From: Christian Brauner <brauner@kernel.org>
To: linux-fsdevel@vger.kernel.org
Cc: "Amir Goldstein" <amir73il@gmail.com>,
"Josef Bacik" <josef@toxicpanda.com>,
"Jeff Layton" <jlayton@kernel.org>, "Mike Yuan" <me@yhndnzj.com>,
"Zbigniew Jędrzejewski-Szmek" <zbyszek@in.waw.pl>,
"Lennart Poettering" <mzxreary@0pointer.de>,
"Daan De Meyer" <daan.j.demeyer@gmail.com>,
"Aleksa Sarai" <cyphar@cyphar.com>,
"Alexander Viro" <viro@zeniv.linux.org.uk>,
"Jan Kara" <jack@suse.cz>, "Tejun Heo" <tj@kernel.org>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Michal Koutný" <mkoutny@suse.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Anna-Maria Behnsen" <anna-maria@linutronix.de>,
"Frederic Weisbecker" <frederic@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, "Christian Brauner" <brauner@kernel.org>
Subject: [PATCH 09/14] net: use check_net()
Date: Thu, 18 Sep 2025 12:11:54 +0200 [thread overview]
Message-ID: <20250918-work-namespace-ns_ref-v1-9-1b0a98ee041e@kernel.org> (raw)
In-Reply-To: <20250918-work-namespace-ns_ref-v1-0-1b0a98ee041e@kernel.org>
Don't directly acess the namespace count. There's even a dedicated
helper for this.
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
net/core/net_namespace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index fdbaf5f8ac78..d81a8b291ea8 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -315,7 +315,7 @@ int peernet2id_alloc(struct net *net, struct net *peer, gfp_t gfp)
{
int id;
- if (refcount_read(&net->ns.count) == 0)
+ if (!check_net(net))
return NETNSA_NSID_NOT_ASSIGNED;
spin_lock(&net->nsid_lock);
--
2.47.3
next prev parent reply other threads:[~2025-09-18 10:12 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-18 10:11 [PATCH 00/14] ns: rework reference counting Christian Brauner
2025-09-18 10:11 ` [PATCH 01/14] ns: add reference count helpers Christian Brauner
2025-09-18 10:11 ` [PATCH 02/14] mnt: port to ns_ref_*() helpers Christian Brauner
2025-09-18 10:11 ` [PATCH 03/14] cgroup: " Christian Brauner
2025-09-18 15:51 ` Tejun Heo
2025-09-18 10:11 ` [PATCH 04/14] ipc: " Christian Brauner
2025-09-18 10:11 ` [PATCH 05/14] pid: " Christian Brauner
2025-09-18 10:11 ` [PATCH 06/14] time: " Christian Brauner
2025-09-21 7:36 ` Thomas Gleixner
2025-09-18 10:11 ` [PATCH 07/14] user: " Christian Brauner
2025-09-18 10:11 ` [PATCH 08/14] net-sysfs: use check_net() Christian Brauner
2025-09-18 10:11 ` Christian Brauner [this message]
2025-09-18 10:11 ` [PATCH 10/14] ipv4: " Christian Brauner
2025-09-18 10:11 ` [PATCH 11/14] uts: port to ns_ref_*() helpers Christian Brauner
2025-09-18 10:11 ` [PATCH 12/14] net: " Christian Brauner
2025-09-18 10:11 ` [PATCH 13/14] nsfs: " Christian Brauner
2025-09-18 10:11 ` [PATCH 14/14] ns: rename to __ns_ref Christian Brauner
2025-09-18 12:12 ` Michal Koutný
2025-09-21 7:37 ` Thomas Gleixner
2025-09-18 10:41 ` [PATCH 00/14] ns: rework reference counting Jan Kara
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