[    2.196484] ------------[ cut here ]------------
[    2.196616] refcount_t: underflow; use-after-free.
[    2.196689] WARNING: CPU: 3 PID: 229 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    2.196767] Modules linked in:
[    2.196805] CPU: 3 UID: 0 PID: 229 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    2.196889] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.196945] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    2.196998] 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 91 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
[    2.197152] RSP: 0018:ffffa0420053fe50 EFLAGS: 00010286
[    2.197218] RAX: 0000000000000000 RBX: ffffa0420053fe60 RCX: 00000000ffffdfff
[    2.197301] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    2.197364] RBP: ffffa0420053f988 R08: ffffffff9dd56a28 R09: 00000000ffffdfff
[    2.197432] R10: ffffffff9dc76a40 R11: ffffffff9dd26a40 R12: dead000000000122
[    2.197513] R13: 00000000fffb741f R14: 0000000000000001 R15: ffff8afd84d10000
[    2.197585] FS:  000000002dc983c0(0000) GS:ffff8afe20966000(0000) knlGS:0000000000000000
[    2.197652] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.197709] CR2: 00007fc1d8253000 CR3: 0000000004cda001 CR4: 0000000000772ef0
[    2.197770] PKRU: 55555554
[    2.197793] Call Trace:
[    2.197820]  <TASK>
[    2.197850]  netdev_run_todo+0x21a/0x550
[    2.197901]  ? __tun_detach+0x2ed/0x490
[    2.197938]  tun_chr_close+0x47/0xa0
[    2.197977]  __fput+0xda/0x290
[    2.198016]  __x64_sys_close+0x3d/0x80
[    2.198054]  do_syscall_64+0xa4/0xfd0
[    2.198093]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.198141] RIP: 0033:0x4901eb
[    2.198176] 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
[    2.198305] RSP: 002b:00007ffe8691b590 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[    2.198365] RAX: ffffffffffffffda RBX: 00007ffe8691bae8 RCX: 00000000004901eb
[    2.198433] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[    2.198505] RBP: 00007ffe8691b5d0 R08: 0000000000000000 R09: 0000000000000000
[    2.198574] R10: 0000000000100000 R11: 0000000000000293 R12: 00007ffe8691ba68
[    2.198634] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[    2.198695]  </TASK>
[    2.198718] ---[ end trace 0000000000000000 ]---