static int b43_dmacontroller_rx_reset(struct b43_wldev *dev, u16 mmio_base,
				      enum b43_dmatype type)
{
	int i;
	u32 value;
	u16 offset;

	might_sleep();

	offset = (type == B43_DMA_64BIT) ? B43_DMA64_RXCTL : B43_DMA32_RXCTL;
	b43_write32(dev, mmio_base + offset, 0);
	for (i = 0; i < 10; i++) {
		offset = (type == B43_DMA_64BIT) ? B43_DMA64_RXSTATUS :
						   B43_DMA32_RXSTATUS;
		value = b43_read32(dev, mmio_base + offset);
		if (type == B43_DMA_64BIT) {
			value &= B43_DMA64_RXSTAT;
			if (value == B43_DMA64_RXSTAT_DISABLED) {
				i = -1;
				break;
			}
		} else {
			value &= B43_DMA32_RXSTATE;
			if (value == B43_DMA32_RXSTAT_DISABLED) {
				i = -1;
				break;
			}
		}
		msleep(1);
	}
	if (i != -1) {
		b43err(dev->wl, "DMA RX reset timed out\n");
		return -ENODEV;
	}

	return 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.