[ 6.160223] ------------[ cut here ]------------ [ 6.160305] refcount_t: underflow; use-after-free. [ 6.160352] WARNING: CPU: 3 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 6.160419] Modules linked in: [ 6.160448] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 6.160527] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 6.160574] Workqueue: netns cleanup_net [ 6.160611] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 6.160661] Code: b6 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 b6 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 [ 6.160799] RSP: 0018:ffffb44840067d50 EFLAGS: 00010286 [ 6.160837] RAX: 0000000000000000 RBX: ffffb44840067d60 RCX: 00000000ffffdfff [ 6.160900] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 6.160949] RBP: ffffb44840067858 R08: ffffffffb775ba28 R09: 00000000ffffdfff [ 6.161015] R10: ffffffffb767ba40 R11: ffffffffb772ba40 R12: dead000000000122 [ 6.161071] R13: 00000000fffb83b2 R14: 0000000000000001 R15: ffff97ad84b0d000 [ 6.161120] FS: 0000000000000000(0000) GS:ffff97ae06f11000(0000) knlGS:0000000000000000 [ 6.161172] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6.161237] CR2: 00007f5c813f0bd0 CR3: 0000000004827002 CR4: 0000000000772ef0 [ 6.161294] PKRU: 55555554 [ 6.161315] Call Trace: [ 6.161333] [ 6.161356] netdev_run_todo+0x21a/0x550 [ 6.161393] ops_undo_list+0x1e3/0x1f0 [ 6.161425] cleanup_net+0x1b7/0x300 [ 6.161463] process_one_work+0x162/0x380 [ 6.161494] worker_thread+0x299/0x3c0 [ 6.161524] ? rescuer_thread+0x4c0/0x4c0 [ 6.161557] kthread+0x101/0x1f0 [ 6.161591] ? kthreads_online_cpu+0x110/0x110 [ 6.161636] ? kthreads_online_cpu+0x110/0x110 [ 6.161678] ret_from_fork+0x11c/0x140 [ 6.161712] ? kthreads_online_cpu+0x110/0x110 [ 6.161750] ret_from_fork_asm+0x11/0x20 [ 6.161783] [ 6.161806] ---[ end trace 0000000000000000 ]---