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mac80211: further RCU fixes 

There were a few more instances of sta_info_get calls not being
protected by RCU, fix them.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2008-04-10 15:36:09 +02:00 committed by John W. Linville
parent 171afcd4ba
commit 98dd6a5759
2 changed files with 22 additions and 3 deletions
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20
net/mac80211/cfg.c
View File

@ -718,12 +718,18 @@ static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
struct sta_info *sta;
if (mac) {
rcu_read_lock();
/* XXX: get sta belonging to dev */
sta = sta_info_get(local, mac);
if (!sta)
if (!sta) {
rcu_read_unlock();
return -ENOENT;
}
sta_info_unlink(&sta);
rcu_read_unlock();
sta_info_destroy(sta);
} else
sta_info_flush(local, sdata);
@ -740,17 +746,23 @@ static int ieee80211_change_station(struct wiphy *wiphy,
struct sta_info *sta;
struct ieee80211_sub_if_data *vlansdata;
rcu_read_lock();
/* XXX: get sta belonging to dev */
sta = sta_info_get(local, mac);
if (!sta)
if (!sta) {
rcu_read_unlock();
return -ENOENT;
}
if (params->vlan && params->vlan != sta->sdata->dev) {
vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN ||
vlansdata->vif.type != IEEE80211_IF_TYPE_AP)
vlansdata->vif.type != IEEE80211_IF_TYPE_AP) {
rcu_read_unlock();
return -EINVAL;
}
sta->sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
ieee80211_send_layer2_update(sta);
@ -758,6 +770,8 @@ static int ieee80211_change_station(struct wiphy *wiphy,
sta_apply_parameters(local, sta, params);
rcu_read_unlock();
return 0;
}

5
net/mac80211/wext.c
View File

@ -980,6 +980,8 @@ static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct sta_info *sta = NULL;
rcu_read_lock();
if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
sdata->vif.type == IEEE80211_IF_TYPE_IBSS)
sta = sta_info_get(local, sdata->u.sta.bssid);
@ -996,6 +998,9 @@ static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev
wstats->qual.noise = sta->last_noise;
wstats->qual.updated = local->wstats_flags;
}
rcu_read_unlock();
return wstats;
}