decnet: add RTNL lock when reading address list
Add missing locking in the case of auto binding to the default device. The address list might change while this code is looking at the list. Compile tested only, I am not a decnet user. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -828,13 +828,17 @@ static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
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struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
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struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
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struct dn_ifaddr *ifa;
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struct dn_ifaddr *ifa;
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int rv = -ENODEV;
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int rv = -ENODEV;
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if (dn_db == NULL)
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if (dn_db == NULL)
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goto out;
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goto out;
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rtnl_lock();
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ifa = dn_db->ifa_list;
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ifa = dn_db->ifa_list;
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if (ifa != NULL) {
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if (ifa != NULL) {
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*addr = ifa->ifa_local;
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*addr = ifa->ifa_local;
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rv = 0;
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rv = 0;
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}
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}
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rtnl_unlock();
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out:
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out:
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return rv;
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return rv;
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}
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}
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