[ 2.525871] ------------[ cut here ]------------ [ 2.525973] refcount_t: underflow; use-after-free. [ 2.526093] WARNING: CPU: 3 PID: 67 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 2.526190] Modules linked in: [ 2.526245] CPU: 3 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 2.526382] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.526498] Workqueue: netns cleanup_net [ 2.526565] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 2.526653] Code: 92 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 92 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 [ 2.526879] RSP: 0018:ffffacc7c0257d50 EFLAGS: 00010286 [ 2.526939] RAX: 0000000000000000 RBX: ffffacc7c0257d60 RCX: 00000000ffffdfff [ 2.527018] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 2.527096] RBP: ffffacc7c0257858 R08: ffffffff9315ba28 R09: 00000000ffffdfff [ 2.527176] R10: ffffffff9307ba40 R11: ffffffff9312ba40 R12: dead000000000122 [ 2.527254] R13: 00000000fffb757b R14: 0000000000000001 R15: ffff9927c4e7a000 [ 2.527342] FS: 0000000000000000(0000) GS:ffff99286b511000(0000) knlGS:0000000000000000 [ 2.527430] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.527498] CR2: 00007fcba886a4d8 CR3: 0000000019646006 CR4: 0000000000772ef0 [ 2.527578] PKRU: 55555554 [ 2.527610] Call Trace: [ 2.527640] [ 2.527672] netdev_run_todo+0x21a/0x550 [ 2.527723] ops_undo_list+0x1e3/0x1f0 [ 2.527771] cleanup_net+0x1b7/0x300 [ 2.527817] process_one_work+0x162/0x380 [ 2.527870] worker_thread+0x299/0x3c0 [ 2.527915] ? rescuer_thread+0x4c0/0x4c0 [ 2.527960] kthread+0x101/0x1f0 [ 2.528009] ? kthreads_online_cpu+0x110/0x110 [ 2.528069] ? kthreads_online_cpu+0x110/0x110 [ 2.528123] ret_from_fork+0x11c/0x140 [ 2.528169] ? kthreads_online_cpu+0x110/0x110 [ 2.528223] ret_from_fork_asm+0x11/0x20 [ 2.528272] [ 2.528303] ---[ end trace 0000000000000000 ]---