Debian Bug report logs - #568349
php5-imagick: Segmentation fault when calling Imagick::writeImage() on a read-only file

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Nick Vahalik <nvahalik@rvos.com>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: php5-imagick: Segmentation fault when calling Imagick::writeImage() on a read-only file

Date: Wed, 03 Feb 2010 19:21:33 -0900

Package: php5-imagick
Version: 2.1.1RC1-1
Severity: important

Take this for example:

nvahalik@intranet:~$ ls -al file.jpg 
-r--r--r-- 1 nvahalik nvahalik 67580 2010-02-03 12:50 file.jpg

<?php
$a = new Imagick('file.jpg');
$a->thumbnailImage(100, 0);
$a->writeImage();

nvahalik@intranet:~# php test.php
Segmentation fault
nvahaliK@intranet:~# 

If the file gets made writable, the command completes as expected.

Only appears to affect the currenct arch.  An i386 version of the script
runs as expected.

-- System Information:
Debian Release: 5.0.4
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-2-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages php5-imagick depends on:
ii  libapache2-mod- 5.2.6.dfsg.1-2+nosuho    server-side, HTML-embedded scripti
ii  libc6           2.7-18lenny2             GNU C Library: Shared libraries
ii  libmagick10     7:6.3.7.9.dfsg2-1~lenny3 image manipulation library
ii  php5-cli [phpap 5.2.6.dfsg.1-2+nosuho    command-line interpreter for the p
ii  php5-common     5.2.6.dfsg.1-2+nosuho    Common files for packages built fr
ii  ucf             3.0016                   Update Configuration File: preserv

php5-imagick recommends no packages.

php5-imagick suggests no packages.

-- no debconf information

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Message #10 received at 568349@bugs.debian.org (full text, mbox, reply):

From: Guillaume Delacour <gui@iroqwa.org>

To: 568349@bugs.debian.org

Subject: Re: php5-imagick: Segmentation fault when calling Imagick::writeImage() on a read-only file

Date: Tue, 14 Sep 2010 23:15:24 +0200

[Message part 1 (text/plain, inline)]

Hello,

After some gdb usage and some investigations, i've found that the
problem seems to be in imagemagick when openmp support is enabled at
build time :

http://studio.imagemagick.org/discourse-server/viewtopic.php?f=3&t=14788
http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=16453&start=0&hilit=openmp+run+time

Rebuilding the imagemagick package without openmp support fix the
problem (see attachment).

I also noted that when the segfault appear, the image was successfully
written and was not corrupted.

[rules_imagemagick_disable_openmp (text/x-patch, attachment)]

[signature.asc (application/pgp-signature, inline)]

Message #15 received at 568349@bugs.debian.org (full text, mbox, reply):

From: Franz Unger <ufx@vivid-planet.com>

To: 568349@bugs.debian.org

Subject: Workaround

Date: Wed, 24 Nov 2010 15:28:12 +0100

We ran into the same problem with current squeeze/sid. Even with 
writable files. Installing imagick from pecl didn't help either.

As a workaround we added this line into /etc/environment:
MAGICK_THREAD_LIMIT=1

We'd appreciate if the above patch could make it into the stable release.

Message #20 received at 568349@bugs.debian.org (full text, mbox, reply):

From: Guillaume Delacour <gui@iroqwa.org>

To: 568349@bugs.debian.org, control@bugs.debian.org

Cc: Debian PHP Maintainers <pkg-php-maint@lists.alioth.debian.org>, ufx@vivid-planet.com, nvahalik@rvos.com

Subject: Re: Workaround

Date: Mon, 13 Dec 2010 22:34:15 +0100

[Message part 1 (text/plain, inline)]

tags 568349 +help
thanks

Hi,

I've made some more test today and didn't reproduce the problem at any
time. Sometimes with MAGICK_THREAD_LIMIT set, the crash occured too (see
url i paste earlier in the bug). I think this is mainly a openmp
behavior issue.

I request some help to the Debian PHP Maintainers team (or any other
person who wants to involve on the bug) to determine how to fix this
bug.

[signature.asc (application/pgp-signature, inline)]

Message #27 received at 568349@bugs.debian.org (full text, mbox, reply):

From: Guillaume Delacour <gui@iroqwa.org>

To: 638409@bugs.debian.org, control@bugs.debian.org

Cc: 568349@bugs.debian.org

Subject: The openmp support also segfault php5-imagick

Date: Wed, 09 Nov 2011 21:06:36 +0100

[Message part 1 (text/plain, inline)]

affects 638409 +php5-imagick
thanks

Hello,

The openmp support also affects imagemagick php module by segfaulting
the module in specific conditions [1].
After disabling the openmp support in imagemagick, the segfault seems to
never occurs again.

