16 files changed, 118 insertions, 74 deletions

diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c
index 0c9d0c07eae6..9c0d76cdca92 100644
--- a/net/mac80211/agg-rx.c
+++ b/net/mac80211/agg-rx.c
@@ -63,7 +63,8 @@ void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
 
         lockdep_assert_held(&sta->ampdu_mlme.mtx);
 
-        tid_rx = sta->ampdu_mlme.tid_rx[tid];
+        tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid],
+                                        lockdep_is_held(&sta->ampdu_mlme.mtx));
 
         if (!tid_rx)
                 return;
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index f614ee602089..cd5125f77cc5 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -157,16 +157,19 @@ int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
                                     bool tx)
 {
         struct ieee80211_local *local = sta->local;
-        struct tid_ampdu_tx *tid_tx = sta->ampdu_mlme.tid_tx[tid];
+        struct tid_ampdu_tx *tid_tx;
         int ret;
 
         lockdep_assert_held(&sta->ampdu_mlme.mtx);
 
-        if (!tid_tx)
-                return -ENOENT;
-
         spin_lock_bh(&sta->lock);
 
+        tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+        if (!tid_tx) {
+                spin_unlock_bh(&sta->lock);
+                return -ENOENT;
+        }
+
         if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
                 /* not even started yet! */
                 ieee80211_assign_tid_tx(sta, tid, NULL);
@@ -291,13 +294,13 @@ ieee80211_wake_queue_agg(struct ieee80211_local *local, int tid)
 
 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
 {
-        struct tid_ampdu_tx *tid_tx = sta->ampdu_mlme.tid_tx[tid];
+        struct tid_ampdu_tx *tid_tx;
         struct ieee80211_local *local = sta->local;
         struct ieee80211_sub_if_data *sdata = sta->sdata;
         u16 start_seq_num;
         int ret;
 
-        lockdep_assert_held(&sta->ampdu_mlme.mtx);
+        tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
 
         /*
          * While we're asking the driver about the aggregation,
@@ -404,7 +407,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
                 goto err_unlock_sta;
         }
 
-        tid_tx = sta->ampdu_mlme.tid_tx[tid];
+        tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
         /* check if the TID is not in aggregation flow already */
         if (tid_tx || sta->ampdu_mlme.tid_start_tx[tid]) {
 #ifdef CONFIG_MAC80211_HT_DEBUG
@@ -491,16 +494,19 @@ ieee80211_agg_splice_finish(struct ieee80211_local *local, u16 tid)
 static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
                                          struct sta_info *sta, u16 tid)
 {
+        struct tid_ampdu_tx *tid_tx;
+
         lockdep_assert_held(&sta->ampdu_mlme.mtx);
 
+        tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+
 #ifdef CONFIG_MAC80211_HT_DEBUG
         printk(KERN_DEBUG "Aggregation is on for tid %d\n", tid);
 #endif
 
         drv_ampdu_action(local, sta->sdata,
                          IEEE80211_AMPDU_TX_OPERATIONAL,
-                         &sta->sta, tid, NULL,
-                         sta->ampdu_mlme.tid_tx[tid]->buf_size);
+                         &sta->sta, tid, NULL, tid_tx->buf_size);
 
         /*
          * synchronize with TX path, while splicing the TX path
@@ -508,13 +514,13 @@ static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
          */
         spin_lock_bh(&sta->lock);
 
-        ieee80211_agg_splice_packets(local, sta->ampdu_mlme.tid_tx[tid], tid);
+        ieee80211_agg_splice_packets(local, tid_tx, tid);
         /*
          * Now mark as operational. This will be visible
          * in the TX path, and lets it go lock-free in
          * the common case.
          */
-        set_bit(HT_AGG_STATE_OPERATIONAL, &sta->ampdu_mlme.tid_tx[tid]->state);
+        set_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state);
         ieee80211_agg_splice_finish(local, tid);
 
         spin_unlock_bh(&sta->lock);
@@ -548,7 +554,7 @@ void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
         }
 
         mutex_lock(&sta->ampdu_mlme.mtx);
-        tid_tx = sta->ampdu_mlme.tid_tx[tid];
+        tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
 
         if (WARN_ON(!tid_tx)) {
 #ifdef CONFIG_MAC80211_HT_DEBUG
@@ -626,7 +632,7 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
                 return -EINVAL;
 
         spin_lock_bh(&sta->lock);
-        tid_tx = sta->ampdu_mlme.tid_tx[tid];
+        tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
 
         if (!tid_tx) {
                 ret = -ENOENT;
@@ -682,7 +688,7 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
 
         mutex_lock(&sta->ampdu_mlme.mtx);
         spin_lock_bh(&sta->lock);
-        tid_tx = sta->ampdu_mlme.tid_tx[tid];
+        tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
 
         if (!tid_tx || !test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
 #ifdef CONFIG_MAC80211_HT_DEBUG
@@ -763,7 +769,7 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
 
         mutex_lock(&sta->ampdu_mlme.mtx);
 
