Unverified Commit f12021e6 authored Sep 18, 2025 by Christian Brauner

ipv4: use check_net()



Don't directly acess the namespace count. There's even a dedicated
helper for this.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>

parent dc41b844

net/ipv4/inet_timewait_sock.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -329,13 +329,13 @@ void inet_twsk_purge(struct inet_hashinfo *hashinfo)
		TCPF_NEW_SYN_RECV))
		continue;

		if (refcount_read(&sock_net(sk)->ns.count))
		if (check_net(sock_net(sk)))
		continue;

		if (unlikely(!refcount_inc_not_zero(&sk->sk_refcnt)))
		continue;

		if (refcount_read(&sock_net(sk)->ns.count)) {
		if (check_net(sock_net(sk))) {
		sock_gen_put(sk);
		goto restart;
		}

net/ipv4/tcp_metrics.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -912,7 +912,7 @@ static void tcp_metrics_flush_all(struct net *net)
		spin_lock_bh(&tcp_metrics_lock);
		for (tm = deref_locked(pp); tm; tm = deref_locked(pp)) {
		match = net ? net_eq(tm_net(tm), net) :
		!refcount_read(&tm_net(tm)->ns.count);
		!check_net(tm_net(tm));
		if (match) {
		rcu_assign_pointer(*pp, tm->tcpm_next);
		kfree_rcu(tm, rcu_head);