[    2.054776] ip (248) used greatest stack depth: 12216 bytes left
[    2.405044] ip (271) used greatest stack depth: 12168 bytes left
[    3.150939] ------------[ cut here ]------------
[    3.151013] refcount_t: underflow; use-after-free.
[    3.151080] WARNING: CPU: 0 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.151148] Modules linked in:
[    3.151186] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.151251] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.151298] Workqueue: netns cleanup_net
[    3.151334] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.151382] Code: b9 e8 48 df ba ff 90 0f 0b 90 90 c3 80 3d c9 50 ec 00 00 75 89 c6 05 c0 50 ec 00 01 90 48 c7 c7 c8 4a 12 b9 e8 25 df ba ff 90 <0f> 0b 90 90 c3 80 3d a4 50 ec 00 00 0f 85 62 ff ff ff c6 05 97 50
[    3.151495] RSP: 0018:ffffb0c88025fd50 EFLAGS: 00010286
[    3.151544] RAX: 0000000000000000 RBX: ffffb0c88025fd60 RCX: 00000000ffffdfff
[    3.151617] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.151708] RBP: ffffb0c88025f878 R08: ffffffffb955ca28 R09: 00000000ffffdfff
[    3.151780] R10: ffffffffb947ca40 R11: ffffffffb952ca40 R12: dead000000000122
[    3.151849] R13: 00000000fffb77ec R14: 0000000000000001 R15: ffff8bbf86505000
[    3.151933] FS:  0000000000000000(0000) GS:ffff8bc004fc0000(0000) knlGS:0000000000000000
[    3.152018] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.152070] CR2: 00007efd8cd12000 CR3: 000000002ba47001 CR4: 0000000000772ef0
[    3.152145] PKRU: 55555554
[    3.152168] Call Trace:
[    3.152199]  <TASK>
[    3.152235]  netdev_run_todo+0x21a/0x550
[    3.152286]  ops_undo_list+0x1e3/0x1f0
[    3.152328]  cleanup_net+0x1b7/0x2b0
[    3.152371]  process_one_work+0x162/0x380
[    3.152419]  worker_thread+0x299/0x3c0
[    3.152459]  ? rescuer_thread+0x4c0/0x4c0
[    3.152502]  kthread+0x101/0x1f0
[    3.152543]  ? kthreads_online_cpu+0x110/0x110
[    3.152600]  ? kthreads_online_cpu+0x110/0x110
[    3.152651]  ret_from_fork+0x11c/0x140
[    3.152691]  ? kthreads_online_cpu+0x110/0x110
[    3.152729]  ret_from_fork_asm+0x11/0x20
[    3.152769]  </TASK>
[    3.152800] ---[ end trace 0000000000000000 ]---
[    5.221065] netem: version 1.3