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

ID: 32508 Updated by: iliaa@php.net Reported By: myronwu at gmail dot com -Status: Verified +Status: Feedback Bug Type: Output Control Operating System: * PHP Version: 5CVS, 4CVS (2005-03-31) New Comment: Please try using this CVS snapshot: http://snaps.php.net/php5-latest.tar.gz For Windows: http://snaps.php.net/win32/php5-win32-latest.zip Previous Comments: ------------------------------------------------------------------------ [2005-03-31 21:15:16] sniper@php.net Also this was there: PHP Fatal error: Allowed memory size of 725463920 bytes exhausted at /usr/src/php/php5/main/output.c:229 ------------------------------------------------------------------------ [2005-03-31 21:12:50] sniper@php.net Nobody should try this at home. :) Definately eats all memory and eventually crashes. Here's what I got in error_log: PHP Fatal error: Allowed memory size of 1603177144 bytes exhausted at /usr/src/php/php5/ext/zlib/zlib.c:623 ------------------------------------------------------------------------ [2005-03-31 19:27:56] myronwu at gmail dot com Let me clarify some more, here's some more ob_start calls that you can substitute into the reproduce code given: These work OK: ob_start(); ob_start(null, 2048); ob_start(null, 1024); ob_start('ob_gzhandler'); These don't work: ob_start('ob_gzhandler', 1024); ob_start('ob_gzhandler', 2048); ob_start('ob_gzhandler', 1); ------------------------------------------------------------------------ [2005-03-31 19:22:10] myronwu at gmail dot com Pretty convinced this occurs whenever chunking occurs, irrespective of what the chunk size is. Setting it to something silly like 1 also has the same problem, for example. I also confirmed again the same behaviour on a Mac OS X (10.3.8) machine, with its default php 4.3.10 setup over Apache 1.3.33, zlib 1.1.4. Configure command is just what's default on os x, but if you don't have an os x machine handy, it's: '/SourceCache/apache_mod_php/apache_mod_php-17.5/php/ configure' '--prefix=/usr' '--mandir=/usr/share/man' '-- infodir=/usr/share/info' '--with-apxs' '--with-ldap=/ usr' '--with-kerberos=/usr' '--enable-cli' '--with-zlib- dir=/usr' '--enable-trans-sid' '--with-xml' '--enable- exif' '--enable-ftp' '--enable-mbstring' '--enable- mbregex' '--enable-dbx' '--enable-sockets' '--with- iodbc=/usr' '--with-curl=/usr' '--with-config-file- path=/etc' '--sysconfdir=/private/etc' The php.ini is untouched from defaults. ------------------------------------------------------------------------ [2005-03-31 09:34:17] sniper@php.net You can always make the chunk size smaller than 2048? Or doesn't this problem occur then? ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/32508 -- Edit this bug report at http://bugs.php.net/?id=32508&edit=1