cfg80211: Validate legacy rateset.

Legacy rates are not validated while configuring
tx rateset using iw. So below cmd is accepted by nl80211.
sudo iw wlan2 set bitrates legacy-2.4 1 2 3

Validate legacy rates and return
error if any rate in the rateset is not valid.

Signed-off-by: Bala Shanmugam <bkamatch@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index bcf6f70e518d..140c1d291d4e 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -5577,6 +5577,9 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
                                 sband,
                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
+                        if ((mask.control[band].legacy == 0) &&
+                            nla_len(tb[NL80211_TXRATE_LEGACY]))
+                                return -EINVAL;
                 }
                 if (tb[NL80211_TXRATE_MCS]) {
                         if (!ht_rateset_to_mask(