40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
From 2504a6423b9ab4c36df78227055995644de19edb Mon Sep 17 00:00:00 2001
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From: Pavel Roskin <proski@gnu.org>
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Date: Sat, 11 Feb 2012 10:01:53 -0500
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Subject: [PATCH] ath9k: stop on rates with idx -1 in ath9k rate control's
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.tx_status
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Rate control algorithms are supposed to stop processing when they
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encounter a rate with the index -1. Checking for rate->count not being
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zero is not enough.
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Allowing a rate with negative index leads to memory corruption in
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ath_debug_stat_rc().
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One consequence of the bug is discussed at
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https://bugzilla.redhat.com/show_bug.cgi?id=768639
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Signed-off-by: Pavel Roskin <proski@gnu.org>
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Cc: stable@vger.kernel.org
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Signed-off-by: John W. Linville <linville@tuxdriver.com>
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---
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drivers/net/wireless/ath/ath9k/rc.c | 2 +-
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1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c
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index 635b592..a427a16 100644
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--- a/drivers/net/wireless/ath/ath9k/rc.c
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+++ b/drivers/net/wireless/ath/ath9k/rc.c
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@@ -1346,7 +1346,7 @@ static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
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fc = hdr->frame_control;
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for (i = 0; i < sc->hw->max_rates; i++) {
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struct ieee80211_tx_rate *rate = &tx_info->status.rates[i];
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- if (!rate->count)
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+ if (rate->idx < 0 || !rate->count)
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break;
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final_ts_idx = i;
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--
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1.7.4.4
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