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SubjectRe: [PATCH 5/5] Makefile: Enable -Wzero-length-bounds
On Wed, Aug 18, 2021 at 1:11 AM Kees Cook <keescook@chromium.org> wrote:
>
> With all known internal zero-length accesses fixed, it is possible to
> enable -Wzero-length-bounds globally. Since this is included by default
> in -Warray-bounds, we just need to stop disabling it.
>
> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Masahiro Yamada <masahiroy@kernel.org>
> Cc: linux-kbuild@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>

Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

> ---
> Makefile | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index af22b83cede7..3b6fb740584e 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1071,7 +1071,6 @@ KBUILD_CFLAGS += -Wno-pointer-sign
> KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
>
> # We'll want to enable this eventually, but it's not going away for 5.7 at least
> -KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
> KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
>
> # Another good warning that we'll want to enable eventually
> --

--
Thanks,
~Nick Desaulniers

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