Merge tag 'mm-core-7.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/mm/coreHEADmaster

Pull core memory management fixes from David Hildenbrand:
 "Here's a bigger set of MM fixes that we didn't manage to have ready
  for -rc1. All fixes are stable-worthy; the majority fixes nasty
  long-standing bugs instead of being purely hotfixes.

  We have some more of these kinds of stable-worthy fixes in the
  pipeline, but we'll focus on the really urgent fixes as we get closer
  to the release.

  (Leaving urgent MM fixes lurking for various weeks is not good, but
  having too many changes close to the release is also not good, it's
  tricky ...)

  Most issues were reported by Anthropic. Others were found while
  reworking proposed fixes, and of course some of the fixes were just
  reported and fixed on the mailing list.

  All fixes were in linux-next for several days without changes. Some
  commit IDs changed recently when I had to drop some non-stable fixes,
  rebased to -rc1 and picked up more trailers.

  This includes fixes to:
   - THP (Transparent Huge Pages)
   - GUP (Get User Pages)
   - KSM (Kernel Samepage Merging)
   - USERFAULTFD
   - SHARED MEMORY (shmem/tmpfs/memfd)
   - HUGETLB
   - Core MM, PAGE CACHE and MEMORY RECLAIM

  The main changes are:

   - Prevent information leaks through memfd pinning, and out-of bounds
     writes in GUP.

   - Fix data loss in shmem, THP collapse, KSM and memfd pinning.

   - Fix corruption and reference-counting errors with huge PMD/PUD
     mappings, and incorrect TLB flushing and unmapping.

   - Fix various use-after-free bugs, deadlocks and unkillable loops,
     witha a focus on shmem swap handling.

   - Fix execution-seal enforcement for memfd (incl. hugetlb).

  Other changes fix accounting, quota and userfaultfd (un)registration
  handling"

* tag 'mm-core-7.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/mm/core: (61 commits)
  mm/gup: check folio->mapping under folio lock in memfd_pin_folios()
  khugepaged: fix readahead lock inversion in collapse_file()
  mm/huge_memory: set the mmu_gather page size in zap_huge_pud()
  mm/memory-tiers: unregister empty tiers outside memory_tier_lock
  mm/cma: don't release CMA pages still in use
  mm/vma: don't leak the charge for stack growth
  mm/huge_memory: split huge PUDs when adjusting VMA boundaries
  mm/vma: call ->may_split() before a partial merge
  mm/ksm: check large swap-cache folios before mapping them
  mm/ksm: fix use of a freed anon_vma at swap-in
  mm/ksm: reset the unstable trees of all nodes
  mm: fix deadlock of mremap() against UFFDIO_MOVE
  mm: fix unkillable fault loop on MAP_DROPPABLE memory
  mm: fix unmap_mapping_range() beyond 4 GiB on 32-bit
  mm/memory: reject remote COW faults on PFN mappings
  mm/madvise: fix data loss from MADV_FREE on a KSM page
  mm/mremap: fix moving PUD leaves
  mm/mremap: recheck PUDs under the page table lock
  mm/mremap: use pudp_huge_get_and_clear() when moving huge PUDs
  mm/mmu_notifier: set ->mm only after mmgrab()
  ...

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