Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "11 patches.

  Subsystems affected by this patch series: mm (memcg, memory-failure,
  oom-kill, secretmem, vmalloc, hugetlb, damon, and tools), and ocfs2"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  tools/testing/selftests/vm/split_huge_page_test.c: fix application of sizeof to pointer
  mm/damon/core-test: fix wrong expectations for 'damon_split_regions_of()'
  mm: khugepaged: skip huge page collapse for special files
  mm, thp: bail out early in collapse_file for writeback page
  mm/vmalloc: fix numa spreading for large hash tables
  mm/secretmem: avoid letting secretmem_users drop to zero
  ocfs2: fix race between searching chunks and release journal_head from buffer_head
  mm/oom_kill.c: prevent a race between process_mrelease and exit_mmap
  mm: filemap: check if THP has hwpoisoned subpage for PMD page fault
  mm: hwpoison: remove the unnecessary THP check
  memcg: page_alloc: skip bulk allocator for __GFP_ACCOUNT

1 files changed, 9 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index adf9b9ef8277..c52be6d6b605 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3907,6 +3907,15 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page)
 		return ret;
 
 	/*
+	 * Just backoff if any subpage of a THP is corrupted otherwise
+	 * the corrupted page may mapped by PMD silently to escape the
+	 * check.  This kind of THP just can be PTE mapped.  Access to
+	 * the corrupted subpage should trigger SIGBUS as expected.
+	 */
+	if (unlikely(PageHasHWPoisoned(page)))
+		return ret;
+
+	/*
 	 * Archs like ppc64 need additional space to store information
 	 * related to pte entry. Use the preallocated table for that.
 	 */