linux-kernel - Re: [PATCH] kbuild: Allow LTO to be selected with KASAN_HW

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Message-ID: <202103081339.B18898E@keescook>
Date:   Mon, 8 Mar 2021 13:39:28 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alistair Delva <adelva@...gle.com>
Subject: Re: [PATCH] kbuild: Allow LTO to be selected with KASAN_HW_TAGS

On Mon, Mar 08, 2021 at 10:46:56AM -0800, Sami Tolvanen wrote:
> While LTO with KASAN is normally not useful, hardware tag-based KASAN
> can be used also in production kernels with ARM64_MTE. Therefore, allow
> KASAN_HW_TAGS to be selected together with HAS_LTO_CLANG.
> 
> Reported-by: Alistair Delva <adelva@...gle.com>
> Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook