[libxslt] Transfer XPath limits to XPtr context
- From: Nick Wellnhofer <nwellnhof src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [libxslt] Transfer XPath limits to XPtr context
- Date: Mon, 17 Aug 2020 12:14:07 +0000 (UTC)
commit 824657768aea2cce9c23e72ba8085cb5e44350c7
Author: Nick Wellnhofer <wellnhofer aevum de>
Date: Mon Aug 17 04:27:13 2020 +0200
Transfer XPath limits to XPtr context
Expressions like document('doc.xml#xpointer(evil_expr)') ignored the
XPath limits.
libxslt/functions.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
---
diff --git a/libxslt/functions.c b/libxslt/functions.c
index b350545a..975ea790 100644
--- a/libxslt/functions.c
+++ b/libxslt/functions.c
@@ -178,10 +178,22 @@ xsltDocumentFunctionLoadDocument(xmlXPathParserContextPtr ctxt, xmlChar* URI)
goto out_fragment;
}
+#if LIBXML_VERSION >= 20911 || \
+ defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
+ xptrctxt->opLimit = ctxt->context->opLimit;
+ xptrctxt->opCount = ctxt->context->opCount;
+ xptrctxt->maxDepth = ctxt->context->maxDepth - ctxt->context->depth;
+
+ resObj = xmlXPtrEval(fragment, xptrctxt);
+
+ ctxt->context->opCount = xptrctxt->opCount;
+#else
resObj = xmlXPtrEval(fragment, xptrctxt);
- xmlXPathFreeContext(xptrctxt);
#endif
+ xmlXPathFreeContext(xptrctxt);
+#endif /* LIBXML_XPTR_ENABLED */
+
if (resObj == NULL)
goto out_fragment;
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