4.19-stable review patch. If anyone has any objections, please let me know.
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From: David Ahern dsahern@gmail.com
[ 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 --- net/mpls/af_mpls.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/net/mpls/af_mpls.c +++ b/net/mpls/af_mpls.c @@ -1822,6 +1822,9 @@ static int rtm_to_route_config(struct sk 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,