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

[Michal Suchanek <michal.suchanek@ruk.cuni.cz>]

Excerpts from Jonathan Nieder's message of Wed Nov 23 23:54:43 +0100 2011:
> 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.

With linux 3.2-rc3 and no virtualbox drivers I cannot reproduce this
issue. 

Thanks

Michal