The commit is pushed to "branch-rh7-3.10.0-327.36.1.vz7.19.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-327.36.1.vz7.19.3
------>
commit ed0a88a97ef0a6400759a47a32fb61597de28433
Author: Herbert Xu <[email protected]>
Date: Mon Oct 24 16:34:09 2016 +0400
ms/crypto: scatterwalk - Fix test in scatterwalk_done
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.
Cc: [email protected]
Signed-off-by: Herbert Xu <[email protected]>
(cherry picked from commit 5f070e81bee35f1b7bd1477bb223a873ff657803)
Signed-off-by: Andrey Ryabinin <[email protected]>
---
crypto/scatterwalk.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index 7281b8a..79cbbbf 100644
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -68,7 +68,8 @@ static void scatterwalk_pagedone(struct scatter_walk *walk,
int out,
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);
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