From 8157f54c6d110d75d837a56063249da3d5e951fc Mon Sep 17 00:00:00 2001
From: Alberto Gallegos Ramonet <alramonet@is.tokushima-u.ac.jp>
Date: Mon, 22 Jul 2024 16:56:20 +0900
Subject: [PATCH] lr-wpan: Fix sanitizer issue in SendOneBeacon

---
 src/lr-wpan/model/lr-wpan-mac.cc | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/lr-wpan/model/lr-wpan-mac.cc b/src/lr-wpan/model/lr-wpan-mac.cc
index 88d4feb37..930bfe884 100644
--- a/src/lr-wpan/model/lr-wpan-mac.cc
+++ b/src/lr-wpan/model/lr-wpan-mac.cc
@@ -1008,9 +1008,17 @@ LrWpanMac::SendOneBeacon()
 
     m_macBsn++;
 
-    // Extract the octets from m_macBeaconPayload and place them in a packet
-    uint8_t* octets = &m_macBeaconPayload[0];
-    Ptr<Packet> beaconPacket = Create<Packet>(octets, m_macBeaconPayload.size());
+    Ptr<Packet> beaconPacket;
+    if (m_macBeaconPayload.empty())
+    {
+        beaconPacket = Create<Packet>();
+    }
+    else
+    {
+        // Extract the octets from m_macBeaconPayload and place them in a packet
+        uint8_t* octets = &m_macBeaconPayload[0];
+        beaconPacket = Create<Packet>(octets, m_macBeaconPayload.size());
+    }
 
     LrWpanMacHeader macHdr(LrWpanMacHeader::LRWPAN_MAC_BEACON, m_macBsn.GetValue());
     macHdr.SetDstAddrMode(LrWpanMacHeader::SHORTADDR);