Fix oss-fuzz XMLParserTest over wstring_builder being nullptr (#5761)

* Refs #23030: Add test to regressions on XMLParserTests

Signed-off-by: Javier Gil Aviles <[email protected]>

* Refs #23030: Add case nullptr for wstring_builder on XMLDynamicParser.cpp

Signed-off-by: Javier Gil Aviles <[email protected]>

---------

Signed-off-by: Javier Gil Aviles <[email protected]>

Author: Javgilavi

src/cpp/xmlparser/XMLDynamicParser.cpp

@@ -1833,6 +1833,13 @@ DynamicType::_ref_type XMLParser:: parseXMLMemberDynamicType(
 
         DynamicTypeBuilder::_ref_type wstring_builder = factory->create_wstring_type(bound);
 
+        if (nullptr == wstring_builder)
+        {
+            EPROSIMA_LOG_ERROR(XMLPARSER,
+                    "Error creating wstring type: " << memberType);
+            return {};
+        }
+
         if (!isArray)
         {
             member = wstring_builder->build();

test/unittest/xmlparser/XMLParserTests.cpp

@@ -89,6 +89,7 @@ TEST_F(XMLParserTests, regressions)
     EXPECT_EQ(XMLP_ret::XML_ERROR, XMLParser::loadXML("regressions/22535_profile_bin.xml", root));
     EXPECT_EQ(XMLP_ret::XML_ERROR, XMLParser::loadXML("regressions/22843_profile_bin.xml", root));
     EXPECT_EQ(XMLP_ret::XML_ERROR, XMLParser::loadXML("regressions/22844_profile_bin.xml", root));
+    EXPECT_EQ(XMLP_ret::XML_ERROR, XMLParser::loadXML("regressions/23030_profile_bin.xml", root));
     Log::Flush();
 }