From 763941749eaa206d5c66e87e59c967814cbd6a27 Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Wed, 6 Jan 2016 16:07:42 +0100
Subject: [PATCH] conf: disallow empty cpuset for emulatorpin

It's disallowed in the API.
---
 src/conf/domain_conf.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 68287f3d7d..1ea74a6ad6 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -14275,8 +14275,18 @@ virDomainEmulatorPinDefParseXML(xmlNodePtr node)
         return NULL;
     }
 
-    ignore_value(virBitmapParse(tmp, 0, &def, VIR_DOMAIN_CPUMASK_LEN));
+    if (virBitmapParse(tmp, 0, &def, VIR_DOMAIN_CPUMASK_LEN) < 0)
+        goto cleanup;
 
+    if (virBitmapIsAllClear(def)) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                       _("Invalid value of 'cpuset': %s"), tmp);
+        virBitmapFree(def);
+        def = NULL;
+        goto cleanup;
+    }
+
+ cleanup:
     VIR_FREE(tmp);
     return def;
 }