static void skb_warn_bad_offload(const struct sk_buff *skb)
{
	static const netdev_features_t null_features;
	struct net_device *dev = skb->dev;
	const char *name = "";

	if (!net_ratelimit())
		return;

	if (dev) {
		if (dev->dev.parent)
			name = dev_driver_string(dev->dev.parent);
		else
			name = netdev_name(dev);
	}
	WARN(1, "%s: caps=(%pNF, %pNF) len=%d data_len=%d gso_size=%d "
	     "gso_type=%d ip_summed=%d\n",
	     name, dev ? &dev->features : &null_features,
	     skb->sk ? &skb->sk->sk_route_caps : &null_features,
	     skb->len, skb->data_len, skb_shinfo(skb)->gso_size,
	     skb_shinfo(skb)->gso_type, skb->ip_summed);
}

The product dereferences a pointer that it expects to be valid but is NULL.