[    2.369968] ip (263) used greatest stack depth: 12376 bytes left
[    2.496672] ip (271) used greatest stack depth: 12344 bytes left
[    2.600358] ip (285) used greatest stack depth: 12136 bytes left
[    5.810373] ip (562) used greatest stack depth: 11960 bytes left
[   39.904517] ------------[ cut here ]------------
[   39.904628] refcount_t: underflow; use-after-free.
[   39.904702] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[   39.904803] Modules linked in: tcp_diag inet_diag nft_masq nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables veth
[   39.904966] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[   39.905068] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   39.905140] Workqueue: netns cleanup_net
[   39.905193] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[   39.905258] Code: ae 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 51 ae 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
[   39.905470] RSP: 0018:ffffacc000067d50 EFLAGS: 00010286
[   39.905536] RAX: 0000000000000000 RBX: ffffacc000067d60 RCX: 00000000ffffdfff
[   39.905622] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[   39.905706] RBP: ffffacc000067868 R08: ffffffffae956d28 R09: 00000000ffffdfff
[   39.905794] R10: ffffffffae876d40 R11: ffffffffae926d40 R12: dead000000000122
[   39.905880] R13: 00000000fffc077a R14: 0000000000000001 R15: ffff9f6604361000
[   39.905967] FS:  0000000000000000(0000) GS:ffff9f6690bd8000(0000) knlGS:0000000000000000
[   39.906058] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   39.906132] CR2: 000055f96d699dec CR3: 000000000aae3001 CR4: 0000000000772ef0
[   39.906219] PKRU: 55555554
[   39.906253] Call Trace:
[   39.906285]  <TASK>
[   39.906315]  netdev_run_todo+0x21a/0x550
[   39.906374]  ops_undo_list+0x1e3/0x1f0
[   39.906431]  cleanup_net+0x1b7/0x2b0
[   39.906486]  process_one_work+0x162/0x380
[   39.906543]  worker_thread+0x299/0x3c0
[   39.906592]  ? rescuer_thread+0x4c0/0x4c0
[   39.906636]  kthread+0x101/0x1f0
[   39.906683]  ? kthreads_online_cpu+0x110/0x110
[   39.906745]  ? kthreads_online_cpu+0x110/0x110
[   39.906811]  ret_from_fork+0x11c/0x140
[   39.906868]  ? kthreads_online_cpu+0x110/0x110
[   39.906933]  ret_from_fork_asm+0x11/0x20
[   39.906988]  </TASK>
[   39.907015] ---[ end trace 0000000000000000 ]---