[    2.102601] ip (256) used greatest stack depth: 12136 bytes left
[    2.312243] GACT probability NOT on
[    2.313318] tc (272) used greatest stack depth: 11840 bytes left
[    6.622756] ------------[ cut here ]------------
[    6.622868] refcount_t: underflow; use-after-free.
[    6.622952] WARNING: CPU: 2 PID: 67 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    6.623030] Modules linked in: act_gact cls_flower sch_ingress
[    6.623101] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    6.623181] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    6.623260] Workqueue: netns cleanup_net
[    6.623313] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    6.623370] Code: af 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 55 af 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
[    6.623501] RSP: 0018:ffffb12840257d50 EFLAGS: 00010286
[    6.623556] RAX: 0000000000000000 RBX: ffffb12840257d60 RCX: 00000000ffffdfff
[    6.623626] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    6.623696] RBP: ffffb12840257858 R08: ffffffffafd5ba28 R09: 00000000ffffdfff
[    6.623777] R10: ffffffffafc7ba40 R11: ffffffffafd2ba40 R12: dead000000000122
[    6.623847] R13: 00000000fffb857c R14: 0000000000000001 R15: ffff993085797000
[    6.623925] FS:  0000000000000000(0000) GS:ffff99310f891000(0000) knlGS:0000000000000000
[    6.623998] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    6.624082] CR2: 000055b98a321dec CR3: 000000000547c005 CR4: 0000000000772ef0
[    6.624153] PKRU: 55555554
[    6.624192] Call Trace:
[    6.624238]  <TASK>
[    6.624277]  netdev_run_todo+0x21a/0x550
[    6.624338]  ops_undo_list+0x1e3/0x1f0
[    6.624392]  cleanup_net+0x1b7/0x300
[    6.624441]  process_one_work+0x162/0x380
[    6.624493]  worker_thread+0x299/0x3c0
[    6.624542]  ? rescuer_thread+0x4c0/0x4c0
[    6.624590]  kthread+0x101/0x1f0
[    6.624639]  ? kthreads_online_cpu+0x110/0x110
[    6.624694]  ? kthreads_online_cpu+0x110/0x110
[    6.624755]  ret_from_fork+0x11c/0x140
[    6.624805]  ? kthreads_online_cpu+0x110/0x110
[    6.624860]  ret_from_fork_asm+0x11/0x20
[    6.624915]  </TASK>
[    6.624955] ---[ end trace 0000000000000000 ]---