------------[ cut here ]------------ WARNING: CPU: 1 PID: 30539 at net/netfilter/core.c:329 nf_hook_entry_head+0x23e/0x2c0 net/netfilter/core.c:329 Modules linked in: CPU: 1 UID: 0 PID: 30539 Comm: kworker/u8:8 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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 4d 7d b6 f8 4d 39 37 74 36 e8 83 bb 50 f8 90 <0f> 0b 90 31 db 48 89 d8 5b 41 5e 41 5f 5d e9 4f 3c da 01 cc e8 69 RSP: 0018:ffffc900057f7768 EFLAGS: 00010293 RAX: ffffffff896f47fb RBX: ffff88805100c000 RCX: ffff888064663c80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff888064663c80 R09: 0000000000000006 R10: 000000000000000a R11: 0000000000000000 R12: ffff8880655d0000 R13: 0000000000000005 R14: ffff8880655d0000 R15: ffff88805100c108 FS: 0000000000000000(0000) GS:ffff888126239000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1028e5f570 CR3: 000000005e3ae000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __nf_unregister_net_hook+0x74/0x700 net/netfilter/core.c:491 nft_unregister_flowtable_ops net/netfilter/nf_tables_api.c:8979 [inline] __nft_unregister_flowtable_net_hooks net/netfilter/nf_tables_api.c:8994 [inline] __nft_release_hook+0x180/0x350 net/netfilter/nf_tables_api.c:11987 __nft_release_hooks net/netfilter/nf_tables_api.c:12001 [inline] nf_tables_pre_exit_net+0xa7/0x110 net/netfilter/nf_tables_api.c:12152 ops_pre_exit_list net/core/net_namespace.c:161 [inline] ops_undo_list+0x187/0x990 net/core/net_namespace.c:234 cleanup_net+0x4d8/0x820 net/core/net_namespace.c:695 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245