Bug#411546: linux-image-2.6.18-4-686: NULL pointer exception when running hdparm -U

[Moritz Muehlenhoff <jmm@inutil.org>]

On Mon, Feb 19, 2007 at 07:56:14PM +0100, Martin Waitz wrote:
> Package: linux-image-2.6.18-4-686
> Version: 2.6.18.dfsg.1-10
> Severity: normal
> 
> hoi :)
> 
> I just tried to unplug my CDROM drive on a Dell Latitude D600 laptop and
> run 'hdparm -U 1 /dev/hdc' to unregister it from the kernel.
> 
> It seamed to work in that the kernel does not know about hdc any more,
> but it printed a nice little backtrace:
> 
> BUG: unable to handle kernel NULL pointer dereference at virtual address 0000011c
>  printing eip:

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