>) = 0 [pid 3650] ioctl(4, FS_IOC_GETFSMAP, 0x20000200) = -1 EINVAL (Invalid argument) [pid 3648] <... openat resumed>) = 4 [pid 3643] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3650] exit_group(0 [pid 3648] ioctl(4, FS_IOC_GETFSMAP, 0x20000200 [pid 3645] exit_group(0 [pid 3650] <... exit_group resumed>) = ? [ 50.939298][ T3643] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. [ 50.948354][ T3651] loop3: detected capacity change from 0 to 512 [ 50.961260][ T3652] loop5: detected capacity change from 0 to 512 [ 50.972461][ T3650] EXT4-fs (loop4): mounted filesystem without journal. Quota mode: none. [pid 3643] <... openat resumed>) = 4 [pid 3650] +++ exited with 0 +++ [pid 3648] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3645] <... exit_group resumed>) = ? [pid 3651] <... mount resumed>) = 0 [pid 3648] exit_group(0 [pid 3646] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3650, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- [pid 3643] ioctl(4, FS_IOC_GETFSMAP, 0x20000200 [pid 3651] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 3648] <... exit_group resumed>) = ? [pid 3643] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3651] <... openat resumed>) = 3 [pid 3648] +++ exited with 0 +++ [pid 3643] exit_group(0 [pid 3651] chdir("./file0" [pid 3646] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 3645] +++ exited with 0 +++ [pid 3643] <... exit_group resumed>) = ? [pid 3651] <... chdir resumed>) = 0 [pid 3646] <... openat resumed>) = 3 [pid 3643] +++ exited with 0 +++ [pid 3642] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3648, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 3641] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3645, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 3651] ioctl(4, LOOP_CLR_FD [pid 3646] ioctl(3, LOOP_CLR_FD [pid 3642] restart_syscall(<... resuming interrupted clone ...> [pid 3641] restart_syscall(<... resuming interrupted clone ...> [pid 3640] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3643, si_uid=0, si_status=0, si_utime=0, si_stime=3} --- [pid 3651] <... ioctl resumed>) = 0 [pid 3646] <... ioctl resumed>) = 0 [pid 3642] <... restart_syscall resumed>) = 0 [pid 3641] <... restart_syscall resumed>) = 0 [pid 3651] close(4 [pid 3646] close(3 [pid 3651] <... close resumed>) = 0 [pid 3646] <... close resumed>) = 0 [pid 3640] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 3651] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3646] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3642] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 3641] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3640] <... openat resumed>) = 3 ./strace-static-x86_64: Process 3662 attached [pid 3642] <... openat resumed>) = 3 [pid 3640] ioctl(3, LOOP_CLR_FD [pid 3651] <... openat resumed>) = 4 [pid 3646] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3662 [pid 3642] ioctl(3, LOOP_CLR_FD [pid 3641] <... openat resumed>) = 3 [pid 3640] <... ioctl resumed>) = 0 [pid 3651] ioctl(4, FS_IOC_GETFSMAP, 0x20000200 [pid 3642] <... ioctl resumed>) = 0 [pid 3641] ioctl(3, LOOP_CLR_FD [pid 3640] close(3 [pid 3651] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3642] close(3 [pid 3641] <... ioctl resumed>) = 0 [pid 3640] <... close resumed>) = 0 [pid 3642] <... close resumed>) = 0 [pid 3641] close(3 [pid 3640] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3662] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3651] exit_group(0 [pid 3642] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3641] <... close resumed>) = 0 [pid 3662] <... prctl resumed>) = 0 [pid 3651] <... exit_group resumed>) = ? [pid 3640] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3663 [pid 3641] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3642] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3664 [pid 3652] <... mount resumed>) = 0 [pid 3652] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 3641] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3665 [pid 3652] chdir("./file0") = 0 [pid 3652] ioctl(4, LOOP_CLR_FD [pid 3662] setpgid(0, 0) = 0 [pid 3652] <... ioctl resumed>) = 0 [pid 3652] close(4 [pid 3651] +++ exited with 0 +++ [pid 3652] <... close resumed>) = 0 [pid 3662] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3652] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3662] <... openat resumed>) = 3 [pid 3652] <... openat resumed>) = 4 [pid 3644] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3651, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- ./strace-static-x86_64: Process 3664 attached [pid 3662] write(3, "1000", 4 [pid 3652] ioctl(4, FS_IOC_GETFSMAP, 0x20000200 [pid 3644] restart_syscall(<... resuming interrupted clone ...