ID: 49501
Comment by: spender at grsecurity dot net
Reported By: romain dot riviere at gmail dot com
Status: Open
Bug Type: Scripting Engine problem
Operating System: Gentoo Linux 32bit / PaX
PHP Version: 5.*, 6
New Comment:
Due to VMA mirroring, the SEGMEXEC option causes accounted vm usage to
double. So you weren't experiencing a memory leak -- you were just
being accounted for twice as much memory as you thought you were using.
The solution would be to double the resource limit or, if your system is
NX-capable and PAE is enabled, use PAGEEXEC.
-Brad
Previous Comments:
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[2009-09-29 17:18:03] romain dot riviere at gmail dot com
Just a quick follow-up on this one.
I've finally traced it to PaX's SEGMEXEC feature.
I do not know yet if every PaX kernel should display that behaviour, or
if it's just VServer's GrSec patch, but disabling SEGMEXEC fixed it for
me.
I guess the bottomline here is : not PHP's fault
Cheers !
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[2009-09-12 13:51:39] romain dot riviere at gmail dot com
Unfortunately, same difference (Fatal error: Out of memory (allocated
9175040) (tried to allocate 1048577 bytes) in /home/smokey/test.php on
line 15).
I need to take some time and experiment a different kernel, with
different combinations of VServer/PaX/Grsecurity options, and see if it
helps.
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[2009-09-10 06:44:18] romain dot riviere at gmail dot com
I was able to reproduce the problem even with the latest sources. I am
beginning to suspect PaX/GrSecurity.
Are there any catches to be aware of when running PHP in that context ?
I know of the --with-pic/TEXTREL issue, but apparently there must be
something else to it.
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[2009-09-09 19:43:33] jani@php.net
And make sure you really do simply this:
1. Unpack sources
2. ./configure --disable-all --disable-cgi && make
3 run the test script with 'sapi/cli/php -n -d memory_limit=128M
yourscript.php
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[2009-09-09 19:42:25] jani@php.net
Please try using this snapshot:
http://snaps.php.net/php5.2-latest.tar.gz
For Windows:
http://windows.php.net/snapshots/
I can not reproduce this at all on several different servers running
latest svn checkout.
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