Cc: kernel-hardening@xxxxxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Christoph Hellwig <hch@xxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Christopher Lameter <cl@xxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>