linux-kernel - Re: USB devices on Dell TB16 dock stop working after resuming

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Message-ID: <CA+CmpXubOwsradq=ObUF-h6WBpRF3tDx9TqaUO8TeJDqvdeGPg@mail.gmail.com>
Date:   Wed, 20 Nov 2019 19:16:58 +0200
From:   Yehezkel Bernat <yehezkelshb@...il.com>
To:     Mario Limonciello <Mario.Limonciello@...l.com>
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        pmenzel@...gen.mpg.de, Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>, ck@...om.net,
        LKML <linux-kernel@...r.kernel.org>,
        Anthony Wong <anthony.wong@...onical.com>
Subject: Re: USB devices on Dell TB16 dock stop working after resuming

On Wed, Nov 20, 2019 at 7:06 PM <Mario.Limonciello@...l.com> wrote:
>
>
> But I mean this is generally an unsafe (but convenient) option, it means that you
> throw out security pre-boot, and all someone needs to do is turn off your machine,
> plug in a malicious device, turn it on and then they have malicious device all the way
> into OS.

Only if the attacker found how to forge the device UUID (and knew what UUIDs
are allowed), isn't it? Unless you take into account things like
external GPU box,
where it's pretty easy to replace the card installed inside it.