addr2line on kernel module

Question

I\'m trying to debug kernel module. I suspect to have there some memory leaks. To check it I have prepared build with enabled Memory leak debugging for kernel and modules. A

Answer 1

You indeed need to run addr2line on your kernel module and not kernel but there is a twist -

the kernel module file uses relative addresses, the crash address you have is actually composed of:

offset inside module + module load address is memory.

So what you need to do is find the kernel moduel load address is memory first by doing cat /proc/modules, finding to what module that address belongs to, in case you don't know, subtract the module load address from the crash address and feed that to addr2line

good luck