From: Kees Cook <keescook@chromium.org>
To: Fangrui Song <maskray@google.com>
Cc: Borislav Petkov <bp@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
x86@kernel.org, Arnd Bergmann <arnd@arndb.de>,
Nick Desaulniers <ndesaulniers@google.com>,
Nathan Chancellor <natechancellor@gmail.com>,
clang-built-linux@googlegroups.com, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/3] vmlinux.lds.h: Add .gnu.version* to DISCARDS
Date: Mon, 22 Jun 2020 15:09:17 -0700 [thread overview]
Message-ID: <202006221508.F3A8D3B9@keescook> (raw)
In-Reply-To: <20200622220043.6j3vl6v7udmk2ppp@google.com>
On Mon, Jun 22, 2020 at 03:00:43PM -0700, Fangrui Song wrote:
> On 2020-06-22, Kees Cook wrote:
> > For vmlinux linking, no architecture uses the .gnu.version* section,
> > so remove it via the common DISCARDS macro in preparation for adding
> > --orphan-handling=warn more widely.
> >
> > Signed-off-by: Kees Cook <keescook@chromium.org>
> > ---
> > include/asm-generic/vmlinux.lds.h | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> > index db600ef218d7..6fbe9ed10cdb 100644
> > --- a/include/asm-generic/vmlinux.lds.h
> > +++ b/include/asm-generic/vmlinux.lds.h
> > @@ -934,6 +934,7 @@
> > *(.discard) \
> > *(.discard.*) \
> > *(.modinfo) \
> > + *(.gnu.version*) \
> > }
> >
> > /**
> > --
> > 2.25.1
>
> I wonder what lead to .gnu.version{,_d,_r} sections in the kernel.
Here's where I see it:
ld: warning: orphan section `.gnu.version_d' from `arch/x86/boot/compressed/kernel_info.o' being placed in section `.gnu.version_d'
--
Kees Cook
next prev parent reply other threads:[~2020-06-22 22:09 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-22 20:53 [PATCH v2 0/3] x86: Warn on orphan section placement Kees Cook
2020-06-22 20:53 ` [PATCH v2 1/3] vmlinux.lds.h: Add .gnu.version* to DISCARDS Kees Cook
2020-06-22 20:53 ` Kees Cook
2020-06-22 22:00 ` Fangrui Song
2020-06-22 22:00 ` Fangrui Song
2020-06-22 22:09 ` Kees Cook [this message]
2020-06-22 22:27 ` Kees Cook
2020-06-22 22:27 ` Kees Cook
2020-06-22 22:52 ` Fangrui Song
2020-06-22 22:57 ` Kees Cook
2020-06-22 23:04 ` Fāng-ruì Sòng
2020-06-22 23:04 ` Fāng-ruì Sòng
2020-06-22 23:30 ` Kees Cook
2020-06-22 20:53 ` [PATCH v2 2/3] x86/build: Warn on orphan section placement Kees Cook
2020-06-22 20:53 ` [PATCH v2 3/3] x86/boot: " Kees Cook
2020-06-22 22:06 ` Fangrui Song
2020-06-22 22:35 ` Kees Cook
2020-06-22 22:43 ` Kees Cook
2020-06-22 22:43 ` Kees Cook
2020-06-22 22:49 ` Fangrui Song
2020-06-22 22:49 ` Fangrui Song
2020-06-22 23:00 ` Kees Cook
2020-06-22 23:00 ` Kees Cook
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