diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 7dc6aa7..86897ee 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -181,14 +181,13 @@
 	}
 	addr = ALIGN(start, align);
 	size = PAGE_ALIGN(size);
+	if (unlikely(!size))
+		return NULL;
 
 	area = kmalloc_node(sizeof(*area), gfp_mask & GFP_LEVEL_MASK, node);
 	if (unlikely(!area))
 		return NULL;
 
-	if (unlikely(!size))
-		return NULL;
-
 	/*
 	 * We always allocate a guard page.
 	 */