Bug 117188 - [geli] System crashes/reboots on access to file on GELI-encrypted drive.
Summary: [geli] System crashes/reboots on access to file on GELI-encrypted drive.
Status: Closed Overcome By Events
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 6.2-RELEASE
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2007-10-14 18:50 UTC by Volker Ernst
Modified: 2017-08-26 04:07 UTC (History)
1 user (show)

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Description Volker Ernst 2007-10-14 18:50:00 UTC
Hi,

my box is running 6.2-RELEASE, using my own kernel (config-file attached).
It has 2 harddisks (along with 2 CD-drives on 2nd IDE-controller).
Second (300 GB) harddisk is completely used as GELI-encrypted drive.
File-system in use on top of that is UFS2.

Now i have 2 problems/bugs when using this drive for storage:
1) It permanently gets inconsistent (fsck reports errors)
   and looses data (however "only" at a low rate),
   even though its always properly unmounted (umount, geli detach).
2) When accessing _some_ (not all) files on the encrypted drive,
   the machine gets a "segment violation" and reboots 15 sec later.
   Its interesting to see that this behaviour depends on how you
   access the file:
   - It seems to happen only if you "copy/move" the file to a different
     (unencrypted) partition on the system.
   - If you dont "copy" the "critical" file to the unencrypted partition,
     but just read it (i.e. by adding it to an archive on the unencrypted
     partition) - then the machine does _not_ crash.
   When the encrypted disk is mounted at 3am (when system cron-jobs run),
   then the machine sometimes crashes while cron-jobs access files on the
   encrypted drive (however not always).

My GELI-parameters are not standard, maybe thats the problem?
I have included the output of some relevant utilities,
please get http://www.cphone.de/bug.tgz (cant attach tgz-files here).
"geli.txt"  shows what GELI-parameters are used on the encrypted drive.
"dumpfs.txt" shows UFS2 file-system parameters on GELI-encrypted drive.
"fdisk.txt" shows physical disk-parameters for the encrypted drive.
"kernel.conf" is the config-file that was used to build the kernel.
"uname.txt" is the output of "uname -a".

Apart from this the system has no problems, access to other unencrypted
drives etc is ok.

Volker

How-To-Repeat: Attach 300 GB 2nd harddisk to machine running 6.2-RELEASE,
build kernel with attached config-file,
build GELI encrypted 2nd harddisk with attached parameters,
build UFS2 filesystem on top of that,
copy lots of data to the drive.

Do regular checks with "fsck"
--> you should usually see some errors on the file-system
Try "copying" or "moving" many files to different (unencrypted) drive
--> machine should reboot on access to certain files
Watch for spontaneous reboot while running cron-jobs
--> you should sometimes see the machine rebooting
Comment 1 Mark Linimon freebsd_committer freebsd_triage 2007-10-15 05:13:04 UTC
Responsible Changed
From-To: freebsd-i386->freebsd-bugs

This does not sound i386-specific.