From 343699a7676a72a628aa97c46aeb0706cc4d54ec Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Fri, 28 Nov 2014 11:19:20 +1100
Subject: [PATCH] Add sanity checks in pthread cancels/joins

---
 src/ckpool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ckpool.c b/src/ckpool.c
index e089ace7..13d10479 100644
--- a/src/ckpool.c
+++ b/src/ckpool.c
@@ -865,7 +865,7 @@ static void clean_up(ckpool_t *ckp)
 
 static void cancel_join_pthread(pthread_t *pth)
 {
-	if (!*pth)
+	if (!pth || !*pth)
 		return;
 	pthread_cancel(*pth);
 	join_pthread(*pth);
@@ -874,7 +874,7 @@ static void cancel_join_pthread(pthread_t *pth)
 
 static void cancel_pthread(pthread_t *pth)
 {
-	if (!*pth)
+	if (!pth || !*pth)
 		return;
 	pthread_cancel(*pth);
 	pth = NULL;