Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic id = 0
fault virtual address	= 0xfffff800522f7000
fault code		= supervisor read data, page not present
instruction pointer	= 0x8:0xffffffff80bcaa0a
stack pointer	        = 0x10:0xfffff80117ee6640
frame pointer	        = 0x10:0xfffff80117ee6698
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		= 893
current thread          = pri 6 
trap number		= 12
panic: page fault
cpuid = 0
Trace beginning at frame 0xfffff80117ee6438
trap_fatal() at trap_fatal+0x301 0xffffffff80bd5081 
trap_fatal() at trap_fatal+0x301 0xffffffff80bd5081 
trap_pfault() at trap_pfault+0x475 0xffffffff80bd56a5 
trap() at trap+0x17c 0xffffffff80bd5bcc 
calltrap() at calltrap+0x9 0xffffffff80b991fa 
--- trap 000000000000000c, rip = ffffffff80bcaa0a, rsp = fffff80117ee6630, rbp = fffff80117ee6698 ---
memmove() at memmove+0x10a 0xffffffff80bcaa0a 
udf_root() at udf_root+0x25 0xffffffff82600785