From 732383c0360e8180e063987f83324306fd7c6a84 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Fri, 10 Jan 2025 02:06:25 -0500
Subject: [PATCH] limit max sample size when loading .dmf

---
 src/engine/fileOps/dmf.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/engine/fileOps/dmf.cpp b/src/engine/fileOps/dmf.cpp
index 6da165ced..d4501a996 100644
--- a/src/engine/fileOps/dmf.cpp
+++ b/src/engine/fileOps/dmf.cpp
@@ -910,7 +910,8 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
       int vol=50;
       short* data;
       unsigned char* adpcmData;
-      if (length<0) {
+      // I don't think a sample can be that big
+      if (length<0 || length>(1<<29L)) {
         logE("invalid sample length %d. are we doing something wrong?",length);
         lastError="file is corrupt or unreadable at samples";
         delete[] file;