26 files changed, 168 insertions, 76 deletions
diff --git a/src/common/aes.c b/src/common/aes.c
index e07665635b..451c31f02a 100644
--- a/src/common/aes.c
+++ b/src/common/aes.c
@@ -263,7 +263,8 @@ aes_set_key(aes_cnt_cipher_t *cipher, const char *key, int key_bits)
 void
 aes_free_cipher(aes_cnt_cipher_t *cipher)
 {
-  tor_assert(cipher);
+  if (!cipher)
+    return;
 #ifdef USE_OPENSSL_EVP
   EVP_CIPHER_CTX_cleanup(&cipher->key);
 #endif
diff --git a/src/common/compat.c b/src/common/compat.c
index dbd3197a88..87dedc5b57 100644
--- a/src/common/compat.c
+++ b/src/common/compat.c
@@ -2044,6 +2044,8 @@ tor_mutex_new(void)
 void
 tor_mutex_free(tor_mutex_t *m)
 {
+  if (!m)
+    return;
   tor_mutex_uninit(m);
   tor_free(m);
 }
@@ -2071,7 +2073,8 @@ tor_cond_new(void)
 void
 tor_cond_free(tor_cond_t *cond)
 {
-  tor_assert(cond);
+  if (!cond)
+    return;
   if (pthread_cond_destroy(&cond->cond)) {
     log_warn(LD_GENERAL,"Error freeing condition: %s", strerror(errno));
     return;
@@ -2128,7 +2131,8 @@ tor_cond_new(void)
 void
 tor_cond_free(tor_cond_t *cond)
 {
-  tor_assert(cond);
+  if (!cond)
+    return;
   DeleteCriticalSection(&cond->mutex);
   /* XXXX notify? */
   smartlist_free(cond->events);
diff --git a/src/common/container.c b/src/common/container.c
index f3540f74d8..7690b4c0ba 100644
--- a/src/common/container.c
+++ b/src/common/container.c
@@ -44,7 +44,8 @@ smartlist_create(void)
 void
 smartlist_free(smartlist_t *sl)
 {
-  tor_assert(sl != NULL);
+  if (!sl)
+    return;
   tor_free(sl->list);
   tor_free(sl);
 }
@@ -1187,6 +1188,9 @@ void
 strmap_free(strmap_t *map, void (*free_val)(void*))
 {
   strmap_entry_t **ent, **next, *this;
+  if (!map)
+    return;
+
   for (ent = HT_START(strmap_impl, &map->head); ent != NULL; ent = next) {
     this = *ent;
     next = HT_NEXT_RMV(strmap_impl, &map->head, ent);
@@ -1208,6 +1212,8 @@ void
 digestmap_free(digestmap_t *map, void (*free_val)(void*))
 {
   digestmap_entry_t **ent, **next, *this;
+  if (!map)
+    return;
   for (ent = HT_START(digestmap_impl, &map->head); ent != NULL; ent = next) {
     this = *ent;
     next = HT_NEXT_RMV(digestmap_impl, &map->head, ent);
@@ -1323,6 +1329,8 @@ digestset_new(int max_elements)
 void
 digestset_free(digestset_t *set)
 {
+  if (!set)
+    return;
   bitarray_free(set->ba);
   tor_free(set);
 }
diff --git a/src/common/crypto.c b/src/common/crypto.c
index 4c880f6b6f..4d17a8f216 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -400,7 +400,8 @@ crypto_new_pk_env(void)
 void
 crypto_free_pk_env(crypto_pk_env_t *env)
 {
-  tor_assert(env);
+  if (!env)
+    return;
 
   if (--env->refs > 0)
     return;
@@ -463,7 +464,8 @@ crypto_new_cipher_env(void)
 void
 crypto_free_cipher_env(crypto_cipher_env_t *env)
 {
-  tor_assert(env);
+  if (!env)
+    return;
 
