ieee802154: 6lowpan: fix non-lowpan wpan interfaces

We receive all 802.15.4 frames on the packet handler "lowpan_rcv" this
patch checks if the wpan device belongs to a lowpan interface.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c
index d6f5e8e..12e1020 100644 (file)
--- a/net/ieee802154/6lowpan/rx.c
+++ b/net/ieee802154/6lowpan/rx.c
@@ -67,6 +67,10 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
        struct ieee802154_hdr hdr;
        int ret;
 
+       if (dev->type != ARPHRD_IEEE802154 ||
+           !dev->ieee802154_ptr->lowpan_dev)
+               goto drop;
+
        skb = skb_share_check(skb, GFP_ATOMIC);
        if (!skb)
                goto drop;
@@ -77,9 +81,6 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
        if (skb->pkt_type == PACKET_OTHERHOST)
                goto drop_skb;
 
-       if (dev->type != ARPHRD_IEEE802154)
-               goto drop_skb;
-
        if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0)
                goto drop_skb;