linux-kernel - Re: [PATCH] kbuild: Abort build on bad stack protector flag

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Date:	Sat, 9 Jul 2016 14:03:02 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Kees Cook <keescook@...omium.org>
Cc:	Michal Marek <mmarek@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org,
	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] kbuild: Abort build on bad stack protector flag


* Kees Cook <keescook@...omium.org> wrote:

> Before, the stack protector flag was sanity checked before .config had
> been reprocessed. This meant the build couldn't be aborted early, and
> only a warning could be emitted followed later by the compiler blowing
> up with an unknown flag. This has caused a lot of confusion over time,
> so this splits the flag selection from sanity checking and performs the
> sanity checking after the make has been restarted from a reprocessed
> .config, so builds can be aborted as early as possible now.
> 
> Additionally moves the x86-specific sanity check to the same location,
> since it suffered from the same warn-then-wait-for-compiler-failure
> problem.
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
>  Makefile          | 69 +++++++++++++++++++++++++++++++++----------------------
>  arch/x86/Makefile |  8 -------
>  2 files changed, 42 insertions(+), 35 deletions(-)

What's the status of this patch? I can merge it if Michal acks the main Makefile 
bits.

Thanks,

	Ingo