[    2.616442] u32 classifier
[    2.616495]     input device check on
[    2.616530]     Actions configured
[    2.644102] netem: version 1.3
[    2.808310] sctp: Hash tables configured (bind 256/256)
[    3.144874] htb: netem qdisc 10: is non-work-conserving?
[    4.932235] ------------[ cut here ]------------
[    4.932325] refcount_t: underflow; use-after-free.
[    4.932409] WARNING: CPU: 0 PID: 67 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    4.932519] Modules linked in: sctp ip6_udp_tunnel udp_tunnel xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables x_tables sch_netem cls_u32 sch_htb veth
[    4.932684] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    4.932761] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    4.932822] Workqueue: netns cleanup_net
[    4.932862] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    4.932911] Code: 8a e8 18 ed b9 ff 90 0f 0b 90 90 c3 80 3d d9 ea ea 00 00 75 89 c6 05 d0 ea ea 00 01 90 48 c7 c7 78 de f1 8a e8 f5 ec b9 ff 90 <0f> 0b 90 90 c3 80 3d b4 ea ea 00 00 0f 85 62 ff ff ff c6 05 a7 ea
[    4.933071] RSP: 0000:ffffa4a300257d50 EFLAGS: 00010286
[    4.933119] RAX: 0000000000000000 RBX: ffffa4a300257d60 RCX: 00000000ffffdfff
[    4.933194] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    4.933257] RBP: ffffa4a300257868 R08: ffffffff8b356d28 R09: 00000000ffffdfff
[    4.933315] R10: ffffffff8b276d40 R11: ffffffff8b326d40 R12: dead000000000122
[    4.933377] R13: 00000000fffb7ee4 R14: 0000000000000001 R15: ffff911dc1f67000
[    4.933437] FS:  0000000000000000(0000) GS:ffff911e731d8000(0000) knlGS:0000000000000000
[    4.933516] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.933580] CR2: 00007f35e93c6ae4 CR3: 0000000006618006 CR4: 0000000000772ef0
[    4.933644] PKRU: 55555554
[    4.933670] Call Trace:
[    4.933689]  <TASK>
[    4.933709]  netdev_run_todo+0x21a/0x550
[    4.933754]  ops_undo_list+0x1e3/0x1f0
[    4.933794]  cleanup_net+0x1b7/0x2b0
[    4.933835]  process_one_work+0x162/0x380
[    4.933876]  worker_thread+0x299/0x3c0
[    4.933911]  ? rescuer_thread+0x4c0/0x4c0
[    4.933949]  kthread+0x101/0x1f0
[    4.933998]  ? kthreads_online_cpu+0x110/0x110
[    4.934043]  ? kthreads_online_cpu+0x110/0x110
[    4.934100]  ret_from_fork+0x11c/0x140
[    4.934139]  ? kthreads_online_cpu+0x110/0x110
[    4.934190]  ret_from_fork_asm+0x11/0x20
[    4.934235]  </TASK>
[    4.934258] ---[ end trace 0000000000000000 ]---