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Date: Sat, 7 Nov 2015 22:42:35 +0100
From: Emese Revfy <re.emese@...il.com>
To: Josh Triplett <josh@...htriplett.org>
Cc: Kees Cook <keescook@...omium.org>, "kernel-hardening@...ts.openwall.com"
<kernel-hardening@...ts.openwall.com>, PaX Team <pageexec@...email.hu>,
Brad Spengler <spender@...ecurity.net>, Greg KH
<gregkh@...uxfoundation.org>, Theodore Tso <tytso@...gle.com>
Subject: Re: Proposal for kernel self protection features
On Fri, 6 Nov 2015 16:25:08 -0800
Josh Triplett <josh@...htriplett.org> wrote:
> On Fri, Nov 06, 2015 at 03:30:39PM -0800, Kees Cook wrote:
> > On Fri, Nov 6, 2015 at 2:55 PM, Emese Revfy <re.emese@...il.com> wrote:
> > > * initify: This plugin isn't security related either.
> > > It moves string constants (__func__ and function string arguments
> > > marked by the nocapture attribute) only referenced in
> > > __init/__exit functions to __initconst/__exitconst sections.
> > > It reduces memory usage (many kB), I think it may be important for
> > > embedded systems.
> >
> > I bet the Tinification project ( https://tiny.wiki.kernel.org/ ) would
> > be interested in this! (CCing Josh for thoughts.)
>
> I'd be quite interested.
>
> Could the plugin operate in a mode where it emits warnings to add such
> annotations explicitly in the code, rather than just automatically
> moving the data?
I can do it, but as Ard said it also moves e.g., format strings and __func__
that is not possible to do with source code changes.
--
Emese
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