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 475bea216e07fca71e152fc00279750fecfb81db..b82ad9da47ea2a25b29f19a6dbd295f09a8919e0 100644 (file)
--- 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) \