From a61e98ea0f4b22b5206833af4694f0986ad8d157 Mon Sep 17 00:00:00 2001
From: Jonathan Hui <jonhui@nestlabs.com>
Date: Fri, 28 Jul 2017 15:45:10 -0700
Subject: [PATCH] [fuzz] bypass UDP checksum verification in fuzz tests (#2043)

---
 src/core/net/udp6.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/core/net/udp6.cpp b/src/core/net/udp6.cpp
index 1b38cc43d..791305949 100644
--- a/src/core/net/udp6.cpp
+++ b/src/core/net/udp6.cpp
@@ -216,7 +216,10 @@ otError Udp::HandleMessage(Message &aMessage, MessageInfo &aMessageInfo)
     checksum = Ip6::ComputePseudoheaderChecksum(aMessageInfo.GetPeerAddr(), aMessageInfo.GetSockAddr(),
                                                 payloadLength, kProtoUdp);
     checksum = aMessage.UpdateChecksum(checksum, aMessage.GetOffset(), payloadLength);
+
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
     VerifyOrExit(checksum == 0xffff, error = OT_ERROR_DROP);
+#endif
 
     VerifyOrExit(aMessage.Read(aMessage.GetOffset(), sizeof(udpHeader), &udpHeader) == sizeof(udpHeader),
                  error = OT_ERROR_PARSE);