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

> * Pavel Machek <> 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.
. 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, 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,
(cesky, pictures)
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