diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 2d7b18eb7291..554c87bb4a86 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -2037,6 +2037,7 @@ void blkcg_maybe_throttle_current(void)
 	return;
 out:
 	rcu_read_unlock();
+	put_disk(disk);
 }
 
 /**