From 41c2d89b1745beeb16c59a11e9bd8a6da1e518c7 Mon Sep 17 00:00:00 2001
From: Robert Nagy <ronagy@icloud.com>
Date: Thu, 15 Aug 2024 08:17:05 +0200
Subject: [PATCH] buffer: properly apply offset on fast path

PR-URL: https://github.com/nodejs/node/pull/54391
---
 src/node_buffer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/node_buffer.cc b/src/node_buffer.cc
index 0e1881eeb5f16d..d9745af160136d 100644
--- a/src/node_buffer.cc
+++ b/src/node_buffer.cc
@@ -1481,7 +1481,7 @@ uint32_t FastWriteString(Local<Value> receiver,
 
   max_length = std::min<uint32_t>(dst.length() - offset, max_length);
 
-  memcpy(dst_data, src.data, max_length);
+  memcpy(dst_data + offset, src.data, max_length);
 
   return max_length;
 }