NTFS: Fix bug in mft record writing where we forgot to set the device in

      the buffers when mapping them after the VM had discarded them.
      Thanks to Martin MOKREJŠ for the bug report.

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

2 files changed, 5 insertions, 0 deletions

diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 9709fac6531d..21e21fe519e2 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -174,6 +174,9 @@ ToDo/Notes:
           fact that the vfs and ntfs inodes are one struct in memory to find
           the ntfs inode in memory if present.  Also, the ntfs inode has its
           own locking so it does not matter if the vfs inode is locked.
+        - Fix bug in mft record writing where we forgot to set the device in
+          the buffers when mapping them after the VM had discarded them
+          Thanks to Martin MOKREJŠ for the bug report.
 
 2.1.22 - Many bug and race fixes and error handling improvements.
 
diff --git a/fs/ntfs/mft.c b/fs/ntfs/mft.c
index ac9ff39aa834..317f7c679fd3 100644
--- a/fs/ntfs/mft.c
+++ b/fs/ntfs/mft.c
@@ -533,6 +533,7 @@ int ntfs_sync_mft_mirror(ntfs_volume *vol, const unsigned long mft_no,
                         LCN lcn;
                         unsigned int vcn_ofs;
 
+                        bh->b_bdev = vol->sb->s_bdev;
                         /* Obtain the vcn and offset of the current block. */
                         vcn = ((VCN)mft_no << vol->mft_record_size_bits) +
                                         (block_start - m_start);
@@ -725,6 +726,7 @@ int write_mft_record_nolock(ntfs_inode *ni, MFT_RECORD *m, int sync)
                         LCN lcn;
                         unsigned int vcn_ofs;
 
+                        bh->b_bdev = vol->sb->s_bdev;
                         /* Obtain the vcn and offset of the current block. */
                         vcn = ((VCN)ni->mft_no << vol->mft_record_size_bits) +
                                         (block_start - m_start);