   tor_assert(env->cipher);
   aes_free_cipher(env->cipher);
@@ -1528,6 +1530,8 @@ crypto_new_digest256_env(digest_algorithm_t algorithm)
 void
 crypto_free_digest_env(crypto_digest_env_t *digest)
 {
+  if (!digest)
+    return;
   memset(digest, 0, sizeof(crypto_digest_env_t));
   tor_free(digest);
 }
@@ -1899,7 +1903,8 @@ crypto_expand_key_material(const char *key_in, size_t key_in_len,
 void
 crypto_dh_free(crypto_dh_env_t *dh)
 {
-  tor_assert(dh);
+  if (!dh)
+    return;
   tor_assert(dh->dh);
   DH_free(dh->dh);
   tor_free(dh);
diff --git a/src/common/log.c b/src/common/log.c
index 9912080af6..5b5b9e086d 100644
--- a/src/common/log.c
+++ b/src/common/log.c
@@ -426,6 +426,8 @@ _log_err(log_domain_mask_t domain, const char *format, ...)
 static void
 log_free(logfile_t *victim)
 {
+  if (!victim)
+    return;
   tor_free(victim->severities);
   tor_free(victim->filename);
   tor_free(victim);
diff --git a/src/common/memarea.c b/src/common/memarea.c
index e7f6720646..661bd85da8 100644
--- a/src/common/memarea.c
+++ b/src/common/memarea.c
@@ -121,7 +121,7 @@ alloc_chunk(size_t sz, int freelist_ok)
 /** Release <b>chunk</b> from a memarea, either by adding it to the freelist
  * or by freeing it if the freelist is already too big. */
 static void
-chunk_free(memarea_chunk_t *chunk)
+chunk_free_unchecked(memarea_chunk_t *chunk)
 {
   CHECK_SENTINEL(chunk);
   if (freelist_len < MAX_FREELIST_LEN) {
@@ -151,7 +151,7 @@ memarea_drop_all(memarea_t *area)
   memarea_chunk_t *chunk, *next;
   for (chunk = area->first; chunk; chunk = next) {
     next = chunk->next_chunk;
-    chunk_free(chunk);
+    chunk_free_unchecked(chunk);
   }
   area->first = NULL; /*fail fast on */
   tor_free(area);
@@ -167,7 +167,7 @@ memarea_clear(memarea_t *area)
   if (area->first->next_chunk) {
     for (chunk = area->first->next_chunk; chunk; chunk = next) {
       next = chunk->next_chunk;
-      chunk_free(chunk);
+      chunk_free_unchecked(chunk);
     }
     area->first->next_chunk = NULL;
   }
diff --git a/src/common/torgzip.c b/src/common/torgzip.c
index 762f2e71bf..13e0c7fb7c 100644
--- a/src/common/torgzip.c
+++ b/src/common/torgzip.c
@@ -423,7 +423,8 @@ tor_zlib_process(tor_zlib_state_t *state,
 void
 tor_zlib_free(tor_zlib_state_t *state)
 {
-  tor_assert(state);
+  if (!state)
+    return;
 
   if (state->compress)
     deflateEnd(&state->stream);
diff --git a/src/common/tortls.c b/src/common/tortls.c
index 71d0bd6be2..0fde617717 100644
--- a/src/common/tortls.c
+++ b/src/common/tortls.c
@@ -986,7 +986,9 @@ void
 tor_tls_free(tor_tls_t *tls)
 {
   tor_tls_t *removed;
-  tor_assert(tls && tls->ssl);
+  if (!tls)
+    return;
+  tor_assert(tls->ssl);
   removed = HT_REMOVE(tlsmap, &tlsmap_root, tls);
   if (!removed) {
     log_warn(LD_BUG, "Freeing a TLS that was not in the ssl->tls map.");
diff --git a/src/or/buffers.c b/src/or/buffers.c
index 1a1b2077cc..7c40e47cca 100644
--- a/src/or/buffers.c
+++ b/src/or/buffers.c
@@ -147,10 +147,13 @@ get_freelist(size_t alloc)
 