> [ 51.001931][ T3651] EXT4-fs (loop3): mounted filesystem without journal. Quota mode: none. [ 51.012096][ T3652] EXT4-fs (loop5): mounted filesystem without journal. Quota mode: none. [pid 3664] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3644] <... restart_syscall resumed>) = 0 [pid 3662] <... write resumed>) = 4 ./strace-static-x86_64: Process 3665 attached ./strace-static-x86_64: Process 3663 attached [pid 3664] <... prctl resumed>) = 0 [pid 3664] setpgid(0, 0 [pid 3662] close(3 [pid 3665] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3664] <... setpgid resumed>) = 0 [pid 3662] <... close resumed>) = 0 [pid 3665] <... prctl resumed>) = 0 [pid 3664] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3663] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3665] setpgid(0, 0 [pid 3664] <... openat resumed>) = 3 [pid 3663] <... prctl resumed>) = 0 [pid 3662] memfd_create("syzkaller", 0 [pid 3644] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3664] write(3, "1000", 4 [pid 3644] <... openat resumed>) = 3 [pid 3665] <... setpgid resumed>) = 0 [pid 3664] <... write resumed>) = 4 [pid 3662] <... memfd_create resumed>) = 3 [pid 3665] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3664] close(3 [pid 3662] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3644] ioctl(3, LOOP_CLR_FD [pid 3664] <... close resumed>) = 0 [pid 3663] setpgid(0, 0 [pid 3662] <... mmap resumed>) = 0x7fdd15200000 [pid 3665] <... openat resumed>) = 3 [pid 3664] memfd_create("syzkaller", 0 [pid 3663] <... setpgid resumed>) = 0 [pid 3644] <... ioctl resumed>) = 0 [pid 3664] <... memfd_create resumed>) = 3 [pid 3664] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdd15200000 [pid 3665] write(3, "1000", 4 [pid 3664] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3663] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3662] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3644] close(3 [pid 3665] <... write resumed>) = 4 [pid 3664] <... write resumed>) = 262144 [pid 3663] <... openat resumed>) = 3 [pid 3662] <... write resumed>) = 262144 [pid 3665] close(3 [pid 3664] munmap(0x7fdd15200000, 262144 [pid 3663] write(3, "1000", 4 [pid 3644] <... close resumed>) = 0 [pid 3665] <... close resumed>) = 0 [pid 3664] <... munmap resumed>) = 0 [pid 3663] <... write resumed>) = 4 [pid 3662] munmap(0x7fdd15200000, 262144 [pid 3644] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3665] memfd_create("syzkaller", 0 [pid 3664] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 3663] close(3 [pid 3664] <... openat resumed>) = 4 [pid 3664] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 3664] ioctl(4, LOOP_CLR_FD [pid 3665] <... memfd_create resumed>) = 3 [pid 3664] <... ioctl resumed>) = 0 [pid 3663] <... close resumed>) = 0 [pid 3644] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3666 [pid 3665] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3663] memfd_create("syzkaller", 0 [pid 3665] <... mmap resumed>) = 0x7fdd15200000 [pid 3663] <... memfd_create resumed>) = 3 ./strace-static-x86_64: Process 3666 attached [pid 3665] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3663] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3662] <... munmap resumed>) = 0 [pid 3664] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 3664] close(4) = 0 [pid 3664] close(3 [pid 3665] <... write resumed>) = 262144 [pid 3664] <... close resumed>) = 0 [pid 3663] <... mmap resumed>) = 0x7fdd15200000 [pid 3662] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 3664] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3662] <... openat resumed>) = 4 [pid 3664] <... openat resumed>) = 3 [pid 3663] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3662] ioctl(4, LOOP_SET_FD, 3 [pid 3665] munmap(0x7fdd15200000, 262144 [pid 3664] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3662] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3664] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3662] ioctl(4, LOOP_CLR_FD [pid 3664] exit_group(0) = ? [pid 3662] <... ioctl resumed>) = 0 [pid 3665] <... munmap resumed>) = 0 [pid 3664] +++ exited with 0 +++ [pid 3665] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3642] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3664, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3665] <... openat resumed>) = 4 [pid 3642] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 3665] ioctl(4, LOOP_SET_FD, 3 [pid 3662] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [ 51.046098][ T3652] ------------[ cut here ]------------ [ 51.069676][ T3652] kernel BUG at fs/ext4/ext4.h:3329! [ 51.088268][ T3652] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [pid 3666] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3665] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3663] <... write resumed>) = 262144 [pid 3662] close(4 [pid 3666] <... prctl resumed>) = 0 [ 51.094379][ T3652] CPU: 0 PID: 3652 Comm: syz-executor105 Not tainted 6.1.0-rc7-syzkaller #0 [ 51.103094][ T3652] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 51.113155][ T3652] RIP: 0010:ext4_get_group_info+0x34d/0x350 [ 51.119079][ T3652] Code: 51 ff 8b 74 24 04 48 c7 c7 80 a2 2b 8d 4c 89 f2 e8 78 70 30 02 43 80 3c 2c 00 0f 85 6d fd ff ff e9 70 fd ff ff e8 93 10 51 ff <0f> 0b 90 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00 00 00 00 fc [ 51.138704][ T3652] RSP: 0018:ffffc90003ddf268 EFLAGS: 00010293 [pid 3665] ioctl(4, LOOP_CLR_FD [pid 3663] munmap(0x7fdd15200000, 262144 [pid 3662] <... close resumed>) = 0 [pid 3642] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 3666] setpgid(0, 0 [pid 3665] <... ioctl resumed>) = 0 [pid 3663] <... munmap resumed>) = 0 [pid 3662] close(3 [pid 3642] <... openat resumed>) = 3 [pid 3666] <... setpgid resumed>) = 0 [ 51.144789][ T3652] RAX: ffffffff8239875d RBX: 0000000000000001 RCX: ffff8880229e57c0 [ 51.152773][ T3652] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 51.160755][ T3652] RBP: 0000000000000001 R08: ffffffff82398478 R09: ffffc90003ddf7a0 [ 51.168735][ T3652] R10: fffffbfff1cebe0e R11: 1ffffffff1cebe0d R12: 1ffff1100f4f9ccf [ 51.176716][ T3652] R13: dffffc0000000000 R14: ffff888021ef8000 R15: ffff88807a7ce678 [ 51.184696][ T3652] FS: 0000555555cfa300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 51.193637][ T3652] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.200227][ T3652] CR2: 00007fdd1d81f538 CR3: 0000000076607000 CR4: 00000000003506f0 [ 51.208210][ T3652] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.216192][ T3652] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.224175][ T3652] Call Trace: [ 51.227456][ T3652] [ 51.230408][ T3652] ext4_mb_load_buddy_gfp+0xc5/0x1900 [ 51.235815][ T3652] ? do_raw_spin_unlock+0x134/0x8a0 [ 51.241113][ T3652] ext4_mballoc_query_range+0xb0/0x800 [ 51.246594][ T3652] ? trace_ext4_fsmap_high_key+0x340/0x340 [ 51.252412][ T3652] ? ext4_trim_fs+0x1450/0x1450 [ 51.257277][ T3652] ? rcu_read_lock_sched_held+0x87/0x110 [ 51.262928][ T3652] ? trace_ext4_fsmap_high_key+0x110/0x340 [ 51.268752][ T3652] ext4_getfsmap_datadev+0x1bb0/0x2580 [ 51.274237][ T3652] ? ext4_getfsmap+0x1070/0x1070 [ 51.279190][ T3652] ? ext4_getfsmap+0xb51/0x1070 [ 51.284055][ T3652] ? ext4_getfsmap+0x1070/0x1070 [ 51.288997][ T3652] ext4_getfsmap+0xd22/0x1070 [ 51.293705][ T3652] ? ext4_fsmap_to_internal+0x2d0/0x2d0 [ 51.299267][ T3652] ? ext4_getfsmap+0x1070/0x1070 [ 51.304217][ T3652] ? trace_ext4_getfsmap_high_key+0x2f0/0x2f0 [ 51.310300][ T3652] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 51.316289][ T3652] ? __might_fault+0xb2/0x110 [ 51.320977][ T3652] ext4_ioctl+0x3ad0/0x5430 [ 51.325497][ T3652] ? do_syscall_64+0x3d/0xb0 [ 51.330118][ T3652] ? ext4_fileattr_set+0x17f0/0x17f0 [ 51.335415][ T3652] ? rcu_read_lock_sched_held+0x87/0x110 [ 51.341059][ T3652] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 51.347060][ T3652] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 51.352994][ T3652] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 51.359003][ T3652] ? rcu_lock_release+0x5/0x20 [ 51.363815][ T3652] ? do_vfs_ioctl+0x1a40/0x29a0 [ 51.368680][ T3652] ? __x64_compat_sys_ioctl+0x80/0x80 [ 51.374079][ T3652] ? __lock_acquire+0x1f60/0x1f60 [ 51.379111][ T3652] ? slab_free_freelist_hook+0x12e/0x1a0 [ 51.384771][ T3652] ? __kmem_cache_free+0x71/0x110 [ 51.389837][ T3652] ? do_notify_parent+0xe00/0xe00 [ 51.394878][ T3652] ? bpf_lsm_file_ioctl+0x5/0x10 [ 51.399829][ T3652] ? security_file_ioctl+0x9d/0xb0 [ 51.404965][ T3652] ? ext4_fileattr_set+0x17f0/0x17f0 [ 51.410265][ T3652] __se_sys_ioctl+0xfb/0x170 [ 51.414868][ T3652] do_syscall_64+0x3d/0xb0 [ 51.419293][ T3652] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 51.425195][ T3652] RIP: 0033:0x7fdd1d7dc3e9 [ 51.429615][ T3652] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 14 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 c0 ff ff ff f7 d8 64 89 01 48 [ 51.449230][ T3652] RSP: 002b:00007ffdb2992548 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 51.457672][ T3652] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fdd1d7dc3e9 [ 51.465659][ T3652] RDX: 0000000020000200 RSI: 00000000c0c0583b RDI: 0000000000000004 [ 51.473643][ T3652] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 51.481627][ T3652] R10: 00000000000003f1 R11: 0000000000000246 R12: 00007fdd1d79b5c0 [ 51.489607][ T3652] R13: 00007ffdb2992570 R14: 00007ffdb299255c R15: 00007ffdb2992560 [pid 3663] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 3662] <... close resumed>) = 0 [pid 3642] ioctl(3, LOOP_CLR_FD [pid 3666] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3663] <... openat resumed>) = 4 [pid 3662] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3642] <... ioctl resumed>) = 0 [pid 3666] <... openat resumed>) = 3 [pid 3663] ioctl(4, LOOP_SET_FD, 3 [pid 3662] <... openat resumed>) = 3 [pid 3642] close(3 [pid 3666] write(3, "1000", 4 [pid 3665] ioctl(4, LOOP_SET_FD, 3 [pid 3663] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3662] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3642] <... close resumed>) = 0 [pid 3666] <... write resumed>) = 4 [pid 3665] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3663] ioctl(4, LOOP_CLR_FD [pid 3662] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3642] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3666] close(3 [pid 3665] close(4 [pid 3663] <... ioctl resumed>) = 0 [pid 3662] exit_group(0 [pid 3666] <... close resumed>) = 0 [pid 3665] <... close resumed>) = 0 [pid 3662] <... exit_group resumed>) = ? [pid 3642] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3670 [pid 3666] memfd_create("syzkaller", 0 [pid 3665] close(3 [pid 3662] +++ exited with 0 +++ [pid 3666] <... memfd_create resumed>) = 3 [pid 3665] <... close resumed>) = 0 [pid 3663] ioctl(4, LOOP_SET_FD, 3 [pid 3666] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3665] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3663] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3666] <... mmap resumed>) = 0x7fdd15200000 [pid 3665] <... openat resumed>) = 3 [pid 3663] close(4 [pid 3666] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3665] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3663] <... close resumed>) = 0 [pid 3666] <... write resumed>) = 262144 [pid 