1 files changed, 2 insertions, 0 deletions

diff --git a/net/core/fib_notifier.c b/net/core/fib_notifier.c
index 0c048bdeb016..614b985c92a4 100644
--- a/net/core/fib_notifier.c
+++ b/net/core/fib_notifier.c
@@ -33,6 +33,7 @@ static unsigned int fib_seq_sum(void)
         struct net *net;
 
         rtnl_lock();
+        down_read(&net_rwsem);
         for_each_net(net) {
                 rcu_read_lock();
                 list_for_each_entry_rcu(ops, &net->fib_notifier_ops, list) {
@@ -43,6 +44,7 @@ static unsigned int fib_seq_sum(void)
                 }
                 rcu_read_unlock();
         }
+        up_read(&net_rwsem);
         rtnl_unlock();
 
         return fib_seq;