From: php at hristov dot com
Operating system: Linux
PHP version: 6CVS-2007-07-11 (CVS)
PHP Bug Type: Scripting Engine problem
Bug description: Zend Engine 3.0.0 leaks
Description:
------------
Try the example with HEAD (5_2 seems immune)
The example exploits that sort() needs its parameter to be passed by
reference, which we don't do. zend_call_function() will bail out on this,
and return FAILURE when called from call_user_func_array().
The first instruction of zend_call_function() is
*fci->retval_ptr_ptr = NULL;
with this we lose the original pointer and leak when zend_call_function()
returns with FAILURE. In this case in call_user_func_array() new memory for
return_value is allocated, which later is destructed.
[23:55:29] [EMAIL PROTECTED]:~/dev/php6> ./php -r
'$a=array(4,3,2);call_user_func_array("sort", array($a));var_dump($a);'
array(3) {
[0]=>
int(4)
[1]=>
int(3)
[2]=>
int(2)
}
[Wed Jul 11 23:55:32 2007] Script: '-'
/home/andrey/dev/php6/Zend/zend_vm_execute.h(191) : Freeing 0x40D4C400
(16 bytes), script=-
=== Total 1 memory leaks detected ===
Reproduce code:
---------------
php -r '$a=array(4,3,2);call_user_func_array("sort",
array($a));var_dump($a);'
--
Edit bug report at http://bugs.php.net/?id=41970&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=41970&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=41970&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=41970&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=41970&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=41970&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=41970&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=41970&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=41970&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=41970&r=support
Expected behavior: http://bugs.php.net/fix.php?id=41970&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=41970&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=41970&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=41970&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=41970&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=41970&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=41970&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=41970&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=41970&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=41970&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=41970&r=mysqlcfg
