Reproducible git-fsck/SHA1 failures since 3.7.x on a Dell E6430 /i5-3340M

From: Ben Tebulin
Date: Fri Aug 09 2013 - 10:58:24 EST

Hello Kernel list!

On two machines a very specific repository the SHA1 implementation of
git-fsck and git-show fails in 9/10 cases for a specific 39MB blob.

This only occurs on vanilla Linux kernels 3.7.10, 3.8.0 (Ubuntu),
3.9.11, 3.10.5 _but not on_ 3.6.11 and 3.5.7

For details please refer to the thread starting at:

Never had any other hardware/stability issues _at all_ with these
machines. Only one repo out of 112 is affected. It's a git-svn clone and
even recreated copies out of svn do trigger the same failure.

Git mailing list ran out of ideas and for me this looks like some very
rare kernel issue. I'm not a kernel hacker. And to raise the challenge:
I can't share the repo easily, either.

Any hints how to tackle this issue?

- Ben

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