From ae7027a36f47b15dd2126c0e3233c742f0c9d331 Mon Sep 17 00:00:00 2001
From: Osyotr <Osyotr@users.noreply.github.com>
Date: Sun, 24 Dec 2023 18:57:51 +0300
Subject: [PATCH] Fix invalid memory usage in MemWriter

Case 1: `m_Data.size() == 0 && m_Pos == 0` => `resize` is not called.
Case 2: `size == 0` => access to `m_Data[m_Data.size()]`

Signed-off-by: Osyotr <Osyotr@users.noreply.github.com>
---
 coding/writer.hpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/coding/writer.hpp b/coding/writer.hpp
index d7a593c87a..45101d1e60 100644
--- a/coding/writer.hpp
+++ b/coding/writer.hpp
@@ -61,8 +61,11 @@ public:
 
   void Write(void const * p, size_t size) override
   {
+    if (size == 0)
+        return;
+
     auto freeSize = static_cast<intptr_t>(m_Data.size() - m_Pos);
-    if (freeSize < 0)
+    if (freeSize <= 0)
     {
       m_Data.resize(static_cast<size_t>(m_Pos + size));
       freeSize = size;