linux-kernel - Re: [PATCH] lkdtm: add test for executing .rodata

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Message-ID: <CAGXu5jJpULmVV_XneyhB8zpNgY-cKk-mtHL9v_veAbgU7gOZGw@mail.gmail.com>
Date:	Tue, 23 Feb 2016 14:02:54 -0800
From:	Kees Cook <keescook@...omium.org>
To:	PaX Team <pageexec@...email.hu>
Cc:	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Laura Abbott <labbott@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mark Rutland <mark.rutland@....com>,
	Jeremy Linton <jeremy.linton@....com>,
	Arnd Bergmann <arnd@...db.de>,
	"kernel-hardening@...ts.openwall.com" 
	<kernel-hardening@...ts.openwall.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] lkdtm: add test for executing .rodata

On Tue, Feb 23, 2016 at 2:00 PM, PaX Team <pageexec@...email.hu> wrote:
> On 23 Feb 2016 at 12:53, Kees Cook wrote:
>
>> I prefer using all the "regular" mechanisms so that I really know I'm
>> exercising the actual case I want to be testing. (i.e. I don't want to
>> bypass the linker.)
>>
>> If only there were some way to filter gcc output, like with plugins. ;)
>
> plugins can set/override section flags, initify and constify both do in
> fact but i guess that's little help for your generic case that has to
> work without them as well.

I don't mind using a plugin to get the linker to see the right flags. :)

I'm hoping someone will take pity on me in the kbuild list.

-Kees

-- 
Kees Cook
Chrome OS & Brillo Security