mpls: Return error for RTA_GATEWAY attribute

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: 03c0566 ("mpls: Netlink commands to add, remove, and dump routes") Signed-off-by: David Ahern <[email protected]> Signed-off-by: David S. Miller <[email protected]>
tprrt · Feb 26, 2019 · be48220 · be48220
1 parent e381854
commit be48220
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
@@ -1838,6 +1838,9 @@ static int rtm_to_route_config(struct sk_buff *skb,
 				goto errout;
 			break;
 		}
+		case RTA_GATEWAY:
+			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,