From a2753429bf1f8035d19e230248bd515029339050 Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Fri, 14 Aug 2026 23:17:27 +0100
Subject: [PATCH] Fix fixup of chunk length for pre-allocated 64-bit sized
 chunks

---
 renderdoc/serialise/serialiser.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/renderdoc/serialise/serialiser.cpp b/renderdoc/serialise/serialiser.cpp
index a3ee578fe..4122dee9b 100644
--- a/renderdoc/serialise/serialiser.cpp
+++ b/renderdoc/serialise/serialiser.cpp
@@ -500,13 +500,15 @@ void Serialiser<SerialiserMode::Writing>::EndChunk()
 
     RDCASSERT(curOffset > chunkOffset);
 
-    uint64_t chunkLength = (curOffset - chunkOffset) - sizeof(uint32_t);
+    uint64_t chunkLength = (curOffset - chunkOffset);
     if(m_ChunkMetadata.length == LARGE_CHUNK_SIZE)
     {
+      chunkLength -= sizeof(uint64_t);
       m_Write->WriteAt(chunkOffset, chunkLength);
     }
     else
     {
+      chunkLength -= sizeof(uint32_t);
       if(chunkLength > 0xffffffff)
       {
         RDCERR("!!! CHUNK LENGTH %llu EXCEEDED 32 BIT VALUE. CAPTURE WILL BE CORRUPTED. !!!",