> > Consider a daemon which runs in a chroot jail. The files and directories 
> > in the jail are made immutable. Say that the daemon is exploited and the
> > attacker gains root privileges. How will he program the DMA controller
> > of the video card if there is no /dev/xf86 in the chroot jail? But if
> > you compile the kernel with option INSECURE, he will be able to inset
> > the immutable flag on directories and make any device node he wants.
> 
> He can't touch any directory he wants, because he's in a chroot jail. :)

He can make new device nodes if he wants, no?

Pavel