linux-kernel - Re: [PATCH 4/8] power: ensure event is not used as format string

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Date:	Thu, 6 Jun 2013 17:39:14 -0700
From:	Anton Vorontsov <anton@...msg.org>
To:	Kees Cook <keescook@...omium.org>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jens Axboe <axboe@...nel.dk>,
	"David S. Miller" <davem@...emloft.net>,
	Herbert Xu <herbert@...dor.hengli.com.au>,
	David Woodhouse <dwmw2@...radead.org>,
	Karsten Keil <isdn@...ux-pingi.de>, stable@...r.kernel.org
Subject: Re: [PATCH 4/8] power: ensure event is not used as format string

On Thu, Jun 06, 2013 at 01:52:21PM -0700, Kees Cook wrote:
> The exposed interface for cm_notify_event() could result in the event
> msg string being parsed as a format string. Make sure it is only used
> as a literal string.
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Cc: stable@...r.kernel.org
> Cc: Anton Vorontsov <cbou@...l.ru>
> Cc: David Woodhouse <dwmw2@...radead.org>
> ---

Thanks a lot, Kees! This is now applied.

>  drivers/power/charger-manager.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
> index fefc39f..98de1dd 100644
> --- a/drivers/power/charger-manager.c
> +++ b/drivers/power/charger-manager.c
> @@ -450,7 +450,7 @@ static void uevent_notify(struct charger_manager *cm, const char *event)
>  	strncpy(env_str, event, UEVENT_BUF_SIZE);
>  	kobject_uevent(&cm->dev->kobj, KOBJ_CHANGE);
>  
> -	dev_info(cm->dev, event);
> +	dev_info(cm->dev, "%s", event);
>  }
>  
>  /**
> -- 
> 1.7.9.5
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