From: Szilveszter Ördög <slipszi@gmail.com>
Date: Wed, 3 Mar 2010 00:03:23 +0000 (+0800)
Subject: crypto: hash - Fix handling of unaligned buffers
X-Git-Tag: v2.6.34-rc1~198^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cbb9bf65ae25dee772e85589136e7dd1c3e743ae;p=pandora-kernel.git

crypto: hash - Fix handling of unaligned buffers

The correct way to calculate the start of the aligned part of an
unaligned buffer is:

  offset = ALIGN(offset, alignmask + 1);

However, crypto_hash_walk_done() has:

  offset += alignmask - 1;
  offset = ALIGN(offset, alignmask + 1);

which actually skips a whole block unless offset % (alignmask + 1) == 1.

This patch fixes the problem.

Signed-off-by: Szilveszter Ördög <slipszi@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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