rbd: do not leak image_id in rbd_dev_v2_parent_info()

image_id is leaked if the parent happens to have been recorded already.
Fix it.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index d99aa81..adedb39 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -4072,6 +4072,8 @@ static int rbd_dev_v2_parent_info(struct rbd_device *rbd_dev)
                parent_spec->snap_id = snap_id;
                rbd_dev->parent_spec = parent_spec;
                parent_spec = NULL;     /* rbd_dev now owns this */
+       } else {
+               kfree(image_id);
        }
 
        /*