linux-kernel - Re: [PATCH 3/3] arm64: Kconfig: support CONFIG_KASAN

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Message-ID: <CAAeHK+wc-DU2pUma43JtomOSy0Z6smGKwQoG_R+uKzByu3oZ9w@mail.gmail.com>
Date:   Fri, 8 Jan 2021 19:29:35 +0100
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     Lecopzer Chen <lecopzer@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-mediatek@...ts.infradead.org, yj.chiang@...iatek.com,
        Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Lecopzer Chen <lecopzer.chen@...iatek.com>
Subject: Re: [PATCH 3/3] arm64: Kconfig: support CONFIG_KASAN_VMALLOC

On Sun, Jan 3, 2021 at 6:13 PM Lecopzer Chen <lecopzer@...il.com> wrote:
>
> Now I have no device to test for HW_TAG, so keep it not selected
> until someone can test this.
>
> Signed-off-by: Lecopzer Chen <lecopzer.chen@...iatek.com>
> ---
>  arch/arm64/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 05e17351e4f3..29ab35aab59e 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -136,6 +136,7 @@ config ARM64
>         select HAVE_ARCH_JUMP_LABEL
>         select HAVE_ARCH_JUMP_LABEL_RELATIVE
>         select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
> +       select HAVE_ARCH_KASAN_VMALLOC if (HAVE_ARCH_KASAN && !KASAN_HW_TAGS)

KASAN_VMALLOC currently "depends on" KASAN_GENERIC. I think we should
either do "HAVE_ARCH_KASAN && KASAN_GENERIC" here as well, or just do
"if HAVE_ARCH_KASAN".

>         select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN
>         select HAVE_ARCH_KASAN_HW_TAGS if (HAVE_ARCH_KASAN && ARM64_MTE)
>         select HAVE_ARCH_KGDB
> --
> 2.25.1
>
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