From 4ed5978bdd99114db7773cb3d78f2998bd17f694 Mon Sep 17 00:00:00 2001
From: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>
Date: Wed, 3 Oct 2012 18:08:52 +0100
Subject: [PATCH] xen/xen_initial_domain: check that xen_start_info is
initialized
Since commit commit 4c071ee5268f7234c3d084b6093bebccc28cdcba ("arm:
initial Xen support") PV on HVM guests can be xen_initial_domain.
However PV on HVM guests might have an unitialized xen_start_info, so
check before accessing its fields.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <Ian.Campbell@citrix.com>
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
include/xen/xen.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/xen/xen.h b/include/xen/xen.h
index 2c0d3a56c749c6..a74d4362c4f84a 100644
--- a/include/xen/xen.h
+++ b/include/xen/xen.h
@@ -24,7 +24,7 @@ extern enum xen_domain_type xen_domain_type;
#include <asm/xen/hypervisor.h>
#define xen_initial_domain() (xen_domain() && \
- xen_start_info->flags & SIF_INITDOMAIN)
+ xen_start_info && xen_start_info->flags & SIF_INITDOMAIN)
#else /* !CONFIG_XEN_DOM0 */
#define xen_initial_domain() (0)
#endif /* CONFIG_XEN_DOM0 */
--
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