drm: Check mode object lease status in all master ioctl paths [v4]
Attempts to modify un-leased objects are rejected with an error.
Information returned about unleased objects is modified to make them
appear unusable and/or disconnected.
Changes for v2 as suggested by Daniel Vetter <daniel.vetter@ffwll.ch>:
* With the change in the __drm_mode_object_find API to pass the
file_priv along, we can now centralize most of the lease-based
access checks in that function.
* A few places skip that API and require in-line checks.
Changes for v3 provided by Dave Airlie <airlied@redhat.com>
* remove support for leasing encoders.
* add support for leasing planes.
Changes for v4
* Only call drm_lease_held if DRIVER_MODESET.
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index 919e78d..cda8bfa 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -122,10 +122,12 @@
count = 0;
crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
drm_for_each_crtc(crtc, dev) {
- if (count < card_res->count_crtcs &&
- put_user(crtc->base.id, crtc_id + count))
- return -EFAULT;
- count++;
+ if (drm_lease_held(file_priv, crtc->base.id)) {
+ if (count < card_res->count_crtcs &&
+ put_user(crtc->base.id, crtc_id + count))
+ return -EFAULT;
+ count++;
+ }
}
card_res->count_crtcs = count;
@@ -143,12 +145,14 @@
count = 0;
connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
drm_for_each_connector_iter(connector, &conn_iter) {
- if (count < card_res->count_connectors &&
- put_user(connector->base.id, connector_id + count)) {
- drm_connector_list_iter_end(&conn_iter);
- return -EFAULT;
+ if (drm_lease_held(file_priv, connector->base.id)) {
+ if (count < card_res->count_connectors &&
+ put_user(connector->base.id, connector_id + count)) {
+ drm_connector_list_iter_end(&conn_iter);
+ return -EFAULT;
+ }
+ count++;
}
- count++;
}
card_res->count_connectors = count;
drm_connector_list_iter_end(&conn_iter);