From: Jason Xing kernelxing@tencent.com
[ Upstream commit b5dffcb8f71bdd02a4e5799985b51b12f4eeaf76 ]
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/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 929446e246b36..eb285b12977b7 100644 --- a/net/netrom/nr_route.c +++ b/net/netrom/nr_route.c @@ -780,7 +780,7 @@ int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25) return ret; }
- if (!sysctl_netrom_routing_control && ax25 != NULL) + if (!READ_ONCE(sysctl_netrom_routing_control) && ax25 != NULL) return 0;
/* Its Time-To-Live has expired */