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SubjectRe: [PATCH v2] xen-blkfront: fix kernel panic with blkfront_remove()
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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@vger.kernel.org
> Signed-off-by: Manjunath Patil <manjunath.b.patil@oracle.com>

Commit f92898e7f32e3 already added that.


Juergen

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