> Thanks, I installed your cryptotest suite including your new lukstest
> tool and ran some tests on a Banana Pi tonight. The results were all
> good. After a first successful run of lukstest, I modified the script
> and increased the sample size by a factor of 100 (and the image file,
> too). Even with the increased sample size, I didn't see any errors
> (because of the increased test duration, I ran only 5 iterations,
> though). Tests were done on an Armbian installation with Kernel 4.4.1
> (with your patch "Add missing state size" on top of it) in order to
> resemble the original reporters conditions more closely. I was
> planning to do tests with 4.4.2 as well, but since all tests succeeded
> so far, I don't think that would change anything.

[ Just a random shot in the dark from someone who knows nothing about
  these things.  ]

My guess is that to reproduce the problem, you need to have maybe the
same intertwined sequence of decryption and disk access (who I have no
idea what kind of disk he's using).
IOW it could be linked to some interference from the disk's interrupts
or something.


        Stefan

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