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Message-ID: <20110629194339.GA15379@openwall.com>
Date: Wed, 29 Jun 2011 23:43:39 +0400
From: Solar Designer <solar@...nwall.com>
To: kernel-hardening@...ts.openwall.com
Subject: Re: overview of PaX features
Vasiliy,
On Wed, Jun 29, 2011 at 10:37:28PM +0400, Vasiliy Kulikov wrote:
> That's not only about old apps, but also a default relaxed policy for
> the toolchain:
>
> http://www.gentoo.org/proj/en/hardened/gnu-stack.xml
Of course. In my experience, most programs that currently get
executable stack actually don't need it.
And for gcc trampolines we can include the emulation code in the kernel.
> For upstream linux the default policy is if no GNU_STACK present, the
> stack flags is defined by a constant. I think it makes sense for
> the upsteam to change it to per pid namespace, with the same default.
Sounds good. Then we'll have less code to maintain in our patch.
Thanks,
Alexander
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