#40630 [NEW]: preg_match_all with a particular regexp causes run-away php/apache process

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