login: Fatal user address access from kernel mode from kerbd at ffffffff80807cc4


Fatal trap 12: page fault while in kernel mode
cpuid = 3; lapic id = 3
fault virtual address	= 0x70
fault code		= supervisor read data, page not present
instruction pointer	= 0x8:0xffffffff80807cc4
stack pointer	        = 0x10:0xfffff80116f5c640
frame pointer	        = 0x10:0xfffff80116f5c928
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		= 872
current thread          = pri 6 
kernel: type 12 trap, code=0

CPU3 stopping CPUs: 0x00000037
 stopped
Stopped at      sys_nfssvc+0x3d4:       movl    0x70(%rdi),%eax
db>