 /** Deallocate a chunk or put it on a freelist */
 static void
-chunk_free(chunk_t *chunk)
+chunk_free_unchecked(chunk_t *chunk)
 {
-  size_t alloc = CHUNK_ALLOC_SIZE(chunk->memlen);
-  chunk_freelist_t *freelist = get_freelist(alloc);
+  size_t alloc;
+  chunk_freelist_t *freelist;
+
+  alloc = CHUNK_ALLOC_SIZE(chunk->memlen);
+  freelist = get_freelist(alloc);
   if (freelist && freelist->cur_length < freelist->max_length) {
     chunk->next = freelist->head;
     freelist->head = chunk;
@@ -195,7 +198,7 @@ chunk_new_with_alloc_size(size_t alloc)
 }
 #else
 static void
-chunk_free(chunk_t *chunk)
+chunk_free_unchecked(chunk_t *chunk)
 {
   tor_free(chunk);
 }
@@ -403,7 +406,7 @@ buf_pullup(buf_t *buf, size_t bytes, int nulterminate)
       dest->next = src->next;
       if (buf->tail == src)
         buf->tail = dest;
-      chunk_free(src);
+      chunk_free_unchecked(src);
     } else {
       memcpy(CHUNK_WRITE_PTR(dest), src->data, n);
       dest->datalen += n;
@@ -449,7 +452,7 @@ buf_remove_from_front(buf_t *buf, size_t n)
       buf->head = victim->next;
       if (buf->tail == victim)
         buf->tail = NULL;
-      chunk_free(victim);
+      chunk_free_unchecked(victim);
     }
   }
   check();
@@ -483,7 +486,7 @@ buf_clear(buf_t *buf)
   buf->datalen = 0;
   for (chunk = buf->head; chunk; chunk = next) {
     next = chunk->next;
-    chunk_free(chunk);
+    chunk_free_unchecked(chunk);
   }
   buf->head = buf->tail = NULL;
 }
@@ -522,6 +525,8 @@ buf_slack(const buf_t *buf)
 void
 buf_free(buf_t *buf)
 {
+  if (!buf)
+    return;
   buf_clear(buf);
   buf->magic = 0xdeadbeef;
   tor_free(buf);
diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c
index 91fa9d8db5..29f9d7732d 100644
--- a/src/or/circuitbuild.c
+++ b/src/or/circuitbuild.c
@@ -2744,7 +2744,8 @@ extend_info_from_router(routerinfo_t *r)
 void
 extend_info_free(extend_info_t *info)
 {
-  tor_assert(info);
+  if (!info)
+    return;
   if (info->onion_key)
     crypto_free_pk_env(info->onion_key);
   tor_free(info);
@@ -3053,7 +3054,8 @@ pick_entry_guards(void)
 static void
 entry_guard_free(entry_guard_t *e)
 {
-  tor_assert(e);
+  if (!e)
+    return;
   tor_free(e->chosen_by_version);
   tor_free(e);
 }
diff --git a/src/or/circuitlist.c b/src/or/circuitlist.c
index 02bf925ba5..e0cb644864 100644
--- a/src/or/circuitlist.c
+++ b/src/or/circuitlist.c
@@ -442,7 +442,9 @@ circuit_free(circuit_t *circ)
 {
   void *mem;
   size_t memlen;
-  tor_assert(circ);
+  if (!circ)
+    return;
+
   if (CIRCUIT_IS_ORIGIN(circ)) {
     origin_circuit_t *ocirc = TO_ORIGIN_CIRCUIT(circ);
     mem = ocirc;
@@ -558,6 +560,9 @@ circuit_free_all(void)
 static void
 circuit_free_cpath_node(crypt_path_t *victim)
 {
+  if (!victim)
+    return;
+
   if (victim->f_crypto)
     crypto_free_cipher_env(victim->f_crypto);
   if (victim->b_crypto)
diff --git a/src/or/config.c b/src/or/config.c
index 66f9d0488b..6ab87ab420 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -859,6 +859,9 @@ get_version(void)
 static void
 or_options_free(or_options_t *options)
 {
+  if (!options)
+    return;
+
   if (options->_ExcludeExitNodesUnion)
     routerset_free(options->_ExcludeExitNodesUnion);
   config_free(&options_format, options);
@@ -2609,7 +2612,10 @@ config_free(config_format_t *fmt, void *options)
 {
   int i;
 
