static void arcmsr_hbaC_postqueue_isr(struct AdapterControlBlock *acb)
{
	struct MessageUnit_C __iomem *phbcmu;
	struct ARCMSR_CDB *arcmsr_cdb;
	struct CommandControlBlock *ccb;
	uint32_t flag_ccb, ccb_cdb_phy, throttling = 0;
	int error;

	phbcmu = acb->pmuC;
	/* areca cdb command done */
	/* Use correct offset and size for syncing */

	while ((flag_ccb = readl(&phbcmu->outbound_queueport_low)) !=
			0xFFFFFFFF) {
		ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);
		arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset
			+ ccb_cdb_phy);
		ccb = container_of(arcmsr_cdb, struct CommandControlBlock,
			arcmsr_cdb);
		error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1)
			? true : false;
		/* check if command done with no error */
		arcmsr_drain_donequeue(acb, ccb, error);
		throttling++;
		if (throttling == ARCMSR_HBC_ISR_THROTTLING_LEVEL) {
			writel(ARCMSR_HBCMU_DRV2IOP_POSTQUEUE_THROTTLING,
				&phbcmu->inbound_doorbell);
			throttling = 0;
		}
	}
}

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.