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mac80211: avoid using uninitialized stack data 

Avoid a case where we would access uninitialized stack data if the AP
advertises HT support without 40MHz channel support.

Cc: stable@vger.kernel.org
Fixes: f3000e1b43 ("mac80211: fix broken use of VHT/20Mhz with some APs")
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Jes Sorensen 2014-12-10 14:14:07 -05:00 committed by Johannes Berg
parent 5fbea33740
commit 7e6225a160
1 changed files with 1 additions and 0 deletions
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1
net/mac80211/mlme.c
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@ -174,6 +174,7 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
if (!(ht_cap->cap_info &
cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
ret = IEEE80211_STA_DISABLE_40MHZ;
vht_chandef = *chandef;
goto out;
}