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

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Message-ID: <87zknnv7id.fsf@devron.myhome.or.jp>
Date:	Tue, 19 Apr 2011 01:39:22 +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:

>> 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;
>>  	}
>>  }

For now, I feel this explain filp leak on my system. the leak is
increased slowly (filp, cred_jar, and no nfs* slabs), and leak is on
nfs server side.

I'll start test of this patch, and see what happens.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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