From 67d52eb4f27b2056e181a77cbd8afa34c62d0d16 Mon Sep 17 00:00:00 2001
From: shrekshao <shrekshao@google.com>
Date: Tue, 29 Nov 2022 22:00:13 +0000
Subject: [PATCH] Fix stack-use-after-scope for usedInterstageVariables pointer

Bug: chromium:1393728
Change-Id: I078f898b9a6a237c81c15bb86736eb790cf6a261
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/112260
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Shrek Shao <shrekshao@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
---
 src/dawn/native/d3d12/RenderPipelineD3D12.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/dawn/native/d3d12/RenderPipelineD3D12.cpp b/src/dawn/native/d3d12/RenderPipelineD3D12.cpp
index 6c8a6fbeac..0a8532583f 100644
--- a/src/dawn/native/d3d12/RenderPipelineD3D12.cpp
+++ b/src/dawn/native/d3d12/RenderPipelineD3D12.cpp
@@ -358,11 +358,12 @@ MaybeError RenderPipeline::Initialize() {
     PerStage<CompiledShader> compiledShader;
 
     std::bitset<kMaxInterStageShaderVariables>* usedInterstageVariables = nullptr;
+    dawn::native::EntryPointMetadata fragmentEntryPoint;
     if (GetStageMask() & wgpu::ShaderStage::Fragment) {
         // Now that only fragment shader can have interstage inputs.
         const ProgrammableStage& programmableStage = GetStage(SingleShaderStage::Fragment);
-        auto entryPoint = programmableStage.module->GetEntryPoint(programmableStage.entryPoint);
-        usedInterstageVariables = &entryPoint.usedInterStageVariables;
+        fragmentEntryPoint = programmableStage.module->GetEntryPoint(programmableStage.entryPoint);
+        usedInterstageVariables = &fragmentEntryPoint.usedInterStageVariables;
     }
 
     for (auto stage : IterateStages(GetStageMask())) {