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47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Rhodri James <rhodri@kynesim.co.uk>
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Date: Tue, 25 Apr 2017 16:21:27 +0100
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Subject: [PATCH] Validate parser parameter to XML_UseForeignDTD.
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---
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lib/expat.h | 5 ++++-
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lib/xmlparse.c | 2 ++
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2 files changed, 6 insertions(+), 1 deletion(-)
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diff --git a/lib/expat.h b/lib/expat.h
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index 086e24b3..957da1c5 100644
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--- a/lib/expat.h
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+++ b/lib/expat.h
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@@ -95,7 +95,9 @@ enum XML_Error {
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/* Added in 2.0. */
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XML_ERROR_RESERVED_PREFIX_XML,
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XML_ERROR_RESERVED_PREFIX_XMLNS,
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- XML_ERROR_RESERVED_NAMESPACE_URI
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+ XML_ERROR_RESERVED_NAMESPACE_URI,
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+ /* Added in 2.2 */
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+ XML_ERROR_INVALID_ARGUMENT
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};
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enum XML_Content_Type {
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@@ -706,6 +708,7 @@ XML_UseParserAsHandlerArg(XML_Parser parser);
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be called, despite an external subset being parsed.
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Note: If XML_DTD is not defined when Expat is compiled, returns
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XML_ERROR_FEATURE_REQUIRES_XML_DTD.
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+ Note: If parser == NULL, returns XML_ERROR_INVALID_ARGUMENT.
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*/
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XMLPARSEAPI(enum XML_Error)
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XML_UseForeignDTD(XML_Parser parser, XML_Bool useDTD);
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diff --git a/lib/xmlparse.c b/lib/xmlparse.c
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index ee71adad..065b04f8 100644
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--- a/lib/xmlparse.c
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+++ b/lib/xmlparse.c
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@@ -1243,6 +1243,8 @@ XML_UseParserAsHandlerArg(XML_Parser parser)
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enum XML_Error XMLCALL
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XML_UseForeignDTD(XML_Parser parser, XML_Bool useDTD)
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{
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+ if (parser == NULL)
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+ return XML_ERROR_INVALID_ARGUMENT;
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#ifdef XML_DTD
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/* block after XML_Parse()/XML_ParseBuffer() has been called */
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if (ps_parsing == XML_PARSING || ps_parsing == XML_SUSPENDED)
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