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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>
wifi-calibration
stephen hemminger 2009-11-11 07:39:27 +00:00 committed by David S. Miller
parent 08e9897d51
commit 41bdecf17e
1 changed files with 4 additions and 0 deletions
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4
net/decnet/dn_dev.c
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@ -828,13 +828,17 @@ static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
struct dn_ifaddr *ifa;
int rv = -ENODEV;
if (dn_db == NULL)
goto out;
rtnl_lock();
ifa = dn_db->ifa_list;
if (ifa != NULL) {
*addr = ifa->ifa_local;
rv = 0;
}
rtnl_unlock();
out:
return rv;
}