Re: [PATCH 1/1] net: check dev->reg_state before deref of napi netdev_ops

2018-03-12 Thread Josh Elsasser
On Mon, Mar 12, 2018 at 4:17 PM, Cong Wang wrote: > On Sun, Mar 11, 2018 at 12:22 PM, Josh Elsasser 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->

Re: [PATCH 1/1] net: check dev->reg_state before deref of napi netdev_ops

2018-03-12 Thread Cong Wang
On Sun, Mar 11, 2018 at 12:22 PM, Josh Elsasser 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 th

[PATCH 1/1] net: check dev->reg_state before deref of napi netdev_ops

2018-03-11 Thread Josh Elsasser
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'