[PATCH v4] btrfs: Fix memory leakage in the tree-log.c

[Geyslan G. Bem]

When 'dir' is NULL, after calling extref_get_fields(), add_inode_ref()
can be returning without freeing the 'name' pointer.

Added kfree when necessary.

Signed-off-by: Geyslan G. Bem <geyslan@xxxxxxxxx>
---
 fs/btrfs/tree-log.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 79f057c..63c0b72 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1169,8 +1169,11 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans,
 			 */
 			if (!dir)
 				dir = read_one_inode(root, parent_objectid);
-			if (!dir)
+			if (!dir) {
+				if (!ret)
+					kfree(name);
 				return -ENOENT;
+			}
 		} else {
 			ret = ref_get_fields(eb, ref_ptr, &namelen, &name,
 					     &ref_index);
-- 
1.8.4

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