Date: Thu, 18 Mar 2004 17:12:28 -0800
From: Greg KH <greg@kroah.com>
To: Jakub Bogusz <qboosh@pld-linux.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.4: Oops on rmmod uhci-hcd when device is still accessed
Message-ID: <20040319011228.GF19053@kroah.com>
References: <20040317232203.GA3510@satan.blackhosts>
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On Thu, Mar 18, 2004 at 12:22:03AM +0100, Jakub Bogusz wrote:
> It's in drivers/usb/core/devio.c:388:
> 
> |        down(&dev->serialize);
> |        if (test_and_clear_bit(intf, &ps->ifclaimed)) {
> |                iface = dev->actconfig->interface[intf];
>                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> |                usb_driver_release_interface(&usbdevfs_driver, iface);
> |                err = 0;
> |        }
> |        up(&dev->serialize);
> 
> and looks like dev->actconfig is NULL

Yeah, there's a lot of nasty race conditions with usbfs that have been
around for ages.  I think someone on the linux-usb-devel mailing list
has been working on fixing them all up and has a patch set you might be
able to test.

Hope this helps,

greg k-h
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