Bug #39132 [Com]: integer overflow in memory_limit with memory >= 2GB.

From: Date: Mon, 25 Jan 2016 14:08:32 +0000
Subject: Bug #39132 [Com]: integer overflow in memory_limit with memory >= 2GB.
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-198879@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=39132&edit=1

 ID:                 39132
 Comment by:         mg at artigo dot pl
 Reported by:        php at vicaya dot com
 Summary:            integer overflow in memory_limit with memory >= 2GB.
 Status:             No Feedback
 Type:               Bug
 Package:            Unknown/Other Function
 Operating System:   Linux 64-bit
 PHP Version:        5.1.6
 Block user comment: N
 Private report:     N

 New Comment:

Same issue on 5.6.14 64 bit + Apache 64 bit + Windows 64 bit.
Can't set "4096M", getting:
PHP Fatal error:  Allowed memory size of 262144 bytes exhausted


Previous Comments:
------------------------------------------------------------------------
[2008-01-27 13:55:01] vadim at vadiaz dot com

same behavior on 5.2.5
setting memory_limit to 4096M result in almost any script produce following error:

Allowed memory size of 
262144 bytes exhausted

262144 == 0x40000

I put 4000000000 in php.ini and it looks like it work now
so parsing '4096M' does produce memory_limit 4Gb

------------------------------------------------------------------------
[2006-10-20 01:00:00] php-bugs at lists dot php dot net

No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".

------------------------------------------------------------------------
[2006-10-12 09:57:01] tony2001@php.net

Please try using this CVS snapshot:

  http://snaps.php.net/php5.2-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5.2-win32-latest.zip



------------------------------------------------------------------------
[2006-10-12 08:05:22] derick@php.net

Yes, it's using a size_t which AFAIK is limited to 32bit on most systems.

------------------------------------------------------------------------
[2006-10-12 03:17:37] php at vicaya dot com

Description:
------------
Looks like memory_limit is kept using a 32-bit signed integer even with php compiled on 64-bit
Linux.

Reproduce code:
---------------
set memory_limit to -1 or >= 2048M

<?= count(file("a_big_file")) ?>

Expected result:
----------------
number of lines in "a_big_file".

Actual result:
--------------
"Integer overflow in memory_limit check detected"


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



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