linux-kernel - Re: [PATCH] serial: 8250: Check for valid console index

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Message-ID: <ZR59CTEOdGYS+8lE@smile.fi.intel.com>
Date:   Thu, 5 Oct 2023 12:08:25 +0300
From:   Andy Shevchenko <andriy.shevchenko@...el.com>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>, Dhruva Gole <d-gole@...com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        John Ogness <john.ogness@...utronix.de>,
        Johan Hovold <johan@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH] serial: 8250: Check for valid console index

On Wed, Oct 04, 2023 at 11:55:10AM +0300, Tony Lindgren wrote:
> Let's not allow negative numbers for console index.

...

> -	if (co->index >= UART_NR)
> +	if (co->index < 0 || co->index >= UART_NR)
>  		co->index = 0;

in_range() ?

-- 
With Best Regards,
Andy Shevchenko