From: Dan Carpenter <error27@gmail.com>
Date: Tue, 1 Jun 2010 08:23:11 +0000 (+0000)
Subject: Btrfs: uninitialized data is check_path_shared()
X-Git-Tag: upstream/snapshot3+hdmi~13881^2~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0e4dcbef1c0c3e29f9c7f824359445d385b2649a;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

Btrfs: uninitialized data is check_path_shared()

refs can be used with uninitialized data if btrfs_lookup_extent_info()
fails on the first pass through the loop.  In the original code if that
happens then check_path_shared() probably returns 1, this patch
changes it to return 1 for safety.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d999c53..f08427c 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2673,7 +2673,7 @@ static int check_path_shared(struct btrfs_root *root,
 	struct extent_buffer *eb;
 	int level;
 	int ret;
-	u64 refs;
+	u64 refs = 1;
 
 	for (level = 0; level < BTRFS_MAX_LEVEL; level++) {
 		if (!path->nodes[level])