diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
index 83e31b81db3ccf..80d3dcb8722c87 100644
--- a/drivers/block/null_blk_main.c
+++ b/drivers/block/null_blk_main.c
@@ -1817,6 +1817,7 @@ static int null_add_dev(struct nullb_device *dev)
 	cleanup_queues(nullb);
 out_free_nullb:
 	kfree(nullb);
+	dev->nullb = NULL;
 out:
 	return rv;
 }