-  tor_assert(options);
+  if (!options)
+    return;
+
+  tor_assert(fmt);
 
   for (i=0; fmt->vars[i].name; ++i)
     option_clear(fmt, options, &(fmt->vars[i]));
diff --git a/src/or/connection.c b/src/or/connection.c
index 0600d9711f..ddcf08c160 100644
--- a/src/or/connection.c
+++ b/src/or/connection.c
@@ -311,6 +311,9 @@ _connection_free(connection_t *conn)
 {
   void *mem;
   size_t memlen;
+  if (!conn)
+    return;
+
   switch (conn->type) {
     case CONN_TYPE_OR:
       tor_assert(conn->magic == OR_CONNECTION_MAGIC);
@@ -432,7 +435,8 @@ _connection_free(connection_t *conn)
 void
 connection_free(connection_t *conn)
 {
-  tor_assert(conn);
+  if (!conn)
+    return;
   tor_assert(!connection_is_on_closeable_list(conn));
   tor_assert(!connection_in_array(conn));
   if (conn->linked_conn) {
diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c
index 75a57fedd5..b0ba96164e 100644
--- a/src/or/connection_edge.c
+++ b/src/or/connection_edge.c
@@ -688,7 +688,11 @@ addressmap_init(void)
 static void
 addressmap_ent_free(void *_ent)
 {
-  addressmap_entry_t *ent = _ent;
+  addressmap_entry_t *ent;
+  if (!_ent)
+    return;
+
+  ent = _ent;
   tor_free(ent->new_address);
   tor_free(ent);
 }
@@ -697,7 +701,11 @@ addressmap_ent_free(void *_ent)
 static void
 addressmap_virtaddress_ent_free(void *_ent)
 {
-  virtaddress_entry_t *ent = _ent;
+  virtaddress_entry_t *ent;
+  if (!_ent)
+    return;
+
+  ent = _ent;
   tor_free(ent->ipv4_address);
   tor_free(ent->hostname_address);
   tor_free(ent);
diff --git a/src/or/connection_or.c b/src/or/connection_or.c
index bbd64393c3..2ed6add994 100644
--- a/src/or/connection_or.c
+++ b/src/or/connection_or.c
@@ -1075,7 +1075,8 @@ connection_init_or_handshake_state(or_connection_t *conn, int started_here)
 void
 or_handshake_state_free(or_handshake_state_t *state)
 {
-  tor_assert(state);
+  if (!state)
+    return;
   memset(state, 0xBE, sizeof(or_handshake_state_t));
   tor_free(state);
 }
diff --git a/src/or/dirserv.c b/src/or/dirserv.c
index 3700cd134e..3338cd7527 100644
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@@ -1292,7 +1292,11 @@ clear_cached_dir(cached_dir_t *d)
 static void
 _free_cached_dir(void *_d)
 {
-  cached_dir_t *d = (cached_dir_t *)_d;
+  cached_dir_t *d;
+  if (!_d)
+    return;
+
+  d = (cached_dir_t *)_d;
   cached_dir_decref(d);
 }
 
