Fatal user address access from kernel mode from df_primitive at 0000000000000000


Fatal trap 12: page fault while in kernel mode
cpuid = 2; lapic id = 2
fault virtual address	= 0x0
fault code		= supervisor read instruction, page not present
instruction pointer	= 0x8:0x0
stack pointer	        = 0x10:0xfffff8011863f938
frame pointer	        = 0x10:0x0
code segment		= base 0x0, limit 0xfffff, type 1b
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 1059 (unprivileged user running /tmp/df_primitive)
kernel: type 12 trap, code=10

CPU2 stopping CPUs: 0x0000003b
 stopped