[   51.032112][  T582] ------------[ cut here ]------------
[   51.037992][  T582] hook not found, pf 3 num 0
[   51.038112][  T582] WARNING: CPU: 0 PID: 582 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x17a/0x560
[   51.052877][  T582] Modules linked in:
[   51.056872][  T582] CPU: 0 PID: 582 Comm: kworker/u4:7 Not tainted 5.12.0-syzkaller #0
[   51.064931][  T582] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.076009][  T582] Workqueue: netns cleanup_net
[   51.080847][  T582] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560
[   51.087241][  T582] 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 cd 9d 89 4c 89 04 24 e8 de 83 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10
[   51.107110][  T582] RSP: 0018:ffffc90001e9fbf0 EFLAGS: 00010282
[   51.113582][  T582] RAX: 0000000000000000 RBX: ffff888021e1be00 RCX: 0000000000000000
[   51.121807][  T582] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff520003d3f70
[   51.129831][  T582] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba01fa5b
[   51.138061][  T582] R10: ffffed1017403f4b R11: 0000000000000001 R12: 0000000000000003
[   51.146025][  T582] R13: ffff888027f70000 R14: ffff888021e1be1c R15: ffff888027f70f20
[   51.154632][  T582] FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
[   51.164535][  T582] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   51.171245][  T582] CR2: 00007f67fb265000 CR3: 000000002748e000 CR4: 0000000000350ee0
[   51.179532][  T582] Call Trace:
[   51.183082][  T582]  nf_unregister_net_hooks+0xb1/0xf0
[   51.188426][  T582]  cleanup_net+0x3a4/0x990
[   51.193044][  T582]  ? ops_free_list.part.0+0x2d0/0x2d0
[   51.198792][  T582]  ? lock_is_held_type+0xd5/0x130
[   51.204369][  T582]  process_one_work+0x84c/0x13b0
[   51.209375][  T582]  ? lock_release+0x710/0x710
[   51.214209][  T582]  ? pwq_dec_nr_in_flight+0x2b0/0x2b0
[   51.219623][  T582]  ? rwlock_bug.part.0+0x90/0x90
[   51.224555][  T582]  ? _raw_spin_lock_irq+0x41/0x50
[   51.229621][  T582]  worker_thread+0x598/0xf80
[   51.234313][  T582]  ? __kthread_parkme+0xa2/0x1c0
[   51.239285][  T582]  ? process_one_work+0x13b0/0x13b0
[   51.244463][  T582]  kthread+0x36f/0x450
[   51.248590][  T582]  ? _raw_spin_unlock_irq+0x1f/0x40
[   51.253780][  T582]  ? __kthread_bind_mask+0x90/0x90
[   51.259134][  T582]  ret_from_fork+0x1f/0x30
[   51.263559][  T582] Kernel panic - not syncing: panic_on_warn set ...
[   51.270127][  T582] CPU: 0 PID: 582 Comm: kworker/u4:7 Not tainted 5.12.0-syzkaller #0
[   51.278166][  T582] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.289786][  T582] Workqueue: netns cleanup_net
[   51.294523][  T582] Call Trace:
[   51.297778][  T582]  dump_stack+0x93/0xc2
[   51.301905][  T582]  panic+0x256/0x4eb
[   51.305765][  T582]  ? __warn_printk+0xee/0xee
[   51.310426][  T582]  ? __nf_unregister_net_hook+0x17a/0x560
[   51.316121][  T582]  __warn.cold+0x2b/0x35
[   51.320343][  T582]  ? __nf_unregister_net_hook+0x17a/0x560
[   51.326043][  T582]  report_bug+0x15a/0x1b0
[   51.330356][  T582]  handle_bug+0x3c/0x60
[   51.334585][  T582]  exc_invalid_op+0x14/0x40
[   51.339080][  T582]  asm_exc_invalid_op+0x12/0x20
[   51.343910][  T582] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560
[   51.350222][  T582] 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 cd 9d 89 4c 89 04 24 e8 de 83 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10
[   51.370001][  T582] RSP: 0018:ffffc90001e9fbf0 EFLAGS: 00010282
[   51.376043][  T582] RAX: 0000000000000000 RBX: ffff888021e1be00 RCX: 0000000000000000
[   51.383994][  T582] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff520003d3f70
[   51.391949][  T582] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba01fa5b
[   51.399903][  T582] R10: ffffed1017403f4b R11: 0000000000000001 R12: 0000000000000003
[   51.407851][  T582] R13: ffff888027f70000 R14: ffff888021e1be1c R15: ffff888027f70f20
[   51.415807][  T582]  nf_unregister_net_hooks+0xb1/0xf0
[   51.421075][  T582]  cleanup_net+0x3a4/0x990
[   51.425472][  T582]  ? ops_free_list.part.0+0x2d0/0x2d0
[   51.430822][  T582]  ? lock_is_held_type+0xd5/0x130
[   51.435828][  T582]  process_one_work+0x84c/0x13b0
[   51.440754][  T582]  ? lock_release+0x710/0x710
[   51.445406][  T582]  ? pwq_dec_nr_in_flight+0x2b0/0x2b0
[   51.450759][  T582]  ? rwlock_bug.part.0+0x90/0x90
[   51.455688][  T582]  ? _raw_spin_lock_irq+0x41/0x50
[   51.460696][  T582]  worker_thread+0x598/0xf80
[   51.465271][  T582]  ? __kthread_parkme+0xa2/0x1c0
[   51.470187][  T582]  ? process_one_work+0x13b0/0x13b0
[   51.475361][  T582]  kthread+0x36f/0x450
[   51.479401][  T582]  ? _raw_spin_unlock_irq+0x1f/0x40
[   51.484571][  T582]  ? __kthread_bind_mask+0x90/0x90
[   51.489677][  T582]  ret_from_fork+0x1f/0x30
[   51.497698][  T582] Kernel Offset: disabled
[   51.502188][  T582] Rebooting in 86400 seconds..