[    2.428371] tun: Universal TUN/TAP device driver, 1.6
[    3.501091] ------------[ cut here ]------------
[    3.501225] refcount_t: underflow; use-after-free.
[    3.501301] WARNING: CPU: 1 PID: 255 at lib/refcount.c:28 refcount_warn_saturate+0xbc/0x110
[    3.501402] Modules linked in: xt_tcpudp xt_conntrack nft_compat nf_tables x_tables nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 tun
[    3.501540] CPU: 1 UID: 0 PID: 255 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(voluntary) 
[    3.501638] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.501721] RIP: 0010:refcount_warn_saturate+0xbc/0x110
[    3.501774] Code: 9e e8 18 ed b9 ff 90 0f 0b 90 90 c3 80 3d d9 ea ea 00 00 75 89 c6 05 d0 ea ea 00 01 90 48 c7 c7 78 de 91 9e e8 f5 ec b9 ff 90 <0f> 0b 90 90 c3 80 3d b4 ea ea 00 00 0f 85 62 ff ff ff c6 05 a7 ea
[    3.501957] RSP: 0018:ffffa6cd0058fe50 EFLAGS: 00010286
[    3.502008] RAX: 0000000000000000 RBX: ffffa6cd0058fe60 RCX: 00000000ffffdfff
[    3.502091] RDX: 0000000000000000 RSI: 00000000ffffffea RDI: 0000000000000001
[    3.502173] RBP: ffffa6cd0058f968 R08: ffffffff9ed56d28 R09: 00000000ffffdfff
[    3.502252] R10: ffffffff9ec76d40 R11: ffffffff9ed26d40 R12: dead000000000122
[    3.502336] R13: 00000000fffb793e R14: 0000000000000001 R15: ffff957cc1ee8000
[    3.502418] FS:  000000001bb013c0(0000) GS:ffff957d5f858000(0000) knlGS:0000000000000000
[    3.502503] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.502568] CR2: 00007fd94ad35000 CR3: 0000000003f8c005 CR4: 0000000000772ef0
[    3.502648] PKRU: 55555554
[    3.502674] Call Trace:
[    3.502701]  <TASK>
[    3.502725]  netdev_run_todo+0x21a/0x550
[    3.502775]  ? __tun_detach+0x2ed/0x490 [tun]
[    3.502831]  tun_chr_close+0x47/0xa0 [tun]
[    3.502869]  __fput+0xda/0x290
[    3.502918]  __x64_sys_close+0x3d/0x80
[    3.502957]  do_syscall_64+0xa4/0xfd0
[    3.503005]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    3.503070] RIP: 0033:0x4901eb
[    3.503112] 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
[    3.503290] RSP: 002b:00007fff09c10d40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[    3.503377] RAX: ffffffffffffffda RBX: 00007fff09c11258 RCX: 00000000004901eb
[    3.503456] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000006
[    3.503532] RBP: 00007fff09c10d80 R08: 0000000000000000 R09: 0000000000000000
[    3.503609] R10: 000000001bb09040 R11: 0000000000000293 R12: 00007fff09c11218
[    3.503689] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[    3.503770]  </TASK>
[    3.503802] ---[ end trace 0000000000000000 ]---