linux-kernel - Re: [PATCH v4 07/11] mm: kasan: Use is

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Message-ID: <CAG_fn=XD+nVgVRgj7KFsPWSuia+gZzpA3KAdqucjKodOvxSF6w@mail.gmail.com>
Date:   Thu, 30 Sep 2021 17:45:35 +0200
From:   Alexander Potapenko <glider@...gle.com>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linuxppc-dev@...ts.ozlabs.org,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        David Miller <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>, bpf@...r.kernel.org,
        linux-alpha@...r.kernel.org,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH v4 07/11] mm: kasan: Use is_kernel() helper

On Thu, Sep 30, 2021 at 9:09 AM Kefeng Wang <wangkefeng.wang@...wei.com> wrote:
>
> Directly use is_kernel() helper in kernel_or_module_addr().
>
> Cc: Andrey Ryabinin <ryabinin.a.a@...il.com>
> Cc: Alexander Potapenko <glider@...gle.com>
> Cc: Andrey Konovalov <andreyknvl@...il.com>
> Cc: Dmitry Vyukov <dvyukov@...gle.com>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
Reviewed-by: Alexander Potapenko <glider@...gle.com>

> ---
>  mm/kasan/report.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/kasan/report.c b/mm/kasan/report.c
> index 3239fd8f8747..1c955e1c98d5 100644
> --- a/mm/kasan/report.c
> +++ b/mm/kasan/report.c
> @@ -226,7 +226,7 @@ static void describe_object(struct kmem_cache *cache, void *object,
>
>  static inline bool kernel_or_module_addr(const void *addr)
>  {
> -       if (addr >= (void *)_stext && addr < (void *)_end)
> +       if (is_kernel((unsigned long)addr))
>                 return true;
>         if (is_module_address((unsigned long)addr))
>                 return true;
> --
> 2.26.2
>


-- 
Alexander Potapenko
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