ng_device_connect()
ngdopen()
DOUBLE FAULT

Fatal double fault
rip = 0xffffffff8263e5b8
rsp = 0xfffff801185d1758
rbp = 0xfffff801186d1788
cpuid = 0; lapic id = 0
panic: double fault
cpuid = 0
Trace beginning at frame 0xffffffff818caec8
dblfault_handler() at dblfault_handler+0x10c 0xffffffff80bd682c 
dblfault_handler() at dblfault_handler+0x10c 0xffffffff80bd682c 
Debugger("panic")

CPU0 stopping CPUs: 0x0000003e
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>