ius-coredev team mailing list archive

[Andrew Garner <1397306@xxxxxxxxxxxxxxxxxx>]

The critical bug referenced here in bugs.mysql.com/75245 is caused by a
NULL dereference originating in new "ib_warn_row_too_big()" code in the
InnoDB storage engine (storage/innobase/handler/ha_innodb.cc).  This
manifests if a table is created that might exceed the maximum row length
if fully populated.  Details of the limitations in the InnoDB maximum
row size are detailed in this Percona blog post:

http://www.percona.com/blog/2011/04/07/innodb-row-size-limitation/

When innodb_strict_mode is enabled, the server refuses to allow such
tables to be created.  If a table is created with innodb_strict_mode =
off (the default), 5.5.41+ now sends the client a warning.  However
there are certain corner cases where there may not be a valid client
(i.e. during innodb recovery) and when the table is loaded InnoDB tries
to send warnings on a "NULL" user connection.  This causes a null
dereference and the server will segfault.

Attached is a patch for 5.5.41 to guard against this case and avoids the
crash noted in MySQL bug 75245.

** Patch added: "Fix for MySQL bug #75245"
   https://bugs.launchpad.net/ius/+bug/1397306/+attachment/4283601/+files/mysql_bug_75245_5541.patch

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https://bugs.launchpad.net/bugs/1397306

Title:
  UPDATE REQUEST: mysql55 5.5.41 is available upstream

Status in IUS Community Project:
  In Progress

Bug description:
  New Source from
  http://dev.mysql.com/downloads/mysql/5.5.html#downloads

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