We missed to create and copy the shadow into userspace in case a
preexisting semaphore was opened in process that didn't created it. Was
biting us in pshared setups, but also when the previous owner died
before destroying a named semaphore.
Reported-by: Paal Tamas <firstname.lastname@example.org>
Signed-off-by: Jan Kiszka <email@example.com>