[   44.499973][  T155] WARNING: CPU: 0 PID: 155 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x17a/0x560
[   44.517728][  T155] Modules linked in:
[   44.521667][  T155] CPU: 0 PID: 155 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0
[   44.530581][  T155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.540816][  T155] Workqueue: netns cleanup_net
[   44.545603][  T155] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560
[   44.552309][  T155] 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 71 9f 89 4c 89 04 24 e8 28 a3 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10
[   44.573106][  T155] RSP: 0018:ffffc9000157fbf0 EFLAGS: 00010282
[   44.580169][  T155] RAX: 0000000000000000 RBX: ffff8880200bf800 RCX: 0000000000000000
[   44.588721][  T155] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff520002aff70
[   44.597149][  T155] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba01fa5b
[   44.605177][  T155] R10: ffffed1017403f4b R11: 0000000000000001 R12: 0000000000000003
[   44.614282][  T155] R13: ffff888013f20000 R14: ffff8880200bf81c R15: ffff888013f20f20
[   44.623260][  T155] FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
[   44.633007][  T155] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.640182][  T155] CR2: 00007f24ea5f2000 CR3: 0000000013ff6000 CR4: 00000000001506f0
[   44.648792][  T155] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   44.657052][  T155] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   44.665038][  T155] Call Trace:
[   44.669284][  T155]  nf_unregister_net_hooks+0xb1/0xf0
[   44.674693][  T155]  cleanup_net+0x3a4/0x990
[   44.679305][  T155]  ? ops_free_list.part.0+0x2d0/0x2d0
[   44.685049][  T155]  process_one_work+0x84c/0x13b0
[   44.690822][  T155]  ? lock_release+0x720/0x720
[   44.695654][  T155]  ? pwq_dec_nr_in_flight+0x2b0/0x2b0
[   44.701587][  T155]  ? rwlock_bug.part.0+0x90/0x90
[   44.707312][  T155]  ? _raw_spin_lock_irq+0x41/0x50
[   44.712759][  T155]  worker_thread+0x598/0xf80
[   44.718630][  T155]  ? process_one_work+0x13b0/0x13b0
[   44.724064][  T155]  kthread+0x36f/0x450
[   44.729598][  T155]  ? _raw_spin_unlock_irq+0x1f/0x40
[   44.734946][  T155]  ? __kthread_bind_mask+0x90/0x90
[   44.741030][  T155]  ret_from_fork+0x1f/0x30
[   44.745457][  T155] Kernel panic - not syncing: panic_on_warn set ...
[   44.752041][  T155] CPU: 0 PID: 155 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0
[   44.760413][  T155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.770686][  T155] Workqueue: netns cleanup_net
[   44.775435][  T155] Call Trace:
[   44.778898][  T155]  dump_stack+0xa5/0xe6
[   44.783031][  T155]  panic+0x256/0x4eb
[   44.786904][  T155]  ? __warn_printk+0xee/0xee
[   44.791489][  T155]  ? __nf_unregister_net_hook+0x17a/0x560
[   44.797189][  T155]  __warn.cold+0x2b/0x35
[   44.801430][  T155]  ? __nf_unregister_net_hook+0x17a/0x560
[   44.807141][  T155]  report_bug+0x15a/0x1b0
[   44.811452][  T155]  handle_bug+0x3c/0x60
[   44.815598][  T155]  exc_invalid_op+0x14/0x40
[   44.820095][  T155]  asm_exc_invalid_op+0x12/0x20
[   44.824953][  T155] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560
[   44.831299][  T155] 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 71 9f 89 4c 89 04 24 e8 28 a3 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10
[   44.851328][  T155] RSP: 0018:ffffc9000157fbf0 EFLAGS: 00010282
[   44.857386][  T155] RAX: 0000000000000000 RBX: ffff8880200bf800 RCX: 0000000000000000
[   44.865354][  T155] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff520002aff70
[   44.873311][  T155] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba01fa5b
[   44.881382][  T155] R10: ffffed1017403f4b R11: 0000000000000001 R12: 0000000000000003
[   44.889419][  T155] R13: ffff888013f20000 R14: ffff8880200bf81c R15: ffff888013f20f20
[   44.897390][  T155]  nf_unregister_net_hooks+0xb1/0xf0
[   44.902665][  T155]  cleanup_net+0x3a4/0x990
[   44.907066][  T155]  ? ops_free_list.part.0+0x2d0/0x2d0
[   44.912791][  T155]  process_one_work+0x84c/0x13b0
[   44.917716][  T155]  ? lock_release+0x720/0x720
[   44.922465][  T155]  ? pwq_dec_nr_in_flight+0x2b0/0x2b0
[   44.927922][  T155]  ? rwlock_bug.part.0+0x90/0x90
[   44.932854][  T155]  ? _raw_spin_lock_irq+0x41/0x50
[   44.937941][  T155]  worker_thread+0x598/0xf80
[   44.942513][  T155]  ? process_one_work+0x13b0/0x13b0
[   44.947810][  T155]  kthread+0x36f/0x450
[   44.951993][  T155]  ? _raw_spin_unlock_irq+0x1f/0x40
[   44.957194][  T155]  ? __kthread_bind_mask+0x90/0x90
[   44.962481][  T155]  ret_from_fork+0x1f/0x30
[   44.968351][  T155] Kernel Offset: disabled
[   44.972926][  T155] Rebooting in 86400 seconds..