Waiting for PIDS: 424panic: Bad tailq NEXT(0xfffff80003b66b50->tqh_last) != NULL
cpuid = 0
time = 1590679151
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0027a54140
vpanic() at vpanic+0x1c7/frame 0xfffffe0027a541a0
panic() at panic+0x43/frame 0xfffffe0027a54200
pf_tagname2tag() at pf_tagname2tag+0x2c5/frame 0xfffffe0027a54260
pfioctl() at pfioctl+0x7385/frame 0xfffffe0027a54790
devfs_ioctl() at devfs_ioctl+0x14e/frame 0xfffffe0027a547f0
VOP_IOCTL_APV() at VOP_IOCTL_APV+0x78/frame 0xfffffe0027a54820
vn_ioctl() at vn_ioctl+0x27c/frame 0xfffffe0027a54940
devfs_ioctl_f() at devfs_ioctl_f+0x47/frame 0xfffffe0027a54980
kern_ioctl() at kern_ioctl+0x3d4/frame 0xfffffe0027a549f0
sys_ioctl() at sys_ioctl+0x22b/frame 0xfffffe0027a54ac0
amd64_syscall() at amd64_syscall+0x262/frame 0xfffffe0027a54bf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0027a54bf0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x28289a, rsp = 0x7fffdff9af08, rbp = 0x7fffdff9af70 ---
KDB: enter: panic
[ thread pid 1479 tid 100925 ]
Stopped at      kdb_enter+0x67: movq    $0,0x14a7706(%rip)
db> 
db> serialport: VM disconnected.