Re: [kernel-hardening] rowhammer protection [was Re: Getting interrupt every million cache misses]

[Pavel Machek]

Hi!

> * Pavel Machek <pavel@xxxxxx> wrote:
> 
> > I'm not going to buy broken hardware just for a test.
> 
> Can you suggest a method to find heavily rowhammer affected hardware? Only by 
> testing it, or are there some chipset IDs ranges or dmidecode info that will 
> pinpoint potentially affected machines?

Testing can be used. https://github.com/mseaborn/rowhammer-test.git
. It finds faults at 1 of 2 machines here (but takes half an
hour). Then, if your hardware is one of ivy/sandy/haswell/skylake,
https://github.com/IAIK/rowhammerjs.git can be used for much faster
attack (many flips a second).

Unfortunately, what I have here is:

cpu family     : 6
model	       	 : 23
model name	 : Intel(R) Core(TM)2 Duo CPU     E7400  @ 2.80GHz
stepping	 : 10
microcode	 : 0xa07

so rowhammerjs/native is not available for this system. Bit mapping
for memory hash functions would need to be reverse engineered for more
effective attack.

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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