diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 9ac6ca2521c32fba05dd4c99e9f8e68bbf762c32..4e9a2fe2f12cf4e62cc4b1cc9b9c2e3768252e08 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -621,7 +621,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 	 * or if the skb it not generated by a local socket.  (This last
 	 * check should be redundant, but it's free.)
 	 */
-	if (!np || np->pmtudisc >= IPV6_PMTUDISC_DO) {
+	if (skb->local_df) {
 		skb->dev = skb->dst->dev;
 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);
 		IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_FRAGFAILS);
@@ -1420,6 +1420,10 @@ int ip6_push_pending_frames(struct sock *sk)
 		tmp_skb->sk = NULL;
 	}
 
+	/* Allow local fragmentation. */
+	if (np->pmtudisc >= IPV6_PMTUDISC_DO)
+		skb->local_df = 1;
+
 	ipv6_addr_copy(final_dst, &fl->fl6_dst);
 	__skb_pull(skb, skb_network_header_len(skb));
 	if (opt && opt->opt_flen)
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index b34c58c656563851f25b548a84b82742beb72a1d..79ccfb080733d77e52831ce5dd832302856fc5be 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -36,7 +36,7 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
 	if (mtu < IPV6_MIN_MTU)
 		mtu = IPV6_MIN_MTU;
 
-	if (skb->len > mtu) {
+	if (!skb->local_df && skb->len > mtu) {
 		skb->dev = dst->dev;
 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);
 		ret = -EMSGSIZE;