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dsmcc: Prevent a potential SEGV by reading beyond end of buffer
Add a test to Dsmcc::ProcessSection to detect if the section length field is greater than the actual buffer length. This prevents the CRC calculation from reading beyond the buffer and causing a SEGV. Signed-off-by: Lawrence Rust <email@example.com> Signed-off-by: Stuart Morgan <firstname.lastname@example.org>
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