From: Roel Kluin <roel.kluin@gmail.com>
Date: Sat, 25 Jul 2009 21:34:31 +0000 (+0200)
Subject: iwlwifi: Read outside array bounds
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=082e708acc50a5b625b9bde0bb1af90dfdbd1942;p=openwrt%2Fstaging%2Fblogic.git

iwlwifi: Read outside array bounds

tid is bounded (above) by the size of default_tid_to_tx_fifo (17 elements), but
the size of priv->stations[].tid[] is MAX_TID_COUNT (9) elements.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 5febb3186365..2e89040e63be 100644
--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -1171,6 +1171,8 @@ int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn)
 		IWL_ERR(priv, "Start AGG on invalid station\n");
 		return -ENXIO;
 	}
+	if (unlikely(tid >= MAX_TID_COUNT))
+		return -EINVAL;
 
 	if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
 		IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");