diff --git a/kernel/watch_queue.c b/kernel/watch_queue.c
index 54cbaa971139..ae31bf8d2feb 100644
--- a/kernel/watch_queue.c
+++ b/kernel/watch_queue.c
@@ -338,7 +338,7 @@ long watch_queue_set_filter(struct pipe_inode_info *pipe,
 	    filter.__reserved != 0)
 		return -EINVAL;
 
-	tf = memdup_user(_filter->filters, filter.nr_filters * sizeof(*tf));
+	tf = memdup_array_user(_filter->filters, filter.nr_filters, sizeof(*tf));
 	if (IS_ERR(tf))
 		return PTR_ERR(tf);