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$NetBSD: patch-CVE-2012-3432,v 1.1 2012/07/27 18:50:34 drochner Exp $
see http://lists.xen.org/archives/html/xen-devel/2012-07/msg01649.html
--- xen/arch/x86/hvm/io.c.orig 2012-07-27 18:34:15.000000000 +0000
+++ xen/arch/x86/hvm/io.c
@@ -176,6 +176,8 @@ int handle_mmio(void)
rc = hvm_emulate_one(&ctxt);
+ if ( rc != X86EMUL_RETRY )
+ curr->arch.hvm_vcpu.io_state = HVMIO_none;
if ( curr->arch.hvm_vcpu.io_state == HVMIO_awaiting_completion )
curr->arch.hvm_vcpu.io_state = HVMIO_handle_mmio_awaiting_completion;
else
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