linux-kernel - Re: [PATCH v3 11/39] kasan: don't duplicate config dependencies

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Date:   Thu, 1 Oct 2020 23:54:27 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     Marco Elver <elver@...gle.com>
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Evgenii Stepanov <eugenis@...gle.com>,
        Elena Petrova <lenaptr@...gle.com>,
        Branislav Rankov <Branislav.Rankov@....com>,
        Kevin Brodsky <kevin.brodsky@....com>,
        Will Deacon <will.deacon@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 11/39] kasan: don't duplicate config dependencies

On Thu, Oct 1, 2020 at 7:39 PM <elver@...gle.com> wrote:
>
> On Fri, Sep 25, 2020 at 12:50AM +0200, Andrey Konovalov wrote:
> > Both KASAN_GENERIC and KASAN_SW_TAGS have common dependencies, move
> > those to KASAN.
> >
> > Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
> > Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
>
> Reviewed-by: Marco Elver <elver@...gle.com>
>
> But see comment below:
>
> > ---
> > Change-Id: I77e475802e8f1750b9154fe4a6e6da4456054fcd
> > ---
> >  lib/Kconfig.kasan | 11 +++--------
> >  1 file changed, 3 insertions(+), 8 deletions(-)
> >
> > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
> > index e1d55331b618..b4cf6c519d71 100644
> > --- a/lib/Kconfig.kasan
> > +++ b/lib/Kconfig.kasan
> > @@ -24,6 +24,9 @@ menuconfig KASAN
> >                  (HAVE_ARCH_KASAN_SW_TAGS && CC_HAS_KASAN_SW_TAGS)
> >       depends on (SLUB && SYSFS) || (SLAB && !DEBUG_SLAB)
> >       depends on CC_HAS_WORKING_NOSANITIZE_ADDRESS
> > +     select SLUB_DEBUG if SLUB
> > +     select CONSTRUCTORS
> > +     select STACKDEPOT
>
> In the later patch your move 'select SLUB_DEBUG' back to where they were
> here it seems. The end result is the same, so I leave it to you if you
> want to change it.

Will fix in v4, thank you!

>
> >       help
> >         Enables KASAN (KernelAddressSANitizer) - runtime memory debugger,
> >         designed to find out-of-bounds accesses and use-after-free bugs.
> > @@ -46,10 +49,6 @@ choice
> >  config KASAN_GENERIC
> >       bool "Generic mode"
> >       depends on HAVE_ARCH_KASAN && CC_HAS_KASAN_GENERIC
> > -     depends on (SLUB && SYSFS) || (SLAB && !DEBUG_SLAB)
> > -     select SLUB_DEBUG if SLUB
> > -     select CONSTRUCTORS
> > -     select STACKDEPOT
> >       help
> >         Enables generic KASAN mode.
> >
> > @@ -70,10 +69,6 @@ config KASAN_GENERIC
> >  config KASAN_SW_TAGS
> >       bool "Software tag-based mode"
> >       depends on HAVE_ARCH_KASAN_SW_TAGS && CC_HAS_KASAN_SW_TAGS
> > -     depends on (SLUB && SYSFS) || (SLAB && !DEBUG_SLAB)
> > -     select SLUB_DEBUG if SLUB
> > -     select CONSTRUCTORS
> > -     select STACKDEPOT
> >       help
> >         Enables software tag-based KASAN mode.
> >
> > --
> > 2.28.0.681.g6f77f65b4e-goog
> >