From:
Operating system: CentOs
PHP version: 5.3.6
Package: Reproducible crash
Bug Type: Bug
Bug description:PHP crashes when passing large object to string functions
Description:
------------
PHP crashes when passing large object ( with __toString() method ) to
string functions (like substr(), urlencode() etc.)
Test script:
---------------
<?php
class Foo
{
protected $obj;
function rec($i = 0, $obj)
{
$this -> obj = $obj;
// >5603 - segmentation fault or zend_mm_heap corrupted
// With some values can work as expected
if ( $i < 15604) {
$this -> rec(++$i, $this);
}
}
function __toString()
{
$this -> rec(0, $this);
return "Hello, world!";
}
}
$foo = new Foo();
substr($foo, 0, 5);
// This is ok
//echo "\nHello!\n";
// But if we begin using variables "zend_mm_heap corrupted" or
"Segmentation Fault"
$a = "aaaaa\n";
echo $a;
?>
Expected result:
----------------
Expecting correct appication exit
Actual result:
--------------
"Segmentation Fault" or "zend_mm_heap corrupted" errors
--
Edit bug report at http://bugs.php.net/bug.php?id=54465&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=54465&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=54465&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=54465&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=54465&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=54465&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=54465&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=54465&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=54465&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=54465&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=54465&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=54465&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=54465&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=54465&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=54465&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=54465&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=54465&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=54465&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=54465&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=54465&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=54465&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=54465&r=mysqlcfg
