linux-kernel - Re: linux-next: build failure after merge of the akpm-current tree

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Message-ID: <1497491922.1435.1.camel@gmail.com>
Date:   Wed, 14 Jun 2017 21:58:42 -0400
From:   Daniel Micay <danielmicay@...il.com>
To:     Kees Cook <keescook@...omium.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the akpm-current tree

On Wed, 2017-06-14 at 18:56 -0700, Kees Cook wrote:
> On Wed, Jun 14, 2017 at 6:35 PM, Stephen Rothwell <sfr@...b.auug.org.a
> u> wrote:
> > Hi all,
> > 
> > On Mon, 5 Jun 2017 17:01:17 +1000 Stephen Rothwell <sfr@...b.auug.or
> > g.au> wrote:
> > > 
> > > After merging the akpm-current tree, today's linux-next build
> > > (x86_64
> > > allmodconfig) failed like this:
> > > 
> > > sound/pcmcia/pdaudiocf/pdaudiocf.o: warning: objtool: .text:
> > > unexpected end of section
> > > arch/x86/ras/mce_amd_inj.o: warning: objtool: inj_readme_read()
> > > falls through to next function extcpu_fops_open()
> > > sound/sound_core.o: warning: objtool:
> > > register_sound_special_device() falls through to next function
> > > register_sound_special()
> 
> Are these related to the fortify patch? I wouldn't expect that...

They're false positive warnings. I think objtool has a list of
__noreturn functions and needs fortify_panic added there. It's just a
warning so it doesn't need to happen immediately.