Alan Cox wrote:
>
> Ar Mer, 2006-08-09 am 10:41 +0200, ysgrifennodd Edgar Toernig:
> > > If I own the file I can make it a symlink to a pty/tty pair
> > > I can revoke a pty/tty pair
> >
> > With the EIO/EOF behaviour that's not a problem - apps that deal
> > with ttys have to expect that condition.
>
> Think about it a moment - I can symlink any file to a tty/pty pair so
> any file I own you open might be a tty.
Yes, OK. The EIO/EOF behaviour is fine. Even for regular files it's
not something extraordinary.
> > Hmm... which apps have an open fd on block devices? Usually a
>
> cdrecord, cd audio players, eject, ....
And killing them is not OK? "fuser -km /dev/cdrom" already covers both
cases, mounted somewhere and opened for special access.
Sorry if I sound a little bit anal. IMO, a generic revoke is a pretty
sharp sword which is given to ordinary users and I have a very uneasy
feeling. They can dig in the innards of other people's processes - a
clean headshot by root is something different ...
Ciao, ET.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
