3.13.11.10 -stable review patch.  If anyone has any objections, please let me 
know.

------------------

From: =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= <[email protected]>

commit 61cecca865280bef4f8a9748d0a9afa5df351ac2 upstream.

Fix leaking a page when a grant mapping has failed.

Signed-off-by: Roger Pau MonnĂ© <[email protected]>
Reported-and-Tested-by: Tao Chen <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: Kamal Mostafa <[email protected]>
---
 drivers/block/xen-blkback/blkback.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/xen-blkback/blkback.c 
b/drivers/block/xen-blkback/blkback.c
index 6620b73..6beaaf8 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -755,6 +755,7 @@ 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;
-- 
1.9.1

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