linux-kernel - Re: Can we move device drivers into user-space?

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Message-ID: <CABDyM6RdnY0OHcWauS124nXVpPj_8pOLVd6gcaLbTgCHBoQang@mail.gmail.com>
Date:	Sat, 25 Feb 2012 10:31:54 -0500
From:	Richard Yao <ryao@...stonybrook.edu>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
CC:	Jidong Xiao <jidong.xiao@...il.com>, <david@...g.hm>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: Can we move device drivers into user-space?

> The impact of the bug won't also reduce, on most cases, as the userspace driver
> will very likely require root capabilities.

This is incorrect. root capabilities can be isolated via security
frameworks like SELinux. Ring 0 code cannot.
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