linux-kernel - Re: [PATCH] power: supply: lp8788: prevent out of bounds array access

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Message-ID: <20170411141857.ozxtxyftatg5i7ma@earth>
Date:   Tue, 11 Apr 2017 16:18:57 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     Giedrius Statkevičius 
        <giedrius.statkevicius@...il.com>
Cc:     milo.kim@...com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] power: supply: lp8788: prevent out of bounds array access

Hi,

On Sat, Mar 25, 2017 at 06:00:49PM +0200, Giedrius Statkevičius wrote:
> val might become 7 in which case stime[7] (array of length 7) would be
> accessed during the scnprintf call later and that will cause issues.
> Obviously, string concatenation is not intended here so just a comma needs
> to be added to fix the issue.
> 
> Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@...il.com>
> ---
>  drivers/power/supply/lp8788-charger.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/power/supply/lp8788-charger.c b/drivers/power/supply/lp8788-charger.c
> index 509e2b341bd6..677f7c40b25a 100644
> --- a/drivers/power/supply/lp8788-charger.c
> +++ b/drivers/power/supply/lp8788-charger.c
> @@ -651,7 +651,7 @@ static ssize_t lp8788_show_eoc_time(struct device *dev,
>  {
>  	struct lp8788_charger *pchg = dev_get_drvdata(dev);
>  	char *stime[] = { "400ms", "5min", "10min", "15min",
> -			"20min", "25min", "30min" "No timeout" };
> +			"20min", "25min", "30min", "No timeout" };
>  	u8 val;
>  
>  	lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val);

Thanks, queued with Fixes Tag.

-- Sebastian

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