Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[linux.git] / net / ipv6 / route.c

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index a77c004d67fbf337c192496849af381c26587178..9ece8067a59be9024602f619d35f0b2966abd027 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2331,6 +2331,10 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk,
 
                rcu_read_lock();
                from = rcu_dereference(rt6->from);
+               if (!from) {
+                       rcu_read_unlock();
+                       return;
+               }
                nrt6 = ip6_rt_cache_alloc(from, daddr, saddr);
                if (nrt6) {
                        rt6_do_update_pmtu(nrt6, mtu);