ext4: Fix memory and buffer head leak in callers to ext4_ext_find_extent()

The path variable returned via ext4_ext_find_extent is a kmalloc
variable and needs to be freeded.  It also contains a reference to
buffer_head which needs to be dropped.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index e856f660fc30..995ac16102a9 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -349,7 +349,7 @@ static void ext4_ext_show_leaf(struct inode *inode, struct ext4_ext_path *path)
 #define ext4_ext_show_leaf(inode,path)
 #endif
 
-static void ext4_ext_drop_refs(struct ext4_ext_path *path)
+void ext4_ext_drop_refs(struct ext4_ext_path *path)
 {
         int depth = path->p_depth;
         int i;
@@ -2200,10 +2200,10 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
                 newdepth = ext_depth(inode);
                 if (newdepth != depth) {
                         depth = newdepth;
-                        path = ext4_ext_find_extent(inode, iblock, NULL);
+                        ext4_ext_drop_refs(path);
+                        path = ext4_ext_find_extent(inode, iblock, path);
                         if (IS_ERR(path)) {
                                 err = PTR_ERR(path);
-                                path = NULL;
                                 goto out;
                         }
                         eh = path[depth].p_hdr;