From: mfburdett at gmail dot com
Operating system: FreeBSD 6.2
PHP version: 5.2.1
PHP Bug Type: PCRE related
Bug description: preg_match_all with a particular regexp causes run-away
php/apache process
Description:
------------
preg_match_all with a particular regexp causes a run-away Apache/PHP
processes which consumes all available CPU. This is on amd64
architecture; FreeBSD 6.2; PCRE 7.0 and PHP 5.2.1 installed through
FreeBSD ports.
Reproduce code:
---------------
$regexp = '%(?:^|,\ *)("(?>[^"]*)(?>""[^"]* )*"|(?: [^",]*))%x';
preg_match_all($regexp, $string, $matches);
Expected result:
----------------
It should compile and execute.
Actual result:
--------------
Process consumes all available CPU until killed.
--
Edit bug report at http://bugs.php.net/?id=40630&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=40630&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=40630&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=40630&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=40630&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=40630&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=40630&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=40630&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=40630&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=40630&r=support
Expected behavior: http://bugs.php.net/fix.php?id=40630&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=40630&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=40630&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=40630&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40630&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=40630&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=40630&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=40630&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=40630&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=40630&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=40630&r=mysqlcfg
