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Date: Thu, 5 Nov 2015 12:59:21 -0800
From: Kees Cook <keescook@...omium.org>
To: "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
Cc: Solar Designer <solar@...nwall.com>, Greg KH <gregkh@...uxfoundation.org>,
Ben Hutchings <ben@...adent.org.uk>, Ard Biesheuvel <ard.biesheuvel@...aro.org>,
James Morris <jmorris@...ei.org>
Subject: Kernel Self Protection Project
I'm organizing a community of people to work on the various kernel
self-protection technologies (most of which are found in PaX and
Grsecurity). I'm building on the presentation I gave at Kernel Summit
where I sought to convince the other upstream Linux kernel developers
that security is more than fixing bugs, and that we need to bring in
proactive defenses:
http://lwn.net/Articles/662219/
This is especially highlighted by the Washington Post article today:
http://www.washingtonpost.com/sf/business/2015/11/05/net-of-insecurity-the-kernel-of-the-argument/
Between the companies that recognize the critical nature of this work,
and with Linux Foundation's Core Infrastructure Initiative happy to
start funding specific work in this area, I think we can really make a
dent.
Let's start the work. I've built some wiki pages around my slides,
where we can take notes, list examples, and coordinate:
http://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project
For now, I'm going to focus on taking a look at the PAX_SIZE_OVERFLOW
gcc plugin, which will also get us the gcc plugin infrastructure.
Other people, please speak up on what you'd like to tackle.
I recommend PAX_REFCOUNT, PAX_USERCOPY, and GRKERNSEC_KSTACKOVERFLOW
for some non-plugin stuff to look at.
Once we've got plugins, then we should look at PAX_MEMORY_STACKLEAK
and PAX_CONSTIFY_PLUGIN.
If you're feeling like disrupting people who depend on debugging, do
GRKERNSEC_HIDESYM.
If you're feeling especially bold, start on PAX_KERNEXEC and follow it
up with PAX_MEMORY_UDEREF.
Of course, there's plenty of other things, and tons I haven't listed
in the wiki -- please add them and bring them up for discussion here.
-Kees
--
Kees Cook
Chrome OS Security
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