Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic id = 0
fault virtual address	= 0x10
fault code		= supervisor read data, page not present
instruction pointer	= 0x8:0xffffffff804bf4ab
stack pointer	        = 0x10:0xfffff80117d196f8
frame pointer	        = 0x10:0xfffff80117d19738
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 848
current thread          = pri 6 
trap number		= 12
panic: page fault
cpuid = 0
Trace beginning at frame 0xfffff80117d194e8
trap_fatal() at trap_fatal+0x301 0xffffffff80bd5a51 
trap_fatal() at trap_fatal+0x301 0xffffffff80bd5a51 
trap_pfault() at trap_pfault+0x431 0xffffffff80bd6031 
trap() at trap+0x17c 0xffffffff80bd659c 
calltrap() at calltrap+0x9 0xffffffff80b99bca 
--- trap 000000000000000c, rip = ffffffff804bf4ab, rsp = fffff80117d196e0, rbp = fffff80117d19738 ---
fw_ioctl() at fw_ioctl+0x6eb 0xffffffff804bf4ab 
dev_dioctl() at dev_dioctl+0xa3 0xffffffff8062ce13 
boot() called on cpu#0
Uptime: 33s
Physical memory: 4060 MB
Dumping 678 MB: 663 647 631 615 599 583 567 551 535 519 503 487 471 455 439 423 407 391 375 359 343 327 311 295 279 263 247 231 215 199 183 167 151 135 119 103 87 71 55 39 23 7
Dump complete