static int arcmsr_resume(struct pci_dev *pdev)
{
	int error;
	struct Scsi_Host *host = pci_get_drvdata(pdev);
	struct AdapterControlBlock *acb =
		(struct AdapterControlBlock *)host->hostdata;

	pci_set_power_state(pdev, PCI_D0);
	pci_enable_wake(pdev, PCI_D0, 0);
	pci_restore_state(pdev);
	if (pci_enable_device(pdev)) {
		pr_warn("%s: pci_enable_device error\n", __func__);
		return -ENODEV;
	}
	error = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
	if (error) {
		error = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
		if (error) {
			pr_warn("scsi%d: No suitable DMA mask available\n",
			       host->host_no);
			goto controller_unregister;
		}
	}
	pci_set_master(pdev);
	if (arcmsr_request_irq(pdev, acb) == FAILED)
		goto controller_stop;
	arcmsr_iop_init(acb);
	INIT_WORK(&acb->arcmsr_do_message_isr_bh, arcmsr_message_isr_bh_fn);
	atomic_set(&acb->rq_map_token, 16);
	atomic_set(&acb->ante_token_value, 16);
	acb->fw_flag = FW_NORMAL;
	init_timer(&acb->eternal_timer);
	acb->eternal_timer.expires = jiffies + msecs_to_jiffies(6 * HZ);
	acb->eternal_timer.data = (unsigned long) acb;
	acb->eternal_timer.function = &arcmsr_request_device_map;
	add_timer(&acb->eternal_timer);
	return 0;
controller_stop:
	arcmsr_stop_adapter_bgrb(acb);
	arcmsr_flush_adapter_cache(acb);
controller_unregister:
	scsi_remove_host(host);
	arcmsr_free_ccb_pool(acb);
	arcmsr_unmap_pciregion(acb);
	pci_release_regions(pdev);
	scsi_host_put(host);
	pci_disable_device(pdev);
	return -ENODEV;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.