On Mon, May 25, 2026 at 04:19:43PM +0100, Kiryl Shutsemau wrote: > On Mon, May 25, 2026 at 12:11:11PM +0000, [email protected] wrote: > > Thank you for your contribution! Sashiko AI review found 1 potential > > issue(s) to consider: > > > > Pre-existing issues: > > - [High] Page tables are accessed and modified under mmap_write_lock > > without first draining per-VMA lock holders via vma_start_write(), > > risking races with concurrent per-VMA readers. > > Confirmed and pre-existing -- the pre-patch path called uffd_wp_range() > which has the same gap (no vma_start_write() before change_protection() > either). Will address in a follow-up that audits the userfaultfd > register/unregister paths together.
Looking again, this is false alarm. PTL provides enough serialization here. No change needed. -- Kiryl Shutsemau / Kirill A. Shutemov
