linux-kernel - [PATCH 1/2] mac80211: minstrel, fix memory corruption

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Message-Id: <1241453096-8517-1-git-send-email-jirislaby@gmail.com>
Date:	Mon,  4 May 2009 18:04:55 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	johannes@...solutions.net
Cc:	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jiri Slaby <jirislaby@...il.com>,
	Felix Fietkau <nbd@...nwrt.org>
Subject: [PATCH 1/2] mac80211: minstrel, fix memory corruption

minstrel doesn't count max rate count in fact, since it doesn't use
a loop variable `i' and hence allocs space only for bitrates found in
the first band.

Fix it by involving the `i' as an index so that it traverses all the
bands now and finds the real max bitrate count.

Signed-off-by: Jiri Slaby <jirislaby@...il.com>
Cc: Felix Fietkau <nbd@...nwrt.org>
---
 net/mac80211/rc80211_minstrel.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index 3824990..70df3dc 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -476,7 +476,7 @@ minstrel_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
 		return NULL;
 
 	for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
-		sband = hw->wiphy->bands[hw->conf.channel->band];
+		sband = hw->wiphy->bands[i];
 		if (sband->n_bitrates > max_rates)
 			max_rates = sband->n_bitrates;
 	}
-- 
1.6.2.4

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