From: Oliver Kurth <okurth@vmware.com>
Date: Fri, 5 Oct 2018 20:55:27 +0000 (-0700)
Subject: Use bitwise AND operation while fetching current IOPL.
X-Git-Tag: stable-10.3.5~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b4b07f53c71a83beed8fdc11f2dfeeb43aa20fda;p=thirdparty%2Fopen-vm-tools.git

Use bitwise AND operation while fetching current IOPL.

Iopl_Get() was using logical AND operation which could result
in wrong IOPL value. We should be using bitwise AND instead.
---

diff --git a/open-vm-tools/lib/include/ioplGet.h b/open-vm-tools/lib/include/ioplGet.h
index bcecf9bf2..2ebe8aad9 100644
--- a/open-vm-tools/lib/include/ioplGet.h
+++ b/open-vm-tools/lib/include/ioplGet.h
@@ -1,5 +1,5 @@
 /*********************************************************
- * Copyright (C) 2012-2017 VMware, Inc. All rights reserved.
+ * Copyright (C) 2012-2018 VMware, Inc. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as published
@@ -33,7 +33,7 @@
 extern "C" {
 #endif
 
-#define Iopl_Get() ((GetCallerEFlags() >> EFLAGS_IOPL_SHIFT) && 0x3)
+#define Iopl_Get() ((GetCallerEFlags() >> EFLAGS_IOPL_SHIFT) & 0x3)
 
 #if defined(__cplusplus)
 }  // extern "C"