nl80211: Don't force VHT channel definition with HE

HE (802.11ax) is also supported on 2.4 GHz. And the 2.4 GHz band isn't
supposed to use VHT operations. Some codepaths in wpa_supplicant will
therefore not initialize the freq->bandwidth or the freq->center_freq1/2
members. As a result, the nl80211_put_freq_params() will directly return
an error (-1) or the kernel will return an error due to the invalid
channel definition.

Instead, the channel definitions should be created based on the actual
HT/VHT/none information on 2.4 GHz.

Fixes: ad9a1bfe78 ("nl80211: Share VHT channel configuration for HE")
Signed-off-by: Sven Eckelmann <seckelmann@datto.com>

src/drivers/driver_nl80211.c

@@ -4344,6 +4344,10 @@ fail:
 static int nl80211_put_freq_params(struct nl_msg *msg,
 				   const struct hostapd_freq_params *freq)
 {
+	enum hostapd_hw_mode hw_mode;
+	int is_24ghz;
+	u8 channel;
+
 	wpa_printf(MSG_DEBUG, "  * freq=%d", freq->freq);
 	if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq))
 		return -ENOBUFS;
@@ -4352,7 +4356,11 @@ static int nl80211_put_freq_params(struct nl_msg *msg,
 	wpa_printf(MSG_DEBUG, "  * vht_enabled=%d", freq->vht_enabled);
 	wpa_printf(MSG_DEBUG, "  * ht_enabled=%d", freq->ht_enabled);
 
-	if (freq->vht_enabled || freq->he_enabled) {
+	hw_mode = ieee80211_freq_to_chan(freq->freq, &channel);
+	is_24ghz = hw_mode == HOSTAPD_MODE_IEEE80211G ||
+		hw_mode == HOSTAPD_MODE_IEEE80211B;
+
+	if (freq->vht_enabled || (freq->he_enabled && !is_24ghz)) {
 		enum nl80211_chan_width cw;
 
 		wpa_printf(MSG_DEBUG, "  * bandwidth=%d", freq->bandwidth);