[dm-devel] [BUG REPORT] Kernel panic on 3.9.0-rc7-4-gbb33db7

[Jens Axboe]

On Thu, Apr 18 2013, Tejun Heo wrote:
> Hello,
> 
> On Thu, Apr 18, 2013 at 09:08:34AM -0700, Linus Torvalds wrote:
> > On Thu, Apr 18, 2013 at 7:30 AM, Jens Axboe <axboe at kernel.dk> wrote:
> > >
> > > Could you capture the full dump? I'd like to see what rcx was, and that
> > > seems to have scrolled off.
> > 
> > You don't need it. The %cr2 value shows the address of the bad access,
> > and it's 0x00000001.
> 
> If I'm not mistaken, it seems like we have a bio which has 1 as its
> ->bi_bdev.  Ummm.... no idea whatsoever how that can happen tho right
> now.  Looking into it.

Yep, thanks Linus for that hint... Must be someone abusing it for a
flag field post submission? Crazy.

-- 
Jens Axboe