From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 14 Jul 2009 13:35:36 +0000 (+0800)
Subject: crypto: hash - Zap unaligned buffers
X-Git-Tag: v2.6.32-rc1~731^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8c32c516eb1c1f9c14d25478442137c698788975;p=pandora-kernel.git

crypto: hash - Zap unaligned buffers

Some unaligned buffers on the stack weren't zapped properly which
may cause secret data to be leaked.  This patch fixes them by doing
a zero memset.

It is also possible for us to place random kernel stack contents
in the digest buffer if a digest operation fails.  This is fixed
by only copying if the operation succeeded.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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