[    2.551577] ip (259) used greatest stack depth: 12296 bytes left
[    3.531491] ------------[ cut here ]------------
[    3.531570] refcount_t: underflow; use-after-free.
[    3.531641] WARNING: CPU: 0 PID: 67 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.531737] Modules linked in: nft_masq nft_chain_nat nf_nat nf_conntrack_netlink nft_ct nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables tcp_diag inet_diag veth
[    3.531906] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.532005] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.532074] Workqueue: netns cleanup_net
[    3.532122] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.532184] Code: 9f 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 91 9f 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
[    3.532387] RSP: 0018:ffffa3e0c0257d50 EFLAGS: 00010286
[    3.532446] RAX: 0000000000000000 RBX: ffffa3e0c0257d60 RCX: 00000000ffffdfff
[    3.532533] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.532621] RBP: ffffa3e0c0257868 R08: ffffffff9fd56d28 R09: 00000000ffffdfff
[    3.532698] R10: ffffffff9fc76d40 R11: ffffffff9fd26d40 R12: dead000000000122
[    3.532777] R13: 00000000fffb7968 R14: 0000000000000001 R15: ffff938742cf6000
[    3.532859] FS:  0000000000000000(0000) GS:ffff9387de7d8000(0000) knlGS:0000000000000000
[    3.532945] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.533017] CR2: 0000560cc5a80dec CR3: 00000000078ad006 CR4: 0000000000772ef0
[    3.533099] PKRU: 55555554
[    3.533131] Call Trace:
[    3.533161]  <TASK>
[    3.533194]  netdev_run_todo+0x21a/0x550
[    3.533244]  ops_undo_list+0x1e3/0x1f0
[    3.533294]  cleanup_net+0x1b7/0x2b0
[    3.533342]  process_one_work+0x162/0x380
[    3.533388]  worker_thread+0x299/0x3c0
[    3.533428]  ? rescuer_thread+0x4c0/0x4c0
[    3.533472]  kthread+0x101/0x1f0
[    3.533518]  ? kthreads_online_cpu+0x110/0x110
[    3.533577]  ? kthreads_online_cpu+0x110/0x110
[    3.533631]  ret_from_fork+0x11c/0x140
[    3.533681]  ? kthreads_online_cpu+0x110/0x110
[    3.533732]  ret_from_fork_asm+0x11/0x20
[    3.533781]  </TASK>
[    3.533805] ---[ end trace 0000000000000000 ]---