[    2.266435] ------------[ cut here ]------------
[    2.266604] refcount_t: underflow; use-after-free.
[    2.266681] WARNING: CPU: 2 PID: 228 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    2.266765] Modules linked in:
[    2.266819] CPU: 2 UID: 0 PID: 228 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    2.266950] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.267022] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    2.267085] Code: 9d e8 18 df ba ff 90 0f 0b 90 90 c3 80 3d 79 c9 eb 00 00 75 89 c6 05 70 c9 eb 00 01 90 48 c7 c7 f0 8d 51 9d e8 f5 de ba ff 90 <0f> 0b 90 90 c3 80 3d 54 c9 eb 00 00 0f 85 62 ff ff ff c6 05 47 c9
[    2.267253] RSP: 0018:ffffbd05c054fe50 EFLAGS: 00010286
[    2.267315] RAX: 0000000000000000 RBX: ffffbd05c054fe60 RCX: 00000000ffffdfff
[    2.267399] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    2.267475] RBP: ffffbd05c054f988 R08: ffffffff9d956a28 R09: 00000000ffffdfff
[    2.267555] R10: ffffffff9d876a40 R11: ffffffff9d926a40 R12: dead000000000122
[    2.267633] R13: 00000000fffb7475 R14: 0000000000000001 R15: ffff989a03100000
[    2.267712] FS:  000000003927c3c0(0000) GS:ffff989aa0ce6000(0000) knlGS:0000000000000000
[    2.267793] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.267869] CR2: 00007fa9c5234000 CR3: 0000000004823003 CR4: 0000000000772ef0
[    2.267948] PKRU: 55555554
[    2.267992] Call Trace:
[    2.268038]  <TASK>
[    2.268083]  netdev_run_todo+0x21a/0x550
[    2.268174]  ? __tun_detach+0x2ed/0x490
[    2.268238]  tun_chr_close+0x47/0xa0
[    2.268292]  __fput+0xda/0x290
[    2.268348]  __x64_sys_close+0x3d/0x80
[    2.268409]  do_syscall_64+0xa4/0xfd0
[    2.268466]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.268538] RIP: 0033:0x4901eb
[    2.268603] Code: 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 78 04 00 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 21 79 04 00 8b 44
[    2.268754] RSP: 002b:00007ffef7774710 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[    2.268832] RAX: ffffffffffffffda RBX: 00007ffef7774c68 RCX: 00000000004901eb
[    2.268908] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[    2.268985] RBP: 00007ffef7774750 R08: 0000000000000000 R09: 0000000000000000
[    2.269061] R10: 000000003928bcc0 R11: 0000000000000293 R12: 00007ffef7774be8
[    2.269137] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[    2.269223]  </TASK>
[    2.269269] ---[ end trace 0000000000000000 ]---