linux-kernel - Re: [PATCH] staging: bcm2835: Fix a memory leak in error handling path

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Date:   Fri, 24 Feb 2017 13:37:30 +0100
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        mchehab@...nel.org, gregkh@...uxfoundation.org,
        f.fainelli@...il.com, rjui@...adcom.com, sbranden@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com, swarren@...dotorg.org,
        lee@...nel.org, eric@...olt.net, arnd@...db.de
Cc:     devel@...verdev.osuosl.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: Re: [PATCH] staging: bcm2835: Fix a memory leak in error handling
 path

Hi Christophe,

Am 19.02.2017 um 11:34 schrieb Christophe JAILLET:
> If 'kzalloc()' fails, we should release resources allocated so far, just as
> done in all other cases in this function.
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
> Not sure that the error handling path is correct.
> Is 'gdev[0]' freed? Should it be?

sorry, didn't checked your patch yet. Currently there are 3 bcm2835 
drivers in staging (vchiq, camera, audio). So please resend with a more 
distinct subject.

Thanks
Stefan

> ---
>   drivers/staging/media/platform/bcm2835/bcm2835-camera.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/media/platform/bcm2835/bcm2835-camera.c b/drivers/staging/media/platform/bcm2835/bcm2835-camera.c
> index ca15a698e018..9651b9bc3439 100644
> --- a/drivers/staging/media/platform/bcm2835/bcm2835-camera.c
> +++ b/drivers/staging/media/platform/bcm2835/bcm2835-camera.c
> @@ -1914,8 +1914,10 @@ static int __init bm2835_mmal_init(void)
>   
>   	for (camera = 0; camera < num_cameras; camera++) {
>   		dev = kzalloc(sizeof(struct bm2835_mmal_dev), GFP_KERNEL);
> -		if (!dev)
> -			return -ENOMEM;
> +		if (!dev) {
> +			ret = -ENOMEM;
> +			goto free_dev;
> +		}
>   
>   		dev->camera_num = camera;
>   		dev->max_width = resolutions[camera][0];