> It is, I guess a fix should go in net/rtsock.c to prevent adding "-link"
> entry on routing table different from ifp->if_rdomain.
>
I came up with this, which is more radical.
Index: route.c
===================================================================
RCS file: /cvs/src/sys/net/route.c,v
retrieving revision 1.397
diff -u -p -r1.397 route.c
--- route.c 29 Oct 2020 21:15:27 -0000 1.397
+++ route.c 27 Nov 2020 09:39:53 -0000
@@ -865,6 +865,8 @@ rtrequest(int req, struct rt_addrinfo *i
return (EINVAL);
ifa = info->rti_ifa;
ifp = ifa->ifa_ifp;
+ if (tableid != ifp->if_rdomain)
+ return (EINVAL);
if (prio == 0)
prio = ifp->if_priority + RTP_STATIC;
