Re: crypto loop bug

From: Walter Hofmann (walter.hofmann@physik.stud.uni-erlangen.de)
Date: Sun Jul 30 2000 - 14:11:29 EST


On Sun, 30 Jul 2000, Ragnar Hojland Espinosa wrote:

> Actually the bug is the opposite :) ...

I don't think so.

> > frodo:/home/wh # /usr/local/bin/losetup -e serpent /dev/loop0 /usr/local/loop/wh
> > Password : correct password
> > frodo:/home/wh # /sbin/e2fsck /dev/loop0
> > e2fsck 1.18, 11-Nov-1999 for EXT2 FS 0.5b, 95/08/09
> > Group descriptors look bad... trying backup blocks...
> > /sbin/e2fsck: Bad magic number in super-block while trying to open /dev/loop0
> > frodo:/home/wh # mount /dev/loop0 /mnt
> > frodo:/home/wh # umount /mnt
> > frodo:/home/wh # /sbin/e2fsck /dev/loop0
> > e2fsck 1.18, 11-Nov-1999 for EXT2 FS 0.5b, 95/08/09
> > /dev/loop0: clean, 4650/81920 files, 66139/163840 blocks
>
> Since you have already set up the loop device with the right password, the
> first fsck shouldn't fail.

I previously set it up with the wrong password (you didn't quote these
commands). Then I deleted it. But after setting it up with the right
password the old data is still there (or so it seems).

> And since umount doesn't automagically losetup
> -d /dev/loop0, it should not invalidate it's settings (password in this
> case)

It seems that it is the mount command that invalidates the old pages as
mount works correctly and I can access the filesystem after mounting
(without errors), although fsck failed.

Walter

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