3665] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3663] close(3 [pid 3666] munmap(0x7fdd15200000, 262144 [pid 3665] exit_group(0 [pid 3663] <... close resumed>) = 0 [pid 3666] <... munmap resumed>) = 0 [pid 3665] <... exit_group resumed>) = ? [pid 3663] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000./strace-static-x86_64: Process 3670 attached [pid 3666] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3665] +++ exited with 0 +++ [pid 3663] <... openat resumed>) = 3 [pid 3670] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3666] <... openat resumed>) = 4 [pid 3663] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3670] <... prctl resumed>) = 0 [pid 3666] ioctl(4, LOOP_SET_FD, 3 [pid 3663] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3641] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3665, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3670] setpgid(0, 0 [pid 3666] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3663] exit_group(0 [pid 3641] restart_syscall(<... resuming interrupted clone ...> [pid 3670] <... setpgid resumed>) = 0 [pid 3666] ioctl(4, LOOP_CLR_FD [pid 3663] <... exit_group resumed>) = ? [pid 3641] <... restart_syscall resumed>) = 0 [pid 3670] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3666] <... ioctl resumed>) = 0 [pid 3663] +++ exited with 0 +++ [pid 3670] <... openat resumed>) = 3 [pid 3670] write(3, "1000", 4 [pid 3641] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3670] <... write resumed>) = 4 [pid 3641] <... openat resumed>) = 3 [pid 3670] close(3 [pid 3641] ioctl(3, LOOP_CLR_FD [pid 3670] <... close resumed>) = 0 [pid 3641] <... ioctl resumed>) = 0 [pid 3670] memfd_create("syzkaller", 0 [pid 3666] ioctl(4, LOOP_SET_FD, 3 [pid 3641] close(3 [pid 3670] <... memfd_create resumed>) = 3 [pid 3666] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3641] <... close resumed>) = 0 [pid 3670] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3666] close(4 [pid 3641] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3670] <... mmap resumed>) = 0x7fdd15200000 [pid 3666] <... close resumed>) = 0 [pid 3670] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3666] close(3 [pid 3641] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3671 [pid 3670] <... write resumed>) = 262144 [pid 3666] <... close resumed>) = 0 [pid 3666] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 3 [pid 3666] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3670] munmap(0x7fdd15200000, 262144 [pid 3666] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3666] exit_group(0) = ? [pid 3666] +++ exited with 0 +++ [pid 3670] <... munmap resumed>) = 0 [pid 3644] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3666, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3670] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 3670] ioctl(4, LOOP_SET_FD, 3 [pid 3644] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3670] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3644] <... openat resumed>) = 3 [pid 3670] ioctl(4, LOOP_CLR_FD [pid 3644] ioctl(3, LOOP_CLR_FD [pid 3670] <... ioctl resumed>) = 0 [pid 3644] <... ioctl resumed>) = 0 [pid 3644] close(3) = 0 [pid 3644] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3671 attached [pid 3671] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3670] ioctl(4, LOOP_SET_FD, 3 [pid 3644] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3672 [pid 3671] <... prctl resumed>) = 0 [pid 3670] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3671] setpgid(0, 0 [pid 3670] close(4 [pid 3671] <... setpgid resumed>) = 0 [pid 3670] <... close resumed>) = 0 [pid 3671] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3670] close(3 [pid 3671] <... openat resumed>) = 3 [pid 3670] <... close resumed>) = 0 [pid 3671] write(3, "1000", 4 [pid 3670] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3671] <... write resumed>) = 4 [pid 3670] <... openat resumed>) = 3 [pid 3671] close(3 [pid 3670] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3671] <... close resumed>) = 0 [pid 3670] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3671] memfd_create("syzkaller", 0 [pid 3670] exit_group(0 [pid 3671] <... memfd_create resumed>) = 3 [pid 3670] <... exit_group resumed>) = ? [pid 3671] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3670] +++ exited with 0 +++ [pid 3671] <... mmap resumed>) = 0x7fdd15200000 [pid 3642] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3670, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- [pid 3671] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144) = 262144 [pid 3642] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 3642] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 3672 attached ) = 0 [pid 3672] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3642] close(3) = 0 [pid 3672] <... prctl resumed>) = 0 [pid 3642] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3672] setpgid(0, 0) = 0 [pid 3642] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3673 [pid 3672] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 3672] write(3, "1000", 4 [pid 3671] munmap(0x7fdd15200000, 262144 [pid 3672] <... write resumed>) = 4 [pid 3672] close(3) = 0 [pid 3671] <... munmap resumed>) = 0 [pid 3672] memfd_create("syzkaller", 0 [pid 3671] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3672] <... memfd_create