This is a note to let you know that I've just added the patch titled
mac80211: add missing synchronize_rcu
to the 2.6.36-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-add-missing-synchronize_rcu.patch
and it can be found in the queue-2.6.36 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From d2460f4b2fa6dbdeec800414f9cf5b1fc8b71197 Mon Sep 17 00:00:00 2001
From: Johannes Berg <[email protected]>
Date: Mon, 3 Jan 2011 19:42:24 +0100
Subject: mac80211: add missing synchronize_rcu
From: Johannes Berg <[email protected]>
commit d2460f4b2fa6dbdeec800414f9cf5b1fc8b71197 upstream.
commit ad0e2b5a00dbec303e4682b403bb6703d11dcdb2
Author: Johannes Berg <[email protected]>
Date: Tue Jun 1 10:19:19 2010 +0200
mac80211: simplify key locking
removed the synchronization against RCU and thus
opened a race window where we can use a key for
TX while it is already freed. Put a synchronisation
into the right place to close that window.
Reported-by: Jussi Kivilinna <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
---
net/mac80211/key.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -323,6 +323,12 @@ static void __ieee80211_key_destroy(stru
if (!key)
return;
+ /*
+ * Synchronize so the TX path can no longer be using
+ * this key before we free/remove it.
+ */
+ synchronize_rcu();
+
if (key->local)
ieee80211_key_disable_hw_accel(key);
Patches currently in stable-queue which might be from [email protected]
are
queue-2.6.36/mac80211-add-missing-synchronize_rcu.patch
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