Patch "crypto: scatterwalk - Fix test in scatterwalk_done" has been added to the 4.6-stable tree

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 4.6-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-4.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Herbert Xu <[email protected]>
Date: Tue, 12 Jul 2016 13:17:57 +0800
Subject: crypto: scatterwalk - Fix test in scatterwalk_done

From: Herbert Xu <[email protected]>

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.

---
 crypto/scatterwalk.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -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 [email protected] are

queue-4.6/crypto-gcm-filter-out-async-ghash-if-necessary.patch queue-4.6/crypto-scatterwalk-fix-test-in-scatterwalk_done.patch