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

Boris Ostrovsky
2017-03-08T17:45:23Z

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-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>>> Signed-off-by: Hans Liljestrand <ishkamiel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>>> Signed-off-by: Kees Cook <keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
>>> Signed-off-by: David Windsor <dwindsor-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>>> ---
>>> drivers/xen/gntdev.c | 11 ++++++-----
>>> 1 file changed, 6 insertions(+), 5 deletions(-)
>> Reviewed-by: Boris Ostrovsky <boris.ostrovsky-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
> 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.

-boris

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