From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sun, 9 Sep 2007 07:45:21 +0000 (+0100)
Subject: [CRYPTO] blkcipher: Fix handling of kmalloc page straddling
X-Git-Tag: v2.6.23-rc6~12^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e4630f9fd8cdc14eb1caa08dafe649eb5ae09985;p=pandora-kernel.git

[CRYPTO] blkcipher: Fix handling of kmalloc page straddling

The function blkcipher_get_spot tries to return a buffer of
the specified length that does not straddle a page.  It has
an off-by-one bug so it may advance a page unnecessarily.

What's worse, one of its callers doesn't provide a buffer
that's sufficiently long for this operation.

This patch fixes both problems.  Thanks to Bob Gilligan for
diagnosing this problem and providing a fix.

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