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From df83c17e5a2646bd923f75e5e507bc80d73c9722 Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Wed, 17 Nov 2010 13:12:14 +0000
Subject: Fix a potential freeing error in XPath
---
diff --git a/xpath.c b/xpath.c
index 81e33f6..1447be5 100644
--- a/xpath.c
+++ b/xpath.c
@@ -11763,11 +11763,15 @@ xmlXPathCompOpEvalPositionalPredicate(xmlXPathParserContextPtr ctxt,
if ((ctxt->error != XPATH_EXPRESSION_OK) || (res == -1)) {
xmlXPathObjectPtr tmp;
- /* pop the result */
+ /* pop the result if any */
tmp = valuePop(ctxt);
- xmlXPathReleaseObject(xpctxt, tmp);
- /* then pop off contextObj, which will be freed later */
- valuePop(ctxt);
+ if (tmp != contextObj)
+ /*
+ * Free up the result
+ * then pop off contextObj, which will be freed later
+ */
+ xmlXPathReleaseObject(xpctxt, tmp);
+ valuePop(ctxt);
goto evaluation_error;
}
--
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