linux-kernel - [PATCH] ext4: extents: len and lblock may be used uninitialized

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Date:	Thu, 25 Jul 2013 02:33:05 +0200
From:	Andi Shyti <andi@...zian.org>
To:	tytso@....edu, adilger.kernel@...ger.ca
Cc:	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	andi@...zian.org
Subject: [PATCH] ext4: extents: len and lblock may be used uninitialized

if ext_debugging is enabled and path[depth].p_ext is NULL, len
and lblock are printed non initialized

Signed-off-by: Andi Shyti <andi@...zian.org>
---
 fs/ext4/extents.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index a618738..acaf53c 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2195,8 +2195,8 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
 				ext4_lblk_t block)
 {
 	int depth = ext_depth(inode);
-	unsigned long len;
-	ext4_lblk_t lblock;
+	unsigned long len = 0;
+	ext4_lblk_t lblock = 0;
 	struct ext4_extent *ex;
 
 	ex = path[depth].p_ext;
@@ -2233,7 +2233,6 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
 			ext4_es_insert_extent(inode, lblock, len, ~0,
 					      EXTENT_STATUS_HOLE);
 	} else {
-		lblock = len = 0;
 		BUG();
 	}
 
-- 
1.8.3.2

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