From e041df5dc9e68adffcba5499ca28e1252bed6f4b Mon Sep 17 00:00:00 2001
From: Jason Xing <kernelxing@tencent.com>
Date: Mon, 4 Mar 2024 16:20:35 +0800
Subject: [PATCH] netrom: Fix a data-race around
sysctl_netrom_default_path_quality
[ Upstream commit 958d6145a6d9ba9e075c921aead8753fb91c9101 ]
We need to protect the reader reading sysctl_netrom_default_path_quality
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/nr_route.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c
index 78da5eab252a0..94c4d4554b9c7 100644
--- a/net/netrom/nr_route.c
+++ b/net/netrom/nr_route.c
@@ -153,7 +153,7 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
nr_neigh->digipeat = NULL;
nr_neigh->ax25 = NULL;
nr_neigh->dev = dev;
- nr_neigh->quality = sysctl_netrom_default_path_quality;
+ nr_neigh->quality = READ_ONCE(sysctl_netrom_default_path_quality);
nr_neigh->locked = 0;
nr_neigh->count = 0;
nr_neigh->number = nr_neigh_no++;
--
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