USB: legousbtower: fix use-after-free on release
The driver was accessing its struct usb_device in its release() callback without holding a reference. This would lead to a use-after-free whenever the device was disconnected while the character device was still open. Fixes: fef526ca ("USB: legousbtower: remove custom debug macro") Cc: stable <stable@vger.kernel.org> # 3.12 Signed-off-by: NJohan Hovold <johan@kernel.org> Link: https://lore.kernel.org/r/20191009153848.8664-5-johan@kernel.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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