linux-kernel - Re: [PATCH v5 next 0/5] Improve Module autoloading infrastructure

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Message-ID: <CA+55aFxcte0puN32cV25p8Ex2PKzb3mug-OzpzWWw1EvY35=AA@mail.gmail.com>
Date:   Mon, 27 Nov 2017 11:12:59 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Djalal Harouni <tixxdz@...il.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Andy Lutomirski <luto@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        James Morris <james.l.morris@...cle.com>,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        Solar Designer <solar@...nwall.com>,
        Serge Hallyn <serge@...lyn.com>, Jessica Yu <jeyu@...nel.org>,
        Rusty Russell <rusty@...tcorp.com.au>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        LSM List <linux-security-module@...r.kernel.org>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        Jonathan Corbet <corbet@....net>,
        Ingo Molnar <mingo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Network Development <netdev@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v5 next 0/5] Improve Module autoloading infrastructure

On Mon, Nov 27, 2017 at 11:02 AM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> Now, the above will not necessarily work with a legacy /dev/ directory
> where al the nodes have been pre-populated, and opening the device
> node is supposed to load the module. So _historically_ we did indeed
> load modules as normal users. But does that really happen any more?

Sadly, it looks like bluetoothd actually does expect to load the
bt-proto-XYZ modules with no capabilities at all.

So apparently we really do depend on not needing capabilities for
module loading.

Oh well.

                 Linus