net: ipv6: more places need LOOPBACK_IFINDEX for flowi6_iif

To properly match iif in ip rules we have to provide
LOOPBACK_IFINDEX in flowi6_iif, not 0. Some ip6mr_fib_lookup
and fib6_rule_lookup callers need such fix.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 8659067da28e..8250474ab7dc 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1633,7 +1633,7 @@ struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
 {
         struct mr6_table *mrt;
         struct flowi6 fl6 = {
-                .flowi6_iif     = skb->skb_iif,
+                .flowi6_iif     = skb->skb_iif ? : LOOPBACK_IFINDEX,
                 .flowi6_oif     = skb->dev->ifindex,
                 .flowi6_mark    = skb->mark,
         };