linux-kernel - Re: 2.6.37-rc1 kmemleak warnings when saving a file over cifs.

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Message-ID: <AANLkTikduZJ1pjKN7X7F2Uai1eqLyb1PTEMPJ7P==tT8@mail.gmail.com>
Date:	Tue, 9 Nov 2010 22:17:55 +1100
From:	Andrew Hendry <andrew.hendry@...il.com>
To:	Suresh Jayaraman <sjayaraman@...e.de>
Cc:	Steve French <smfrench@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-cifs@...r.kernel.org
Subject: Re: 2.6.37-rc1 kmemleak warnings when saving a file over cifs.

Yes that fixes the leak, appears fine now thanks.

On Tue, Nov 9, 2010 at 6:05 PM, Suresh Jayaraman <sjayaraman@...e.de> wrote:
> On 11/09/2010 11:31 AM, Andrew Hendry wrote:
>> The server is a qnap NAS, running linux 2.6.24
>
>> On Tue, Nov 9, 2010 at 3:12 PM, Steve French <smfrench@...il.com> wrote:
>>> On Mon, Nov 8, 2010 at 6:13 PM, Andrew Hendry <andrew.hendry@...il.com> wrote:
>>>> Have just noticed these in the past few days, now running 2.6.37-rc1+
>>>> Seems to be 1 logged per file save when using a text file with gedit over cifs.
>>>
>>> Can you tell the called function in cifs_setattr_unix vs. cifs_setattr_nounix
>>> (the former will usually be called when the server is Samba, the latter
>>> when the server is Windows or NetApp). �What is the server type?
>>>
>>>> unreferenced object 0xffff88022ee08b40 (size 32):
>>>> �comm "gedit", pid 2524, jiffies 4300160388 (age 2633.655s)
>>>> �hex dump (first 32 bytes):
>>>> � �5c 2e 67 6f 75 74 70 75 74 73 74 72 65 61 6d 2d �\.goutputstream-
>>>> � �35 42 41 53 4c 56 00 de 09 00 00 00 2c 26 78 ee �5BASLV......,&x.
>>>> �backtrace:
>>>> � �[<ffffffff81504a4d>] kmemleak_alloc+0x2d/0x60
>>>> � �[<ffffffff81136e13>] __kmalloc+0xe3/0x1d0
>>>> � �[<ffffffffa0313db0>] build_path_from_dentry+0xf0/0x230 [cifs]
>>>> � �[<ffffffffa031ae1e>] cifs_setattr+0x9e/0x770 [cifs]
>>>> � �[<ffffffff8115fe90>] notify_change+0x170/0x2e0
>>>> � �[<ffffffff81145ceb>] sys_fchmod+0x10b/0x140
>>>> � �[<ffffffff8100c172>] system_call_fastpath+0x16/0x1b
>>>> � �[<ffffffffffffffff>] 0xffffffffffffffff
>>>
>
> Are you using the mount option 'nounix'? I spotted a memleak in the
> nounix code path introduced by a recent patch and proposed a fix here:
>
>        http://thread.gmane.org/gmane.linux.kernel.cifs/1549
>
> Does this fix the leak for you?
>
>
>
> --
> Suresh Jayaraman
>
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