Re: [Patch v3 2/3] ipv4: Namespaceify tcp_fastopen_key knob

[David Miller]

From: Haishuang Yan <yanhaishuang@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 19 Sep 2017 17:38:15 +0800

> @@ -128,6 +130,8 @@ struct netns_ipv4 {
>  	struct inet_timewait_death_row tcp_death_row;
>  	int sysctl_max_syn_backlog;
>  	int sysctl_tcp_fastopen;
> +	struct tcp_fastopen_context __rcu *tcp_fastopen_ctx;
> +	spinlock_t tcp_fastopen_ctx_lock;
>  
>  #ifdef CONFIG_NET_L3_MASTER_DEV
>  	int sysctl_udp_l3mdev_accept;

Where are you releasing this context during netns teardown?
I think this is a leak.