./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor941564297
<...>
Warning: Permanently added '10.128.15.192' (ED25519) to the list of known hosts.
execve("./syz-executor941564297", ["./syz-executor941564297"], 0x7ffe78753000 /* 10 vars */) = 0
brk(NULL) = 0x55556143e000
brk(0x55556143ed00) = 0x55556143ed00
arch_prctl(ARCH_SET_FS, 0x55556143e380) = 0
set_tid_address(0x55556143e650) = 5835
set_robust_list(0x55556143e660, 24) = 0
rseq(0x55556143eca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor941564297", 4096) = 27
getrandom("\x61\xc1\xa3\x3a\xfe\xcd\xcb\x54", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x55556143ed00
brk(0x55556145fd00) = 0x55556145fd00
brk(0x555561460000) = 0x555561460000
mprotect(0x7f731c6de000, 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
write(1, "executing program\n", 18executing program
) = 18
memfd_create("syzkaller", 0) = 3
mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7314200000
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
munmap(0x7f7314200000, 138412032) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
ioctl(4, LOOP_SET_FD, 3) = 0
close(3) = 0
close(4) = 0
mkdir("./file2", 0777) = 0
syzkaller login: [ 59.811883][ T5835] loop0: detected capacity change from 0 to 131072
[ 59.860887][ T5835] F2FS-fs (loop0): invalid crc value
mount("/dev/loop0", "./file2", "f2fs", MS_DIRSYNC|MS_RELATIME, "") = 0
openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3
chdir("./file2") = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[ 59.884638][ T5835] F2FS-fs (loop0): Found nat_bits in checkpoint
[ 59.912570][ T5835] F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4
[ 59.975685][ T5835] ------------[ cut here ]------------
[ 59.981229][ T5835] WARNING: CPU: 0 PID: 5835 at fs/inode.c:407 drop_nlink+0xc4/0x110
[ 59.989348][ T5835] Modules linked in:
[ 59.993326][ T5835] CPU: 0 UID: 0 PID: 5835 Comm: syz-executor941 Not tainted 6.12.0-syzkaller-07834-g06afb0f36106 #0
[ 60.004159][ T5835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
[ 60.014303][ T5835] RIP: 0010:drop_nlink+0xc4/0x110
[ 60.019362][ T5835] 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
[ 60.039050][ T5835] RSP: 0018:ffffc90003e57b98 EFLAGS: 00010293
[ 60.045205][ T5835] RAX: ffffffff82170c43 RBX: 1ffff1100e618354 RCX: ffff88807da58000
[ 60.053216][ T5835] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 60.061202][ T5835] RBP: 0000000000000000 R08: ffffffff82170bc3 R09: 1ffffffff2038026
[ 60.069234][ T5835] R10: dffffc0000000000 R11: fffffbfff2038027 R12: ffff8880730c1aa0
[ 60.077256][ T5835] R13: dffffc0000000000 R14: ffff8880730c1a58 R15: dffffc0000000000
[ 60.085268][ T5835] FS: 000055556143e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
[ 60.094243][ T5835] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 60.100838][ T5835] CR2: 000000000066c7e0 CR3: 000000007cdc8000 CR4: 00000000003526f0
[ 60.108853][ T5835] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 60.116893][ T5835] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 60.124953][ T5835] Call Trace:
[ 60.128239][ T5835]
[ 60.131161][ T5835] ? __warn+0x168/0x4e0
[ 60.135361][ T5835] ? drop_nlink+0xc4/0x110
[ 60.139799][ T5835] ? report_bug+0x2b3/0x500
[ 60.144352][ T5835] ? drop_nlink+0xc4/0x110
[ 60.148794][ T5835] ? handle_bug+0x60/0x90
[ 60.153200][ T5835] ? exc_invalid_op+0x1a/0x50
[ 60.157905][ T5835] ? asm_exc_invalid_op+0x1a/0x20
[ 60.162993][ T5835] ? drop_nlink+0x43/0x110
[ 60.167425][ T5835] ? drop_nlink+0xc3/0x110
[ 60.171835][ T5835] ? drop_nlink+0xc4/0x110
[ 60.176321][ T5835] ? drop_nlink+0xc3/0x110
[ 60.180756][ T5835] f2fs_drop_nlink+0xd6/0x380
[ 60.185500][ T5835] f2fs_unlink+0x47f/0x960
[ 60.189938][ T5835] ? __pfx_f2fs_unlink+0x10/0x10
[ 60.194925][ T5835] ? bpf_lsm_inode_unlink+0x9/0x10
[ 60.200049][ T5835] ? security_inode_unlink+0xd9/0x340
[ 60.205471][ T5835] vfs_unlink+0x365/0x650
[ 60.209829][ T5835] do_unlinkat+0x4ae/0x830
[ 60.214306][ T5835] ? __pfx_do_unlinkat+0x10/0x10
[ 60.219259][ T5835] ? __might_fault+0xaa/0x120
[ 60.224044][ T5835] ? __might_fault+0xc6/0x120
[ 60.228735][ T5835] ? strncpy_from_user+0x13a/0x260
[ 60.233923][ T5835] ? getname_flags+0x1e3/0x540
[ 60.238707][ T5835] __x64_sys_unlinkat+0xcc/0xf0
[ 60.243607][ T5835] do_syscall_64+0xf3/0x230
