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    SubjectRe: [PATCH v2 11/11] mm: SLUB hardened usercopy support
    On Wed, Jul 13, 2016 at 02:56:04PM -0700, Kees Cook wrote:
    > Under CONFIG_HARDENED_USERCOPY, this adds object size checking to the
    > SLUB allocator to catch any copies that may span objects. Includes a
    > redzone handling fix from Michael Ellerman.
    >
    > Based on code from PaX and grsecurity.
    >
    > Signed-off-by: Kees Cook <keescook@chromium.org>
    > ---
    > init/Kconfig | 1 +
    > mm/slub.c | 36 ++++++++++++++++++++++++++++++++++++
    > 2 files changed, 37 insertions(+)
    >
    > diff --git a/init/Kconfig b/init/Kconfig
    > index 798c2020ee7c..1c4711819dfd 100644
    > --- a/init/Kconfig
    > +++ b/init/Kconfig
    > @@ -1765,6 +1765,7 @@ config SLAB
    >
    > config SLUB
    > bool "SLUB (Unqueued Allocator)"
    > + select HAVE_HARDENED_USERCOPY_ALLOCATOR

    Should this patch come in earlier from a build perspective? I think
    patch 1 introduces and uses __check_heap_object.

    Balbir Singh.

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