lwtunnel: use kfree_skb() instead of vanilla kfree()

kfree_skb() is correct here.

Fixes: ffce419 ('lwtunnel: support dst output redirect function')
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Dan Carpenter

net/core/lwtunnel.c

@@ -205,7 +205,7 @@ int __lwtunnel_output(struct sock *sk, struct sk_buff *skb,
 	return ret;
 
 drop:
-	kfree(skb);
+	kfree_skb(skb);
 
 	return ret;
 }