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    Subject[PATCH 31/34] x86: handle pgtable_page_ctor() fail
    Date
    Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    ---
    arch/x86/mm/pgtable.c | 8 ++++++--
    1 file changed, 6 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
    index 1a7d21342e..a7cccb6d7f 100644
    --- a/arch/x86/mm/pgtable.c
    +++ b/arch/x86/mm/pgtable.c
    @@ -25,8 +25,12 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
    struct page *pte;

    pte = alloc_pages(__userpte_alloc_gfp, 0);
    - if (pte)
    - pgtable_page_ctor(pte);
    + if (!pte)
    + return NULL;
    + if (!pgtable_page_ctor(pte)) {
    + __free_page(pte);
    + return NULL;
    + }
    return pte;
    }

    --
    1.8.4.rc3


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