Merge branch 'upstream-fixes'

[linux-2.6] / net / ieee80211 / ieee80211_rx.c

diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
index 7a121802faa92d7aa33b07734d8c6a0f3165662e..960aa78cdb972e1662bde851d7b025c61502f0fe 100644 (file)
--- a/net/ieee80211/ieee80211_rx.c
+++ b/net/ieee80211/ieee80211_rx.c
@@ -350,6 +350,7 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
        u8 src[ETH_ALEN];
        struct ieee80211_crypt_data *crypt = NULL;
        int keyidx = 0;
+       int can_be_decrypted = 0;
 
        hdr = (struct ieee80211_hdr_4addr *)skb->data;
        stats = &ieee->stats;
@@ -410,12 +411,23 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
                return 1;
        }
 
-       if (is_multicast_ether_addr(hdr->addr1)
-           ? ieee->host_mc_decrypt : ieee->host_decrypt) {
+       can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
+                           is_broadcast_ether_addr(hdr->addr2)) ?
+           ieee->host_mc_decrypt : ieee->host_decrypt;
+
+       if (can_be_decrypted) {
                int idx = 0;
-               if (skb->len >= hdrlen + 3)
+               if (skb->len >= hdrlen + 3) {
+                       /* Top two-bits of byte 3 are the key index */
                        idx = skb->data[hdrlen + 3] >> 6;
+               }
+
+               /* ieee->crypt[] is WEP_KEY (4) in length.  Given that idx
+                * is only allowed 2-bits of storage, no value of idx can
+                * be provided via above code that would result in idx
+                * being out of range */
                crypt = ieee->crypt[idx];
+
 #ifdef NOT_YET
                sta = NULL;
 
@@ -553,7 +565,7 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 
        /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 
-       if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
+       if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
            (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
                goto rx_dropped;
 
@@ -617,7 +629,7 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 
        /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
         * encrypted/authenticated */
-       if (ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
+       if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
            ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
                goto rx_dropped;
 
@@ -1439,7 +1451,7 @@ void ieee80211_rx_mgt(struct ieee80211_device *ieee,
                break;
 
        case IEEE80211_STYPE_PROBE_REQ:
-               IEEE80211_DEBUG_MGMT("recieved auth (%d)\n",
+               IEEE80211_DEBUG_MGMT("received auth (%d)\n",
                                     WLAN_FC_GET_STYPE(le16_to_cpu
                                                       (header->frame_ctl)));
 
@@ -1473,7 +1485,7 @@ void ieee80211_rx_mgt(struct ieee80211_device *ieee,
                break;
        case IEEE80211_STYPE_AUTH:
 
-               IEEE80211_DEBUG_MGMT("recieved auth (%d)\n",
+               IEEE80211_DEBUG_MGMT("received auth (%d)\n",
                                     WLAN_FC_GET_STYPE(le16_to_cpu
                                                       (header->frame_ctl)));