If the device uses the HT mode and receives a frame from a sta whith state < IEEE80211_STA_ASSOC then the null pointer exception crashes the Linnux kernel. In the case of ath9k, the function ath_tx_node_init is indirectly called by drv_sta_state (in net/mac80211/driver-ops.h) only when the sta_state goes to IEEE80211_STA_ASSOC from IEEE80211_STA_AUTH. Signed-off-by: cedric VONCKEN <cedric.voncken@xxxxxxxxx> --- net/mac80211/sta_info.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 11216bc..bcfd7b0 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -1040,7 +1040,8 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1); sta->driver_buffered_tids = 0; - if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) + if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS && + sta->sta_state >= IEEE80211_STA_ASSOC)) drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta); skb_queue_head_init(&pending); -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
