From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Wed, 4 May 2016 09:52:56 +0000 (+0800)
Subject: crypto: hash - Fix page length clamping in hash walk
X-Git-Tag: v3.2.81~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=05c5678247404392ef9b0e57b1f1250a50db0aa7;p=pandora-kernel.git

crypto: hash - Fix page length clamping in hash walk

commit 13f4bb78cf6a312bbdec367ba3da044b09bf0e29 upstream.

The crypto hash walk code is broken when supplied with an offset
greater than or equal to PAGE_SIZE.  This patch fixes it by adjusting
walk->pg and walk->offset when this happens.

Reported-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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