diff --git a/src/or/dirvote.c b/src/or/dirvote.c
index f745db6fc4..b4f76b384f 100644
--- a/src/or/dirvote.c
+++ b/src/or/dirvote.c
@@ -1697,6 +1697,8 @@ get_detached_signatures_from_pending_consensuses(pending_consensus_t *pending,
 void
 ns_detached_signatures_free(ns_detached_signatures_t *s)
 {
+  if (!s)
+    return;
   if (s->signatures) {
     STRMAP_FOREACH(s->signatures, flavor, smartlist_t *, sigs) {
       SMARTLIST_FOREACH(sigs, document_signature_t *, sig,
diff --git a/src/or/dns.c b/src/or/dns.c
index ffd30c89d8..8951780931 100644
--- a/src/or/dns.c
+++ b/src/or/dns.c
@@ -301,6 +301,8 @@ dns_get_expiry_ttl(uint32_t ttl)
 static void
 _free_cached_resolve(cached_resolve_t *r)
 {
+  if (!r)
+    return;
   while (r->pending_connections) {
     pending_connection_t *victim = r->pending_connections;
     r->pending_connections = victim->next;
diff --git a/src/or/networkstatus.c b/src/or/networkstatus.c
index e9e8663062..c8bb03357f 100644
--- a/src/or/networkstatus.c
+++ b/src/or/networkstatus.c
@@ -266,6 +266,8 @@ static void
 vote_routerstatus_free(vote_routerstatus_t *rs)
 {
   vote_microdesc_hash_t *h, *next;
+  if (!rs)
+    return;
   tor_free(rs->version);
   tor_free(rs->status.exitsummary);
   for (h = rs->microdesc; h; h = next) {
@@ -280,6 +282,8 @@ vote_routerstatus_free(vote_routerstatus_t *rs)
 void
 routerstatus_free(routerstatus_t *rs)
 {
+  if (!rs)
+    return;
   tor_free(rs->exitsummary);
   tor_free(rs);
 }
@@ -288,6 +292,8 @@ routerstatus_free(routerstatus_t *rs)
 void
 networkstatus_v2_free(networkstatus_v2_t *ns)
 {
+  if (!ns)
+    return;
   tor_free(ns->source_address);
   tor_free(ns->contact);
   if (ns->signing_key)
diff --git a/src/or/policies.c b/src/or/policies.c
index 023cd472f2..a852ce192b 100644
--- a/src/or/policies.c
+++ b/src/or/policies.c
@@ -1276,7 +1276,8 @@ getinfo_helper_policies(control_connection_t *conn,
 void
 addr_policy_list_free(smartlist_t *lst)
 {
-  if (!lst) return;
+  if (!lst)
+    return;
   SMARTLIST_FOREACH(lst, addr_policy_t *, policy, addr_policy_free(policy));
   smartlist_free(lst);
 }
@@ -1285,19 +1286,20 @@ addr_policy_list_free(smartlist_t *lst)
 void
 addr_policy_free(addr_policy_t *p)
 {
-  if (p) {
-    if (--p->refcnt <= 0) {
-      if (p->is_canonical) {
-        policy_map_ent_t search, *found;
-        search.policy = p;
-        found = HT_REMOVE(policy_map, &policy_root, &search);
-        if (found) {
-          tor_assert(p == found->policy);
-          tor_free(found);
-        }
+  if (!p)
+    return;
+
+  if (--p->refcnt <= 0) {
+    if (p->is_canonical) {
+      policy_map_ent_t search, *found;
+      search.policy = p;
+      found = HT_REMOVE(policy_map, &policy_root, &search);
+      if (found) {
+        tor_assert(p == found->policy);
+        tor_free(found);
       }
-      tor_free(p);
     }
+    tor_free(p);
   }
 }
 
diff --git a/src/or/relay.c b/src/or/relay.c
index 00e70d95c1..ac305ce3df 100644
--- a/src/or/relay.c
+++ b/src/or/relay.c
@@ -1563,7 +1563,7 @@ clean_cell_pool(void)
 
 /** Release storage held by <b>cell</b>. */
 static INLINE void
-packed_cell_free(packed_cell_t *cell)
+packed_cell_free_unchecked(packed_cell_t *cell)
 {
   --total_cells_allocated;
   mp_pool_release(cell);
@@ -1667,7 +1667,7 @@ cell_queue_clear(cell_queue_t *queue)
   cell = queue->head;
   while (cell) {
     next = cell->next;
-    packed_cell_free(cell);
+    packed_cell_free_unchecked(cell);
     cell = next;
   }
   queue->head = queue->tail = NULL;
@@ -1913,7 +1913,7 @@ connection_or_flush_from_first_active_circuit(or_connection_t *conn, int max,
 
     connection_write_to_buf(cell->body, CELL_NETWORK_SIZE, TO_CONN(conn));
 
