[    3.369592] ------------[ cut here ]------------
[    3.369737] refcount_t: underflow; use-after-free.
[    3.369816] WARNING: CPU: 0 PID: 228 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.369905] Modules linked in:
[    3.369945] CPU: 0 UID: 0 PID: 228 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.370025] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.370103] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.370175] Code: ba 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 11 ba 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
[    3.370364] RSP: 0018:ffffb7eec058fe50 EFLAGS: 00010286
[    3.370424] RAX: 0000000000000000 RBX: ffffb7eec058fe60 RCX: 00000000ffffdfff
[    3.370503] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.370575] RBP: ffffb7eec058f988 R08: ffffffffba556a28 R09: 00000000ffffdfff
[    3.370674] R10: ffffffffba476a40 R11: ffffffffba526a40 R12: dead000000000122
[    3.370747] R13: 00000000fffb78bd R14: 0000000000000001 R15: ffff93ab836c4000
[    3.370834] FS:  0000000019a363c0(0000) GS:ffff93ac03fe6000(0000) knlGS:0000000000000000
[    3.370903] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.370966] CR2: 00007f636b28c000 CR3: 0000000005829004 CR4: 0000000000772ef0
[    3.371032] PKRU: 55555554
[    3.371064] Call Trace:
[    3.371092]  <TASK>
[    3.371116]  netdev_run_todo+0x21a/0x550
[    3.371184]  ? __tun_detach+0x2ed/0x490
[    3.371241]  tun_chr_close+0x47/0xa0
[    3.371285]  __fput+0xda/0x290
[    3.371338]  __x64_sys_close+0x3d/0x80
[    3.371384]  do_syscall_64+0xa4/0xfd0
[    3.371439]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    3.371497] RIP: 0033:0x4901eb
[    3.371549] 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
[    3.371736] RSP: 002b:00007ffc00eb05c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[    3.371818] RAX: ffffffffffffffda RBX: 00007ffc00eb0b18 RCX: 00000000004901eb
[    3.371885] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[    3.371951] RBP: 00007ffc00eb0600 R08: 0000000000000000 R09: 0000000000000000
[    3.372022] R10: 0000000019a3df20 R11: 0000000000000293 R12: 00007ffc00eb0a98
[    3.372103] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[    3.372205]  </TASK>
[    3.372231] ---[ end trace 0000000000000000 ]---