[ 1.876887] ------------[ cut here ]------------ [ 1.877013] refcount_t: underflow; use-after-free. [ 1.877082] WARNING: CPU: 0 PID: 66 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110 [ 1.877165] Modules linked in: veth [ 1.877205] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) [ 1.877295] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1.877359] Workqueue: netns cleanup_net [ 1.877404] RIP: 0010:refcount_warn_saturate+0xbc/0x110 [ 1.877457] Code: bd e8 f8 c3 ba ff 90 0f 0b 90 90 c3 80 3d 39 c1 eb 00 00 75 89 c6 05 30 c1 eb 00 01 90 48 c7 c7 30 a0 f1 bd e8 d5 c3 ba ff 90 <0f> 0b 90 90 c3 80 3d 14 c1 eb 00 00 0f 85 62 ff ff ff c6 05 07 c1 [ 1.877620] RSP: 0018:ffffad070024fd50 EFLAGS: 00010286 [ 1.877673] RAX: 0000000000000000 RBX: ffffad070024fd60 RCX: 00000000ffffdfff [ 1.877748] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001 [ 1.877823] RBP: ffffad070024f880 R08: ffffffffbe356a28 R09: 00000000ffffdfff [ 1.877906] R10: ffffffffbe276a40 R11: ffffffffbe326a40 R12: dead000000000122 [ 1.877987] R13: 00000000fffb72e4 R14: 0000000000000001 R15: ffff98fe055e1000 [ 1.878060] FS: 0000000000000000(0000) GS:ffff98fe801e2000(0000) knlGS:0000000000000000 [ 1.878135] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.878197] CR2: 00007f13b7a3d000 CR3: 0000000005530002 CR4: 0000000000772ef0 [ 1.878266] PKRU: 55555554 [ 1.878295] Call Trace: [ 1.878320] [ 1.878349] netdev_run_todo+0x21a/0x550 [ 1.878398] ops_undo_list+0x1e3/0x1f0 [ 1.878440] cleanup_net+0x1b7/0x2b0 [ 1.878480] process_one_work+0x162/0x380 [ 1.878528] worker_thread+0x299/0x3c0 [ 1.878567] ? rescuer_thread+0x4c0/0x4c0 [ 1.878610] kthread+0x101/0x1f0 [ 1.878653] ? kthreads_online_cpu+0x110/0x110 [ 1.878706] ? kthreads_online_cpu+0x110/0x110 [ 1.878761] ret_from_fork+0x11c/0x140 [ 1.878804] ? kthreads_online_cpu+0x110/0x110 [ 1.878860] ret_from_fork_asm+0x11/0x20 [ 1.878907] [ 1.878937] ---[ end trace 0000000000000000 ]---