[ 2.852722] ------------[ cut here ]------------ [ 2.852918] refcount_t: underflow; use-after-free. [ 2.853009] WARNING: CPU: 2 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 2.853100] Modules linked in: [ 2.853160] CPU: 2 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 2.853252] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.853325] Workqueue: netns cleanup_net [ 2.853388] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 2.853451] Code: ae 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 35 ae 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 [ 2.853633] RSP: 0018:ffffac314024fd50 EFLAGS: 00010286 [ 2.853723] RAX: 0000000000000000 RBX: ffffac314024fd60 RCX: 00000000ffffdfff [ 2.853803] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 2.853886] RBP: ffffac314024f858 R08: ffffffffaeb5ba28 R09: 00000000ffffdfff [ 2.853980] R10: ffffffffaea7ba40 R11: ffffffffaeb2ba40 R12: dead000000000122 [ 2.854075] R13: 00000000fffb76c0 R14: 0000000000000001 R15: ffff9586457cf000 [ 2.854191] FS: 0000000000000000(0000) GS:ffff9586cfa91000(0000) knlGS:0000000000000000 [ 2.854293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.854432] CR2: 00007f38c6a1d000 CR3: 000000002de46004 CR4: 0000000000772ef0 [ 2.854511] PKRU: 55555554 [ 2.854579] Call Trace: [ 2.854629] [ 2.854686] netdev_run_todo+0x21a/0x550 [ 2.854754] ops_undo_list+0x1e3/0x1f0 [ 2.854819] cleanup_net+0x1b7/0x300 [ 2.854876] process_one_work+0x162/0x380 [ 2.854940] worker_thread+0x299/0x3c0 [ 2.855001] ? rescuer_thread+0x4c0/0x4c0 [ 2.855066] kthread+0x101/0x1f0 [ 2.855124] ? kthreads_online_cpu+0x110/0x110 [ 2.855186] ? kthreads_online_cpu+0x110/0x110 [ 2.855251] ret_from_fork+0x11c/0x140 [ 2.855320] ? kthreads_online_cpu+0x110/0x110 [ 2.855382] ret_from_fork_asm+0x11/0x20 [ 2.855442] [ 2.855487] ---[ end trace 0000000000000000 ]---