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Message-ID: <CALCETrVDJDjdoh7yvOPd=_5twQnzQRhe8G2KLaRw-NnA1Uf__g@mail.gmail.com>
Date: Wed, 13 Jul 2016 15:01:28 -0700
From: Andy Lutomirski <luto@...capital.net>
To: Kees Cook <keescook@...omium.org>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Rik van Riel <riel@...hat.com>,
Casey Schaufler <casey@...aufler-ca.com>, PaX Team <pageexec@...email.hu>,
Brad Spengler <spender@...ecurity.net>, Russell King <linux@...linux.org.uk>,
Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>, Michael Ellerman <mpe@...erman.id.au>,
Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>,
"David S. Miller" <davem@...emloft.net>, X86 ML <x86@...nel.org>, Christoph Lameter <cl@...ux.com>,
Pekka Enberg <penberg@...nel.org>, David Rientjes <rientjes@...gle.com>,
Joonsoo Kim <iamjoonsoo.kim@....com>, Andrew Morton <akpm@...ux-foundation.org>,
Andy Lutomirski <luto@...nel.org>, Borislav Petkov <bp@...e.de>, Mathias Krause <minipli@...glemail.com>,
Jan Kara <jack@...e.cz>, Vitaly Wool <vitalywool@...il.com>,
Andrea Arcangeli <aarcange@...hat.com>, Dmitry Vyukov <dvyukov@...gle.com>,
Laura Abbott <labbott@...oraproject.org>,
"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
"linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>, linuxppc-dev@...ts.ozlabs.org,
sparclinux@...r.kernel.org, linux-arch <linux-arch@...r.kernel.org>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH v2 01/11] mm: Implement stack frame object validation
On Wed, Jul 13, 2016 at 2:55 PM, Kees Cook <keescook@...omium.org> wrote:
> This creates per-architecture function arch_within_stack_frames() that
> should validate if a given object is contained by a kernel stack frame.
> Initial implementation is on x86.
>
> This is based on code from PaX.
>
This, along with Josh's livepatch work, are two examples of unwinders
that matter for correctness instead of just debugging. ISTM this
should just use Josh's code directly once it's been written.
--Andy
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