From f95dae1b1b25a76c6848356a87bf041edc1be9f7 Mon Sep 17 00:00:00 2001
From: Frank <91616163+softhack007@users.noreply.github.com>
Date: Fri, 14 Nov 2025 01:40:46 +0100
Subject: [PATCH] ensure that lastFilename is always terminated properly

---
 wled00/image_loader.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/wled00/image_loader.cpp b/wled00/image_loader.cpp
index 882b6bd6..dd9054f4 100644
--- a/wled00/image_loader.cpp
+++ b/wled00/image_loader.cpp
@@ -116,7 +116,9 @@ byte renderImageToSegment(Segment &seg) {
   activeSeg = &seg;
 
   if (strncmp(lastFilename +1, seg.name, 32) != 0) { // segment name changed, load new image
+    strcpy(lastFilename, "/");  // filename always starts with '/'
     strncpy(lastFilename +1, seg.name, 32);
+    lastFilename[33] ='\0';     // ensure proper string termination when segment name was truncated
     gifDecodeFailed = false;
     size_t fnameLen = strlen(lastFilename);
     if ((fnameLen < 4) || strcmp(lastFilename + fnameLen - 4, ".gif") != 0) { // empty segment name, name too short, or name not ending in .gif