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Commit 949763b2 authored by Anton Altaparmakov's avatar Anton Altaparmakov
Browse files

NTFS: Fix comparison of $MFT and $MFTMirr to not bail out when there are 


      unused, invalid mft records which are the same in both $MFT and
      $MFTMirr.

Signed-off-by: default avatarAnton Altaparmakov <aia21@cantab.net>
parent 78264bd9

fs/ntfs/ChangeLog

+3 −0
Original line number Diff line number Diff line
@@ -28,6 +28,9 @@ ToDo/Notes: 
	  continued the attribute lookup loop instead of aborting it.

	- Use buffer_migrate_page() for the ->migratepage function of all ntfs

	  address space operations.

	- Fix comparison of $MFT and $MFTMirr to not bail out when there are

	  unused, invalid mft records which are the same in both $MFT and

	  $MFTMirr.



2.1.26 - Minor bug fixes and updates.

fs/ntfs/super.c

+25 −13
Original line number Diff line number Diff line
@@ -1099,26 +1099,38 @@ static BOOL check_mft_mirror(ntfs_volume *vol) 
			kmirr = page_address(mirr_page);

			++index;

		}

		/* Do not check the record if it is not in use. */

		if (((MFT_RECORD*)kmft)->flags & MFT_RECORD_IN_USE) {

			/* Make sure the record is ok. */

			if (ntfs_is_baad_recordp((le32*)kmft)) {

			ntfs_error(sb, "Incomplete multi sector transfer "

					"detected in mft record %i.", i);

				ntfs_error(sb, "Incomplete multi sector "

						"transfer detected in mft "

						"record %i.", i);

mm_unmap_out:

				ntfs_unmap_page(mirr_page);

mft_unmap_out:

				ntfs_unmap_page(mft_page);

				return FALSE;

			}

		}

		/* Do not check the mirror record if it is not in use. */

		if (((MFT_RECORD*)kmirr)->flags & MFT_RECORD_IN_USE) {

			if (ntfs_is_baad_recordp((le32*)kmirr)) {

			ntfs_error(sb, "Incomplete multi sector transfer "

					"detected in mft mirror record %i.", i);

				ntfs_error(sb, "Incomplete multi sector "

						"transfer detected in mft "

						"mirror record %i.", i);

				goto mm_unmap_out;

			}

		}

		/* Get the amount of data in the current record. */

		bytes = le32_to_cpu(((MFT_RECORD*)kmft)->bytes_in_use);

		if (!bytes || bytes > vol->mft_record_size) {

		if (bytes < sizeof(MFT_RECORD_OLD) ||

				bytes > vol->mft_record_size ||

				ntfs_is_baad_recordp((le32*)kmft)) {

			bytes = le32_to_cpu(((MFT_RECORD*)kmirr)->bytes_in_use);

			if (!bytes || bytes > vol->mft_record_size)

			if (bytes < sizeof(MFT_RECORD_OLD) ||

					bytes > vol->mft_record_size ||

					ntfs_is_baad_recordp((le32*)kmirr))

				bytes = vol->mft_record_size;

		}

		/* Compare the two records. */