Re: [Qemu-devel] New assertion failed for USB

[Erik Rull]

On March 7, 2012 at 12:30 PM Gerd Hoffmann <address@hidden> wrote:

> On 03/07/12 10:46, Erik Rull wrote:
> >  Hi Gerd,
> >
> > there are new assertion failed when plugging in a USB security dongle
at
> > guest runtime.
> > They occur on the current GIT master  + your async patch.
> >
> > /home/erik/qemu/hw/usb.c:352 usb_packet_complete: Assertion
> > '((&ep->queue)->tqh_first) == p' failed.
> > I got this only once and I'm currently not able to reproduce that.
>
> Strange.
>
> > Next one is:
> > Same security dongle (I tested two different hardware versions, both
show
> > the same behaviour):
> > - They get detected at runtime (beside this one crash above) but it
takes
> > quite long
> > - When being plugged in before guest startup I get the following
assertion
> > - this seems to happen in BIOS before the guest OS actually boots:
> > /home/erik/qemu/hw/usb-uhci.c:967: uhci_fill_queue: Assertion 'ret ==
2'
> > failed.
>
> Might be related.  In both cases the packet queue somehow isn't in the
> state we expecting it to be.
>
> > If you need further information, just let me know how to produce it.
>
> Enable tracing for these events ...
>
> usb_packet_state_change
> usb_host_req_*
> usb_host_urb_*
>
> ... and try to reproduce.  Hopefully that gives a clue.
>
> cheers,
>   Gerd


Hi Gerd,

thanks for the quick reply.

File is attached.

Best regards,

Erik

usb-trace-assert.txt
Description: Text document