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Re: [Xen-devel] [PATCH 29/29] drivers, xen: convert grant_map.users from atomic_t to refcount_t
- To: "Reshetova, Elena" <elena.reshetova@xxxxxxxxx>, "gregkh@xxxxxxxxxxxxxxxxxxx" <gregkh@xxxxxxxxxxxxxxxxxxx>
- From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
- Date: Wed, 8 Mar 2017 12:45:23 -0500
- Cc: "peterz@xxxxxxxxxxxxx" <peterz@xxxxxxxxxxxxx>, "linux-pci@xxxxxxxxxxxxxxx" <linux-pci@xxxxxxxxxxxxxxx>, "target-devel@xxxxxxxxxxxxxxx" <target-devel@xxxxxxxxxxxxxxx>, "linux1394-devel@xxxxxxxxxxxxxxxxxxxxx" <linux1394-devel@xxxxxxxxxxxxxxxxxxxxx>, "devel@xxxxxxxxxxxxxxxxxxxx" <devel@xxxxxxxxxxxxxxxxxxxx>, "linux-s390@xxxxxxxxxxxxxxx" <linux-s390@xxxxxxxxxxxxxxx>, "linux-scsi@xxxxxxxxxxxxxxx" <linux-scsi@xxxxxxxxxxxxxxx>, "linux-serial@xxxxxxxxxxxxxxx" <linux-serial@xxxxxxxxxxxxxxx>, "fcoe-devel@xxxxxxxxxxxxx" <fcoe-devel@xxxxxxxxxxxxx>, Hans Liljestrand <ishkamiel@xxxxxxxxx>, "open-iscsi@xxxxxxxxxxxxxxxx" <open-iscsi@xxxxxxxxxxxxxxxx>, "linux-media@xxxxxxxxxxxxxxx" <linux-media@xxxxxxxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, "linux-raid@xxxxxxxxxxxxxxx" <linux-raid@xxxxxxxxxxxxxxx>, "linux-bcache@xxxxxxxxxxxxxxx" <linux-bcache@xxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, David Windsor <dwindsor@xxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, "netdev@xxxxxxxxxxxxxxx" <netdev@xxxxxxxxxxxxxxx>, "linux-usb@xxxxxxxxxxxxxxx" <linux-usb@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "devel@xxxxxxxxxxxxxxxxxxxxxx" <devel@xxxxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 08 Mar 2017 17:45:01 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
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@xxxxxxxxx>
>>> Signed-off-by: Hans Liljestrand <ishkamiel@xxxxxxxxx>
>>> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
>>> Signed-off-by: David Windsor <dwindsor@xxxxxxxxx>
>>> ---
>>> drivers/xen/gntdev.c | 11 ++++++-----
>>> 1 file changed, 6 insertions(+), 5 deletions(-)
>> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> 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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