[PATCH V1 0/5] memfd-pin huge page fixes

[Steve Sistare <steven.sistare@oracle.com>]

Fix multiple bugs that occur when using memfd_pin_folios with hugetlb pages
and THP.  The hugetlb bugs only bite when the page is not yet faulted in
when memfd_pin_folios is called.  The THP bug bites when the starting offset
passed to memfd_pin_folios is not huge page aligned.  See the commit messages
for details.

Steve Sistare (5):
  mm/filemap: fix filemap_get_folios_contig THP panic
  mm/hugetlb: fix memfd_pin_folios free_huge_pages leak
  mm/hugetlb: fix memfd_pin_folios resv_huge_pages leak
  mm/gup: fix memfd_pin_folios hugetlb page allocation
  mm/gup: fix memfd_pin_folios alloc race panic

 include/linux/hugetlb.h | 10 ++++++++++
 mm/filemap.c            |  4 ++++
 mm/gup.c                |  5 ++++-
 mm/hugetlb.c            | 17 +++++++++++++++++
 mm/memfd.c              | 15 +++++++++------
 5 files changed, 44 insertions(+), 7 deletions(-)

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1.8.3.1