diff --git a/mm/percpu-stats.c b/mm/percpu-stats.c
index 063ff60..b5fdd43 100644
--- a/mm/percpu-stats.c
+++ b/mm/percpu-stats.c
@@ -144,7 +144,7 @@
 	spin_unlock_irq(&pcpu_lock);
 
 	/* there can be at most this many free and allocated fragments */
-	buffer = vmalloc((2 * max_nr_alloc + 1) * sizeof(int));
+	buffer = vmalloc(array_size(sizeof(int), (2 * max_nr_alloc + 1)));
 	if (!buffer)
 		return -ENOMEM;