From: David Ahern <dsahern@gmail.com>
Date: Tue, 26 Feb 2019 17:00:04 +0000 (-0800)
Subject: mpls: Return error for RTA_GATEWAY attribute
X-Git-Tag: rel_imx_4.19.35_1.1.0~6124
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=4f3221dee1e1230555cbf24c2d5907f470b5e10e;p=linux.git

mpls: Return error for RTA_GATEWAY attribute

[ 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@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 8fbe6cdbe255..d5a4db5b3fe7 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -1822,6 +1822,9 @@ 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,