From f14ea824e4ccd1c3cddcf108935f7ab219beb693 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Tue, 3 Jan 2017 16:39:52 +0100
Subject: [PATCH] USB: serial: mos7720: fix parport use-after-free on probe
 errors

commit 75dd211e773afcbc264677b0749d1cf7d937ab2d upstream.

Do not submit the interrupt URB until after the parport has been
successfully registered to avoid another use-after-free in the
completion handler when accessing the freed parport private data in case
of a racing completion.

Fixes: b69578df7e98 ("USB: usbserial: mos7720: add support for parallel
port on moschip 7715")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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