MySQL: crash with LONGBLOB and union or update with subquery (MySQL Bug#54461)

MySQL 5.0 before 5.0.92, 5.1 before 5.1.51, and 5.5 before 5.5.6 allows remote authenticated users to cause a denial of service server crash via a query that uses the 1 GREATEST or 2 LEAST function with a mixed list of numeric and LONGBLOB arguments, which is not properly handled when the...