Backport: Fix memory leak in rend_cache_store_v2_desc_as_client().

svn:r17666

ChangeLog

@@ -43,6 +43,9 @@ Changes in version 0.2.0.33 - 200?-??-??
     - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
       user if lower values are given in the configuration. Bugfix on
       0.1.1.17-rc. Patch by Sebastian.
+    - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
+      the cache because we already had a v0 descriptor with the same ID.
+      Bugfix on 0.2.0.18-alpha.
 
   o Minor features:
     - Report the case where all signatures in a detached set are rejected

src/or/rendcommon.c

@@ -1139,6 +1139,7 @@ rend_cache_store_v2_desc_as_client(const char *desc,
   if (strmap_get_lc(rend_cache, key)) {
     log_info(LD_REND, "We already have a v0 descriptor for service ID %s.",
              safe_str(service_id));
+    rend_service_descriptor_free(parsed);
     return -1;
   }
   /* Do we already have a newer descriptor? */