linux-kernel - Re: scripts/selinux build error in 4.14 after glibc update

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Message-ID: <20190429124002.GB31371@kroah.com>
Date:   Mon, 29 Apr 2019 14:40:02 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Paul Moore <paul@...l-moore.com>
Cc:     Sasha Levin <sashal@...nel.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        Eric Paris <eparis@...isplace.org>, selinux@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Nicolas Iooss <nicolas.iooss@....org>
Subject: Re: scripts/selinux build error in 4.14 after glibc update

On Tue, Apr 23, 2019 at 09:43:09AM -0400, Paul Moore wrote:
> On Tue, Apr 23, 2019 at 9:29 AM Sasha Levin <sashal@...nel.org> wrote:
> > On Mon, Apr 22, 2019 at 09:59:47PM -0400, Paul Moore wrote:
> > >On Mon, Apr 22, 2019 at 5:00 PM Nathan Chancellor
> > ><natechancellor@...il.com> wrote:
> > >> Hi all,
> > >>
> > >> After a glibc update to 2.29, my 4.14 builds started failing like so:
> > >
> > >...
> > >
> > >>   HOSTCC  scripts/selinux/genheaders/genheaders
> > >> In file included from scripts/selinux/genheaders/genheaders.c:19:
> > >> ./security/selinux/include/classmap.h:245:2: error: #error New address family defined, please update secclass_map.
> > >>  #error New address family defined, please update secclass_map.
> > >>   ^~~~~
> > >
> > >This is a known problem that has a fix in the selinux/next branch and
> > >will be going up to Linus during the next merge window.  The fix is
> > >quite small and should be relatively easy for you to backport to your
> > >kernel build if you are interested; the patch can be found at the
> > >archive link below:
> > >
> > >https://lore.kernel.org/selinux/20190225005528.28371-1-paulo@paulo.ac
> >
> > Why is it waiting for the next merge window? It fixes a build bug that
> > people hit.
> 
> I place a reasonably high bar on patches that I send up to Linus
> outside of the merge window and I didn't feel this patch met that
> criteria.  Nathan is only the second person I've seen who has
> encountered this problem, the first being the original patch author.
> As far as I've seen, the problem is only seen by users building older
> kernels on very new userspaces (e.g. glibc v2.29 was released in
> February 2019, Linux v4.14 was released in 2017); this doesn't appear
> to be a large group of people and I didn't want to risk breaking the
> main kernel tree during the -rcX phase for such a small group.

Ugh, this breaks my local builds, I would recommend getting it to Linus
sooner please.

thanks,

greg k-h