On Wed, 2019-07-24 at 20:36 +0800, Jia-Ju Bai wrote: > In ieee80211_setup_sdata(), there is an if statement on line 1410 to > check whether sdata->dev is NULL: > if (sdata->dev) > > When sdata->dev is NULL, it is used on lines 1458 and 1459: > sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP; > sdata->dev->netdev_ops = &ieee80211_monitorif_ops; > > Thus, possible null-pointer dereferences may occur. No, this cannot happen, monitor interfaces (NL80211_IFTYPE_MONITOR) must have a valid ->dev, only P2P device and NAN might not. johannes
