./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2377544703 <...> Warning: Permanently added '10.128.1.45' (ED25519) to the list of known hosts. execve("./syz-executor2377544703", ["./syz-executor2377544703"], 0x7ffc722cbef0 /* 10 vars */) = 0 brk(NULL) = 0x555557d29000 brk(0x555557d29d00) = 0x555557d29d00 arch_prctl(ARCH_SET_FS, 0x555557d29380) = 0 set_tid_address(0x555557d29650) = 5823 set_robust_list(0x555557d29660, 24) = 0 rseq(0x555557d29ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2377544703", 4096) = 28 getrandom("\x4a\xaa\x72\x36\x6b\xca\x1b\xaa", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557d29d00 brk(0x555557d4ad00) = 0x555557d4ad00 brk(0x555557d4b000) = 0x555557d4b000 mprotect(0x7fa4dd69e000, 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, child_tidptr=0x555557d29650) = 5824 ./strace-static-x86_64: Process 5824 attached [pid 5824] set_robust_list(0x555557d29660, 24) = 0 [pid 5824] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5824] setpgid(0, 0) = 0 [pid 5824] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5824] write(3, "1000", 4) = 4 [pid 5824] close(3) = 0 executing program [pid 5824] write(1, "executing program\n", 18) = 18 [pid 5824] memfd_create("syzkaller", 0) = 3 [pid 5824] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa4d5000000 [pid 5824] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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 5824] munmap(0x7fa4d5000000, 138412032) = 0 [pid 5824] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5824] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5824] close(3) = 0 [pid 5824] close(4) = 0 [pid 5824] mkdir("./file1", 0777) = 0 [ 88.348310][ T5824] loop0: detected capacity change from 0 to 2048 [ 88.374517][ T5825] udevd[5825]: incorrect nilfs2 checksum on /dev/loop0 [pid 5824] mount("/dev/loop0", "./file1", "nilfs2", MS_SYNCHRONOUS, "") = 0 [pid 5824] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5824] chdir("./file1") = 0 [pid 5824] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 88.420766][ T5825] udevd[5825]: incorrect nilfs2 checksum on /dev/loop0 [ 88.434579][ T5824] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [ 88.452608][ T5826] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 88.479662][ T5824] VFS_BUG_ON_INODE(1) encountered for inode ffff888077f487b8 [ 88.479853][ T5824] ------------[ cut here ]------------ [ 88.493497][ T5824] kernel BUG at fs/namei.c:3467! [ 88.498614][ T5824] Oops: invalid opcode: 0000 [#1] SMP KASAN PTI [ 88.504902][ T5824] CPU: 0 UID: 0 PID: 5824 Comm: syz-executor237 Not tainted 6.15.0-rc5-syzkaller-00043-gd76bb1ebb558 #0 PREEMPT(full) [ 88.517310][ T5824] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 [ 88.527365][ T5824] RIP: 0010:may_open+0x462/0x470 [ 88.532325][ T5824] Code: 38 c1 0f 8c 9b fe ff ff 4c 89 ff e8 48 72 ec ff e9 8e fe ff ff e8 7e a3 8c ff 4c 89 f7 48 c7 c6 40 04 79 8b e8 bf e9 f4 fe 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 [ 88.551928][ T5824] RSP: 0018:ffffc90004017960 EFLAGS: 00010246 [ 88.558001][ T5824] RAX: 000000000000003a RBX: dffffc0000000000 RCX: 785b9906d6c5d600 [ 88.565971][ T5824] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 88.573966][ T5824] RBP: ffffffff8e097920 R08: ffff8880b8923e93 R09: 1ffff110171247d2 [ 88.581937][ T5824] R10: dffffc0000000000 R11: