From: Jason Xing kernelxing@tencent.com
[ Upstream commit bc76645ebdd01be9b9994dac39685a3d0f6f7985 ]
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 4fb5959a7f070..37cfa880c2d05 100644 --- a/net/netrom/nr_route.c +++ b/net/netrom/nr_route.c @@ -725,7 +725,7 @@ void nr_link_failed(ax25_cb *ax25, int reason) nr_neigh->ax25 = NULL; ax25_cb_put(ax25);
- if (++nr_neigh->failed < sysctl_netrom_link_fails_count) { + if (++nr_neigh->failed < READ_ONCE(sysctl_netrom_link_fails_count)) { nr_neigh_put(nr_neigh); return; }