1 files changed, 28 insertions, 14 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index f494675471a9..6ca32f6b3105 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1887,6 +1887,23 @@ void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
 EXPORT_SYMBOL(skb_set_dev);
 #endif /* CONFIG_NET_NS */
 
+static void skb_warn_bad_offload(const struct sk_buff *skb)
+{
+	static const netdev_features_t null_features = 0;
+	struct net_device *dev = skb->dev;
+	const char *driver = "";
+
+	if (dev && dev->dev.parent)
+		driver = dev_driver_string(dev->dev.parent);
+
+	WARN(1, "%s: caps=(%pNF, %pNF) len=%d data_len=%d gso_size=%d "
+	     "gso_type=%d ip_summed=%d\n",
+	     driver, 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);
+}
+
 /*
  * Invalidate hardware checksum when packet is to be mangled, and
  * complete checksum manually on outgoing path.
@@ -1900,8 +1917,8 @@ int skb_checksum_help(struct sk_buff *skb)
 		goto out_set_summed;
 
 	if (unlikely(skb_shinfo(skb)->gso_size)) {
-		/* Let GSO fix up the checksum. */
-		goto out_set_summed;
+		skb_warn_bad_offload(skb);
+		return -EINVAL;
 	}
 
 	offset = skb_checksum_start_offset(skb);
@@ -1961,16 +1978,7 @@ struct sk_buff *skb_gso_segment(struct sk_buff *skb,
 	__skb_pull(skb, skb->mac_len);
 
 	if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
-		struct net_device *dev = skb->dev;
-		struct ethtool_drvinfo info = {};
-
-		if (dev && dev->ethtool_ops && dev->ethtool_ops->get_drvinfo)
-			dev->ethtool_ops->get_drvinfo(dev, &info);
-
-		WARN(1, "%s: caps=(%pNF, %pNF) len=%d data_len=%d ip_summed=%d\n",
-		     info.driver, dev ? &dev->features : NULL,
-		     skb->sk ? &skb->sk->sk_route_caps : NULL,
-		     skb->len, skb->data_len, skb->ip_summed);
+		skb_warn_bad_offload(skb);
 
 		if (skb_header_cloned(skb) &&
 		    (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
@@ -3492,14 +3500,20 @@ static inline gro_result_t
 __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
 {
 	struct sk_buff *p;
+	unsigned int maclen = skb->dev->hard_header_len;
 
 	for (p = napi->gro_list; p; p = p->next) {
 		unsigned long diffs;
 
 		diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev;
 		diffs |= p->vlan_tci ^ skb->vlan_tci;
-		diffs |= compare_ether_header(skb_mac_header(p),
-					      skb_gro_mac_header(skb));
+		if (maclen == ETH_HLEN)
+			diffs |= compare_ether_header(skb_mac_header(p),
+						      skb_gro_mac_header(skb));
+		else if (!diffs)
+			diffs = memcmp(skb_mac_header(p),
+				       skb_gro_mac_header(skb),
+				       maclen);
 		NAPI_GRO_CB(p)->same_flow = !diffs;
 		NAPI_GRO_CB(p)->flush = 0;
 	}