mount: could not find any free loop device

[Tom Horsley]

On Wed, 27 Jun 2007 01:14:12 +0200
"Andras Simon" <szajmi at gmail.com> wrote:

> The problem is that there shouldn't be any loop devices in use and
> there's nothing to unmount. The following transcript demonstrates the
> problem:
> 
> [root at localhost ~]# losetup -a
> [root at localhost ~]# mount -o loop,offset=32256
> /usr/local/kvm-images/WinXP.raw /mnt/
> [root at localhost ~]# umount /mnt/
> [root at localhost ~]# losetup -a
> /dev/loop0: [080c]:14073859 (/usr/local/kvm-images/WinXP.raw), offset 32256

That looks like a pretty clear bug in umount to me. I'd suggest
turning in a bugzilla on it. (I wonder if it only happens with
the offset arg - you'd think people would have noticed a general
leak of loop devices before now considering how few of them
are available by default).