[ 42.705802][ T556] ------------[ cut here ]------------ [ 42.712464][ T556] hook not found, pf 3 num 0 [ 42.712541][ T556] WARNING: CPU: 1 PID: 556 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x17a/0x560 [ 42.727632][ T556] Modules linked in: [ 42.732854][ T556] CPU: 1 PID: 556 Comm: kworker/u4:6 Not tainted 5.12.0-syzkaller #0 [ 42.742378][ T556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.753617][ T556] Workqueue: netns cleanup_net [ 42.759037][ T556] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560 [ 42.767333][ T556] 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 40 39 9d 89 4c 89 04 24 e8 d4 86 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10 [ 42.788685][ T556] RSP: 0018:ffffc90002c0fbf0 EFLAGS: 00010282 [ 42.795881][ T556] RAX: 0000000000000000 RBX: ffff88814715fc00 RCX: 0000000000000000 [ 42.804626][ T556] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000581f70 [ 42.813284][ T556] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba11fa5b [ 42.823417][ T556] R10: ffffed1017423f4b R11: 0000000000000001 R12: 0000000000000003 [ 42.831797][ T556] R13: ffff88802db70000 R14: ffff88814715fc1c R15: ffff88802db70f20 [ 42.840441][ T556] FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 42.851274][ T556] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.858949][ T556] CR2: 00007fcabe4fd020 CR3: 0000000024dd9000 CR4: 00000000001506f0 [ 42.868233][ T556] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.877207][ T556] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.886071][ T556] Call Trace: [ 42.889879][ T556] nf_unregister_net_hooks+0xb1/0xf0 [ 42.895430][ T556] cleanup_net+0x3a4/0x990 [ 42.902116][ T556] ? ops_free_list.part.0+0x2d0/0x2d0 [ 42.907523][ T556] ? lock_is_held_type+0xd5/0x130 [ 42.912908][ T556] process_one_work+0x84c/0x13b0 [ 42.918373][ T556] ? lock_release+0x710/0x710 [ 42.923667][ T556] ? pwq_dec_nr_in_flight+0x2b0/0x2b0 [ 42.930400][ T556] ? rwlock_bug.part.0+0x90/0x90 [ 42.935600][ T556] ? _raw_spin_lock_irq+0x41/0x50 [ 42.941965][ T556] worker_thread+0x598/0xf80 [ 42.947155][ T556] ? __kthread_parkme+0xa2/0x1c0 [ 42.952768][ T556] ? process_one_work+0x13b0/0x13b0 [ 42.958211][ T556] kthread+0x36f/0x450 [ 42.963678][ T556] ? _raw_spin_unlock_irq+0x1f/0x40 [ 42.970087][ T556] ? __kthread_bind_mask+0x90/0x90 [ 42.975789][ T556] ret_from_fork+0x1f/0x30 [ 42.980713][ T556] Kernel panic - not syncing: panic_on_warn set ... [ 42.987698][ T556] CPU: 1 PID: 556 Comm: kworker/u4:6 Not tainted 5.12.0-syzkaller #0 [ 42.996325][ T556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.006941][ T556] Workqueue: netns cleanup_net [ 43.012365][ T556] Call Trace: [ 43.015762][ T556] dump_stack+0x93/0xc2 [ 43.020641][ T556] panic+0x256/0x4eb [ 43.025114][ T556] ? __warn_printk+0xee/0xee [ 43.029920][ T556] ? __nf_unregister_net_hook+0x17a/0x560 [ 43.035629][ T556] __warn.cold+0x2b/0x35 [ 43.039967][ T556] ? __nf_unregister_net_hook+0x17a/0x560 [ 43.045775][ T556] report_bug+0x15a/0x1b0 [ 43.050275][ T556] handle_bug+0x3c/0x60 [ 43.054846][ T556] exc_invalid_op+0x14/0x40 [ 43.059421][ T556] asm_exc_invalid_op+0x12/0x20 [ 43.064457][ T556] RIP: 0010:__nf_unregister_net_hook+0x17a/0x560 [ 43.070854][ T556] 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 40 39 9d 89 4c 89 04 24 e8 d4 86 62 01 <0f> 0b 4c 8b 04 24 e9 ba 00 00 00 48 89 ea 48 c1 e2 04 49 8d 7c 10 [ 43.091087][ T556] RSP: 0018:ffffc90002c0fbf0 EFLAGS: 00010282 [ 43.097308][ T556] RAX: 0000000000000000 RBX: ffff88814715fc00 RCX: 0000000000000000 [ 43.105693][ T556] RDX: 0000000000000001 RSI: 0000000000000004 RDI: fffff52000581f70 [ 43.113851][ T556] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880ba11fa5b [ 43.122002][ T556] R10: ffffed1017423f4b R11: 0000000000000001 R12: 0000000000000003 [ 43.130321][ T556] R13: ffff88802db70000 R14: ffff88814715fc1c R15: ffff88802db70f20 [ 43.138592][ T556] nf_unregister_net_hooks+0xb1/0xf0 [ 43.144038][ T556] cleanup_net+0x3a4/0x990 [ 43.148792][ T556] ? ops_free_list.part.0+0x2d0/0x2d0 [ 43.154423][ T556] ? lock_is_held_type+0xd5/0x130 [ 43.159593][ T556] process_one_work+0x84c/0x13b0 [ 43.164655][ T556] ? lock_release+0x710/0x710 [ 43.170035][ T556] ? pwq_dec_nr_in_flight+0x2b0/0x2b0 [ 43.175493][ T556] ? rwlock_bug.part.0+0x90/0x90 [ 43.180438][ T556] ? _raw_spin_lock_irq+0x41/0x50 [ 43.185760][ T556] worker_thread+0x598/0xf80 [ 43.190336][ T556] ? __kthread_parkme+0xa2/0x1c0 [ 43.195263][ T556] ? process_one_work+0x13b0/0x13b0 [ 43.200547][ T556] kthread+0x36f/0x450 [ 43.204809][ T556] ? _raw_spin_unlock_irq+0x1f/0x40 [ 43.210411][ T556] ? __kthread_bind_mask+0x90/0x90 [ 43.215704][ T556] ret_from_fork+0x1f/0x30 [ 43.222078][ T556] Kernel Offset: disabled [ 43.226672][ T556] Rebooting in 86400 seconds..