#35731 [Opn->Fbk]: global _super global_

From: Date: Mon, 19 Dec 2005 09:15:18 +0000
Subject: #35731 [Opn->Fbk]: global _super global_
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-90648@lists.php.net to get a copy of this message 
 ID:               35731
 Updated by:       tony2001@php.net
 Reported By:      khad at landak dot com
-Status:           Open
+Status:           Feedback
-Bug Type:         Scripting Engine problem
+Bug Type:         Session related
 Operating System: Linux 2.6
 PHP Version:      5.1.1
 New Comment:

Please try using this CVS snapshot:

  http://snaps.php.net/php5.1-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5.1-win32-latest.zip

Can't reproduce.


Previous Comments:
------------------------------------------------------------------------

[2005-12-19 10:08:28] khad at landak dot com

Description:
------------
using global on super global causing segfault or memory corruption.

I have large codes which written in nasty way ;)
see Reproduce code

it works under php 4 and pre 5.1

please helpp

Reproduce code:
---------------
<?
session_start();

$_SESSION["sss"]=1000;
$sessvar = "_SESSION";

function abc()
{
        global ${$GLOBALS["sessvar"]};
        $biji = ${$GLOBALS["sessvar"]};

        print $biji["sss"];
}

abc();

Expected result:
----------------
no segfault 

Actual result:
--------------
1000*** glibc detected *** double free or corruption (fasttop):
0x083f4748 ***
Aborted

or segfault

#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7c15ef1 in raise () from /lib/tls/libc.so.6
#2  0xb7c1783b in abort () from /lib/tls/libc.so.6
#3  0xb7c4bff5 in __fsetlocking () from /lib/tls/libc.so.6
#4  0xb7c52587 in malloc_usable_size () from /lib/tls/libc.so.6
#5  0xb7c52a02 in free () from /lib/tls/libc.so.6
#6  0x081ed9a0 in shutdown_memory_manager (silent=0, full_shutdown=0)
at /BUILD/src/php-5.1.1/Zend/zend_alloc.c:512
#7  0x081ccb98 in php_request_shutdown (dummy=0x0) at
/BUILD/src/php-5.1.1/main/main.c:1287
#8  0x08289a81 in main (argc=2, argv=0xbfa77fb4) at
/BUILD/src/php-5.1.1/sapi/cli/php_cli.c:1142



------------------------------------------------------------------------


-- 
Edit this bug report at http://bugs.php.net/?id=35731&edit=1

Thread (3 messages)

« previous php.bugs (#90648) next »