Bug #62049 [NEW]: A specific regex/input combo crashes PHP

From: Date: Wed, 16 May 2012 15:54:06 +0000
Subject: Bug #62049 [NEW]: A specific regex/input combo crashes PHP
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-170509@lists.php.net to get a copy of this message 
From:             
Operating system: Windows
PHP version:      5.4.3
Package:          PCRE related
Bug Type:         Bug
Bug description:A specific regex/input combo crashes PHP

Description:
------------
Test script crashes on web server (Apache 2.2.21) only with "empty
response" 
(324). Suspected to be a limit/overflow problem since it works if
"errorerror" is 
replaced with "error".

Test script:
---------------
<?php
echo preg_match( '/^<a(.)+class="(.)?actor-link(.)?"(.)+>Super
User<\/a>/',
'<a class="actor-link"
href="/errorerror.lv/lv/jomsocial/42-super-user/profile">Super User</a>
added 2 new photos in <a
href="/errorerror.lv/lv/jomsocial/42-super-user/photos/album?albumid=1">crap</a>
album' );
echo "\nFINISHED!";
?>

Expected result:
----------------
"1\nFINISHED"

Actual result:
--------------
HTTP error 324: empty response. Probably PHP crash. Apache didn't crash.

-- 
Edit bug report at https://bugs.php.net/bug.php?id=62049&edit=1
-- 
Try a snapshot (PHP 5.4):            https://bugs.php.net/fix.php?id=62049&r=trysnapshot54
Try a snapshot (PHP 5.3):            https://bugs.php.net/fix.php?id=62049&r=trysnapshot53
Try a snapshot (trunk):              https://bugs.php.net/fix.php?id=62049&r=trysnapshottrunk
Fixed in SVN:                        https://bugs.php.net/fix.php?id=62049&r=fixed
Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=62049&r=needdocs
Fixed in release:                    https://bugs.php.net/fix.php?id=62049&r=alreadyfixed
Need backtrace:                      https://bugs.php.net/fix.php?id=62049&r=needtrace
Need Reproduce Script:               https://bugs.php.net/fix.php?id=62049&r=needscript
Try newer version:                   https://bugs.php.net/fix.php?id=62049&r=oldversion
Not developer issue:                 https://bugs.php.net/fix.php?id=62049&r=support
Expected behavior:                   https://bugs.php.net/fix.php?id=62049&r=notwrong
Not enough info:                     https://bugs.php.net/fix.php?id=62049&r=notenoughinfo
Submitted twice:                     https://bugs.php.net/fix.php?id=62049&r=submittedtwice
register_globals:                    https://bugs.php.net/fix.php?id=62049&r=globals
PHP 4 support discontinued:          https://bugs.php.net/fix.php?id=62049&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=62049&r=dst
IIS Stability:                       https://bugs.php.net/fix.php?id=62049&r=isapi
Install GNU Sed:                     https://bugs.php.net/fix.php?id=62049&r=gnused
Floating point limitations:          https://bugs.php.net/fix.php?id=62049&r=float
No Zend Extensions:                  https://bugs.php.net/fix.php?id=62049&r=nozend
MySQL Configuration Error:           https://bugs.php.net/fix.php?id=62049&r=mysqlcfg

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