From: Paolo Abeni <pab...@redhat.com>
Date: Tue, 5 Mar 2019 13:49:39 +0100
> If a non local multicast packet reaches ip_route_input_rcu() while
> the ingress device is NULL, we end up doing a NULL pointer
> dereference in IN_DEV_MFORWARD().
>
> Since the later call to ip_route_input_mc() is going to fail if
> !in_dev, we can fail early in such scenario and avoid the dangerous
> code path.
>
> Reported-by: Tianhao Zhao <tiz...@redhat.com>
> Fixes: e58e41596811 ("net: Enable support for VRF with ipv4 multicast")
> Signed-off-by: Paolo Abeni <pab...@redhat.com>
Please adjust your commit log message based upon David Ahern's feedback,
thank you.
