Re: UUIDs (and devfs and major/minor numbers)

Dan Hollis (goemon@sasami.anime.net)
Fri, 18 Jun 1999 18:00:12 -0700 (PDT)


On 18 Jun 1999, david parsons wrote:
> In a paranoid case (you're running a multiuser machine and you
> know the world is out to get you, you certainly don't want new
> devices to spring into life singing "Yoo hoo, sailors! I'm
> Available!", so you set up the system to default new permissions
> to nobody can touch them.

Indeed there are tricks that can be done with devfs eg each user could
only see their devices in their namespace and noone elses. This would
close some possible denial of service schemes

Also the kernel could handle resetting permissions and ownership on
devices based on end-user defined rules. Thus closing some security holes
due to timing attacks

-Dan

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