[ 1.949151] ------------[ cut here ]------------ [ 1.949225] refcount_t: underflow; use-after-free. [ 1.949273] WARNING: CPU: 0 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 1.949339] Modules linked in: [ 1.949367] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 1.949430] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1.949474] Workqueue: netns cleanup_net [ 1.949510] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 1.949551] Code: bd 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 bd 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 [ 1.949672] RSP: 0018:ffff9ac7c024fd50 EFLAGS: 00010286 [ 1.949707] RAX: 0000000000000000 RBX: ffff9ac7c024fd60 RCX: 00000000ffffdfff [ 1.949772] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 1.949829] RBP: ffff9ac7c024f858 R08: ffffffffbe75ba28 R09: 00000000ffffdfff [ 1.949880] R10: ffffffffbe67ba40 R11: ffffffffbe72ba40 R12: dead000000000122 [ 1.949931] R13: 00000000fffb733f R14: 0000000000000001 R15: ffff89e004395000 [ 1.949984] FS: 0000000000000000(0000) GS:ffff89e07fd91000(0000) knlGS:0000000000000000 [ 1.950039] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.950089] CR2: 00007f5b7147c000 CR3: 000000002ec46001 CR4: 0000000000772ef0 [ 1.950155] PKRU: 55555554 [ 1.950177] Call Trace: [ 1.950197] [ 1.950213] netdev_run_todo+0x21a/0x550 [ 1.950249] ops_undo_list+0x1e3/0x1f0 [ 1.950279] cleanup_net+0x1b7/0x300 [ 1.950305] process_one_work+0x162/0x380 [ 1.950337] worker_thread+0x299/0x3c0 [ 1.950368] ? rescuer_thread+0x4c0/0x4c0 [ 1.950399] kthread+0x101/0x1f0 [ 1.950427] ? kthreads_online_cpu+0x110/0x110 [ 1.950467] ? kthreads_online_cpu+0x110/0x110 [ 1.950501] ret_from_fork+0x11c/0x140 [ 1.950534] ? kthreads_online_cpu+0x110/0x110 [ 1.950577] ret_from_fork_asm+0x11/0x20 [ 1.950605] [ 1.950626] ---[ end trace 0000000000000000 ]---