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Key: CORE-1958
Type: Bug Bug
Status: Closed Closed
Resolution: Fixed
Priority: Major Major
Assignee: Dmitry Yemanov
Reporter: Dmitry Yemanov
Votes: 0
Watchers: 0

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Firebird Core

Bugcheck 179 (decompression overran buffer) when attempting to update the same record multiple times

Created: 24/Jun/08 06:00 AM   Updated: 19/Jan/16 04:57 AM
Component/s: Engine
Affects Version/s: 2.0.0, 1.5.4, 2.0.1, 2.0.2, 2.0.3, 1.5.5, 2.5 Initial, 2.1.0, 2.0.4, 2.5 Alpha 1, 2.1.1
Fix Version/s: 2.0.5, 2.1.2, 2.5 Beta 1

Environment: Any
Issue Links:

QA Status: No test

 Description  « Hide
Let's have some record stored in a longer format while the current format is shorter. If this record is updated multiple times within a single transaction and then a savepoint cleanup happens (e.g. due to some runtime error related to another data), then a bugcheck can happen. This seems to be caused by the lack of sync between actual record length on disk (new version will have a short format) and rec_length field of new_rpb->rpb_record which may keep the longer value (from some prior operations with another format).

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