diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 4efc41a..0536dde 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -254,6 +254,10 @@
 		if (addr > end - size)
 			goto out;
 	}
+	if ((size + addr) < addr)
+		goto out;
+	if (addr > end - size)
+		goto out;
 
 found:
 	area->next = *p;