[ 2.360910] ------------[ cut here ]------------ [ 2.360963] refcount_t: underflow; use-after-free. [ 2.361010] WARNING: CPU: 3 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 2.361070] Modules linked in: sch_fq [ 2.361102] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 2.361164] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2.361204] Workqueue: netns cleanup_net [ 2.361238] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 2.361277] Code: be 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 be 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 [ 2.361393] RSP: 0000:ffffb0c58024fd50 EFLAGS: 00010286 [ 2.361427] RAX: 0000000000000000 RBX: ffffb0c58024fd60 RCX: 00000000ffffdfff [ 2.361482] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 2.361532] RBP: ffffb0c58024f858 R08: ffffffffbf15ba28 R09: 00000000ffffdfff [ 2.361580] R10: ffffffffbf07ba40 R11: ffffffffbf12ba40 R12: dead000000000122 [ 2.361629] R13: 00000000fffb74db R14: 0000000000000001 R15: ffff967946042000 [ 2.361680] FS: 0000000000000000(0000) GS:ffff9679bf511000(0000) knlGS:0000000000000000 [ 2.361741] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2.361781] CR2: 00007fafa4b1c7e0 CR3: 00000000060d5001 CR4: 0000000000772ef0 [ 2.361832] PKRU: 55555554 [ 2.361846] Call Trace: [ 2.361864] [ 2.361883] netdev_run_todo+0x21a/0x550 [ 2.361916] ops_undo_list+0x1e3/0x1f0 [ 2.361946] cleanup_net+0x1b7/0x300 [ 2.361976] process_one_work+0x162/0x380 [ 2.362007] worker_thread+0x299/0x3c0 [ 2.362037] ? rescuer_thread+0x4c0/0x4c0 [ 2.362067] kthread+0x101/0x1f0 [ 2.362098] ? kthreads_online_cpu+0x110/0x110 [ 2.362136] ? kthreads_online_cpu+0x110/0x110 [ 2.362174] ret_from_fork+0x11c/0x140 [ 2.362206] ? kthreads_online_cpu+0x110/0x110 [ 2.362245] ret_from_fork_asm+0x11/0x20 [ 2.362276] [ 2.362291] ---[ end trace 0000000000000000 ]---