From 1f17487aa952a11f2ac53481b26b5a25b9a2fccc Mon Sep 17 00:00:00 2001
From: Michaël Meyer <hierophanie@gmail.com>
Date: Thu, 4 Feb 2016 04:01:19 +0100
Subject: Fix overrun

---
 test/iterate.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'test')

diff --git a/test/iterate.c b/test/iterate.c
index 30b307d..c1674b7 100644
--- a/test/iterate.c
+++ b/test/iterate.c
@@ -13,11 +13,17 @@ static void testbytes(unsigned char *buf, int len, utf8proc_ssize_t retval, int
     utf8proc_int32_t out[16];
     utf8proc_ssize_t ret;
 
+    /* Make a copy to ensure that memory is left uninitialized after "len"
+     * bytes. This way, Valgrind can detect overreads.
+     */
+    unsigned char tmp[16];
+    memcpy(tmp, buf, len);
+
     tests++;
-    if ((ret = utf8proc_iterate(buf, len, out)) != retval) {
+    if ((ret = utf8proc_iterate(tmp, len, out)) != retval) {
         fprintf(stderr, "Failed (%d):", line);
         for (int i = 0; i < len ; i++) {
-            fprintf(stderr, " 0x%02x", buf[i]);
+            fprintf(stderr, " 0x%02x", tmp[i]);
         }
         fprintf(stderr, " -> %zd\n", ret);
         error++;
-- 
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