RE: [Xen-devel] [PATCH 29/29] drivers, xen: convert grant_map.users from atomic_t to refcount_t

Reshetova, Elena
2017-03-09T07:19:12Z

> On 03/08/2017 08:49 AM, Reshetova, Elena wrote:
> >> On 03/06/2017 09:21 AM, Elena Reshetova wrote:
> >>> refcount_t type and corresponding API should be
> >>> used instead of atomic_t when the variable is used as
> >>> a reference counter. This allows to avoid accidental
> >>> refcounter overflows that might lead to use-after-free
> >>> situations.
> >>>
> >>> Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
> >>> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
> >>> Signed-off-by: Kees Cook <keescook@chromium.org>
> >>> Signed-off-by: David Windsor <dwindsor@gmail.com>
> >>> ---
> >>> drivers/xen/gntdev.c | 11 ++++++-----
> >>> 1 file changed, 6 insertions(+), 5 deletions(-)
> >> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> > Is there a tree that can take this change? Turns out it is better to propagate
> changes via separate trees and only leftovers can be taken via Greg's tree.
> >
>
> Sure, we can take it via Xen tree for rc3.

Thank you very much!

Best Regards,
Elena.

>
> -boris