From 25b05840d4fad5d12f308077925e3cf92bcebfb7 Mon Sep 17 00:00:00 2001
From: Jinoh Kang <jinoh.kang.kr@gmail.com>
Date: Mon, 19 Sep 2022 00:13:24 +0900
Subject: [PATCH] win32u: Fix data race in NtUserGetProcessDpiAwarenessContext.

---
 dlls/win32u/sysparams.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/dlls/win32u/sysparams.c b/dlls/win32u/sysparams.c
index 498ed386386..9f0812b843e 100644
--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -5330,14 +5330,17 @@ BOOL WINAPI NtUserSetProcessDpiAwarenessContext( ULONG awareness, ULONG unknown
  */
 ULONG WINAPI NtUserGetProcessDpiAwarenessContext( HANDLE process )
 {
+    DPI_AWARENESS val;
+
     if (process && process != GetCurrentProcess())
     {
         WARN( "not supported on other process %p\n", process );
         return NTUSER_DPI_UNAWARE;
     }
 
-    if (!dpi_awareness) return NTUSER_DPI_UNAWARE;
-    return dpi_awareness;
+    val = ReadNoFence( &dpi_awareness );
+    if (!val) return NTUSER_DPI_UNAWARE;
+    return val;
 }
 
 BOOL message_beep( UINT i )