AppArmor: fix oops in apparmor_setprocattr

When invalid parameters are passed to apparmor_setprocattr a NULL deref
oops occurs when it tries to record an audit message. This is because
it is passing NULL for the profile parameter for aa_audit. But aa_audit
now requires that the profile passed is not NULL.

Fix this by passing the current profile on the task that is trying to
setprocattr.

Signed-off-by: Kees Cook <kees@ubuntu.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Cc: stable@kernel.org
Signed-off-by: James Morris <jmorris@namei.org>
static int param_set_aabool(const char *val, const struct kernel_param *kp)
{
	if (!capable(CAP_MAC_ADMIN))
		return -EPERM;
	return param_set_bool(val, kp);
}

static int param_set_aabool(const char *val, const struct kernel_param *kp)
{
	if (!capable(CAP_MAC_ADMIN))
		return -EPERM;
	return param_set_bool(val, kp);
}
