CVE-2026-80831 crypto: mxs-dcp - fix source scatterlist length access

In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - fix source scatterlist length access mxsdcpaesblockcrypt uses sgdmalen without mapping the source scatterlist with dmamapsg first. Therefore, sgdmalen is invalid and could return zero or a stale DMA length,...