linux-kernel - RE: [PATCH v3 2/4] tty: n_gsm: add keep alive support

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Message-ID: <DB9PR10MB5881A1920E49A1B03E64C5CBE0DA9@DB9PR10MB5881.EURPRD10.PROD.OUTLOOK.COM>
Date:   Mon, 6 Feb 2023 10:32:06 +0000
From:   "Starke, Daniel" <daniel.starke@...mens.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "jirislaby@...nel.org" <jirislaby@...nel.org>,
        "ilpo.jarvinen@...ux.intel.com" <ilpo.jarvinen@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v3 2/4] tty: n_gsm: add keep alive support

> > +static int gsm_config_ext(struct gsm_mux *gsm, struct gsm_config_ext *ce)
> > +{
> > +	unsigned int i;
> > +
> > +	gsm->keep_alive = ce->keep_alive;
> > +	/*
> > +	 * Check that userspace doesn't put stuff in here to prevent breakages
> > +	 * in the future.
> > +	 */
> > +	for (i = 0; i < ARRAY_SIZE(ce->reserved); i++)
> > +		if (ce->reserved[i])
> > +			return -EINVAL;
> 
> Do the check before you save off the keep_alive variable?

Thank you for this hint!
I will change this and send a new version of this patch series.

Best regards,
Daniel Starke