linux-kernel - Re: [PATCH v1] kbuild: enforce -Werror=return-type

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Sun, 11 Oct 2020 22:27:39 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Olaf Hering <olaf@...fle.de>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: Re: [PATCH v1] kbuild: enforce -Werror=return-type

On Mon, Oct 5, 2020 at 7:13 PM Olaf Hering <olaf@...fle.de> wrote:
>
> Catch errors which at least gcc tolerates by default:
>  warning: 'return' with no value, in function returning non-void [-Wreturn-type]
>
> Signed-off-by: Olaf Hering <olaf@...fle.de>
> ---
>  Makefile | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/Makefile b/Makefile
> index f84d7e4ca0be..7b2e63e7be18 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -942,6 +942,9 @@ KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
>  # enforce correct pointer usage
>  KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
>
> +# enforce correct return type
> +KBUILD_CFLAGS   += $(call cc-option,-Werror=return-type)
> +



cc-option is unneeded because the minimal supported versions
of GCC/Clang support -Werror=return-type.

You can hard-code and add it around line 500.



>  # Require designated initializers for all marked structures
>  KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
>


-- 
Best Regards
Masahiro Yamada