./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3471107143 <...> Warning: Permanently added '10.128.0.165' (ED25519) to the list of known hosts. execve("./syz-executor3471107143", ["./syz-executor3471107143"], 0x7ffebbc15e10 /* 10 vars */) = 0 brk(NULL) = 0x555570072000 brk(0x555570072d00) = 0x555570072d00 arch_prctl(ARCH_SET_FS, 0x555570072380) = 0 set_tid_address(0x555570072650) = 5839 set_robust_list(0x555570072660, 24) = 0 rseq(0x555570072ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3471107143", 4096) = 28 getrandom("\xac\x97\x04\x10\x1b\xa3\xe2\x7a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555570072d00 brk(0x555570093d00) = 0x555570093d00 brk(0x555570094000) = 0x555570094000 mprotect(0x7f70c577a000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5840 attached [pid 5840] set_robust_list(0x555570072660, 24) = 0 [pid 5840] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5839] <... clone resumed>, child_tidptr=0x555570072650) = 5840 [pid 5840] <... prctl resumed>) = 0 [pid 5840] setpgid(0, 0) = 0 [pid 5840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5840] write(3, "1000", 4) = 4 [pid 5840] close(3) = 0 executing program [pid 5840] write(1, "executing program\n", 18) = 18 [pid 5840] memfd_create("syzkaller", 0) = 3 [pid 5840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f70bd200000 [pid 5840] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 5840] munmap(0x7f70bd200000, 138412032) = 0 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5840] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5840] close(3) = 0 [pid 5840] close(4) = 0 [pid 5840] mkdir("./file0", 0777) = 0 [ 78.225490][ T5840] loop0: detected capacity change from 0 to 2048 [ 78.250261][ T5840] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [pid 5840] mount("/dev/loop0", "./file0", "nilfs2", MS_SYNCHRONOUS, "") = 0 [pid 5840] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5840] chdir("./file0") = 0 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 78.268714][ T5841] udevd[5841]: incorrect nilfs2 checksum on /dev/loop0 [ 78.280416][ T5842] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 78.327333][ T5840] VFS_BUG_ON_INODE(!IS_ANON_FILE(inode)) encountered for inode ffff88807f9cb458 [ 78.327451][ T5840] ------------[ cut here ]------------ [ 78.342202][ T5840] kernel BUG at fs/namei.c:3483! [ 78.347326][ T5840] Oops: invalid opcode: 0000 [#1] SMP KASAN PTI [ 78.353852][ T5840] CPU: 0 UID: 0 PID: 5840 Comm: syz-executor347 Not tainted 6.16.0-rc5-syzkaller #0 PREEMPT(full) [ 78.364873][ T5840] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 78.375324][ T5840] RIP: 0010:may_open+0x4b1/0x4c0 [ 78.381064][ T5840] Code: 38 c1 0f 8c 1e fd ff ff 4c 89 e7 e8 69 25 ec ff e9 11 fd ff ff e8 9f cd 8a ff 4c 89 f7 48 c7 c6 40 40 99 8b e8 70 cb f2 fe 90 <0f> 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 [ 78.401731][ T5840] RSP: 0018:ffffc900042af940 EFLAGS: 00010246 [ 78.407812][ T5840] RAX: 000000000000004d RBX: dffffc0000000000 RCX: b5f40551ce941e00 [ 78.415796][ T5840] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 78.423774][ T5840] RBP: 000000000010b341 R08: ffff8880b8624293 R09: 1ffff110170c4852 [ 78.432081][ T5840] R10: dffffc0000000000 R11: ffffed10170c4853 R12: 0000000000000000 [ 78.440220][ T5840] R13: ffffffff8e29ca80 R14: ffff88807f9cb458 R15: 0000000000000002 [ 78.448187][ T5840] FS: 0000555570072380(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000 [ 78.457284][ T5840] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.463959][ T5840] CR2: 00007f750f18dd30 CR3: 0000000073c80000 CR4: 00000000003526f0 [ 78.472206][ T5840] Call Trace: [ 78.475675][ T5840] [ 78.478739][ T5840] path_openat+0x2d91/0x3830 [ 78.483426][ T5840] ? arch_stack_walk+0xfc/0x150 [ 78.488544][ T5840] ? __pfx_path_openat+0x10/0x10 [ 78.493574][ T5840] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.499842][ T5840] do_filp_open+0x1fa/0x410 [ 78.504409][ T5840] ? __lock_acquire+0xab9/0xd20 [ 78.509267][ T5840] ? __pfx_do_filp_open+0x10/0x10 [ 78.514335][ T5840] ? _raw_spin_unlock+0x28/0x50 [ 78.519366][ T5840] ? alloc_fd+0x64c/0x6c0 [ 78.523787][ T5840] do_sys_openat2+0x121/0x1c0 [ 78.528530][ T5840] ? __pfx_do_sys_openat2+0x10/0x10 [ 78.533828][ T5840] ? rcu_is_watching+0x15/0xb0 [ 78.538818][ T5840] __x64_sys_openat+0x138/0x170 [ 78.543766][ T5840] do_syscall_64+0xfa/0x3b0 [ 78.548364][ T5840] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.554791][ T5840] ? asm_common_interrupt+0x26/0x40 [ 78.559992][ T5840] ? clear_bhb_loop+0x60/0xb0 [ 78.564660][ T5840] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.570823][ T5840] RIP: 0033:0x7f70c5706a99 [ 78.575253][ T5840] 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 [ 78.596174][ T5840] RSP: 002b:00007ffcb10a90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 78.605738][ T5840] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f70c5706a99 [ 78.613977][ T5840] RDX: 0000000000183341 RSI: 0000200000000080 RDI: 00000000ffffff9c [ 78.622221][ T5840] RBP: 00007f70c577a5f0 R08: 0000000000000a66 R09: 00005555700734c0 [ 78.630642][ T5840] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcb10a90f0 [ 78.639127][ T5840] R13: 00007ffcb10a9318 R14: 431bde82d7b634db R15: 00007f70c574f03b [ 78.647221][ T5840] [ 78.650243][ T5840] Modules linked in: [ 78.654447][ T5840] ---[ end trace 0000000000000000 ]--- [ 78.660100][ T5840] RIP: 0010:may_open+0x4b1/0x4c0 [ 78.665146][ T5840] Code: 38 c1 0f 8c 1e fd ff ff 4c 89 e7 e8 69 25 ec ff e9 11 fd ff ff e8 9f cd 8a ff 4c 89 f7 48 c7 c6 40 40 99 8b e8 70 cb f2 fe 90 <0f> 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 [ 78.685152][ T5840] RSP: 0018:ffffc900042af940 EFLAGS: 00010246 [ 78.691313][ T5840] RAX: 000000000000004d RBX: dffffc0000000000 RCX: b5f40551ce941e00 [ 78.699760][ T5840] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 78.708065][ T5840] RBP: 000000000010b341 R08: ffff8880b8624293 R09: 1ffff110170c4852 [ 78.716105][ T5840] R10: dffffc0000000000 R11: ffffed10170c4853 R12: 0000000000000000 [ 78.724706][ T5840] R13: ffffffff8e29ca80 R14: ffff88807f9cb458 R15: 0000000000000002 [ 78.733206][ T5840] FS: 0000555570072380(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000 [ 78.742462][ T5840] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.749057][ T5840] CR2: 00007f750f18dd30 CR3: 0000000073c80000 CR4: 00000000003526f0 [ 78.757619][ T5840] Kernel panic - not syncing: Fatal exception [ 78.764578][ T5840] Kernel Offset: disabled [ 78.769161][ T5840] Rebooting in 86400 seconds..