3.16.7-ckt2 -stable review patch. If anyone has any objections, please let me know.
------------------
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: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
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 64c60edcdfbc..63fc7f06a014 100644
--- 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;
--
2.1.0
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