net: Preserve netfilter attributes in skb_gso_segment using __copy_skb_header

skb_gso_segment didn't preserve some attributes in the original skb
such as the netfilter fields.  This was harmless until they were used
which is the case for packets going through lo.

This patch makes it call __copy_skb_header which also picks up some
other missing attributes.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 84640172d65d7901387925d49654de4b0ddb41e7..ca1ccdf1ef7612b87d16f53f803b2460de612360 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -2256,14 +2256,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
                        segs = nskb;
                tail = nskb;
 
-               nskb->dev = skb->dev;
-               skb_copy_queue_mapping(nskb, skb);
-               nskb->priority = skb->priority;
-               nskb->protocol = skb->protocol;
-               nskb->vlan_tci = skb->vlan_tci;
-               nskb->dst = dst_clone(skb->dst);
-               memcpy(nskb->cb, skb->cb, sizeof(skb->cb));
-               nskb->pkt_type = skb->pkt_type;
+               __copy_skb_header(nskb, skb);
                nskb->mac_len = skb->mac_len;
 
                skb_reserve(nskb, headroom);
@@ -2274,6 +2267,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
                skb_copy_from_linear_data(skb, skb_put(nskb, doffset),
                                          doffset);
                if (!sg) {
+                       nskb->ip_summed = CHECKSUM_NONE;
                        nskb->csum = skb_copy_and_csum_bits(skb, offset,
                                                            skb_put(nskb, len),
                                                            len, 0);
@@ -2283,8 +2277,6 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
                frag = skb_shinfo(nskb)->frags;
                k = 0;
 
-               nskb->ip_summed = CHECKSUM_PARTIAL;
-               nskb->csum = skb->csum;
                skb_copy_from_linear_data_offset(skb, offset,
                                                 skb_put(nskb, hsize), hsize);