From: Filipe David Borba Manana <fdmanana@gmail.com>
Date: Mon, 25 Nov 2013 03:22:07 +0000 (+0000)
Subject: Btrfs: fix extent boundary check in bio_readpage_error
X-Git-Tag: upstream/snapshot3+hdmi~3409^2~120
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=68ba990f7d161c31e9eddd98727ba8393089047f;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

Btrfs: fix extent boundary check in bio_readpage_error

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d97250a..3721820 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2156,7 +2156,7 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
 			return -EIO;
 		}
 
-		if (em->start > start || em->start + em->len < start) {
+		if (em->start > start || em->start + em->len <= start) {
 			free_extent_map(em);
 			em = NULL;
 		}