xen: Don't crash when we fail to init caps

by dereferencing a NULL pointer in the call to
virNodeSuspendGetTargetMask.

diff --git a/src/xen/xen_hypervisor.c b/src/xen/xen_hypervisor.c
index 5e7196712f566461761b746d0f05ee01dff9bcd1..b5b2328c22ccffb17f7710b3ed6064907d744215 100644 (file)
--- a/src/xen/xen_hypervisor.c
+++ b/src/xen/xen_hypervisor.c
@@ -2764,6 +2764,8 @@ xenHypervisorMakeCapabilities(virConnectPtr conn)
                                                  utsname.machine,
                                                  cpuinfo,
                                                  capabilities);
+    if (caps == NULL)
+        return NULL;
 
     if (virNodeSuspendGetTargetMask(&caps->host.powerMgmt) < 0)
         VIR_WARN("Failed to get host power management capabilities");