wifi: cfg80211: validate HE operation element parsing

Validate that the HE operation element has the correct
length before parsing it.

Cc: stable@vger.kernel.org
Fixes: 645f3d85 ("wifi: cfg80211: handle UHB AP and STA power type")
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240523120533.677025eb4a92.I44c091029ef113c294e8fe8b9bf871bf5dbeeb27@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/scan.c

@@ -2128,7 +2128,8 @@ static bool cfg80211_6ghz_power_type_valid(const u8 *ie, size_t ielen,
 	struct ieee80211_he_operation *he_oper;
 
 	tmp = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, ielen);
-	if (tmp && tmp->datalen >= sizeof(*he_oper) + 1) {
+	if (tmp && tmp->datalen >= sizeof(*he_oper) + 1 &&
+	    tmp->datalen >= ieee80211_he_oper_size(tmp->data + 1)) {
 		const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
 
 		he_oper = (void *)&tmp->data[1];