Wjjzhang

The issue is related to the `sdhci sdma transfer multi blocks` function in `hw/sd/sdhci.c`, which allows local OS guest privileged users to cause a denial of service. This can be achieved via vectors involving the transfer mode register during multi-block transfer, resulting in an infinite loop and QEMU process crash. The problem is associated with incorrect system resource management.

The issue is related to an infinite loop that could occur while receiving packets in `mcf fec receive`. A privileged user or process inside a guest could exploit this to crash the QEMU process on the host, leading to a denial of service (DoS).