From 594d5a3366734839be7a8a66cde0ad19462eee8a Mon Sep 17 00:00:00 2001
From: Pierre Schweitzer <pierre@reactos.org>
Date: Sun, 28 Dec 2014 12:57:58 +0000
Subject: [PATCH] [NTOSKRNL] Acquire IopSecurityResource exclusive when
 required. Spotted by Thomas.

svn path=/trunk/; revision=65857
---
 reactos/ntoskrnl/io/iomgr/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reactos/ntoskrnl/io/iomgr/file.c b/reactos/ntoskrnl/io/iomgr/file.c
index 789f0dd9e22..060a0fb0c59 100644
--- a/reactos/ntoskrnl/io/iomgr/file.c
+++ b/reactos/ntoskrnl/io/iomgr/file.c
@@ -1405,7 +1405,7 @@ IopSetDeviceSecurityDescriptor(IN PDEVICE_OBJECT DeviceObject,
         }
 
         KeEnterCriticalRegion();
-        ExAcquireResourceSharedLite(&IopSecurityResource, TRUE);
+        ExAcquireResourceExclusiveLite(&IopSecurityResource, TRUE);
         /* Check if someone changed it in our back */
         if (DeviceObject->SecurityDescriptor == OldSecurityDescriptor)
         {