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

oops! sorry for not noticing this.


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.


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