[NET]: Add missing skb_share_check() calls to econet/bpqether/lapbether/ipconfig.

drivers/net/hamradio/bpqether.c

@@ -175,6 +175,9 @@ static int bpq_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_ty
 	struct ethhdr *eth;
 	struct bpqdev *bpq;
 
+	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
+		return NET_RX_DROP;
+
 	if (!pskb_may_pull(skb, sizeof(struct ethhdr)))
 		goto drop;
 

drivers/net/wan/lapbether.c

@@ -89,6 +89,9 @@ static int lapbeth_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
 	int len, err;
 	struct lapbethdev *lapbeth;
 
+	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
+		return NET_RX_DROP;
+
 	if (!pskb_may_pull(skb, 2))
 		goto drop;
 

net/econet/af_econet.c

@@ -1015,16 +1015,17 @@ static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet
 	struct sock *sk;
 	struct ec_device *edev = dev->ec_ptr;
 
-	if (!edev) {
-		kfree_skb(skb);
-		return 0;
-	}
+	if (skb->pkt_type == PACKET_OTHERHOST)
+		goto drop;
 
-	if (!pskb_may_pull(skb, sizeof(struct ec_framehdr))) {
-		/* Frame is too small to be any use */
-		kfree_skb(skb);
-		return 0;
-	}
+	if (!edev)
+		goto drop;
+
+	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
+		return NET_RX_DROP;
+
+	if (!pskb_may_pull(skb, sizeof(struct ec_framehdr)))
+		goto drop;
 
 	hdr = (struct ec_framehdr *) skb->data;
 
@@ -1037,13 +1038,15 @@ static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet
 	}
 
 	sk = ec_listening_socket(hdr->port, hdr->src_stn, hdr->src_net);
-	if (!sk) {
-		kfree_skb(skb);
-		return 0;
-	}
+	if (!sk)
+		goto drop;
 
 	return ec_queue_packet(sk, skb, edev->net, hdr->src_stn, hdr->cb, 
 			       hdr->port);
+
+drop:
+	kfree_skb(skb);
+	return 0;
 }
 
 static struct packet_type econet_packet_type = {

net/ipv4/ipconfig.c

@@ -415,6 +415,9 @@ ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 	unsigned char *sha, *tha;		/* s for "source", t for "target" */
 	struct ic_device *d;
 
+	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
+		return NET_RX_DROP;
+
 	if (!pskb_may_pull(skb, sizeof(arphdr)))
 		goto drop;
 
@@ -823,6 +826,9 @@ static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, str
 	if (skb->pkt_type == PACKET_OTHERHOST)
 		goto drop;
 
+	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
+		return NET_RX_DROP;
+
 	if (!pskb_may_pull(skb,
 			   sizeof(struct iphdr) +
 			   sizeof(struct udphdr)))