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$NetBSD: patch-CVE-2013-1918_10,v 1.1 2013/05/03 16:48:37 drochner Exp $
--- xen/arch/x86/traps.c.orig 2013-04-23 16:44:20.000000000 +0000
+++ xen/arch/x86/traps.c
@@ -2317,8 +2317,15 @@ static int emulate_privileged_op(struct
rc = new_guest_cr3(gmfn_to_mfn(v->domain, compat_cr3_to_pfn(*reg)));
#endif
domain_unlock(v->domain);
- if ( rc == 0 ) /* not okay */
+ switch ( rc )
+ {
+ case 0:
+ break;
+ case -EAGAIN: /* retry after preemption */
+ goto skip;
+ default: /* not okay */
goto fail;
+ }
break;
case 4: /* Write CR4 */
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