[Bug 15806] New: Kernel Panic or Kernel becomes unstable with encrypted drives (TrueCrypt)

[Bug 15806] New: Kernel Panic or Kernel becomes unstable with encrypted drives (TrueCrypt)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15806

           Summary: Kernel Panic or Kernel becomes unstable with encrypted
                    drives (TrueCrypt)
           Product: File System
           Version: 2.5
    Kernel Version: linux kernel 2.6.34-999-generic (Ubuntu mainline
                    Kernel)
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ext4
        AssignedTo: fs_ext4@kernel-bugs.osdl.org
        ReportedBy: no-spam@spamfence.net
        Regression: No


Created an attachment (id=26040)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=26040)
Includes kern.log, linux-image.crash-log and file with system information

* Overview: More detailed restatement of summary.
I have 2 encrypted drives, the Kernel becomes unstable or I get Kernel Panic
when I'm using one of this drives. This means, if I try to copy files from one
encrypted drive to another I get in the most cases Kernel Panic after a short
time. 
If accessing more than one application files from an encrypted drive, I get
often the message that the system might become unstable and I need to reboot
because I can't access the encrypted drive any more. The same when I try to
force a file system check with fsck, I get every time the message that the
system might become unstable. 


* Steps to Reproduce: Minimized, easy-to-follow steps that will trigger the
bug. Include any special setup steps.
The easiest way to reproduce is to check the file system with fsck:
1) Mount the volume with the TrueCrypt GUI (check under "Filesystem: Do not
mount")
2) Force file check with "sudo fsck -f /dev/mapper/truecrypt1"
3) After a short while I get a new icon in the tray with the message "Your
system might become unstable now and might need to be restarted."


* Actual Results: What the application did after performing the above steps.
The Kernel becomes unstable (Your system might become unstable now and might
need to be restarted.) and I can't access the drive until reboot. 


* Expected Results: What the application should have done, were the bug not
present.
fsck should check the mapped drive and should fix errors if any. 


* Build Date & Platform: Date and platform of the build in which you first
encountered the bug.
I'm running Ubuntu 10.04 beta with mainline Kernel. 


* Additional Builds and Platforms: Whether or not the bug takes place on other
platforms (or browsers, if applicable).
The last Kernel without problems was 2.6.28.8 (Ubuntu 9.04), all newer Kernels
crashing my system. 


* Additional Information: Any other useful information.
I'm using TrueCrypt 6.3a, AES Encryption and the drives are formatted with
ext4.

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[Bug 15806] Kernel Panic or Kernel becomes unstable with encrypted drives (TrueCrypt)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15806


Eric Sandeen <sandeen@redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sandeen@redhat.com




--- Comment #1 from Eric Sandeen <sandeen@redhat.com>  2010-04-19 15:19:40 ---
I don't see anything in the oops that looks at all ext4-specific - unless you
can show otherwise, I'm guessing that this is a bug in another layer...

If this is triggered by doing userspace IO on the block device (i.e. via fsck)
that's another clue that it's a problem in the (crypted) block layer rather
than the filesystem, I think.

-Eric

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[Bug 15806] Kernel Panic or Kernel becomes unstable with encrypted drives (TrueCrypt)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15806


Andrew Morton <akpm@linux-foundation.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |akpm@linux-foundation.org
          Component|ext4                        |LVM2/DM
         AssignedTo|fs_ext4@kernel-bugs.osdl.or |mbroz@redhat.com
                   |g                           |
            Product|File System                 |IO/Storage




--- Comment #2 from Andrew Morton <akpm@linux-foundation.org>  2010-04-19 22:25:11 ---
yeah, I'll recategorise it to devicemapper, assigned to Milan.

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