tor-browser

commit d95936a3127efd855bf5a109dd77063eccc1148d
parent 01c0e2b464a8bd75f9dbb39c11a700e97cc6e0f0
Author: Tim Huang <tihuang@mozilla.com>
Date:   Wed, 31 Dec 2025 13:32:34 +0000

Bug 2007139 - Check the existence of the owner global before accessing in nsICanvasRenderingContextInternal::RecordCanvasUsage() for the offscreen canvas case. r=gfx-reviewers,lsalzman

Differential Revision: https://phabricator.services.mozilla.com/D277686

Diffstat:
M
dom/canvas/nsICanvasRenderingContextInternal.cpp
 | 
10
++++++----

1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/dom/canvas/nsICanvasRenderingContextInternal.cpp b/dom/canvas/nsICanvasRenderingContextInternal.cpp
@@ -101,10 +101,12 @@ void nsICanvasRenderingContextInternal::RecordCanvasUsage(
     auto usage =
         mozilla::CanvasUsage::CreateUsage(true, contextType, aAPI, size, this);
     if (NS_IsMainThread()) {
-      if (nsPIDOMWindowInner* inner =
-              mOffscreenCanvas->GetOwnerGlobal()->GetAsInnerWindow()) {
-        if (mozilla::dom::Document* doc = inner->GetExtantDoc()) {
-          doc->RecordCanvasUsage(usage);
+      nsIGlobalObject* global = mOffscreenCanvas->GetOwnerGlobal();
+      if (global) {
+        if (nsPIDOMWindowInner* inner = global->GetAsInnerWindow()) {
+          if (mozilla::dom::Document* doc = inner->GetExtantDoc()) {
+            doc->RecordCanvasUsage(usage);
+          }
         }
       }
     } else {