--- linux-2.6.orig/fs/splice.c
+++ linux-2.6/fs/splice.c
@@ -1237,6 +1237,9 @@ static int get_iovec_page_array(const st
 		if (unlikely(!base))
 			break;
 
+		if (unlikely(!access_ok(VERIFY_READ, base, len)))
+			break;
+
 		/*
 		 * Get this base offset and number of pages, then map
 		 * in the user pages.