Re: [RFC PATCH] virtio_blk: Checking "private_data" to avoid kernelpanic when hotplugging

[Ren Mingxin]

 On 04/11/2012 04:36 PM, Michael S. Tsirkin wrote:
> On Wed, Apr 11, 2012 at 11:17:16AM +0800, Ren Mingxin wrote:
> >   On 04/09/2012 03:53 PM, Michael S. Tsirkin wrote:
> >
> > > There's a chance you are hitting a race fixed by
> > > 4678d6f970c2f7c0cbfefc0cc666432d153b321b.
> > >
> > > If it's still not fixed it might make sense to enable slab debugging -
> > > we might have a use after free here.
> > I don't think the below commit has fixed this panic issue, for it is
> > included
> > in my last test environment(3.3-rc7).
> > 4678d6f970c2f7c0cbfefc0cc666432d153b321b
> >
> > Now, I'd find which commit makes sense.
> Great, thanks very much. I do suggest slab debugging if
> the race reproduces for you with it enabled - reducing
> the chance random struct rearrangements hide the bug.

Much appreciated for suggesting :-)
I'll try it to locate the commit and backport it into rhel.

--
Thanks,
Ren

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