linux-kernel - [PATCH net, 1/2] net: core: Fix missing init of llist_node in setup

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Message-Id: <1753228248-20865-2-git-send-email-haiyangz@linux.microsoft.com>
Date: Tue, 22 Jul 2025 16:50:47 -0700
From: Haiyang Zhang <haiyangz@...ux.microsoft.com>
To: linux-hyperv@...r.kernel.org,
	netdev@...r.kernel.org
Cc: haiyangz@...rosoft.com,
	kys@...rosoft.com,
	wei.liu@...nel.org,
	decui@...rosoft.com,
	andrew+netdev@...n.ch,
	sd@...asysnail.net,
	viro@...iv.linux.org.uk,
	chuck.lever@...cle.com,
	neil@...wn.name,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	horms@...nel.org,
	davem@...emloft.net,
	kuniyu@...gle.com,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: [PATCH net, 1/2] net: core: Fix missing init of llist_node in setup_net()

From: Haiyang Zhang <haiyangz@...rosoft.com>

Add init_llist_node for lock-less list nodes in struct net in
setup_net(), so we can test if a node is on a list or not.

Cc: stable@...r.kernel.org
Fixes: d6b3358a2813 ("llist: add interface to check if a node is on a list.")
Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
---
 net/core/net_namespace.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index ae54f26709ca..2a821849558f 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -434,6 +434,9 @@ static __net_init int setup_net(struct net *net)
 	LIST_HEAD(net_exit_list);
 	int error = 0;
 
+	init_llist_node(&net->defer_free_list);
+	init_llist_node(&net->cleanup_list);
+
 	preempt_disable();
 	net->net_cookie = gen_cookie_next(&net_cookie);
 	preempt_enable();
-- 
2.34.1