-    packed_cell_free(cell);
+    packed_cell_free_unchecked(cell);
     ++n_flushed;
     if (circ != conn->active_circuits) {
       /* If this happens, the current circuit just got made inactive by
diff --git a/src/or/rendcommon.c b/src/or/rendcommon.c
index 9055f981bb..a68ee0c501 100644
--- a/src/or/rendcommon.c
+++ b/src/or/rendcommon.c
@@ -22,6 +22,8 @@ rend_cmp_service_ids(const char *one, const char *two)
 void
 rend_service_descriptor_free(rend_service_descriptor_t *desc)
 {
+  if (!desc)
+    return;
   if (desc->pk)
     crypto_free_pk_env(desc->pk);
   if (desc->intro_nodes) {
@@ -414,6 +416,8 @@ void
 rend_encoded_v2_service_descriptor_free(
   rend_encoded_v2_service_descriptor_t *desc)
 {
+  if (!desc)
+    return;
   tor_free(desc->desc_str);
   tor_free(desc);
 }
@@ -422,6 +426,8 @@ rend_encoded_v2_service_descriptor_free(
 void
 rend_intro_point_free(rend_intro_point_t *intro)
 {
+  if (!intro)
+    return;
   if (intro->extend_info)
     extend_info_free(intro->extend_info);
   if (intro->intro_key)
diff --git a/src/or/rendservice.c b/src/or/rendservice.c
index b6981d6258..445fbffb04 100644
--- a/src/or/rendservice.c
+++ b/src/or/rendservice.c
@@ -87,7 +87,8 @@ num_rend_services(void)
 static void
 rend_authorized_client_free(rend_authorized_client_t *client)
 {
-  if (!client) return;
+  if (!client)
+    return;
   if (client->client_key)
     crypto_free_pk_env(client->client_key);
   tor_free(client->client_name);
@@ -106,7 +107,9 @@ rend_authorized_client_strmap_item_free(void *authorized_client)
 static void
 rend_service_free(rend_service_t *service)
 {
-  if (!service) return;
+  if (!service)
+    return;
+
   tor_free(service->directory);
   SMARTLIST_FOREACH(service->ports, void*, p, tor_free(p));
   smartlist_free(service->ports);
@@ -134,9 +137,9 @@ rend_service_free(rend_service_t *service)
 void
 rend_service_free_all(void)
 {
-  if (!rend_service_list) {
+  if (!rend_service_list)
     return;
-  }
+
   SMARTLIST_FOREACH(rend_service_list, rend_service_t*, ptr,
                     rend_service_free(ptr));
   smartlist_free(rend_service_list);
diff --git a/src/or/rephist.c b/src/or/rephist.c
index 1ff9cde69f..78ceb5f0d7 100644
--- a/src/or/rephist.c
+++ b/src/or/rephist.c
@@ -2272,6 +2272,8 @@ static void
 hs_usage_general_period_related_observations_free(
                              hs_usage_general_period_related_observations_t *s)
 {
+  if (!s)
+    return;
   rephist_total_alloc-=sizeof(hs_usage_general_period_related_observations_t);
   tor_free(s);
 }
@@ -2281,6 +2283,8 @@ static void
 hs_usage_current_observation_period_free(
                                     hs_usage_current_observation_period_t *s)
 {
+  if (!s)
+    return;
   rephist_total_alloc -= sizeof(hs_usage_current_observation_period_t);
   tor_free(s);
 }
diff --git a/src/or/routerlist.c b/src/or/routerlist.c
index 18d656d222..3484338e50 100644
--- a/src/or/routerlist.c
+++ b/src/or/routerlist.c
@@ -2378,6 +2378,9 @@ extrainfo_free(extrainfo_t *extrainfo)
 static void
 signed_descriptor_free(signed_descriptor_t *sd)
 {
+  if (!sd)
+    return;
+
   tor_free(sd->signed_descriptor_body);
 
