panic: vm_fault: fault on stack guard, addr: 0xfffff80117618000
cpuid = 0
Trace beginning at frame 0xfffff8008d1f84d8
vm_fault() at vm_fault+0x12eb 0xffffffff8099ef9b
vm_fault() at vm_fault+0x12eb 0xffffffff8099ef9b
trap_pfault() at trap_pfault+0x9a 0xffffffff80bd52ca
trap() at trap+0x17c 0xffffffff80bd5bcc
calltrap() at calltrap+0x9 0xffffffff80b991fa
--- trap 000000000000000c, rip = ffffffff80bcab4f, rsp = fffff8008d1f88e0, rbp = fffff8008d1f8920 ---
memmove() at memmove+0x24f 0xffffffff80bcab4f        <- bcopy, huge size_t
encap4_input() at encap4_input+0x20b 0xffffffff807aa07b   <- caller psw->pr_input == gre_mobile_input
Debugger("panic")

Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>