[ 2.752854] ------------[ cut here ]------------ [ 2.752944] refcount_t: underflow; use-after-free. [ 2.753063] WARNING: CPU: 3 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 2.753129] Modules linked in: sch_fq [ 2.753165] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 2.753229] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.753278] Workqueue: netns cleanup_net [ 2.753317] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 2.753357] Code: 90 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 95 90 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 [ 2.753480] RSP: 0018:ffffb624c0067d50 EFLAGS: 00010286 [ 2.753516] RAX: 0000000000000000 RBX: ffffb624c0067d60 RCX: 00000000ffffdfff [ 2.753573] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 2.753637] RBP: ffffb624c0067858 R08: ffffffff9115ba28 R09: 00000000ffffdfff [ 2.753695] R10: ffffffff9107ba40 R11: ffffffff9112ba40 R12: dead000000000122 [ 2.753753] R13: 00000000fffb7661 R14: 0000000000000001 R15: ffff8a08c4b6a000 [ 2.753824] FS: 0000000000000000(0000) GS:ffff8a096d511000(0000) knlGS:0000000000000000 [ 2.753885] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.753942] CR2: 00005591f9a19ed8 CR3: 0000000024e46002 CR4: 0000000000772ef0 [ 2.754028] PKRU: 55555554 [ 2.754056] Call Trace: [ 2.754093] [ 2.754124] netdev_run_todo+0x21a/0x550 [ 2.754161] ops_undo_list+0x1e3/0x1f0 [ 2.754192] cleanup_net+0x1b7/0x300 [ 2.754225] process_one_work+0x162/0x380 [ 2.754262] worker_thread+0x299/0x3c0 [ 2.754294] ? rescuer_thread+0x4c0/0x4c0 [ 2.754325] kthread+0x101/0x1f0 [ 2.754357] ? kthreads_online_cpu+0x110/0x110 [ 2.754399] ? kthreads_online_cpu+0x110/0x110 [ 2.754439] ret_from_fork+0x11c/0x140 [ 2.754471] ? kthreads_online_cpu+0x110/0x110 [ 2.754509] ret_from_fork_asm+0x11/0x20 [ 2.754545] [ 2.754567] ---[ end trace 0000000000000000 ]---