linux-kernel - Re: [04/18] fuse: reject O_DIRECT flag also in fuse

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Message-ID: <20091217041534.GA26509@suse.de>
Date:	Wed, 16 Dec 2009 20:15:34 -0800
From:	Greg KH <gregkh@...e.de>
To:	David Daney <ddaney@...iumnetworks.com>
Cc:	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Csaba Henk <csaba@...ster.com>,
	Miklos Szeredi <mszeredi@...e.cz>,
	Harshavardhana <harsha@...ster.com>
Subject: Re: [04/18] fuse: reject O_DIRECT flag also in fuse_create

On Wed, Dec 16, 2009 at 05:36:42PM -0800, David Daney wrote:
> Greg KH wrote:
>> 2.6.27-stable review patch.  If anyone has any objections, please let us know.
>>
>> ------------------
>> From: Csaba Henk <csaba@...ster.com>
>>
>> commit 1b7323965a8c6eee9dc4e345a7ae4bff1dc93149 upstream.
>>
>> The comment in fuse_open about O_DIRECT:
>>
>>   "VFS checks this, but only _after_ ->open()"
>>
>> also holds for fuse_create, however, the same kind of check was missing there.
>>
>> As an impact of this bug, open(newfile, O_RDWR|O_CREAT|O_DIRECT) fails, but a
>> stub newfile will remain if the fuse server handled the implied FUSE_CREATE
>> request appropriately.
>>
>> Other impact: in the above situation ima_file_free() will complain to open/free
>> imbalance if CONFIG_IMA is set.
>>
>> Signed-off-by: Csaba Henk <csaba@...ster.com>
>> Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
>> Cc: Harshavardhana <harsha@...ster.com>
>> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
>>
>> ---
>>  fs/fuse/dir.c |    3 +++
>>  1 file changed, 3 insertions(+)
>>
>> --- a/fs/fuse/dir.c
>> +++ b/fs/fuse/dir.c
>> @@ -401,6 +401,9 @@ static int fuse_create_open(struct inode
>>  	if (flags & O_DIRECT)
>>  		return -EINVAL;
>>  +	if (flags & O_DIRECT)
>> +		return -EINVAL;
>> +
>
> I must be missing something.  The added part seems to be identical to the 
> lines just above.
>
> Forgive me if I am totally misreading the diff.

Oops, you are right, this was already included in the last .27 release,
my mistake.  I've now deleted it from the .27 queue.

thanks,

greg k-h
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