From 96076d3aa4062bc568748e4136ac6b71a855382b Mon Sep 17 00:00:00 2001
From: Jonathan Hui <jonhui@nestlabs.com>
Date: Tue, 29 Jan 2019 08:55:59 -0800
Subject: [PATCH] [coap] process Option Length = 0xf as a format error (#3530)

---
 src/core/coap/coap_message.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/coap/coap_message.cpp b/src/core/coap/coap_message.cpp
index 5580e0a08..627302535 100644
--- a/src/core/coap/coap_message.cpp
+++ b/src/core/coap/coap_message.cpp
@@ -268,7 +268,7 @@ const otCoapOption *Message::GetNextOption(void)
     }
     else
     {
-        ExitNow();
+        ExitNow(error = OT_ERROR_PARSE);
     }
 
     VerifyOrExit(optionLength <= GetLength() - GetHelpData().mNextOptionOffset, error = OT_ERROR_PARSE);