netns: fix unbalanced spin_lock on error

Unlock was missing on error path.

Fixes: 95f38411df05 ("netns: use a spin_lock to protect nsid management")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index cbee75f2fc28..d2f42da9479b 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;
         }