linux-kernel - Re: [PATCH v6] kernel: add kcov code coverage

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Message-ID: <CACT4Y+a_Tvi643CUVey=1_i4R+vV=_ZSrsP92AMRjcEo1V-dKw@mail.gmail.com>
Date:	Mon, 25 Jan 2016 14:03:55 +0100
From:	Dmitry Vyukov <dvyukov@...gle.com>
To:	syzkaller <syzkaller@...glegroups.com>,
	Vegard Nossum <vegard.nossum@...cle.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Tavis Ormandy <taviso@...gle.com>,
	Will Deacon <will.deacon@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Quentin Casasnovas <quentin.casasnovas@...cle.com>,
	Kostya Serebryany <kcc@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Kees Cook <keescook@...gle.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Drysdale <drysdale@...gle.com>,
	linux-arm-kernel@...ts.infradead.org,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH v6] kernel: add kcov code coverage

On Mon, Jan 25, 2016 at 2:00 PM, Dmitry Vyukov <dvyukov@...gle.com> wrote:
> kcov provides code coverage collection for coverage-guided fuzzing
> (randomized testing). Coverage-guided fuzzing is a testing technique
> that uses coverage feedback to determine new interesting inputs to a
> system. A notable user-space example is AFL
> (http://lcamtuf.coredump.cx/afl/). However, this technique is not
> widely used for kernel testing due to missing compiler and kernel
> support.

Kirill, I export kcov file as 0600 now.

Any more comments?

Andrew, will you take this to mm? Or how does it happen?