diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index d9a21d06b862..f8ffd9412ec5 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1795,14 +1795,17 @@ static int __split_huge_page_map(struct page *page, for (i = 0; i < HPAGE_PMD_NR; i++, haddr += PAGE_SIZE) { pte_t *pte, entry; BUG_ON(PageCompound(page+i)); + /* + * Note that pmd_numa is not transferred deliberately + * to avoid any possibility that pte_numa leaks to + * a PROT_NONE VMA by accident. + */ entry = mk_pte(page + i, vma->vm_page_prot); entry = maybe_mkwrite(pte_mkdirty(entry), vma); if (!pmd_write(*pmd)) entry = pte_wrprotect(entry); if (!pmd_young(*pmd)) entry = pte_mkold(entry); - if (pmd_numa(*pmd)) - entry = pte_mknuma(entry); pte = pte_offset_map(&_pmd, haddr); BUG_ON(!pte_none(*pte)); set_pte_at(mm, haddr, pte, entry); |