wan/hdlc_x25.c: fix a NULL dereference
WAN: fixes a NULL dereference in hdlc_x25.
Reported-by: Adrian Bunk <bunk@kernel.org>.
Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/wan/hdlc_x25.c b/drivers/net/wan/hdlc_x25.c
index 8b7e5d2..cbcbf6f 100644
--- a/drivers/net/wan/hdlc_x25.c
+++ b/drivers/net/wan/hdlc_x25.c
@@ -163,15 +163,17 @@
static int x25_rx(struct sk_buff *skb)
{
+ struct net_device *dev = skb->dev;
+
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
- skb->dev->stats.rx_dropped++;
+ dev->stats.rx_dropped++;
return NET_RX_DROP;
}
- if (lapb_data_received(skb->dev, skb) == LAPB_OK)
+ if (lapb_data_received(dev, skb) == LAPB_OK)
return NET_RX_SUCCESS;
- skb->dev->stats.rx_errors++;
+ dev->stats.rx_errors++;
dev_kfree_skb_any(skb);
return NET_RX_DROP;
}