[    2.197586] ip (251) used greatest stack depth: 12152 bytes left
[    3.164060] ------------[ cut here ]------------
[    3.164137] refcount_t: underflow; use-after-free.
[    3.164203] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.164269] Modules linked in:
[    3.164305] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.164384] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.164433] Workqueue: netns cleanup_net
[    3.164479] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.164520] Code: b0 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 52 b0 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
[    3.164664] RSP: 0018:ffffa76040067d50 EFLAGS: 00010286
[    3.164717] RAX: 0000000000000000 RBX: ffffa76040067d60 RCX: 00000000ffffdfff
[    3.164779] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.164836] RBP: ffffa76040067878 R08: ffffffffb095ca28 R09: 00000000ffffdfff
[    3.164895] R10: ffffffffb087ca40 R11: ffffffffb092ca40 R12: dead000000000122
[    3.164954] R13: 00000000fffb77f2 R14: 0000000000000001 R15: ffff9900059e4000
[    3.165033] FS:  0000000000000000(0000) GS:ffff99008dbc0000(0000) knlGS:0000000000000000
[    3.165116] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.165164] CR2: 00007f7956152000 CR3: 0000000033e47004 CR4: 0000000000772ef0
[    3.165220] PKRU: 55555554
[    3.165241] Call Trace:
[    3.165260]  <TASK>
[    3.165281]  netdev_run_todo+0x21a/0x550
[    3.165345]  ops_undo_list+0x1e3/0x1f0
[    3.165387]  cleanup_net+0x1b7/0x2b0
[    3.165418]  process_one_work+0x162/0x380
[    3.165466]  worker_thread+0x299/0x3c0
[    3.165495]  ? rescuer_thread+0x4c0/0x4c0
[    3.165528]  kthread+0x101/0x1f0
[    3.165568]  ? kthreads_online_cpu+0x110/0x110
[    3.165608]  ? kthreads_online_cpu+0x110/0x110
[    3.165662]  ret_from_fork+0x11c/0x140
[    3.165703]  ? kthreads_online_cpu+0x110/0x110
[    3.165758]  ret_from_fork_asm+0x11/0x20
[    3.165799]  </TASK>
[    3.165824] ---[ end trace 0000000000000000 ]---
[    6.376445] netem: version 1.3