qcacmn: Fix OOB read of ML IE

In util_get_bvmlie_bssparamchangecnt() and util_get_bvmlie_mldcap(),
fix the possible OOB read of the ML IE, if the ML IE length is less
than the minimum template of Basic variant ML probe response.

Change-Id: I50efaba682a1e42ef8befe09224edc34de9c8c7b
CRs-Fixed: 3700045

umac/mlo_mgr/src/utils_mlo.c

@@ -4057,6 +4057,27 @@ util_find_mlie(uint8_t *buf, qdf_size_t buflen, uint8_t **mlieseq,
 	return QDF_STATUS_SUCCESS;
 }
 
+static inline QDF_STATUS
+util_validate_bv_mlie_min_seq_len(qdf_size_t mlieseqlen)
+{
+	qdf_size_t parsed_len = sizeof(struct wlan_ie_multilink);
+
+	if (mlieseqlen < parsed_len + WLAN_ML_BV_CINFO_LENGTH_SIZE) {
+		mlo_err_rl("ML seq payload of len %zu doesn't accommodate the mandatory BV ML IE Common info len field",
+			   mlieseqlen);
+		return QDF_STATUS_E_PROTO;
+	}
+	parsed_len += WLAN_ML_BV_CINFO_LENGTH_SIZE;
+
+	if (mlieseqlen < parsed_len + QDF_MAC_ADDR_SIZE) {
+		mlo_err_rl("ML seq payload of len %zu doesn't accommodate the mandatory MLD addr",
+			   mlieseqlen);
+		return QDF_STATUS_E_PROTO;
+	}
+
+	return QDF_STATUS_SUCCESS;
+}
+
 QDF_STATUS
 util_find_mlie_by_variant(uint8_t *buf, qdf_size_t buflen, uint8_t **mlieseq,
 			  qdf_size_t *mlieseqlen, int variant)
@@ -4195,6 +4216,9 @@ util_get_bvmlie_bssparamchangecnt(uint8_t *mlieseq, qdf_size_t mlieseqlen,
 	presencebitmap = QDF_GET_BITS(mlcontrol, WLAN_ML_CTRL_PBM_IDX,
 				      WLAN_ML_CTRL_PBM_BITS);
 
+	if (QDF_IS_STATUS_ERROR(util_validate_bv_mlie_min_seq_len(mlieseqlen)))
+		return QDF_STATUS_E_INVAL;
+
 	commoninfo = mlieseq + sizeof(struct wlan_ie_multilink);
 	commoninfolen = *(mlieseq + sizeof(struct wlan_ie_multilink));
 
@@ -4584,6 +4608,9 @@ util_get_bvmlie_mldcap(uint8_t *mlieseq, qdf_size_t mlieseqlen,
 	presencebitmap = QDF_GET_BITS(mlcontrol, WLAN_ML_CTRL_PBM_IDX,
 				      WLAN_ML_CTRL_PBM_BITS);
 
+	if (QDF_IS_STATUS_ERROR(util_validate_bv_mlie_min_seq_len(mlieseqlen)))
+		return QDF_STATUS_E_INVAL;
+
 	commoninfo = mlieseq + sizeof(struct wlan_ie_multilink);
 	commoninfo_len = *(mlieseq + sizeof(struct wlan_ie_multilink));
 	/* mldcap_offset stores the offset of MLD Capabilities within