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Commit e3a3718b authored by Jason Xing's avatar Jason Xing Committed by Sasha Levin
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netrom: Fix a data-race around sysctl_netrom_obsolescence_count_initialiser 



[ Upstream commit cfd9f4a740f772298308b2e6070d2c744fb5cf79 ]

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: default avatarJason Xing <kernelxing@tencent.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 7644df76

net/netrom/nr_route.c

+1 −1
Original line number Diff line number Diff line
@@ -766,7 +766,7 @@ int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25) 
	if (ax25 != NULL) {

		ret = nr_add_node(nr_src, "", &ax25->dest_addr, ax25->digipeat,

				  ax25->ax25_dev->dev, 0,

				  sysctl_netrom_obsolescence_count_initialiser);

				  READ_ONCE(sysctl_netrom_obsolescence_count_initialiser));

		if (ret)

			return ret;

	}