libfdata_vector_get_element_index_at_offset: invalid element index value exceeds maximum

[jbothma]

Well done and thanks for this awesome library and great instructions!

I'm trying to mount an external drive. it seems to do the first mount fine, but I get the following when I mount the fvde file:

sudo mount -o loop,ro /home/bob/fvdemount /home/bob/mydisk
mount: wrong fs type, bad option, bad superblock on /dev/loop2,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

dmesg says

[82149.950167] blk_update_request: I/O error, dev loop2, sector 7812579200
[82149.950173] buffer_io_error: 6 callbacks suppressed
[82149.950176] Buffer I/O error on dev loop2, logical block 976572400, async page read
[82149.950277] blk_update_request: I/O error, dev loop2, sector 7812579200
[82149.950282] Buffer I/O error on dev loop2, logical block 976572400, async page read
[82149.953333] blk_update_request: I/O error, dev loop2, sector 7812579326

fvdemount -v says

sudo fvdemount -r mypassword -v /dev/sdc2 /home/bob/fvdemount
fvdemount ...
libfdata_vector_get_element_index_at_offset: invalid element index value exceeds maximum.
libfdata_vector_get_element_value_at_offset: unable to retrieve element index at offset: 0x3a354ff0000.
libfvde_internal_volume_read_buffer_from_file_io_handle: unable to retrieve sector data at offset: 4000040550400.
libfvde_volume_read_buffer: unable to read buffer.
mount_handle_read_buffer: unable to read buffer from input volume.
fvdemount_fuse_read: unable to read from mount handle.

eight times with different values of data offset.

fsck.hfsplus says

sudo fsck.hfsplus -q /home/bob/fvdemount/fvde1
** /home/bob/fvdemount (NO WRITE)
QUICKCHECK ONLY; FILESYSTEM CLEAN

Does the error mean anything to you?

[joachimmetz]

it could be that the source image truncated or that the size of the encrypted volume is detected incorrectly can you provide me with format debug output. Also see: https://github.com/libyal/libfvde/wiki/Troubleshooting#format-or-behavioral-errors

[jbothma]

Sorry, I had to give the drive back after borrowing it. If I have access again I'll try and give more info.

[hackob]

I'm having the same problem described here:

Command ouput:

[root@linux]~# mount -o loop,ro /mnt/fvdevolume/fvde1 /mnt/ntfs_file_system
mount: /mnt/ntfs_file_system: can't read superblock on /dev/loop0.

Verbose:

libfdata_vector_get_element_index_at_offset: invalid element index value exceeds maximum.
libfdata_vector_get_element_value_at_offset: unable to retrieve element index at offset: 0x1d19329f000.
libfvde_internal_volume_read_buffer_from_file_io_handle: unable to retrieve sector data at offset: 1999628791808.
libfvde_volume_read_buffer: unable to read buffer.
mount_handle_read_buffer: unable to read buffer from input volume.
fvdemount_fuse_read: unable to read from mount handle.

dmesg:

[73694.449238] print_req_error: I/O error, dev loop0, sector 3905524864
[73694.449283] print_req_error: I/O error, dev loop0, sector 3905524864
[73694.449286] Buffer I/O error on dev loop0, logical block 488190608, async page read
[73694.449334] print_req_error: I/O error, dev loop0, sector 3905524864
[73694.449336] Buffer I/O error on dev loop0, logical block 488190608, async page read
[73694.449780] blk_partition_remap: fail for partition 2
[73694.449781] Buffer I/O error on dev sda2, logical block 65536, async page read
[73694.449890] blk_partition_remap: fail for partition 2
[73694.449891] Buffer I/O error on dev sda2, logical block 65536, async page read
[73694.449929] print_req_error: I/O error, dev loop0, sector 2
[73694.449934] EXT4-fs (loop0): unable to read superblock
[73694.449990] blk_partition_remap: fail for partition 2
[73694.449991] Buffer I/O error on dev sda2, logical block 65536, async page read
[73694.450025] print_req_error: I/O error, dev loop0, sector 2
[73694.450029] EXT4-fs (loop0): unable to read superblock
[73694.451194] blk_partition_remap: fail for partition 2
[73694.451196] Buffer I/O error on dev sda2, logical block 65536, async page read
[73694.451279] print_req_error: I/O error, dev loop0, sector 2
[73694.451287] EXT4-fs (loop0): unable to read superblock
[73694.451406] blk_partition_remap: fail for partition 2
[73694.451407] Buffer I/O error on dev sda2, logical block 65544, async page read
[73694.451491] blk_partition_remap: fail for partition 2
[73694.451492] Buffer I/O error on dev sda2, logical block 65544, async page read
[73694.451519] print_req_error: I/O error, dev loop0, sector 64
[73694.451524] isofs_fill_super: bread failed, dev=loop0, iso_blknum=16, block=32
[73694.451592] blk_partition_remap: fail for partition 2
[73694.451593] Buffer I/O error on dev sda2, logical block 65536, async page read
[73694.451618] print_req_error: I/O error, dev loop0, sector 0
[73694.451622] FAT-fs (loop0): unable to read boot sector