[ 1.972901] ------------[ cut here ]------------ [ 1.972969] refcount_t: underflow; use-after-free. [ 1.973027] WARNING: CPU: 0 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 1.973103] Modules linked in: [ 1.973140] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 1.973209] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1.973258] Workqueue: netns cleanup_net [ 1.973301] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 1.973346] Code: a1 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 15 a1 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 [ 1.973486] RSP: 0018:ffffb7794024fd50 EFLAGS: 00010286 [ 1.973526] RAX: 0000000000000000 RBX: ffffb7794024fd60 RCX: 00000000ffffdfff [ 1.973593] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 1.973656] RBP: ffffb7794024f858 R08: ffffffffa195ba28 R09: 00000000ffffdfff [ 1.973717] R10: ffffffffa187ba40 R11: ffffffffa192ba40 R12: dead000000000122 [ 1.973772] R13: 00000000fffb7359 R14: 0000000000000001 R15: ffff8f4106972000 [ 1.973829] FS: 0000000000000000(0000) GS:ffff8f419cb91000(0000) knlGS:0000000000000000 [ 1.973895] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.973948] CR2: 00007f731f1e2658 CR3: 000000000690f001 CR4: 0000000000772ef0 [ 1.974013] PKRU: 55555554 [ 1.974037] Call Trace: [ 1.974064] [ 1.974086] netdev_run_todo+0x21a/0x550 [ 1.974125] ops_undo_list+0x1e3/0x1f0 [ 1.974170] cleanup_net+0x1b7/0x300 [ 1.974210] process_one_work+0x162/0x380 [ 1.974253] worker_thread+0x299/0x3c0 [ 1.974288] ? rescuer_thread+0x4c0/0x4c0 [ 1.974322] kthread+0x101/0x1f0 [ 1.974361] ? kthreads_online_cpu+0x110/0x110 [ 1.974406] ? kthreads_online_cpu+0x110/0x110 [ 1.974457] ret_from_fork+0x11c/0x140 [ 1.974499] ? kthreads_online_cpu+0x110/0x110 [ 1.974543] ret_from_fork_asm+0x11/0x20 [ 1.974585] [ 1.974609] ---[ end trace 0000000000000000 ]---