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osr: Fix potential null ptr dereference during DnD

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This commit is contained in:
Julien Bouix
2024-01-05 20:20:37 +00:00
committed by Marshall Greenblatt
parent fe119b9d65
commit 79f4ad960d
1 changed files with 14 additions and 6 deletions
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20
libcef/browser/osr/browser_platform_delegate_osr.cc
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@@ -333,12 +333,20 @@ void CefBrowserPlatformDelegateOsr::DragTargetDragEnter(
const gfx::Point client_pt(event.x, event.y);
gfx::PointF transformed_pt;
current_rwh_for_drag_ =
web_contents->GetInputEventRouter()
->GetRenderWidgetHostAtPoint(
web_contents->GetRenderViewHost()->GetWidget()->GetView(),
gfx::PointF(client_pt), &transformed_pt)
->GetWeakPtr();
// Some random crashes occured when GetWeakPtr is called on a null pointer
// that is the return of GetRenderWidgetHostAtPoint As the root cause is not
// yet understood (no reproducible scenario yet), the current fix is only a
// protection against null pointer dereferencing.
content::RenderWidgetHostImpl* ptr_current_rwh_for_drag =
web_contents->GetInputEventRouter()->GetRenderWidgetHostAtPoint(
web_contents->GetRenderViewHost()->GetWidget()->GetView(),
gfx::PointF(client_pt), &transformed_pt);
if (!ptr_current_rwh_for_drag) {
return;
}
current_rwh_for_drag_ = ptr_current_rwh_for_drag->GetWeakPtr();
current_rvh_for_drag_ = web_contents->GetRenderViewHost();
drag_data_ = drag_data;