*** This bug is a security vulnerability ***
You have been subscribed to a public security bug by Jamie Strandboge
(jdstrand):
Binary package hint: mount
I use an encrypted ext3 file system stored in a file. I mount this file
system through the cryptoloop module and a loop device. This approach
worked fine in 8.04. On a fresh install of 8.10 amd64 Desktop, I
receive the following when I attempt to unmount the user mounted
filesystem.
umount: /mnt/secure mount disagrees with the fstab
Here is the line in my fstab file:
/media/BigData/secure.img /mnt/secure auto
user,noauto,loop,encryption=twofish 0 0
As a regular user, I am able to execute 'mount /mnt/secure'. I get
prompted for a password and the file system is mounted on /mnt/secure as
usual.
When I attempt 'umount /mnt/secure', I get the error cited above. If I
become root, then I am able to unmount the file system. I should be
able to do it as the user that originally mounted the file system.
* I marked the bug as a security vulnerability as it requires 'root'
privileges to unmount a user mounted file system.
** Affects: util-linux (Ubuntu)
Importance: Undecided
Status: New
--
'unmount' fails for user mounted file system
https://bugs.launchpad.net/bugs/295944
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