1 files changed, 15 insertions, 0 deletions

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 626a58206298..6b178e1247b5 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1396,6 +1396,9 @@ netlink_kernel_create(struct net *net, int unit, unsigned int groups,
         }
         netlink_table_ungrab();
 
+        /* Do not hold an extra referrence to a namespace as this socket is
+         * internal to a namespace and does not prevent it to stop. */
+        put_net(net);
         return sk;
 
 out_sock_release:
@@ -1411,7 +1414,19 @@ netlink_kernel_release(struct sock *sk)
 {
         if (sk == NULL || sk->sk_socket == NULL)
                 return;
+
+        /*
+         * Last sock_put should drop referrence to sk->sk_net. It has already
+         * been dropped in netlink_kernel_create. Taking referrence to stopping
+         * namespace is not an option.
+         * Take referrence to a socket to remove it from netlink lookup table
+         * _alive_ and after that destroy it in the context of init_net.
+         */
+        sock_hold(sk);
         sock_release(sk->sk_socket);
+
+        sk->sk_net = get_net(&init_net);
+        sock_put(sk);
 }
 EXPORT_SYMBOL(netlink_kernel_release);