./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2352418060 <...> Warning: Permanently added '10.128.1.75' (ED25519) to the list of known hosts. execve("./syz-executor2352418060", ["./syz-executor2352418060"], 0x7ffc7e67c460 /* 10 vars */) = 0 brk(NULL) = 0x55556b043000 brk(0x55556b043d00) = 0x55556b043d00 arch_prctl(ARCH_SET_FS, 0x55556b043380) = 0 set_tid_address(0x55556b043650) = 5834 set_robust_list(0x55556b043660, 24) = 0 rseq(0x55556b043ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2352418060", 4096) = 28 getrandom("\xf8\x0a\x11\xd7\xa2\x47\x8f\xa1", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556b043d00 brk(0x55556b064d00) = 0x55556b064d00 brk(0x55556b065000) = 0x55556b065000 mprotect(0x7f1bb68c3000, 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 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 5836 attached , child_tidptr=0x55556b043650) = 5836 [pid 5836] set_robust_list(0x55556b043660, 24) = 0 [pid 5836] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5836] setpgid(0, 0) = 0 [pid 5836] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5836] write(3, "1000", 4) = 4 [pid 5836] close(3) = 0 [pid 5836] write(1, "executing program\n", 18executing program ) = 18 [pid 5836] memfd_create("syzkaller", 0) = 3 [pid 5836] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f1bae200000 [pid 5836] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 67108864) = 67108864 [pid 5836] munmap(0x7f1bae200000, 138412032) = 0 [pid 5836] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5836] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5836] close(3) = 0 [pid 5836] close(4) = 0 [pid 5836] mkdir("./file2", 0777) = 0 [ 72.247455][ T5836] loop0: detected capacity change from 0 to 131072 [ 72.295254][ T5836] F2FS-fs (loop0): invalid crc value [ 72.312818][ T5836] F2FS-fs (loop0): Found nat_bits in checkpoint [pid 5836] mount("/dev/loop0", "./file2", "f2fs", MS_DIRSYNC|MS_RELATIME, "") = 0 [pid 5836] openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 [pid 5836] chdir("./file2") = 0 [pid 5836] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 72.341320][ T5836] F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4 [ 72.375215][ T5836] ------------[ cut here ]------------ [ 72.380744][ T5836] WARNING: CPU: 1 PID: 5836 at fs/inode.c:407 drop_nlink+0xc4/0x110 [ 72.388836][ T5836] Modules linked in: [ 72.392837][ T5836] CPU: 1 UID: 0 PID: 5836 Comm: syz-executor235 Not tainted 6.12.0-syzkaller-07834-g06afb0f36106 #0 [ 72.403674][ T5836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 72.413796][ T5836] RIP: 0010:drop_nlink+0xc4/0x110 [ 72.418856][ T5836] Code: bb 70 07 00 00 be 08 00 00 00 e8 27 d8 e5 ff f0 48 ff 83 70 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 9d 40 7e ff 90 <0f> 0b 90 eb 83 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff [ 72.438627][ T5836] RSP: 0018:ffffc90003e87b98 EFLAGS: 00010293 [ 72.444829][ T5836] RAX: ffffffff82170c43 RBX: 1ffff1100eded354 RCX: ffff888024a15a00 [ 72.452890][ T5836] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 72.460877][ T5836] RBP: 0000000000000000 