netdev - Re: [PATCH net-next] sweep the floors and convert some .get

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Message-ID: <4EB85839.8090503@hp.com>
Date:	Mon, 07 Nov 2011 14:14:17 -0800
From:	Rick Jones <rick.jones2@...com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	Rick Jones <raj@...dy.cup.hp.com>, netdev@...r.kernel.org,
	David Dillow <dave@...dillows.org>,
	Steffen Klassert <klassert@...hematik.tu-chemnitz.de>,
	Ion Badulescu <ionut@...ula.org>,
	Jay Cliburn <jcliburn@...il.com>,
	Chris Snook <chris.snook@...il.com>,
	Michael Chan <mchan@...adcom.com>,
	Eilon Greenstein <eilong@...adcom.com>,
	Matt Carlson <mcarlson@...adcom.com>,
	Rasesh Mody <rmody@...cade.com>,
	Grant Grundler <grundler@...isc-linux.org>,
	Ajit Khaparde <ajit.khaparde@...lex.com>,
	Lennert Buytenhek <buytenh@...tstofly.org>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Tim Hockin <thockin@...kin.org>, Jon Mason <jdmason@...zu.us>,
	Sony Chacko <sony.chacko@...gic.com>,
	Anirban Chakraborty <anirban.chakraborty@...gic.com>,
	Francois Romieu <romieu@...zoreil.com>,
	Steve Glendinning <steve.glendinning@...c.com>
Subject: Re: [PATCH net-next] sweep the floors and convert some .get_drvinfo
 routines to strlcpy

On 11/07/2011 02:11 PM, Ben Hutchings wrote:
> On Mon, 2011-11-07 at 13:56 -0800, Rick Jones wrote:
>> From: Rick Jones<rick.jones2@...com>
>>
>> Per the mention made by Ben Hutchings that strlcpy is now the preferred
>> string copy routine for a .get_drvinfo routine, do a bit of floor
>> sweeping and convert some of the as-yet unconverted ethernet drivers to
>> it.
> [...]
>> diff --git a/drivers/net/ethernet/3com/3c589_cs.c b/drivers/net/ethernet/3com/3c589_cs.c
>> index 972f80e..5e91602 100644
>> --- a/drivers/net/ethernet/3com/3c589_cs.c
>> +++ b/drivers/net/ethernet/3com/3c589_cs.c
>> @@ -468,9 +468,10 @@ static void tc589_reset(struct net_device *dev)
>>   static void netdev_get_drvinfo(struct net_device *dev,
>>   			       struct ethtool_drvinfo *info)
>>   {
>> -	strcpy(info->driver, DRV_NAME);
>> -	strcpy(info->version, DRV_VERSION);
>> -	sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
>> +	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
>> +	strlcpy(info->version, DRV_VERSION, sizeof(info->version));
>> +	snprintf(info->bus_info, sizeof(info->bus_info) - 1,
>> +		"PCMCIA 0x%lx", dev->base_addr);
> [...]
>
> snprintf(), like strlcpy(), will always write a null terminator in the
> buffer it is given (unless the buffer size is 0).  Therefore it is
> incorrect to subtract 1 from the actual buffer size.

I will fix those and resend.  Thanks.

rick jones
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