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[CVE-2023-28484] Fix null deref in xmlSchemaFixupComplexType
Fix a null pointer dereference when parsing (invalid) XML schemas. Thanks to Robby Simpson for the report! Fixes #491.
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./test/schemas/issue491_0.xsd:8: element complexType: Schemas parser error : complex type 'ChildType': The content type of both, the type and its base type, must either 'mixed' or 'element-only'. |
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<Child xmlns="http://www.test.com">5</Child> |
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<?xml version='1.0' encoding='UTF-8'?> | ||
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://www.test.com" targetNamespace="http://www.test.com" elementFormDefault="qualified" attributeFormDefault="unqualified"> | ||
<xs:complexType name="BaseType"> | ||
<xs:simpleContent> | ||
<xs:extension base="xs:int" /> | ||
</xs:simpleContent> | ||
</xs:complexType> | ||
<xs:complexType name="ChildType"> | ||
<xs:complexContent> | ||
<xs:extension base="BaseType"> | ||
<xs:sequence> | ||
<xs:element name="bad" type="xs:int" minOccurs="0" maxOccurs="1"/> | ||
</xs:sequence> | ||
</xs:extension> | ||
</xs:complexContent> | ||
</xs:complexType> | ||
<xs:element name="Child" type="ChildType" /> | ||
</xs:schema> |
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