From: gynvael at coldwind dot pl
Operating system: any
PHP version: 5.4.10
Package: Reproducible crash
Bug Type: Bug
Bug description:zend_std_compare_objects crash on recursion
Description:
------------
The standard PHP object compare handler (zend_std_compare_objects) together
with
the == operator (compare_function) have no limit on nesting levels nor any
anti-
recursion protection.
The array comparing function in compare_function does have this protection.
It
would be good to add it to the object standard compare handler as well.
Test script:
---------------
<?php
class Test { public $x = 5; }
$testobj1 = new Test;
$testobj2 = new Test;
$testobj1->x = $testobj1;
$testobj2->x = $testobj2;
$testobj1 == $testobj2; // Crash (stack exhaustion)
Expected result:
----------------
PHP Fatal error: Nesting level too deep - recursive dependency? in
test.php on
line 9
Actual result:
--------------
segmentation fault (core dumped)
--
Edit bug report at https://bugs.php.net/bug.php?id=63882&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=63882&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=63882&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=63882&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=63882&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=63882&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=63882&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=63882&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=63882&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=63882&r=support
Expected behavior: https://bugs.php.net/fix.php?id=63882&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=63882&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=63882&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=63882&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=63882&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=63882&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=63882&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=63882&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=63882&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=63882&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=63882&r=mysqlcfg
