[ 4.291913] ------------[ cut here ]------------ [ 4.292003] refcount_t: underflow; use-after-free. [ 4.292067] WARNING: CPU: 0 PID: 67 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 4.292162] Modules linked in: sch_etf sch_fq [ 4.292223] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 4.292321] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 4.292387] Workqueue: netns cleanup_net [ 4.292432] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 4.292484] Code: 97 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 97 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 [ 4.292667] RSP: 0000:ffffbae640257d50 EFLAGS: 00010286 [ 4.292718] RAX: 0000000000000000 RBX: ffffbae640257d60 RCX: 00000000ffffdfff [ 4.292795] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 4.292874] RBP: ffffbae640257858 R08: ffffffff9855ba28 R09: 00000000ffffdfff [ 4.292955] R10: ffffffff9847ba40 R11: ffffffff9852ba40 R12: dead000000000122 [ 4.293037] R13: 00000000fffb7c67 R14: 0000000000000001 R15: ffff94014693f000 [ 4.293116] FS: 0000000000000000(0000) GS:ffff9401e5f91000(0000) knlGS:0000000000000000 [ 4.293193] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4.293256] CR2: 00007fc2df54412f CR3: 000000000401d006 CR4: 0000000000772ef0 [ 4.293335] PKRU: 55555554 [ 4.293360] Call Trace: [ 4.293388] [ 4.293412] netdev_run_todo+0x21a/0x550 [ 4.293454] ops_undo_list+0x1e3/0x1f0 [ 4.293501] cleanup_net+0x1b7/0x300 [ 4.293548] process_one_work+0x162/0x380 [ 4.293594] worker_thread+0x299/0x3c0 [ 4.293633] ? rescuer_thread+0x4c0/0x4c0 [ 4.293671] kthread+0x101/0x1f0 [ 4.293711] ? kthreads_online_cpu+0x110/0x110 [ 4.293762] ? kthreads_online_cpu+0x110/0x110 [ 4.293814] ret_from_fork+0x11c/0x140 [ 4.293854] ? kthreads_online_cpu+0x110/0x110 [ 4.293908] ret_from_fork_asm+0x11/0x20 [ 4.293954] [ 4.293978] ---[ end trace 0000000000000000 ]---