[ 1.873043] ------------[ cut here ]------------ [ 1.873102] refcount_t: underflow; use-after-free. [ 1.873146] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 1.873211] Modules linked in: [ 1.873238] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 1.873305] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1.873353] Workqueue: netns cleanup_net [ 1.873386] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 1.873428] Code: 9b 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 9b 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 [ 1.873543] RSP: 0018:ffffad5a40067d50 EFLAGS: 00010286 [ 1.873591] RAX: 0000000000000000 RBX: ffffad5a40067d60 RCX: 00000000ffffdfff [ 1.873645] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 1.873693] RBP: ffffad5a40067858 R08: ffffffff9c55ba28 R09: 00000000ffffdfff [ 1.873742] R10: ffffffff9c47ba40 R11: ffffffff9c52ba40 R12: dead000000000122 [ 1.873792] R13: 00000000fffb72f4 R14: 0000000000000001 R15: ffff9bdfc7032000 [ 1.873847] FS: 0000000000000000(0000) GS:ffff9be061f91000(0000) knlGS:0000000000000000 [ 1.873903] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.873950] CR2: 00007f6e87015000 CR3: 000000002f846002 CR4: 0000000000772ef0 [ 1.874014] PKRU: 55555554 [ 1.874037] Call Trace: [ 1.874054] [ 1.874078] netdev_run_todo+0x21a/0x550 [ 1.874110] ops_undo_list+0x1e3/0x1f0 [ 1.874140] cleanup_net+0x1b7/0x300 [ 1.874176] process_one_work+0x162/0x380 [ 1.874210] worker_thread+0x299/0x3c0 [ 1.874240] ? rescuer_thread+0x4c0/0x4c0 [ 1.874270] kthread+0x101/0x1f0 [ 1.874311] ? kthreads_online_cpu+0x110/0x110 [ 1.874345] ? kthreads_online_cpu+0x110/0x110 [ 1.874383] ret_from_fork+0x11c/0x140 [ 1.874413] ? kthreads_online_cpu+0x110/0x110 [ 1.874453] ret_from_fork_asm+0x11/0x20 [ 1.874487] [ 1.874519] ---[ end trace 0000000000000000 ]---