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Diffstat (limited to 'net/ipv6/route.c')
-rw-r--r--net/ipv6/route.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 4d0273459d49..26cc9f483b6d 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -440,7 +440,8 @@ static bool rt6_check_expired(const struct rt6_info *rt)
if (time_after(jiffies, rt->dst.expires))
return true;
} else if (rt->dst.from) {
- return rt6_check_expired((struct rt6_info *) rt->dst.from);
+ return rt->dst.obsolete != DST_OBSOLETE_FORCE_CHK ||
+ rt6_check_expired((struct rt6_info *)rt->dst.from);
}
return false;
}
@@ -1363,7 +1364,9 @@ static void rt6_dst_from_metrics_check(struct rt6_info *rt)
static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie)
{
- if (!rt->rt6i_node || (rt->rt6i_node->fn_sernum != cookie))
+ u32 rt_cookie = 0;
+
+ if (!rt6_get_cookie_safe(rt, &rt_cookie) || rt_cookie != cookie)
return NULL;
if (rt6_check_expired(rt))
@@ -1431,8 +1434,14 @@ static void ip6_link_failure(struct sk_buff *skb)
if (rt->rt6i_flags & RTF_CACHE) {
if (dst_hold_safe(&rt->dst))
ip6_del_rt(rt);
- } else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) {
- rt->rt6i_node->fn_sernum = -1;
+ } else {
+ struct fib6_node *fn;
+
+ rcu_read_lock();
+ fn = rcu_dereference(rt->rt6i_node);
+ if (fn && (rt->rt6i_flags & RTF_DEFAULT))
+ fn->fn_sernum = -1;
+ rcu_read_unlock();
}
}
}
@@ -1449,7 +1458,8 @@ static void rt6_do_update_pmtu(struct rt6_info *rt, u32 mtu)
static bool rt6_cache_allowed_for_pmtu(const struct rt6_info *rt)
{
return !(rt->rt6i_flags & RTF_CACHE) &&
- (rt->rt6i_flags & RTF_PCPU || rt->rt6i_node);
+ (rt->rt6i_flags & RTF_PCPU ||
+ rcu_access_pointer(rt->rt6i_node));
}
static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk,