From: giovanni at giacobbi dot net
Operating system: linux
PHP version: 4.4.4
PHP Bug Type: Reproducible crash
Bug description: double free problem after 64k iterations
Description:
------------
The following code snippet produces a double free error. I don't think my
glibc/linux versions matter, anyway I can provide them on request.
An interesting thing is that the bug manifests itself only at the 65536th
iteration. Removing any reference to the $index variable doesn't reproduce
the bug any longer.
Reproduce code:
---------------
function m($index) {
is_int($index);
global $x;
return $x[$index];
}
$i = 0;
$x = array("x");
while (m($i)) {
$p[] = m($i);
}
Actual result:
--------------
*** glibc detected *** php: double free or corruption (fasttop):
0x09d89a08 ***
--
Edit bug report at http://bugs.php.net/?id=40181&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=40181&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=40181&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=40181&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=40181&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=40181&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=40181&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=40181&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=40181&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=40181&r=support
Expected behavior: http://bugs.php.net/fix.php?id=40181&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=40181&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=40181&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=40181&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40181&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=40181&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=40181&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=40181&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=40181&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=40181&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=40181&r=mysqlcfg
