#28875 [Opn->Fbk]: Wrong regex crashes server

ID: 28875 Updated by: sniper@php.net Reported By: amoljak at cox dot net -Status: Open +Status: Feedback -Bug Type: Reproducible crash +Bug Type: PCRE related Operating System: Windows 2000 Server PHP Version: 4.3.8-dev New Comment: What's the difference in the 3rd server to the 2 others..? And are you aware that PCRE has certain limitations what it can handle and what not? Previous Comments: ------------------------------------------------------------------------ [2004-06-22 18:06:38] amoljak at cox dot net Ok.. It crashes on two servers And on the third machine it gives the following warning: Warning: Compilation failed: internal error: code overflow at offset 72 in C:\work\servers\Apache2\htdocs\test\PHP\crashtest.php on line 7 (line 7 is the preg_match thing) But it does not crash. The php.ini options are the same. Thanks, Amol ------------------------------------------------------------------------ [2004-06-22 01:24:34] amoljak at cox dot net I tried PHP 4.3.8-dev and it is not crashing. So I am closing the bug. I will reopen if it occures on the machine I initially tried. Thanks ------------------------------------------------------------------------ [2004-06-22 00:45:31] iliaa@php.net Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip ------------------------------------------------------------------------ [2004-06-21 22:58:29] amoljak at cox dot net Description: ------------ Note the extra ] in the regex. Try to load this page three times and it will crash the third time. Reproduce code: --------------- <?php $filecontent = "my name is amol"; $regex = "/(^|[^a-zA-Z0-9-])([Nn]on[-s? []]]degrees? [Ss]tudents?)([^a-zA-Z0-9-]|$)/es"; //preg_match_all($regex, $filecontent , $matches, PREG_OFFSET_CAPTURE); preg_match($regex, $filecontent , $matches, PREG_OFFSET_CAPTURE); print "matches = $matches<br>"; ?> Expected result: ---------------- This is from end user's code and I don't know what he expected. But he was able to crash the server... thats bad. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=28875&edit=1