Bug#461762: linux-image-2.6.18-5-sparc64: Kernel unaligned access at TPC[45dc6c] handle_futex_death+0x20/0x90

[Moritz Muehlenhoff <jmm@inutil.org>]

On Sun, Jan 20, 2008 at 05:30:51PM +0100, Gregory Colpart wrote:
> Package: linux-image-2.6.18-5-sparc64
> Version: 2.6.18.dfsg.1-17
> Severity: minor
> 
> Hi,
> 
> I have Sun Ultra5 running Etch. Sometimes, I see kernel message like:
> Kernel unaligned access at TPC[45dc5c] handle_futex_death+0x20/0x90
> 
> For example, I reboot today in 2.6.18-5-sparc64:
> 
> --8<--
> ultra5:~# tail /var/log/kern.log
> Jan 20 16:01:56 ultra5 kernel: device-mapper: ioctl: 4.7.0-ioctl (2006-06-24) initialised: dm-devel@redhat.com
> Jan 20 16:01:56 ultra5 kernel: kjournald starting.  Commit interval 5 seconds
> Jan 20 16:01:56 ultra5 kernel: EXT3 FS on hda1, internal journal
> Jan 20 16:01:56 ultra5 kernel: EXT3-fs: mounted filesystem with ordered data mode.
> Jan 20 16:01:56 ultra5 kernel: eth0: Link is up using internal transceiver at 100Mb/s, Full Duplex.
> Jan 20 16:21:10 ultra5 kernel: Kernel unaligned access at TPC[45dc6c] handle_futex_death+0x20/0x90
> Jan 20 16:21:41 ultra5 last message repeated 2 times
> Jan 20 16:21:44 ultra5 last message repeated 2 times
> Jan 20 16:24:08 ultra5 kernel: Kernel unaligned access at TPC[45dc6c] handle_futex_death+0x20/0x90
> Jan 20 16:24:08 ultra5 kernel: Kernel unaligned access at TPC[45dc6c] handle_futex_death+0x20/0x90
> --8<--
> 
> Severity is minor because I haven't noticed anything 
> being affected by this message.

Does this error still occur with more recent kernel versions?

If you're running Etch, could you try to reproduce this bug
with the 2.6.24 based kernel added in 4.0r4?
http://packages.qa.debian.org/l/linux-2.6.24.html

Cheers,
        Moritz