Andi Kleen wrote:
>>Could we get an accurate pointer to the statement that is  
>>causing the NULL deref?
> 
> 
> Andrey, can you recompile the kernel with CONFIG_DEBUG_INFO and 
> do a addr2line -e vmlinux <RIP from oops> ? 

Yes, I have done it:

ffffffff801549ac -> include/linux/list.h:150

and two more addresses up the stack:

ffffffff80154f10 -> mm/page_alloc.c:580
ffffffff801552e7 -> mm/page_alloc.c:965

I also attached the new oops log

Best regards,
Andrey