buildroot/package/libxml2/libxml2-3-xpath-memory.patch

From 0cbeb50ee03ce582a0c979c70d8fbf030e270c37 Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Mon, 15 Nov 2010 11:06:29 +0000
Subject: Fix a potential memory access error

in case of a previus allocation error
---
diff --git a/xpath.c b/xpath.c
index 4d6826d..81e33f6 100644
--- a/xpath.c
+++ b/xpath.c
@@ -3575,13 +3575,13 @@ xmlXPathNodeSetAdd(xmlNodeSetPtr cur, xmlNodePtr val) {
     } else if (cur->nodeNr == cur->nodeMax) {
         xmlNodePtr *temp;
 
-        cur->nodeMax *= 2;
-	temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax *
+	temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * 2 *
 				      sizeof(xmlNodePtr));
 	if (temp == NULL) {
 	    xmlXPathErrMemory(NULL, "growing nodeset\n");
 	    return;
 	}
+        cur->nodeMax *= 2;
 	cur->nodeTab = temp;
     }
     if (val->type == XML_NAMESPACE_DECL) {
--
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