From 1dfa76390bf056a49c1105b11f815a35a693b77c Mon Sep 17 00:00:00 2001 From: David Ahern Date: Fri, 11 Aug 2017 17:11:15 -0700 Subject: [PATCH] net: ipv4: add check for l3slave for index returned in IP_PKTINFO Similar to the loopback device, for packets sent through a VRF device the index returned in ipi_ifindex needs to be the saved index in rt_iif. Signed-off-by: David Ahern Signed-off-by: David S. Miller --- net/ipv4/ip_sockglue.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index dd68a9ed5e40..e558e4f9597b 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -1207,6 +1207,7 @@ e_inval: void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb) { struct in_pktinfo *pktinfo = PKTINFO_SKB_CB(skb); + bool l3slave = ipv4_l3mdev_skb(IPCB(skb)->flags); bool prepare = (inet_sk(sk)->cmsg_flags & IP_CMSG_PKTINFO) || ipv6_sk_rxinfo(sk); @@ -1220,7 +1221,7 @@ void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb) * (e.g., process binds socket to eth0 for Tx which is * redirected to loopback in the rtable/dst). */ - if (pktinfo->ipi_ifindex == LOOPBACK_IFINDEX) + if (pktinfo->ipi_ifindex == LOOPBACK_IFINDEX || l3slave) pktinfo->ipi_ifindex = inet_iif(skb); pktinfo->ipi_spec_dst.s_addr = fib_compute_spec_dst(skb); -- 2.20.1