R08: ffffffff82170bc3 R09: 1ffffffff2038026 [ 72.468953][ T5836] R10: dffffc0000000000 R11: fffffbfff2038027 R12: ffff888076f69aa0 [ 72.476972][ T5836] R13: dffffc0000000000 R14: ffff888076f69a58 R15: dffffc0000000000 [ 72.484989][ T5836] FS: 000055556b043380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 72.493959][ T5836] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.500555][ T5836] CR2: 0000000002e17538 CR3: 00000000795fe000 CR4: 00000000003526f0 [ 72.508589][ T5836] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.516610][ T5836] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.524623][ T5836] Call Trace: [ 72.527911][ T5836] [ 72.530848][ T5836] ? __warn+0x168/0x4e0 [ 72.535067][ T5836] ? drop_nlink+0xc4/0x110 [ 72.539508][ T5836] ? report_bug+0x2b3/0x500 [ 72.544064][ T5836] ? drop_nlink+0xc4/0x110 [ 72.548499][ T5836] ? handle_bug+0x60/0x90 [ 72.552877][ T5836] ? exc_invalid_op+0x1a/0x50 [ 72.557571][ T5836] ? asm_exc_invalid_op+0x1a/0x20 [ 72.562698][ T5836] ? drop_nlink+0x43/0x110 [ 72.567144][ T5836] ? drop_nlink+0xc3/0x110 [ 72.571651][ T5836] ? drop_nlink+0xc4/0x110 [ 72.576089][ T5836] ? drop_nlink+0xc3/0x110 [ 72.580500][ T5836] f2fs_drop_nlink+0xd6/0x380 [ 72.585245][ T5836] f2fs_unlink+0x47f/0x960 [ 72.589892][ T5836] ? __pfx_f2fs_unlink+0x10/0x10 [ 72.594904][ T5836] ? bpf_lsm_inode_unlink+0x9/0x10 [ 72.600027][ T5836] ? security_inode_unlink+0xd9/0x340 [ 72.605450][ T5836] vfs_unlink+0x365/0x650 [ 72.609807][ T5836] do_unlinkat+0x4ae/0x830 [ 72.614288][ T5836] ? __pfx_do_unlinkat+0x10/0x10 [ 72.619243][ T5836] ? __might_fault+0xaa/0x120 [ 72.623999][ T5836] ? __might_fault+0xc6/0x120 [ 72.628692][ T5836] ? strncpy_from_user+0x13a/0x260 [ 72.633869][ T5836] ? getname_flags+0x1e3/0x540 [ 72.638653][ T5836] __x64_sys_unlinkat+0xcc/0xf0 [ 72.643562][ T5836] do_syscall_64+0xf3/0x230 [ 72.648082][ T5836] ? clear_bhb_loop+0x35/0x90 [ 72.652803][ T5836] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 72.658721][ T5836] RIP: 0033:0x7f1bb683fa59 [ 72.663193][ T5836] 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 [ 72.682883][ T5836] RSP: 002b:00007ffc135d4fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 [ 72.691726][ T5836] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1bb683fa59 [ 72.699721][ T5836] RDX: 0000000000000000 RSI: 0000000020000380 RDI: 00000000ffffff9c [ 72.707768][ T5836] RBP: 00007f1bb68c35f0 R08: 00000000000105b7 R09: 000055556b0444c0 [ 72.715783][ T5836] R10: 00007ffc135d4e70 R11: 0000000000000246 R12: 00007ffc135d4fd0 [ 72.723798][ T5836] R13: 00007ffc135d51f8 R14: 431bde82d7b634db R15: 00007f1bb688803b [ 72.731832][ T5836] [ 72.734854][ T5836] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 72.742120][ T5836] CPU: 1 UID: 0 PID: 5836 Comm: syz-executor235 Not tainted 6.12.0-syzkaller-07834-g06afb0f36106 #0 [ 72.752867][ T5836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 72.763282][ T5836] Call Trace: [ 72.766548][ T5836] [ 72.769465][ T5836] dump_stack_lvl+0x241/0x360 [ 72.774152][ T5836] ? __pfx_dump_stack_lvl+0x10/0x10 [ 72.779339][ T5836] ? __pfx__printk+0x10/0x10 [ 72.783916][ T5836] ? _printk+0xd5/0x120 [ 72.788059][ T5836] ? __init_begin+0x41000/0x41000 [ 72.793077][ T5836] ? vscnprintf+0x5d/0x90 [ 72.797397][ T5836] panic+0x349/0x880 [ 72.801280][ T5836] ? __warn+0x177/0x4e0 [ 72.805421][ T5836] ? __pfx_panic+0x10/0x10 [ 72.809823][ T5836] ? show_trace_log_lvl+0x3b2/0x410 [ 72.815024][ T5836] __warn+0x34b/0x4e0 [ 72.818999][ T5836] ? drop_nlink+0xc4/0x110 [ 72.823437][ T5836] report_bug+0x2b3/0x500 [ 72.827754][ T5836] ? drop_nlink+0xc4/0x110 [ 72.832160][ T5836] handle_bug+0x60/0x90 [ 72.836305][ T5836] exc_invalid_op+0x1a/0x50 [ 72.840824][ T5836] asm_exc_invalid_op+0x1a/0x20 [ 72.845683][ T5836] RIP: 0010:drop_nlink+0xc4/0x110 [ 72.850714][ T5836] Code: bb 70 07 00 00 be 08 00 00 00 e8 27 d8 e5 ff f0 48 ff 83 70 07 00 00 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 9d 40 7e ff 90 <0f> 0b 90 eb 83 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff [ 72.870446][ T5836] RSP: 0018:ffffc90003e87b98 EFLAGS: 00010293 [ 72.876521][ T5836] RAX: ffffffff82170c43 RBX: 1ffff1100eded354 RCX: ffff888024a15a00 [ 72.884491][ T5836] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 72.892464][ T5836] RBP: 0000000000000000 R08: ffffffff82170bc3 R09: 1ffffffff2038026 [ 72.900431][ T5836] R10: dffffc0000000000 R11: fffffbfff2038027 R12: ffff888076f69aa0 [ 72.908428][ T5836] R13: dffffc0000000000 R14: ffff888076f69a58 R15: dffffc0000000000 [ 72.916406][ T5836] ? drop_nlink+0x43/0x110 [ 72.920841][ T5836] ? drop_nlink+0xc3/0x110 [ 72.925279][ T5836] ? drop_nlink+0xc3/0x110 [ 72.929712][ T5836] f2fs_drop_nlink+0xd6/0x380 [ 72.934405][ T5836] f2fs_unlink+0x47f/0x960 [ 72.938834][ T5836] ? __pfx_f2fs_unlink+0x10/0x10 [ 72.943781][ T5836] ? bpf_lsm_inode_unlink+0x9/0x10 [ 72.948894][ T5836] ? security_inode_unlink+0xd9/0x340 [ 72.954273][ T5836] vfs_unlink+0x365/0x650 [ 72.958607][ T5836] do_unlinkat+0x4ae/0x830 [ 72.963030][ T5836] ? __pfx_do_unlinkat+0x10/0x10 [ 72.967970][ T5836] ? __might_fault+0xaa/0x120 [ 72.972645][ T5836] ? __might_fault+0xc6/0x120 [ 72.977319][ T5836] ? strncpy_from_user+0x13a/0x260 [ 72.982429][ T5836] ? getname_flags+0x1e3/0x540 [ 72.987377][ T5836] __x64_sys_unlinkat+0xcc/0xf0 [ 72.992237][ T5836] do_syscall_64+0xf3/0x230 [ 72.996740][ T5836] ? clear_bhb_loop+0x35/0x90 [ 73.001415][ T5836] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.007303][ T5836] RIP: 0033:0x7f1bb683fa59 [ 73.011711][ T5836] 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 [ 73.031312][ T5836] RSP: 002b:00007ffc135d4fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 [ 73.039724][ T5836] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1bb683fa59 [ 73.047691][ T5836] RDX: 0000000000000000 RSI: 0000000020000380 RDI: 00000000ffffff9c [ 73.055697][ T5836] RBP: 00007f1bb68c35f0 R08: 00000000000105b7 R09: 000055556b0444c0 [ 73.063672][ T5836] R10: 00007ffc135d4e70 R11: 0000000000000246 R12: 00007ffc135d4fd0 [ 73.071652][ T5836] R13: 00007ffc135d51f8 R14: 431bde82d7b634db R15: 00007f1bb688803b [ 73.079655][ T5836] [ 73.082950][ T5836] Kernel Offset: disabled [ 73.087370][ T5836] Rebooting in 86400 seconds..