netdev - [PATCH net 06/12] netrom: Fix a data-race around sysctl_netrom_transport_acknowledge

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Message-Id: <20240304082046.64977-7-kerneljasonxing@gmail.com>
Date: Mon,  4 Mar 2024 16:20:40 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: ralf@...ux-mips.org,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: linux-hams@...r.kernel.org,
	netdev@...r.kernel.org,
	kerneljasonxing@...il.com,
	Jason Xing <kernelxing@...cent.com>
Subject: [PATCH net 06/12] netrom: Fix a data-race around sysctl_netrom_transport_acknowledge_delay

From: Jason Xing <kernelxing@...cent.com>

We need to protect the reader reading the sysctl value because the
value can be changed concurrently.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Jason Xing <kernelxing@...cent.com>
---
 net/netrom/af_netrom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 312fc745db7f..8ada0da3c0e0 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -455,7 +455,7 @@ static int nr_create(struct net *net, struct socket *sock, int protocol,
 	nr->t1     =
 		msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_timeout));
 	nr->t2     =
-		msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
+		msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_acknowledge_delay));
 	nr->n2     =
 		msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_maximum_tries));
 	nr->t4     =
-- 
2.37.3