Patch "mac80211: enable assoc check for mesh interfaces" has been added to the 4.1-stable tree

Patch "mac80211: enable assoc check for mesh interfaces" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    mac80211: enable assoc check for mesh interfaces

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mac80211-enable-assoc-check-for-mesh-interfaces.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 3633ebebab2bbe88124388b7620442315c968e8f Mon Sep 17 00:00:00 2001
From: Bob Copeland <me@bobcopeland.com>
Date: Sat, 13 Jun 2015 10:16:31 -0400
Subject: mac80211: enable assoc check for mesh interfaces

From: Bob Copeland <me@bobcopeland.com>

commit 3633ebebab2bbe88124388b7620442315c968e8f upstream.

We already set a station to be associated when peering completes, both
in user space and in the kernel.  Thus we should always have an
associated sta before sending data frames to that station.

Failure to check assoc state can cause crashes in the lower-level driver
due to transmitting unicast data frames before driver sta structures
(e.g. ampdu state in ath9k) are initialized.  This occurred when
forwarding in the presence of fixed mesh paths: frames were transmitted
to stations with whom we hadn't yet completed peering.

Reported-by: Alexis Green <agreen@cococorp.com>
Tested-by: Jesse Jones <jjones@cococorp.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/mac80211/tx.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -301,9 +301,6 @@ ieee80211_tx_h_check_assoc(struct ieee80
 	if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
 		return TX_CONTINUE;
 
-	if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
-		return TX_CONTINUE;
-
 	if (tx->flags & IEEE80211_TX_PS_BUFFERED)
 		return TX_CONTINUE;
 


Patches currently in stable-queue which might be from me@bobcopeland.com are

queue-4.1/mac80211-enable-assoc-check-for-mesh-interfaces.patch