[src/trunk]: src/sys/net Guard against the possibility the there is no ready ...

[roy <roy%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7cb6d7043021
branches:  trunk
changeset: 338785:7cb6d7043021
user:      roy <roy%NetBSD.org@localhost>
date:      Mon Jun 08 08:21:49 2015 +0000

description:
Guard against the possibility the there is no ready address.

diffstat:

 sys/net/route.c |  11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diffs (40 lines):

diff -r d2fe567bc501 -r 7cb6d7043021 sys/net/route.c
--- a/sys/net/route.c   Mon Jun 08 08:19:20 2015 +0000
+++ b/sys/net/route.c   Mon Jun 08 08:21:49 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: route.c,v 1.144 2015/04/30 09:57:38 ozaki-r Exp $      */
+/*     $NetBSD: route.c,v 1.145 2015/06/08 08:21:49 roy Exp $  */
 
 /*-
  * Copyright (c) 1998, 2008 The NetBSD Foundation, Inc.
@@ -94,7 +94,7 @@
 #include "opt_route.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: route.c,v 1.144 2015/04/30 09:57:38 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: route.c,v 1.145 2015/06/08 08:21:49 roy Exp $");
 
 #include <sys/param.h>
 #ifdef RTFLUSH_DEBUG
@@ -213,6 +213,8 @@
 #endif
        else {
                ifa = (*ifa->ifa_getifa)(ifa, rt_getkey(rt));
+               if (ifa == NULL)
+                       return NULL;
                rt_replace_ifa(rt, ifa);
                return ifa;
        }
@@ -676,8 +678,11 @@
        }
        if ((ifa = info->rti_ifa) == NULL)
                return ENETUNREACH;
-       if (ifa->ifa_getifa != NULL)
+       if (ifa->ifa_getifa != NULL) {
                info->rti_ifa = ifa = (*ifa->ifa_getifa)(ifa, dst);
+               if (ifa == NULL)
+                       return ENETUNREACH;
+       }
        if (info->rti_ifp == NULL)
                info->rti_ifp = ifa->ifa_ifp;
        return 0;