From: Kees Cook <keescook@chromium.org>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: bp@alien8.de, Arvind Sankar <nivedita@alum.mit.edu>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Thomas Lendacky <Thomas.Lendacky@amd.com>,
Mauro Rossi <issor.oruam@gmail.com>, Michael Matz <matz@suse.de>
Subject: Re: [PATCH] Documentation/changes: Raise minimum supported binutils version to 2.23
Date: Mon, 23 Mar 2020 13:51:18 -0700 [thread overview]
Message-ID: <202003231350.7D35351@keescook> (raw)
In-Reply-To: <20200323204454.GA2611336@zx2c4.com>
On Mon, Mar 23, 2020 at 02:44:54PM -0600, Jason A. Donenfeld wrote:
> On Mon, Mar 16, 2020 at 05:02:59PM +0100, Borislav Petkov wrote:
> > Long overdue patch, see below.
> >
> > Plan is to queue it after 5.7-rc1.
> >
> > ---
> > From: Borislav Petkov <bp@suse.de>
> > Date: Mon, 16 Mar 2020 16:28:36 +0100
> > Subject: [PATCH] Documentation/changes: Raise minimum supported binutilsa version to 2.23
> >
> > The currently minimum-supported binutils version 2.21 has the problem of
> > promoting symbols which are defined outside of a section into absolute.
> > According to Arvind:
> >
> > binutils-2.21 and -2.22. An x86-64 defconfig will fail with
> > Invalid absolute R_X86_64_32S relocation: _etext
> > and after fixing that one, with
> > Invalid absolute R_X86_64_32S relocation: __end_of_kernel_reserve
> >
> > Those two versions of binutils have a bug when it comes to handling
> > symbols defined outside of a section and binutils 2.23 has the proper
> > fix, see: https://sourceware.org/legacy-ml/binutils/2012-06/msg00155.html
> >
> > Therefore, up to the fixed version directly, skipping the broken ones.
> >
> > Currently shipping distros already have the fixed binutils version so
> > there should be no breakage resulting from this.
> >
> > For more details about the whole thing, see the thread in Link.
>
> That sounds very good to me. Then we'll be able to use ADX instructions
> without ifdefs.
>
> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com>
Can you send these now and we can land in 5.7 with the doc change?
-Kees
--
Kees Cook
next prev parent reply other threads:[~2020-03-23 20:51 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 20:23 [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve to S_REL Arvind Sankar
2020-01-10 20:38 ` Borislav Petkov
2020-01-10 20:50 ` Arvind Sankar
2020-01-10 21:50 ` [PATCH v2] " Arvind Sankar
2020-01-10 21:52 ` Arvind Sankar
2020-01-11 13:02 ` [PATCH] " Borislav Petkov
2020-01-11 17:20 ` Arvind Sankar
2020-01-11 17:32 ` Arvind Sankar
2020-01-13 13:43 ` Borislav Petkov
2020-01-13 16:13 ` Arvind Sankar
2020-01-13 16:38 ` Borislav Petkov
2020-01-13 17:59 ` Arvind Sankar
2020-01-13 18:08 ` Borislav Petkov
2020-01-14 4:17 ` Arvind Sankar
2020-01-14 11:25 ` Borislav Petkov
2020-01-14 16:32 ` Arvind Sankar
2020-01-14 4:08 ` Arvind Sankar
2020-01-13 19:53 ` [PATCH v3] x86/vmlinux: Fix vmlinux.lds.S with pre-2.23 binutils Arvind Sankar
2020-01-13 21:46 ` Tom Lendacky
2020-01-13 23:06 ` Arvind Sankar
2020-01-14 1:53 ` Kees Cook
2020-01-14 1:57 ` H. Peter Anvin
2020-01-14 2:20 ` Kees Cook
2020-01-14 3:58 ` Arvind Sankar
2020-01-14 5:05 ` hpa
2020-01-14 16:51 ` Borislav Petkov
2020-01-14 21:50 ` hpa
2020-01-15 0:21 ` Arvind Sankar
2020-01-15 12:24 ` Borislav Petkov
2020-03-16 16:02 ` [PATCH] Documentation/changes: Raise minimum supported binutils version to 2.23 Borislav Petkov
2020-03-16 20:54 ` Kees Cook
2020-03-23 20:44 ` Jason A. Donenfeld
2020-03-23 20:51 ` Kees Cook [this message]
2020-03-23 21:11 ` Jason A. Donenfeld
2020-03-25 17:33 ` David Laight
2020-03-24 9:02 ` Masahiro Yamada
2020-03-24 9:12 ` Masahiro Yamada
2020-03-24 15:38 ` Arvind Sankar
2020-03-24 17:31 ` Masahiro Yamada
2020-03-24 21:36 ` Arvind Sankar
2020-03-24 9:14 ` Borislav Petkov
2020-03-24 9:40 ` Masahiro Yamada
2020-03-24 12:00 ` Borislav Petkov
2020-03-24 16:22 ` Jason A. Donenfeld
2020-03-24 16:28 ` Borislav Petkov
2020-03-24 16:37 ` Linus Torvalds
2020-03-24 16:48 ` Borislav Petkov
2020-03-24 21:42 ` Arvind Sankar
2020-03-24 22:01 ` Arvind Sankar
2020-03-24 22:14 ` Linus Torvalds
2020-03-24 23:49 ` Arvind Sankar
2020-03-24 17:53 ` Kees Cook
2020-03-23 20:50 ` [PATCH] Documentation/changes: Raise minimum supported binutilsa " Nick Desaulniers
2020-01-13 23:38 ` [PATCH] x86/tools/relocs: Add _etext and __end_of_kernel_reserve to S_REL Arvind Sankar
2020-01-10 20:56 ` Kees Cook
[not found] ` <CAEQFVGa4fksPRtiLtBckSgbJY_JSHr07hoy5+5w-pAYym16YVg@mail.gmail.com>
2020-01-11 19:40 ` Fwd: " Mauro Rossi
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