Bug #61411 [NEW]: PDO Segfaults with PERSISTENT == TRUE && EMULATE_PREPARES == FALSE

From: Date: Fri, 16 Mar 2012 09:16:27 +0000
Subject: Bug #61411 [NEW]: PDO Segfaults with PERSISTENT == TRUE && EMULATE_PREPARES == FALSE
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-168533@lists.php.net to get a copy of this message 
From:             
Operating system: Linux 2.6.32-5-amd64
PHP version:      5.4.0
Package:          PDO related
Bug Type:         Bug
Bug description:PDO Segfaults with PERSISTENT == TRUE && EMULATE_PREPARES == FALSE

Description:
------------
PDO Segfaults or hangs when a statement is executed with both
ATTR_PERSISTENT => 
TRUE and ATTR_EMULATE_PREPARES => FALSE

The exact bug is actually :
*** glibc detected *** /usr/local/php-5.4.0/bin/php: free(): invalid
pointer: 
0x00007ff976ee84c8 ***
But from my tests yesterday I have seen a segfault and a double free, that
I 
can't reproduce today, only the invalid pointer.

Playing with PERSISTENT and EMULATE_PREPARE with the given test script give
:

| ATTR_PERSISENT | ATTR_EMULATE_PREPARES |                  WORKS |
|          FALSE |                 FALSE |                    YES |
|          FALSE |                  TRUE |                    YES |
|           TRUE |                 FALSE | free() invalid pointer |
|           TRUE |                  TRUE |                    YES |

Configure command : 

./configure'  '--enable-fpm' '--prefix=/usr/local/php-5.4.0'
'--enable-mbstring' 
'--enable-gd-native-ttf' '--enable-zip' '--with-mcrypt'
'--with-openssl'
'--
with-gd' '--with-jpeg-dir=/usr/lib' '--with-freetype-dir'
'--with-curl'
'--with-
pcre-regex' '--with-gettext' '--without-sqlite'
'--without-sqlite3'
'--with-pdo-
mysql=mysqlnd' '--disable-rpath' '--disable-debug'
'--disable-fileinfo'
'--
without-pdo-sqlite' '--disable-phar' '--disable-posix'
'--disable-tokenizer' '--
disable-xmlreader' '--disable-xmlwriter' '--without-pear'

Same bug reproduced in php 5.3.8 and php 5.3.10

Test script:
---------------
<?php

$options = array(PDO::ATTR_PERSISTENT => TRUE,
                 PDO::ATTR_EMULATE_PREPARES => FALSE); 

$pdo = new PDO('mysql:host=sql;dbname=??;charset=utf8',
               '??', '??', $options);

$statement = $pdo->prepare("SELECT count(*) from a_table");
$statement->execute();
foreach ($statement as $line)
    var_dump($line);


Expected result:
----------------
I expect PHP not to segfault

Actual result:
--------------
*** glibc detected *** /usr/local/php-5.4.0/bin/php: free(): invalid
pointer: 
0x00007ff976ee84c8 ***


-- 
Edit bug report at https://bugs.php.net/bug.php?id=61411&edit=1
-- 
Try a snapshot (PHP 5.4):            https://bugs.php.net/fix.php?id=61411&r=trysnapshot54
Try a snapshot (PHP 5.3):            https://bugs.php.net/fix.php?id=61411&r=trysnapshot53
Try a snapshot (trunk):              https://bugs.php.net/fix.php?id=61411&r=trysnapshottrunk
Fixed in SVN:                        https://bugs.php.net/fix.php?id=61411&r=fixed
Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61411&r=needdocs
Fixed in release:                    https://bugs.php.net/fix.php?id=61411&r=alreadyfixed
Need backtrace:                      https://bugs.php.net/fix.php?id=61411&r=needtrace
Need Reproduce Script:               https://bugs.php.net/fix.php?id=61411&r=needscript
Try newer version:                   https://bugs.php.net/fix.php?id=61411&r=oldversion
Not developer issue:                 https://bugs.php.net/fix.php?id=61411&r=support
Expected behavior:                   https://bugs.php.net/fix.php?id=61411&r=notwrong
Not enough info:                     https://bugs.php.net/fix.php?id=61411&r=notenoughinfo
Submitted twice:                     https://bugs.php.net/fix.php?id=61411&r=submittedtwice
register_globals:                    https://bugs.php.net/fix.php?id=61411&r=globals
PHP 4 support discontinued:          https://bugs.php.net/fix.php?id=61411&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=61411&r=dst
IIS Stability:                       https://bugs.php.net/fix.php?id=61411&r=isapi
Install GNU Sed:                     https://bugs.php.net/fix.php?id=61411&r=gnused
Floating point limitations:          https://bugs.php.net/fix.php?id=61411&r=float
No Zend Extensions:                  https://bugs.php.net/fix.php?id=61411&r=nozend
MySQL Configuration Error:           https://bugs.php.net/fix.php?id=61411&r=mysqlcfg

Thread (21 messages)

« previous php.bugs (#168533) next »