Re: how to inject memory bitflips for maximum damage?

[Pavel Machek]

Hi!

> We have FAUmachine (a linux-based fault-injection VM) installed and
> running on our research cluster, and can inject memory-bitflips in our
> processes running on top of FAUmachine.
> 
> My question is -- how do I find out where to inject the bitflip for
> maximum damage (or even any damage at all).  I've done a bit of searching
> on google but haven't come up with much.
> 
> If anyone has any insight on where linux holds its critical memory
> structures, or where it places its running programs in physical memory,
> could you please let me know?  

Toggle some bit in kernel code... That should
kill it real soon. Look at System.map for some
good places. (do_irq?). Substract 0xC0000000 for
physical address.

BTW what is purpose of these experiments?

-- 
				Pavel
Written on sharp zaurus, because my Velo1 broke. If you have Velo you don't need...

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