From ca649bd6080ddd7ea6167a55db87ec2f4aa5ae79 Mon Sep 17 00:00:00 2001
From: Linh Vo <vovanlinh29546@gmail.com>
Date: Sun, 15 Feb 2026 11:05:01 +0700
Subject: [PATCH 1/2] fix: fix crash due data race on
 globalMarkdownWorkletRuntime

---
 cpp/MarkdownGlobal.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cpp/MarkdownGlobal.cpp b/cpp/MarkdownGlobal.cpp
index 67f93eb4..a275b297 100644
--- a/cpp/MarkdownGlobal.cpp
+++ b/cpp/MarkdownGlobal.cpp
@@ -8,12 +8,15 @@ namespace expensify {
 namespace livemarkdown {
 
 std::shared_ptr<WorkletRuntime> globalMarkdownWorkletRuntime;
+std::mutex globalMarkdownRuntimeMutex;
 
 void setMarkdownRuntime(const std::shared_ptr<WorkletRuntime> &markdownWorkletRuntime) {
+  std::lock_guard<std::mutex> lock(globalMarkdownRuntimeMutex);
   globalMarkdownWorkletRuntime = markdownWorkletRuntime;
 }
 
 std::shared_ptr<WorkletRuntime> getMarkdownRuntime() {
+  std::lock_guard<std::mutex> lock(globalMarkdownRuntimeMutex);
   return globalMarkdownWorkletRuntime;
 }
 

From 19ad58c01e0e22b36c4d889a44a47fc4431303c8 Mon Sep 17 00:00:00 2001
From: Linh Vo <vovanlinh29546@gmail.com>
Date: Sun, 15 Feb 2026 16:17:01 +0700
Subject: [PATCH 2/2] chore: add assert for debug

---
 cpp/MarkdownGlobal.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cpp/MarkdownGlobal.cpp b/cpp/MarkdownGlobal.cpp
index a275b297..a68e305c 100644
--- a/cpp/MarkdownGlobal.cpp
+++ b/cpp/MarkdownGlobal.cpp
@@ -1,5 +1,6 @@
 #include "MarkdownGlobal.h"
 
+#include <react/debug/react_native_assert.h>
 #include <unordered_map>
 
 using namespace facebook;
@@ -17,6 +18,7 @@ void setMarkdownRuntime(const std::shared_ptr<WorkletRuntime> &markdownWorkletRu
 
 std::shared_ptr<WorkletRuntime> getMarkdownRuntime() {
   std::lock_guard<std::mutex> lock(globalMarkdownRuntimeMutex);
+  react_native_assert(globalMarkdownWorkletRuntime != nullptr && "Markdown worklet runtime is not initialized yet");
   return globalMarkdownWorkletRuntime;
 }