This is a note to let you know that I've just added the patch titled
mac80211: fix txq queue related crashes
to the 4.5-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-fix-txq-queue-related-crashes.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2a58d42c1e018ad514d4e23fd33fb2ded95d3ee6 Mon Sep 17 00:00:00 2001
From: Michal Kazior <michal.kazior@xxxxxxxxx>
Date: Thu, 21 Jan 2016 14:23:07 +0100
Subject: mac80211: fix txq queue related crashes
From: Michal Kazior <michal.kazior@xxxxxxxxx>
commit 2a58d42c1e018ad514d4e23fd33fb2ded95d3ee6 upstream.
The driver can access the queue simultanously
while mac80211 tears down the interface. Without
spinlock protection this could lead to corrupting
sk_buff_head and subsequently to an invalid
pointer dereference.
Fixes: ba8c3d6f16a1 ("mac80211: add an intermediate software queue implementation")
Signed-off-by: Michal Kazior <michal.kazior@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/iface.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -977,7 +977,10 @@ static void ieee80211_do_stop(struct iee
if (sdata->vif.txq) {
struct txq_info *txqi = to_txq_info(sdata->vif.txq);
+ spin_lock_bh(&txqi->queue.lock);
ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
+ spin_unlock_bh(&txqi->queue.lock);
+
atomic_set(&sdata->txqs_len[txqi->txq.ac], 0);
}
Patches currently in stable-queue which might be from michal.kazior@xxxxxxxxx are
queue-4.5/mac80211-fix-unnecessary-frame-drops-in-mesh-fwding.patch
queue-4.5/mac80211-fix-txq-queue-related-crashes.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html