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 */