Hi,
Under specific circumstances, hci_uart_tx_wakeup() seems to call
tty->driver->write() without checking if the tty is alive, which
effectively causes a nasty panic in uart_write(). From what I've read so
far it seems that hci_ldisc.c is to blame, so I'm reporting it here.
This is related to:
http://sourceforge.net/mailarchive/message.php?msg_id=14724441
See also:
http://bugme.osdl.org/show_bug.cgi?id=6131
http://bugzilla.kernel.org/show_bug.cgi?id=5958
Best regards,
--
Karol 'sziwan' Kozimor
[email protected]
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Hi Russell,
> > Under specific circumstances, hci_uart_tx_wakeup() seems to call
> > tty->driver->write() without checking if the tty is alive, which
> > effectively causes a nasty panic in uart_write(). From what I've read so
> > far it seems that hci_ldisc.c is to blame, so I'm reporting it here.
> >
> > This is related to:
> > http://sourceforge.net/mailarchive/message.php?msg_id=14724441
> >
> > See also:
> > http://bugme.osdl.org/show_bug.cgi?id=6131
> > http://bugzilla.kernel.org/show_bug.cgi?id=5958
>
> As a priority, I especially recommend bluetooth developers read:
>
> http://bugzilla.kernel.org/show_bug.cgi?id=5958#c2
>
> where bug 6131 was predicted.
I saw that we didn't implement the hangup callback. Will it be
sufficient to use it to shutdown our HCI interface?
Regards
Marcel
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On Sun, Feb 26, 2006 at 03:59:35PM +0100, Karol Kozimor wrote:
> Hi,
> Under specific circumstances, hci_uart_tx_wakeup() seems to call
> tty->driver->write() without checking if the tty is alive, which
> effectively causes a nasty panic in uart_write(). From what I've read so
> far it seems that hci_ldisc.c is to blame, so I'm reporting it here.
>
> This is related to:
> http://sourceforge.net/mailarchive/message.php?msg_id=14724441
>
> See also:
> http://bugme.osdl.org/show_bug.cgi?id=6131
> http://bugzilla.kernel.org/show_bug.cgi?id=5958
As a priority, I especially recommend bluetooth developers read:
http://bugzilla.kernel.org/show_bug.cgi?id=5958#c2
where bug 6131 was predicted.
--
Russell King
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Hi Karol,
> Under specific circumstances, hci_uart_tx_wakeup() seems to call
> tty->driver->write() without checking if the tty is alive, which
> effectively causes a nasty panic in uart_write(). From what I've read so
> far it seems that hci_ldisc.c is to blame, so I'm reporting it here.
and I haven't seen a patch for it or any advice on how to fix this. At
the moment I have no time to fully track this down.
Regards
Marcel
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