[ 42.247608][ T40] ------------[ cut here ]------------ [ 42.253312][ T40] hook not found, pf 3 num 0 [ 42.253415][ T40] WARNING: CPU: 1 PID: 40 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x17a/0x560 [ 42.271145][ T40] Modules linked in: [ 42.275435][ T40] CPU: 0 PID: 40 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 42.284197][ T40] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.296410][ T40] Workqueue: netns cleanup_net [ 42.302806][ T40] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560 [ 42.310742][ T40] 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 37 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 [ 42.331312][ T40] RSP: 0018:ffffc90000eefbf0 EFLAGS: 00010282 [ 42.337681][ T40] RAX: 0000000000000000 RBX: ffff888144912a00 RCX: 0000000000000000 [ 42.346716][ T40] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff520001ddf70 [ 42.355374][ T40] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba11fa5b [ 42.364232][ T40] R10: ffffed1017423f4b R11: 0000000000000001 R12: 0000000000000003 [ 42.373241][ T40] R13: ffff888029110000 R14: ffff888144912a1c R15: ffff888029110f20 [ 42.381999][ T40] FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 42.391352][ T40] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.398075][ T40] CR2: 00007f2f6e0ab000 CR3: 0000000012df4000 CR4: 00000000001506e0 [ 42.406510][ T40] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.414719][ T40] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.423288][ T40] Call Trace: [ 42.426799][ T40] nf_unregister_net_hooks+0xb1/0xf0 [ 42.432958][ T40] cleanup_net+0x3a4/0x990 [ 42.437396][ T40] ? ops_free_list.part.0+0x2d0/0x2d0 [ 42.443391][ T40] ? lock_is_held_type+0xd5/0x130 [ 42.448558][ T40] process_one_work+0x84c/0x13b0 [ 42.453715][ T40] ? lock_release+0x710/0x710 [ 42.458488][ T40] ? pwq_dec_nr_in_flight+0x2b0/0x2b0 [ 42.464052][ T40] ? rwlock_bug.part.0+0x90/0x90 [ 42.469081][ T40] ? _raw_spin_lock_irq+0x41/0x50 [ 42.474206][ T40] worker_thread+0x598/0xf80 [ 42.478828][ T40] ? __kthread_parkme+0xa2/0x1c0 [ 42.484669][ T40] ? process_one_work+0x13b0/0x13b0 [ 42.491340][ T40] kthread+0x36f/0x450 [ 42.495756][ T40] ? _raw_spin_unlock_irq+0x1f/0x40 [ 42.501225][ T40] ? __kthread_bind_mask+0x90/0x90 [ 42.506462][ T40] ret_from_fork+0x1f/0x30 [ 42.511613][ T40] Kernel panic - not syncing: panic_on_warn set ... [ 42.518411][ T40] CPU: 0 PID: 40 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 42.527000][ T40] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.537608][ T40] Workqueue: netns cleanup_net [ 42.542488][ T40] Call Trace: [ 42.545958][ T40] dump_stack+0x93/0xc2 [ 42.550107][ T40] panic+0x256/0x4eb [ 42.554080][ T40] ? __warn_printk+0xee/0xee [ 42.558923][ T40] ? __nf_unregister_net_hook+0x17a/0x560 [ 42.564922][ T40] __warn.cold+0x2b/0x35 [ 42.569361][ T40] ? __nf_unregister_net_hook+0x17a/0x560 [ 42.575419][ T40] report_bug+0x15a/0x1b0 [ 42.579830][ T40] handle_bug+0x3c/0x60 [ 42.583970][ T40] exc_invalid_op+0x14/0x40 [ 42.588457][ T40] asm_exc_invalid_op+0x12/0x20 [ 42.593411][ T40] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560 [ 42.600115][ T40] 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 37 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 [ 42.619798][ T40] RSP: 0018:ffffc90000eefbf0 EFLAGS: 00010282 [ 42.625845][ T40] RAX: 0000000000000000 RBX: ffff888144912a00 RCX: 0000000000000000 [ 42.634806][ T40] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff520001ddf70 [ 42.642835][ T40] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba11fa5b [ 42.651169][ T40] R10: ffffed1017423f4b R11: 0000000000000001 R12: 0000000000000003 [ 42.659125][ T40] R13: ffff888029110000 R14: ffff888144912a1c R15: ffff888029110f20 [ 42.667197][ T40] nf_unregister_net_hooks+0xb1/0xf0 [ 42.672488][ T40] cleanup_net+0x3a4/0x990 [ 42.676890][ T40] ? ops_free_list.part.0+0x2d0/0x2d0 [ 42.682414][ T40] ? lock_is_held_type+0xd5/0x130 [ 42.687626][ T40] process_one_work+0x84c/0x13b0 [ 42.692724][ T40] ? lock_release+0x710/0x710 [ 42.697386][ T40] ? pwq_dec_nr_in_flight+0x2b0/0x2b0 [ 42.702823][ T40] ? rwlock_bug.part.0+0x90/0x90 [ 42.707847][ T40] ? _raw_spin_lock_irq+0x41/0x50 [ 42.712852][ T40] worker_thread+0x598/0xf80 [ 42.717427][ T40] ? __kthread_parkme+0xa2/0x1c0 [ 42.722347][ T40] ? process_one_work+0x13b0/0x13b0 [ 42.727522][ T40] kthread+0x36f/0x450 [ 42.731596][ T40] ? _raw_spin_unlock_irq+0x1f/0x40 [ 42.736852][ T40] ? __kthread_bind_mask+0x90/0x90 [ 42.742051][ T40] ret_from_fork+0x1f/0x30 [ 42.746709][ T40] Kernel Offset: disabled [ 42.751241][ T40] Rebooting in 86400 seconds..