1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 8737400af0a0..8659067da28e 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -700,7 +700,7 @@ static netdev_tx_t reg_vif_xmit(struct sk_buff *skb,
         struct mr6_table *mrt;
         struct flowi6 fl6 = {
                 .flowi6_oif     = dev->ifindex,
-                .flowi6_iif     = skb->skb_iif,
+                .flowi6_iif     = skb->skb_iif ? : LOOPBACK_IFINDEX,
                 .flowi6_mark    = skb->mark,
         };
         int err;