From 31680ac265802397937d75461a2809a067b9fb93 Mon Sep 17 00:00:00 2001 From: David Ahern Date: Wed, 22 May 2019 15:12:18 -0700 Subject: [PATCH] ipv6: Fix redirect with VRF IPv6 redirect is broken for VRF. __ip6_route_redirect walks the FIB entries looking for an exact match on ifindex. With VRF the flowi6_oif is updated by l3mdev_update_flow to the l3mdev index and the FLOWI_FLAG_SKIP_NH_OIF set in the flags to tell the lookup to skip the device match. For redirects the device match is requires so use that flag to know when the oif needs to be reset to the skb device index. Fixes: ca254490c8df ("net: Add VRF support to IPv6 stack") Signed-off-by: David Ahern Signed-off-by: David S. Miller --- net/ipv6/route.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 7a014ca877ed..848e944f07df 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2512,6 +2512,12 @@ static struct rt6_info *__ip6_route_redirect(struct net *net, struct fib6_info *rt; struct fib6_node *fn; + /* l3mdev_update_flow overrides oif if the device is enslaved; in + * this case we must match on the real ingress device, so reset it + */ + if (fl6->flowi6_flags & FLOWI_FLAG_SKIP_NH_OIF) + fl6->flowi6_oif = skb->dev->ifindex; + /* Get the "current" route for this destination and * check if the redirect has come from appropriate router. * -- 2.39.5