linux-kernel - Re: [PATCH] nfsd: fix NULL dereference in nfsd

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Message-ID: <AANLkTimh=r57ZJU5KiXganaZhVk18jJE5qm=s+nhpX8v@mail.gmail.com>
Date:	Sat, 14 Aug 2010 10:32:41 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	"J. Bruce Fields" <bfields@...ldses.org>,
	Neil Brown <neilb@...e.de>, Al Viro <viro@...iv.linux.org.uk>,
	Christoph Hellwig <hch@....de>, linux-nfs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] nfsd: fix NULL dereference in nfsd_statfs()

On Fri, Aug 13, 2010 at 10:53 PM, Takashi Iwai <tiwai@...e.de> wrote:
> The commit ebabe9a9001af0af56c0c2780ca1576246e7a74b
>    pass a struct path to vfs_statfs
> introduced the struct path initialization, and this seems to trigger
> an Oops on my machine.
>
> fh_dentry field may be NULL and set later in fh_verify(), thus the
> initialization of path must be after fh_verify().
>
> Signed-off-by: Takashi Iwai <tiwai@...e.de>
Reviewed-by: Minchan Kim <minchan.kim@...il.com>

Today, I had a same problem on mmotm so I made a similar patch.
Andrew. Please apply this patch on mmotm for smooth testing.


-- 
Kind regards,
Minchan Kim
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