From bf80455a7426c16d1f899909d5ff2b3291427526 Mon Sep 17 00:00:00 2001
From: "jaesick.shin" <jaesick.shin@samsung.com>
Date: Mon, 1 Aug 2016 11:28:04 +0900
Subject: [PATCH] bug fixes for check null in NSProviderMemoryCache.

Added check null about list and list->head.

Change-Id: Ie1df2395a14d20a012383d7f5865e96fc2405b91
Signed-off-by: jaesick.shin <jaesick.shin@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/9877
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Hun-je Yeon <hunje.yeon@samsung.com>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>
---
 .../notification/src/provider/cache/linux/NSProviderMemoryCache.c   | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/service/notification/src/provider/cache/linux/NSProviderMemoryCache.c b/service/notification/src/provider/cache/linux/NSProviderMemoryCache.c
index 305bd8f..8be56ba 100755
--- a/service/notification/src/provider/cache/linux/NSProviderMemoryCache.c
+++ b/service/notification/src/provider/cache/linux/NSProviderMemoryCache.c
@@ -295,6 +295,12 @@ bool NSIsSameObId(NSCacheSubData * data, OCObservationId id)
 
 NSResult NSProviderDeleteSubDataFromObId(NSCacheList * list, OCObservationId id)
 {
+    if(!list || !list->head)
+    {
+        NS_LOG(INFO, "list is NULL");
+        return NS_FAIL;
+    }
+
     pthread_mutex_lock(&NSCacheMutex);
     NSCacheElement * prev = list->head;
     NSCacheElement * del = list->head;
-- 
2.7.4