Re: [PATCH v2] xen/blkfront: avoid NULL blkfront_info dereference on device removal

[Vasilis Liaskovitis]

On Mon, 2018-10-15 at 16:02 +0200, Roger Pau Monnà wrote:
> 
> > This results in a NULL pointer BUG when blkfront_remove and
> > blkif_free
> > try to access the failing device's NULL struct blkfront_info.
> > 
> > 
> I guess this is a candidate for backporting?
> 

yes, I think so. At least for kernels >=4.5, which could face this
issue due to commit c31ecf6c12 (this frees the struct blkinfo in the
failing path of talk_to_blkback).

thanks, 

- Vasilis