1 files changed, 20 insertions, 4 deletions

diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 9dc3b5f26e8..8f6a302d2ac 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -86,6 +86,11 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
         struct sk_buff *skb = rx->skb;
         struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+        int queue = rx->queue;
+
+        /* otherwise, TKIP is vulnerable to TID 0 vs. non-QoS replays */
+        if (rx->queue == NUM_RX_DATA_QUEUES - 1)
+                queue = 0;
 
         /*
          * it makes no sense to check for MIC errors on anything other
@@ -148,13 +153,19 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
 
 update_iv:
         /* update IV in key information to be able to detect replays */
-        rx->key->u.tkip.rx[rx->queue].iv32 = rx->tkip_iv32;
-        rx->key->u.tkip.rx[rx->queue].iv16 = rx->tkip_iv16;
+        rx->key->u.tkip.rx[queue].iv32 = rx->tkip_iv32;
+        rx->key->u.tkip.rx[queue].iv16 = rx->tkip_iv16;
 
         return RX_CONTINUE;
 
 mic_fail:
-        mac80211_ev_michael_mic_failure(rx->sdata, rx->key->conf.keyidx,
+        /*
+         * In some cases the key can be unset - e.g. a multicast packet, in
+         * a driver that supports HW encryption. Send up the key idx only if
+         * the key is set.
+         */
+        mac80211_ev_michael_mic_failure(rx->sdata,
+                                        rx->key ? rx->key->conf.keyidx : -1,
                                         (void *) skb->data, NULL, GFP_ATOMIC);
         return RX_DROP_UNUSABLE;
 }
@@ -235,6 +246,11 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
         struct ieee80211_key *key = rx->key;
         struct sk_buff *skb = rx->skb;
         struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
+        int queue = rx->queue;
+
+        /* otherwise, TKIP is vulnerable to TID 0 vs. non-QoS replays */
+        if (rx->queue == NUM_RX_DATA_QUEUES - 1)
+                queue = 0;
 
         hdrlen = ieee80211_hdrlen(hdr->frame_control);
 
@@ -255,7 +271,7 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
         res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm,
                                           key, skb->data + hdrlen,
                                           skb->len - hdrlen, rx->sta->sta.addr,
-                                          hdr->addr1, hwaccel, rx->queue,
+                                          hdr->addr1, hwaccel, queue,
                                           &rx->tkip_iv32,
                                           &rx->tkip_iv16);
         if (res != TKIP_DECRYPT_OK)