[15315] Fix null dereference on eprosima::fastrtps::xmlparser::XMLParser::parseXMLBitsetDynamicType

[MiguelCompany]

Description

Fixes oss-fuzz issue 47122

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added.
• N/A Any new/modified methods have been properly documented using Doxygen.
• Fast DDS test suite has been run locally.
• Changes are ABI compatible.
• Changes are API compatible.
• N/A Documentation builds and tests pass locally.
• N/A New feature has been added to the versions.md file (if applicable).
• N/A New feature has been documented/Current behavior is correctly described in the documentation.

Reviewer Checklist

• Check contributor checklist is correct.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.

[JLBuenoLopez]

LGTM

[MiguelCompany]

@Mergifyio backport 2.7.x 2.6.x

[mergify]

backport 2.7.x 2.6.x

✅ Backports have been created

• #3027 [15315] Fix null dereference on eprosima::fastrtps::xmlparser::XMLParser::parseXMLBitsetDynamicType (backport #2893) has been created for branch 2.7.x
• #3028 [15315] Fix null dereference on eprosima::fastrtps::xmlparser::XMLParser::parseXMLBitsetDynamicType (backport #2893) has been created for branch 2.6.x

[MiguelCompany]

@Mergifyio backport 2.3.x

[mergify]

backport 2.3.x

✅ Backports have been created

• #3030 [15315] Fix null dereference on eprosima::fastrtps::xmlparser::XMLParser::parseXMLBitsetDynamicType (backport #2893) has been created for branch 2.3.x