IPv6: fix Mobile IPv6 regression

Commit f4f914b5 (net: ipv6 bind to device issue) caused
a regression with Mobile IPv6 when it changed the meaning
of fl->oif to become a strict requirement of the route
lookup.  Instead, only force strict mode when
sk->sk_bound_dev_if is set on the calling socket, getting
the intended behavior and fixing the regression.

Tested-by: Arnaud Ebalard <[email protected]>
Signed-off-by: Brian Haley <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 294cbe8b0725f7ad9f58690f2b511829d391a672..252d76199c41e7589b85416bef1145e407239126 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -814,7 +814,7 @@ struct dst_entry * ip6_route_output(struct net *net, struct sock *sk,
 {
        int flags = 0;
 
-       if (fl->oif || rt6_need_strict(&fl->fl6_dst))
+       if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl->fl6_dst))
                flags |= RT6_LOOKUP_F_IFACE;
 
        if (!ipv6_addr_any(&fl->fl6_src))