Bug 1164513 - Add nullptr check r=milan

gfx/layers/ipc/SharedBufferManagerParent.cpp

@@ -364,7 +364,11 @@ android::sp<android::GraphicBuffer>
 SharedBufferManagerParent::GetGraphicBuffer(GrallocBufferRef aRef)
 {
   MonitorAutoLock lock(*sManagerMonitor.get());
-  return GetInstance(aRef.mOwner)->GetGraphicBuffer(aRef.mKey);
+  SharedBufferManagerParent* parent = GetInstance(aRef.mOwner);
+  if (!parent) {
+    return nullptr;
+  }
+  return parent->GetGraphicBuffer(aRef.mKey);
 }
 #endif
 

gfx/layers/opengl/GrallocTextureHost.cpp

@@ -231,6 +231,9 @@ GrallocTextureHostOGL::GetRenderState()
 TemporaryRef<gfx::DataSourceSurface>
 GrallocTextureHostOGL::GetAsSurface() {
   android::GraphicBuffer* graphicBuffer = GetGraphicBufferFromDesc(mGrallocHandle).get();
+  if (!graphicBuffer) {
+    return nullptr;
+  }
   uint8_t* grallocData;
   graphicBuffer->lock(GRALLOC_USAGE_SW_READ_OFTEN, reinterpret_cast<void**>(&grallocData));
   RefPtr<gfx::DataSourceSurface> grallocTempSurf =