Public bug reported:

I downloaded the Intrepid Alternate Install CD daily image (2008-09-01)
and I booted a machine to perform a clean install after re-partitioning
the disks and doing some testing/experimenting.

Unusual things happened when I unloaded the module sd-mod (modprobe -r
sd-mod): the disks powered down -- but I guess this was ok. Then, when I
reloaded the module (modprobe sd-mod), I got some oopses and a kernel
panic. The bug was reproducible after a reboot, and I saved the syslog.

Steps to reproduce:
* Boot from the Intrepid Alternate Install CD 
* At partman's stage, Go Back and then switch to a console/open a shell
* modprobe -v -r sd-mod:
  rmmod /lib/modules/2.6.27-2-generic/kernel/drivers/scsi/sd_mod.ko
  rmmod /lib/modules/2.6.27-2-generic/kernel/lib/crc-t10dif.ko

The usual noise made by the disk(s) powering down will be heard.

* modprobe -v sd-mod
  insmod /lib/modules/2.6.27-2-generic/kernel/lib/crc-t10dif.ko
  insmod /lib/modules/2.6.27-2-generic/kernel/drivers/scsi/sd_mod.ko

The kernel will print "kobject (f736d29c): tried to init an initialized
object, something is seriously wrong." and a stack trace. Possibly, it
will produce an oops and panic.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: kernel-oops linux-2.6.27 panic

-- 
kobject: tried to init an uninitialized object when removing and re-inserting 
sd-mod
https://bugs.launchpad.net/bugs/263746
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