-        tid_tx = sta->ampdu_mlme.tid_tx[tid];
+        tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
         if (!tid_tx)
                 goto out;
 
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 2d1c1a5f3c51..6ecd5862735d 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -177,11 +177,11 @@ static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
                         goto out_unlock;
 
                 if (pairwise)
-                        key = sta->ptk;
+                        key = key_mtx_dereference(local, sta->ptk);
                 else
-                        key = sta->gtk[key_idx];
+                        key = key_mtx_dereference(local, sta->gtk[key_idx]);
         } else
-                key = sdata->keys[key_idx];
+                key = key_mtx_dereference(local, sdata->keys[key_idx]);
 
         if (!key) {
                 ret = -ENOENT;
@@ -463,7 +463,7 @@ static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
         int size;
         int err = -EINVAL;
 
-        old = sdata->u.ap.beacon;
+        old = rtnl_dereference(sdata->u.ap.beacon);
 
         /* head must not be zero-length */
         if (params->head && !params->head_len)
@@ -558,8 +558,7 @@ static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
 
         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
-        old = sdata->u.ap.beacon;
-
+        old = rtnl_dereference(sdata->u.ap.beacon);
         if (old)
                 return -EALREADY;
 
@@ -574,8 +573,7 @@ static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
 
         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
-        old = sdata->u.ap.beacon;
-
+        old = rtnl_dereference(sdata->u.ap.beacon);
         if (!old)
                 return -ENOENT;
 
@@ -589,8 +587,7 @@ static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
 
         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
-        old = sdata->u.ap.beacon;
-
+        old = rtnl_dereference(sdata->u.ap.beacon);
         if (!old)
                 return -ENOENT;
 
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
index f7ef3477c24a..33c58b85c911 100644
--- a/net/mac80211/debugfs_key.c
+++ b/net/mac80211/debugfs_key.c
@@ -241,16 +241,12 @@ void ieee80211_debugfs_key_add(struct ieee80211_key *key)
         if (!key->debugfs.dir)
                 return;
 
-        rcu_read_lock();
-        sta = rcu_dereference(key->sta);
-        if (sta)
+        sta = key->sta;
+        if (sta) {
                 sprintf(buf, "../../stations/%pM", sta->sta.addr);
-        rcu_read_unlock();
-
-        /* using sta as a boolean is fine outside RCU lock */
-        if (sta)
                 key->debugfs.stalink =
                         debugfs_create_symlink("station", key->debugfs.dir, buf);
+        }
 
         DEBUGFS_ADD(keylen);
         DEBUGFS_ADD(flags);
@@ -286,7 +282,8 @@ void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
         lockdep_assert_held(&sdata->local->key_mtx);
 
         if (sdata->default_unicast_key) {
-                key = sdata->default_unicast_key;
+                key = key_mtx_dereference(sdata->local,
+                                          sdata->default_unicast_key);
                 sprintf(buf, "../keys/%d", key->debugfs.cnt);
                 sdata->debugfs.default_unicast_key =
                         debugfs_create_symlink("default_unicast_key",
@@ -297,7 +294,8 @@ void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
         }
 
         if (sdata->default_multicast_key) {
-                key = sdata->default_multicast_key;
+                key = key_mtx_dereference(sdata->local,
+                                          sdata->default_multicast_key);
                 sprintf(buf, "../keys/%d", key->debugfs.cnt);
                 sdata->debugfs.default_multicast_key =
                         debugfs_create_symlink("default_multicast_key",
@@ -316,9 +314,8 @@ void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
         if (!sdata->debugfs.dir)
                 return;
 
-        /* this is running under the key lock */
-
-        key = sdata->default_mgmt_key;
+        key = key_mtx_dereference(sdata->local,
+                                  sdata->default_mgmt_key);
         if (key) {
                 sprintf(buf, "../keys/%d", key->debugfs.cnt);
                 sdata->debugfs.default_mgmt_key =
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index 9f5842a43111..591add22bcc0 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -160,7 +160,7 @@ void ieee80211_ba_session_work(struct work_struct *work)
                         continue;
                 }
 
