kernel panics

[Matt Price]

what do you guys do to try and diagnose kernel panics?  I have one on
ubuntu right now that i can reliably reproduce just by running
powertop; the error before the freeze is:

klernel panic - not syncing: stack protector: kernel stack is
corrupted in ffffffff814760bd

this is on ubuntu lucid amd64, running on my lenovo thinkpad t410.
powertop probes a bunch of modules that don't always get used, which
may be why it activates the bug.  Anyway, i'm just not at all sure how
to locate the culprit.  Any suggestions?   Thanks,

Matt
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