l2tp: Fix oops in pppol2tp_xmit

[pandora-kernel.git] / drivers / net / pppol2tp.c

diff --git a/drivers/net/pppol2tp.c b/drivers/net/pppol2tp.c
index 9fbb2eb..5861ee9 100644 (file)
--- a/drivers/net/pppol2tp.c
+++ b/drivers/net/pppol2tp.c
@@ -1180,7 +1180,8 @@ static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
        /* Calculate UDP checksum if configured to do so */
        if (sk_tun->sk_no_check == UDP_CSUM_NOXMIT)
                skb->ip_summed = CHECKSUM_NONE;
-       else if (!(skb_dst(skb)->dev->features & NETIF_F_V4_CSUM)) {
+       else if ((skb_dst(skb) && skb_dst(skb)->dev) &&
+                (!(skb_dst(skb)->dev->features & NETIF_F_V4_CSUM))) {
                skb->ip_summed = CHECKSUM_COMPLETE;
                csum = skb_checksum(skb, 0, udp_len, 0);
                uh->check = csum_tcpudp_magic(inet->inet_saddr,