security: avoid memory leak

Leak introduced in commit d6623003.

* src/qemu/qemu_driver.c (qemuSecurityInit): Avoid leak on failure.
* src/security/security_stack.c (virSecurityStackClose): Avoid
leaking component drivers.

src/qemu/qemu_driver.c

@@ -204,8 +204,11 @@ qemuSecurityInit(struct qemud_driver *driver)
             goto error;
 
         if (!(driver->securityManager = virSecurityManagerNewStack(mgr,
-                                                                   dac)))
+                                                                   dac))) {
+
+            virSecurityManagerFree(dac);
             goto error;
+        }
     } else {
         driver->securityManager = mgr;
     }

src/security/security_stack.c

@@ -61,8 +61,13 @@ virSecurityStackOpen(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED)
 }
 
 static int
-virSecurityStackClose(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED)
+virSecurityStackClose(virSecurityManagerPtr mgr)
 {
+    virSecurityStackDataPtr priv = virSecurityManagerGetPrivateData(mgr);
+
+    virSecurityManagerFree(priv->primary);
+    virSecurityManagerFree(priv->secondary);
+
     return 0;
 }