[ 60.248123][ T5835] ? clear_bhb_loop+0x35/0x90
[ 60.252944][ T5835] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 60.258854][ T5835] RIP: 0033:0x7f731c65b5f9
[ 60.263318][ T5835] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 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
[ 60.282974][ T5835] RSP: 002b:00007ffe666d68f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
[ 60.291382][ T5835] RAX: ffffffffffffffda RBX: 00007ffe666d6ad8 RCX: 00007f731c65b5f9
[ 60.299435][ T5835] RDX: 0000000000000000 RSI: 0000000020000380 RDI: 00000000ffffff9c
[ 60.307480][ T5835] RBP: 00007f731c6de610 R08: 00000000000105b7 R09: 0000000000000000
[ 60.315558][ T5835] R10: 00007ffe666d67c0 R11: 0000000000000246 R12: 0000000000000001
[ 60.323577][ T5835] R13: 00007ffe666d6ac8 R14: 0000000000000001 R15: 0000000000000001
[ 60.331572][ T5835]
[ 60.334640][ T5835] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 60.341924][ T5835] CPU: 0 UID: 0 PID: 5835 Comm: syz-executor941 Not tainted 6.12.0-syzkaller-07834-g06afb0f36106 #0
[ 60.352670][ T5835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
[ 60.362713][ T5835] Call Trace:
[ 60.365982][ T5835]
[ 60.368900][ T5835] dump_stack_lvl+0x241/0x360
[ 60.373571][ T5835] ? __pfx_dump_stack_lvl+0x10/0x10
[ 60.378753][ T5835] ? __pfx__printk+0x10/0x10
[ 60.383329][ T5835] ? _printk+0xd5/0x120
[ 60.387475][ T5835] ? __init_begin+0x41000/0x41000
[ 60.392489][ T5835] ? vscnprintf+0x5d/0x90
[ 60.396823][ T5835] panic+0x349/0x880
[ 60.400707][ T5835] ? __warn+0x177/0x4e0
[ 60.404848][ T5835] ? __pfx_panic+0x10/0x10
[ 60.409248][ T5835] ? show_trace_log_lvl+0x3b2/0x410
[ 60.414438][ T5835] __warn+0x34b/0x4e0
[ 60.418408][ T5835] ? drop_nlink+0xc4/0x110
[ 60.422822][ T5835] report_bug+0x2b3/0x500
[ 60.427148][ T5835] ? drop_nlink+0xc4/0x110
[ 60.431560][ T5835] handle_bug+0x60/0x90
[ 60.435704][ T5835] exc_invalid_op+0x1a/0x50
[ 60.440193][ T5835] asm_exc_invalid_op+0x1a/0x20
[ 60.445037][ T5835] RIP: 0010:drop_nlink+0xc4/0x110
[ 60.450062][ T5835] 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
[ 60.469661][ T5835] RSP: 0018:ffffc90003e57b98 EFLAGS: 00010293
[ 60.475729][ T5835] RAX: ffffffff82170c43 RBX: 1ffff1100e618354 RCX: ffff88807da58000
[ 60.483695][ T5835] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 60.491657][ T5835] RBP: 0000000000000000 R08: ffffffff82170bc3 R09: 1ffffffff2038026
[ 60.499623][ T5835] R10: dffffc0000000000 R11: fffffbfff2038027 R12: ffff8880730c1aa0
[ 60.507587][ T5835] R13: dffffc0000000000 R14: ffff8880730c1a58 R15: dffffc0000000000
[ 60.515558][ T5835] ? drop_nlink+0x43/0x110
[ 60.519972][ T5835] ? drop_nlink+0xc3/0x110
[ 60.524388][ T5835] ? drop_nlink+0xc3/0x110
[ 60.528802][ T5835] f2fs_drop_nlink+0xd6/0x380
[ 60.533483][ T5835] f2fs_unlink+0x47f/0x960
[ 60.537899][ T5835] ? __pfx_f2fs_unlink+0x10/0x10
[ 60.542840][ T5835] ? bpf_lsm_inode_unlink+0x9/0x10
[ 60.547948][ T5835] ? security_inode_unlink+0xd9/0x340
[ 60.553319][ T5835] vfs_unlink+0x365/0x650
[ 60.557652][ T5835] do_unlinkat+0x4ae/0x830
[ 60.562070][ T5835] ? __pfx_do_unlinkat+0x10/0x10
[ 60.567002][ T5835] ? __might_fault+0xaa/0x120
[ 60.571688][ T5835] ? __might_fault+0xc6/0x120
[ 60.576364][ T5835] ? strncpy_from_user+0x13a/0x260
[ 60.581474][ T5835] ? getname_flags+0x1e3/0x540
[ 60.586238][ T5835] __x64_sys_unlinkat+0xcc/0xf0
[ 60.591085][ T5835] do_syscall_64+0xf3/0x230
[ 60.595586][ T5835] ? clear_bhb_loop+0x35/0x90
[ 60.600269][ T5835] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 60.606155][ T5835] RIP: 0033:0x7f731c65b5f9
[ 60.610567][ T5835] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 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
[ 60.630163][ T5835] RSP: 002b:00007ffe666d68f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
[ 60.638573][ T5835] RAX: ffffffffffffffda RBX: 00007ffe666d6ad8 RCX: 00007f731c65b5f9
[ 60.646536][ T5835] RDX: 0000000000000000 RSI: 0000000020000380 RDI: 00000000ffffff9c
[ 60.654497][ T5835] RBP: 00007f731c6de610 R08: 00000000000105b7 R09: 0000000000000000
[ 60.662465][ T5835] R10: 00007ffe666d67c0 R11: 0000000000000246 R12: 0000000000000001
[ 60.670426][ T5835] R13: 00007ffe666d6ac8 R14: 0000000000000001 R15: 0000000000000001
[ 60.678406][ T5835]
[ 60.681674][ T5835] Kernel Offset: disabled
[ 60.686024][ T5835] Rebooting in 86400 seconds..