Arch Linux

Description:
After I upgraded to util-linux-2.21-5, I could no longer umount devices with the 'user' option in fstab as user.
[code]
$ mount /dev/sdb1
$ umount /dev/sdb1
umount: only root can unmount /dev/sdb1 from /media/disk
[/code]
Downgrading to util-linux-2.20.1-2 fixed this.

Steps to reproduce:
{The following is supposed to show that:
1) Devices mounted by a normal user with 2.20.1-2 can't be umounted by a normal user with 2.21-5
2) Devices mounted by a normal user with 2.21-5 can't be umounted by a normal user with either 2.20.1-2 or 2.21-5
3) Devices mounted by a normal user with 2.20.1-2 can be umounted by a normal user with 2.20.1-2 }

- In /etc/fstab, add/modify a line similar to this: /dev/sdb1 /media/disk vfat noauto,user,dmask=0000,fmask=0111 0 0
- Install/downgrade to/upgrade to util-linux-2.20.1-2
- From the command line as a normal user, type (as appropriate): mount /dev/sdb1
-- mount should succeed
- upgrade to util-linux-2.21-5
- From the command line as a normal user, type (as appropriate): umount /dev/sdb1
-- umount should fail, requesting root permissions
- umount the device as root
- mount and attempt to umount the device as a normal user
-- umount should fail, requesting root permissions
- Downgrade to util-linux-2.20.1-2
- Attempt to umount the device as a normal user
-- umount should fail, requesting root permissions
- umount the device as root
- mount and attempt to umount the device as a normal user
-- umount should succeed