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Change History

In the Linux kernel, the following vulnerability has been resolved:

mm/hugetlb: fix memfd_pin_folios free_huge_pages leak

memfd_pin_folios followed by unpin_folios fails to restore free_huge_pages
if the pages were not already faulted in, because the folio refcount for
pages created by memfd_alloc_folio never goes to 0.  memfd_pin_folios
needs another folio_put to undo the folio_try_get below:

memfd_alloc_folio()
  alloc_hugetlb_folio_nodemask()
    dequeue_hugetlb_folio_nodemask()
      dequ

kernel.org https://git.kernel.org/stable/c/59e081ff2e91bbf19b8c1ecb75b031f778858383 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c56b6f3d801d7ec8965993342bdd9e2972b6cb8e [No types assigned]