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lib: Fix overeager DTD destruction in XML_ExternalEntityParserCreate

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Sebastian Pipping 2022-09-20 02:44:34 +02:00
parent 391551620e
commit 5290462a7e
1 changed files with 8 additions and 0 deletions
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8
expat/lib/xmlparse.c
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@ -1068,6 +1068,14 @@ parserCreate(const XML_Char *encodingName,
parserInit(parser, encodingName);
if (encodingName && ! parser->m_protocolEncodingName) {
if (dtd) {
// We need to stop the upcoming call to XML_ParserFree from happily
// destroying parser->m_dtd because the DTD is shared with the parent
// parser and the only guard that keeps XML_ParserFree from destroying
// parser->m_dtd is parser->m_isParamEntity but it will be set to
// XML_TRUE only later in XML_ExternalEntityParserCreate (or not at all).
parser->m_dtd = NULL;
}
XML_ParserFree(parser);
return NULL;
}