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Message-ID: <1512785925.26342.4.camel@perches.com>
Subject: Re: [PATCH] doc: convert printk-formats.txt to rst
From: Joe Perches <joe@perches.com>
To: "Tobin C. Harding" <me@tobin.cc>, Dan Carpenter <error27@gmail.com>,
        Laura Abbott <labbott@redhat.com>
Cc: Kees Cook <keescook@chromium.org>, Jonathan Corbet <corbet@lwn.net>,
        Randy Dunlap <rdunlap@infradead.org>,
        Andrew Murray <amurray@mpc-data.co.uk>, linux-doc@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>
Date: Fri, 08 Dec 2017 18:18:45 -0800
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On Sat, 2017-12-09 at 12:27 +1100, Tobin C. Harding wrote:
> On Fri, Dec 08, 2017 at 01:22:37PM -0800, Joe Perches wrote:

> > Outside of the documentation, what could be useful is for
> > someone to add a tool to verify %p<foo> extension to
> > the typeof address actually passed as an argument.
> 
> This sounds interesting to work no. At first glance I have no idea how
> one would go about this. Some form of static analysis would be a good
> place to start, right? I'd like to allocate some cycles to this, any
> pointers most appreciated.

A gcc-plugin would likely work best.

There was some discussion about such a thing here:
http://www.openwall.com/lists/kernel-hardening/2017/02/14/38

I vaguely recall someone else doing a broader use tool
which I believe was not smatch, but my google-fu isn't
finding it.

It might have been coccinelle based.