From dcef60424d01dc4cc67a27e87f7539a021a5ee21 Mon Sep 17 00:00:00 2001
From: Pierre Schweitzer <pierre@reactos.org>
Date: Sun, 14 Feb 2016 22:44:54 +0000
Subject: [PATCH] [NTFS] Cowardly refuse to continue processing
 (enumerating/reading) when stumbling upon a compressed entry. This avoids
 infinite loops when enumerating, incorrect files contents when reading.

CORE-10814 #resolve #comment 'Fixed' with r70750

svn path=/trunk/; revision=70750
---
 reactos/drivers/filesystems/ntfs/dirctl.c | 7 +++++++
 reactos/drivers/filesystems/ntfs/fcb.c    | 6 ++++++
 reactos/drivers/filesystems/ntfs/ntfs.h   | 3 +++
 reactos/drivers/filesystems/ntfs/rw.c     | 7 +++++++
 4 files changed, 23 insertions(+)

diff --git a/reactos/drivers/filesystems/ntfs/dirctl.c b/reactos/drivers/filesystems/ntfs/dirctl.c
index a9d16fdb12d..53e70ba8f8f 100644
--- a/reactos/drivers/filesystems/ntfs/dirctl.c
+++ b/reactos/drivers/filesystems/ntfs/dirctl.c
@@ -298,6 +298,13 @@ NtfsQueryDirectory(PNTFS_IRP_CONTEXT IrpContext)
     FileInformationClass = Stack->Parameters.QueryDirectory.FileInformationClass;
     FileIndex = Stack->Parameters.QueryDirectory.FileIndex;
 
+    if (NtfsFCBIsCompressed(Fcb))
+    {
+        DPRINT1("Compressed directory!\n");
+        UNIMPLEMENTED;
+        return STATUS_NOT_IMPLEMENTED;
+    }
+
     if (SearchPattern != NULL)
     {
         if (!Ccb->DirectorySearchPattern)
diff --git a/reactos/drivers/filesystems/ntfs/fcb.c b/reactos/drivers/filesystems/ntfs/fcb.c
index 278ea3ee9df..e3ac61fa8e4 100644
--- a/reactos/drivers/filesystems/ntfs/fcb.c
+++ b/reactos/drivers/filesystems/ntfs/fcb.c
@@ -137,6 +137,12 @@ NtfsFCBIsReparsePoint(PNTFS_FCB Fcb)
 }
 
 
+BOOLEAN
+NtfsFCBIsCompressed(PNTFS_FCB Fcb)
+{
+    return ((Fcb->Entry.FileAttributes & NTFS_FILE_TYPE_COMPRESSED) == NTFS_FILE_TYPE_COMPRESSED); 
+}
+
 BOOLEAN
 NtfsFCBIsRoot(PNTFS_FCB Fcb)
 {
diff --git a/reactos/drivers/filesystems/ntfs/ntfs.h b/reactos/drivers/filesystems/ntfs/ntfs.h
index 037bbe4e999..0ecd3159636 100644
--- a/reactos/drivers/filesystems/ntfs/ntfs.h
+++ b/reactos/drivers/filesystems/ntfs/ntfs.h
@@ -642,6 +642,9 @@ NtfsFCBIsDirectory(PNTFS_FCB Fcb);
 BOOLEAN
 NtfsFCBIsReparsePoint(PNTFS_FCB Fcb);
 
+BOOLEAN
+NtfsFCBIsCompressed(PNTFS_FCB Fcb);
+
 BOOLEAN
 NtfsFCBIsRoot(PNTFS_FCB Fcb);
 
diff --git a/reactos/drivers/filesystems/ntfs/rw.c b/reactos/drivers/filesystems/ntfs/rw.c
index 572bd850783..13e9d86595e 100644
--- a/reactos/drivers/filesystems/ntfs/rw.c
+++ b/reactos/drivers/filesystems/ntfs/rw.c
@@ -71,6 +71,13 @@ NtfsReadFile(PDEVICE_EXTENSION DeviceExt,
 
     Fcb = (PNTFS_FCB)FileObject->FsContext;
 
+    if (NtfsFCBIsCompressed(Fcb))
+    {
+        DPRINT1("Compressed file!\n");
+        UNIMPLEMENTED;
+        return STATUS_NOT_IMPLEMENTED;
+    }
+
     FileRecord = ExAllocatePoolWithTag(NonPagedPool, DeviceExt->NtfsInfo.BytesPerFileRecord, TAG_NTFS);
     if (FileRecord == NULL)
     {