On Sat, Oct 10, 2020 at 10:32:13AM +0800, Jason Wang wrote: > > On 2020/10/3 下午6:02, Greg Kurz wrote: > > The open-coded computation of the used size doesn't take the event > > into account when the VIRTIO_RING_F_EVENT_IDX feature is present. > > Fix that by using vhost_get_used_size(). > > > > Signed-off-by: Greg Kurz <groug@xxxxxxxx> > > --- > > drivers/vhost/vhost.c | 3 +-- > > 1 file changed, 1 insertion(+), 2 deletions(-) > > > > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > > index c3b49975dc28..9d2c225fb518 100644 > > --- a/drivers/vhost/vhost.c > > +++ b/drivers/vhost/vhost.c > > @@ -1519,8 +1519,7 @@ static long vhost_vring_set_addr(struct vhost_dev *d, > > /* Also validate log access for used ring if enabled. */ > > if ((a.flags & (0x1 << VHOST_VRING_F_LOG)) && > > !log_access_ok(vq->log_base, a.log_guest_addr, > > - sizeof *vq->used + > > - vq->num * sizeof *vq->used->ring)) > > + vhost_get_used_size(vq, vq->num))) > > return -EINVAL; > > } > > > > > > Acked-by: Jason Wang <jasowang@xxxxxxxxxx> Linus already merged this, I can't add your ack, sorry!
