From 0b924c79ceb7b3c46d82dd00f6f1ed3f664d02d0 Mon Sep 17 00:00:00 2001
From: Lee Salzman <lsalzman@gmail.com>
Date: Fri, 28 Jun 2024 22:28:14 -0400
Subject: [PATCH] add some safety checks to enet_packet_resize

---
 packet.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/packet.c b/packet.c
index d51c6404..832cff96 100644
--- a/packet.c
+++ b/packet.c
@@ -89,9 +89,14 @@ enet_packet_resize (ENetPacket * packet, size_t dataLength)
     if (newData == NULL)
       return -1;
 
-    memcpy (newData, packet -> data, packet -> dataLength);
-    enet_free (packet -> data);
-    
+    if (packet -> data != NULL)
+    {
+       if (packet -> dataLength > 0)
+         memcpy (newData, packet -> data, packet -> dataLength);
+
+       enet_free (packet -> data);
+    }
+
     packet -> data = newData;
     packet -> dataLength = dataLength;