resumed>) = 3 [pid 3671] <... openat resumed>) = 4 [pid 3672] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3671] ioctl(4, LOOP_SET_FD, 3 [pid 3672] <... mmap resumed>) = 0x7fdd15200000 [pid 3671] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3672] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3671] ioctl(4, LOOP_CLR_FD) = 0 [pid 3671] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) ./strace-static-x86_64: Process 3673 attached [pid 3671] close(4 [pid 3673] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3671] <... close resumed>) = 0 [pid 3673] <... prctl resumed>) = 0 [pid 3671] close(3 [pid 3673] setpgid(0, 0) = 0 [pid 3671] <... close resumed>) = 0 [pid 3673] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3671] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3673] <... openat resumed>) = 3 [pid 3672] <... write resumed>) = 262144 [pid 3671] <... openat resumed>) = 3 [pid 3673] write(3, "1000", 4 [pid 3672] munmap(0x7fdd15200000, 262144 [pid 3671] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3673] <... write resumed>) = 4 [pid 3672] <... munmap resumed>) = 0 [pid 3671] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3673] close(3 [pid 3671] exit_group(0 [pid 3673] <... close resumed>) = 0 [pid 3672] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3671] <... exit_group resumed>) = ? [pid 3673] memfd_create("syzkaller", 0 [pid 3672] <... openat resumed>) = 4 [pid 3671] +++ exited with 0 +++ [pid 3673] <... memfd_create resumed>) = 3 [pid 3672] ioctl(4, LOOP_SET_FD, 3 [pid 3641] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3671, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3673] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3672] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3673] <... mmap resumed>) = 0x7fdd15200000 [pid 3672] ioctl(4, LOOP_CLR_FD [pid 3673] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3672] <... ioctl resumed>) = 0 [pid 3641] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 3641] ioctl(3, LOOP_CLR_FD) = 0 [pid 3641] close(3) = 0 [pid 3641] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3672] ioctl(4, LOOP_SET_FD, 3 [pid 3673] <... write resumed>) = 262144 [pid 3672] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3641] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3674 [pid 3672] close(4) = 0 [pid 3672] close(3 [pid 3673] munmap(0x7fdd15200000, 262144 [pid 3672] <... close resumed>) = 0 [pid 3673] <... munmap resumed>) = 0 [pid 3672] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 3 [pid 3673] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 3672] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3673] <... openat resumed>) = 4 [pid 3672] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3673] ioctl(4, LOOP_SET_FD, 3 [pid 3672] exit_group(0 [pid 3673] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3672] <... exit_group resumed>) = ? [pid 3673] ioctl(4, LOOP_CLR_FD [pid 3672] +++ exited with 0 +++ [pid 3673] <... ioctl resumed>) = 0 [pid 3644] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3672, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- ./strace-static-x86_64: Process 3674 attached [pid 3674] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3644] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3674] setpgid(0, 0 [pid 3644] <... openat resumed>) = 3 [pid 3674] <... setpgid resumed>) = 0 [pid 3673] ioctl(4, LOOP_SET_FD, 3 [pid 3644] ioctl(3, LOOP_CLR_FD [pid 3674] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3673] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3644] <... ioctl resumed>) = 0 [pid 3674] <... openat resumed>) = 3 [pid 3673] close(4 [pid 3644] close(3 [pid 3674] write(3, "1000", 4 [pid 3673] <... close resumed>) = 0 [pid 3644] <... close resumed>) = 0 [pid 3674] <... write resumed>) = 4 [pid 3673] close(3 [pid 3644] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3674] close(3 [pid 3673] <... close resumed>) = 0 [pid 3674] <... close resumed>) = 0 [pid 3673] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3644] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3675 [pid 3674] memfd_create("syzkaller", 0 [pid 3673] <... openat resumed>) = 3 [pid 3674] <... memfd_create resumed>) = 3 [pid 3673] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3674] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3673] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3674] <... mmap resumed>) = 0x7fdd15200000 [pid 3673] exit_group(0 [pid 3674] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3673] <... exit_group resumed>) = ? [pid 3674] <... write resumed>) = 262144 [pid 3673] +++ exited with 0 +++ [pid 3642] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3673, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3642] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 3646] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3662, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3642] <... openat resumed>) = 3 [pid 3640] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3663, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3646] restart_syscall(<... resuming interrupted clone ...> [pid 3642] ioctl(3, LOOP_CLR_FD [pid 3640] restart_syscall(<... resuming interrupted clone ...