Re: silent semantic changes with reiser4

Christoph Hellwig
2004-08-26T16:13:03Z

On Thu, Aug 26, 2004 at 05:06:38PM +0100, Jamie Lokier wrote:
> Christoph Hellwig wrote:
> > > There's bound to be some security issue, but I'm not sure what you're
> > > getting at with /tmp. What sort of sort of security problem arises
> > > with a world-writeable directory such as /tmp, that cannot arise with
> > > the standard fs semantics?
> >
> > Actually you are right on that issue because it would open the
> > device/fifo as directory and not device/fifo (in fact I'd had to look at
> > the code again to see whether they actually do this only for files or
> > also for special files)
>
> Are you saying that with reiser4, you can open a device or fifo with
> O_DIRECTORY?

That's what I thought, but as far as I can follow the code this is not
actually true.