net: fix wrong skb_get() usage / crash in IGMP/MLD parsing code

[cascardo/linux.git] / net / bridge / br_multicast.c

diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 0b39dcc..1285eaf 100644 (file)
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1591,7 +1591,7 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
                break;
        }
 
-       if (skb_trimmed)
+       if (skb_trimmed && skb_trimmed != skb)
                kfree_skb(skb_trimmed);
 
        return err;
@@ -1636,7 +1636,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
                break;
        }
 
-       if (skb_trimmed)
+       if (skb_trimmed && skb_trimmed != skb)
                kfree_skb(skb_trimmed);
 
        return err;