Messages in this thread | | | Date | Wed, 20 Dec 2006 10:10:26 -0500 (EST) | From | Alan Stern <> | Subject | Re: [linux-usb-devel] Possible race condition in usb-serial.c |
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On Wed, 20 Dec 2006, Oliver Neukum wrote:
> The data structure to protect is serial_table. Everything else is > protected by refcounts. Therefore the interesting race is between > open and disconnect. Open is called with BKL (fs/char_dev.c::chrdev_open) > > Now, regarding disconnect. It used to be called with BKL held. I haven't been > able to verify that this is still the case. If not, then there's a race. > > In addition usb_serial_probe() uses get_free_serial() early in the process > before the device is ready. Without BKL, this too, races with open. > > People, do we take BKL in khubd?
Nope.
Alan Stern
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