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Bug#813327: linux-image-3.16.0-4-amd64: cryptroot + VIA padlock fails with message from testmgr.c



On Fri, 2016-02-05 at 16:58 +0100, Carsten Wolff wrote:
> On Friday 05 February 2016 01:10:37 Ben Hutchings wrote:
> > I found what seems to be a bug in the driver, but it was present in
> > both 3.2 and 3.16.  Please test whether the attached patch fixes this
> > issue
> 
> Hum, the patch only fixes the decision, if and when the key is reset before an 
> operation, but not, which cword is used in actual operations, right? So it 
> shouldn't change anything in the result?

Apparently if this is not done when switching keys, the Padlock unit
might use stale data derived from the previous key.  However, I don't
think it's a huge risk in practice.

> At least, it does not fix the error 
> I'm seeing. The message stays the same, including the 32 byte it dumps.

Then I'm out of ideas.  I'll pass this to the upstream developers.

Ben.

-- 
Ben Hutchings
It is a miracle that curiosity survives formal education. - Albert Einstein

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