> [pid 3646] <... restart_syscall resumed>) = 0 [pid 3642] <... ioctl resumed>) = 0 [pid 3640] <... restart_syscall resumed>) = 0 [pid 3674] munmap(0x7fdd15200000, 262144 [pid 3642] close(3./strace-static-x86_64: Process 3675 attached ) = 0 [pid 3675] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3674] <... munmap resumed>) = 0 [pid 3646] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 3642] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3640] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 3675] <... prctl resumed>) = 0 [pid 3674] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3646] <... openat resumed>) = 3 [pid 3640] <... openat resumed>) = 3 [pid 3675] setpgid(0, 0 [pid 3674] <... openat resumed>) = 4 [pid 3646] ioctl(3, LOOP_CLR_FD [pid 3642] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3676 [pid 3640] ioctl(3, LOOP_CLR_FD [pid 3675] <... setpgid resumed>) = 0 [pid 3674] ioctl(4, LOOP_SET_FD, 3 [pid 3646] <... ioctl resumed>) = 0 [pid 3640] <... ioctl resumed>) = 0 [pid 3675] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3674] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3646] close(3 [pid 3640] close(3 [pid 3675] <... openat resumed>) = 3 [pid 3674] ioctl(4, LOOP_CLR_FD [pid 3646] <... close resumed>) = 0 [pid 3640] <... close resumed>) = 0 [pid 3675] write(3, "1000", 4 [pid 3674] <... ioctl resumed>) = 0 [pid 3646] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3640] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3675] <... write resumed>) = 4 [pid 3675] close(3 [pid 3646] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3677 [pid 3640] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3678 [pid 3675] <... close resumed>) = 0 [pid 3675] memfd_create("syzkaller", 0) = 3 [pid 3675] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3674] ioctl(4, LOOP_SET_FD, 3 [pid 3675] <... mmap resumed>) = 0x7fdd15200000 [pid 3674] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3675] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3674] close(4 [pid 3675] <... write resumed>) = 262144 [pid 3674] <... close resumed>) = 0 [pid 3674] close(3 [pid 3675] munmap(0x7fdd15200000, 262144 [pid 3674] <... close resumed>) = 0 [pid 3675] <... munmap resumed>) = 0 [pid 3674] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3675] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3674] <... openat resumed>) = 3 [pid 3675] <... openat resumed>) = 4 [pid 3674] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3675] ioctl(4, LOOP_SET_FD, 3 [pid 3674] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3675] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3674] exit_group(0 [pid 3675] ioctl(4, LOOP_CLR_FD [pid 3674] <... exit_group resumed>) = ? [pid 3675] <... ioctl resumed>) = 0 [pid 3674] +++ exited with 0 +++ [pid 3641] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3674, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3641] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 3675] ioctl(4, LOOP_SET_FD, 3 [pid 3641] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3675] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3641] <... openat resumed>) = 3 [pid 3675] close(4 [pid 3641] ioctl(3, LOOP_CLR_FD [pid 3675] <... close resumed>) = 0 [pid 3641] <... ioctl resumed>) = 0 [pid 3675] close(3 [pid 3641] close(3 [pid 3675] <... close resumed>) = 0 [pid 3641] <... close resumed>) = 0 [pid 3675] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3641] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3675] <... openat resumed>) = 3 [pid 3675] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3641] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3679 [pid 3675] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3675] exit_group(0) = ? [pid 3675] +++ exited with 0 +++ [pid 3644] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3675, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3644] restart_syscall(<... resuming interrupted clone ...>) = 0 [pid 3644] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 3644] ioctl(3, LOOP_CLR_FD) = 0 [pid 3644] close(3) = 0 [pid 3644] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555cfa5d0) = 3680 ./strace-static-x86_64: Process 3679 attached [pid 3679] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 3680 attached ) = 0 [pid 3680] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3679] setpgid(0, 0) = 0 [pid 3679] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3680] <... prctl resumed>) = 0 [pid 3680] setpgid(0, 0 [pid 3679] <... openat resumed>) = 3 [pid 3680] <... setpgid resumed>) = 0 [pid 3679] write(3, "1000", 4 [pid 3680] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3679] <... write resumed>) = 4 [pid 3680] <... openat resumed>) = 3 [pid 3679] close(3 [pid 3680] write(3, "1000", 4 [pid 3679] <... close resumed>) = 0 [pid 3680] <... write resumed>) = 4 [pid 3679] memfd_create("syzkaller", 0 [pid 3680] close(3 [pid 3679] <... memfd_create resumed>) = 3 [pid 3680] <... close resumed>) = 0 [pid 3679] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3680] memfd_create("syzkaller", 0 [pid 3679] <... mmap resumed>) = 0x7fdd15200000 [pid 3680] <... memfd_create resumed>) = 3 [pid 3679] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3680] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdd15200000 [pid 