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