As the problem affects Wheezy too, maybe could you consider disabling
openmp support ?

[1]: http://bugs.debian.org/568349

-- 
Guillaume Delacour <gui@iroqwa.org>

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Message #32 received at 568349@bugs.debian.org (full text, mbox, reply):

From: roucaries bastien <roucaries.bastien+debian@gmail.com>

To: Guillaume Delacour <gui@iroqwa.org>, 638409@bugs.debian.org

Cc: control@bugs.debian.org, 568349@bugs.debian.org

Subject: Re: [Pkg-gmagick-im-team] Bug#638409: The openmp support also segfault php5-imagick

Date: Thu, 10 Nov 2011 10:23:26 +0100

2011/11/9 Guillaume Delacour <gui@iroqwa.org>:
> affects 638409 +php5-imagick
> thanks
>
> Hello,
>
> The openmp support also affects imagemagick php module by segfaulting
> the module in specific conditions [1].

Ok see a libgomp problem . Why do you report it against imagemagick ?

> After disabling the openmp support in imagemagick, the segfault seems to
> never occurs again.
>
> As the problem affects Wheezy too, maybe could you consider disabling
> openmp support ?

No thanks. This bug is broader than imagemagick, please fix libgomp
and reassign to libgomp with proper gdb trace. And add affect
imagemagick.



Thanks

Bastien

> [1]: http://bugs.debian.org/568349
>
> --
> Guillaume Delacour <gui@iroqwa.org>
>
> _______________________________________________
> Pkg-gmagick-im-team mailing list
> Pkg-gmagick-im-team@lists.alioth.debian.org
> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-gmagick-im-team
>

Message #37 received at 568349@bugs.debian.org (full text, mbox, reply):

From: Guillaume Delacour <gui@iroqwa.org>

To: roucaries bastien <roucaries.bastien+debian@gmail.com>, control@bugs.debian.org

Cc: 638409@bugs.debian.org, 568349@bugs.debian.org

Subject: Re: Bug#638409: The openmp support also segfault php5-imagick

Date: Fri, 11 Nov 2011 18:29:09 +0100

[Message part 1 (text/plain, inline)]

affects 638409 -php5-imagick
thanks

Le jeudi 10 novembre 2011 à 10:23 +0100, roucaries bastien a écrit :
> 2011/11/9 Guillaume Delacour <gui@iroqwa.org>:
> > affects 638409 +php5-imagick
> > thanks
> >
> > Hello,
> >
> > The openmp support also affects imagemagick php module by segfaulting
> > the module in specific conditions [1].
> 
> Ok see a libgomp problem . Why do you report it against imagemagick ?

All backtrace i've collected didn't help me ATM. I saw other users using
other distribution have noted that the openmp support is problematic in
such ways. This is why i've proposed to disable this support.

> 
> > After disabling the openmp support in imagemagick, the segfault seems to
> > never occurs again.
> >
> > As the problem affects Wheezy too, maybe could you consider disabling
> > openmp support ?
> 
> No thanks. This bug is broader than imagemagick, please fix libgomp
> and reassign to libgomp with proper gdb trace. And add affect
> imagemagick.

I've deleted the "affects php5-imagick" on this bug. If i confirm an
issue with libgomp, i'll bug against it.

> 
> 
> 
> Thanks
> 
> Bastien
> 
> > [1]: http://bugs.debian.org/568349
> >
> > --
> > Guillaume Delacour <gui@iroqwa.org>
> >
> > _______________________________________________
> > Pkg-gmagick-im-team mailing list
> > Pkg-gmagick-im-team@lists.alioth.debian.org
> > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-gmagick-im-team
> >

-- 
Guillaume Delacour <gui@iroqwa.org>

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Message #48 received at 568349-done@bugs.debian.org (full text, mbox, reply):

From: Bastien ROUCARIES <roucaries.bastien@gmail.com>

To: 652960-done@bugs.debian.org, 568349-done@bugs.debian.org

Subject: Fixed by upgrade

Date: Thu, 12 Jul 2012 10:07:19 +0200

Hi,

I have upgraded my package (first message was too fast) and it seems
that upgrade solve this problem. Feel free to reopen if it is does not
work on your side

Bastien

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