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From: Tavis Ormandy <taviso@google.com>
Date: Mon, 21 Nov 2016 07:34:49 -0800
Message-ID: <CAJ_zFkL3D5dzn+h1ydNg9rF11wrsyCv6uhp5=VNH82d4E5ewUA@mail.gmail.com>
Subject: Re: Formal description of system call interface
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Cyril Hrubis <chrubis@suse.cz>, linux-api@vger.kernel.org,
        LKML <linux-kernel@vger.kernel.org>,
        Michael Kerrisk-manpages <mtk.manpages@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Sasha Levin <levinsasha928@gmail.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>, scientist@fb.com,
        Steven Rostedt <rostedt@goodmis.org>, Arnd Bergmann <arnd@arndb.de>,
        carlos@redhat.com, syzkaller <syzkaller@googlegroups.com>,
        Kostya Serebryany <kcc@google.com>, Mike Frysinger <vapier@google.com>,
        Dave Jones <davej@codemonkey.org.uk>
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On Mon, Nov 21, 2016 at 7:14 AM, Dmitry Vyukov <dvyukov@google.com> wrote:
>
>
> Re more complex side effects. I always feared that a description suitable
> for automatic verification (i.e. zero false positives, otherwise it is useless)
> may be too difficult to achieve.
>
> Cyril, Tavis, can you come up with some set of predicates that can be
> checked automatically yet still useful?
> We can start small, e.g. "must not alter virtual address space".

Yes, I've been working on creating something like this, I have a
simple working prototype. I cant promise it has zero false positives
right now, but I think that is achievable.

Let me dig it up (I had put it on the back burner).

Tavis.