[PATCH 4.18 148/168] ovl: fix memory leak on unlink of indexed file

[Greg Kroah-Hartman]

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Amir Goldstein <amir73il@xxxxxxxxx>

commit 63e132528032ce937126aba591a7b37ec593a6bb upstream.

The memory leak was detected by kmemleak when running xfstests
overlay/051,053

Fixes: caf70cb2ba5d ("ovl: cleanup orphan index entries")
Cc: <stable@xxxxxxxxxxxxxxx> # v4.13
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/overlayfs/util.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -531,7 +531,7 @@ static void ovl_cleanup_index(struct den
 	struct dentry *upperdentry = ovl_dentry_upper(dentry);
 	struct dentry *index = NULL;
 	struct inode *inode;
-	struct qstr name;
+	struct qstr name = { };
 	int err;
 
 	err = ovl_get_index_name(lowerdentry, &name);
@@ -574,6 +574,7 @@ static void ovl_cleanup_index(struct den
 		goto fail;
 
 out:
+	kfree(name.name);
 	dput(index);
 	return;