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Bug #50162 Memory leak when fetching timestamp column from Oracle database
Submitted: 2009-11-13 04:33 UTC Modified: 2009-12-06 18:55 UTC
From: shigeru_kitazaki at cybozu dot co dot jp Assigned: felipe
Status: Closed Package: ODBC related
PHP Version: 5.3.0 OS: Linux
Private report: No CVE-ID:
 [2009-11-13 04:33 UTC] shigeru_kitazaki at cybozu dot co dot jp
Description:
------------
PHP (debug build) detects memory leaks on this environment.
 - Linux Cent OS 5.3 (64bit)
 - unixODBC-2.2.15pre
 - Oracle instantclient 11.1

This occurs only when fetching Oracle "TIMESTANP" column on Linux.

Reproduce code:
---------------
<?php
$dsn  = "VALID_DATA_SOURCE_NAME";
$user = "VALID_USER_NAME";
$pass = "VALID_PASSWORD";
$conn = odbc_connect($dsn, $user, $pass);

// sample table has this schema and has more than one row(s).
//     CREATE TABLE TEST (COLUMN1 TIMESTAMP)
$ret = odbc_exec($conn, "SELECT COLUMN1 FROM TEST");

// Here detects leaking memory!! And, data seems normal state.
$data = odbc_result($ret, 1);
var_dump($data);

odbc_close($conn);

Actual result:
--------------
string(26) "2009-11-13 00:00:00.000000"
[Fri Nov 13 13:06:27 2009]  Script:  '/home/cybozu/oracle_timestamp.php'
---------------------------------------
/home/cybozu/tmp/php/ext/odbc/php_odbc.c(429) : Block 0x04ae49a8 status:
Beginning:      OK (allocated on /home/cybozu/tmp/php/ext/odbc/php_odbc.c:984, 27 bytes)
    Start:      OK
      End:      Overflown (magic=0x00000030 instead of 0x6C71D1A1)
                3 byte(s) overflown
---------------------------------------
[Fri Nov 13 13:06:27 2009]  Script:  '/home/cybozu/oracle_timestamp.php'
/home/cybozu/tmp/php/ext/odbc/php_odbc.c(984) :  Freeing 0x04AE49A8 (27 bytes), script=/home/cybozu/oracle_timestamp.php
=== Total 1 memory leaks detected ===

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2009-12-06 18:53 UTC] svn@php.net
Automatic comment from SVN on behalf of felipe
Revision: http://svn.php.net/viewvc/?view=revision&revision=291772
Log: - Fixed bug #50162 (Memory leak when fetching timestamp column from Oracle database)
- Fixed bug #34852 (Failure in odbc_exec() using oracle-supplied odbc driver) (patch by tim dot tassonis at trivadis dot com)
 [2009-12-06 18:55 UTC] felipe@php.net
This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.

This is an Oracle odbc driver issue, look:
http://www.tech-archive.net/Archive/Data/microsoft.public.data.odbc/2006-08/msg00033.html

However I added a workaround for this issue.

 
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