Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Sun, 15 Apr 2018 22:58:07 +0200
From:   Pavel Machek <pavel@ucw.cz>
To:     Kees Cook <keescook@chromium.org>
Cc:     Daniel Micay <danielmicay@gmail.com>,
        Tony Lindgren <tony@atomide.com>,
        Thorsten Leemhuis <regressions@leemhuis.info>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Linux-Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        pali.rohar@gmail.com, sre@kernel.org,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        linux-omap@vger.kernel.org, Kevin Hilman <khilman@kernel.org>,
        Aaro Koskinen <aaro.koskinen@iki.fi>,
        ivo.g.dimitrov.75@gmail.com,
        Patrik Bachan <patrikbachan@gmail.com>,
        "Serge E. Hallyn" <serge@hallyn.com>,
        =?utf-8?B?TWlja3Vsw6HFoQ==?= Qwertz <abcloriens@gmail.com>,
        Clayton Craft <clayton@craftyguy.net>,
        Martijn Braam <martijn@brixit.nl>,
        Sakari Ailus <sakari.ailus@linux.intel.com>,
        Filip =?utf-8?Q?Matijevi=C4=87?= <filip.matijevic.pz@gmail.com>,
        Jinbum Park <jinb.park7@gmail.com>,
        Russell King <rmk+kernel@armlinux.org.uk>
Subject: Re: [regression v4.17-rc0] Re: FORTIFY_SOURCE breaks ARM compilation
 in -next -- was Re: ARM compile failure in Re: linux-next: Tree for Apr 4
Message-ID: <20180415205807.GA4182@amd>
References: <20180404165559.4cd0c12c@canb.auug.org.au>
 <20180404074856.GA9342@amd>
 <20180404175852.GI5700@atomide.com>
 <20180404184622.GA8608@amd>
 <20180404195951.GJ5700@atomide.com>
 <20180404201837.GA9710@amd>
 <20180415173908.GA2024@amd>
 <CAGXu5jK9f62n95sOdJViXHXzQFyCdcsWt9HPvcdSFRp9Qqg0bg@mail.gmail.com>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
        protocol="application/pgp-signature"; boundary="l76fUT7nc3MelDdI"
Content-Disposition: inline
In-Reply-To: <CAGXu5jK9f62n95sOdJViXHXzQFyCdcsWt9HPvcdSFRp9Qqg0bg@mail.gmail.com>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


--l76fUT7nc3MelDdI
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Sun 2018-04-15 11:00:06, Kees Cook wrote:
> On Sun, Apr 15, 2018 at 10:39 AM, Pavel Machek <pavel@ucw.cz> wrote:
> > Hi!
> >
> >> Thanks.
> >>
> >> Ok, let me try to bisect it. Compile-problem should be easy...
> >>
> >> Hmm. And as it is compile-problem in single file, it should even be
> >> reasonably fast. I did not realize how easy it would be:
> >>
> >> #!/bin/bash
> >> set -e
> >> cp config.ok .config
> >> yes '' | ARCH=3Darm make lib/string.o
> >>
> >> And the winner is:
> >>
> >> ee333554fed55555a986a90bb097ac7f9d6f05bf is the first bad commit
> >> commit ee333554fed55555a986a90bb097ac7f9d6f05bf
> >> Author: Jinbum Park <jinb.park7@gmail.com>
> >> Date:   Tue Mar 6 01:39:24 2018 +0100
> > ...
> >
> >>     Acked-by: Kees Cook <keescook@chromium.org>
> >>     Signed-off-by: Jinbum Park <jinb.park7@gmail.com>
> >>     Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
> >
> > So I bisect a problem in -next, and patch is merged to Linus,
> > _anyway_, breaking compilation there? Neither Jinbum nor Russell even
> > bother to comment.
>=20
> Hi! Sorry I lost this email in my inbox. It seems this is specific to
> a particular subset of arm architectures? (My local builds of arm all
> succeed, for example. Can you send your failing config?) I'll take a
> closer look on Monday if Daniel doesn't beat me to it.

I believe it depends on gcc version really. I should get some sleep
now, but details should be in the corresponding thread on lkml.

I'll send you my .config privately.
								Pavel

--=20
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo=
g.html

--l76fUT7nc3MelDdI
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iEYEARECAAYFAlrTvN8ACgkQMOfwapXb+vLhTgCcDvOONplDwZ2uDNCkiG3G/Bdl
r+IAnRjHLy9V9BdOAYE8Gwk4ejKlbl0k
=MBNZ
-----END PGP SIGNATURE-----

--l76fUT7nc3MelDdI--