diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2011-05-12 15:11:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-03 10:33:49 +0900 |
| commit | 4eb0c775fbb6af5d34681f9a8a68aed7c837fd2e (patch) | |
| tree | 06ee9c1666a53c763be95024a83c6fc0c4a510a5 | |
| parent | 8a2b75b1bc777133e2d70e560e5e49bc1b536b36 (diff) | |
mac80211: fix a few RCU issues
commit a3836e02ba4c50db958d32d710b226f2408623dc upstream.
A few configuration functions correctly do
rcu_read_lock() but don't correctly reference
some pointers protected by RCU. Fix that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/mac80211/cfg.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 40f7357c269..c35dcf79a52 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -228,11 +228,11 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev, goto out; if (pairwise) - key = sta->ptk; + key = rcu_dereference(sta->ptk); else if (key_idx < NUM_DEFAULT_KEYS) - key = sta->gtk[key_idx]; + key = rcu_dereference(sta->gtk[key_idx]); } else - key = sdata->keys[key_idx]; + key = rcu_dereference(sdata->keys[key_idx]); if (!key) goto out; @@ -904,8 +904,10 @@ static int ieee80211_change_mpath(struct wiphy *wiphy, static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop, struct mpath_info *pinfo) { - if (mpath->next_hop) - memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN); + struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop); + + if (next_hop_sta) + memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN); else memset(next_hop, 0, ETH_ALEN); |