linux-kernel - Re: [105/105] nfsd4: fix oops on lock failure

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Message-ID: <8762qbwnf1.fsf@devron.myhome.or.jp>
Date:	Tue, 19 Apr 2011 01:10:26 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	"J. Bruce Fields" <bfields@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	stable@...nel.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Neil Brown <neilb@...e.de>,
	linux-nfs@...r.kernel.org
Subject: Re: [105/105] nfsd4: fix oops on lock failure

OGAWA Hirofumi <hirofumi@...l.parknet.co.jp> writes:

> "J. Bruce Fields" <bfields@...hat.com> writes:
>
>> On Sun, Apr 17, 2011 at 09:10:12AM -0700, Linus Torvalds wrote:
>>> On Sun, Apr 17, 2011 at 8:03 AM, OGAWA Hirofumi
>>> <hirofumi@...l.parknet.co.jp> wrote:
>>> >
>>> > I'm looking filp leak on recent kernel. Well, anyway,
>>
>> Does this fix it?
>
> It seems to be no, unfortunately. filp leak is not so fast, and obvious
> reproduce process is not known yet. Well, sigh, I'm starting to add
> debugging code for it...

Ah, I was missing patch itself. I'll see.

> commit 5152c8a947359758862d4631863e68e83ec01048
> Author: J. Bruce Fields <bfields@...hat.com>
> Date:   Fri Apr 15 18:08:26 2011 -0400
> 
>     nfsd4: fix struct file leak on delegation
>     
>     Introduced by acfdf5c383b38f7f4dddae41b97c97f1ae058f49.
>     
>     Cc: stable@...nel.org
>     Reported-by: Gerhard Heift <ml-nfs-linux-20110412-ef47@...ift.de>
>     Signed-off-by: J. Bruce Fields <bfields@...hat.com>
> 
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index aa309aa..c79a983 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -258,6 +258,7 @@ static void nfs4_put_deleg_lease(struct nfs4_file *fp)
>  	if (atomic_dec_and_test(&fp->fi_delegees)) {
>  		vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease);
>  		fp->fi_lease = NULL;
> +		fput(fp->fi_deleg_file);
>  		fp->fi_deleg_file = NULL;
>  	}
>  }
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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