tree cb094a4a577f61421d1b402e16f0e68f151d5726
parent b9a9ada14aab17f08c1d9735601f1097cdcfc6de
author Johannes Berg <johannes.berg@intel.com> 1354148720 +0100
committer Johannes Berg <johannes.berg@intel.com> 1354279340 +0100

cfg80211: fix BSS struct IE access races

When a BSS struct is updated, the IEs are currently
overwritten or freed. This can lead to races if some
other CPU is accessing the BSS struct and using the
IEs concurrently.

Fix this by always allocating the IEs in a new struct
that holds the data and length and protecting access
to this new struct with RCU.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>