On 2020/11/18 下午4:59, Michael S. Tsirkin wrote:

On Wed, Nov 18, 2020 at 02:08:17PM +0800, Jason Wang wrote:

quoted

On 2020/10/26 上午10:59, Jason Wang wrote:

quoted

On 2020/10/23 下午11:34, Michael S. Tsirkin wrote:

quoted

On Fri, Oct 23, 2020 at 03:08:53PM +0300, Dan Carpenter wrote:

quoted

The copy_to/from_user() functions return the number of bytes which we
weren't able to copy but the ioctl should return -EFAULT if they fail.

Fixes: a127c5bbb6a8 ("vhost-vdpa: fix backend feature ioctls")
Signed-off-by: Dan Carpenter <redacted>

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Needed for stable I guess.

Agree.

Acked-by: Jason Wang <jasowang@redhat.com>

Hi Michael.

I don't see this in your tree, please consider to merge.

Thanks

I do see it there:

commit 7922460e33c81f41e0d2421417228b32e6fdbe94
Author: Dan Carpenter [off-list ref]
Date:   Fri Oct 23 15:08:53 2020 +0300

     vhost_vdpa: Return -EFAULT if copy_from_user() fails
     
the reason you can't find it is probably because I fixed up
a typo in the subject.

I see that.

Thanks