ipv4: return valid RTA_IIF on ip route get

Extend commit 13378cad02afc2adc6c0e07fca03903c7ada0b37
("ipv4: Change rt->rt_iif encoding.") from 3.6 to return valid
RTA_IIF on 'ip route get ... iif DEVICE' instead of rt_iif 0
which is displayed as 'iif *'.

inet_iif is not appropriate to use because skb_iif is not set.
Use the skb->dev->ifindex instead.

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/ipv4/route.c b/net/ipv4/route.c
index 34d094cadb11..20a59c388e6e 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2357,7 +2357,7 @@ static int rt_fill_info(struct net *net,  __be32 dst, __be32 src,
                         }
                 } else
 #endif
-                        if (nla_put_u32(skb, RTA_IIF, rt->rt_iif))
+                        if (nla_put_u32(skb, RTA_IIF, skb->dev->ifindex))
                                 goto nla_put_failure;
         }