[ 1.864557] ------------[ cut here ]------------ [ 1.864678] refcount_t: underflow; use-after-free. [ 1.864752] WARNING: CPU: 2 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 1.864844] Modules linked in: [ 1.864902] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 1.864995] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1.865062] Workqueue: netns cleanup_net [ 1.865119] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 1.865201] Code: 9c 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 f5 9c 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 [ 1.865363] RSP: 0018:ffffac6f0024fd50 EFLAGS: 00010286 [ 1.865423] RAX: 0000000000000000 RBX: ffffac6f0024fd60 RCX: 00000000ffffdfff [ 1.865501] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 1.865588] RBP: ffffac6f0024f858 R08: ffffffff9d75ba28 R09: 00000000ffffdfff [ 1.865666] R10: ffffffff9d67ba40 R11: ffffffff9d72ba40 R12: dead000000000122 [ 1.865741] R13: 00000000fffb72ea R14: 0000000000000001 R15: ffffa0e785c25000 [ 1.865819] FS: 0000000000000000(0000) GS:ffffa0e820e91000(0000) knlGS:0000000000000000 [ 1.865917] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.866004] CR2: 00007fc7eff9f000 CR3: 0000000029a46003 CR4: 0000000000772ef0 [ 1.866102] PKRU: 55555554 [ 1.866145] Call Trace: [ 1.866191] [ 1.866253] netdev_run_todo+0x21a/0x550 [ 1.866303] ops_undo_list+0x1e3/0x1f0 [ 1.866358] cleanup_net+0x1b7/0x300 [ 1.866412] process_one_work+0x162/0x380 [ 1.866470] worker_thread+0x299/0x3c0 [ 1.866525] ? rescuer_thread+0x4c0/0x4c0 [ 1.866592] kthread+0x101/0x1f0 [ 1.866650] ? kthreads_online_cpu+0x110/0x110 [ 1.866712] ? kthreads_online_cpu+0x110/0x110 [ 1.866775] ret_from_fork+0x11c/0x140 [ 1.866834] ? kthreads_online_cpu+0x110/0x110 [ 1.866915] ret_from_fork_asm+0x11/0x20 [ 1.866987] [ 1.867043] ---[ end trace 0000000000000000 ]---