#42968 [NEW]: DOMXML functions can allocate more memory than memory_limit allows

From: quaker at barbara dot eu dot org Operating system: Linux 2.6.20, Ubuntu 7.04 PHP version: 5.2.4 PHP Bug Type: DOM XML related Bug description: DOMXML functions can allocate more memory than memory_limit allows Description: ------------ DOMXML functions can allocate more memory than memory_limit allows. Reproduce code: --------------- <?php print "Current memory limit: " . ini_get("memory_limit") . "\n"; $dom = new DOMDocument(); $responseElement = $dom->createElement('response'); $dom->appendChild($responseElement); /* Infinite loop */ while (1) { $dataElement = $dom->createElement('data'); $dataText = $dom->createTextNode('Example data'); $dataElement->appendChild($dataText); $responseElement->appendChild($dataElement); } /* Never executed, just for showing idea */ $xmlString = $dom->saveXML(); echo $xmlString; ?> Expected result: ---------------- Fatal error: Allowed memory size of 2097152 bytes exhausted (tried to allocate XXX bytes) in YYY on line ZZZ Actual result: -------------- Memory limit is not hit. Script memory usage grows, till out of memory received from OS. -- Edit bug report at http://bugs.php.net/?id=42968&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42968&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42968&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42968&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=42968&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=42968&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=42968&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=42968&r=needscript Try newer version: http://bugs.php.net/fix.php?id=42968&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=42968&r=support Expected behavior: http://bugs.php.net/fix.php?id=42968&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=42968&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=42968&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=42968&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42968&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=42968&r=dst IIS Stability: http://bugs.php.net/fix.php?id=42968&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=42968&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=42968&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=42968&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=42968&r=mysqlcfg