netdev - Re: [PATCH] USB: disable all RNDIS protocol drivers

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Date: Tue, 4 Jul 2023 07:47:31 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Enrico Mioso <mrkiko.rs@...il.com>
Cc: Jan Engelhardt <jengelh@...i.de>, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Kalle Valo <kvalo@...nel.org>,
	Oleksij Rempel <linux@...pel-privat.de>,
	Maciej Żenczykowski <maze@...gle.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Andrzej Pietrasiewicz <andrzejtp2010@...il.com>,
	Jacopo Mondi <jacopo@...ndi.org>,
	Łukasz Stelmach <l.stelmach@...sung.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	linux-usb@...r.kernel.org, netdev@...r.kernel.org,
	linux-wireless@...r.kernel.org,
	Ilja Van Sprundel <ivansprundel@...ctive.com>,
	Joseph Tartaro <joseph.tartaro@...ctive.com>
Subject: Re: [PATCH] USB: disable all RNDIS protocol drivers

On Mon, Jul 03, 2023 at 11:11:57PM +0200, Enrico Mioso wrote:
> Hi all!!
> 
> I think the rndis_host USB driver might emit a warning in the dmesg, but disabling the driver wouldn't be a good idea.
> The TP-Link MR6400 V1 LTE modem and also some ZTE modems integrated in routers do use this protocol.
> 
> We may also distinguish between these cases and devices you might plug in - as they pose different risk levels.

Again, you have to fully trust the other side of an RNDIS connection,
any hints on how to have the kernel determine that?

thanks,

greg k-h