NTFS: Fix a 64-bitness bug where a left-shift could overflow a 32-bit variable

      which we now cast to 64-bit first (fs/ntfs/mft.c::map_mft_record_page().

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

3 files changed, 4 insertions, 3 deletions

diff --git a/fs/ntfs/layout.h b/fs/ntfs/layout.h
index 01f2dfa39ce..5c248d404f0 100644
--- a/fs/ntfs/layout.h
+++ b/fs/ntfs/layout.h
@@ -309,7 +309,7 @@ typedef le16 MFT_RECORD_FLAGS;
  * Note: The _LE versions will return a CPU endian formatted value!
  */
 #define MFT_REF_MASK_CPU 0x0000ffffffffffffULL
-#define MFT_REF_MASK_LE const_cpu_to_le64(0x0000ffffffffffffULL)
+#define MFT_REF_MASK_LE const_cpu_to_le64(MFT_REF_MASK_CPU)
 
 typedef u64 MFT_REF;
 typedef le64 leMFT_REF;
diff --git a/fs/ntfs/mft.c b/fs/ntfs/mft.c
index 247586d1d5d..b011369b595 100644
--- a/fs/ntfs/mft.c
+++ b/fs/ntfs/mft.c
@@ -58,7 +58,8 @@ static inline MFT_RECORD *map_mft_record_page(ntfs_inode *ni)
          * overflowing the unsigned long, but I don't think we would ever get
          * here if the volume was that big...
          */
-        index = ni->mft_no << vol->mft_record_size_bits >> PAGE_CACHE_SHIFT;
+        index = (u64)ni->mft_no << vol->mft_record_size_bits >>
+                        PAGE_CACHE_SHIFT;
         ofs = (ni->mft_no << vol->mft_record_size_bits) & ~PAGE_CACHE_MASK;
 
         i_size = i_size_read(mft_vi);
diff --git a/fs/ntfs/unistr.c b/fs/ntfs/unistr.c
index a389a5a16c8..0ea887fc859 100644
--- a/fs/ntfs/unistr.c
+++ b/fs/ntfs/unistr.c
@@ -1,7 +1,7 @@
 /*
  * unistr.c - NTFS Unicode string handling. Part of the Linux-NTFS project.
  *
- * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2001-2005 Anton Altaparmakov
  *
  * This program/include file is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as published