Martin Schulze writes:

> Ben Martel and Stephen Blackheath have discovered a denial-of-service attack
> that a client of pppd can make that can hang the server machine.  The bug is
> in the Linux kernel 2.6 (tested on 2.6.9), but it looks like it also exists
> in the 2.4 series.

Yes, this is my bug. :(

I would just do this instead:
Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>