diff options
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 1ddb6b9c58a8..07da7add4845 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1625,6 +1625,8 @@ int register_netdevice_notifier(struct notifier_block *nb) struct net *net; int err; + /* Close race with setup_net() and cleanup_net() */ + down_write(&pernet_ops_rwsem); rtnl_lock(); err = raw_notifier_chain_register(&netdev_chain, nb); if (err) @@ -1649,6 +1651,7 @@ int register_netdevice_notifier(struct notifier_block *nb) unlock: rtnl_unlock(); + up_write(&pernet_ops_rwsem); return err; rollback: @@ -1694,6 +1697,8 @@ int unregister_netdevice_notifier(struct notifier_block *nb) struct net *net; int err; + /* Close race with setup_net() and cleanup_net() */ + down_write(&pernet_ops_rwsem); rtnl_lock(); err = raw_notifier_chain_unregister(&netdev_chain, nb); if (err) @@ -1713,6 +1718,7 @@ int unregister_netdevice_notifier(struct notifier_block *nb) up_read(&net_rwsem); unlock: rtnl_unlock(); + up_write(&pernet_ops_rwsem); return err; } EXPORT_SYMBOL(unregister_netdevice_notifier); |