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netrom: Fix a data-race around sysctl_netrom_default_path_quality

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

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Jason Xing 2024-03-04 16:20:35 +08:00 • committed by Paolo Abeni
parent 811b3f9b2a
commit 958d6145a6
1 changed files with 1 additions and 1 deletions
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2
net/netrom/nr_route.c
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@ -153,7 +153,7 @@ 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++;