[    2.062601] ip (244) used greatest stack depth: 12152 bytes left
[    3.075855] ------------[ cut here ]------------
[    3.075913] refcount_t: underflow; use-after-free.
[    3.075980] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.076105] Modules linked in:
[    3.076146] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.076244] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.076310] Workqueue: netns cleanup_net
[    3.076358] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.076409] Code: a4 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 72 a4 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
[    3.076601] RSP: 0018:ffff9d7840067d50 EFLAGS: 00010286
[    3.076654] RAX: 0000000000000000 RBX: ffff9d7840067d60 RCX: 00000000ffffdfff
[    3.076731] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.076811] RBP: ffff9d7840067878 R08: ffffffffa4b5ca28 R09: 00000000ffffdfff
[    3.076894] R10: ffffffffa4a7ca40 R11: ffffffffa4b2ca40 R12: dead000000000122
[    3.076970] R13: 00000000fffb77a2 R14: 0000000000000001 R15: ffff923bc68c4000
[    3.077051] FS:  0000000000000000(0000) GS:ffff923c599c0000(0000) knlGS:0000000000000000
[    3.077138] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.077204] CR2: 00007f0b2b505000 CR3: 000000002ce47004 CR4: 0000000000772ef0
[    3.077286] PKRU: 55555554
[    3.077311] Call Trace:
[    3.077339]  <TASK>
[    3.077364]  netdev_run_todo+0x21a/0x550
[    3.077414]  ops_undo_list+0x1e3/0x1f0
[    3.077459]  cleanup_net+0x1b7/0x2b0
[    3.077499]  process_one_work+0x162/0x380
[    3.077544]  worker_thread+0x299/0x3c0
[    3.077586]  ? rescuer_thread+0x4c0/0x4c0
[    3.077626]  kthread+0x101/0x1f0
[    3.077665]  ? kthreads_online_cpu+0x110/0x110
[    3.077717]  ? kthreads_online_cpu+0x110/0x110
[    3.077772]  ret_from_fork+0x11c/0x140
[    3.077815]  ? kthreads_online_cpu+0x110/0x110
[    3.077868]  ret_from_fork_asm+0x11/0x20
[    3.077909]  </TASK>
[    3.077934] ---[ end trace 0000000000000000 ]---
[    5.067065] netem: version 1.3