[libvirt] [PATCH 08/11] conf: Use domainPostParseData(Alloc|Free) in virDomainDefValidate

[Marc Hartmayer]

For the usage of the parameter @parseOpqaue within
virDomainDefValidate it must be ensured that the parameter
@parseOpaque is not NULL. But since there are code paths where
virDomainDefValidate is called with @parseOpaque ==
NULL (e.g. the function call of virDomainDefParseNode with @parseOpqaue ==
NULL leads to this).

To prevent this, domainPostParseDataAlloc is called within
virDomainDefValidate to ensure that @parseOpaque is always set. The
usage of domainPostParseDataAlloc within virDomainDefValidate is
allowed since virDomainDefValidate is only called after
virDomainDefPostParse.

Signed-off-by: Marc Hartmayer <mhartmay at linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy at linux.ibm.com>
---
 src/conf/domain_conf.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index ae7f3ed95faf..4f1c569b5733 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -6288,6 +6288,9 @@ virDomainDefValidate(virDomainDefPtr def,
                      virDomainXMLOptionPtr xmlopt,
                      void *parseOpaque)
 {
+    int ret = -1;
+    bool localParseOpaque = false;
+
     struct virDomainDefPostParseDeviceIteratorData data = {
         .caps = caps,
         .xmlopt = xmlopt,
@@ -6299,6 +6302,17 @@ virDomainDefValidate(virDomainDefPtr def,
     if (parseFlags & VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)
         return 0;
 
+    if (!data.parseOpaque &&
+        xmlopt->config.domainPostParseDataAlloc) {
+        ret = xmlopt->config.domainPostParseDataAlloc(def, caps, parseFlags,
+                                                      xmlopt->config.priv,
+                                                      &data.parseOpaque);
+
+        if (virDomainDefPostParseCheckFailure(def, parseFlags, ret) < 0)
+            goto cleanup;
+        localParseOpaque = true;
+    }
+
     /* call the domain config callback */
     if (xmlopt->config.domainValidateCallback &&
         xmlopt->config.domainValidateCallback(def, caps, xmlopt->config.priv, data.parseOpaque) < 0)
@@ -6313,6 +6327,13 @@ virDomainDefValidate(virDomainDefPtr def,
     if (virDomainDefValidateInternal(def) < 0)
         return -1;
 
+ cleanup:
+    if (localParseOpaque && xmlopt->config.domainPostParseDataFree)
+        xmlopt->config.domainPostParseDataFree(data.parseOpaque);
+
+    if (ret == 1)
+        return -1;
+
     return 0;
 }
 
-- 
2.17.0