[    2.593689] ------------[ cut here ]------------
[    2.593791] refcount_t: underflow; use-after-free.
[    2.593852] WARNING: CPU: 3 PID: 229 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    2.593931] Modules linked in:
[    2.593975] CPU: 3 UID: 0 PID: 229 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    2.594077] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.594151] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    2.594205] Code: bb 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 71 bb 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
[    2.594401] RSP: 0018:ffffb2afc0577e50 EFLAGS: 00010286
[    2.594465] RAX: 0000000000000000 RBX: ffffb2afc0577e60 RCX: 00000000ffffdfff
[    2.594551] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    2.594634] RBP: ffffb2afc0577988 R08: ffffffffbbb56a28 R09: 00000000ffffdfff
[    2.594724] R10: ffffffffbba76a40 R11: ffffffffbbb26a40 R12: dead000000000122
[    2.594806] R13: 00000000fffb75bf R14: 0000000000000001 R15: ffff88d882018000
[    2.594895] FS:  00000000184073c0(0000) GS:ffff88d902b66000(0000) knlGS:0000000000000000
[    2.594980] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.595050] CR2: 00007f5610227000 CR3: 0000000002f30006 CR4: 0000000000772ef0
[    2.595139] PKRU: 55555554
[    2.595166] Call Trace:
[    2.595196]  <TASK>
[    2.595224]  netdev_run_todo+0x21a/0x550
[    2.595274]  ? __tun_detach+0x2ed/0x490
[    2.595325]  tun_chr_close+0x47/0xa0
[    2.595368]  __fput+0xda/0x290
[    2.595421]  __x64_sys_close+0x3d/0x80
[    2.595468]  do_syscall_64+0xa4/0xfd0
[    2.595520]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.595577] RIP: 0033:0x4901eb
[    2.595618] 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
[    2.595814] RSP: 002b:00007ffd7e774fa0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[    2.595904] RAX: ffffffffffffffda RBX: 00007ffd7e7754f8 RCX: 00000000004901eb
[    2.595989] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[    2.596075] RBP: 00007ffd7e774fe0 R08: 0000000000000000 R09: 0000000000000000
[    2.596162] R10: 000000001840f4c0 R11: 0000000000000293 R12: 00007ffd7e775478
[    2.596248] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[    2.596335]  </TASK>
[    2.596363] ---[ end trace 0000000000000000 ]---