From a3d848ff8b47bfe6b1649342a6ea54e095aa7af4 Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Fri, 12 Mar 2021 18:28:10 +0100
Subject: [PATCH] CMemoryFile: fix seek bounds-checking

---
 source/Irrlicht/CMemoryFile.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/source/Irrlicht/CMemoryFile.cpp b/source/Irrlicht/CMemoryFile.cpp
index 22c57e65..a2143615 100644
--- a/source/Irrlicht/CMemoryFile.cpp
+++ b/source/Irrlicht/CMemoryFile.cpp
@@ -52,14 +52,14 @@ bool CMemoryReadFile::seek(long finalPos, bool relativeMovement)
 {
 	if (relativeMovement)
 	{
-		if (Pos + finalPos > Len)
+		if (Pos + finalPos < 0 || Pos + finalPos > Len)
 			return false;
 
 		Pos += finalPos;
 	}
 	else
 	{
-		if (finalPos > Len)
+		if (finalPos < 0 || finalPos > Len)
 			return false;
 
 		Pos = finalPos;
@@ -133,14 +133,14 @@ bool CMemoryWriteFile::seek(long finalPos, bool relativeMovement)
 {
 	if (relativeMovement)
 	{
-		if (Pos + finalPos > Len)
+		if (Pos + finalPos < 0 || Pos + finalPos > Len)
 			return false;
 
 		Pos += finalPos;
 	}
 	else
 	{
-		if (finalPos > Len)
+		if (finalPos < 0 || finalPos > Len)
 			return false;
 
 		Pos = finalPos;