I'm trying to render an invoice for a user while at the same time attaching it to the applicable records in our database.
My current structure for the method is as follows:

public PageReference processSelection(){
        List<ID> batchList = new List<ID>();
                
        containerList = new List<ContractWrapper>();
        updateList = new List<MG_Contract_Holder__c>();
        MG_Contract_Holder__c updCon = new MG_Contract_Holder__c();
        if(tContractList.size() > 0){
        	containerList.addall(tContractList);
        	}
        if(twcContractList.size() > 0){
        	containerList.addall(twcContractList);
        	}
        if(gapContractList.size() > 0){
        	containerList.addall(gapContractList);
        	}
        if(mppContractList.size() > 0){
        	containerList.addall(mppContractList);
        	}
        if(wsContractList.size() > 0){
        	containerList.addall(wsContractList);
        	}
        if(upppcContractList.size() > 0){
        	containerList.addall(upppcContractList);
        	}
        if(upppContractList.size() > 0){
        	containerList.addall(upppContractList);
        	}
        if(uppContractList.size() > 0){
        	containerList.addall(uppContractList);
        	}
        if(sealContractList.size() > 0){
        	containerList.addall(sealContractList);
        	}
        if(pdrContractList.size() > 0){
        	containerList.addall(pdrContractList);
        	}
        if(mpppcContractList.size() > 0){
        	containerList.addall(mpppcContractList);
        	}
        if(mpppContractList.size() > 0){
        	containerList.addall(mpppContractList);
        	}
        if(keyContractList.size() > 0){
        	containerList.addall(keyContractList);
        	}
        if(keyplContractList.size() > 0){
        	containerList.addall(keyplContractList);
        	}
        if(etchContractList.size() > 0){
        	containerList.addall(etchContractList);
        	}
        		
        Integer selectedCount2 = 0;
		
		for(contractWrapper sub : containerList){
            if(!sub.selected){
                continue;
                }
            if(sub.selected == true){
                selectedCount2++;
                }
            if(selectedCount2 > 0){
                subNum = sub.subNum;
                subVin = sub.subVin;
                system.debug('subNum: ' + subNum);
                system.debug('subVin: ' + subVin);
                updCon = [SELECT Contract_Status__c, Batch__c FROM MG_Contract_Holder__c WHERE Contract_Number__c =:subNum AND Vin_Number__c =:subVin];
                batchList.add(updCon.Batch__c);
                system.debug('updCon');
                updCon.Contract_Status__c = 'Submitted - Pending Payment';
                updateList.add(updCon);
                }
                }
            if(selectedCount2 == 0){
                ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR, 'You must select at least one record to submit before proceeding.'));
                return null;
                }
                update updateList;
                
                Set<ID> myset = new Set<ID>();
				List<ID> result = new List<ID>();
				myset.addAll(batchList);
				result.addAll(myset);
    			PageReference page = new PageReference('/apex/pages/CM_RemitReport');                
                page.setRedirect(true);
    			for(integer i = 0; i < result.size(); i++){
    				Attachment attach = new Attachment();
        			Blob body;
        			body = page.getContent();
        			attach.Body = body;
        			attach.Name = 'RemitRegister.pdf';
        			attach.ParentId = result[i];
        			insert attach;
        			}
    			return page;
                }

However, I hit an error on the line:
body = page.getContent();
which is: Exception common.page.PageInterruptException, Cyclical server-side forwards detected
and I'm having trouble resolving it.
Any suggestions would be appreciated.