netdev - Re: v3 for tcp friends?

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Date:	Mon, 21 Jan 2013 15:31:17 +0800
From:	Li Yu <raise.sail@...il.com>
To:	David Miller <davem@...emloft.net>
CC:	brutus@...gle.com, netdev@...r.kernel.org
Subject: Re: v3 for tcp friends?

于 2013年01月21日 15:29, Li Yu 写道:
> 于 2012年09月05日 00:58, David Miller 写道:
>> From: Bruce Curtis <brutus@...gle.com>
>> Date: Tue, 4 Sep 2012 08:10:23 -0700
>>
>>> Will do, issues addressed, I'll get the patch out later today or
>>> tomorrow at the latest.
>>
>> Thanks a lot Bruce.
>> --
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>
>
> Hi, Bruce,
>
>      I tested the TCP friends, found a bug here:
>
> [  106.541372] Pid: 1765, comm: client Not tainted 3.7.0-rc1+ #25
> [  106.543121] Call Trace:
> [  106.543950]  [<ffffffff8133d212>] inet_sock_destruct+0x102/0x1f0
> [  106.545687]  [<ffffffff812c38ad>] __sk_free+0x1d/0x110
> [  106.547209]  [<ffffffff812c3a1c>] sk_free+0x1c/0x20
> [  106.548611]  [<ffffffff8131680c>] tcp_close+0x6c/0x3f0
> [  106.549863]  [<ffffffff8133caea>] inet_release+0xda/0xf0
> [  106.551134]  [<ffffffff8133ca30>] ? inet_release+0x20/0xf0
> [  106.552419]  [<ffffffff8137f3de>] ? mutex_unlock+0xe/0x10
> [  106.553658]  [<ffffffff812bf948>] sock_release+0x28/0xa0
> [  106.557366]  [<ffffffff812bfd69>] sock_close+0x29/0x30
> [  106.558831]  [<ffffffff81128972>] __fput+0x122/0x210
> [  106.560541]  [<ffffffff81128a6e>] ____fput+0xe/0x10
> [  106.562006]  [<ffffffff8105354e>] task_work_run+0x9e/0xd0
> [  106.563285]  [<ffffffff810027e1>] do_notify_resume+0x61/0x70
> [  106.564582]  [<ffffffff8138a908>] int_signal+0x12/0x17
>
>
>      I also backported and tested it on stable kernel 3.7.3/RHEL6
> kernel, this bug still exists. It seem that client may close listening
> sockets, may we need to add one reference count for listen socket
> before send its address to peer?
>

Sorry, I lost an important line of kernel log before above them:

[  106.539367] IPv4: Attempt to release TCP socket in state 10 
ffff880074abb5c0

BTW: state 10 = TCP_LISTEN

>      And, our TCP friends v4? :)
>
>      Thanks
>
> Yu
>

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