[   47.405684][  T901] ------------[ cut here ]------------
[   47.413407][  T901] hook not found, pf 3 num 0
[   47.413515][  T901] WARNING: CPU: 0 PID: 901 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x17a/0x560
[   47.430596][  T901] Modules linked in:
[   47.434788][  T901] CPU: 1 PID: 901 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0
[   47.445084][  T901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.459113][  T901] Workqueue: netns cleanup_net
[   47.464807][  T901] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560
[   47.472117][  T901] Code: 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a7 03 00 00 8b 53 1c 44 89 e6 48 c7 c7 00 c9 9d 89 4c 89 04 24 e8 d7 7d 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10
[   47.493990][  T901] RSP: 0018:ffffc90003a2fbf0 EFLAGS: 00010282
[   47.501105][  T901] RAX: 0000000000000000 RBX: ffff8880226e5900 RCX: 0000000000000000
[   47.510675][  T901] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000745f70
[   47.521453][  T901] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba01fa5b
[   47.531180][  T901] R10: ffffed1017403f4b R11: 0000000000000001 R12: 0000000000000003
[   47.541363][  T901] R13: ffff888014a20000 R14: ffff8880226e591c R15: ffff888014a20f20
[   47.550239][  T901] FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
[   47.561066][  T901] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.568095][  T901] CR2: 00007f1d584da000 CR3: 0000000020437000 CR4: 00000000001506e0
[   47.576537][  T901] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   47.584737][  T901] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   47.593622][  T901] Call Trace:
[   47.598136][  T901]  nf_unregister_net_hooks+0xb1/0xf0
[   47.604187][  T901]  cleanup_net+0x3a4/0x990
[   47.609004][  T901]  ? ops_free_list.part.0+0x2d0/0x2d0
[   47.615402][  T901]  ? lock_is_held_type+0xd5/0x130
[   47.620696][  T901]  process_one_work+0x84c/0x13b0
[   47.626390][  T901]  ? lock_release+0x710/0x710
[   47.631320][  T901]  ? pwq_dec_nr_in_flight+0x2b0/0x2b0
[   47.636811][  T901]  ? rwlock_bug.part.0+0x90/0x90
[   47.642811][  T901]  ? _raw_spin_lock_irq+0x41/0x50
[   47.648844][  T901]  worker_thread+0x598/0xf80
[   47.654595][  T901]  ? __kthread_parkme+0xa2/0x1c0
[   47.660081][  T901]  ? process_one_work+0x13b0/0x13b0
[   47.665793][  T901]  kthread+0x36f/0x450
[   47.671539][  T901]  ? _raw_spin_unlock_irq+0x1f/0x40
[   47.677282][  T901]  ? __kthread_bind_mask+0x90/0x90
[   47.682746][  T901]  ret_from_fork+0x1f/0x30
[   47.687465][  T901] Kernel panic - not syncing: panic_on_warn set ...
[   47.694313][  T901] CPU: 1 PID: 901 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0
[   47.702625][  T901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.713718][  T901] Workqueue: netns cleanup_net
[   47.718581][  T901] Call Trace:
[   47.721957][  T901]  dump_stack+0x93/0xc2
[   47.726571][  T901]  panic+0x256/0x4eb
[   47.730919][  T901]  ? __warn_printk+0xee/0xee
[   47.736304][  T901]  ? __nf_unregister_net_hook+0x17a/0x560
[   47.742556][  T901]  __warn.cold+0x2b/0x35
[   47.747063][  T901]  ? __nf_unregister_net_hook+0x17a/0x560
[   47.753042][  T901]  report_bug+0x15a/0x1b0
[   47.757541][  T901]  handle_bug+0x3c/0x60
[   47.761982][  T901]  exc_invalid_op+0x14/0x40
[   47.766559][  T901]  asm_exc_invalid_op+0x12/0x20
[   47.771484][  T901] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560
[   47.778067][  T901] Code: 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a7 03 00 00 8b 53 1c 44 89 e6 48 c7 c7 00 c9 9d 89 4c 89 04 24 e8 d7 7d 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10
[   47.798330][  T901] RSP: 0018:ffffc90003a2fbf0 EFLAGS: 00010282
[   47.804812][  T901] RAX: 0000000000000000 RBX: ffff8880226e5900 RCX: 0000000000000000
[   47.813641][  T901] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000745f70
[   47.822039][  T901] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba01fa5b
[   47.830539][  T901] R10: ffffed1017403f4b R11: 0000000000000001 R12: 0000000000000003
[   47.838828][  T901] R13: ffff888014a20000 R14: ffff8880226e591c R15: ffff888014a20f20
[   47.848554][  T901]  nf_unregister_net_hooks+0xb1/0xf0
[   47.854083][  T901]  cleanup_net+0x3a4/0x990
[   47.858682][  T901]  ? ops_free_list.part.0+0x2d0/0x2d0
[   47.864311][  T901]  ? lock_is_held_type+0xd5/0x130
[   47.869700][  T901]  process_one_work+0x84c/0x13b0
[   47.874724][  T901]  ? lock_release+0x710/0x710
[   47.879597][  T901]  ? pwq_dec_nr_in_flight+0x2b0/0x2b0
[   47.885165][  T901]  ? rwlock_bug.part.0+0x90/0x90
[   47.890188][  T901]  ? _raw_spin_lock_irq+0x41/0x50
[   47.895230][  T901]  worker_thread+0x598/0xf80
[   47.899956][  T901]  ? __kthread_parkme+0xa2/0x1c0
[   47.904970][  T901]  ? process_one_work+0x13b0/0x13b0
[   47.910485][  T901]  kthread+0x36f/0x450
[   47.914833][  T901]  ? _raw_spin_unlock_irq+0x1f/0x40
[   47.920672][  T901]  ? __kthread_bind_mask+0x90/0x90
[   47.926217][  T901]  ret_from_fork+0x1f/0x30
[   47.933233][  T901] Kernel Offset: disabled
[   47.938372][  T901] Rebooting in 86400 seconds..