------------[ cut here ]------------
hook not found, pf 5 num 0
WARNING: CPU: 0 PID: 16707 at net/netfilter/core.c:514 __nf_unregister_net_hook+0x30a/0x700 net/netfilter/core.c:514
Modules linked in:
CPU: 0 UID: 0 PID: 16707 Comm: syz.6.2578 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__nf_unregister_net_hook+0x30a/0x700 net/netfilter/core.c:514
Code: bc 16 f8 05 01 90 48 8b 44 24 10 0f b6 04 28 84 c0 0f 85 e3 03 00 00 41 8b 17 48 c7 c7 20 7d 72 8c 44 89 ee e8 17 3b 14 f8 90 <0f> 0b 90 90 e9 d8 01 00 00 e8 48 63 d7 01 89 c3 31 ff 89 c6 e8 3d
RSP: 0018:ffffc9000d2974b8 EFLAGS: 00010246
RAX: 297c9d6c825fa400 RBX: ffff88805c270380 RCX: ffff888072748000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: dffffc0000000000 R08: ffff8880b8824293 R09: 1ffff11017104852
R10: dffffc0000000000 R11: ffffed1017104853 R12: ffff8880505f2480
R13: 0000000000000005 R14: ffff88806a1b8488 R15: ffff88802b3a33bc
FS:  0000000000000000(0000) GS:ffff88812613d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000001c5000 CR3: 0000000054c3c000 CR4: 00000000003526f0
DR0: 0000000000001880 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nft_unregister_flowtable_ops net/netfilter/nf_tables_api.c:8979 [inline]
 nft_flowtable_event net/netfilter/nf_tables_api.c:9758 [inline]
 __nf_tables_flowtable_event+0x5bf/0x8c0 net/netfilter/nf_tables_api.c:9803
 nf_tables_flowtable_event+0x103/0x160 net/netfilter/nf_tables_api.c:9834
 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 unregister_netdevice_many_notify+0x1860/0x2390 net/core/dev.c:12284
 unregister_netdevice_many net/core/dev.c:12347 [inline]
 unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12161
 unregister_netdevice include/linux/netdevice.h:3389 [inline]
 __tun_detach+0x6d9/0x15d0 drivers/net/tun.c:621
 tun_detach drivers/net/tun.c:637 [inline]
 tun_chr_close+0x10a/0x1c0 drivers/net/tun.c:3436
 __fput+0x44c/0xa70 fs/file_table.c:468
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:966
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f236898efc9
Code: Unable to access opcode bytes at 0x7f236898ef9f.
RSP: 002b:00007f23697c5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000000024 RBX: 00007f2368be6180 RCX: 00007f236898efc9
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 000000000000004a
RBP: 00007f2368a11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2368be6218 R14: 00007f2368be6180 R15: 00007f2368d0fa28
 </TASK>