linux-kernel - Re: [PATCH -next] staging: greybus: fix a missing-check bug in gb_lights_light

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Message-ID: <20200401101622.tj2bhnacetwt5rce@arch-thunder.localdomain>
Date:   Wed, 1 Apr 2020 11:16:22 +0100
From:   Rui Miguel Silva <rmfrfs@...il.com>
To:     Chen Zhou <chenzhou10@...wei.com>
Cc:     johan@...nel.org, elder@...nel.org, gregkh@...uxfoundation.org,
        greybus-dev@...ts.linaro.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] staging: greybus: fix a missing-check bug in
 gb_lights_light_config()

Hi Chen Zhou,
Thanks for the patch.

On Wed, Apr 01, 2020 at 11:00:17AM +0800, Chen Zhou wrote:
> In gb_lights_light_config(), 'light->name' is allocated by kstrndup().
> It returns NULL when fails, add check for it.
> 
> Signed-off-by: Chen Zhou <chenzhou10@...wei.com>

Acked-by: Rui Miguel Silva <rmfrfs@...il.com>

------
Cheers,
     Rui

> ---
>  drivers/staging/greybus/light.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/greybus/light.c b/drivers/staging/greybus/light.c
> index d6ba25f..d2672b6 100644
> --- a/drivers/staging/greybus/light.c
> +++ b/drivers/staging/greybus/light.c
> @@ -1026,7 +1026,8 @@ static int gb_lights_light_config(struct gb_lights *glights, u8 id)
>  
>  	light->channels_count = conf.channel_count;
>  	light->name = kstrndup(conf.name, NAMES_MAX, GFP_KERNEL);
> -
> +	if (!light->name)
> +		return -ENOMEM;
>  	light->channels = kcalloc(light->channels_count,
>  				  sizeof(struct gb_channel), GFP_KERNEL);
>  	if (!light->channels)
> -- 
> 2.7.4
>