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netrom: Fix a data-race around sysctl_netrom_obsolescence_count_initialiser

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We need to protect the reader reading the sysctl value
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 16:20:36 +08:00 committed by Paolo Abeni
parent 958d6145a6
commit cfd9f4a740
1 changed files with 1 additions and 1 deletions
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2
net/netrom/nr_route.c
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@ -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;
}