linux-hardening - Re: [PATCH v4 4/6] binfmt_elf: Use elf

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Message-ID: <CAKbZUD1ojuNN_+x6gkxEMsmLOd5KbCs-wfJcMM==b8+k8_uD_w@mail.gmail.com>
Date: Fri, 29 Sep 2023 13:12:13 +0100
From: Pedro Falcato <pedro.falcato@...il.com>
To: Kees Cook <keescook@...omium.org>
Cc: Eric Biederman <ebiederm@...ssion.com>, Alexander Viro <viro@...iv.linux.org.uk>, 
	Christian Brauner <brauner@...nel.org>, linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, 
	Sebastian Ott <sebott@...hat.com>, Thomas Weißschuh <linux@...ssschuh.net>, 
	Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, 
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH v4 4/6] binfmt_elf: Use elf_load() for library

On Fri, Sep 29, 2023 at 4:24 AM Kees Cook <keescook@...omium.org> wrote:
>
> While load_elf_library() is a libc5-ism, we can still replace most of
> its contents with elf_load() as well, further simplifying the code.

While I understand you want to break as little as possible (as the ELF
loader maintainer), I'm wondering if we could axe CONFIG_USELIB
altogether? Since CONFIG_BINFMT_AOUT also got axed. Does this have
users anywhere?

-- 
Pedro