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authorJohannes Berg <johannes.berg@intel.com>2015-08-21 15:07:13 +0300
committerJohannes Berg <johannes.berg@intel.com>2015-09-22 16:19:48 +0300
commit2df1b131b54f431877a6665139dac805ba5ce1a5 (patch)
tree1d3d5cfe6ec5cbc2211ca02c835b92ef45ba293c /net/mac80211
parentef9be10c8c999e00b239eec24cf01952a308f8e7 (diff)
downloadlinux-2df1b131b54f431877a6665139dac805ba5ce1a5.tar.xz
mac80211: fix VHT MCS mask array overrun
The HT MCS mask has 9 bytes, the VHT one only has 8 streams. Split the loops to handle this correctly. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/cfg.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 17b1fe961c5d..a30ec3ce3d25 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2518,15 +2518,17 @@ static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
continue;
for (j = 0; j < IEEE80211_HT_MCS_MASK_LEN; j++) {
- if (~sdata->rc_rateidx_mcs_mask[i][j])
+ if (~sdata->rc_rateidx_mcs_mask[i][j]) {
sdata->rc_has_mcs_mask[i] = true;
+ break;
+ }
+ }
- if (~sdata->rc_rateidx_vht_mcs_mask[i][j])
+ for (j = 0; j < NL80211_VHT_NSS_MAX; j++) {
+ if (~sdata->rc_rateidx_vht_mcs_mask[i][j]) {
sdata->rc_has_vht_mcs_mask[i] = true;
-
- if (sdata->rc_has_mcs_mask[i] &&
- sdata->rc_has_vht_mcs_mask[i])
break;
+ }
}
}