[Xen-devel] [PATCH v2] Reset runstate_guest handles on soft reset

[Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>]

runstate_guest handles need to be reset to prevent update_runstate_area()
corrupting guest's memory after we resume the guest.

Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
Changes since v1:
- use set_xen_guest_handle() instead of raw memset() [Jan Beulich]
---
 xen/common/domain.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/common/domain.c b/xen/common/domain.c
index 2979c1b..603b718 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -1074,7 +1074,10 @@ int domain_soft_reset(struct domain *d)
     grant_table_warn_active_grants(d);
 
     for_each_vcpu ( d, v )
+    {
+        set_xen_guest_handle(runstate_guest(v), NULL);
         unmap_vcpu_info(v);
+    }
 
     rc = arch_domain_soft_reset(d);
     if ( !rc )
-- 
2.5.0


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