ipv6: Check expire on DST_NOCACHE route

[firefly-linux-kernel-4.4.55.git] / net / ipv6 / route.c

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 74907c58a5c76f3c39c0d6f460533d0e1fb79fe5..3754cf9287a05a9a66497459a899f76185d4283b 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -404,6 +404,14 @@ static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
        }
 }
 
+static bool __rt6_check_expired(const struct rt6_info *rt)
+{
+       if (rt->rt6i_flags & RTF_EXPIRES)
+               return time_after(jiffies, rt->dst.expires);
+       else
+               return false;
+}
+
 static bool rt6_check_expired(const struct rt6_info *rt)
 {
        if (rt->rt6i_flags & RTF_EXPIRES) {
@@ -1252,7 +1260,8 @@ static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie)
 
 static struct dst_entry *rt6_dst_from_check(struct rt6_info *rt, u32 cookie)
 {
-       if (rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK &&
+       if (!__rt6_check_expired(rt) &&
+           rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK &&
            rt6_check((struct rt6_info *)(rt->dst.from), cookie))
                return &rt->dst;
        else