#43495 [NEW]: array_merge_recursive crash with recursive arrays

From: nicholsr@php.net Operating system: any PHP version: 5.2.5 PHP Bug Type: Reproducible crash Bug description: array_merge_recursive crash with recursive arrays Description: ------------ This is basically the same as bug 42752 but in the array_merge_recursive rather than the array_walk recursive code. The fix is the same. The detection of recursion used in array_merge_recursive is incorrect so it is possible to pass recursive arrays that cause unbounded recursion, leading to stack overflow. Reproduce code: --------------- <?php $a=array("key1"=>array("key2"=>array())); $a["key1"]["key2"]["key3"]=&$a; $b=array("key1"=>array("key2"=>array())); $b["key1"]["key2"]["key3"]=&$b; array_merge_recursive ($a,$b); echo "reached the end \n"; ?> Expected result: ---------------- reached the end Actual result: -------------- crash -- Edit bug report at http://bugs.php.net/?id=43495&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=43495&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=43495&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=43495&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=43495&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=43495&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=43495&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=43495&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=43495&r=needscript Try newer version: http://bugs.php.net/fix.php?id=43495&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=43495&r=support Expected behavior: http://bugs.php.net/fix.php?id=43495&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=43495&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=43495&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=43495&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=43495&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=43495&r=dst IIS Stability: http://bugs.php.net/fix.php?id=43495&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=43495&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=43495&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=43495&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=43495&r=mysqlcfg