Patch "ath9k: fix using sta->drv_priv before initializing it" has been added to the 4.4-stable tree

Patch "ath9k: fix using sta->drv_priv before initializing it" has been added to the 4.4-stable tree

[gregkh]

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

    ath9k: fix using sta->drv_priv before initializing it

to the 4.4-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:
     ath9k-fix-using-sta-drv_priv-before-initializing-it.patch
and it can be found in the queue-4.4 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 7711aaf08ad3fc4d0e937eec1de0a63620444ce7 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 19 Aug 2016 13:37:46 +0300
Subject: ath9k: fix using sta->drv_priv before initializing it

From: Felix Fietkau <nbd@nbd.name>

commit 7711aaf08ad3fc4d0e937eec1de0a63620444ce7 upstream.

A station pointer can be passed to the driver on tx, before it has been
marked as associated. Since ath9k_sta_state was initializing the entry
too late, it resulted in some spurious crashes.

Fixes: df3c6eb34da5 ("ath9k: Use sta_state() callback")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/ath/ath9k/main.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1550,13 +1550,13 @@ static int ath9k_sta_state(struct ieee80
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	int ret = 0;
 
-	if (old_state == IEEE80211_STA_AUTH &&
-	    new_state == IEEE80211_STA_ASSOC) {
+	if (old_state == IEEE80211_STA_NOTEXIST &&
+	    new_state == IEEE80211_STA_NONE) {
 		ret = ath9k_sta_add(hw, vif, sta);
 		ath_dbg(common, CONFIG,
 			"Add station: %pM\n", sta->addr);
-	} else if (old_state == IEEE80211_STA_ASSOC &&
-		   new_state == IEEE80211_STA_AUTH) {
+	} else if (old_state == IEEE80211_STA_NONE &&
+		   new_state == IEEE80211_STA_NOTEXIST) {
 		ret = ath9k_sta_remove(hw, vif, sta);
 		ath_dbg(common, CONFIG,
 			"Remove station: %pM\n", sta->addr);


Patches currently in stable-queue which might be from nbd@nbd.name are

queue-4.4/ath9k-fix-using-sta-drv_priv-before-initializing-it.patch