[    2.242831] ip (252) used greatest stack depth: 12152 bytes left
[    3.381955] ------------[ cut here ]------------
[    3.382030] refcount_t: underflow; use-after-free.
[    3.382089] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.382160] Modules linked in:
[    3.382201] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.382267] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.382307] Workqueue: netns cleanup_net
[    3.382339] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.382378] Code: 9d 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 32 9d 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
[    3.382500] RSP: 0018:ffffbcd740067d50 EFLAGS: 00010286
[    3.382538] RAX: 0000000000000000 RBX: ffffbcd740067d60 RCX: 00000000ffffdfff
[    3.382595] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.382642] RBP: ffffbcd740067878 R08: ffffffff9d75ca28 R09: 00000000ffffdfff
[    3.382692] R10: ffffffff9d67ca40 R11: ffffffff9d72ca40 R12: dead000000000122
[    3.382748] R13: 00000000fffb78d5 R14: 0000000000000001 R15: ffff9d4e062fc000
[    3.382811] FS:  0000000000000000(0000) GS:ffff9d4ea0dc0000(0000) knlGS:0000000000000000
[    3.382875] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.382934] CR2: 00007f3e2a321520 CR3: 0000000006a22002 CR4: 0000000000772ef0
[    3.382983] PKRU: 55555554
[    3.383006] Call Trace:
[    3.383025]  <TASK>
[    3.383047]  netdev_run_todo+0x21a/0x550
[    3.383081]  ops_undo_list+0x1e3/0x1f0
[    3.383111]  cleanup_net+0x1b7/0x2b0
[    3.383153]  process_one_work+0x162/0x380
[    3.383193]  worker_thread+0x299/0x3c0
[    3.383226]  ? rescuer_thread+0x4c0/0x4c0
[    3.383257]  kthread+0x101/0x1f0
[    3.383289]  ? kthreads_online_cpu+0x110/0x110
[    3.383328]  ? kthreads_online_cpu+0x110/0x110
[    3.383368]  ret_from_fork+0x11c/0x140
[    3.383399]  ? kthreads_online_cpu+0x110/0x110
[    3.383438]  ret_from_fork_asm+0x11/0x20
[    3.383470]  </TASK>
[    3.383490] ---[ end trace 0000000000000000 ]---
[    5.428274] netem: version 1.3