From 9dd266e85a56abbbf308aa4bbad7cc807c0d77bf Mon Sep 17 00:00:00 2001
From: "Frederick F. Kautz IV" <fkautz@alumni.cmu.edu>
Date: Mon, 27 Feb 2017 18:30:58 -0800
Subject: [PATCH] Guard against null dereference when no workers are running

---
 src/worker.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/worker.c b/src/worker.c
index 332b098..4a48858 100644
--- a/src/worker.c
+++ b/src/worker.c
@@ -1875,6 +1875,10 @@ void workers_stop(int stop_all)
 		 * It's cool enough to be able to reconfigure at all.
 		 */
 		w = worker_threads;
+		if (w == NULL) {
+			hlog(LOG_CRIT, "Cannot stop worker threads, none running");
+			abort();
+		}
 		while ((w) && (w->next))
 			w = w->next;