On Thu, 23 Sep 2021 19:25:12 -0400 Peter Xu <peterx@xxxxxxxxxx> wrote: > In RHEL's gating selftests we've encountered memory corruption in the uffd > event test even with upstream kernel: > > ... > > > We can mark the Fixes tag upon 0db282ba2c12 as it's reported to only happen > there, however the real "Fixes" IMHO should be 8ba6e8640844, as before that > commit we'll always do explicit release_pages() before registration of uffd, > and 8ba6e8640844 changed that logic by adding extra unmap/map and we didn't > release the pages at the right place. Meanwhile I don't have a solid glue > anyway on whether posix_memalign() could always avoid triggering this bug, > hence it's safer to attach this fix to commit 8ba6e8640844. > Thanks. I added a cc:stable to this. I don't think we want selftests in older kernels to be falsely reporting kernel bugs?
