prop224: Update OOM counters when freeing a client descriptor cache object

When we free a client descriptor cache object, tell the OOM handler.

Signed-off-by: David Goulet <dgoulet@torproject.org>

src/or/hs_cache.c

@@ -335,6 +335,8 @@ remove_v3_desc_as_client(const hs_cache_client_descriptor_t *desc)
 {
   tor_assert(desc);
   digest256map_remove(hs_cache_v3_client, desc->key.pubkey);
+  /* Update cache size with this entry for the OOM handler. */
+  rend_cache_decrement_allocation(cache_get_client_entry_size(desc));
 }
 
 /* Store a given descriptor in our cache. */
@@ -608,7 +610,6 @@ cache_store_as_client(hs_cache_client_descriptor_t *client_desc)
     }
     /* Remove old entry. Make space for the new one! */
     remove_v3_desc_as_client(cache_entry);
-    rend_cache_decrement_allocation(cache_get_client_entry_size(cache_entry));
     cache_client_desc_free(cache_entry);
   }
 
@@ -649,7 +650,8 @@ cache_clean_v3_as_client(time_t now)
     bytes_removed += entry_size;
     /* Entry is not in the cache anymore, destroy it. */
     cache_client_desc_free(entry);
-    /* Update our cache entry allocation size for the OOM. */
+    /* Update our OOM. We didn't use the remove() function because we are in
+     * a loop so we have to explicitely decrement. */
     rend_cache_decrement_allocation(entry_size);
     /* Logging. */
     {