Using crash to track down a system panic (RedHat)?

My google-fu is apparently too weak, so I turn to the Dope for help.

One of my systems panic’d because of a null pointer dereference in a kernel module. I’m trying to figure out exactly what pointer was null, using the system dump & RedHats “crash” utility. I can disassemble the function where the null pointer deref happened, but I don’t have any clue how to map the assembly back to the source, nor how to figure out which pointer was null.

Anyone?

Thanks