Btrfs - Fix memory leak in btrfs_init_new_device()

Memory allocated by calling kstrdup() should be freed.
Signed-off-by: NIlya Dryomov <idryomov@gmail.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>

fs/btrfs/volumes.c

@@ -1603,12 +1603,14 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
 
 	ret = find_next_devid(root, &device->devid);
 	if (ret) {
+		kfree(device->name);
 		kfree(device);
 		goto error;
 	}
 
 	trans = btrfs_start_transaction(root, 0);
 	if (IS_ERR(trans)) {
+		kfree(device->name);
 		kfree(device);
 		ret = PTR_ERR(trans);
 		goto error;