linux-hardening - Re: [PATCH v3 4/5] Makefile: Enable -Warray-bounds

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Date:   Tue, 31 Aug 2021 13:49:33 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Kees Cook <keescook@...omium.org>
Cc:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org,
        "Gustavo A . R . Silva" <gustavoars@...nel.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Keith Packard <keithp@...thp.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        clang-built-linux@...glegroups.com, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v3 4/5] Makefile: Enable -Warray-bounds

On 8/31/21 1:18 PM, Kees Cook wrote:
> On Tue, Aug 31, 2021 at 12:40:53PM -0700, Guenter Roeck wrote:
>> The configuration doesn't matter; it fails for me for all configurations,
>> including defconfig, alllnoconfig, and allmodconfig.
>> Key is to use gcc 11.2. The image builds just fine with gcc 9.4 and 10.3.
> 
> Ah! Yes, heh. That would be my problem; I've got 10.3 for my builders.
> Thanks! I will give 11.2 a spin.
> 
In case you don't have gcc 11.2 available - I tested with 11.1 as well;
that also fails.

Guenter