This is a note to let you know that I've just added the patch titled
xen-blkback: fix leak on grant map error path
to the 3.17-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:
xen-blkback-fix-leak-on-grant-map-error-path.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 61cecca865280bef4f8a9748d0a9afa5df351ac2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= <roger.pau@xxxxxxxxxx>
Date: Mon, 15 Sep 2014 11:55:27 +0200
Subject: xen-blkback: fix leak on grant map error path
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From: =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= <roger.pau@xxxxxxxxxx>
commit 61cecca865280bef4f8a9748d0a9afa5df351ac2 upstream.
Fix leaking a page when a grant mapping has failed.
Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reported-and-Tested-by: Tao Chen <boby.chen@xxxxxxxxxx>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/block/xen-blkback/blkback.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -763,6 +763,7 @@ again:
BUG_ON(new_map_idx >= segs_to_map);
if (unlikely(map[new_map_idx].status != 0)) {
pr_debug(DRV_PFX "invalid buffer -- could not remap it\n");
+ put_free_pages(blkif, &pages[seg_idx]->page, 1);
pages[seg_idx]->handle = BLKBACK_INVALID_HANDLE;
ret |= 1;
goto next;
Patches currently in stable-queue which might be from roger.pau@xxxxxxxxxx are
queue-3.17/xen-blkback-fix-leak-on-grant-map-error-path.patch
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