Bug #70064 [Asn->Ana]: imagescale(..., IMG_BICUBIC) leaks memory

From: Date: Mon, 13 Jul 2015 16:25:41 +0000
Subject: Bug #70064 [Asn->Ana]: imagescale(..., IMG_BICUBIC) leaks memory
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=70064&edit=1

 ID:                 70064
 Updated by:         cmb@php.net
 Reported by:        cmb@php.net
 Summary:            imagescale(..., IMG_BICUBIC) leaks memory
-Status:             Assigned
+Status:             Analyzed
 Type:               Bug
 Package:            GD related
 Operating System:   *
 PHP Version:        7.0Git-2015-07-13 (Git)
 Assigned To:        cmb
 Block user comment: N
 Private report:     N

 New Comment:

Well, actually the test script should have been:

    <?php
    $im = imagecreatetruecolor(256, 256);
    imagedestroy(imagescale($im, 32, 32, IMG_BICUBIC));
    imagedestroy($im);
    ?>

but that doesn't change the result. The problem is that a
temporary image is freed with gdFree() instead of
gdImageDestroy(). I've already reported that upstream[1].

[1] <https://github.com/libgd/libgd/issues/173>


Previous Comments:
------------------------------------------------------------------------
[2015-07-13 13:14:07] cmb@php.net

Description:
------------
Apparently, imagescale(..., IMG_BICUBIC) leaks memory.


Test script:
---------------
<?php
$im = imagecreatetruecolor(256, 256);
imagescale($im, 32, 32, IMG_BICUBIC);
imagedestroy($im);
?>


Expected result:
----------------
 

Actual result:
--------------
[Mon Jul 13 15:11:26 2015]  Script:  '/home/cmb/test.php'
/home/cmb/php-src/ext/gd/libgd/gd.c(202) :  Freeing 0x7FC6B1657680 (32 bytes), s
cript=/home/cmb/test.php
/home/cmb/php-src/Zend/zend_alloc.c(2266) : Actual location (location was relaye
d)
Last leak repeated 255 times
[Mon Jul 13 15:11:26 2015]  Script:  '/home/cmb/test.php'
/home/cmb/php-src/ext/gd/libgd/gd.c(193) :  Freeing 0x7FC6B165AE00 (2048 bytes),
 script=/home/cmb/test.php
[Mon Jul 13 15:11:26 2015]  Script:  '/home/cmb/test.php'
/home/cmb/php-src/ext/gd/libgd/gd.c(194) :  Freeing 0x7FC6B165B800 (2048 bytes),
 script=/home/cmb/test.php
[Mon Jul 13 15:11:26 2015]  Script:  '/home/cmb/test.php'
/home/cmb/php-src/ext/gd/libgd/gd.c(201) :  Freeing 0x7FC6B1680000 (128 bytes),
script=/home/cmb/test.php
/home/cmb/php-src/Zend/zend_alloc.c(2266) : Actual location (location was relaye
d)
Last leak repeated 255 times
=== Total 514 memory leaks detected ===


------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=70064&edit=1

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