1 files changed, 11 insertions, 0 deletions
diff --git a/src/or/relay.c b/src/or/relay.c
index 9917dbb74e..912f4b0731 100644
--- a/src/or/relay.c
+++ b/src/or/relay.c
@@ -419,6 +419,11 @@ circuit_package_relay_cell(cell_t *cell, circuit_t *circ,
 {
   channel_t *chan; /* where to send the cell */
 
+  if (circ->marked_for_close) {
+    /* Circuit is marked; send nothing. */
+    return 0;
+  }
+
   if (cell_direction == CELL_DIRECTION_OUT) {
     crypt_path_t *thishop; /* counter for repeated crypts */
     chan = circ->n_chan;
@@ -732,6 +737,12 @@ connection_edge_send_command(edge_connection_t *fromconn,
     return -1;
   }
 
+  if (circ->marked_for_close) {
+    /* The circuit has been marked, but not freed yet. When it's freed, it
+     * will mark this connection for close. */
+    return -1;
+  }
+
   return relay_send_command_from_edge(fromconn->stream_id, circ,
                                       relay_command, payload,
                                       payload_len, cpath_layer);