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Fix potential nullptr dereference in CanvasLayer 

* Changed another instance of ERR_FAIL_COND in the same file to
  ERR_FAIL_NULL_MSG instead.
* Checked for potential access of the viewport pointer elsewhere in same
  file.

Fixes #54098
This commit is contained in:
Sean Kim 2021-10-21 19:36:02 -07:00
parent bbcf8ac672
commit 497b00a937
1 changed files with 6 additions and 2 deletions
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8
scene/main/canvas_layer.cpp
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@ -128,7 +128,7 @@ void CanvasLayer::_notification(int p_what) {
} else {
vp = Node::get_viewport();
}
ERR_FAIL_COND(!vp);
ERR_FAIL_NULL_MSG(vp, "Viewport is not initialized.");
vp->_canvas_layer_add(this);
viewport = vp->get_viewport_rid();
@ -140,6 +140,8 @@ void CanvasLayer::_notification(int p_what) {
} break;
case NOTIFICATION_EXIT_TREE: {
ERR_FAIL_NULL_MSG(vp, "Viewport is not initialized.");
vp->_canvas_layer_remove(this);
RenderingServer::get_singleton()->viewport_remove_canvas(viewport, canvas);
viewport = RID();
@ -160,6 +162,8 @@ Size2 CanvasLayer::get_viewport_size() const {
return Size2(1, 1);
}
ERR_FAIL_NULL_V_MSG(vp, Size2(1, 1), "Viewport is not initialized.");
Rect2 r = vp->get_visible_rect();
return r.size;
}
@ -169,7 +173,7 @@ RID CanvasLayer::get_viewport() const {
}
void CanvasLayer::set_custom_viewport(Node *p_viewport) {
ERR_FAIL_NULL(p_viewport);
ERR_FAIL_NULL_MSG(p_viewport, "Cannot set viewport to nullptr.");
if (is_inside_tree()) {
vp->_canvas_layer_remove(this);
RenderingServer::get_singleton()->viewport_remove_canvas(viewport, canvas);