linux-hardening - Re: [PATCH] gcc-plugins: Disable GCC_PLUGIN_CYC

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Message-ID: <202102231016.F212B396@keescook>
Date:   Tue, 23 Feb 2021 10:17:14 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Heiko Carstens <hca@...ux.ibm.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-hardening@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...nel.org>
Subject: Re: [PATCH] gcc-plugins: Disable GCC_PLUGIN_CYC_COMPLEXITY for s390

On Tue, Feb 23, 2021 at 07:03:47PM +0100, Heiko Carstens wrote:
> Well, if we would have e.g. RANDCONFIG, then we could probably revert
> 334ef6ed06fa ("init/Kconfig: make COMPILE_TEST depend on !S390") and
> instead let COMPILE_TEST depend on !RANDCONFIG.
> I think this _could_ solve all common problems we currently see.
> 
> And it would also do what you suggested.

I've wanted similar (e.g. for some UBSAN options that would go weird
under RANDCONFIG). :)

-- 
Kees Cook