Patch "netrom: Fix a data-race around sysctl_netrom_transport_timeout" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    netrom: Fix a data-race around sysctl_netrom_transport_timeout

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     netrom-fix-a-data-race-around-sysctl_netrom_transpor.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 6ed6d5f3bdfe4fac7253d54e289528c2e77618a6
Author: Jason Xing <kernelxing@xxxxxxxxxxx>
Date:   Mon Mar 4 16:20:38 2024 +0800

    netrom: Fix a data-race around sysctl_netrom_transport_timeout
    
    [ Upstream commit 60a7a152abd494ed4f69098cf0f322e6bb140612 ]
    
    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@xxxxxxxxxxx>
    Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 24747163122bb..6857510967448 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -453,7 +453,7 @@ static int nr_create(struct net *net, struct socket *sock, int protocol,
 	nr_init_timers(sk);
 
 	nr->t1     =
-		msecs_to_jiffies(sysctl_netrom_transport_timeout);
+		msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_timeout));
 	nr->t2     =
 		msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
 	nr->n2     =




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