diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2009-11-20 09:15:51 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-11-30 13:52:21 -0500 |
| commit | 4253119acf412fd686ef4bd8749b5a4d70ea3a51 (patch) | |
| tree | 44dc3e4ea5a6c2eb21a0e0c04de1c04e1662549d | |
| parent | 3e9848403ad59c53b31facb30b43ca80135ae0b9 (diff) | |
mac80211: fix two remote exploits
Lennert Buytenhek noticed a remotely triggerable problem
in mac80211, which is due to some code shuffling I did
that ended up changing the order in which things were
done -- this was in
commit d75636ef9c1af224f1097941879d5a8db7cd04e5
Author: Johannes Berg <johannes@sipsolutions.net>
Date: Tue Feb 10 21:25:53 2009 +0100
mac80211: RX aggregation: clean up stop session
The problem is that the BUG_ON moved before the various
checks, and as such can be triggered.
As the comment indicates, the BUG_ON can be removed since
the ampdu_action callback must already exist when the
state is OPERATIONAL.
A similar code path leads to a WARN_ON in
ieee80211_stop_tx_ba_session, which can also be removed.
Cc: stable@kernel.org [2.6.29+]
Cc: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | net/mac80211/agg-rx.c | 4 | ||||
| -rw-r--r-- | net/mac80211/agg-tx.c | 2 |
2 files changed, 1 insertions, 5 deletions
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index bc064d7933f..ce8e0e772ba 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -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 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(); sta = sta_info_get(local, ra); diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index 206fd82f0c7..63224d1ee8d 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -545,7 +545,7 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, struct sta_info *sta; int ret = 0; - if (WARN_ON(!local->ops->ampdu_action)) + if (!local->ops->ampdu_action) return -EINVAL; if (tid >= STA_TID_NUM) |