[PATCH 4.14 030/135] mpls: Return error for RTA_GATEWAY attribute

From: Greg Kroah-Hartman
Date: Tue Mar 12 2019 - 13:43:33 EST

4.14-stable review patch. If anyone has any objections, please let me know.


From: David Ahern <dsahern@xxxxxxxxx>

[ Upstream commit be48220edd48ca0d569782992840488a52373a24 ]

MPLS does not support nexthops with an MPLS address family.
Specifically, it does not handle RTA_GATEWAY attribute. Make it
clear by returning an error.

Fixes: 03c0566542f4c ("mpls: Netlink commands to add, remove, and dump routes")
Signed-off-by: David Ahern <dsahern@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
net/mpls/af_mpls.c | 3 +++
1 file changed, 3 insertions(+)

--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -1787,6 +1787,9 @@ static int rtm_to_route_config(struct sk
goto errout;
+ NL_SET_ERR_MSG(extack, "MPLS does not support RTA_GATEWAY attribute");
+ goto errout;
case RTA_VIA:
if (nla_get_via(nla, &cfg->rc_via_alen,