-                tid_tx = sta->ampdu_mlme.tid_tx[tid];
+                tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
                 if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
                                                  &tid_tx->state))
                         ___ieee80211_stop_tx_ba_session(sta, tid,
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index b81860c94698..421eaa6b0c2b 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -662,12 +662,16 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
         int tx_last_beacon, len = req->len;
         struct sk_buff *skb;
         struct ieee80211_mgmt *resp;
+        struct sk_buff *presp;
         u8 *pos, *end;
 
         lockdep_assert_held(&ifibss->mtx);
 
+        presp = rcu_dereference_protected(ifibss->presp,
+                                          lockdep_is_held(&ifibss->mtx));
+
         if (ifibss->state != IEEE80211_IBSS_MLME_JOINED ||
-            len < 24 + 2 || !ifibss->presp)
+            len < 24 + 2 || !presp)
                 return;
 
         tx_last_beacon = drv_tx_last_beacon(local);
@@ -705,7 +709,7 @@ static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
         }
 
         /* Reply with ProbeResp */
-        skb = skb_copy(ifibss->presp, GFP_KERNEL);
+        skb = skb_copy(presp, GFP_KERNEL);
         if (!skb)
                 return;
 
@@ -985,7 +989,8 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 
         /* remove beacon */
         kfree(sdata->u.ibss.ie);
-        skb = sdata->u.ibss.presp;
+        skb = rcu_dereference_protected(sdata->u.ibss.presp,
+                                        lockdep_is_held(&sdata->u.ibss.mtx));
         rcu_assign_pointer(sdata->u.ibss.presp, NULL);
         sdata->vif.bss_conf.ibss_joined = false;
         ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 82f90ff8bb18..ed755889645d 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -214,7 +214,7 @@ struct beacon_data {
 };
 
 struct ieee80211_if_ap {
-        struct beacon_data *beacon;
+        struct beacon_data __rcu *beacon;
 
         struct list_head vlans;
 
@@ -237,7 +237,7 @@ struct ieee80211_if_vlan {
         struct list_head list;
 
         /* used for all tx if the VLAN is configured to 4-addr mode */
-        struct sta_info *sta;
+        struct sta_info __rcu *sta;
 };
 
 struct mesh_stats {
@@ -442,7 +442,8 @@ struct ieee80211_if_ibss {
 
         unsigned long ibss_join_req;
         /* probe response/beacon for IBSS */
-        struct sk_buff *presp, *skb;
+        struct sk_buff __rcu *presp;
+        struct sk_buff *skb;
 
         enum {
                 IEEE80211_IBSS_MLME_SEARCH,
@@ -567,9 +568,10 @@ struct ieee80211_sub_if_data {
         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
         unsigned int fragment_next;
 
-        struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
-        struct ieee80211_key *default_unicast_key, *default_multicast_key;
-        struct ieee80211_key *default_mgmt_key;
+        struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
+        struct ieee80211_key __rcu *default_unicast_key;
+        struct ieee80211_key __rcu *default_multicast_key;
+        struct ieee80211_key __rcu *default_mgmt_key;
 
         u16 sequence_number;
         __be16 control_port_protocol;
@@ -805,7 +807,7 @@ struct ieee80211_local {
         spinlock_t sta_lock;
         unsigned long num_sta;
         struct list_head sta_list, sta_pending_list;
-        struct sta_info *sta_hash[STA_HASH_SIZE];
+        struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
         struct timer_list sta_cleanup;
         struct work_struct sta_finish_work;
         int sta_generation;
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 4054399be907..0d00ac93d958 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -449,7 +449,8 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
         /* APs need special treatment */
         if (sdata->vif.type == NL80211_IFTYPE_AP) {
                 struct ieee80211_sub_if_data *vlan, *tmpsdata;
-                struct beacon_data *old_beacon = sdata->u.ap.beacon;
+                struct beacon_data *old_beacon =
+                        rtnl_dereference(sdata->u.ap.beacon);
 
                 /* sdata_running will return false, so this will disable */
                 ieee80211_bss_info_change_notify(sdata,
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 958832dd4f0a..31afd712930d 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -195,7 +195,7 @@ static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata,
         assert_key_lock(sdata->local);
 
         if (idx >= 0 && idx < NUM_DEFAULT_KEYS)
-                key = sdata->keys[idx];
+                key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
 
         if (uni)
                 rcu_assign_pointer(sdata->default_unicast_key, key);
@@ -222,7 +222,7 @@ __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx)
 
         if (idx >= NUM_DEFAULT_KEYS &&
             idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
-                key = sdata->keys[idx];
+                key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
 
         rcu_assign_pointer(sdata->default_mgmt_key, key);
 
