From: Tim Deegan <Tim.Deegan@citrix.com>
Date: Mon, 14 Mar 2011 17:00:34 +0000 (+0000)
Subject: x86_64: fix error checking in arch_set_info_guest()
X-Git-Tag: 4.1.0-rc7~7
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=7a824508174c78954231bb36c10826e6b840478e;p=people%2Fvhanquez%2Fxen.git

x86_64: fix error checking in arch_set_info_guest()

Cannot specify user mode execution without specifying user-mode
pagetables.

Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
xen-unstable changeset:   23034:c79aae866ad8
xen-unstable date:        Mon Mar 14 16:59:49 2011 +0000
---

diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index a024e198e..579192567 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -826,6 +826,11 @@ int arch_set_info_guest(
 
             v->arch.guest_table_user = pagetable_from_pfn(cr3_pfn);
         }
+        else if ( !(flags & VGCF_in_kernel) )
+        {
+            destroy_gdt(v);
+            return -EINVAL;
+        }
     }
     else
     {