linux-kernel - Re: [PATCH v6 0/9] KFENCE: A low-overhead sampling-based memory safety error detector

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Message-ID: <CANpmjNOx=6ZRUC-Gkx=RqX4EPtuLe=AMshGSMcnd6a3=2iNtkQ@mail.gmail.com>
Date:   Fri, 30 Oct 2020 11:56:53 +0100
From:   Marco Elver <elver@...gle.com>
To:     Jann Horn <jannh@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Potapenko <glider@...gle.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christoph Lameter <cl@...ux.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        David Rientjes <rientjes@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hillf Danton <hdanton@...a.com>,
        Ingo Molnar <mingo@...hat.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Jonathan Corbet <corbet@....net>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Jörn Engel <joern@...estorage.com>,
        Kees Cook <keescook@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Pekka Enberg <penberg@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        SeongJae Park <sjpark@...zon.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vlastimil Babka <vbabka@...e.cz>,
        Will Deacon <will@...nel.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux-MM <linux-mm@...ck.org>
Subject: Re: [PATCH v6 0/9] KFENCE: A low-overhead sampling-based memory
 safety error detector

On Fri, 30 Oct 2020 at 03:49, Jann Horn <jannh@...gle.com> wrote:
> On Thu, Oct 29, 2020 at 2:16 PM Marco Elver <elver@...gle.com> wrote:
> > This adds the Kernel Electric-Fence (KFENCE) infrastructure. KFENCE is a
> > low-overhead sampling-based memory safety error detector of heap
> > use-after-free, invalid-free, and out-of-bounds access errors.  This
> > series enables KFENCE for the x86 and arm64 architectures, and adds
> > KFENCE hooks to the SLAB and SLUB allocators.
>
> I think this is getting close to a good state, just a couple minor issues left.

Thanks for your comments. We'll address all of them for v7.

> Now that the magic "embed the memory pool in the BSS section" stuff is
> gone, this series looks fairly straightforward.

Good to hear. :-)

Thanks,
-- Marco