From 5964e02894f2d9387080fbd848f0db02abd06356 Mon Sep 17 00:00:00 2001
From: Rye <rye@alchemyviewer.org>
Date: Sun, 26 Oct 2025 02:53:52 -0400
Subject: Fix memcpy of 0 being reported as undefined behavior by ubsan

Signed-off-by: Rye <rye@alchemyviewer.org>
---
 indra/llmessage/lltemplatemessagereader.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'indra/llmessage/lltemplatemessagereader.cpp')

diff --git a/indra/llmessage/lltemplatemessagereader.cpp b/indra/llmessage/lltemplatemessagereader.cpp
index b62288590e..850d73e910 100644
--- a/indra/llmessage/lltemplatemessagereader.cpp
+++ b/indra/llmessage/lltemplatemessagereader.cpp
@@ -118,6 +118,9 @@ void LLTemplateMessageReader::getData(const char *blockname, const char *varname
     {
         switch( vardata_size )
         {
+        case 0:
+            // This is here to prevent a memcpy from a null value which is undefined behavior.
+            break;
         case 1:
             *((U8*)datap) = *((U8*)vardata.getData());
             break;
-- 
cgit v1.3