From: shm
Operating system:
PHP version: trunk-SVN-2011-11-19 (SVN)
Package: BC math related
Bug Type: Bug
Bug description:bcscale related problem on 64bits platforms
Description:
------------
bcscale uses long typed variable to store scale passed further to bclib
calls. Unfortunately bclib uses int type for scale parameter, thus large
long numbers (which uses 8 bytes on 64 bits platforms) could be casted to
negative number and cause memory corruption as a result of pointer
arithmetic with scale param.
Test script:
---------------
<?php
$var48 = bcscale(634314234334311);
$var67 = bcsqrt(false);
$var414 = bcadd(false,null,10);
die('ALIVE');
?>
Expected result:
----------------
ALIVE
Actual result:
--------------
$ php
<?php
$var48 = bcscale(634314234334311);
$var67 = bcsqrt(false);
$var414 = bcadd(false,null,10);
die('ALIVE');
?>^D
Segmentation fault: 11 (core dumped)
--
Edit bug report at https://bugs.php.net/bug.php?id=60337&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=60337&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=60337&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=60337&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=60337&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=60337&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=60337&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=60337&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=60337&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=60337&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=60337&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=60337&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=60337&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=60337&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=60337&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=60337&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=60337&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=60337&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=60337&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=60337&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=60337&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=60337&r=mysqlcfg
