This is a note to let you know that I've just added the patch titled
crypto: scatterwalk - Fix test in scatterwalk_done
to the 4.4-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-scatterwalk-fix-test-in-scatterwalk_done.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5f070e81bee35f1b7bd1477bb223a873ff657803 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 12 Jul 2016 13:17:57 +0800
Subject: crypto: scatterwalk - Fix test in scatterwalk_done
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
commit 5f070e81bee35f1b7bd1477bb223a873ff657803 upstream.
When there is more data to be processed, the current test in
scatterwalk_done may prevent us from calling pagedone even when
we should.
In particular, if we're on an SG entry spanning multiple pages
where the last page is not a full page, we will incorrectly skip
calling pagedone on the second last page.
This patch fixes this by adding a separate test for whether we've
reached the end of a page.
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
crypto/scatterwalk.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -72,7 +72,8 @@ static void scatterwalk_pagedone(struct
void scatterwalk_done(struct scatter_walk *walk, int out, int more)
{
- if (!(scatterwalk_pagelen(walk) & (PAGE_SIZE - 1)) || !more)
+ if (!more || walk->offset >= walk->sg->offset + walk->sg->length ||
+ !(walk->offset & (PAGE_SIZE - 1)))
scatterwalk_pagedone(walk, out, more);
}
EXPORT_SYMBOL_GPL(scatterwalk_done);
Patches currently in stable-queue which might be from herbert@xxxxxxxxxxxxxxxxxxx are
queue-4.4/crypto-gcm-filter-out-async-ghash-if-necessary.patch
queue-4.4/crypto-scatterwalk-fix-test-in-scatterwalk_done.patch
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