linux-kernel - Re: [patch] configfs: use capped length for ->store

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 2 May 2013 14:51:53 -0700
From:	Joel Becker <jlbec@...lplan.org>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch] configfs: use capped length for ->store_attribute()

On Tue, Apr 30, 2013 at 10:28:14AM +0300, Dan Carpenter wrote:
> The difference between "count" and "len" is that "len" is capped at
> 4095.  Changing it like this makes it match how sysfs_write_file() is
> implemented.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Acked-by: Joel Becker <jlbec@...lplan.org>

Do you want me to push this up, or will you be sending it?

Joel


> ---
> This is a static analysis patch.  I haven't found any store_attribute()
> functions where this change makes a difference.
> 
> diff --git a/fs/configfs/file.c b/fs/configfs/file.c
> index 2b6cb23..1d1c41f 100644
> --- a/fs/configfs/file.c
> +++ b/fs/configfs/file.c
> @@ -203,7 +203,7 @@ configfs_write_file(struct file *file, const char __user *buf, size_t count, lof
>  	mutex_lock(&buffer->mutex);
>  	len = fill_write_buffer(buffer, buf, count);
>  	if (len > 0)
> -		len = flush_write_buffer(file->f_path.dentry, buffer, count);
> +		len = flush_write_buffer(file->f_path.dentry, buffer, len);
>  	if (len > 0)
>  		*ppos += len;
>  	mutex_unlock(&buffer->mutex);

-- 

"In the room the women come and go
 Talking of Michaelangelo."

			http://www.jlbec.org/
			jlbec@...lplan.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/