1 files changed, 7 insertions, 1 deletions

diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 939fc01371d..376b4cc6ca8 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -1124,8 +1124,14 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
 
         spin_unlock_bh(&orig_node->bcast_seqno_lock);
 
+        /* keep skb linear for crc calculation */
+        if (skb_linearize(skb) < 0)
+                goto out;
+
+        bcast_packet = (struct batadv_bcast_packet *)skb->data;
+
         /* check whether this has been sent by another originator before */
-        if (batadv_bla_check_bcast_duplist(bat_priv, bcast_packet, hdr_size))
+        if (batadv_bla_check_bcast_duplist(bat_priv, bcast_packet, skb->len))
                 goto out;
 
         /* rebroadcast packet */