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
