#48416 [NEW]: Memleak in ereg() and eregi() functions

From: bmorel at ssi dot fr Operating system: CentOS 5.3 PHP version: 5.2.9 PHP Bug Type: Regexps related Bug description: Memleak in ereg() and eregi() functions Description: ------------ When repeating an ereg() or eregi() on different patterns, the memory usage of httpd (or php if executed from the command-line) gets huge (about 1GB for the example below) for the time the script executes, then the memory is freed. During this time, the memory_get_usage() stays normal, and php's memory limit doesn't trigger. When repeating the ereg() with the same pattern each time, the memory usage stays normal; this happens only when repeating with a different pattern each time. Verified on CentOS with PHP 5.2.6 & 5.2.9 Verified on Windows XP with PHP 5.2.8 Reproduce code: --------------- <?php for ($i=0;$i<1000000;$i++) ereg("$i","test"); ?> Expected result: ---------------- Memory usage staying low. Actual result: -------------- Memory usage as shown by "top -d 1" gets huge. -- Edit bug report at http://bugs.php.net/?id=48416&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=48416&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=48416&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=48416&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=48416&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=48416&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=48416&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=48416&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=48416&r=needscript Try newer version: http://bugs.php.net/fix.php?id=48416&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=48416&r=support Expected behavior: http://bugs.php.net/fix.php?id=48416&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=48416&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=48416&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=48416&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=48416&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=48416&r=dst IIS Stability: http://bugs.php.net/fix.php?id=48416&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=48416&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=48416&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=48416&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=48416&r=mysqlcfg