[    4.968214] ------------[ cut here ]------------
[    4.968297] refcount_t: underflow; use-after-free.
[    4.968366] WARNING: CPU: 0 PID: 67 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    4.968459] Modules linked in: nft_synproxy nf_synproxy_core nft_ct nf_tables veth nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
[    4.968584] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    4.968679] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    4.968746] Workqueue: netns cleanup_net
[    4.968788] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    4.968846] Code: 93 e8 18 ed b9 ff 90 0f 0b 90 90 c3 80 3d d9 ea ea 00 00 75 89 c6 05 d0 ea ea 00 01 90 48 c7 c7 78 de 71 93 e8 f5 ec b9 ff 90 <0f> 0b 90 90 c3 80 3d b4 ea ea 00 00 0f 85 62 ff ff ff c6 05 a7 ea
[    4.969024] RSP: 0018:ffff9c0c80257d50 EFLAGS: 00010286
[    4.969080] RAX: 0000000000000000 RBX: ffff9c0c80257d60 RCX: 00000000ffffdfff
[    4.969164] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    4.969247] RBP: ffff9c0c80257868 R08: ffffffff93b56d28 R09: 00000000ffffdfff
[    4.969322] R10: ffffffff93a76d40 R11: ffffffff93b26d40 R12: dead000000000122
[    4.969399] R13: 00000000fffb7f09 R14: 0000000000000001 R15: ffff8bfe44f3c000
[    4.969464] FS:  0000000000000000(0000) GS:ffff8bfeea9d8000(0000) knlGS:0000000000000000
[    4.969518] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.969565] CR2: 00005595a6704dec CR3: 000000000739b006 CR4: 0000000000772ef0
[    4.969622] PKRU: 55555554
[    4.969646] Call Trace:
[    4.969664]  <TASK>
[    4.969685]  netdev_run_todo+0x21a/0x550
[    4.969718]  ops_undo_list+0x1e3/0x1f0
[    4.969752]  cleanup_net+0x1b7/0x2b0
[    4.969783]  process_one_work+0x162/0x380
[    4.969814]  worker_thread+0x299/0x3c0
[    4.969839]  ? rescuer_thread+0x4c0/0x4c0
[    4.969869]  kthread+0x101/0x1f0
[    4.969900]  ? kthreads_online_cpu+0x110/0x110
[    4.969939]  ? kthreads_online_cpu+0x110/0x110
[    4.969973]  ret_from_fork+0x11c/0x140
[    4.970011]  ? kthreads_online_cpu+0x110/0x110
[    4.970059]  ret_from_fork_asm+0x11/0x20
[    4.970095]  </TASK>
[    4.970116] ---[ end trace 0000000000000000 ]---