1 files changed, 5 insertions, 1 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 9ac6ca2521c3..8b67ca07467d 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)