ffffed10171247d3 R12: ffffc90004017c40 [ 88.589925][ T5824] R13: 000000000000000e R14: ffff888077f487b8 R15: 0000000000000002 [ 88.597892][ T5824] FS: 0000555557d29380(0000) GS:ffff8881260fe000(0000) knlGS:0000000000000000 [ 88.606840][ T5824] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.613417][ T5824] CR2: 000055761d8c1d70 CR3: 0000000033c42000 CR4: 00000000003526f0 [ 88.621407][ T5824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.629376][ T5824] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.637341][ T5824] Call Trace: [ 88.640639][ T5824] [ 88.643588][ T5824] path_openat+0x2d91/0x3830 [ 88.648200][ T5824] ? __pfx_path_openat+0x10/0x10 [ 88.653136][ T5824] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 88.659205][ T5824] do_filp_open+0x1fa/0x410 [ 88.663710][ T5824] ? __pfx_do_filp_open+0x10/0x10 [ 88.668738][ T5824] ? _raw_spin_unlock+0x28/0x50 [ 88.673595][ T5824] ? alloc_fd+0x64c/0x6c0 [ 88.677928][ T5824] do_sys_openat2+0x121/0x1c0 [ 88.682602][ T5824] ? __pfx_ptrace_notify+0x10/0x10 [ 88.687715][ T5824] ? __pfx_do_sys_openat2+0x10/0x10 [ 88.692924][ T5824] __x64_sys_creat+0x8f/0xc0 [ 88.697533][ T5824] do_syscall_64+0xf6/0x210 [ 88.702035][ T5824] ? clear_bhb_loop+0x45/0xa0 [ 88.706722][ T5824] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 88.712613][ T5824] RIP: 0033:0x7fa4dd62aa99 [ 88.717041][ T5824] 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 [ 88.736686][ T5824] RSP: 002b:00007ffe7ffa2e98 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 88.745104][ T5824] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa4dd62aa99 [ 88.753075][ T5824] RDX: 00007fa4dd629a91 RSI: ecf86c37d53049cc RDI: 0000200000000280 [ 88.761051][ T5824] RBP: 00007fa4dd69e5f0 R08: 0000000000000a54 R09: 0000555557d2a4c0 [ 88.769017][ T5824] R10: 00007ffe7ffa2d60 R11: 0000000000000246 R12: 00007ffe7ffa2ec0 [ 88.776990][ T5824] R13: 00007ffe7ffa30e8 R14: 431bde82d7b634db R15: 00007fa4dd67303b [ 88.784967][ T5824] [ 88.787988][ T5824] Modules linked in: [ 88.792147][ T5824] ---[ end trace 0000000000000000 ]--- [ 88.797988][ T5824] RIP: 0010:may_open+0x462/0x470 [ 88.803017][ T5824] Code: 38 c1 0f 8c 9b fe ff ff 4c 89 ff e8 48 72 ec ff e9 8e fe ff ff e8 7e a3 8c ff 4c 89 f7 48 c7 c6 40 04 79 8b e8 bf e9 f4 fe 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 [ 88.822699][ T5824] RSP: 0018:ffffc90004017960 EFLAGS: 00010246 [ 88.828841][ T5824] RAX: 000000000000003a RBX: dffffc0000000000 RCX: 785b9906d6c5d600 [ 88.836861][ T5824] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 88.844880][ T5824] RBP: ffffffff8e097920 R08: ffff8880b8923e93 R09: 1ffff110171247d2 [ 88.852853][ T5824] R10: dffffc0000000000 R11: ffffed10171247d3 R12: ffffc90004017c40 [ 88.860903][ T5824] R13: 000000000000000e R14: ffff888077f487b8 R15: 0000000000000002 [ 88.868924][ T5824] FS: 0000555557d29380(0000) GS:ffff8881260fe000(0000) knlGS:0000000000000000 [ 88.877928][ T5824] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.884554][ T5824] CR2: 000055761d8c1d70 CR3: 0000000033c42000 CR4: 00000000003526f0 [ 88.892528][ T5824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.900554][ T5824] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.908569][ T5824] Kernel panic - not syncing: Fatal exception [ 88.914942][ T5824] Kernel Offset: disabled [ 88.919271][ T5824] Rebooting in 86400 seconds..