   /* XXXX remove this once more bugs go away. */
@@ -2409,7 +2412,8 @@ _extrainfo_free(void *e)
 void
 routerlist_free(routerlist_t *rl)
 {
-  tor_assert(rl);
+  if (!rl)
+    return;
   rimap_free(rl->identity_map, NULL);
   sdmap_free(rl->desc_digest_map, NULL);
   sdmap_free(rl->desc_by_eid_map, NULL);
@@ -3779,6 +3783,9 @@ authority_cert_free(authority_cert_t *cert)
 static void
 trusted_dir_server_free(trusted_dir_server_t *ds)
 {
+  if (!ds)
+    return;
+
   tor_free(ds->nickname);
   tor_free(ds->description);
   tor_free(ds->address);
@@ -5305,6 +5312,9 @@ routerset_equal(const routerset_t *old, const routerset_t *new)
 void
 routerset_free(routerset_t *routerset)
 {
+  if (!routerset)
+    return;
+
   SMARTLIST_FOREACH(routerset->list, char *, cp, tor_free(cp));
   smartlist_free(routerset->list);
   SMARTLIST_FOREACH(routerset->policies, addr_policy_t *, p,
diff --git a/src/or/routerparse.c b/src/or/routerparse.c
index 1f89cffa01..864056f44f 100644
--- a/src/or/routerparse.c
+++ b/src/or/routerparse.c
@@ -151,7 +151,7 @@ typedef enum {
  * type.
  *
  * This structure is only allocated in memareas; do not allocate it on
- * the heap, or token_free() won't work.
+ * the heap, or token_clear() won't work.
  */
 typedef struct directory_token_t {
   directory_keyword tp;        /**< Type of the token. */
@@ -523,7 +523,7 @@ static int router_get_hash_impl(const char *s, char *digest,
 static int router_get_hashes_impl(const char *s, digests_t *digests,
                                   const char *start_str, const char *end_str,
                                   char end_char);
-static void token_free(directory_token_t *tok);
+static void token_clear(directory_token_t *tok);
 static smartlist_t *find_all_exitpolicy(smartlist_t *s);
 static directory_token_t *_find_by_keyword(smartlist_t *s,
                                            directory_keyword keyword,
@@ -844,7 +844,7 @@ router_parse_directory(const char *str)
                             CST_CHECK_AUTHORITY, "directory")<0)
     goto err;
 
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_clear(tokens);
   memarea_clear(area);
 
@@ -882,7 +882,7 @@ router_parse_directory(const char *str)
  done:
   if (declared_key) crypto_free_pk_env(declared_key);
   if (tokens) {
-    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
     smartlist_free(tokens);
   }
   if (area) {
@@ -948,7 +948,7 @@ router_parse_runningrouters(const char *str)
   dump_desc(str_dup, "v1 running-routers");
   if (declared_key) crypto_free_pk_env(declared_key);
   if (tokens) {
-    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
     smartlist_free(tokens);
   }
   if (area) {
@@ -998,7 +998,7 @@ find_dir_signing_key(const char *str, const char *eos)
   }
 
  done:
-  if (tok) token_free(tok);
+  if (tok) token_clear(tok);
   if (area) {
     DUMP_AREA(area, "dir-signing-key token");
     memarea_drop_all(area);
@@ -1551,7 +1551,7 @@ router_parse_entry_from_string(const char *s, const char *end,
   router = NULL;
  done:
   if (tokens) {
-    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
     smartlist_free(tokens);
   }
   if (exit_policy_tokens) {
@@ -1677,7 +1677,7 @@ extrainfo_parse_entry_from_string(const char *s, const char *end,
   extrainfo = NULL;
  done:
   if (tokens) {
-    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
     smartlist_free(tokens);
   }
   if (area) {
@@ -1848,7 +1848,7 @@ authority_cert_parse_from_string(const char *s, const char **end_of_string)
   if (end_of_string) {
     *end_of_string = eat_whitespace(eos);
   }
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_free(tokens);
   if (area) {
     DUMP_AREA(area, "authority cert");
@@ -1858,7 +1858,7 @@ authority_cert_parse_from_string(const char *s, const char **end_of_string)
  err:
   dump_desc(s_dup, "authority cert");
   authority_cert_free(cert);
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_free(tokens);
   if (area) {
     DUMP_AREA(area, "authority cert");
@@ -2129,7 +2129,7 @@ routerstatus_parse_entry_from_string(memarea_t *area,
     routerstatus_free(rs);
   rs = NULL;
  done:
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_clear(tokens);
   if (area) {
     DUMP_AREA(area, "routerstatus entry");
@@ -2280,7 +2280,7 @@ networkstatus_v2_parse_from_string(const char *s)
 
