File 4817687a-rework-virDomainSEVDefParseXML.patch of Package libvirt.11329

commit 4817687a7de39b0296894f0d8d3959754d60fd30
Author: Michal Privoznik <mprivozn@redhat.com>
Date:   Wed Jun 13 12:44:06 2018 +0200

    conf: Rework virDomainSEVDefParseXML()
    
    Firstly, this function changes node for relative XPaths but
    doesn't restore the original one in case VIR_ALLOC(def) fails.
    Secondly, @type is leaked. Thirdly, dh-cert and session
    attributes are strdup()-ed needlessly, virXPathString already
    does that so we can use the retval immediately.
    
    Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
    Reviewed-by: Ján Tomko <jtomko@redhat.com>

Index: libvirt-4.0.0/src/conf/domain_conf.c
===================================================================
--- libvirt-4.0.0.orig/src/conf/domain_conf.c
+++ libvirt-4.0.0/src/conf/domain_conf.c
@@ -15432,17 +15432,16 @@ static virDomainSEVDefPtr
 virDomainSEVDefParseXML(xmlNodePtr sevNode,
                         xmlXPathContextPtr ctxt)
 {
-    char *tmp = NULL;
     char *type = NULL;
     xmlNodePtr save = ctxt->node;
     virDomainSEVDefPtr def;
     unsigned long policy;
 
-    ctxt->node = sevNode;
-
     if (VIR_ALLOC(def) < 0)
         return NULL;
 
+    ctxt->node = sevNode;
+
     if (!(type = virXMLPropString(sevNode, "type"))) {
         virReportError(VIR_ERR_XML_ERROR, "%s",
                        _("missing launch security type"));
@@ -15482,29 +15481,18 @@ virDomainSEVDefParseXML(xmlNodePtr sevNo
     }
 
     def->policy = policy;
+    def->dh_cert = virXPathString("string(./dhCert)", ctxt);
+    def->session = virXPathString("string(./session)", ctxt);
 
-    if ((tmp = virXPathString("string(./dhCert)", ctxt))) {
-        if (VIR_STRDUP(def->dh_cert, tmp) < 0)
-            goto error;
-
-        VIR_FREE(tmp);
-    }
-
-    if ((tmp = virXPathString("string(./session)", ctxt))) {
-        if (VIR_STRDUP(def->session, tmp) < 0)
-            goto error;
-
-        VIR_FREE(tmp);
-    }
-
+ cleanup:
+    VIR_FREE(type);
     ctxt->node = save;
     return def;
 
  error:
-    VIR_FREE(tmp);
     virDomainSEVDefFree(def);
-    ctxt->node = save;
-    return NULL;
+    def = NULL;
+    goto cleanup;
 }
 
 static virDomainMemoryDefPtr