linux-kernel - Re: [PATCH -mmotm] arm64: skip kmemleak for KASAN again

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Message-ID: <CAAeHK+zj0LcjhcQFd4H9CfRbyzz8u+HuhA4-c-pjnDobkDGRJQ@mail.gmail.com>
Date:   Thu, 27 Dec 2018 16:21:00 +0100
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     Qian Cai <cai@....pw>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -mmotm] arm64: skip kmemleak for KASAN again

On Wed, Dec 26, 2018 at 3:06 AM Qian Cai <cai@....pw> wrote:
>
> Due to 871ac3d540f (kasan: initialize shadow to 0xff for tag-based
> mode), kmemleak is broken again with KASAN. It needs a similar fix
> from e55058c2983 (mm/memblock.c: skip kmemleak for kasan_init()).
>
> Signed-off-by: Qian Cai <cai@....pw>

Hi Qian,

Sorry, didn't see your first kmemleak fix. I can merge this fix into
my series if I end up resending it.

In any case:

Acked-by: Andrey Konovalov <andreyknvl@...gle.com>

Thanks!

> ---
>  arch/arm64/mm/kasan_init.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c
> index 48d8f2fa0d14..4b55b15707a3 100644
> --- a/arch/arm64/mm/kasan_init.c
> +++ b/arch/arm64/mm/kasan_init.c
> @@ -47,8 +47,7 @@ static phys_addr_t __init kasan_alloc_raw_page(int node)
>  {
>         void *p = memblock_alloc_try_nid_raw(PAGE_SIZE, PAGE_SIZE,
>                                                 __pa(MAX_DMA_ADDRESS),
> -                                               MEMBLOCK_ALLOC_ACCESSIBLE,
> -                                               node);
> +                                               MEMBLOCK_ALLOC_KASAN, node);
>         return __pa(p);
>  }
>
> --
> 2.17.2 (Apple Git-113)
>