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Date: Wed, 2 Apr 2014 16:21:31 +0100
Message-ID: <CAEKnhAE29LbS4X7hsjix=o3Kd4rWBHGjFXCwzego6d-i09Fqtg@mail.gmail.com>
To: Kajetan Dolinar <kajetan@jesej.si>
Cc: Internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=047d7b163827d7713604f610d64c
Subject: Re: Re: [PHP-DEV] Fwd: zend_std_get_method : Address 0xffffffff is
 not stack'd, malloc'd or (recently) free'd
From: bukka@php.net (Jakub Zelenka)

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On Wed, Apr 2, 2014 at 8:42 AM, Kajetan Dolinar <kajetan@jesej.si> wrote:

> Hi Johannes, Stas
>
> Please find the code with the explanation of how to reproduce the fault
> on the following link: https://github.com/kdolinar/hypx-zend-bugcase
>
> The main Zend PHP extension logic for the classes is in src/hypx.c.
> Much obliged for your opinion. Thanks.
>
> Kajetan
>
>  ==== Some more info ====
>
> On my machine, uname -a says
>
> Linux machine 3.4.6-2.10-desktop #1 SMP PREEMPT Wed Sep 25 08:50:55 CEST
> 2013 i686 i686 i386 GNU/Linux
>
> cat /etc/os-release says
>
> NAME=openSUSE
> VERSION="12.2 (Mantis)"
> VERSION_ID="12.2"
> PRETTY_NAME="openSUSE 12.2 (Mantis) (i586)"
> ID=opensuse
> ANSI_COLOR="0;32"
> CPE_NAME="cpe:/o:opensuse:opensuse:12.2"
>
> phpize says
>
> PHP Api Version: 20090626
> Zend Module Api No: 20090626
> Zend Extension Api No: 220090626
>
> and php --version says
>
> PHP 5.3.15 (cli)
> Copyright (c) 1997-2012 The PHP Group
> Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies
>
> Please come back to me if you need anything more ...
>
>
> --
> PHP Internals - PHP Runtime Development Mailing List
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>
>
Hi,

fixed: https://gist.github.com/bukka/9936176

The main problem was that you are trying to save return_value to static
variable and then re-use it (
https://github.com/kdolinar/hypx-zend-bugcase/blob/master/src/hypx.c#L302 )

That won't work because of GC (value can be freed in the meantime). There
were also some memory leaks and missing TSRMLS that I fixed. Compare the
the gist file and you will see that. I fixed just this case so the
index.php works. However there might be more similar case that you need to
check...

Jakub

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