Fix crash on malformed packet received from MySQL - Port of #4742

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Fix crash on malformed packet received from MySQL - Port of #4742 #4743

Closed JavierJF closed 2 weeks ago

JavierJF commented 2 weeks ago

NOTE: This PR is a port of #4742.

This PR adds an integrity check for detecting malformed column-count packets when reading resultset metadata from MySQL. This check is a mitigation to prevents consistent crashes found due to certain malformed packets.