[IEEE80211]: avoid integer underflow for runt rx frames

[linux-2.6-omap-h63xx.git] / net / ieee80211 / ieee80211_rx.c

diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
index f2de2e48b021cc960417cd330f8e9a72a648cc5c..6284c99b456eeb7fc992ffd9063d28d609fdce0f 100644 (file)
--- a/net/ieee80211/ieee80211_rx.c
+++ b/net/ieee80211/ieee80211_rx.c
@@ -366,6 +366,12 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
        frag = WLAN_GET_SEQ_FRAG(sc);
        hdrlen = ieee80211_get_hdrlen(fc);
 
+       if (skb->len < hdrlen) {
+               printk(KERN_INFO "%s: invalid SKB length %d\n",
+                       dev->name, skb->len);
+               goto rx_dropped;
+       }
+
        /* Put this code here so that we avoid duplicating it in all
         * Rx paths. - Jean II */
 #ifdef CONFIG_WIRELESS_EXT