ID: 45224
Updated by: [EMAIL PROTECTED]
Reported By: dave at westphila dot net
-Status: Open
+Status: Bogus
Bug Type: Reproducible crash
Operating System: Linux, Fedora Core 8
PHP Version: 5.2.6
New Comment:
See Bug#33468, Bug#39387
Previous Comments:
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[2008-06-10 00:22:24] dave at westphila dot net
Description:
------------
I can reproduce a segfault in a preg_match call with a particular
regular expression and target text (which is a large html file). The
offending regEx and a very similar one which does not segfault are
included in the script I've attached.
Reproduce code:
---------------
<?php
$text = file_get_contents($argv[1]);
//$text = "A test
string....sdflsmdfs;ldfkgns;dklfjgnsdlkfjgns;df'adslfm,qr;ijgaldsfknvsdl,fbnwle;frnsdlkfjnsldkfjnvsdlkfjnbsldkfjnsldkfjgnsldkfjgnslkdfjgnsdffls
dflkgdf;lkgwndf;lkgnsdfkjngsfmn,sdfgsbndflkgjsbdflgkjsdbfglkjsdnfglksjdfnglksdjfnglsdkfjg";
$exp1 =
"/(<[^>^<]{1,20}>){0,1}(\s|<[^<^>]+>| )+L(<[^>^<]{1,20}>){0,1}imitation(\s|<[^<^>]+>| )+/";
$exp2 =
"/(<[^>^<]{1,20}>){0,1}(\s|<[^<^>]+>| )+L(<[^>^<]{1,20}>){0,1}imitation(\s|<[^<^>]+>| )+o/";
preg_match($exp1, $text);
echo "Passed Expression 1\n";
preg_match($exp2, $text);
echo "Passed Expression 2\n";
?>
Expected result:
----------------
The file may or may not match the regEx, out of memory maybe, but
certainly it shouldn't segfault.
Actual result:
--------------
The reg ex string in $exp1 runs ok. The expression in $exp2 is only
one character longer and produces a segfault when run on the file
publicly available here:
http://dev.xtractresearch.com/SD11212006CA.htm
A segfault does not happen when instead of this file a shorter string
of text is used (commented out in the script code). Length of the file
should not be an issue since the first regEx completes ok.
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