[PATCH 6.1 25/71] netrom: Fix a data-race around sysctl_netrom_transport_busy_delay

Sasha Levin
2024-03-13T16:40:28Z

From: Jason Xing <kernelxing@tencent.com>

[ Upstream commit 43547d8699439a67b78d6bb39015113f7aa360fd ]

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@tencent.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 7428ea436e318..ee6621c0d2e45 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -459,7 +459,7 @@ static int nr_create(struct net *net, struct socket *sock, int protocol,
nr->n2 =
msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_maximum_tries));
nr->t4 =
- msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
+ msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_busy_delay));
nr->idle =
msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);
nr->window = sysctl_netrom_transport_requested_window_size;
--
2.43.0