[    2.078357] ip (245) used greatest stack depth: 12152 bytes left
[    3.195082] ------------[ cut here ]------------
[    3.195151] refcount_t: underflow; use-after-free.
[    3.195215] WARNING: CPU: 3 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.195279] Modules linked in:
[    3.195316] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.195417] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.195474] Workqueue: netns cleanup_net
[    3.195512] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.195563] Code: 85 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 85 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
[    3.195686] RSP: 0018:ffffb523c024fd50 EFLAGS: 00010286
[    3.195726] RAX: 0000000000000000 RBX: ffffb523c024fd60 RCX: 00000000ffffdfff
[    3.195809] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.195866] RBP: ffffb523c024f878 R08: ffffffff8575ca28 R09: 00000000ffffdfff
[    3.195916] R10: ffffffff8567ca40 R11: ffffffff8572ca40 R12: dead000000000122
[    3.195964] R13: 00000000fffb780a R14: 0000000000000001 R15: ffff9f95868df000
[    3.196015] FS:  0000000000000000(0000) GS:ffff9f9638f40000(0000) knlGS:0000000000000000
[    3.196075] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.196129] CR2: 00007ffe42b0ebd8 CR3: 0000000003f39004 CR4: 0000000000772ef0
[    3.196212] PKRU: 55555554
[    3.196244] Call Trace:
[    3.196269]  <TASK>
[    3.196290]  netdev_run_todo+0x21a/0x550
[    3.196336]  ops_undo_list+0x1e3/0x1f0
[    3.196375]  cleanup_net+0x1b7/0x2b0
[    3.196420]  process_one_work+0x162/0x380
[    3.196472]  worker_thread+0x299/0x3c0
[    3.196519]  ? rescuer_thread+0x4c0/0x4c0
[    3.196563]  kthread+0x101/0x1f0
[    3.196598]  ? kthreads_online_cpu+0x110/0x110
[    3.196636]  ? kthreads_online_cpu+0x110/0x110
[    3.196700]  ret_from_fork+0x11c/0x140
[    3.196769]  ? kthreads_online_cpu+0x110/0x110
[    3.196820]  ret_from_fork_asm+0x11/0x20
[    3.196866]  </TASK>
[    3.196889] ---[ end trace 0000000000000000 ]---
[    6.365682] netem: version 1.3