Fatal libpng error in sysmap.php

[mediomondo]

Hi,
i recently upgraded my Zabbix server from 4.2.x 7o 4.4.6 on Ubuntu Server 18.04 following this procedure:

https://www.zabbix.com/documentation/current/manual/installation/upgrade/packages/debian_ubuntu

Now, every time i try to edit a map (or create e new empty one) i have this warning displayed at the bottom of the screen:

########
imagecreatefromstring(): gd-png: fatal libpng error: IDAT: invalid distance too far back
[sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): gd-png error: setjmp returns error condition 3
[sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): Passed data is not in 'PNG' format [sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): Couldn't create GD Image Stream out of Data [sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagesx() expects parameter 1 to be resource, boolean given [sysmap.php:288 → imagesx() in sysmap.php:288]
imagesy() expects parameter 1 to be resource, boolean given [sysmap.php:289 → imagesy() in sysmap.php:289]
imagecreatefromstring(): gd-png: fatal libpng error: IDAT: invalid distance too far back
[sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): gd-png error: setjmp returns error condition 3
[sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): Passed data is not in 'PNG' format [sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): Couldn't create GD Image Stream out of Data [sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagesx() expects parameter 1 to be resource, boolean given [sysmap.php:288 → imagesx() in sysmap.php:288]
imagesy() expects parameter 1 to be resource, boolean given [sysmap.php:289 → imagesy() in sysmap.php:289]
imagecreatefromstring(): gd-png: fatal libpng error: IDAT: invalid distance too far back
[sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): gd-png error: setjmp returns error condition 3
[sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): Passed data is not in 'PNG' format [sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): Couldn't create GD Image Stream out of Data [sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagesx() expects parameter 1 to be resource, boolean given [sysmap.php:288 → imagesx() in sysmap.php:288]
imagesy() expects parameter 1 to be resource, boolean given [sysmap.php:289 → imagesy() in sysmap.php:289]
imagecreatefromstring(): gd-png: fatal libpng error: IDAT: invalid distance too far back
[sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): gd-png error: setjmp returns error condition 3
[sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): Passed data is not in 'PNG' format [sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagecreatefromstring(): Couldn't create GD Image Stream out of Data [sysmap.php:283 → imagecreatefromstring() in sysmap.php:283]
imagesx() expects parameter 1 to be resource, boolean given [sysmap.php:288 → imagesx() in sysmap.php:288]
imagesy() expects parameter 1 to be resource, boolean given [sysmap.php:289 → imagesy() in sysmap.php:289]
#######

Could someone help me to figure out what happens?

Thank you.

[tim.mooney]

Does Ubuntu 18.04 include at least version 2.0.28 of php-gd?

The 4.4 Installation requirements mention that 2.0.28 is required, and that's a change from the minimum version that older versions of Zabbix required.

[mediomondo]

Hi Tim,
i think yes but how can be sure? I use php7.2 with module php7.2-gd enabled:

root@zabbix:/etc/php/7.2/mods-available# apt-cache show php7.2-gd | grep Version
Version: 7.2.24-0ubuntu0.18.04.3
Version: 7.2.3-1ubuntu1

I checked if module was loaded:

root@zabbix:/etc/php/7.2/mods-available# php7.2 -m | grep -i gd
gd

Do you think it is the right version?

[mediomondo]

I put a phpinfo.php inside Apache root to display some more information and here is the GD section:

GD Support	enabled
GD headers Version	2.2.5
GD library Version	2.2.5
FreeType Support	enabled
FreeType Linkage	with freetype
FreeType Version	2.8.1
GIF Read Support	enabled
GIF Create Support	enabled
JPEG Support	enabled
libJPEG Version	8
PNG Support	enabled
libPNG Version	1.6.34
WBMP Support	enabled
XPM Support	enabled
libXpm Version	30411
XBM Support	enabled
WebP Support	enabled

I think that alla requirements are satisfied.

[tim.mooney]

That certainly seems new enough.

Not sure what else to have you check. I'm more familiar with RPM-based systems. Is there an easy way with "apt" to verify a package or set of packages, to make sure all the files are installed correctly, not corrupted, etc?

[mediomondo]

Hi Tim,
i verified with the command "debsums" for inconsistent packages but i've found that's all ok.