mac80211: further RCU fixes

There were a few more instances of sta_info_get calls not being
protected by RCU, fix them.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index 69aed16faff3..5a452575719d 100644
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -980,6 +980,8 @@ static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev
         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
         struct sta_info *sta = NULL;
 
+        rcu_read_lock();
+
         if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
             sdata->vif.type == IEEE80211_IF_TYPE_IBSS)
                 sta = sta_info_get(local, sdata->u.sta.bssid);
@@ -996,6 +998,9 @@ static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev
                 wstats->qual.noise = sta->last_noise;
                 wstats->qual.updated = local->wstats_flags;
         }
+
+        rcu_read_unlock();
+
         return wstats;
 }