Fatal trap 12: page fault while in kernel mode
cpuid = 1; lapic id = 1
fault virtual address	= 0xfffff8007a6673fc
fault code		= supervisor write data, page not present
instruction pointer	= 0x8:0xffffffff80bca670
stack pointer	        = 0x10:0xfffff8011836f4f0
frame pointer	        = 0x10:0xfffff8011836f588
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 984
current thread          = pri 6 
kernel: type 12 trap, code=2

CPU1 stopping CPUs: 0x0000003d
 stopped
Stopped at      memset+0xf0:    movq    %r10,(%rdi)
db>