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Improved checking of the location of MFT 

Terminate cleanly when the MFT is improperly located, by making sure it
is located within the volume and that it contains its own data.
pull/2/head
Jean-Pierre André 2021-03-05 10:21:36 +01:00
parent e5ee8b325c
commit 2ede3b67ee
1 changed files with 9 additions and 0 deletions
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9
libntfs-3g/volume.c
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@ -355,6 +355,11 @@ mft_has_no_attr_list:
ntfs_log_perror("ntfs_mapping_pairs_decompress() failed");
goto error_exit;
}
/* Make sure $DATA is the MFT itself */
if (nrl->lcn != vol->mft_lcn) {
ntfs_log_perror("The MFT is not self-contained");
goto error_exit;
}
vol->mft_na->rl = nrl;
/* Get the lowest vcn for the next extent. */
@ -601,6 +606,10 @@ ntfs_volume *ntfs_volume_startup(struct ntfs_device *dev,
vol->mft_zone_end = vol->mft_lcn + mft_zone_size;
while (vol->mft_zone_end >= vol->nr_clusters) {
mft_zone_size >>= 1;
if (!mft_zone_size) {
errno = EINVAL;
goto error_exit;
}
vol->mft_zone_end = vol->mft_lcn + mft_zone_size;
}
ntfs_log_debug("mft_zone_end = 0x%llx\n", (long long)vol->mft_zone_end);