linux-kernel - Re: [PATCH] extcon: cros-ec: Fix a potential NULL pointer dereference

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Date:   Mon, 07 Aug 2017 15:41:03 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        myungjoo.ham@...sung.com
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] extcon: cros-ec: Fix a potential NULL pointer
 dereference

Hi,

On 2017년 08월 07일 15:30, Christophe JAILLET wrote:
> Return -ENOMEM in case of memory allocation failure. This avoids a NULL
> pointer dereference.
> 
> Fixes: c69831666109 ("extcon: cros-ec: Add extcon-cros-ec driver to support display out")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
>  drivers/extcon/extcon-usbc-cros-ec.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/extcon/extcon-usbc-cros-ec.c b/drivers/extcon/extcon-usbc-cros-ec.c
> index e759ed477735..598956f1dcae 100644
> --- a/drivers/extcon/extcon-usbc-cros-ec.c
> +++ b/drivers/extcon/extcon-usbc-cros-ec.c
> @@ -68,6 +68,8 @@ static int cros_ec_pd_command(struct cros_ec_extcon_info *info,
>  	int ret;
>  
>  	msg = kzalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL);
> +	if (!msg)
> +		return -ENOMEM;
>  
>  	msg->version = version;
>  	msg->command = command;
> 

Applied it. Thanks.

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics