Merge branch 'security' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6

* 'security' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6:
  mac80211: fix spurious delBA handling
  mac80211: fix two remote exploits
This commit is contained in:
Linus Torvalds 2009-11-30 16:47:16 -08:00
commit 29e553631b
6 changed files with 28 additions and 19 deletions

View file

@ -1277,8 +1277,16 @@ int iwl_tx_agg_stop(struct iwl_priv *priv , const u8 *ra, u16 tid)
return -ENXIO; return -ENXIO;
} }
if (priv->stations[sta_id].tid[tid].agg.state ==
IWL_EMPTYING_HW_QUEUE_ADDBA) {
IWL_DEBUG_HT(priv, "AGG stop before setup done\n");
ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, ra, tid);
priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
return 0;
}
if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON) if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
IWL_WARN(priv, "Stopping AGG while state not IWL_AGG_ON\n"); IWL_WARN(priv, "Stopping AGG while state not ON or starting\n");
tid_data = &priv->stations[sta_id].tid[tid]; tid_data = &priv->stations[sta_id].tid[tid];
ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;

View file

@ -1283,6 +1283,12 @@ enum ieee80211_filter_flags {
* *
* These flags are used with the ampdu_action() callback in * These flags are used with the ampdu_action() callback in
* &struct ieee80211_ops to indicate which action is needed. * &struct ieee80211_ops to indicate which action is needed.
*
* Note that drivers MUST be able to deal with a TX aggregation
* session being stopped even before they OK'ed starting it by
* calling ieee80211_start_tx_ba_cb(_irqsafe), because the peer
* might receive the addBA frame and send a delBA right away!
*
* @IEEE80211_AMPDU_RX_START: start Rx aggregation * @IEEE80211_AMPDU_RX_START: start Rx aggregation
* @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation
* @IEEE80211_AMPDU_TX_START: start Tx aggregation * @IEEE80211_AMPDU_TX_START: start Tx aggregation

View file

@ -85,10 +85,6 @@ void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *r
struct ieee80211_local *local = sdata->local; struct ieee80211_local *local = sdata->local;
struct sta_info *sta; struct sta_info *sta;
/* stop HW Rx aggregation. ampdu_action existence
* already verified in session init so we add the BUG_ON */
BUG_ON(!local->ops->ampdu_action);
rcu_read_lock(); rcu_read_lock();
sta = sta_info_get(local, ra); sta = sta_info_get(local, ra);

View file

@ -123,13 +123,18 @@ void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u1
ieee80211_tx_skb(sdata, skb, 0); ieee80211_tx_skb(sdata, skb, 0);
} }
static int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
enum ieee80211_back_parties initiator) enum ieee80211_back_parties initiator)
{ {
struct ieee80211_local *local = sta->local; struct ieee80211_local *local = sta->local;
int ret; int ret;
u8 *state; u8 *state;
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
sta->sta.addr, tid);
#endif /* CONFIG_MAC80211_HT_DEBUG */
state = &sta->ampdu_mlme.tid_state_tx[tid]; state = &sta->ampdu_mlme.tid_state_tx[tid];
if (*state == HT_AGG_STATE_OPERATIONAL) if (*state == HT_AGG_STATE_OPERATIONAL)
@ -143,7 +148,6 @@ static int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
/* HW shall not deny going back to legacy */ /* HW shall not deny going back to legacy */
if (WARN_ON(ret)) { if (WARN_ON(ret)) {
*state = HT_AGG_STATE_OPERATIONAL;
/* /*
* We may have pending packets get stuck in this case... * We may have pending packets get stuck in this case...
* Not bothering with a workaround for now. * Not bothering with a workaround for now.
@ -525,11 +529,6 @@ int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
goto unlock; goto unlock;
} }
#ifdef CONFIG_MAC80211_HT_DEBUG
printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
sta->sta.addr, tid);
#endif /* CONFIG_MAC80211_HT_DEBUG */
ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator); ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
unlock: unlock:
@ -545,7 +544,7 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
struct sta_info *sta; struct sta_info *sta;
int ret = 0; int ret = 0;
if (WARN_ON(!local->ops->ampdu_action)) if (!local->ops->ampdu_action)
return -EINVAL; return -EINVAL;
if (tid >= STA_TID_NUM) if (tid >= STA_TID_NUM)

View file

@ -141,7 +141,6 @@ void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta, struct sta_info *sta,
struct ieee80211_mgmt *mgmt, size_t len) struct ieee80211_mgmt *mgmt, size_t len)
{ {
struct ieee80211_local *local = sdata->local;
u16 tid, params; u16 tid, params;
u16 initiator; u16 initiator;
@ -161,10 +160,9 @@ void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
WLAN_BACK_INITIATOR, 0); WLAN_BACK_INITIATOR, 0);
else { /* WLAN_BACK_RECIPIENT */ else { /* WLAN_BACK_RECIPIENT */
spin_lock_bh(&sta->lock); spin_lock_bh(&sta->lock);
sta->ampdu_mlme.tid_state_tx[tid] = if (sta->ampdu_mlme.tid_state_tx[tid] & HT_ADDBA_REQUESTED_MSK)
HT_AGG_STATE_OPERATIONAL; ___ieee80211_stop_tx_ba_session(sta, tid,
WLAN_BACK_RECIPIENT);
spin_unlock_bh(&sta->lock); spin_unlock_bh(&sta->lock);
ieee80211_stop_tx_ba_session(&local->hw, sta->sta.addr, tid,
WLAN_BACK_RECIPIENT);
} }
} }

View file

@ -1091,6 +1091,8 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
enum ieee80211_back_parties initiator); enum ieee80211_back_parties initiator);
int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
enum ieee80211_back_parties initiator);
/* Spectrum management */ /* Spectrum management */
void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata, void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,