@@ -266,9 +266,15 @@ static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata,
                 else
                         idx = new->conf.keyidx;
 
-                defunikey = old && sdata->default_unicast_key == old;
-                defmultikey = old && sdata->default_multicast_key == old;
-                defmgmtkey = old && sdata->default_mgmt_key == old;
+                defunikey = old &&
+                        old == key_mtx_dereference(sdata->local,
+                                                sdata->default_unicast_key);
+                defmultikey = old &&
+                        old == key_mtx_dereference(sdata->local,
+                                                sdata->default_multicast_key);
+                defmgmtkey = old &&
+                        old == key_mtx_dereference(sdata->local,
+                                                sdata->default_mgmt_key);
 
                 if (defunikey && !new)
                         __ieee80211_set_default_key(sdata, -1, true, false);
@@ -451,11 +457,11 @@ int ieee80211_key_link(struct ieee80211_key *key,
         mutex_lock(&sdata->local->key_mtx);
 
         if (sta && pairwise)
-                old_key = sta->ptk;
+                old_key = key_mtx_dereference(sdata->local, sta->ptk);
         else if (sta)
-                old_key = sta->gtk[idx];
+                old_key = key_mtx_dereference(sdata->local, sta->gtk[idx]);
         else
-                old_key = sdata->keys[idx];
+                old_key = key_mtx_dereference(sdata->local, sdata->keys[idx]);
 
         __ieee80211_key_replace(sdata, sta, pairwise, old_key, key);
         __ieee80211_key_destroy(old_key);
diff --git a/net/mac80211/key.h b/net/mac80211/key.h
index e5432ef8b203..d801d5351336 100644
--- a/net/mac80211/key.h
+++ b/net/mac80211/key.h
@@ -146,4 +146,7 @@ void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata);
 void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
 void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata);
 
+#define key_mtx_dereference(local, ref) \
+        rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
+
 #endif /* IEEE80211_KEY_H */
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 79a2281678bf..0d7b08db8e56 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -871,8 +871,10 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
          * and we need some headroom for passing the frame to monitor
          * interfaces, but never both at the same time.
          */
+#ifndef __CHECKER__
         BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
                         sizeof(struct ieee80211_tx_status_rtap_hdr));
+#endif
         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
 
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 5c0c20389a1a..e7c5fddb4804 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -92,7 +92,7 @@ struct mesh_path {
         u8 dst[ETH_ALEN];
         u8 mpp[ETH_ALEN];       /* used for MPP or MAP */
         struct ieee80211_sub_if_data *sdata;
-        struct sta_info *next_hop;
+        struct sta_info __rcu *next_hop;
         struct timer_list timer;
         struct sk_buff_head frame_queue;
         struct rcu_head rcu;
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 2aec7c4f357b..2b18053070c1 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -560,6 +560,14 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
 }
 
 
+static inline struct sta_info *
+next_hop_deref_protected(struct mesh_path *mpath)
+{
+        return rcu_dereference_protected(mpath->next_hop,
+                                         lockdep_is_held(&mpath->state_lock));
+}
+
+
 static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
                                     struct ieee80211_mgmt *mgmt,
                                     u8 *prep_elem, u32 metric)
@@ -599,7 +607,7 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
                 spin_unlock_bh(&mpath->state_lock);
                 goto fail;
         }
-        memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
+        memcpy(next_hop, next_hop_deref_protected(mpath)->sta.addr, ETH_ALEN);
         spin_unlock_bh(&mpath->state_lock);
         --ttl;
         flags = PREP_IE_FLAGS(prep_elem);
@@ -651,7 +659,8 @@ static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
         if (mpath) {
                 spin_lock_bh(&mpath->state_lock);
                 if (mpath->flags & MESH_PATH_ACTIVE &&
-                    memcmp(ta, mpath->next_hop->sta.addr, ETH_ALEN) == 0 &&
+                    memcmp(ta, next_hop_deref_protected(mpath)->sta.addr,
+                                                        ETH_ALEN) == 0 &&
                     (!(mpath->flags & MESH_PATH_SN_VALID) ||
                     SN_GT(target_sn, mpath->sn))) {
                         mpath->flags &= ~MESH_PATH_ACTIVE;
@@ -913,6 +922,7 @@ int mesh_nexthop_lookup(struct sk_buff *skb,
 {
         struct sk_buff *skb_to_free = NULL;
         struct mesh_path *mpath;
+        struct sta_info *next_hop;
         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
         u8 *target_addr = hdr->addr3;
         int err = 0;
@@ -940,7 +950,11 @@ int mesh_nexthop_lookup(struct sk_buff *skb,
                         mesh_queue_preq(mpath,
                                         PREQ_Q_F_START | PREQ_Q_F_REFRESH);
                 }
-                memcpy(hdr->addr1, mpath->next_hop->sta.addr, ETH_ALEN);
+                next_hop = rcu_dereference(mpath->next_hop);
+                if (next_hop)
+                        memcpy(hdr->addr1, next_hop->sta.addr, ETH_ALEN);
+                else
+                        err = -ENOENT;
         } else {
                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
                 if (!(mpath->flags & MESH_PATH_RESOLVING)) {
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index cba8309e9ace..82ab6b4643fc 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -67,7 +67,8 @@ static int sta_info_hash_del(struct ieee80211_local *local,
 {
         struct sta_info *s;
 
