[PATCH 4.19 35/93] ipv6: Default fib6_type to RTN_UNICAST when not set

[Greg Kroah-Hartman]

From: David Ahern <dsahern@xxxxxxxxx>

[ Upstream commit c7036d97acd2527cef145b5ef9ad1a37ed21bbe6 ]

A user reported that routes are getting installed with type 0 (RTN_UNSPEC)
where before the routes were RTN_UNICAST. One example is from accel-ppp
which apparently still uses the ioctl interface and does not set
rtmsg_type. Another is the netlink interface where ipv6 does not require
rtm_type to be set (v4 does). Prior to the commit in the Fixes tag the
ipv6 stack converted type 0 to RTN_UNICAST, so restore that behavior.

Fixes: e8478e80e5a7 ("net/ipv6: Save route type in rt6_info")
Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ipv6/route.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -3109,7 +3109,7 @@ static struct fib6_info *ip6_route_info_
 	rt->fib6_metric = cfg->fc_metric;
 	rt->fib6_nh.nh_weight = 1;
 
-	rt->fib6_type = cfg->fc_type;
+	rt->fib6_type = cfg->fc_type ? : RTN_UNICAST;
 
 	/* We cannot add true routes via loopback here,
 	   they would result in kernel looping; promote them to reject routes