1 files changed, 15 insertions, 8 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index b7ca461..d99fdc6 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -210,7 +210,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 				kfree_skb(skb);
 				return -ENOBUFS;
 			}
-			kfree_skb(skb);
+			consume_skb(skb);
 			skb = skb2;
 			skb_set_owner_w(skb, sk);
 		}
@@ -252,8 +252,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 			       dst->dev, dst_output);
 	}
 
-	if (net_ratelimit())
-		printk(KERN_DEBUG "IPv6: sending pkt_too_big to self\n");
+	net_dbg_ratelimited("IPv6: sending pkt_too_big to self\n");
 	skb->dev = dst->dev;
 	icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
 	IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_FRAGFAILS);
@@ -644,7 +643,10 @@ int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 	/* We must not fragment if the socket is set to force MTU discovery
 	 * or if the skb it not generated by a local socket.
 	 */
-	if (!skb->local_df && skb->len > mtu) {
+	if (unlikely(!skb->local_df && skb->len > mtu)) {
+		if (skb->sk && dst_allfrag(skb_dst(skb)))
+			sk_nocaps_add(skb->sk, NETIF_F_GSO_MASK);
+
 		skb->dev = skb_dst(skb)->dev;
 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
 		IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
@@ -789,6 +791,10 @@ slow_path_clean:
 	}
 
 slow_path:
+	if ((skb->ip_summed == CHECKSUM_PARTIAL) &&
+	    skb_checksum_help(skb))
+		goto fail;
+
 	left = skb->len - hlen;		/* Space per frame */
 	ptr = hlen;			/* Where to start from */
 
@@ -889,7 +895,7 @@ slow_path:
 	}
 	IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 		      IPSTATS_MIB_FRAGOKS);
-	kfree_skb(skb);
+	consume_skb(skb);
 	return err;
 
 fail:
@@ -1199,7 +1205,6 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 	int copy;
 	int err;
 	int offset = 0;
-	int csummode = CHECKSUM_NONE;
 	__u8 tx_flags = 0;
 
 	if (flags&MSG_PROBE)
@@ -1412,7 +1417,7 @@ alloc_new_skb:
 			/*
 			 *	Fill in the control structures
 			 */
-			skb->ip_summed = csummode;
+			skb->ip_summed = CHECKSUM_NONE;
 			skb->csum = 0;
 			/* reserve for fragmentation and ipsec header */
 			skb_reserve(skb, hh_len + sizeof(struct frag_hdr) +
@@ -1455,7 +1460,6 @@ alloc_new_skb:
 			transhdrlen = 0;
 			exthdrlen = 0;
 			dst_exthdrlen = 0;
-			csummode = CHECKSUM_NONE;
 
 			/*
 			 * Put the packet on the pending queue
@@ -1535,6 +1539,7 @@ error:
 	IP6_INC_STATS(sock_net(sk), rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 	return err;
 }
+EXPORT_SYMBOL_GPL(ip6_append_data);
 
 static void ip6_cork_release(struct inet_sock *inet, struct ipv6_pinfo *np)
 {
@@ -1638,6 +1643,7 @@ error:
 	IP6_INC_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS);
 	goto out;
 }
+EXPORT_SYMBOL_GPL(ip6_push_pending_frames);
 
 void ip6_flush_pending_frames(struct sock *sk)
 {
@@ -1652,3 +1658,4 @@ void ip6_flush_pending_frames(struct sock *sk)
 
 	ip6_cork_release(inet_sk(sk), inet6_sk(sk));
 }
+EXPORT_SYMBOL_GPL(ip6_flush_pending_frames);