From: Keir Fraser <keir@xen.org>
Date: Wed, 31 Aug 2011 14:14:49 +0000 (+0100)
Subject: x86-64: Fix off-by-one error in __addr_ok() macro
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~9936
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=773f372b6b4e6a0661f721696a987f02c8220b80;p=xen.git

x86-64: Fix off-by-one error in __addr_ok() macro

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Keir Fraser <keir@xen.org>
---

diff --git a/xen/include/asm-x86/x86_64/uaccess.h b/xen/include/asm-x86/x86_64/uaccess.h
index 475bea216e..b82ad9da47 100644
--- a/xen/include/asm-x86/x86_64/uaccess.h
+++ b/xen/include/asm-x86/x86_64/uaccess.h
@@ -34,7 +34,7 @@ extern void *xlat_malloc(unsigned long *xlat_page_current, size_t size);
  * non-canonical address (and thus fault) before ever reaching VIRT_START.
  */
 #define __addr_ok(addr) \
-    (((unsigned long)(addr) < (1UL<<48)) || \
+    (((unsigned long)(addr) < (1UL<<47)) || \
      ((unsigned long)(addr) >= HYPERVISOR_VIRT_END))
 
 #define access_ok(addr, size) \