Date: Wed, 13 Feb 2008 00:59:41 -0600 (CST) From: Scott Bennett <bennett@cs.niu.edu> To: rsmith@xs4all.nl Cc: freebsd-questions@freebsd.org Subject: Re: /bin/csh script in GELI partition crashes 6.3-STABLE Message-ID: <200802130659.m1D6xffv015672@mp.cs.niu.edu>
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On Tue, 12 Feb 2008 23:51:41 +0100 Roland Smith <rsmith@xs4all.nl>
wrote:
>On Tue, Feb 12, 2008 at 03:46:56PM -0600, Scott Bennett wrote:
>> On Tue, 12 Feb 2008 16:01:26 +0100 Roland Smith <rsmith@xs4all.nl>
>> wrote:
>> >On Tue, Feb 12, 2008 at 08:02:49AM -0600, Scott Bennett wrote:
>> >> I just set up a GELI partition for the first time a while ago (not
>> >> counting the swap partition). After initializing the GELI device file,
>> >> filling it from /dev/random, running newfs, and copying over a couple =
>of
>> >> directory trees from another file system, I tried running a C-shell sc=
>ript
>> >> in one of the bottom-level directories. The script works fine in its
>> >> original location, but after cd'ing to the new location and running it,
>> >> the system immediately reboots. Because this leaves most/all of the f=
>ile
>> >> systems marked dirty, fsck has to run on startup. (I ran fsck by hand=
> on
>> >> the GELI partition.)
>> >> It does it every time, so it is certainly repeatable. Is this a
>> >> known problem? Or is there some feature of GELI-encrypted file systems
>> >> that is expected to have problems running scripts?=3D20
>> >
>> >My /home is a GELI encrypted partition. I've never had problems running
>> >scripts from it, although my scripts are usually sh, not csh.
>> >
>> >What does the script do? Are you running it as root?
>> >
>> The script displays a bunch of pictures as separate xv(1) windows. =
>No,
>> I was running it under my own userid. It is quite simple:
>>=20
>> % cat show
>> #! /bin/csh
>> set delay=3D2
>> set pixlist=3D(09 08 07 05 04 03 02 01)
>> foreach i ($pixlist)
>> (nice xv $i.jpg &)
>> sleep $delay
>> end
>>=20
>> The delay is simply to ensure the windows get opened in the sequence that
>> I want them opened. The photos are in the same directory, and I run it by
>> typing "./show" in the directory. If I type, for example, "xv 01.jpg&", =
>it
>> works fine in either the old location or in the GELI partition. If I type
>> "./show" in the copy of the directory that is in the GELI partition, Free=
>BSD
>> reboots immediately.=20
>
>I've run your script on a batch of photos on a GELI encrypted partition
>without problems. This is on FreeBSD 7.0-PRERELEASE amd64
>
>I would look at the X server. Since it runs as root and has access to
>/dev/mem and /dev/io an X bug could potentially screw things up quite nicel=
>y.
>I'm running xorg-server-1.4_4,1.
I'm still running xorg-server-6.9.0_5, I believe. Haven't yet felt like
wading through the swamp of troubles that seems to await those who upgrade
to 7.x, but will probably have to suffer through it soon.
>
>If you have it installed, try display(1) from the ImageMagick suite
>instead of xv. See if it makes any difference.
There's a thought. However, I think first I'll try setting the GELI
sector size to 4 KB to see whether that evades the bug.
>
>I presume you've checked for the obvious things such as out of memory or
>filesystem full?
What do you mean "out of memory"? And I only had the file system loaded
to about 45% after minfree.
>
>> Maybe I should try GBDE instead of GELI. I chose GELI for the=20
>> partition in question mainly because I was already using it for the swap
>> partition, but maybe it's still a little too green to be reliable yet.
>=20
>I've used it on my /home for years without trouble.
>
>=46rom what I've read, GELI is supposed to be more secure.
>
Well, if I can get it to work and not cause instant reboots, I'll stick
with it. Otherwise I'll have to play around with what works.
Scott Bennett, Comm. ASMELG, CFIAG
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