Commit c13fbb59 authored Mar 04, 2024 by Jason Xing Committed by Sasha Levin Mar 15, 2024

netrom: Fix a data-race around sysctl_netrom_routing_control



[ Upstream commit b5dffcb8f71bdd02a4e5799985b51b12f4eeaf76 ]

We need to protect the reader reading the sysctl value because the
value can be changed concurrently.

Fixes: 1da177e4 ("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>

parent 73426c32

net/netrom/nr_route.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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 */