./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3212046979 <...> Warning: Permanently added '10.128.0.207' (ED25519) to the list of known hosts. execve("./syz-executor3212046979", ["./syz-executor3212046979"], 0x7ffd57cf0790 /* 10 vars */) = 0 brk(NULL) = 0x55558eb2e000 brk(0x55558eb2ed00) = 0x55558eb2ed00 arch_prctl(ARCH_SET_FS, 0x55558eb2e380) = 0 set_tid_address(0x55558eb2e650) = 5829 set_robust_list(0x55558eb2e660, 24) = 0 rseq(0x55558eb2eca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3212046979", 4096) = 28 getrandom("\x16\xb6\xc9\x22\xb1\xff\x3f\xf3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558eb2ed00 brk(0x55558eb4fd00) = 0x55558eb4fd00 brk(0x55558eb50000) = 0x55558eb50000 mprotect(0x7ff933830000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5830 attached [pid 5830] set_robust_list(0x55558eb2e660, 24 [pid 5829] <... clone resumed>, child_tidptr=0x55558eb2e650) = 5830 [pid 5830] <... set_robust_list resumed>) = 0 [pid 5830] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5830] setpgid(0, 0) = 0 [pid 5830] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5830] write(3, "1000", 4) = 4 [pid 5830] close(3) = 0 executing program [pid 5830] write(1, "executing program\n", 18) = 18 [pid 5830] mkdirat(AT_FDCWD, "./file0", 020) = 0 [pid 5830] mkdirat(AT_FDCWD, "./file1", 000) = 0 [pid 5830] mkdir("./bus", 000) = 0 [pid 5830] mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = 0 [pid 5830] chdir("./bus") = 0 [pid 5830] openat(AT_FDCWD, "cgroup.freeze", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 3 [pid 5830] mmap(0x200000000000, 11755520, PROT_READ|PROT_WRITE|PROT_GROWSDOWN, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 3, 0) = 0x200000000000 [ 86.553438][ T5830] ------------[ cut here ]------------ [ 86.559188][ T5830] WARNING: CPU: 0 PID: 5830 at fs/file.c:1202 file_seek_cur_needs_f_lock+0x11f/0x150 [ 86.568974][ T5830] Modules linked in: [ 86.572972][ T5830] CPU: 0 UID: 0 PID: 5830 Comm: syz-executor321 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(full) [ 86.583893][ T5830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 86.593996][ T5830] RIP: 0010:file_seek_cur_needs_f_lock+0x11f/0x150 [ 86.600545][ T5830] Code: 74 22 e8 84 62 7d ff eb 05 e8 7d 62 7d ff b0 01 5b 41 5e 41 5f 5d c3 cc cc cc cc e8 6b 62 7d ff 31 c0 eb ec e8 62 62 7d ff 90 <0f> 0b 90 eb df 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 00 ff ff ff 48 [ 86.620219][ T5830] RSP: 0018:ffffc90003fa7e20 EFLAGS: 00010293 [ 86.626343][ T5830] RAX: ffffffff8245e1fe RBX: 0000000000000000 RCX: ffff88802ae13c00 [ 86.634379][ T5830] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888075ce0090 [ 86.642372][ T5830] RBP: 0000000000008000 R08: ffff888075ce0097 R09: 1ffff1100eb9c012 [ 86.650447][ T5830] R10: dffffc0000000000 R11: ffffed100eb9c013 R12: ffff88802f6d1600 [ 86.658462][ T5830] R13: 0000000000000005 R14: ffff888075ce0090 R15: bfffffffffffffff [ 86.666478][ T5830] FS: 000055558eb2e380(0000) GS:ffff888124fc9000(0000) knlGS:0000000000000000 [ 86.675465][ T5830] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.682335][ T5830] CR2: 0000200000001000 CR3: 0000000075ec0000 CR4: 00000000003526f0 [ 86.690371][ T5830] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.698416][ T5830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 86.706456][ T5830] Call Trace: [ 86.709758][ T5830] [ 86.712708][ T5830] generic_file_llseek_size+0xa7/0x4b0 [ 86.718264][ T5830] ovl_llseek+0x189/0x220 [ 86.722629][ T5830] __x64_sys_lseek+0x14c/0x1e0 [ 86.727468][ T5830] do_syscall_64+0xf3/0x230 [ 86.732098][ T5830] ? clear_bhb_loop+0x45/0xa0 [ 86.736829][ T5830] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.742758][ T5830] RIP: 0033:0x7ff9337bdbf9 [ 86.747240][ T5830] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 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 [ 86.766927][ T5830] RSP: 002b:00007ffd57e56458 EFLAGS: 00000246 ORIG_RAX: 0000000000000008 [ 86.775430][ T5830] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007ff9337bdbf9 [ 86.783443][ T5830] RDX: 0000000000000001 RSI: 0000000000000005 RDI: 0000000000000003 [ 86.791514][ T5830] RBP: 00007ff9338305f0 R08: 0000000000000000 R09: 0000000000000000 [ 86.799543][ T5830] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 86.807576][ T5830] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 86.815621][ T5830] [ 86.818674][ T5830] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 86.825973][ T5830] CPU: 0 UID: 0 PID: 5830 Comm: syz-executor321 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(full) [ 86.836676][ T5830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 86.846835][ T5830] Call Trace: [ 86.850129][ T5830] [ 86.853068][ T5830] dump_stack_lvl+0x241/0x360 [ 86.857781][ T5830] ? __pfx_dump_stack_lvl+0x10/0x10 [ 86.863003][ T5830] ? __pfx__printk+0x10/0x10 [ 86.867621][ T5830] ? vscnprintf+0x5d/0x90 [ 86.871975][ T5830] panic+0x349/0x880 [ 86.875896][ T5830] ? __warn+0x174/0x4d0 [ 86.880083][ T5830] ? __pfx_panic+0x10/0x10 [ 86.884539][ T5830] __warn+0x344/0x4d0 [ 86.888549][ T5830] ? file_seek_cur_needs_f_lock+0x11f/0x150 [ 86.894553][ T5830] report_bug+0x2b3/0x500 [ 86.898903][ T5830] ? file_seek_cur_needs_f_lock+0x11f/0x150 [ 86.904816][ T5830] ? file_seek_cur_needs_f_lock+0x11f/0x150 [ 86.910729][ T5830] ? file_seek_cur_needs_f_lock+0x121/0x150 [ 86.916638][ T5830] handle_bug+0x89/0x170 [ 86.920996][ T5830] exc_invalid_op+0x1a/0x50 [ 86.925525][ T5830] asm_exc_invalid_op+0x1a/0x20 [ 86.930375][ T5830] RIP: 0010:file_seek_cur_needs_f_lock+0x11f/0x150 [ 86.936900][ T5830] Code: 74 22 e8 84 62 7d ff eb 05 e8 7d 62 7d ff b0 01 5b 41 5e 41 5f 5d c3 cc cc cc cc e8 6b 62 7d ff 31 c0 eb ec e8 62 62 7d ff 90 <0f> 0b 90 eb df 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 00 ff ff ff 48 [ 86.956508][ T5830] RSP: 0018:ffffc90003fa7e20 EFLAGS: 00010293 [ 86.962585][ T5830] RAX: ffffffff8245e1fe RBX: 0000000000000000 RCX: ffff88802ae13c00 [ 86.970556][ T5830] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888075ce0090 [ 86.978545][ T5830] RBP: 0000000000008000 R08: ffff888075ce0097 R09: 1ffff1100eb9c012 [ 86.986523][ T5830] R10: dffffc0000000000 R11: ffffed100eb9c013 R12: ffff88802f6d1600 [ 86.994500][ T5830] R13: 0000000000000005 R14: ffff888075ce0090 R15: bfffffffffffffff [ 87.002485][ T5830] ? file_seek_cur_needs_f_lock+0x11e/0x150 [ 87.008483][ T5830] generic_file_llseek_size+0xa7/0x4b0 [ 87.013960][ T5830] ovl_llseek+0x189/0x220 [ 87.018303][ T5830] __x64_sys_lseek+0x14c/0x1e0 [ 87.023086][ T5830] do_syscall_64+0xf3/0x230 [ 87.027598][ T5830] ? clear_bhb_loop+0x45/0xa0 [ 87.032283][ T5830] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 87.038180][ T5830] RIP: 0033:0x7ff9337bdbf9 [ 87.042601][ T5830] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 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 [ 87.062210][ T5830] RSP: 002b:00007ffd57e56458 EFLAGS: 00000246 ORIG_RAX: 0000000000000008 [ 87.070632][ T5830] RAX: ffffffffffffffda RBX: 0000200000000140 RCX: 00007ff9337bdbf9 [ 87.078607][ T5830] RDX: 0000000000000001 RSI: 0000000000000005 RDI: 0000000000000003 [ 87.086580][ T5830] RBP: 00007ff9338305f0 R08: 0000000000000000 R09: 0000000000000000 [ 87.094556][ T5830] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 87.102530][ T5830] R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001 [ 87.110515][ T5830] [ 87.113858][ T5830] Kernel Offset: disabled [ 87.118187][ T5830] Rebooting in 86400 seconds..