2 files changed, 29 insertions, 9 deletions

diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
index 7a121802faa9..960aa78cdb97 100644
--- 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)));
 
diff --git a/net/ieee80211/ieee80211_wx.c b/net/ieee80211/ieee80211_wx.c
index 23e1630f50b7..f87c6b89f845 100644
--- a/net/ieee80211/ieee80211_wx.c
+++ b/net/ieee80211/ieee80211_wx.c
@@ -232,15 +232,18 @@ static char *ipw2100_translate_scan(struct ieee80211_device *ieee,
         return start;
 }
 
+#define SCAN_ITEM_SIZE 128
+
 int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
                           struct iw_request_info *info,
                           union iwreq_data *wrqu, char *extra)
 {
         struct ieee80211_network *network;
         unsigned long flags;
+        int err = 0;
 
         char *ev = extra;
-        char *stop = ev + IW_SCAN_MAX_DATA;
+        char *stop = ev + wrqu->data.length;
         int i = 0;
 
         IEEE80211_DEBUG_WX("Getting scan\n");
@@ -249,6 +252,11 @@ int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 
         list_for_each_entry(network, &ieee->network_list, list) {
                 i++;
+                if (stop - ev < SCAN_ITEM_SIZE) {
+                        err = -E2BIG;
+                        break;
+                }
+
                 if (ieee->scan_age == 0 ||
                     time_after(network->last_scanned + ieee->scan_age, jiffies))
                         ev = ipw2100_translate_scan(ieee, ev, stop, network);
@@ -270,7 +278,7 @@ int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
 
         IEEE80211_DEBUG_WX("exit: %d networks returned.\n", i);
 
-        return 0;
+        return err;
 }
 
 int ieee80211_wx_set_encode(struct ieee80211_device *ieee,