In reference to this email: http://www.spinics.net/lists/linux-usb/msg78711.html I have exactly the same stack dump with different words, null pointer dereference. Plugging a USB3 external disk and using ddrescue will cause this stack dump: http://postimg.org/image/70fi6f39n/ Hand typed panic follows: Null pointer dereference at 0x00000000 CPU: 1, PID: 0, Comm: swapper/1 RIP: xhci_stream_id_to_ring Call Trace: handle_set_deq_completion.isra ? handle_stopped_cmd_ring handle_cmd_completion xhci_handle_event xhci_irq xhci_msi_irq handle_irq_event_percpu handle_irq_event handle_edge_irq handle_irq do_IRQ common_interrupt <EOI> cpuidle_enter_state cpuidle_enter_state cpuidle_idle_call arch_cpu_idle cpu_idle_loop cpu_startup_entry start_secondary CR2: 0x28 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
