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From: Pavel Machek <pavel@ucw.cz>
To: "Benjamin C. Ling" <bling@CS.Stanford.EDU>
Cc: linux-kernel@vger.kernel.org
Subject: Re: how to inject memory bitflips for maximum damage?
Date: Mon, 1 Sep 2003 16:06:54 +0200	[thread overview]
Message-ID: <20030901140654.GE1358@openzaurus.ucw.cz> (raw)
In-Reply-To: <Pine.LNX.4.44.0308231439040.19230-100000@Xenon.Stanford.EDU>

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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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...


      reply	other threads:[~2003-09-02 12:44 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-23 21:39 Benjamin C. Ling
2003-09-01 14:06 ` Pavel Machek [this message]

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