-        s = local->sta_hash[STA_HASH(sta->sta.addr)];
+        s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)],
+                                      lockdep_is_held(&local->sta_lock));
         if (!s)
                 return -ENOENT;
         if (s == sta) {
@@ -76,9 +77,11 @@ static int sta_info_hash_del(struct ieee80211_local *local,
                 return 0;
         }
 
-        while (s->hnext && s->hnext != sta)
-                s = s->hnext;
-        if (s->hnext) {
+        while (rcu_access_pointer(s->hnext) &&
+               rcu_access_pointer(s->hnext) != sta)
+                s = rcu_dereference_protected(s->hnext,
+                                        lockdep_is_held(&local->sta_lock));
+        if (rcu_access_pointer(s->hnext)) {
                 rcu_assign_pointer(s->hnext, sta->hnext);
                 return 0;
         }
@@ -654,9 +657,9 @@ static int __must_check __sta_info_destroy(struct sta_info *sta)
 
         mutex_lock(&local->key_mtx);
         for (i = 0; i < NUM_DEFAULT_KEYS; i++)
-                __ieee80211_key_free(sta->gtk[i]);
+                __ieee80211_key_free(key_mtx_dereference(local, sta->gtk[i]));
         if (sta->ptk)
-                __ieee80211_key_free(sta->ptk);
+                __ieee80211_key_free(key_mtx_dereference(local, sta->ptk));
         mutex_unlock(&local->key_mtx);
 
         sta->dead = true;
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 55c51855ceb7..d6b566076f05 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -164,11 +164,11 @@ struct tid_ampdu_rx {
 struct sta_ampdu_mlme {
         struct mutex mtx;
         /* rx */
-        struct tid_ampdu_rx *tid_rx[STA_TID_NUM];
+        struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM];
         unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)];
         /* tx */
         struct work_struct work;
-        struct tid_ampdu_tx *tid_tx[STA_TID_NUM];
+        struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM];
         struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM];
         u8 addba_req_num[STA_TID_NUM];
         u8 dialog_token_allocator;
@@ -243,11 +243,11 @@ struct sta_ampdu_mlme {
 struct sta_info {
         /* General information, mostly static */
         struct list_head list;
-        struct sta_info *hnext;
+        struct sta_info __rcu *hnext;
         struct ieee80211_local *local;
         struct ieee80211_sub_if_data *sdata;
-        struct ieee80211_key *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
-        struct ieee80211_key *ptk;
+        struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
+        struct ieee80211_key __rcu *ptk;
         struct rate_control_ref *rate_ctrl;
         void *rate_ctrl_priv;
         spinlock_t lock;
@@ -403,6 +403,13 @@ static inline u32 get_sta_flags(struct sta_info *sta)
 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
                              struct tid_ampdu_tx *tid_tx);
 
+static inline struct tid_ampdu_tx *
+rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
+{
+        return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
+                                         lockdep_is_held(&sta->lock) ||
+                                         lockdep_is_held(&sta->ampdu_mlme.mtx));
+}
 
 #define STA_HASH_SIZE 256
 #define STA_HASH(sta) (sta[5])
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index c9f12113ca6a..6eeaaa2bbafe 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1147,7 +1147,7 @@ static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
                  *     packet pass through because splicing the frames
                  *     back is already done.
                  */
-                tid_tx = tx->sta->ampdu_mlme.tid_tx[tid];
+                tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
 
                 if (!tid_tx) {
                         /* do nothing, let packet pass through */