From: Nick Mathewson <nickm@torproject.org>
Date: Wed, 15 Mar 2017 13:19:00 +0000 (-0400)
Subject: Avoid a double-mark bug when makring a pending circuit as "too old"
X-Git-Tag: tor-0.3.0.5-rc~10^2^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ec5fe41209add4b216029466774a6b7e833210ef;p=thirdparty%2Ftor.git

Avoid a double-mark bug when makring a pending circuit as "too old"

Fixes bug 20059; bugfix on 0.1.0.1-rc.
---

diff --git a/changes/bug20059 b/changes/bug20059
new file mode 100644
index 0000000000..091fab06d1
--- /dev/null
+++ b/changes/bug20059
@@ -0,0 +1,3 @@
+  o Minor bugfixes (relay):
+    - Avoid a double-marked-circuit warning that can happen when we receive
+      DESTROY cells under heavy load. Fixes bug 20059; bugfix on 0.1.0.1-rc.
diff --git a/src/or/onion.c b/src/or/onion.c
index 1a0bcf106e..de4b6a5845 100644
--- a/src/or/onion.c
+++ b/src/or/onion.c
@@ -184,7 +184,9 @@ onion_pending_add(or_circuit_t *circ, create_cell_t *onionskin)
     onion_queue_entry_remove(head);
     log_info(LD_CIRC,
              "Circuit create request is too old; canceling due to overload.");
-    circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_RESOURCELIMIT);
+    if (! TO_CIRCUIT(circ)->marked_for_close) {
+      circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_RESOURCELIMIT);
+    }
   }
   return 0;
 }