Groups > linux.debian.bugs.dist > #715074

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

From	Ben Hutchings <ben@decadent.org.uk>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#813327: linux-image-3.16.0-4-amd64: cryptroot + VIA padlock fails with message from testmgr.c
Date	2016-02-05 18:00 +0100
Message-ID	<qYRTI-2MX-9@gated-at.bofh.it> (permalink)
References	<qX3vX-63V-1@gated-at.bofh.it> <qY0cF-7kE-1@gated-at.bofh.it> <qYDnI-1Cc-9@gated-at.bofh.it> <qYR7j-2vG-15@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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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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Bug#813327: linux-image-3.16.0-4-amd64: cryptroot + VIA padlock fails with message from testmgr.c Carsten Wolff <carsten@wolffcarsten.de> - 2016-01-31 18:00 +0100
  Bug#813327: linux-image-3.16.0-4-amd64: cryptroot + VIA padlock fails with message from testmgr.c Ben Hutchings <ben@decadent.org.uk> - 2016-01-31 23:50 +0100
    Bug#813327: linux-image-3.16.0-4-amd64: cryptroot + VIA padlock fails with message from testmgr.c Carsten Wolff <carsten@wolffcarsten.de> - 2016-02-03 08:40 +0100
      Bug#813327: linux-image-3.16.0-4-amd64: cryptroot + VIA padlock fails with message from testmgr.c Ben Hutchings <ben@decadent.org.uk> - 2016-02-05 02:30 +0100
        Bug#813327: linux-image-3.16.0-4-amd64: cryptroot + VIA padlock fails with message from testmgr.c Carsten Wolff <carsten@wolffcarsten.de> - 2016-02-05 17:10 +0100
          Bug#813327: linux-image-3.16.0-4-amd64: cryptroot + VIA padlock fails with message from testmgr.c Ben Hutchings <ben@decadent.org.uk> - 2016-02-05 18:00 +0100

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