usb: check USB configuration descriptor object
When processing remote NDIS control message packets, the USB Net device emulator checks to see if the USB configuration descriptor object is of RNDIS type(2). But it does not check if it is null, which leads to a null dereference error. Add check to avoid it. Reported-by: NQinghao Tang <luodalongde@gmail.com> Signed-off-by: NPrasad J Pandit <pjp@fedoraproject.org> Message-id: 1455188480-14688-1-git-send-email-ppandit@redhat.com Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
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