------------[ cut here ]------------
1
WARNING: net/netfilter/core.c:329 at nf_hook_entry_head+0x23e/0x2c0 net/netfilter/core.c:329, CPU#0: kworker/u8:20/9085
Modules linked in:
CPU: 0 UID: 0 PID: 9085 Comm: kworker/u8:20 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
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 5d 66 69 f8 4d 39 37 74 36 e8 13 10 ff f7 90 <0f> 0b 90 31 db 48 89 d8 5b 41 5e 41 5f 5d c3 cc cc cc cc cc e8 f9
RSP: 0018:ffffc90004487820 EFLAGS: 00010293
RAX: ffffffff89c68d5b RBX: ffff8880562f0000 RCX: ffff888026f73d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888026f73d00 R09: 0000000000000006
R10: 000000000000000a R11: 0000000000000000 R12: ffff8880572a4c80
R13: 0000000000000005 R14: ffff8880572a4c80 R15: ffff8880562f0108
FS:  0000000000000000(0000) GS:ffff888125463000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007bce2000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 __nf_unregister_net_hook+0x74/0x6f0 net/netfilter/core.c:491
 nft_unregister_flowtable_ops net/netfilter/nf_tables_api.c:8905 [inline]
 __nft_unregister_flowtable_net_hooks net/netfilter/nf_tables_api.c:8920 [inline]
 __nft_release_hook net/netfilter/nf_tables_api.c:11904 [inline]
 __nft_release_hooks net/netfilter/nf_tables_api.c:11918 [inline]
 nf_tables_pre_exit_net+0x64a/0x900 net/netfilter/nf_tables_api.c:12069
 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:3275 [inline]
 process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358
 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>