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Emil Velikov

2019-May-27 08:17 UTC

[PATCH 12/13] drm/virtio: drop DRM_AUTH usage from the driver

From: Emil Velikov <emil.velikov at collabora.com>

The authentication can be circumvented, by design, by using the render
node.
>From the driver POV there is no distinction between primary and rendernodes, thus we can drop the token.

Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: virtualization at lists.linux-foundation.org
Cc: David Airlie <airlied at linux.ie>
Cc: Daniel Vetter <daniel at ffwll.ch>
Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
---
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index 949a264985fc..e72626faba52 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -553,34 +553,34 @@ static int virtio_gpu_get_caps_ioctl(struct drm_device
*dev,
 
 struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = {
 	DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 
 	DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 
 	DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 
 	DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE,
 			  virtio_gpu_resource_create_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 
 	DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO, virtio_gpu_resource_info_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 
 	/* make transfer async to the main ring? - no sure, can we
 	 * thread these in the underlying GL
 	 */
 	DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST,
 			  virtio_gpu_transfer_from_host_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST,
 			  virtio_gpu_transfer_to_host_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 
 	DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 
 	DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl,
-			  DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
+			  DRM_UNLOCKED | DRM_RENDER_ALLOW),
 };
-- 
2.21.0

Emil Velikov

2019-Jun-06 10:59 UTC

head link

[PATCH 12/13] drm/virtio: drop DRM_AUTH usage from the driver

On Mon, 27 May 2019 at 09:19, Emil Velikov <emil.l.velikov at gmail.com>
wrote:>
> From: Emil Velikov <emil.velikov at collabora.com>
>
> The authentication can be circumvented, by design, by using the render
> node.
>
> From the driver POV there is no distinction between primary and render
> nodes, thus we can drop the token.
>
> Cc: Gerd Hoffmann <kraxel at redhat.com>
> Cc: virtualization at lists.linux-foundation.org
> Cc: David Airlie <airlied at linux.ie>
> Cc: Daniel Vetter <daniel at ffwll.ch>
> Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
> ---
>  drivers/gpu/drm/virtio/virtgpu_ioctl.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> index 949a264985fc..e72626faba52 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> @@ -553,34 +553,34 @@ static int virtio_gpu_get_caps_ioctl(struct
drm_device *dev,
>
>  struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS] = {
>         DRM_IOCTL_DEF_DRV(VIRTGPU_MAP, virtio_gpu_map_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>
>         DRM_IOCTL_DEF_DRV(VIRTGPU_EXECBUFFER, virtio_gpu_execbuffer_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>
>         DRM_IOCTL_DEF_DRV(VIRTGPU_GETPARAM, virtio_gpu_getparam_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>
>         DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_CREATE,
>                           virtio_gpu_resource_create_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>
>         DRM_IOCTL_DEF_DRV(VIRTGPU_RESOURCE_INFO,
virtio_gpu_resource_info_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>
>         /* make transfer async to the main ring? - no sure, can we
>          * thread these in the underlying GL
>          */
>         DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_FROM_HOST,
>                           virtio_gpu_transfer_from_host_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>         DRM_IOCTL_DEF_DRV(VIRTGPU_TRANSFER_TO_HOST,
>                           virtio_gpu_transfer_to_host_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>
>         DRM_IOCTL_DEF_DRV(VIRTGPU_WAIT, virtio_gpu_wait_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>
>         DRM_IOCTL_DEF_DRV(VIRTGPU_GET_CAPS, virtio_gpu_get_caps_ioctl,
> -                         DRM_AUTH | DRM_UNLOCKED | DRM_RENDER_ALLOW),
> +                         DRM_UNLOCKED | DRM_RENDER_ALLOW),
>  };
> --
> 2.21.0
>
Humble poke?

Thanks,
Emil

Gerd Hoffmann

2019-Jun-13 07:00 UTC

head link

[PATCH 12/13] drm/virtio: drop DRM_AUTH usage from the driver

On Thu, Jun 06, 2019 at 11:59:15AM +0100, Emil Velikov
wrote:> On Mon, 27 May 2019 at 09:19, Emil Velikov <emil.l.velikov at
gmail.com> wrote:
> >
> > From: Emil Velikov <emil.velikov at collabora.com>
> >
> > The authentication can be circumvented, by design, by using the render
> > node.
> >
> > From the driver POV there is no distinction between primary and render
> > nodes, thus we can drop the token.
> >
> > Cc: Gerd Hoffmann <kraxel at redhat.com>
> > Cc: virtualization at lists.linux-foundation.org
> > Cc: David Airlie <airlied at linux.ie>
> > Cc: Daniel Vetter <daniel at ffwll.ch>
> > Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
Acked-by: Gerd Hoffmann <kraxel at redhat.com>

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