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Date: Mon, 08 Feb 2010 17:45:02 +0200
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Subject: Crash when sending SIGHUP to the Apache parent process when IMagick
 is loaded
From: jess@zend.com (Jess Portnoy)

Hello all,

I have IMagick 2.2.2 [latest stable in PECL] loaded with PHP 5.3.1. When 
sending SIGHUP, Apache defuncts, the BT is as follows:
(gdb) bt
#0  0x00007f069935b384 in __lll_lock_wait () from /lib/libpthread.so.0
#1  0x00007f0699356bf0 in _L_lock_102 () from /lib/libpthread.so.0
#2  0x00007f06993564fe in pthread_mutex_lock () from /lib/libpthread.so.0
#3  0x00007f06903df7b3 in LockSemaphoreInfo (semaphore_info=0xfa9130) at 
magick/semaphore.c:373
#4  0x00007f06903a5160 in DestroyModuleList () at magick/module.c:135
#5  0x00007f06903a1d79 in DestroyMagickList () at magick/magick.c:140
#6  0x00007f06903a1dff in MagickCoreTerminus () at magick/magick.c:1238
#7  0x00007f069037caf7 in DefaultFatalErrorHandler 
(magick_unused_severity=<value optimized out>,
    reason=0xfa9430 "unable to initialize module loader `Inappropriate 
ioctl for device'",
    description=0x0) at magick/exception.c:305
#8  0x00007f069037d0c6 in CatchException (exception=0x7fff61e2ff80) at 
magick/exception.c:218
#9  0x00007f06903a46c0 in GetModuleInfo (tag=<value optimized out>, 
exception=0xfa8de0)
    at magick/module.c:793
#10 0x00007f06903a1232 in GetMagickInfo (name=0x0, exception=0xfa8de0) 
at magick/magick.c:800
#11 0x00007f06903a14d0 in MagickCoreGenesis (path=0x0, 
establish_signal_handlers=MagickFalse)
    at magick/magick.c:1201
#12 0x00007f06905a9736 in MagickWandGenesis () at wand/magick-wand.c:987
#13 0x00007f069072bf56 in zm_startup_imagick () from 
/usr/local/zend/lib/php_extensions/imagick.so
#14 0x00007f069322f8ec in zend_startup_module_ex (module=0x12b0310)
    at /php-5.3.1/Zend/zend_API.c:1613
#15 0x00007f0693238475 in zend_hash_apply (ht=0x7f0693734ce0,
    apply_func=0x7f069322f800 <zend_startup_module_ex>) at 
/php-5.3.1/Zend/zend_hash.c:673
#16 0x00007f06932322fa in zend_startup_modules () at 
/php-5.3.1/Zend/zend_API.c:1662
#17 0x00007f06931dcce4 in php_module_startup (sf=<value optimized out>,
    additional_modules=0x7f06936fc4a0, num_additional_modules=1) at 
/php-5.3.1/main/main.c:2018
#18 0x00007f06932b2c45 in php_apache2_startup (sapi_module=0xfa9130)
    at /php-5.3.1/sapi/apache2handler/sapi_apache2.c:328
#19 0x00007f06932b36e6 in php_apache_server_startup (pconf=0xae6168, 
plog=<value optimized out>,
    ptemp=<value optimized out>, s=0xaec968) at 
/php-5.3.1/sapi/apache2handler/sapi_apache2.c:437
#20 0x0000000000438cf4 in ap_run_post_config ()
#21 0x0000000000425bbc in main ()

It appears to me as though IMagick's MSHUTDOWN fails to do proper 
cleanup and thus, the crash occurs in the next startup but this does not 
occur with PHP 5_2 [tested 5.2.12] or PHP 5.3.0 and is also resolved in 
5.3.2RC1 which is good.
Can anyone refer me to the revision that solves this issue? I am asking 
because I would very much like to backport it to 5.3.1.

Thanks in advance,

-- 
May the source be with you,
Best regards,
Jess Portnoy