Bug #55199 [NEW]: Some combination of subject and pattern results in "Segmentation fault"

From: Operating system: Linux 2.6.26-2 x86_64 PHP version: 5.3.6 Package: PCRE related Bug Type: Bug Bug description:Some combination of subject and pattern results in "Segmentation fault" Description: ------------ Using a special combination of subject and pattern results in a segmention fault error (or web server not sending any data to client). The problem was first caused in a Zend framework environment (Zend_Filter_StripTags, line 298) but as far as I isolated the responsible code, it crashes even php. Test script: --------------- $pattern = '~(</?)(\w*)((/(?!>)|[^/>])*)(/?>)~'; $subject = ' <P class=MsoNormal 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<br>'; echo 'start.'; preg_match($pattern, $subject); echo 'end.'; Expected result: ---------------- start.end. Actual result: -------------- start.Segmentation fault -- Edit bug report at https://bugs.php.net/bug.php?id=55199&edit=1 -- Try a snapshot (PHP 5.2): https://bugs.php.net/fix.php?id=55199&r=trysnapshot52 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=55199&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=55199&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=55199&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=55199&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=55199&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=55199&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=55199&r=needscript Try newer version: https://bugs.php.net/fix.php?id=55199&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=55199&r=support Expected behavior: https://bugs.php.net/fix.php?id=55199&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=55199&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=55199&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=55199&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=55199&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=55199&r=dst IIS Stability: https://bugs.php.net/fix.php?id=55199&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=55199&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=55199&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=55199&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=55199&r=mysqlcfg Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=55199&r=trysnapshot54