From 014a85563d502577835d1c5eb57382c96d41afef Mon Sep 17 00:00:00 2001
From: Eric Kohl <eric.kohl@reactos.org>
Date: Fri, 13 Nov 2015 19:03:34 +0000
Subject: [PATCH] [FASTFAT] Deny access when trying to overwrite a read-only
 file.

svn path=/trunk/; revision=69880
---
 reactos/drivers/filesystems/fastfat/create.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/reactos/drivers/filesystems/fastfat/create.c b/reactos/drivers/filesystems/fastfat/create.c
index eef10de5cbe..8c68650f90a 100644
--- a/reactos/drivers/filesystems/fastfat/create.c
+++ b/reactos/drivers/filesystems/fastfat/create.c
@@ -411,7 +411,8 @@ VfatOpenFile(
 
     /* Fail, if we try to overwrite a read-only file */
     if ((*Fcb->Attributes & FILE_ATTRIBUTE_READONLY) &&
-        (RequestedDisposition == FILE_OVERWRITE))
+        (RequestedDisposition == FILE_OVERWRITE ||
+         RequestedDisposition == FILE_OVERWRITE_IF))
     {
         vfatReleaseFCB(DeviceExt, Fcb);
         return STATUS_ACCESS_DENIED;
@@ -580,6 +581,8 @@ VfatCreateFile(
     if (!OpenTargetDir)
     {
         Status = VfatOpenFile(DeviceExt, &PathNameU, FileObject, RequestedDisposition, &ParentFcb);
+        if (Status == STATUS_ACCESS_DENIED)
+            return Status;
     }
     else
     {
-- 
2.17.1