This is a cut and paste bug.  We intended to free ->del_var and
->new_var but we only free ->new_var.
Signed-off-by: NDan Carpenter <error27@gmail.com>
Acked-by: NMike Waychison <mikew@google.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>