staging: dgrp: dgrp_tty.c: Audit the return values of get/put_user()
fix for missing audits for return values of get_user() and put_user(). Inspecting the return values of get/put_user() would make the access_ok() redundant, hence removing calls to access_ok() in such scenarios. Signed-off-by: NKumar Amit Mehta <gmate.amit@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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