[    2.424494] ip (251) used greatest stack depth: 12136 bytes left
[    3.806895] ------------[ cut here ]------------
[    3.807004] refcount_t: underflow; use-after-free.
[    3.807078] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.807238] 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
[    3.807426] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.807530] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.807600] Workqueue: netns cleanup_net
[    3.807649] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.807714] Code: 85 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 85 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
[    3.807926] RSP: 0018:ffffa15440067d50 EFLAGS: 00010286
[    3.807998] RAX: 0000000000000000 RBX: ffffa15440067d60 RCX: 00000000ffffdfff
[    3.808082] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.808175] RBP: ffffa15440067868 R08: ffffffff86156d28 R09: 00000000ffffdfff
[    3.808261] R10: ffffffff86076d40 R11: ffffffff86126d40 R12: dead000000000122
[    3.808348] R13: 00000000fffb7a7a R14: 0000000000000001 R15: ffff8fde45351000
[    3.808434] FS:  0000000000000000(0000) GS:ffff8fdef83d8000(0000) knlGS:0000000000000000
[    3.808538] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.808614] CR2: 00007ffd234687f8 CR3: 0000000005316005 CR4: 0000000000772ef0
[    3.808703] PKRU: 55555554
[    3.808737] Call Trace:
[    3.808769]  <TASK>
[    3.808804]  netdev_run_todo+0x21a/0x550
[    3.808869]  ops_undo_list+0x1e3/0x1f0
[    3.808924]  cleanup_net+0x1b7/0x2b0
[    3.808974]  process_one_work+0x162/0x380
[    3.809025]  worker_thread+0x299/0x3c0
[    3.809074]  ? rescuer_thread+0x4c0/0x4c0
[    3.809126]  kthread+0x101/0x1f0
[    3.809176]  ? kthreads_online_cpu+0x110/0x110
[    3.809240]  ? kthreads_online_cpu+0x110/0x110
[    3.809301]  ret_from_fork+0x11c/0x140
[    3.809355]  ? kthreads_online_cpu+0x110/0x110
[    3.809413]  ret_from_fork_asm+0x11/0x20
[    3.809466]  </TASK>
[    3.809498] ---[ end trace 0000000000000000 ]---