syzbot

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kernel BUG at fs/notify/dnotify/dnotify.c:136!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 1230 Comm: kworker/u4:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound fsnotify_mark_destroy_workfn
RIP: 0010:dnotify_free_mark+0x57/0x60 fs/notify/dnotify/dnotify.c:136
Code: 4c 89 f7 e8 7b 9f de ff 49 83 3e 00 75 17 e8 80 31 87 ff 48 8b 3d 51 f3 4b 0c 48 89 de 5b 41 5e e9 ae ce dd ff e8 69 31 87 ff <0f> 0b cc cc cc cc cc cc cc f3 0f 1e fa 55 41 57 41 56 41 55 41 54
RSP: 0018:ffffc90004aafae8 EFLAGS: 00010293
RAX: ffffffff81fe5f57 RBX: ffff888024258000 RCX: ffff8880243e9e00
RDX: 0000000000000000 RSI: ffffffff8aaabce0 RDI: ffff888024258000
RBP: ffffc90004aafbb0 R08: ffffffff90d945bf R09: 1ffffffff21b28b7
R10: dffffc0000000000 R11: fffffbfff21b28b8 R12: 1ffff1100484b002
R13: dffffc0000000000 R14: ffff888024258080 R15: ffffffff8ab875c8
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0038f1000 CR3: 000000007c352000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 fsnotify_final_mark_destroy fs/notify/mark.c:304 [inline]
 fsnotify_mark_destroy_workfn+0x253/0x2e0 fs/notify/mark.c:928
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dnotify_free_mark+0x57/0x60 fs/notify/dnotify/dnotify.c:136
Code: 4c 89 f7 e8 7b 9f de ff 49 83 3e 00 75 17 e8 80 31 87 ff 48 8b 3d 51 f3 4b 0c 48 89 de 5b 41 5e e9 ae ce dd ff e8 69 31 87 ff <0f> 0b cc cc cc cc cc cc cc f3 0f 1e fa 55 41 57 41 56 41 55 41 54
RSP: 0018:ffffc90004aafae8 EFLAGS: 00010293
RAX: ffffffff81fe5f57 RBX: ffff888024258000 RCX: ffff8880243e9e00
RDX: 0000000000000000 RSI: ffffffff8aaabce0 RDI: ffff888024258000
RBP: ffffc90004aafbb0 R08: ffffffff90d945bf R09: 1ffffffff21b28b7
R10: dffffc0000000000 R11: fffffbfff21b28b8 R12: 1ffff1100484b002
R13: dffffc0000000000 R14: ffff888024258080 R15: ffffffff8ab875c8
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd33446d000 CR3: 000000007c355000 CR4: 00000000003506e0