linux-kernel - [ 048/122] mac80211: fix read outside array bounds

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Message-Id: <20120807221952.533581233@linuxfoundation.org>
Date:	Tue,  7 Aug 2012 15:25:36 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Christian Lamparter <chunkeey@...glemail.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [ 048/122] mac80211: fix read outside array bounds

From: Greg KH <gregkh@...uxfoundation.org>

3.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christian Lamparter <chunkeey@...glemail.com>

commit 353d09c6ceedc1cb0c54fe5002c0ca80b6ee6e4f upstream.

ieee802_1d_to_ac is defined as a const int[8],
but the tid parameter has a range from 0 to 15.

Signed-off-by: Christian Lamparter <chunkeey@...glemail.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/mac80211/tx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2733,7 +2733,7 @@ EXPORT_SYMBOL(ieee80211_get_buffered_bc)
 void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
 			  struct sk_buff *skb, int tid)
 {
-	int ac = ieee802_1d_to_ac[tid];
+	int ac = ieee802_1d_to_ac[tid & 7];
 
 	skb_set_mac_header(skb, 0);
 	skb_set_network_header(skb, 0);


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