CVE-2021-47047

A flaw was found in the Linux kernel, where the spi controller supports 44-bit address space on AXI in DMA mode. Set the dma_addr_t width to 44-bit to avoid using a swiotlb mapping. In addition, if dma_map_single fails, it should immediately return instead of continuing the DMA operation, which is based on an invalid address.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.