------------[ cut here ]------------
1
WARNING: net/netfilter/core.c:329 at nf_hook_entry_head+0x23e/0x2c0 net/netfilter/core.c:329, CPU#1: kworker/u8:43/15021
Modules linked in:
CPU: 1 UID: 0 PID: 15021 Comm: kworker/u8:43 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Workqueue: netns cleanup_net
RIP: 0010:nf_hook_entry_head+0x23e/0x2c0 net/netfilter/core.c:329
Code: 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ff e8 dd b7 79 f8 4d 39 37 74 36 e8 c3 67 11 f8 90 <0f> 0b 90 31 db 48 89 d8 5b 41 5e 41 5f 5d e9 bf 03 e8 01 cc e8 a9
RSP: 0018:ffffc9000514f7a0 EFLAGS: 00010293
RAX: ffffffff89b2ef4b RBX: ffff88805a42c000 RCX: ffff888026b45b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888026b45b80 R09: 0000000000000006
R10: 000000000000000a R11: 0000000000000000 R12: ffff888054de8000
R13: 0000000000000005 R14: ffff888054de8000 R15: ffff88805a42c108
FS:  0000000000000000(0000) GS:ffff8881257ea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000007a2ce000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __nf_unregister_net_hook+0x74/0x6f0 net/netfilter/core.c:491
 nft_unregister_flowtable_ops net/netfilter/nf_tables_api.c:9041 [inline]
 __nft_unregister_flowtable_net_hooks net/netfilter/nf_tables_api.c:9056 [inline]
 __nft_release_hook net/netfilter/nf_tables_api.c:12045 [inline]
 __nft_release_hooks net/netfilter/nf_tables_api.c:12059 [inline]
 nf_tables_pre_exit_net+0x64a/0x900 net/netfilter/nf_tables_api.c:12210
 ops_pre_exit_list net/core/net_namespace.c:161 [inline]
 ops_undo_list+0x187/0x940 net/core/net_namespace.c:234
 cleanup_net+0x56b/0x800 net/core/net_namespace.c:704
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
 worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>