linux-kernel - Re: [patch] w1: off by one in w1_f29_remove

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Date:	Fri, 29 Jul 2011 16:28:12 -0400
From:	Jean-François Dagenais <jeff.dagenais@...il.com>
To:	Dan Carpenter <error27@...il.com>
Cc:	Evgeniy Polyakov <johnpol@....mipt.ru>,
	Andrew Morton <akpm@...ux-foundation.org>,
	open list <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] w1: off by one in w1_f29_remove_slave()

Yup, confirmed, weird that I did not notice a crash, probably lucky shot in the environment I was using it.

On 2011-07-27, at 05:55, Dan Carpenter wrote:

> This reads past the end of the w1_f29_sysfs_bin_files[] array.  I
> don't have this hardware, but I assume it crashes every time the
> function is called.
> 
> Signed-off-by: Dan Carpenter <error27@...il.com>
Acked-by: Jean-François Dagenais <dagenaisj@...atest.com>
> 
> diff --git a/drivers/w1/slaves/w1_ds2408.c b/drivers/w1/slaves/w1_ds2408.c
> index c377818..0da4e97 100644
> --- a/drivers/w1/slaves/w1_ds2408.c
> +++ b/drivers/w1/slaves/w1_ds2408.c
> @@ -373,7 +373,7 @@ static int w1_f29_add_slave(struct w1_slave *sl)
> static void w1_f29_remove_slave(struct w1_slave *sl)
> {
> 	int i;
> -	for (i = NB_SYSFS_BIN_FILES; i <= 0; --i)
> +	for (i = NB_SYSFS_BIN_FILES - 1; i <= 0; --i)
> 		sysfs_remove_bin_file(&sl->dev.kobj,
> 			&(w1_f29_sysfs_bin_files[i]));
> }
> --
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