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drm: Fix fb leaks and WARN spew in get/set_prop ioctls

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Dave Airlie had at least the refcount leak fixed in a later patch (but
that patch does other things which need a bit more work). But we still
have the trouble that silly userspace could hit the WARN_ON in
drm_mode_object_find.

Fix this all up to make sure we don't leak objects, and don't spew
into demsg.

Fixes: d0f37cf629 ("drm/mode: move framebuffer reference into object.")
Testcase: igt/kms_addfb_basic/invalid-*-prop*
Cc: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Daniel Vetter 2016-04-22 22:10:28 +02:00 committed by Dave Airlie
parent 05981422ea
commit 1649c33ba3
1 changed files with 9 additions and 7 deletions
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16
drivers/gpu/drm/drm_crtc.c
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@ -389,9 +389,7 @@ struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
{
struct drm_mode_object *obj = NULL;
/* Framebuffers are reference counted and need their own lookup
* function.*/
WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB);
WARN_ON(type == DRM_MODE_OBJECT_BLOB);
obj = _object_find(dev, id, type);
return obj;
}
@ -5005,7 +5003,7 @@ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
}
if (!obj->properties) {
ret = -EINVAL;
goto out;
goto out_unref;
}
ret = get_properties(obj, file_priv->atomic,
@ -5013,6 +5011,8 @@ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
(uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
&arg->count_props);
out_unref:
drm_mode_object_unreference(obj);
out:
drm_modeset_unlock_all(dev);
return ret;
@ -5055,20 +5055,20 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
goto out;
}
if (!arg_obj->properties)
goto out;
goto out_unref;
for (i = 0; i < arg_obj->properties->count; i++)
if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
break;
if (i == arg_obj->properties->count)
goto out;
goto out_unref;
prop_obj = drm_mode_object_find(dev, arg->prop_id,
DRM_MODE_OBJECT_PROPERTY);
if (!prop_obj) {
ret = -ENOENT;
goto out;
goto out_unref;
}
property = obj_to_property(prop_obj);
@ -5091,6 +5091,8 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
drm_property_change_valid_put(property, ref);
out_unref:
drm_mode_object_unreference(arg_obj);
out:
drm_modeset_unlock_all(dev);
return ret;