On Mon, May 25, 2026 at 04:07:15PM +0100, Kiryl Shutsemau wrote: > On Mon, May 25, 2026 at 12:08:19PM +0000, [email protected] wrote: > > Pre-existing issues: > > - [High] Failure to write-protect the destination PTE in > > copy_present_page() completely bypasses UFFD_WP tracking for pinned > > pages. > > Confirmed and pre-existing -- copy_present_page() builds the dest PTE > with maybe_mkwrite(pte_mkdirty(pte), dst_vma) and only adds the UFFD > bit, never wrprotects. Will address in a separate fix after this > series.
Looking closer, this is false alarm. pte_mkuffd() makes the PTE write-protected. No change needed. -- Kiryl Shutsemau / Kirill A. Shutemov
