linux-kernel - Re: [PATCH] arm64: Always use REFCOUNT

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Date:   Wed, 20 Sep 2017 15:44:17 -0700
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "Likun (Hw)" <hw.likun@...wei.com>
Subject: Re: [PATCH] arm64: Always use REFCOUNT_FULL

On 20 September 2017 at 13:49, Kees Cook <keescook@...omium.org> wrote:
> As discussed at the Linux Security Summit, arm64 prefers to use
> REFCOUNT_FULL by default. This enables it for the architecture.
>
> Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
> Cc: hw.likun@...wei.com
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will.deacon@....com>
> Cc: linux-arm-kernel@...ts.infradead.org
> Signed-off-by: Kees Cook <keescook@...omium.org>

Acked-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>


> ---
>  arch/arm64/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 0df64a6a56d4..9fe7a7f4c94c 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -119,6 +119,7 @@ config ARM64
>         select PCI_ECAM if ACPI
>         select POWER_RESET
>         select POWER_SUPPLY
> +       select REFCOUNT_FULL
>         select SPARSE_IRQ
>         select SYSCTL_EXCEPTION_TRACE
>         select THREAD_INFO_IN_TASK
> --
> 2.7.4
>
>
> --
> Kees Cook
> Pixel Security