scsi: megaraid_sas: megaraid_sas: Add check for count returned by HOST_DEVICE_LIST DCMD

Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Chandrakanth Patil <chandrakanth.patil@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_sas_base.c

@@ -4827,6 +4827,9 @@ megasas_host_device_list_query(struct megasas_instance *instance,
 		 */
 		count = le32_to_cpu(ci->count);
 
+		if (count > (MEGASAS_MAX_PD + MAX_LOGICAL_DRIVES_EXT))
+			break;
+
 		if (megasas_dbg_lvl & LD_PD_DEBUG)
 			dev_info(&instance->pdev->dev, "%s, Device count: 0x%x\n",
 				 __func__, count);