---

yaml --- r: 340536 b: refs/heads/master c: b8fcfa4 h: refs/heads/master v: v3
git-mirror · Oct 29, 2012 · e93660d · e93660d
1 parent 8aedd61
commit e93660d
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Showing 2 changed files with 7 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 60c39c7584e1bb69cdce4e0a9ee1e78ba09c82b9
+refs/heads/master: b8fcfa42e4ec5d55d4cccd5c728415e8bca0539d
diff --git a/trunk/net/batman-adv/routing.c b/trunk/net/batman-adv/routing.c
@@ -908,8 +908,12 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
 	bool tt_poss_change;
 	int is_old_ttvn;
 
-	/* I could need to modify it */
-	if (skb_cow(skb, sizeof(struct batadv_unicast_packet)) < 0)
+	/* check if there is enough data before accessing it */
+	if (pskb_may_pull(skb, sizeof(*unicast_packet) + ETH_HLEN) < 0)
+		return 0;
+
+	/* create a copy of the skb (in case of for re-routing) to modify it. */
+	if (skb_cow(skb, sizeof(*unicast_packet)) < 0)
 		return 0;
 
 	unicast_packet = (struct batadv_unicast_packet *)skb->data;