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Server may crash or corrupt data if SELECT WITH LOCK is issued against records not in the latest format [CORE3374] #3740

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firebird-issue-importer opened this issue Mar 4, 2011 · 8 comments

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@firebird-issue-importer firebird-issue-importer commented Mar 4, 2011

Submitted by: @dyemanov

Is related to QA467

Test case:

create table test (col1 int, col2 varchar(10), col3 date);
insert into test values (1, 'qwerty', current_date);

alter table test drop col2;
select * from test order by col1 with lock; -- crash here

Prerequisites:

1) Sorting must be present (in order to set the re-fetch flag)
2) The on-disk record must be in the prior format which must be longer than the current one

In this case deallocated memory is accessed which may lead to either crashing (most probably) or record/index errors.

Commits: d68affa 40f27b5 7208ae1 0c2900c

====== Test Details ======

Actually there is NO crash in 2.5.0, checked SS/SC/CS, WI-V2.5.0.26074

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@firebird-issue-importer firebird-issue-importer commented Mar 4, 2011

Modified by: @dyemanov

assignee: Dmitry Yemanov [ dimitr ]

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@firebird-issue-importer firebird-issue-importer commented Mar 4, 2011

Modified by: @dyemanov

status: Open [ 1 ] => In Progress [ 3 ]

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@firebird-issue-importer firebird-issue-importer commented Mar 4, 2011

Modified by: @dyemanov

status: In Progress [ 3 ] => Open [ 1 ]

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@firebird-issue-importer firebird-issue-importer commented Mar 5, 2011

Modified by: @dyemanov

status: Open [ 1 ] => Resolved [ 5 ]

resolution: Fixed [ 1 ]

Fix Version: 2.5.1 [ 10333 ]

Fix Version: 3.0 Alpha 1 [ 10331 ]

Fix Version: 2.0.7 [ 10390 ]

Fix Version: 2.1.5 [ 10420 ]

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@firebird-issue-importer firebird-issue-importer commented Mar 27, 2014

Modified by: @pcisar

Link: This issue is related to QA467 [ QA467 ]

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@firebird-issue-importer firebird-issue-importer commented May 29, 2015

Modified by: @pavel-zotov

status: Resolved [ 5 ] => Resolved [ 5 ]

QA Status: Done successfully

Test Details: Actually there is NO crash in 2.5.0, checked SS/SC/CS, WI-V2.5.0.26074

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@firebird-issue-importer firebird-issue-importer commented Sep 25, 2015

Commented by: @pcisar

Test created.

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@firebird-issue-importer firebird-issue-importer commented Sep 25, 2015

Modified by: @pcisar

status: Resolved [ 5 ] => Closed [ 6 ]

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