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authorKeith Packard <keithp@keithp.com>2017-04-10 07:35:34 +0300
committerDave Airlie <airlied@redhat.com>2017-10-25 09:31:30 +0300
commit7de440db20d4531e4b740bf17b56afc426c54377 (patch)
treef260b946f2d43023266e721903b99f523c2a944d /drivers/gpu/drm
parent2ed077e467eedb033032bc4b6e349365517662d6 (diff)
downloadlinux-7de440db20d4531e4b740bf17b56afc426c54377.tar.xz
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>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/drm_auth.c2
-rw-r--r--drivers/gpu/drm/drm_encoder.c5
-rw-r--r--drivers/gpu/drm/drm_mode_config.c22
-rw-r--r--drivers/gpu/drm/drm_mode_object.c22
-rw-r--r--drivers/gpu/drm/drm_plane.c18
-rw-r--r--drivers/gpu/drm/drm_vblank.c22
6 files changed, 70 insertions, 21 deletions
diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index 4f0e274f4111..aad468d170a7 100644
--- a/drivers/gpu/drm/drm_auth.c
+++ b/drivers/gpu/drm/drm_auth.c
@@ -310,7 +310,7 @@ out:
*/
bool drm_is_current_master(struct drm_file *fpriv)
{
- return fpriv->is_master && fpriv->master == fpriv->minor->dev->master;
+ return fpriv->is_master && drm_lease_owner(fpriv->master) == fpriv->minor->dev->master;
}
EXPORT_SYMBOL(drm_is_current_master);
diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c
index 43f644844b83..59e0ebe733f8 100644
--- a/drivers/gpu/drm/drm_encoder.c
+++ b/drivers/gpu/drm/drm_encoder.c
@@ -226,7 +226,7 @@ int drm_mode_getencoder(struct drm_device *dev, void *data,
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
crtc = drm_encoder_get_crtc(encoder);
- if (crtc)
+ if (crtc && drm_lease_held(file_priv, crtc->base.id))
enc_resp->crtc_id = crtc->base.id;
else
enc_resp->crtc_id = 0;
@@ -234,7 +234,8 @@ int drm_mode_getencoder(struct drm_device *dev, void *data,
enc_resp->encoder_type = encoder->encoder_type;
enc_resp->encoder_id = encoder->base.id;
- enc_resp->possible_crtcs = encoder->possible_crtcs;
+ enc_resp->possible_crtcs = drm_lease_filter_crtcs(file_priv,
+ encoder->possible_crtcs);
enc_resp->possible_clones = encoder->possible_clones;
return 0;
diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index 919e78d45ab0..cda8bfab6d3b 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -122,10 +122,12 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
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 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
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);
diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c
index 240a05d91a53..d1599f36b605 100644
--- a/drivers/gpu/drm/drm_mode_object.c
+++ b/drivers/gpu/drm/drm_mode_object.c
@@ -104,6 +104,25 @@ void drm_mode_object_unregister(struct drm_device *dev,
mutex_unlock(&dev->mode_config.idr_mutex);
}
+/**
+ * drm_lease_required - check types which must be leased to be used
+ * @type: type of object
+ *
+ * Returns whether the provided type of drm_mode_object must
+ * be owned or leased to be used by a process.
+ */
+static bool drm_lease_required(uint32_t type)
+{
+ switch(type) {
+ case DRM_MODE_OBJECT_CRTC:
+ case DRM_MODE_OBJECT_CONNECTOR:
+ case DRM_MODE_OBJECT_PLANE:
+ return true;
+ default:
+ return false;
+ }
+}
+
struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
struct drm_file *file_priv,
uint32_t id, uint32_t type)
@@ -117,6 +136,9 @@ struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
if (obj && obj->id != id)
obj = NULL;
+ if (obj && drm_lease_required(obj->type) && !_drm_lease_held(file_priv, obj->id))
+ obj = NULL;
+
if (obj && obj->free_cb) {
if (!kref_get_unless_zero(&obj->refcount))
obj = NULL;
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 8d9824804b0c..19404e34cd59 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -479,10 +479,12 @@ int drm_mode_getplane_res(struct drm_device *dev, void *data,
!file_priv->universal_planes)
continue;
- if (count < plane_resp->count_planes &&
- put_user(plane->base.id, plane_ptr + count))
- return -EFAULT;
- count++;
+ if (drm_lease_held(file_priv, plane->base.id)) {
+ if (count < plane_resp->count_planes &&
+ put_user(plane->base.id, plane_ptr + count))
+ return -EFAULT;
+ count++;
+ }
}
plane_resp->count_planes = count;
@@ -504,9 +506,9 @@ int drm_mode_getplane(struct drm_device *dev, void *data,
return -ENOENT;
drm_modeset_lock(&plane->mutex, NULL);
- if (plane->state && plane->state->crtc)
+ if (plane->state && plane->state->crtc && drm_lease_held(file_priv, plane->state->crtc->base.id))
plane_resp->crtc_id = plane->state->crtc->base.id;
- else if (!plane->state && plane->crtc)
+ else if (!plane->state && plane->crtc && drm_lease_held(file_priv, plane->crtc->base.id))
plane_resp->crtc_id = plane->crtc->base.id;
else
plane_resp->crtc_id = 0;
@@ -520,7 +522,9 @@ int drm_mode_getplane(struct drm_device *dev, void *data,
drm_modeset_unlock(&plane->mutex);
plane_resp->plane_id = plane->base.id;
- plane_resp->possible_crtcs = plane->possible_crtcs;
+ plane_resp->possible_crtcs = drm_lease_filter_crtcs(file_priv,
+ plane->possible_crtcs);
+
plane_resp->gamma_size = 0;
/*
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 13722c373a6a..57cc6e37c810 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -1447,10 +1447,12 @@ static void drm_wait_vblank_reply(struct drm_device *dev, unsigned int pipe,
int drm_wait_vblank_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
+ struct drm_crtc *crtc;
struct drm_vblank_crtc *vblank;
union drm_wait_vblank *vblwait = data;
int ret;
u64 req_seq, seq;
+ unsigned int pipe_index;
unsigned int flags, pipe, high_pipe;
if (!dev->irq_enabled)
@@ -1472,9 +1474,25 @@ int drm_wait_vblank_ioctl(struct drm_device *dev, void *data,
flags = vblwait->request.type & _DRM_VBLANK_FLAGS_MASK;
high_pipe = (vblwait->request.type & _DRM_VBLANK_HIGH_CRTC_MASK);
if (high_pipe)
- pipe = high_pipe >> _DRM_VBLANK_HIGH_CRTC_SHIFT;
+ pipe_index = high_pipe >> _DRM_VBLANK_HIGH_CRTC_SHIFT;
else
- pipe = flags & _DRM_VBLANK_SECONDARY ? 1 : 0;
+ pipe_index = flags & _DRM_VBLANK_SECONDARY ? 1 : 0;
+
+ /* Convert lease-relative crtc index into global crtc index */
+ if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ pipe = 0;
+ drm_for_each_crtc(crtc, dev) {
+ if (drm_lease_held(file_priv, crtc->base.id)) {
+ if (pipe_index == 0)
+ break;
+ pipe_index--;
+ }
+ pipe++;
+ }
+ } else {
+ pipe = pipe_index;
+ }
+
if (pipe >= dev->num_crtcs)
return -EINVAL;