linux-kernel - Re: [PATCH] a.out: Stop building a.out/osf1 support on alpha and m68k

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Message-ID: <202203091358.775E158C@keescook>
Date:   Wed, 9 Mar 2022 14:02:42 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Borislav Petkov <bp@...en8.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Theodore Ts'o <tytso@....edu>, X86 ML <x86@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Matt Turner <mattst88@...il.com>,
        Måns Rullgård <mans@...sr.com>,
        Michael Cree <mcree@...on.net.nz>,
        linux-arch <linux-arch@...r.kernel.org>,
        Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>
Subject: Re: [PATCH] a.out: Stop building a.out/osf1 support on alpha and m68k

On Wed, Mar 09, 2022 at 12:37:54PM -0800, Linus Torvalds wrote:
> On Wed, Mar 9, 2022 at 12:04 PM Eric W. Biederman <ebiederm@...ssion.com> wrote:
> >
> > Let's see if anyone cares about a.out support on the last two
> > architectures that build it, by disabling the build of the support in
> > Kconfig.
> [...]
> But sure, it would be interesting to know if any alpha people care - I
> just have this suspicion that we can't drop it that easily because of
> the non-Linux legacy.

It looks like the only distro supporting Alpha is Gentoo. I pulled
down the installation media, and everything is ELF except for firmware
COFF files:

$ find . -type f | xargs file | grep -Ei ':.*(out|coff)'
./lib/firmware/meson/vdec/g12a_hevc_mmu.bin: MIPSEB MIPS-III ECOFF executable not stripped - version 0.0
./lib/firmware/meson/vdec/g12a_vp9.bin: MIPSEB MIPS-III ECOFF executable not stripped - version 0.0
./lib/firmware/meson/vdec/gxl_hevc_mmu.bin: MIPSEB MIPS-III ECOFF executable not stripped - version 0.0
./lib/firmware/meson/vdec/gxl_vp9.bin: MIPSEB MIPS-III ECOFF executable not stripped - version 0.0
./lib/firmware/meson/vdec/sm1_hevc_mmu.bin: MIPSEB MIPS-III ECOFF executable not stripped - version 0.0
./lib/firmware/meson/vdec/sm1_vp9_mmu.bin: MIPSEB MIPS-III ECOFF executable not stripped - version 0.0
./lib/firmware/qca/crbtfw32.tlv: mc68k COFF object not stripped

So, since it's an easy revert, sure. Let's do it.

-- 
Kees Cook