From 156cf60be512c741427805c23ffb66476b6dec9d Mon Sep 17 00:00:00 2001
From: Thomas Faber <thomas.faber@reactos.org>
Date: Wed, 1 Mar 2017 13:10:52 +0000
Subject: [PATCH] [NTOS:IO] - Avoid event leak in NtQueryInformationFile. CID
 716584

svn path=/trunk/; revision=74013
---
 reactos/ntoskrnl/io/iomgr/iofunc.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/reactos/ntoskrnl/io/iomgr/iofunc.c b/reactos/ntoskrnl/io/iomgr/iofunc.c
index 9d99a82476b..eb32a4d715e 100644
--- a/reactos/ntoskrnl/io/iomgr/iofunc.c
+++ b/reactos/ntoskrnl/io/iomgr/iofunc.c
@@ -2240,8 +2240,17 @@ NtQueryInformationFile(IN HANDLE FileHandle,
             }
             _SEH2_END;
 
-            /* Unlock FO */
-            IopUnlockFileObject(FileObject);
+            /* Free the event if we had one */
+            if (LocalEvent)
+            {
+                ExFreePoolWithTag(Event, TAG_IO);
+            }
+
+            /* If FO was locked, unlock it */
+            if (FileObject->Flags & FO_SYNCHRONOUS_IO)
+            {
+                IopUnlockFileObject(FileObject);
+            }
 
             /* We're done with FastIO! */
             ObDereferenceObject(FileObject);
-- 
2.17.1