Kristofer Pettersson 18b3eacbc6 Bug#38469 invalid memory read and/or crash with utf8 text field, stored procedure, uservar ...

A stored procedure involving substrings could crash the server on certain
platforms because of invalid memory reads.
          
During storing the new blob-field value, the cached value's address range
overlapped that of the new field value. This caused problems when the 
cached value storage was reallocated to provide access for a new 
characater set representation. The patch checks the address ranges, and if
they overlap, the new field value is copied to a new storage before it is
converted to the new character set.

2008-09-20 10:51:03 +02:00

64 KiB

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