Bug #66881 [Fbk->NoF]: Out of memory when spl_autoload_register() called after ini_set()

Edit report at https://bugs.php.net/bug.php?id=66881&edit=1 ID: 66881 Updated by: php-bugs@lists.php.net Reported by: keith at bronstrup dot com Summary: Out of memory when spl_autoload_register() called after ini_set() -Status: Feedback +Status: No Feedback Type: Bug Package: Reproducible crash Operating System: Linux PHP Version: 5.4.26 Private report: N New Comment: No feedback was provided. The bug is being suspended because we assume that you are no longer experiencing the problem. If this is not the case and you are able to provide the information that was requested earlier, please do so and change the status of the bug back to "Re-Opened". Thank you. Previous Comments: ------------------------------------------------------------------------ [2016-05-06 14:10:46] nikic@php.net I can't reproduce this issue, and it sounds rather unlikely in the first place. If you still experience this problem in a recent PHP version (PHP >= 5.6), please reopen the bug report. ------------------------------------------------------------------------ [2014-03-11 05:05:02] keith at bronstrup dot com The supplied test code would actually fail on line 6. The 15 extra lines in my example (error on line 21) are comments, which I removed before posting. Sorry about that. ------------------------------------------------------------------------ [2014-03-11 04:05:19] keith at bronstrup dot com This behavior seems to also occur when error_reporting() is called before spl_autoload_register(). ------------------------------------------------------------------------ [2014-03-11 03:59:08] keith at bronstrup dot com Description: ------------ When using ini_set() to override configuration settings and using spl_autoload_register() with an anonymous function, PHP attempts to allocate nearly 3GB or RAM, causing a fatal error with ini_set() is called before spl_autoload_register(). Works as expected if spl_autoload_register() is called first. I initially discovered this condition in PHP 5.4.21 and it appears to have persisted after upgrading to 5.4.26 (built with WHM 11.42.0 EasyApache). I have provided two test scripts, the first of which works as expected (outputs 'Success!'), while the second results in a fatal error resulting from the script attempting to allocate nearly 3GB of RAM. The only difference between these scripts (save for comments) is the order of the ini_set() and spl_autoload_register() functions. My php.ini is using recommended defaults (from php.ini comments) and my configure line is as follows: './configure' '--enable-bcmath' '--enable-calendar' '--enable-exif' '--enable-ftp' '--enable-gd-native-ttf' '--enable-intl' '--enable-libxml' '--enable-mbstring' '--enable-pdo=shared' '--enable-sockets' '--enable-wddx' '--enable-zip' '--prefix=/usr/local' '--with-apxs2=/usr/local/apache/bin/apxs' '--with-bz2' '--with-curl=/opt/curlssl/' '--with-curlwrappers' '--with-enchant=/usr' '--with-freetype-dir=/usr' '--with-gd' '--with-gettext' '--with-icu-dir=/usr' '--with-imap=/opt/php_with_imap_client/' '--with-imap-ssl=/usr' '--with-jpeg-dir=/usr' '--with-kerberos' '--with-libexpat-dir=/usr' '--with-libxml-dir=/opt/xml2/' '--with-mcrypt=/opt/libmcrypt/' '--with-mm=/opt/mm/' '--with-mysql=/usr' '--with-mysql-sock=/var/lib/mysql/mysql.sock' '--with-mysqli=/usr/bin/mysql_config' '--with-openssl=/usr' '--with-openssl-dir=/usr' '--with-pcre-regex=/opt/pcre' '--with-pdo-mysql=shared' '--with-pdo-sqlite=shared' '--with-png-dir=/usr' '--with-pspell' '--with-tidy=/opt/tidy/' '--with-xpm-di! r=/usr' '--with-xsl=/opt/xslt/' '--with-zlib' '--with-zlib-dir=/usr' Test script: --------------- <?php // This fails attempting to allocate nearly 3GM of RAM ini_set('display_errors', 1); spl_autoload_register(function ($class) { // Doesn't matter what's here, so I've left it empty. }); die('Success!'); ?> ----- <?php // This outputs 'Success!' spl_autoload_register(function ($class) { // Doesn't matter what's here, so I've left it empty. }); ini_set('display_errors', 1); die('Success!'); ?> Expected result: ---------------- As in the first test script: Success! Actual result: -------------- Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 3050313117 bytes) in /home/bronscon/public_html/keywordcms-oo/failure.php on line 21 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=66881&edit=1