From 5a440b2d9014078e600fa2b97f32d5aa9c94d5d8 Mon Sep 17 00:00:00 2001
From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Wed, 11 Mar 2020 07:36:07 +0900
Subject: [PATCH] [SHLWAPI] Follow-up of #2430

Add a NULL check in SHLockSharedEx function. CORE-13950
---
 dll/win32/shlwapi/ordinal.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dll/win32/shlwapi/ordinal.c b/dll/win32/shlwapi/ordinal.c
index 8773234e2df..216e7e56a62 100644
--- a/dll/win32/shlwapi/ordinal.c
+++ b/dll/win32/shlwapi/ordinal.c
@@ -259,6 +259,8 @@ PVOID WINAPI SHLockShared(HANDLE hShared, DWORD dwProcId)
 
   /* Get handle to shared memory for current process */
   hDup = SHMapHandle(hShared, dwProcId, GetCurrentProcessId(), FILE_MAP_ALL_ACCESS, 0);
+  if (hDup == NULL)
+    return NULL;
 
   /* Get View */
   pMapped = MapViewOfFile(hDup, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);