[PATCH 10/14] ipv4: use check_net()
From: Christian Brauner <brauner@kernel.org>
Date: 2025-09-18 10:12:42
Also in:
cgroups, linux-fsdevel, lkml
Subsystem:
networking [general], networking [tcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Neal Cardwell, Linus Torvalds
Don't directly acess the namespace count. There's even a dedicated helper for this. Signed-off-by: Christian Brauner <brauner@kernel.org> --- net/ipv4/inet_timewait_sock.c | 4 ++-- net/ipv4/tcp_metrics.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
index 875ff923a8ed..56a117560c0c 100644
--- a/net/ipv4/inet_timewait_sock.c
+++ b/net/ipv4/inet_timewait_sock.c@@ -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; }
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 03c068ea27b6..b67f94c60f9f 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c@@ -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);
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2.47.3