linux-kernel - Re: [PATCH] EXPORTFS: Don't return NULL from fh_to_dentry()/fh_to

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Message-ID: <20081205094115.GA27695@infradead.org>
Date:	Fri, 5 Dec 2008 04:41:15 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	David Howells <dhowells@...hat.com>
Cc:	torvalds@...l.org, akpm@...ux-foundation.org, bfields@...ldses.org,
	hch@...radead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] EXPORTFS: Don't return NULL from
	fh_to_dentry()/fh_to_parent()

On Fri, Dec 05, 2008 at 09:12:56AM +0000, David Howells wrote:
> Returning NULL from fh_to_dentry() and fh_to_parent() is not permitted, so
> return -ESTALE instead.  exportfs_decode_fh() does not check for NULL, but
> will try to dereference it as IS_ERR() does not check for it.
> 
> The generic_fh_to_dentry() and generic_fh_to_parent() functions also no longer
> return NULL, but return -ESTALE instead.
> 
> Signed-off-by: David Howells <dhowells@...hat.com>
> Acked-by: J. Bruce Fields <bfields@...i.umich.edu>

Looks good, thanks.   Linus, this is regression introduced in 2.6.28 by
me, so please apply.

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