On Thu, Aug 26, 2004 at 02:48:12PM +0100, Jamie Lokier wrote: > > the current reiser4 semantics break that and as soon as you're having a > > world-writeable (e.g. /tmp) dir on it and someone is doing an opendir > > on it he's lost. > > How does the current reiser4 semantics break that? > > In a reiser4 filesystem, a file _is_ a directory. > opendir() is supposed to succeed on it. > > 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)
