From 8aba4119f70e9d2b1f61f72fe2bf959adbb279a7 Mon Sep 17 00:00:00 2001
From: cjihrig <cjihrig@gmail.com>
Date: Mon, 23 May 2016 10:55:48 -0400
Subject: [PATCH] cluster: close ownerless handles on disconnect()

When a worker is disconnecting, it shuts down all of the handles
it is waiting on. It is possible that a handle does not have an
owner, which causes a crash. This commit closes such handles
without accessing the missing owner.

Fixes: https://github.com/nodejs/node/issues/6561
PR-URL: https://github.com/nodejs/node/pull/6909
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
---
 lib/cluster.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/cluster.js b/lib/cluster.js
index e4bbd5f3ff7838..62eb78eeba113e 100644
--- a/lib/cluster.js
+++ b/lib/cluster.js
@@ -703,7 +703,11 @@ function workerInit() {
       const handle = handles[key];
       delete handles[key];
       waitingCount++;
-      handle.owner.close(checkWaitingCount);
+
+      if (handle.owner)
+        handle.owner.close(checkWaitingCount);
+      else
+        handle.close(checkWaitingCount);
     }
 
     checkWaitingCount();