Patch "netrom: Fix a data-race around sysctl_netrom_transport_requested_window_size" has been added to the 5.4-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_requested_window_size

to the 5.4-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-5.4 subdirectory.

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



commit f35ed10b48c20db956fdef478503a5a8b182f232
Author: Jason Xing <kernelxing@xxxxxxxxxxx>
Date:   Mon Mar 4 16:20:42 2024 +0800

    netrom: Fix a data-race around sysctl_netrom_transport_requested_window_size
    
    [ Upstream commit a2e706841488f474c06e9b33f71afc947fb3bf56 ]
    
    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 d02db01edf2fd..bf29260f6e52a 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -440,7 +440,7 @@ static int nr_create(struct net *net, struct socket *sock, int protocol,
 		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;
+	nr->window = READ_ONCE(sysctl_netrom_transport_requested_window_size);
 
 	nr->bpqext = 1;
 	nr->state  = NR_STATE_0;




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