linux-kernel - Re: [PATCH v2 2/2] kbuild: Disable CONFIG_LD_ORPHAN

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Message-ID: <202012011255.9D677ED3@keescook>
Date:   Tue, 1 Dec 2020 12:56:01 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        "kernelci . org bot" <bot@...nelci.org>,
        Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v2 2/2] kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld
 10.0.1

On Tue, Dec 01, 2020 at 10:31:37PM +0900, Masahiro Yamada wrote:
> On Wed, Nov 25, 2020 at 7:22 AM Kees Cook <keescook@...omium.org> wrote:
> >
> > On Thu, Nov 19, 2020 at 01:13:27PM -0800, Nick Desaulniers wrote:
> > > On Thu, Nov 19, 2020 at 12:57 PM Nathan Chancellor
> > > <natechancellor@...il.com> wrote:
> > > >
> > > > ld.lld 10.0.1 spews a bunch of various warnings about .rela sections,
> > > > along with a few others. Newer versions of ld.lld do not have these
> > > > warnings. As a result, do not add '--orphan-handling=warn' to
> > > > LDFLAGS_vmlinux if ld.lld's version is not new enough.
> > > >
> > > > Link: https://github.com/ClangBuiltLinux/linux/issues/1187
> > > > Link: https://github.com/ClangBuiltLinux/linux/issues/1193
> > > > Reported-by: Arvind Sankar <nivedita@...m.mit.edu>
> > > > Reported-by: kernelci.org bot <bot@...nelci.org>
> > > > Reported-by: Mark Brown <broonie@...nel.org>
> > > > Reviewed-by: Kees Cook <keescook@...omium.org>
> > > > Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> > >
> > > Thanks for the additions in v2.
> > > Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
> >
> > I'm going to carry this for a few days in -next, and if no one screams,
> > ask Linus to pull it for v5.10-rc6.
> >
> > Thanks!
> >
> > --
> > Kees Cook
> 
> 
> Sorry for the delay.
> Applied to linux-kbuild.

Great, thanks!

> But, I already see this in linux-next.
> Please let me know if I should drop it from my tree.

My intention was to get this to Linus this week. Do you want to do that
yourself, or Ack the patches in my tree and I'll send it?

-Kees

-- 
Kees Cook