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    Subject[Bug 1000] New: file corruption using cryptoloop on ext2/ext3/other file systems
    http://bugme.osdl.org/show_bug.cgi?id=1000

    Summary: file corruption using cryptoloop on ext2/ext3/other file
    systems
    Kernel Version: 2.6.0-test2
    Status: NEW
    Severity: normal
    Owner: axboe@suse.de
    Submitter: kernel@gozer.org


    Distribution: unstable debian (util-linux 2.12)
    Hardware Environment: AMD K7
    Software Environment:
    Problem Description:

    Using cryptoloop, any files copied to ext2/ext3, and from what I hear anything
    other than msdos/vfat (vfat verified), leaves files corrupted.

    # this talks about files larger than system memory, but I see this with files
    # of any size.
    http://marc.theaimsgroup.com/?l=linux-kernel&m=105932373007928&w=2

    http://marc.theaimsgroup.com/?l=linux-kernel&m=105873721209176&w=2

    Steps to reproduce:

    losetup /dev/loop0 /dev/hdX -e aes
    mkfs -t ext3 /dev/loop0
    mount /dev/loop0 /mnt
    cp /tmp/some.mp3 /mnt
    umount /mnt
    losetup -d /dev/loop0

    md5sum /tmp/some.mp3

    losetup /dev/loop0 /dev/hdX -e aes
    mount /dev/loop0 /mnt
    md5sum /mnt/some.mp3

    While the fs is mounted, everything checks out ok, but as soon as you unmount
    and remount, it's all messed up.

    I created a 10MB test file, and instead of using a drive/partition as above, I
    used the file. ext2 on there worked ok, so I don't know if it's something over a
    certain size or what.


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