[    2.211339] ip (249) used greatest stack depth: 12152 bytes left
[    2.880044] netem: version 1.3
[  104.098794] ------------[ cut here ]------------
[  104.099032] refcount_t: underflow; use-after-free.
[  104.099121] WARNING: CPU: 2 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[  104.099236] Modules linked in: sch_netem
[  104.099310] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[  104.099422] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  104.099524] Workqueue: netns cleanup_net
[  104.099591] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[  104.099666] Code: ac 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 92 ac 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
[  104.099877] RSP: 0018:ffffb5824024fd50 EFLAGS: 00010286
[  104.099952] RAX: 0000000000000000 RBX: ffffb5824024fd60 RCX: 00000000ffffdfff
[  104.100053] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[  104.100150] RBP: ffffb5824024f878 R08: ffffffffacd5ca28 R09: 00000000ffffdfff
[  104.100255] R10: ffffffffacc7ca40 R11: ffffffffacd2ca40 R12: dead000000000122
[  104.100355] R13: 00000000fffd0241 R14: 0000000000000001 R15: ffff8a610112c000
[  104.100456] FS:  0000000000000000(0000) GS:ffff8a61918c0000(0000) knlGS:0000000000000000
[  104.100558] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  104.100644] CR2: 00000000004061e9 CR3: 0000000001b24002 CR4: 0000000000772ef0
[  104.100751] PKRU: 55555554
[  104.100801] Call Trace:
[  104.100856]  <TASK>
[  104.100912]  netdev_run_todo+0x21a/0x550
[  104.100984]  ops_undo_list+0x1e3/0x1f0
[  104.101050]  cleanup_net+0x1b7/0x2b0
[  104.101111]  process_one_work+0x162/0x380
[  104.101181]  worker_thread+0x299/0x3c0
[  104.101252]  ? rescuer_thread+0x4c0/0x4c0
[  104.101317]  kthread+0x101/0x1f0
[  104.101385]  ? kthreads_online_cpu+0x110/0x110
[  104.101459]  ? kthreads_online_cpu+0x110/0x110
[  104.101532]  ret_from_fork+0x11c/0x140
[  104.101598]  ? kthreads_online_cpu+0x110/0x110
[  104.101654]  ret_from_fork_asm+0x11/0x20
[  104.101721]  </TASK>
[  104.101767] ---[ end trace 0000000000000000 ]---