Stack dump when running ddrescue with this disk as source:
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

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https://bugs.launchpad.net/bugs/1154739

Title:
  xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep
  eab59c8c

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