linux-kernel - Re: [RESEND][PATCH 4/4] NFC: fdp: Fix possible buffer overflow in WCS4000 NFC driver

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Message-ID: <1524228089.21176.469.camel@linux.intel.com>
Date:   Fri, 20 Apr 2018 15:41:29 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Amit Pundir <amit.pundir@...aro.org>,
        lkml <linux-kernel@...r.kernel.org>,
        linux-wireless@...r.kernel.org
Cc:     Samuel Ortiz <sameo@...ux.intel.com>,
        Christophe Ricard <christophe.ricard@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        John Stultz <john.stultz@...aro.org>,
        Dmitry Shmidt <dimitrysh@...gle.com>,
        Todd Kjos <tkjos@...gle.com>,
        Android Kernel Team <kernel-team@...roid.com>,
        Suren Baghdasaryan <surenb@...gle.com>
Subject: Re: [RESEND][PATCH 4/4] NFC: fdp: Fix possible buffer overflow in
 WCS4000 NFC driver

On Wed, 2018-04-18 at 15:35 +0530, Amit Pundir wrote:

> +			if (phy->next_read_size >
> FDP_NCI_I2C_MAX_PAYLOAD) {

> +				dev_dbg(&client->dev, "%s: corrupted
> packet\n",
> +					__func__);

If Android people would follow the kernel in reasonable time they may
have noticed Dynamic Debug functionality and how it works.

In this case the __func__ is superfluous.

> +				phy->next_read_size = 5;
> +				goto flush;
> +			}
>  		} else {
>  			phy->next_read_size =
> FDP_NCI_I2C_MIN_PAYLOAD;
>  

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy