Bug#649735: kernel oops on removing an USB floppy drive

[Jonathan Nieder <jrnieder@gmail.com>]

Hi Michal,

Michal Suchanek wrote:

> I guess this is #593304.

That bug was fixed long ago.

> ** Tainted: DO (4224)
>  * Kernel has oopsed before.
>  * Out-of-tree module has been loaded.

Is this reproducible without the virtualbox drivers?  (I assume it is,
but it seems worthwhile to check anyway.)  Please send the first oops
message (it should say "Not tainted"), for example by rebooting with
the virtualbox drivers blacklisted, triggering the problem, and then
attaching full "dmesg" output.

[...]
> usb 8-2: USB disconnect, device number 3
> scsi: killing requests for dead queue
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
> IP: [<ffffffffa0117792>] sd_revalidate_disk+0x33/0x1603 [sd_mod]

Hmm.  There have been some important block layer changes upstream
recently, so please test v3.2-rc1 or later once it hits experimental
(or sooner, if you have the time to build from source).  Then we can
take this upstream.

Thanks much,
Jonathan