[    1.778463] xdummy0: entered promiscuous mode
[    1.785395] xdummy0: left promiscuous mode
[    1.794196] ------------[ cut here ]------------
[    1.794239] refcount_t: underflow; use-after-free.
[    1.794288] WARNING: CPU: 1 PID: 252 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    1.794354] Modules linked in:
[    1.794396] CPU: 1 UID: 0 PID: 252 Comm: tap Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    1.794464] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    1.794509] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    1.794549] 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 b5 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
[    1.794686] RSP: 0018:ffffa1b84059f868 EFLAGS: 00010286
[    1.794726] RAX: 0000000000000000 RBX: ffffa1b84059f878 RCX: 00000000ffffdfff
[    1.794779] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    1.794831] RBP: ffffa1b84059f370 R08: ffffffffbe35ba28 R09: 00000000ffffdfff
[    1.794883] R10: ffffffffbe27ba40 R11: ffffffffbe32ba40 R12: dead000000000122
[    1.794937] R13: 00000000fffb729d R14: 0000000000000001 R15: ffff928883030000
[    1.794989] FS:  00007f55c3874b80(0000) GS:ffff928900211000(0000) knlGS:0000000000000000
[    1.795049] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.795098] CR2: 00007f03000f0730 CR3: 000000000304e005 CR4: 0000000000772ef0
[    1.795162] PKRU: 55555554
[    1.795184] Call Trace:
[    1.795205]  <TASK>
[    1.795227]  netdev_run_todo+0x21a/0x550
[    1.795264]  rtnl_dellink+0x15b/0x350
[    1.795304]  ? update_load_avg+0x6f/0x350
[    1.795338]  ? set_next_entity+0xc8/0x240
[    1.795371]  ? finish_task_switch.isra.0+0x8d/0x270
[    1.795413]  ? rtnl_bridge_getlink+0x1a0/0x1a0
[    1.795455]  rtnetlink_rcv_msg+0x358/0x400
[    1.795489]  ? rtnl_calcit.isra.0+0x110/0x110
[    1.795530]  netlink_rcv_skb+0x57/0x100
[    1.795565]  netlink_unicast+0x252/0x380
[    1.795597]  ? __alloc_skb+0xdb/0x190
[    1.795623]  netlink_sendmsg+0x1be/0x3e0
[    1.795650]  __sys_sendto+0x12a/0x1b0
[    1.795686]  ? handle_mm_fault+0xda/0x240
[    1.795722]  ? do_user_addr_fault+0x20a/0x630
[    1.795760]  __x64_sys_sendto+0x24/0x30
[    1.795787]  do_syscall_64+0xa4/0xfd0
[    1.795820]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    1.795862] RIP: 0033:0x7f55c3987120
[    1.795897] Code: ff ff 64 89 02 eb bd 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 1d 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 68 c3 0f 1f 80 00 00 00 00 41 54 48 83 ec 20
[    1.796026] RSP: 002b:00007ffc62d5b618 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[    1.796085] RAX: ffffffffffffffda RBX: 0000000000000030 RCX: 00007f55c3987120
[    1.796139] RDX: 0000000000000030 RSI: 00007ffc62d5b620 RDI: 0000000000000005
[    1.796201] RBP: 00000000004047d0 R08: 0000000000000000 R09: 0000000000000000
[    1.796260] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
[    1.796314] R13: 00007ffc62d5b620 R14: 00007f55c3873000 R15: 0000000000407160
[    1.796376]  </TASK>
[    1.796393] ---[ end trace 0000000000000000 ]---
[    1.804282] tap (252) used greatest stack depth: 12048 bytes left
[    1.806377] xdummy0: entered promiscuous mode
[    1.812355] xdummy0: left promiscuous mode
[    1.825495] xdummy0: entered promiscuous mode
[    1.829574] xdummy0: left promiscuous mode