Bug #60423 [NEW]: Segmentation fault with the UTF-8 check regexp in some cases

From: Operating system: Linux PHP version: 5.3.8 Package: PCRE related Bug Type: Bug Bug description:Segmentation fault with the UTF-8 check regexp in some cases Description: ------------ I'm using the regexp to test whether a string is a valid UTF-8 encoded string. But in some cases it causes a segmentation fault. Examples of strings that cause the error: http://samally.ru/php_pcre_segmentation_fault/test1.txt http://samally.ru/php_pcre_segmentation_fault/test2.txt Test script: --------------- $string = file_get_contents('http://samally.ru/php_pcre_segmentation_fault/test1.txt'); // $string = file_get_contents('http://samally.ru/php_pcre_segmentation_fault/test2.txt'); // Tests whether a string is a valid UTF-8 encoded string. // @link http://w3.org/International/questions/qa-forms-utf-8.html $r = preg_match('~^(?: [\x09\x0A\x0D\x20-\x7E] # ASCII without control characters | [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16 )*$~DSXx', $string); -- Edit bug report at https://bugs.php.net/bug.php?id=60423&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=60423&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=60423&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=60423&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=60423&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=60423&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=60423&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=60423&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=60423&r=needscript Try newer version: https://bugs.php.net/fix.php?id=60423&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=60423&r=support Expected behavior: https://bugs.php.net/fix.php?id=60423&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=60423&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=60423&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=60423&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=60423&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=60423&r=dst IIS Stability: https://bugs.php.net/fix.php?id=60423&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=60423&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=60423&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=60423&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=60423&r=mysqlcfg