[pkg-cryptsetup-devel] Bug#644082: Some more investigations

[Bernhard]

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Hello Jonas

Thank you for your great support.
I have tested some things on my test computer (Debian sid):

> That doesn't imply that it's a bug in cryptsetup.
> It might as well be a bug in gnome, udev, linux kernel, etc.
Yes, that's true.
But i don't know, which package has the bug.
Do you have any idea?
Is this behaviour reproducable on your computer?
Today, i have setup a second test computer with Debian sid.
The same behaviour.

> Do the processes which access the filesystem (scsi_eh_5 and usb-storage) disappear after some time?
After error message, i have waited 1 minute.
The processes don't disappear.

> You should check which processes read/write to the device by executing 'lsof <device>'
> (e.g. '/dev/mapper/udisks-luks-uuid-1234-5678-90ab-cdef12345678-uid1000')
No output.
/dev/mapper/udisks-luks-uuid-xxxx is a link.
Is this correct?
After unmount, /dev/mapper/udisks-luks-uuid-xxxx is no more available

> and 'fuser -m <mount_point>', (e.g. '/media/fedcba09-8765-4321-fedc-ba09-87654321fedc').
No output.
After unmount, /media/xxxx is no more available.

> This indeed sounds like a udev-related bug then.
> Please do further investigation.
I have looked in internet with Google and found an interesting bug
report for Ubuntu:
> https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/529502
It seems, there is a problem with the unmounting sequence (umount and
luksClose).
If i mount and unmount my encrypted device in Terminal, everything seems
fine.
Only for information: my encrypted device is formatted with ext4.

If i should further tests, please let me know.

Best regards and thank you for the great support.
Bernhard
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