linux-kernel - Re: [kernel-hardening] [PATCH v8 2/4] GCC plugin infrastructure

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Date:	Fri, 20 May 2016 16:22:03 +1000
From:	Andrew Donnellan <andrew.donnellan@....ibm.com>
To:	pageexec@...email.hu, Emese Revfy <re.emese@...il.com>,
	kernel-hardening@...ts.openwall.com,
	Michael Ellerman <mpe@...erman.id.au>
Cc:	linux-kbuild@...r.kernel.org, spender@...ecurity.net,
	mmarek@...e.com, keescook@...omium.org, linux@...musvillemoes.dk,
	fengguang.wu@...el.com, dvyukov@...gle.com,
	linux-kernel@...r.kernel.org, david.brown@...aro.org,
	yamada.masahiro@...ionext.com,
	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	Daniel Axtens <dja@...ens.net>
Subject: Re: [kernel-hardening] [PATCH v8 2/4] GCC plugin infrastructure

On 19/05/16 18:24, PaX Team wrote:
> the earlier plugin capable gcc versions used to install gcc headers in a somewhat
> ad-hoc manner resulting in compile time breakage for plugins and since some of
> those potentially missing headers are target specific, each target arch should
> be verified before enabling plugin support on them. things have much improved with
> gcc 5 (see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61176) though there's still
> an occasional missing header but with wider use of plugins they will hopefully be
> discovered earlier now. perhaps linux-arch should be cc'ed on the plugin infrastructure
> so that arch maintainers are aware of this?

Upon further testing it does seem we've got header issues as well as 
hitting a segfault on 4.7.0. Looking into it further...

-- 
Andrew Donnellan              OzLabs, ADL Canberra
andrew.donnellan@....ibm.com  IBM Australia Limited