This is a note to let you know that I've just added the patch titled
crypto: hash - Fix page length clamping in hash walk
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-hash-fix-page-length-clamping-in-hash-walk.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 13f4bb78cf6a312bbdec367ba3da044b09bf0e29 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Wed, 4 May 2016 17:52:56 +0800
Subject: crypto: hash - Fix page length clamping in hash walk
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
crypto/ahash.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -64,8 +64,9 @@ static int hash_walk_new_entry(struct cr
struct scatterlist *sg;
sg = walk->sg;
- walk->pg = sg_page(sg);
walk->offset = sg->offset;
+ walk->pg = sg_page(walk->sg) + (walk->offset >> PAGE_SHIFT);
+ walk->offset = offset_in_page(walk->offset);
walk->entrylen = sg->length;
if (walk->entrylen > walk->total)
Patches currently in stable-queue which might be from herbert@xxxxxxxxxxxxxxxxxxx are
queue-3.14/crypto-hash-fix-page-length-clamping-in-hash-walk.patch
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