See bug #151240 for patch and POC... also affects FC2
+++ This bug was initially created as a clone of Bug #151240 +++
Ben Martel and Stephen Blackheath discovered a DoS 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.