linux-kernel - Re: more build problems with "Makefile: move stackprotector availability out of Kconfig"

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Message-ID: <CAGXu5jL1bYxHTOAFvO7O=a+3NP1zU8rOisF0WBoX6Sg0EyvQ6g@mail.gmail.com>
Date:   Tue, 17 Oct 2017 11:53:10 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: more build problems with "Makefile: move stackprotector
 availability out of Kconfig"

On Tue, Oct 17, 2017 at 11:52 AM, Mark Brown <broonie@...nel.org> wrote:
> On Tue, Oct 17, 2017 at 08:47:06PM +0200, Arnd Bergmann wrote:
>
>> To clarify: with my gcc-4.9/gcc-5 build, -mstack-protector-guard=tls
>> has no effect,
>> the output is the same as with -mstack-protector-guard=global using the Ubuntu
>> compilers of the same version.
>
> Jumping in here...  on IRC Arnd suggested reverting 123c48cf899d
> ("Makefile: introduce CONFIG_CC_STACKPROTECTOR_AUTO") from -next.  What
> do you think Kees?

Until we sort this out, yes, agreed. Andrew, can you pull the patches?

-Kees

-- 
Kees Cook
Pixel Security