1 files changed, 2 insertions, 0 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index d5f7716662db..c5fc85286ef6 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1023,6 +1023,8 @@ struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
                 return ERR_PTR(err);
         if (final_dst)
                 fl6->daddr = *final_dst;
+        if (!fl6->flowi6_oif)
+                fl6->flowi6_oif = dst->dev->ifindex;
 
         return xfrm_lookup_route(sock_net(sk), dst, flowi6_to_flowi(fl6), sk, 0);
 }