[   51.159401][  T162] ------------[ cut here ]------------
[   51.165424][  T162] hook not found, pf 3 num 0
[   51.165507][  T162] WARNING: CPU: 1 PID: 162 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x17a/0x560
[   51.180760][  T162] Modules linked in:
[   51.185065][  T162] CPU: 1 PID: 162 Comm: kworker/u4:3 Not tainted 5.12.0-rc7-syzkaller #0
[   51.193987][  T162] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.204769][  T162] Workqueue: netns cleanup_net
[   51.209569][  T162] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560
[   51.216035][  T162] 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 20 bc 9e 89 4c 89 04 24 e8 6e 3a 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10
[   51.236437][  T162] RSP: 0018:ffffc900010afbf0 EFLAGS: 00010282
[   51.243155][  T162] RAX: 0000000000000000 RBX: ffff888021db7b00 RCX: 0000000000000000
[   51.251239][  T162] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000215f70
[   51.259440][  T162] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba11fa1b
[   51.268004][  T162] R10: ffffed1017423f43 R11: 0000000000000001 R12: 0000000000000003
[   51.276287][  T162] R13: ffff888028f58000 R14: ffff888021db7b1c R15: ffff888028f58f60
[   51.284416][  T162] FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
[   51.293602][  T162] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   51.300718][  T162] CR2: 00007f02c17486c0 CR3: 000000000a68e000 CR4: 00000000001506e0
[   51.309373][  T162] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   51.317420][  T162] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   51.325835][  T162] Call Trace:
[   51.329126][  T162]  nf_unregister_net_hooks+0xb1/0xf0
[   51.335004][  T162]  cleanup_net+0x3a4/0x990
[   51.339536][  T162]  ? do_raw_spin_lock+0x120/0x2b0
[   51.345081][  T162]  ? ops_free_list.part.0+0x2d0/0x2d0
[   51.351109][  T162]  ? rwlock_bug.part.0+0x90/0x90
[   51.356744][  T162]  process_one_work+0x84c/0x13b0
[   51.361710][  T162]  ? lock_release+0x720/0x720
[   51.367293][  T162]  ? pwq_dec_nr_in_flight+0x2b0/0x2b0
[   51.373072][  T162]  ? rwlock_bug.part.0+0x90/0x90
[   51.378191][  T162]  ? _raw_spin_lock_irq+0x41/0x50
[   51.383691][  T162]  worker_thread+0x598/0xf80
[   51.388478][  T162]  ? process_one_work+0x13b0/0x13b0
[   51.394180][  T162]  kthread+0x36f/0x450
[   51.398410][  T162]  ? _raw_spin_unlock_irq+0x1f/0x40
[   51.404087][  T162]  ? __kthread_bind_mask+0x90/0x90
[   51.409324][  T162]  ret_from_fork+0x1f/0x30
[   51.414474][  T162] Kernel panic - not syncing: panic_on_warn set ...
[   51.421066][  T162] CPU: 0 PID: 162 Comm: kworker/u4:3 Not tainted 5.12.0-rc7-syzkaller #0
[   51.429557][  T162] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   51.440016][  T162] Workqueue: netns cleanup_net
[   51.445117][  T162] Call Trace:
[   51.448382][  T162]  dump_stack+0xa5/0xe6
[   51.452513][  T162]  panic+0x256/0x4eb
[   51.456379][  T162]  ? __warn_printk+0xee/0xee
[   51.460949][  T162]  ? __nf_unregister_net_hook+0x17a/0x560
[   51.466638][  T162]  __warn.cold+0x2b/0x35
[   51.470878][  T162]  ? __nf_unregister_net_hook+0x17a/0x560
[   51.476680][  T162]  report_bug+0x15a/0x1b0
[   51.480996][  T162]  handle_bug+0x3c/0x60
[   51.485163][  T162]  exc_invalid_op+0x14/0x40
[   51.489661][  T162]  asm_exc_invalid_op+0x12/0x20
[   51.494496][  T162] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560
[   51.500970][  T162] 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 20 bc 9e 89 4c 89 04 24 e8 6e 3a 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10
[   51.521952][  T162] RSP: 0018:ffffc900010afbf0 EFLAGS: 00010282
[   51.528029][  T162] RAX: 0000000000000000 RBX: ffff888021db7b00 RCX: 0000000000000000
[   51.536115][  T162] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000215f70
[   51.544072][  T162] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba11fa1b
[   51.552349][  T162] R10: ffffed1017423f43 R11: 0000000000000001 R12: 0000000000000003
[   51.560923][  T162] R13: ffff888028f58000 R14: ffff888021db7b1c R15: ffff888028f58f60
[   51.569042][  T162]  nf_unregister_net_hooks+0xb1/0xf0
[   51.574324][  T162]  cleanup_net+0x3a4/0x990
[   51.578719][  T162]  ? do_raw_spin_lock+0x120/0x2b0
[   51.583723][  T162]  ? ops_free_list.part.0+0x2d0/0x2d0
[   51.589200][  T162]  ? rwlock_bug.part.0+0x90/0x90
[   51.594315][  T162]  process_one_work+0x84c/0x13b0
[   51.599670][  T162]  ? lock_release+0x720/0x720
[   51.609013][  T162]  ? pwq_dec_nr_in_flight+0x2b0/0x2b0
[   51.614397][  T162]  ? rwlock_bug.part.0+0x90/0x90
[   51.619937][  T162]  ? _raw_spin_lock_irq+0x41/0x50
[   51.625312][  T162]  worker_thread+0x598/0xf80
[   51.630003][  T162]  ? process_one_work+0x13b0/0x13b0
[   51.635279][  T162]  kthread+0x36f/0x450
[   51.639454][  T162]  ? _raw_spin_unlock_irq+0x1f/0x40
[   51.645184][  T162]  ? __kthread_bind_mask+0x90/0x90
[   51.650398][  T162]  ret_from_fork+0x1f/0x30
[   51.656763][  T162] Kernel Offset: disabled
[   51.661584][  T162] Rebooting in 86400 seconds..