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From:   Alexander Potapenko <glider@google.com>
Date:   Tue, 2 Aug 2022 18:31:23 +0200
Message-ID: <CAG_fn=UBVs+QgdWDa_UB_zs0OUO=-zjcoH+8NY7obUm20rkBOQ@mail.gmail.com>
Subject: Re: [PATCH v4 15/45] mm: kmsan: call KMSAN hooks from SLUB code
To:     Marco Elver <elver@google.com>
Cc:     Alexander Viro <viro@zeniv.linux.org.uk>,
        Alexei Starovoitov <ast@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andrey Konovalov <andreyknvl@google.com>,
        Andy Lutomirski <luto@kernel.org>,
        Arnd Bergmann <arnd@arndb.de>, Borislav Petkov <bp@alien8.de>,
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        Christoph Lameter <cl@linux.com>,
        David Rientjes <rientjes@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
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        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Herbert Xu <herbert@gondor.apana.org.au>,
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On Tue, Jul 12, 2022 at 3:14 PM Marco Elver <elver@google.com> wrote:
>
> On Fri, 1 Jul 2022 at 16:23, 'Alexander Potapenko' via kasan-dev
> <kasan-dev@googlegroups.com> wrote:
> >
> > In order to report uninitialized memory coming from heap allocations
> > KMSAN has to poison them unless they're created with __GFP_ZERO.
> >
> > It's handy that we need KMSAN hooks in the places where
> > init_on_alloc/init_on_free initialization is performed.
> >
> > In addition, we apply __no_kmsan_checks to get_freepointer_safe() to
> > suppress reports when accessing freelist pointers that reside in freed
> > objects.
> >
> > Signed-off-by: Alexander Potapenko <glider@google.com>
>
> Reviewed-by: Marco Elver <elver@google.com>
>
> But see comment below.
>

>
> Remove unnecessary whitespace change.
Will do, thanks for catching!


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Alexander Potapenko
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