Fatal user address access from kernel mode from rman_leak at ffffffff8068d200


Fatal trap 12: page fault while in kernel mode
cpuid = 1; lapic id = 1
fault virtual address	= 0x59
fault code		= supervisor read data, page not present
instruction pointer	= 0x8:0xffffffff8068d200
stack pointer	        = 0x10:0xfffff801185eb6c0
frame pointer	        = 0x10:0xfffff801185eb798
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		= 918
current thread          = pri 6 
kernel: type 12 trap, code=0

CPU1 stopping CPUs: 0x0000003d
 stopped
Stopped at      device_get_name:        movq    0x48(%rdi),%rax
db>