linux-kernel - Re: [PATCH 2/3] vfs: remove redundant position check in do

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Message-ID: <20090810145641.GB4925@cmpxchg.org>
Date:	Mon, 10 Aug 2009 16:56:41 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Jeff Layton <jlayton@...hat.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, hch@...radead.org, rlove@...gle.com,
	msb@...gle.com, viro@...iv.linux.org.uk
Subject: Re: [PATCH 2/3] vfs: remove redundant position check in do_sendfile

On Mon, Aug 10, 2009 at 08:17:42AM -0400, Jeff Layton wrote:
> As Johannes Weiner pointed out, one of the range checks in do_sendfile
> is redundant and is already checked in rw_verify_area.
> 
> Signed-off-by: Jeff Layton <jlayton@...hat.com>

Reviewed-by: Johannes Weiner <hannes@...xchg.org>

Thanks!

> ---
>  fs/read_write.c |    3 ---
>  1 files changed, 0 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/read_write.c b/fs/read_write.c
> index 6c8c55d..3ac2898 100644
> --- a/fs/read_write.c
> +++ b/fs/read_write.c
> @@ -839,9 +839,6 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
>  		max = min(in_inode->i_sb->s_maxbytes, out_inode->i_sb->s_maxbytes);
>  
>  	pos = *ppos;
> -	retval = -EINVAL;
> -	if (unlikely(pos < 0))
> -		goto fput_out;
>  	if (unlikely(pos + count > max)) {
>  		retval = -EOVERFLOW;
>  		if (pos >= max)
> -- 
> 1.6.0.6
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