3680] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3679] <... write resumed>) = 262144 [pid 3679] munmap(0x7fdd15200000, 262144 [pid 3680] <... write resumed>) = 262144 [pid 3680] munmap(0x7fdd15200000, 262144) = 0 [pid 3679] <... munmap resumed>) = 0 [pid 3679] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3680] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3679] <... openat resumed>) = 4 [pid 3680] <... openat resumed>) = 4 [pid 3679] ioctl(4, LOOP_SET_FD, 3 [pid 3680] ioctl(4, LOOP_SET_FD, 3 [pid 3679] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3680] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3680] ioctl(4, LOOP_CLR_FD [pid 3679] ioctl(4, LOOP_CLR_FD [pid 3680] <... ioctl resumed>) = 0 [pid 3679] <... ioctl resumed>) = 0 [pid 3680] ioctl(4, LOOP_SET_FD, 3 [pid 3679] ioctl(4, LOOP_SET_FD, 3 [pid 3680] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3679] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3680] close(4 [pid 3679] close(4 [pid 3680] <... close resumed>) = 0 [pid 3679] <... close resumed>) = 0 [pid 3680] close(3 [pid 3679] close(3 [pid 3680] <... close resumed>) = 0 [pid 3680] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3679] <... close resumed>) = 0 [pid 3680] <... openat resumed>) = 3 [pid 3679] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3680] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3679] <... openat resumed>) = 3 [pid 3680] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3679] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3680] exit_group(0 [pid 3679] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3680] <... exit_group resumed>) = ? [pid 3679] exit_group(0 [pid 3680] +++ exited with 0 +++ [pid 3679] <... exit_group resumed>) = ? [pid 3644] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3680, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3679] +++ exited with 0 +++ [pid 3641] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3679, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3644] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 3644] ioctl(3, LOOP_CLR_FD) = 0 [pid 3644] close(3) = 0 [pid 3644] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555cfa5d0) = 3681 [pid 3641] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 3641] ioctl(3, LOOP_CLR_FD) = 0 [pid 3641] close(3) = 0 [pid 3641] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555cfa5d0) = 3682 ./strace-static-x86_64: Process 3681 attached ./strace-static-x86_64: Process 3682 attached [pid 3681] prctl(PR_SET_PDEATHSIG, SIGKILL [ 51.500631][ T3652] Modules linked in: [ 51.506907][ T3652] ---[ end trace 0000000000000000 ]--- [ 51.513468][ T3652] RIP: 0010:ext4_get_group_info+0x34d/0x350 [ 51.520104][ T3652] Code: 51 ff 8b 74 24 04 48 c7 c7 80 a2 2b 8d 4c 89 f2 e8 78 70 30 02 43 80 3c 2c 00 0f 85 6d fd ff ff e9 70 fd ff ff e8 93 10 51 ff <0f> 0b 90 55 41 57 41 56 41 54 53 48 89 fb 49 bf 00 00 00 00 00 fc [ 51.540571][ T3652] RSP: 0018:ffffc90003ddf268 EFLAGS: 00010293 [pid 3676] close(3) = 0 [pid 3683] ioctl(4, LOOP_SET_FD, 3 [pid 3676] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3683] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3676] <... openat resumed>) = 3 [pid 3683] close(4 [pid 3676] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3683] <... close resumed>) = 0 [pid 3676] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3683] close(3 [pid 3676] exit_group(0 [pid 3683] <... close resumed>) = 0 [pid 3676] <... exit_group resumed>) = ? [pid 3683] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 3676] +++ exited with 0 +++ [pid 3683] <... openat resumed>) = 3 [pid 3642] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3676, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3684] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3683] ioctl(3, FS_IOC_GETFSMAP, 0x20000200 [pid 3678] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3677] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3684] <... openat resumed>) = 3 [pid 3683] <... ioctl resumed>) = -1 EINVAL (Invalid argument) [pid 3683] exit_group(0 [pid 3677] <... openat resumed>) = 3 [pid 3683] <... exit_group resumed>) = ? [pid 3684] write(3, "1000", 4 [pid 3683] +++ exited with 0 +++ [pid 3678] <... openat resumed>) = 3 [pid 3677] write(3, "1000", 4 [pid 3644] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3683, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3642] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 3 [pid 3642] ioctl(3, LOOP_CLR_FD) = 0 [pid 3642] close(3) = 0 [pid 3642] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3644] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 3642] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3685 [pid 3644] <... openat resumed>) = 3 [pid 3644] ioctl(3, LOOP_CLR_FD) = 0 [pid 3644] close(3) = 0 [pid 3644] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555cfa5d0) = 3686 ./strace-static-x86_64: Process 3685 attached [pid 3684] <... write resumed>) = 4 [pid 3678] write(3, "1000", 4 [pid 3677] <... write resumed>) = 4 ./strace-static-x86_64: Process 3686 attached [pid 3684] close(3 [pid 3678] <... write resumed>) = 4 [pid 3677] close(3 [pid 3685] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3685] setpgid(0, 0) = 0 [pid 3685] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 3685] write(3, "1000", 4) = 4 [pid 