[    2.080245] ip (254) used greatest stack depth: 12136 bytes left
[    2.963049] ------------[ cut here ]------------
[    2.963141] refcount_t: underflow; use-after-free.
[    2.963210] WARNING: CPU: 3 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    2.963302] Modules linked in: sch_fq
[    2.963343] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    2.963447] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.963513] Workqueue: netns cleanup_net
[    2.963561] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    2.963614] Code: 84 e8 e8 54 ba ff 90 0f 0b 90 90 c3 80 3d 00 e6 2b 01 00 75 89 c6 05 f7 e5 2b 01 01 90 48 c7 c7 f8 48 d5 84 e8 c5 54 ba ff 90 <0f> 0b 90 90 c3 80 3d db e5 2b 01 00 0f 85 62 ff ff ff c6 05 ce e5
[    2.963798] RSP: 0018:ffff9a7d0024fd50 EFLAGS: 00010286
[    2.963860] RAX: 0000000000000000 RBX: ffff9a7d0024fd60 RCX: 00000000ffffdfff
[    2.963938] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    2.964025] RBP: ffff9a7d0024f858 R08: ffffffff8555ba28 R09: 00000000ffffdfff
[    2.964104] R10: ffffffff8547ba40 R11: ffffffff8552ba40 R12: dead000000000122
[    2.964184] R13: 00000000fffb772c R14: 0000000000000001 R15: ffff8d2fc5dc2000
[    2.964265] FS:  0000000000000000(0000) GS:ffff8d3079111000(0000) knlGS:0000000000000000
[    2.964353] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.964417] CR2: 00007fb7df4be4d8 CR3: 0000000012e46001 CR4: 0000000000772ef0
[    2.964498] PKRU: 55555554
[    2.964523] Call Trace:
[    2.964551]  <TASK>
[    2.964576]  netdev_run_todo+0x21a/0x550
[    2.964617]  ops_undo_list+0x1e3/0x1f0
[    2.964655]  cleanup_net+0x1b7/0x300
[    2.964696]  process_one_work+0x162/0x380
[    2.964746]  worker_thread+0x299/0x3c0
[    2.964785]  ? rescuer_thread+0x4c0/0x4c0
[    2.964826]  kthread+0x101/0x1f0
[    2.964867]  ? kthreads_online_cpu+0x110/0x110
[    2.964922]  ? kthreads_online_cpu+0x110/0x110
[    2.964978]  ret_from_fork+0x11c/0x140
[    2.965025]  ? kthreads_online_cpu+0x110/0x110
[    2.965080]  ret_from_fork_asm+0x11/0x20
[    2.965121]  </TASK>
[    2.965147] ---[ end trace 0000000000000000 ]---