[    3.782501] ------------[ cut here ]------------
[    3.782570] refcount_t: underflow; use-after-free.
[    3.782627] WARNING: CPU: 3 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.782695] Modules linked in: nft_ct nf_conntrack_netlink veth nft_nat nft_numgen nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables
[    3.782828] CPU: 3 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.782913] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.782960] Workqueue: netns cleanup_net
[    3.782993] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.783033] Code: 86 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 d1 86 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
[    3.783155] RSP: 0018:ffff9839c025fd50 EFLAGS: 00010286
[    3.783204] RAX: 0000000000000000 RBX: ffff9839c025fd60 RCX: 00000000ffffdfff
[    3.783260] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.783315] RBP: ffff9839c025f868 R08: ffffffff87156d28 R09: 00000000ffffdfff
[    3.783371] R10: ffffffff87076d40 R11: ffffffff87126d40 R12: dead000000000122
[    3.783421] R13: 00000000fffb7a64 R14: 0000000000000001 R15: ffff8d2205224000
[    3.783476] FS:  0000000000000000(0000) GS:ffff8d22b7558000(0000) knlGS:0000000000000000
[    3.783535] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.783583] CR2: 00007f358fcdc760 CR3: 0000000024841002 CR4: 0000000000772ef0
[    3.783641] PKRU: 55555554
[    3.783663] Call Trace:
[    3.783688]  <TASK>
[    3.783710]  netdev_run_todo+0x21a/0x550
[    3.783744]  ops_undo_list+0x1e3/0x1f0
[    3.783787]  cleanup_net+0x1b7/0x2b0
[    3.783818]  process_one_work+0x162/0x380
[    3.783862]  worker_thread+0x299/0x3c0
[    3.783903]  ? rescuer_thread+0x4c0/0x4c0
[    3.783935]  kthread+0x101/0x1f0
[    3.783968]  ? kthreads_online_cpu+0x110/0x110
[    3.784007]  ? kthreads_online_cpu+0x110/0x110
[    3.784047]  ret_from_fork+0x11c/0x140
[    3.784084]  ? kthreads_online_cpu+0x110/0x110
[    3.784118]  ret_from_fork_asm+0x11/0x20
[    3.784152]  </TASK>
[    3.784173] ---[ end trace 0000000000000000 ]---