On Sun, Mar 11, 2018 at 12:22 PM, Josh Elsasser <jelsas...@appneta.com> wrote: > init_dummy_netdev() leaves its netdev_ops pointer zeroed. This leads > to a NULL pointer dereference when sk_busy_loop fires against an iwlwifi > wireless adapter and checks napi->dev->netdev_ops->ndo_busy_poll. > > Avoid this by ensuring that napi->dev is not a dummy device before > dereferencing napi dev's netdev_ops, preventing the following panic:
Hmm, how about just checking ->netdev_ops? Checking reg_state looks odd, although works.
