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

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Date:   Mon, 27 Feb 2023 09:18:03 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Christian Brauner <brauner@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Christian Brauner <christian@...uner.io>,
        Giuseppe Scrivano <gscrivan@...hat.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Joey Gouly <joey.gouly@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the mm tree

Hi Christian,

On Mon, 30 Jan 2023 09:09:56 +0100 Christian Brauner <brauner@...nel.org> wrote:
>
> On Mon, Jan 30, 2023 at 04:14:14PM +1100, Stephen Rothwell wrote:
> > Hi all,
> > 
> > After merging the mm tree, today's linux-next build (powerpc
> > ppc64_defconfig) failed like this:
> > 
> > kernel/sys.c: In function '__do_sys_prctl':
> > kernel/sys.c:2664:9: error: duplicate case value
> >  2664 |         case PR_SET_HIDE_SELF_EXE:
> >       |         ^~~~
> > kernel/sys.c:2655:9: note: previously used here
> >  2655 |         case PR_SET_MDWE:
> >       |         ^~~~
> > kernel/sys.c:2669:9: error: duplicate case value
> >  2669 |         case PR_GET_HIDE_SELF_EXE:
> >       |         ^~~~
> > kernel/sys.c:2658:9: note: previously used here
> >  2658 |         case PR_GET_MDWE:
> >       |         ^~~~
> > 
> > Caused by commit
> > 
> >   ab30677b499c ("mm: implement memory-deny-write-execute as a prctl")
> > 
> > interacting with commit
> > 
> >   966eb1ba050d ("exec: add PR_HIDE_SELF_EXE prctl")
> > 
> > from the pidfd tree.
> > 
> > I have applied the following merge fix patch.
> > 
> > From: Stephen Rothwell <sfr@...b.auug.org.au>
> > Date: Mon, 30 Jan 2023 16:08:34 +1100
> > Subject: [PATCH] mm: fixup for "mm: implement memory-deny-write-execute as a prctl"
> > 
> > interacting with
> > 
> >   966eb1ba050d ("exec: add PR_HIDE_SELF_EXE prctl")
> > 
> > Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> > ---  
> 
> Thanks Stephen,
> 
> I'm moving this out of -next for now until we've settled a few more
> details.

I am still applying this to the merge of the pidfd tree.  Also I
noticed that a similar fixup will need to be applied to
tools/testing/selftests/prctl/hide-self-exe.c

-- 
Cheers,
Stephen Rothwell

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