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| author | Pavel Roskin <proski@gnu.org> | 2012-02-11 10:01:53 -0500 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-02-15 13:56:15 -0500 |
| commit | 2504a6423b9ab4c36df78227055995644de19edb (patch) | |
| tree | 911bd00987bca9db89a40874ad44ae956e024b5d /drivers | |
| parent | 6670f15b1f6858a43b292d8ab64464e9f085a6aa (diff) | |
| download | linux-2504a6423b9ab4c36df78227055995644de19edb.tar.gz linux-2504a6423b9ab4c36df78227055995644de19edb.tar.bz2 linux-2504a6423b9ab4c36df78227055995644de19edb.zip | |
ath9k: stop on rates with idx -1 in ath9k rate control's .tx_status
Rate control algorithms are supposed to stop processing when they
encounter a rate with the index -1. Checking for rate->count not being
zero is not enough.
Allowing a rate with negative index leads to memory corruption in
ath_debug_stat_rc().
One consequence of the bug is discussed at
https://bugzilla.redhat.com/show_bug.cgi?id=768639
Signed-off-by: Pavel Roskin <proski@gnu.org>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/rc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c index 635b592ad961..a427a16bb739 100644 --- a/drivers/net/wireless/ath/ath9k/rc.c +++ b/drivers/net/wireless/ath/ath9k/rc.c @@ -1346,7 +1346,7 @@ static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband, fc = hdr->frame_control; for (i = 0; i < sc->hw->max_rates; i++) { struct ieee80211_tx_rate *rate = &tx_info->status.rates[i]; - if (!rate->count) + if (rate->idx < 0 || !rate->count) break; final_ts_idx = i; |