On Mon, 12 Jul 2021 16:32:07 +0100 "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> wrote: > Rewrite copy_huge_page() and move it into mm/util.c so it's always > available. Fixes an exposure of uninitialised memory on configurations > with HUGETLB and UFFD enabled and MIGRATION disabled. Wait. Exposing uninitialized memory is serious. Can we please include full info on this flaw and decide whether a -stable backport is justified? If not, why not, etc?