[ 4.328968] ------------[ cut here ]------------ [ 4.329055] refcount_t: underflow; use-after-free. [ 4.329157] WARNING: CPU: 0 PID: 67 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 4.329306] Modules linked in: [ 4.329352] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 4.329445] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 4.329502] Workqueue: netns cleanup_net [ 4.329557] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 4.329611] Code: b7 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 75 b7 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 [ 4.329804] RSP: 0018:ffffa68500257d50 EFLAGS: 00010286 [ 4.329885] RAX: 0000000000000000 RBX: ffffa68500257d60 RCX: 00000000ffffdfff [ 4.329969] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 4.330037] RBP: ffffa68500257858 R08: ffffffffb7f5ba28 R09: 00000000ffffdfff [ 4.330104] R10: ffffffffb7e7ba40 R11: ffffffffb7f2ba40 R12: dead000000000122 [ 4.330167] R13: 00000000fffb7c88 R14: 0000000000000001 R15: ffff94b286162000 [ 4.330235] FS: 0000000000000000(0000) GS:ffff94b306591000(0000) knlGS:0000000000000000 [ 4.330321] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4.330380] CR2: 0000564f4362ddec CR3: 0000000006216006 CR4: 0000000000772ef0 [ 4.330444] PKRU: 55555554 [ 4.330468] Call Trace: [ 4.330497] [ 4.330526] netdev_run_todo+0x21a/0x550 [ 4.330569] ops_undo_list+0x1e3/0x1f0 [ 4.330612] cleanup_net+0x1b7/0x300 [ 4.330649] process_one_work+0x162/0x380 [ 4.330693] worker_thread+0x299/0x3c0 [ 4.330732] ? rescuer_thread+0x4c0/0x4c0 [ 4.330778] kthread+0x101/0x1f0 [ 4.330820] ? kthreads_online_cpu+0x110/0x110 [ 4.330908] ? kthreads_online_cpu+0x110/0x110 [ 4.330955] ret_from_fork+0x11c/0x140 [ 4.331010] ? kthreads_online_cpu+0x110/0x110 [ 4.331060] ret_from_fork_asm+0x11/0x20 [ 4.331105] [ 4.331136] ---[ end trace 0000000000000000 ]---