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-rw-r--r--net/ipv6/route.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 0302e0eb07af..7178e32eb15d 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2330,6 +2330,10 @@ 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);