From 56bf6a79f773419d21e0426915c7b3a3951d1bdf Mon Sep 17 00:00:00 2001
From: Jonathan Hui <jonhui@nestlabs.com>
Date: Tue, 6 Feb 2018 17:23:53 +0000
Subject: [PATCH] [network-data] add length validation to Service TLV (#2542)

Credit to OSS-Fuzz.
---
 src/core/thread/network_data_leader_ftd.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/thread/network_data_leader_ftd.cpp b/src/core/thread/network_data_leader_ftd.cpp
index 6f5418cf5..fb358d8d6 100644
--- a/src/core/thread/network_data_leader_ftd.cpp
+++ b/src/core/thread/network_data_leader_ftd.cpp
@@ -862,6 +862,7 @@ otError Leader::AddService(ServiceTlv &aService, uint8_t *aOldTlvs, uint8_t aOld
     NetworkDataTlv *cur;
     NetworkDataTlv *end;
 
+    VerifyOrExit(aService.IsValid(), error = OT_ERROR_PARSE);
     cur = aService.GetSubTlvs();
     end = aService.GetNext();