3685] close(3) = 0 [pid 3685] memfd_create("syzkaller", 0) = 3 [pid 3685] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fdd15200000 [pid 3685] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3686] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3684] <... close resumed>) = 0 [pid 3678] close(3 [pid 3677] <... close resumed>) = 0 [pid 3685] <... write resumed>) = 262144 [pid 3685] munmap(0x7fdd15200000, 262144) = 0 [pid 3685] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 3685] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 3685] ioctl(4, LOOP_CLR_FD [pid 3686] <... prctl resumed>) = 0 [pid 3685] <... ioctl resumed>) = 0 [ 51.547002][ T3652] RAX: ffffffff8239875d RBX: 0000000000000001 RCX: ffff8880229e57c0 [ 51.557701][ T3652] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 [ 51.565761][ T3652] RBP: 0000000000000001 R08: ffffffff82398478 R09: ffffc90003ddf7a0 [ 51.574315][ T3652] R10: fffffbfff1cebe0e R11: 1ffffffff1cebe0d R12: 1ffff1100f4f9ccf [ 51.582875][ T3652] R13: dffffc0000000000 R14: ffff888021ef8000 R15: ffff88807a7ce678 [pid 3684] memfd_create("syzkaller", 0 [pid 3678] <... close resumed>) = 0 [pid 3686] setpgid(0, 0 [pid 3684] <... memfd_create resumed>) = 3 [pid 3677] memfd_create("syzkaller", 0 [pid 3678] memfd_create("syzkaller", 0 [pid 3685] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 3685] close(4) = 0 [pid 3685] close(3) = 0 [pid 3685] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 3 [pid 3685] ioctl(3, FS_IOC_GETFSMAP, 0x20000200) = -1 EINVAL (Invalid argument) [pid 3685] exit_group(0) = ? [pid 3685] +++ exited with 0 +++ [pid 3686] <... setpgid resumed>) = 0 [pid 3684] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3678] <... memfd_create resumed>) = 3 [pid 3677] <... memfd_create resumed>) = 3 [pid 3642] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3685, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3684] <... mmap resumed>) = 0x7fdd15200000 [pid 3684] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3642] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 3684] <... write resumed>) = 262144 [pid 3642] <... openat resumed>) = 3 [pid 3684] munmap(0x7fdd15200000, 262144 [pid 3642] ioctl(3, LOOP_CLR_FD [pid 3684] <... munmap resumed>) = 0 [pid 3642] <... ioctl resumed>) = 0 [pid 3684] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 3642] close(3 [pid 3684] <... openat resumed>) = 4 [pid 3642] <... close resumed>) = 0 [pid 3686] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 3684] ioctl(4, LOOP_SET_FD, 3 [pid 3678] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3677] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3642] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 3686] <... openat resumed>) = 3 [pid 3684] <... ioctl resumed>) = -1 EBUSY (Device or resource busy) [pid 3678] <... mmap resumed>) = 0x7fdd15200000 [pid 3677] <... mmap resumed>) = 0x7fdd15200000 [pid 3684] ioctl(4, LOOP_CLR_FD [pid 3642] <... clone resumed>, child_tidptr=0x555555cfa5d0) = 3687 [pid 3684] <... ioctl resumed>) = 0 [pid 3686] write(3, "1000", 4 [pid 3678] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3684] ioctl(4, LOOP_SET_FD, 3) = -1 EBUSY (Device or resource busy) [pid 3677] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 262144 [pid 3686] <... write resumed>) = 4 [pid 3684] close(4) = 0 [pid 3684] close(3 [pid 3686] close(3 [pid 3684] <... close resumed>) = 0 [pid 3678] <... write resumed>) = 262144 [pid 3677] <... write resumed>) = 262144 ./strace-static-x86_64: Process 3687 attached [pid 3686] <... close resumed>) = 0 [pid 3684] openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 3 [pid 3684] ioctl(3, FS_IOC_GETFSMAP, 0x20000200) = -1 EINVAL (Invalid argument) [pid 3684] exit_group(0) = ? [pid 3684] +++ exited with 0 +++ [pid 3641] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3684, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- [pid 3641] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 3 [pid 3641] ioctl(3, LOOP_CLR_FD) = 0 [pid 3641] close(3) = 0 [pid 3641] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555cfa5d0) = 3688 [pid 3678] munmap(0x7fdd15200000, 262144 [pid 3677] munmap(0x7fdd15200000, 262144 [pid 3686] memfd_create("syzkaller", 0 [pid 3678] <... munmap resumed>) = 0 [pid 3686] <... memfd_create resumed>) = 3 [pid 3678] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 3677] <... munmap resumed>) = 0 [pid 3687] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 3686] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 3677] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 3678] <... openat resumed>) = 4 [pid 3687] <... prctl resumed>) = 0 [pid 3686] <... mmap resumed>) = 0x7fdd15200000 [pid 3678] ioctl(4, LOOP_SET_FD, 3 [pid 3677] <... openat resumed>) = 4 [ 51.591665][ T3652] FS: 0000555555cfa300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 51.601368][ T3652] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.608717][ T3652] CR2: 00007fdd1d83472c CR3: 0000000076607000 CR4: 00000000003506f0 [ 51.618284][ T3652] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.631948][ T3652] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.642621][ T3652] Kernel panic - not syncing: Fatal exception [ 51.648854][ T3652] Kernel Offset: disabled [ 51.653172][ T3652] Rebooting in 86400 seconds..