On Thu, May 01, 2014 at 04:00:49PM -0700, Andy Lutomirski wrote: > On Thu, May 1, 2014 at 3:34 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote: > > On Thu, May 01, 2014 at 03:20:00PM -0700, Andy Lutomirski wrote: > >> Is it supposed to work? > > > > Why the hell not? Same as opening a device node on r/o filesystem for > > write, or doing the same with FIFO. > > You can't bind a socket on a read-only fs, so I thought it was a fair question. > > I'll write a patch to add MS_NOIPCCONNECT and MNT_NOIPCCONNECT to > block connect on unix sockets and open on fifos. This will be useful > for sandboxes that want to prevent sandboxed programs from accessing > undesirable parts of the outside world. Sigh... Don't expose those FIFOs et.al. to them, then. mount --bind /dev/null <pathname> as part of setting the sucker up. And if you *are* blindly exposing the host filesystems to them wholesale, sockets and fifos are the least of your problems, even if you do that read-only. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
