linux-kernel - Re: [PATCH] kasan: push back KASAN

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Message-ID: <CAKwvOd=XFVP78OjwQT0HzHyHF+ALA+V0ZLvuOB-8xKrrjSncUA@mail.gmail.com>
Date:   Thu, 18 Jul 2019 15:09:25 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Qian Cai <cai@....pw>, Vasily Gorbik <gor@...ux.ibm.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Kostya Serebryany <kcc@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Alexander Potapenko <glider@...gle.com>
Subject: Re: [PATCH] kasan: push back KASAN_STACK detection to clang-10

On Thu, Jul 18, 2019 at 9:23 AM Mark Brown <broonie@...nel.org> wrote:
>
> On Thu, Jul 18, 2019 at 07:18:28PM +0300, Andrey Ryabinin wrote:
> > On 7/18/19 5:14 PM, Arnd Bergmann wrote:
>
> > > asan-stack mode still uses dangerously large kernel stacks of
> > > tens of kilobytes in some drivers, and it does not seem that anyone
> > > is working on the clang bug.
>
> > > -   default !(CLANG_VERSION < 90000)
> > > +   default !(CLANG_VERSION < 100000)
>
> > Wouldn't be better to make this thing for any clang version? And only when the bug is
> > finally fixed, specify the clang version which can enable this safely.
>
> Especially if nobody is currently working on it.

I agree.
-- 
Thanks,
~Nick Desaulniers