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MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
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Too many cursors (more than 1024) could lead to memory corruption. This affects both, stored routines and C API cursors, and the threshold is per-server, not per-connection. Similarly, the corruption could happen when the server was under heavy load (executing more than 1024 simultaneous complex queries), and this is the reason why this bug is fixed in 4.1, which doesn't support cursors. The corruption was caused by a bug in the temporary tables code, when an attempt to create a table could lead to a write beyond allocated space. Note, that only internal tables were affected (the tables created internally by the server to resolve the query), not tables created with CREATE TEMPORARY TABLE. Another pre-condition for the bug is TRUE value of --temp-pool startup option, which, however, is a default. The cause of a bug was that random memory was overwritten in bitmap_set_next() due to out-of-bound memory access. mysys/my_bitmap.c: Local 'bitmap_size' is measured in bytes, no need to multiply it by 8. sql/sql_select.cc: Clear the temp_pool_slot bit only if we have set it previously. |
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| extra | ||
| heap | ||
| include | ||
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| isam | ||
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| install-sh | ||
| ltconfig | ||
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| Makefile.am | ||
| missing | ||
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| README | ||
This is a release of MySQL, a dual-license SQL database server. MySQL is brought to you by the MySQL team at MySQL AB. License information can be found in these files: - For GPL (free) distributions, see the COPYING file. - For commercial distributions, see the MySQLEULA.txt file. For further information about MySQL or additional documentation, see: - The latest information about MySQL: http://www.mysql.com - The current MySQL documentation: http://dev.mysql.com/doc Some manual sections of special interest: - If you are migrating from an older version of MySQL, please read the "Upgrading from..." section first! - To see what MySQL can do, take a look at the features section. - For installation instructions, see the Installation chapter. - For future plans, see the TODO appendix. - For the new features/bugfix history, see the News appendix. - For the currently known bugs/misfeatures (known errors) see the problems appendix. - For a list of developers and other contributors, see the Credits appendix. A local copy of the MySQL Reference Manual can be found in the Docs directory in GNU Info format. You can also browse the manual online or download it in any of several formats at the URL given earlier in this file. ************************************************************ IMPORTANT: Bug or error reports should be sent to http://bugs.mysql.com.