linux-kernel - Re: [patch core/stackprotector] stackprotector: Fix build when compiler lacks support

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

Date:	Tue, 31 Dec 2013 16:16:01 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Kees Cook <keescook@...omium.org>
Cc:	David Rientjes <rientjes@...gle.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	James Hogan <james.hogan@...tec.com>,
	Michal Marek <mmarek@...e.cz>,
	Paul Mundt <lethal@...ux-sh.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [patch core/stackprotector] stackprotector: Fix build when
 compiler lacks support

On Mon, Dec 30, 2013 at 4:45 PM, Kees Cook <keescook@...omium.org> wrote:
>
> NAK. If you have selected CONFIG_CC_STACKPROTECTOR_STRONG, the build
> the fail hard. Without this, it means you'll end up with kernels that
> build and show a stackprotector option in their config, which is
> false.

What we really really want to do is to have some way to add config
options based on shell scripts and compiler support. That would also
get rid of a lot of Makefile trickery etc.

Then we could just make CC_STACKPROTECTOR_STRONG depend on
CC_SUPPORTS_STACKPROTECTOR_STRONG or whatever.

                Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/