From d87a7513c6f2f2824203032ef27caeb84892ed7e Mon Sep 17 00:00:00 2001
From: Will Fancher <elvishjerricco@gmail.com>
Date: Tue, 30 May 2023 16:53:20 -0400
Subject: [PATCH] Intentionally break the fat driver

---
 FatPkg/EnhancedFatDxe/ReadWrite.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/FatPkg/EnhancedFatDxe/ReadWrite.c b/FatPkg/EnhancedFatDxe/ReadWrite.c
index 8f525044d1f1..32c62ff7817b 100644
--- a/FatPkg/EnhancedFatDxe/ReadWrite.c
+++ b/FatPkg/EnhancedFatDxe/ReadWrite.c
@@ -216,6 +216,11 @@ FatIFileAccess (
   Volume = OFile->Volume;
   Task   = NULL;
 
+  if (*BufferSize > (10U * 1024U * 1024U)) {
+    IFile->Position += 10U * 1024U * 1024U;
+    return EFI_BAD_BUFFER_SIZE;
+  }
+
   //
   // Write to a directory is unsupported
   //