From: Zhi Chen <[email protected]> Memory of tx_stats was allocated when a STA was added. But it's not freed if the STA failed to be added to driver. This issue could be seen in MDK3 attack case when STA number reached the limit.
Tested: QCA9984 with firmware ver 10.4-3.9.0.1-00005 Signed-off-by: Zhi Chen <[email protected]> --- drivers/net/wireless/ath/ath10k/mac.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 1db2a30..001cf31 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -6293,15 +6293,6 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, ar->num_stations + 1, ar->max_num_stations, ar->num_peers + 1, ar->max_num_peers); - if (ath10k_debug_is_extd_tx_stats_enabled(ar)) { - arsta->tx_stats = kzalloc(sizeof(*arsta->tx_stats), - GFP_KERNEL); - if (!arsta->tx_stats) { - ret = -ENOMEM; - goto exit; - } - } - num_tdls_stations = ath10k_mac_tdls_vif_stations_count(hw, vif); num_tdls_vifs = ath10k_mac_tdls_vifs_count(hw); @@ -6323,12 +6314,22 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, goto exit; } + if (ath10k_debug_is_extd_tx_stats_enabled(ar)) { + arsta->tx_stats = kzalloc(sizeof(*arsta->tx_stats), + GFP_KERNEL); + if (!arsta->tx_stats) { + ret = -ENOMEM; + goto exit; + } + } + ret = ath10k_peer_create(ar, vif, sta, arvif->vdev_id, sta->addr, peer_type); if (ret) { ath10k_warn(ar, "failed to add peer %pM for vdev %d when adding a new sta: %i\n", sta->addr, arvif->vdev_id, ret); ath10k_mac_dec_num_stations(arvif, sta); + kfree(arsta->tx_stats); goto exit; } @@ -6341,6 +6342,7 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, spin_unlock_bh(&ar->data_lock); ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); + kfree(arsta->tx_stats); ret = -ENOENT; goto exit; } @@ -6361,6 +6363,7 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); + kfree(arsta->tx_stats); goto exit; } @@ -6372,6 +6375,7 @@ static int ath10k_sta_state(struct ieee80211_hw *hw, sta->addr, arvif->vdev_id, ret); ath10k_peer_delete(ar, arvif->vdev_id, sta->addr); ath10k_mac_dec_num_stations(arvif, sta); + kfree(arsta->tx_stats); if (num_tdls_stations != 0) goto exit; -- 2.7.4 _______________________________________________ ath10k mailing list [email protected] http://lists.infradead.org/mailman/listinfo/ath10k
