[gentoo-user] How to disable stack randomization?

Shaochun Wang · External Since: May 23, 2006 Posts: 36

Every time I execute the same program, its stack starts at a different
address. After some studying, I know it is caused by stack randomization
in kernel. Although stack randomization impedes stack buffer overflow,
it introduces some nondeterminism.

Does anyone know how to disable it?
Thank you in advance.

--
Shaochun Wang <scwang.DeleteThis@ios.ac.cn>

Jabber: fungusw.DeleteThis@jabber.org
--
gentoo-user.DeleteThis@gentoo.org mailing list

Ryan Sims · External Since: Jun 30, 2006 Posts: 43

On 8/3/07, Shaochun Wang <scwang DeleteThis @ios.ac.cn> wrote:
> Every time I execute the same program, its stack starts at a different
> address. After some studying, I know it is caused by stack randomization
> in kernel. Although stack randomization impedes stack buffer overflow,
> it introduces some nondeterminism.
>
> Does anyone know how to disable it?

I'm afraid I can't help, but I'm curious: what are the behaviors that
the randomization is causing? Not criticizing, just interested.

--
Ryan W Sims
--
gentoo-user DeleteThis @gentoo.org mailing list

Norberto Bensa · External Since: Jul 04, 2007 Posts: 6

Shaochun Wang wrote:
>
> Does anyone know how to disable it?

norandmaps?

--
gentoo-user.TakeThisOut@gentoo.org mailing list

Shaochun Wang · External Since: May 23, 2006 Posts: 36

I got the way:

sysctl -w kernel.randomize_va_space=0

Disabling stack randomization is usefull for learning.

--
Shaochun Wang <scwang.RemoveThis@ios.ac.cn>

Jabber: fungusw.RemoveThis@jabber.org
--
gentoo-user.RemoveThis@gentoo.org mailing list