Re: [patch] configfs: use capped length for ->store_attribute()

[Joel Becker <jlbec@evilplan.org>]

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@oracle.com>

Acked-by: Joel Becker <jlbec@evilplan.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);

-- 

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 Talking of Michaelangelo."

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