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Commit 7644df76 authored by Jason Xing's avatar Jason Xing Committed by Sasha Levin
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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: 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 98db4219

net/netrom/nr_route.c

+1 −1
Original line number Diff line number Diff line
@@ -156,7 +156,7 @@ 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++;