Page fault after destroying/reconfiguring GRE interface

[Julian Kornberger]

Hi Andrey,

I compiled and installed a new Kernel with your patch, but is does not 
help. It seems as if the crash only occurs if I have two GRE interfaces 
and I destroy the second one (gre1). If I destroy the first one (gre0), 
it does not crash:

gre0 with 10.9.0.13 -> 10.9.0.12
gre1 with 10.9.0.15 -> 10.9.0.14 (destroyed)

Kind Regards
Julian Kornberger