linux-kernel - Re: [PATCH 2/2] net/9p: Return error on read with NULL buffer

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Message-ID: <20101023195957.GA13348@cynthia.pants.nu>
Date:	Sat, 23 Oct 2010 12:59:57 -0700
From:	Brad Boyer <flar@...andria.com>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	v9fs-developer@...ts.sourceforge.net,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Sanchit Garg <sancgarg@...ux.vnet.ibm.com>
Subject: Re: [PATCH 2/2] net/9p: Return error on read with NULL buffer

On Mon, Oct 18, 2010 at 08:10:53PM +0530, Aneesh Kumar K.V wrote:
> This patch ensures that a read(fd, NULL, 0 ) returns  EFAULT on a 9p file.

Is there some specific reason you want this behavior? I believe the
generic Linux code returns success in this case. I tried this exact
system call with fd being a pty or a file on ext3 and got 0 for both.

	Brad Boyer
	flar@...andria.com

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