linux-stable.git/net/mac80211, branch linux-4.3.y

mac80211: fix divide by zero when NOA update

2015-12-09T19:34:21+00:00

commit 519ee6918b91abdc4bc9720deae17599a109eb40 upstream.

In case of one shot NOA the interval can be 0, catch that
instead of potentially (depending on the driver) crashing
like this:

divide error: 0000 [#1] SMP
[...]
Call Trace:

[] ieee80211_extend_absent_time+0x6c/0xb0 [mac80211]
[] ieee80211_update_p2p_noa+0xb7/0xe0 [mac80211]
[] ath9k_p2p_ps_timer+0x170/0x190 [ath9k]
[] ath_gen_timer_isr+0xc8/0xf0 [ath9k_hw]
[] ath9k_tasklet+0x296/0x2f0 [ath9k]
[] tasklet_action+0xe5/0xf0
[...]

Signed-off-by: Janusz Dziedzic 
Signed-off-by: Johannes Berg 
Signed-off-by: Greg Kroah-Hartman

mac80211: allow null chandef in tracing

2015-12-09T19:34:21+00:00

commit 254d3dfe445f94a764e399ca12e04365ac9413ed upstream.

In TDLS channel-switch operations the chandef can sometimes be NULL.
Avoid an oops in the trace code for these cases and just print a
chandef full of zeros.

Fixes: a7a6bdd0670fe ("mac80211: introduce TDLS channel switch ops")
Signed-off-by: Arik Nemtsov 
Signed-off-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg 
Signed-off-by: Greg Kroah-Hartman

mac80211: fix driver RSSI event calculations

2015-12-09T19:34:20+00:00

commit 8ec6d97871f37e4743678ea4a455bd59580aa0f4 upstream.

The ifmgd->ave_beacon_signal value cannot be taken as is for
comparisons, it must be divided by since it's represented
like that for better accuracy of the EWMA calculations. This
would lead to invalid driver RSSI events. Fix the used value.

Fixes: 615f7b9bb1f8 ("mac80211: add driver RSSI threshold events")
Signed-off-by: Johannes Berg 
Signed-off-by: Greg Kroah-Hartman

mac80211: Fix local deauth while associating

2015-12-09T19:34:20+00:00

commit a64cba3c5330704a034bd3179270b8d04daf6987 upstream.

Local request to deauthenticate wasn't handled while associating, thus
the association could continue even when the user space required to
disconnect.

Signed-off-by: Andrei Otcheretianski 
Signed-off-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg 
Signed-off-by: Greg Kroah-Hartman

mac80211: Fix hwflags debugfs file format

2015-10-13T08:30:56+00:00

Commit 30686bf7f5b3 ("mac80211: convert HW flags to unsigned long
bitmap") accidentally removed the newline delimiter from the hwflags
debugfs file. Fix this by adding back the newline between the HW flags.

Cc: stable@vger.kernel.org [4.2]
Signed-off-by: Mohammed Shafi Shajakhan 
[fix commit log]
Signed-off-by: Jouni Malinen 
Signed-off-by: Johannes Berg

mac80211: fix handling of PS filtering with fast-xmit

2015-09-24T14:28:01+00:00

Fixes dropped packets in the tx path in case a non-PS station triggers
the tx filter.

Signed-off-by: Felix Fietkau 
Signed-off-by: Johannes Berg

mac80211: reset CQM history upon reconfiguration

2015-09-22T13:22:50+00:00

The current behavior of notifying CQM events is inconsistent:
Upon first configuration there is a cqm event with the current
status according to threshold configured, regardless of signal
stability.
When there is reconfiguration no event is sent unless there is
a significant change to the signal level according to the new
configuration.

Since the current reconfiguration behavior might cause missing
CQM events in case the current signal did not change but is on
the other side of the new threshold, fix that by resetting the
stored signal level upon reconfiguration.

Signed-off-by: Sara Sharon 
Signed-off-by: Luca Coelho 
Signed-off-by: Johannes Berg

mac80211: fix VHT MCS mask array overrun

2015-09-22T13:19:48+00:00

The HT MCS mask has 9 bytes, the VHT one only has 8 streams.
Split the loops to handle this correctly.

Reported-by: Dan Carpenter 
Signed-off-by: Johannes Berg

mac80211: reject software RSSI CQM with beacon filtering

2015-09-04T13:23:22+00:00

When beacon filtering is enabled the mac80211 software implementation
for RSSI CQM cannot work as beacons will not be available. Rather than
accepting such a configuration without proper effect, reject it.

Signed-off-by: Johannes Berg

mac80211: avoid VHT usage with no 80MHz chans allowed

2015-09-04T12:31:41+00:00

Currently if 80MHz channels are not allowed for use, the VHT IE is not
included in the probe request for an AP. This is not good enough if the
AP is configured with the wrong regulatory and supports VHT even where
prohibited or in TDLS scenarios.
Mark the ifmgd with the DISABLE_VHT flag for the misbehaving-AP case, and
unset VHT support from the peer-station entry for the TDLS case.

Signed-off-by: Arik Nemtsov 
Signed-off-by: Emmanuel Grumbach 
Signed-off-by: Johannes Berg