[Xen-ia64-devel] [PATCH] Fix security vulnerability

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

DomU can map any other domain's memory.

Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>

diff -r 45d16899a21d xen/arch/ia64/xen/dom0_ops.c
--- a/xen/arch/ia64/xen/dom0_ops.c      Sun Jan 13 10:50:18 2008 +0000
+++ b/xen/arch/ia64/xen/dom0_ops.c      Tue Jan 15 15:39:17 2008 +0900
@@ -522,10 +522,14 @@ do_dom0vp_op(unsigned long cmd,
         ret = dom0vp_zap_physmap(d, arg0, (unsigned int)arg1);
         break;
     case IA64_DOM0VP_add_physmap:
+        if ( !IS_PRIV(d) )
+            return -EPERM;
         ret = dom0vp_add_physmap(d, arg0, arg1, (unsigned int)arg2,
                                  (domid_t)arg3);
         break;
     case IA64_DOM0VP_add_physmap_with_gmfn:
+        if ( !IS_PRIV(d) )
+            return -EPERM;
         ret = dom0vp_add_physmap_with_gmfn(d, arg0, arg1, (unsigned int)arg2,
                                            (domid_t)arg3);
         break;

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