[PATCH] Only call EvtchnFlush on valid Cpus

[Owen Smith <owen.smith@xxxxxxxxx>]

The Evtchn processor array is created using KeQueryMaximumProcessorCountEx, 
which
can include processors that do not get initialized.
Skip cleanup and flushing uninitialized event channels

Signed-off-by: Owen Smith <owen.smith@xxxxxxxxx>
---
 src/xenbus/evtchn.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/xenbus/evtchn.c b/src/xenbus/evtchn.c
index 2e63edb..ec4ac28 100644
--- a/src/xenbus/evtchn.c
+++ b/src/xenbus/evtchn.c
@@ -1752,10 +1752,16 @@ EvtchnRelease(
 
     for (Cpu = 0; Cpu < Context->ProcessorCount; Cpu++) {
         PXENBUS_EVTCHN_PROCESSOR Processor;
+        unsigned int             vcpu_id;
+        NTSTATUS                 status;
 
         ASSERT(Context->Processor != NULL);
         Processor = &Context->Processor[Cpu];
 
+        status = SystemProcessorVcpuId(Cpu, &vcpu_id);
+        if (!NT_SUCCESS(status))
+            continue;
+
         EvtchnFlush(Context, Cpu);
 
         (VOID) KeRemoveQueueDpc(&Processor->Dpc);
-- 
2.39.0.windows.1