   ns->entries = smartlist_create();
   s = eos;
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_clear(tokens);
   memarea_clear(area);
   while (!strcmpstart(s, "r ")) {
@@ -2320,9 +2320,9 @@ networkstatus_v2_parse_from_string(const char *s)
     networkstatus_v2_free(ns);
   ns = NULL;
  done:
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_free(tokens);
-  SMARTLIST_FOREACH(footer_tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(footer_tokens, directory_token_t *, t, token_clear(t));
   smartlist_free(footer_tokens);
   if (area) {
     DUMP_AREA(area, "v2 networkstatus");
@@ -2799,7 +2799,7 @@ networkstatus_parse_vote_from_string(const char *s, const char **eos_out,
   ns = NULL;
  done:
   if (tokens) {
-    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
     smartlist_free(tokens);
   }
   if (voter) {
@@ -2814,11 +2814,11 @@ networkstatus_parse_vote_from_string(const char *s, const char **eos_out,
     tor_free(voter);
   }
   if (rs_tokens) {
-    SMARTLIST_FOREACH(rs_tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(rs_tokens, directory_token_t *, t, token_clear(t));
     smartlist_free(rs_tokens);
   }
   if (footer_tokens) {
-    SMARTLIST_FOREACH(footer_tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(footer_tokens, directory_token_t *, t, token_clear(t));
     smartlist_free(footer_tokens);
   }
   if (area) {
@@ -3052,7 +3052,7 @@ networkstatus_parse_detached_signatures(const char *s, const char *eos)
   ns_detached_signatures_free(sigs);
   sigs = NULL;
  done:
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_free(tokens);
   if (area) {
     DUMP_AREA(area, "detached signatures");
@@ -3108,7 +3108,7 @@ router_parse_addr_policy_item_from_string(const char *s, int assume_action)
  err:
   r = NULL;
  done:
-  token_free(tok);
+  token_clear(tok);
   if (area) {
     DUMP_AREA(area, "policy item");
     memarea_drop_all(area);
@@ -3231,9 +3231,8 @@ assert_addr_policy_ok(smartlist_t *lst)
 
 /** Free all resources allocated for <b>tok</b> */
 static void
-token_free(directory_token_t *tok)
+token_clear(directory_token_t *tok)
 {
-  tor_assert(tok);
   if (tok->key)
     crypto_free_pk_env(tok->key);
 }
@@ -3245,7 +3244,7 @@ token_free(directory_token_t *tok)
 
 #define RET_ERR(msg)                                               \
   STMT_BEGIN                                                       \
-    if (tok) token_free(tok);                                      \
+    if (tok) token_clear(tok);                                      \
     tok = ALLOC_ZERO(sizeof(directory_token_t));                   \
     tok->tp = _ERR;                                                \
     tok->error = STRDUP(msg);                                      \
@@ -3523,7 +3522,7 @@ tokenize_string(memarea_t *area,
     tok = get_next_token(area, s, end, table);
     if (tok->tp == _ERR) {
       log_warn(LD_DIR, "parse error: %s", tok->error);
-      token_free(tok);
+      token_clear(tok);
       return -1;
     }
     ++counts[tok->tp];
@@ -4270,7 +4269,7 @@ rend_parse_v2_service_descriptor(rend_service_descriptor_t **parsed_out,
   result = NULL;
  done:
   if (tokens) {
-    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
     smartlist_free(tokens);
   }
   if (area)
@@ -4428,7 +4427,7 @@ rend_parse_introduction_points(rend_service_descriptor_t *parsed,
       eos = eos+1;
     tor_assert(eos <= intro_points_encoded+intro_points_encoded_size);
     /* Free tokens and clear token list. */
-    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
     smartlist_clear(tokens);
     memarea_clear(area);
     /* Tokenize string. */
@@ -4501,7 +4500,7 @@ rend_parse_introduction_points(rend_service_descriptor_t *parsed,
 
  done:
   /* Free tokens and clear token list. */
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_free(tokens);
   if (area)
     memarea_drop_all(area);
@@ -4540,7 +4539,7 @@ rend_parse_client_keys(strmap_t *parsed_clients, const char *ckstr)
     else
       eos = eos + 1;
     /* Free tokens and clear token list. */
-    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+    SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
     smartlist_clear(tokens);
     memarea_clear(area);
     /* Tokenize string. */
@@ -4612,7 +4611,7 @@ rend_parse_client_keys(strmap_t *parsed_clients, const char *ckstr)
   result = -1;
  done:
   /* Free tokens and clear token list. */
-  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_free(t));
+  SMARTLIST_FOREACH(tokens, directory_token_t *, t, token_clear(t));
   smartlist_free(tokens);
   if (area)
     memarea_drop_all(area);