diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index cbee75f2fc2865a815b43af5e829a2b2807f8716..d2f42da9479ba9cee3f134e8a6b8786f3065be7a 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -565,6 +565,7 @@ static int rtnl_net_newid(struct sk_buff *skb, struct nlmsghdr *nlh)
 
 	spin_lock_irqsave(&nsid_lock, flags);
 	if (__peernet2id(net, peer) >= 0) {
+		spin_unlock_irqrestore(&nsid_lock, flags);
 		err = -EEXIST;
 		goto out;
 	}