lkml.org 
[lkml]   [2010]   [Jun]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[patch] 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, but with this patch
it will continue through the loop.

I'm not super familiar with this code so please look it over carefully.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index fa6ccc1..9640dae 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 = 0;

for (level = 0; level < BTRFS_MAX_LEVEL; level++) {
if (!path->nodes[level])

\
 
 \ /
  Last update: 2010-06-01 10:25    [W:0.026 / U:0.416 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site