linux-kernel - Re: [v4l-dvb-maintainer] [PATCH] V4L/DVB: potential leak in dvb-bt8xx

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Date:	Sun, 15 Oct 2006 20:35:37 +0400
From:	Manu Abraham <abraham.manu@...il.com>
To:	Florin Malita <fmalita@...il.com>
CC:	Trent Piepho <xyzzy@...akeasy.org>,
	v4l-dvb maintainer list <v4l-dvb-maintainer@...uxtv.org>,
	linux-kernel@...r.kernel.org,
	Mauro Carvalho Chehab <mchehab@...radead.org>
Subject: Re: [v4l-dvb-maintainer] [PATCH] V4L/DVB: potential leak in dvb-bt8xx

Florin Malita wrote:
> Trent Piepho wrote:
>> I believe that 'state' will be kfree'd by the dst_attach() function if there
>> is a failure.  Not what you would expect, to have it allocated in the bt8xx
>> driver (why do is there??) and freed on error in a different function.
>>   
> 
> Hm, you're right - it is kfreed in dst_attach(). But we're still missing
> the kmalloc result check...
> 
> Signed-off-by: Florin Malita <fmalita@...il.com>
> ---
> 
>  dvb-bt8xx.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/media/dvb/bt8xx/dvb-bt8xx.c b/drivers/media/dvb/bt8xx/dvb-bt8xx.c
> index fb6c4cc..d22ba4e 100644
> --- a/drivers/media/dvb/bt8xx/dvb-bt8xx.c
> +++ b/drivers/media/dvb/bt8xx/dvb-bt8xx.c
> @@ -665,6 +665,9 @@ static void frontend_init(struct dvb_bt8
>  	case BTTV_BOARD_TWINHAN_DST:
>  		/*	DST is not a frontend driver !!!		*/
>  		state = (struct dst_state *) kmalloc(sizeof (struct dst_state), GFP_KERNEL);
> +		if (!state)
> +			break;
> +
>  		/*	Setup the Card					*/
>  		state->config = &dst_config;
>  		state->i2c = card->i2c_adapter;
> 



This patch was applied a few days back

Manu
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