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Message-ID: <20170104204704.GA17642@kroah.com>
Date: Wed, 4 Jan 2017 21:47:04 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Matthew Garrett <mjg59@...eos.com>
Cc: Kees Cook <keescook@...omium.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
Ulf Hansson <ulf.hansson@...aro.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Tomeu Vizoso <tomeu.vizoso@...labora.com>,
Lukas Wunner <lukas@...ner.de>,
Madalin Bucur <madalin.bucur@....com>,
Sudip Mukherjee <sudipm.mukherjee@...il.com>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Arnd Bergmann <arnd@...db.de>,
Andrew Morton <akpm@...ux-foundation.org>,
Russell King <rmk+kernel@....linux.org.uk>,
Petr Tesarik <ptesarik@...e.com>, linux-pm@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH] Allow userspace control of runtime disabling/enabling of
driver probing
On Wed, Jan 04, 2017 at 02:01:00PM -0600, Matthew Garrett wrote:
> On Wed, Jan 4, 2017 at 1:47 PM, Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> > You know the device type and vendor/product id before you authorize it,
> > you should be able to do this type of detection otherwise it seems
> > pretty pointless :)
>
> You know the vendor and product ID, which doesn't tell you whether one
> of the endpoints is a network device or a keyboard. You need to know
> that.
Are you sure you don't have the configuration information as well? That
should tell you...
And for network devices, they are almost all just vendor/product ids,
not many use the class protocol.
thanks,
greg k-h
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