On Thu, Aug 10, 2023 at 1:21 PM Axel Rasmussen <axelrasmussen@xxxxxxxxxx> wrote: > > A previous fixup to this commit fixed one issue, but introduced another: > we're now overly strict when validating the src address for UFFDIO_COPY. > > Most of the validation in validate_range is useful to apply to src as > well as dst, but page alignment is only a requirement for dst, not src. > So, split the function up so src can use an "unaligned" variant, while > still allowing us to share the majority of the code between the > different cases. > > Reported-by: Ryan Roberts <ryan.roberts@xxxxxxx> > Closes: https://lore.kernel.org/linux-mm/8fbb5965-28f7-4e9a-ac04-1406ed8fc2d4@xxxxxxx/T/#t > Signed-off-by: Axel Rasmussen <axelrasmussen@xxxxxxxxxx> Reviewed-by: Yu Zhao <yuzhao@xxxxxxxxxx>
