On Tue, Apr 23, 2024 at 10:52:38AM -0700, Lokesh Gidra wrote:
> Commit d7a08838ab74 ("mm: userfaultfd: fix unexpected change to src_folio
> when UFFDIO_MOVE fails") moved the src_folio->{mapping, index} changing to
> after clearing the page-table and ensuring that it's not pinned. This
> avoids failure of swapout+migration and possibly memory corruption.
>
> However, the commit missed fixing it in the huge-page case.
>
> Link: https://lkml.kernel.org/r/20240404171726.2302435-1-lokeshgidra@xxxxxxxxxx
> Fixes: adef440691ba ("userfaultfd: UFFDIO_MOVE uABI")
> Signed-off-by: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
> Acked-by: David Hildenbrand <david@xxxxxxxxxx>
> Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> Cc: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
> Cc: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
> Cc: Nicolas Geoffray <ngeoffray@xxxxxxxxxx>
> Cc: Peter Xu <peterx@xxxxxxxxxx>
> Cc: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> (cherry picked from commit c0205eaf3af9f5db14d4b5ee4abacf4a583c3c50)
> Signed-off-by: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
Now queued up, thanks.
greg k-h
