Re: [Xen-devel] [PATCH v2] xen-blkfront: fix kernel panic with blkfront_remove()

[Manjunath Patil]

oops! sorry for not noticing this.

-Manjunath

On 11/8/2018 10:16 PM, Juergen Gross wrote:
> On 09/11/2018 02:10, Manjunath Patil wrote:
> > When we try to detach the device, blkfront_remove() tries to access
> > blkfront_info leading to kernel panic.
> >
> > Typical call stack involving panic -
> >   #10 page_fault at ffffffff816f25df
> >       [exception RIP: blkif_free+46]
> >   #11 blkfront_remove at ffffffffa004de47 [xen_blkfront]
> >   #12 xenbus_dev_remove at ffffffff813faa4c
> >   #13 __device_release_driver at ffffffff814769aa
> >   #14 device_release_driver at ffffffff81476a63
> >   #15 bus_remove_device at ffffffff814762eb
> >   #16 device_del at ffffffff81472684
> >   #17 device_unregister at ffffffff814727e2
> >   #18 xenbus_dev_changed at ffffffff813fa89f
> >   #19 frontend_changed at ffffffff813fca19
> >   #20 xenwatch_thread at ffffffff813f88f9
> >   #21 kthread at ffffffff810a486b
> >   #22 ret_from_fork at ffffffff816ed2a8
> >
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Manjunath Patil <manjunath.b.patil@xxxxxxxxxx>
> Commit f92898e7f32e3 already added that.
>
>
> Juergen