[    2.941104] u32 classifier
[    2.941166]     input device check on
[    2.941230]     Actions configured
[    2.973852] netem: version 1.3
[    3.157899] sctp: Hash tables configured (bind 256/256)
[    3.494983] htb: netem qdisc 10: is non-work-conserving?
[    5.285249] ------------[ cut here ]------------
[    5.285341] refcount_t: underflow; use-after-free.
[    5.285407] WARNING: CPU: 0 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    5.285495] 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
[    5.285627] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    5.285695] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    5.285743] Workqueue: netns cleanup_net
[    5.285778] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    5.285820] Code: 99 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 31 99 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
[    5.285984] RSP: 0018:ffffbb250025fd50 EFLAGS: 00010286
[    5.286029] RAX: 0000000000000000 RBX: ffffbb250025fd60 RCX: 00000000ffffdfff
[    5.286118] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    5.286182] RBP: ffffbb250025f868 R08: ffffffff99756d28 R09: 00000000ffffdfff
[    5.286247] R10: ffffffff99676d40 R11: ffffffff99726d40 R12: dead000000000122
[    5.286328] R13: 00000000fffb802e R14: 0000000000000001 R15: ffff96f682ff5000
[    5.286391] FS:  0000000000000000(0000) GS:ffff96f724dd8000(0000) knlGS:0000000000000000
[    5.286453] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    5.286506] CR2: 000055d8650cddec CR3: 0000000008b9a002 CR4: 0000000000772ef0
[    5.286567] PKRU: 55555554
[    5.286590] Call Trace:
[    5.286610]  <TASK>
[    5.286635]  netdev_run_todo+0x21a/0x550
[    5.286688]  ops_undo_list+0x1e3/0x1f0
[    5.286728]  cleanup_net+0x1b7/0x2b0
[    5.286761]  process_one_work+0x162/0x380
[    5.286802]  worker_thread+0x299/0x3c0
[    5.286834]  ? rescuer_thread+0x4c0/0x4c0
[    5.286867]  kthread+0x101/0x1f0
[    5.286910]  ? kthreads_online_cpu+0x110/0x110
[    5.286961]  ? kthreads_online_cpu+0x110/0x110
[    5.287017]  ret_from_fork+0x11c/0x140
[    5.287057]  ? kthreads_online_cpu+0x110/0x110
[    5.287101]  ret_from_fork_asm+0x11/0x20
[    5.287141]  </TASK>
[    5.287165] ---[ end trace 0000000000000000 ]---