From: Lorenzo Bianconi
Date: Fri, 27 Jul 2018 18:15:46 +0200
> Remove BUG_ON() from fib_compute_spec_dst routine and check
> in_dev pointer during flowi4 data structure initialization.
> fib_compute_spec_dst routine can be run concurrently with device removal
> where ip_ptr net_device pointer is
Remove BUG_ON() from fib_compute_spec_dst routine and check
in_dev pointer during flowi4 data structure initialization.
fib_compute_spec_dst routine can be run concurrently with device removal
where ip_ptr net_device pointer is set to NULL. This can happen
if userspace enables pkt info on UDP rx so
