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mac80211: off by one in mcs mask handling 

"ridx" is used as an index into the mcs_mask[] array which has
IEEE80211_HT_MCS_MASK_LEN elements.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Dan Carpenter 2012-02-01 10:42:11 +03:00 committed by John W. Linville
parent d486a5b499
commit 910570b5f4
2 changed files with 2 additions and 2 deletions
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2
net/mac80211/rate.c
View File

@ -324,7 +324,7 @@ static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate,
rbit = rate->idx % 8;
/* sanity check */
if (ridx < 0 || ridx > IEEE80211_HT_MCS_MASK_LEN)
if (ridx < 0 || ridx >= IEEE80211_HT_MCS_MASK_LEN)
return false;
/* See whether the selected rate or anything below it is allowed. */

2
net/wireless/nl80211.c
View File

@ -5410,7 +5410,7 @@ static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
rbit = BIT(rates[i] % 8);
/* check validity */
if ((ridx < 0) || (ridx > IEEE80211_HT_MCS_MASK_LEN))
if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
return false;
/* check availability */