#32508 [Opn->Fbk]: ob_gzhandler w/ chunking can crash Apache 2

ID: 32508 Updated by: sniper@php.net Reported By: myronwu at gmail dot com -Status: Open +Status: Feedback Bug Type: Output Control Operating System: Linux 2.4 PHP Version: 5.0.3 New Comment: Does it only happen when you have phpinfo() in there? (I'd put something else between there..) Also, try doing ./configure --help sometimes. You have several options used that don't even exist. Like --enable-track-vars, --with-apache2.. Previous Comments: ------------------------------------------------------------------------ [2005-03-31 02:15:34] myronwu at gmail dot com Reconfirmed the bug using the reproduce code on CVS snapshot php5-STABLE-200503302230, configure command: './configure' '--with-mysqli=/usr/local/mysql/bin/mysql_config' '--with-mysql=/usr/local/mysql' '--with-apache2=/usr/src/apache/httpd-2.0.53' '--enable-yp' '--enable-track-vars' '--with-zlib' '--with-jpeg' '--with-png' '--with-tiff' '--with-pdflib' '--with-gd' '--with-apxs2=/var/www/bin/apxs' '--with-gettext' '--with-pspell' Otherwise same setup as reported above. ------------------------------------------------------------------------ [2005-03-30 22:44:12] tony2001@php.net Please try using this CVS snapshot: http://snaps.php.net/php5-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.0-win32-latest.zip ------------------------------------------------------------------------ [2005-03-30 22:38:41] myronwu at gmail dot com Description: ------------ In certain browsers, attempting to output data before a call to ob_start('ob_gzhandler', chunk_size) causes Apache 2 to consume huge (all) amounts of memory. This only occurs when chunking takes place (ie size of data output > chunk_size). Outputting data before a call to ob_start without a chunk_size or without 'ob_gzhandler' works as expected. Browsers tested that were affected: Firefox, Opera Browsers tested that were unaffected: Links Diff between php.ini and php.ini-dist: register_globals = On Apache version: Apache/2.0.53 (Unix) mod_ssl/2.0.53 OpenSSL/0.9.7a PHP/ 5.0.3 using prefork mpm. Zlib version: 1.1.4 PHP configure command: './configure' '--with-mysqli=/usr/local/mysql/bin/ mysql_config' '--with-mysql=/usr/local/mysql' '--with- apache2=/usr/src/apache/httpd-2.0.53' '--enable-yp' '-- enable-track-vars' '--with-zlib' '--with-jpeg' '--with- png' '--with-tiff' '--with-pdflib' '--with-gd' '--with- apxs2=/var/www/bin/apxs' '--with-gettext' '--with- pspell' This was also reproduced on another box with the same versions of Apache 2, zlib, but PHP 4.3.1 with configure command: './configure' '--with-mysql=/usr/local/mysql' '--with- apache2=/usr/src/httpd-2.0.46' '--enable-yp' '--enable- track-vars' '--with-zlib-dir=/usr/local/lib' '--with- jpeg-dir=/usr/local/lib' '--with-png-dir=/usr/local/lib' '--with-tiff-dir=/usr/local/lib' '--with-pdflib' '-- with-gd=yes' '--with-apxs2=/var/www/bin/apxs' Reproduce code: --------------- <?php echo 'test!'; ob_start('ob_gzhandler', 2048); phpinfo(); ob_end_flush(); ?> Expected result: ---------------- test! (phpinfo() output) Actual result: -------------- Nothing. The browser doesn't receive any information to display and httpd begins to consume all available memory. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=32508&edit=1