Re: [LTP] [PATCH v2] sendmsg testcase for ded34e0fe8fe8c2d595bfa30626654e4b87621e0

[Wanlong Gao <gaowanlong@cn.fujitsu.com>]

On 04/15/2013 05:03 PM, Jan Stancek wrote:
> 
> ----- Original Message -----
>> From: "Wanlong Gao" <gaowanlong@cn.fujitsu.com>
>> To: "Jan Stancek" <jstancek@redhat.com>
>> Cc: ltp-list@lists.sourceforge.net
>> Sent: Monday, 15 April, 2013 10:19:15 AM
>> Subject: Re: [LTP] [PATCH v2] sendmsg testcase for ded34e0fe8fe8c2d595bfa30626654e4b87621e0
>>
>> On 04/15/2013 03:58 PM, Jan Stancek wrote:
>>> reproducer for:
>>> BUG: unable to handle kernel NULL pointer dereference at 0000000000000250
>>>
>>> fixed in 3.9.0-0.rc5:
>>>   commit ded34e0fe8fe8c2d595bfa30626654e4b87621e0
>>>   Author: Paul Moore <pmoore@redhat.com>
>>>   Date:   Mon Mar 25 03:18:33 2013 +0000
>>>     unix: fix a race condition in unix_release()
>>>
>>> This reproducer should be able to trigger it easily on 4+ CPU systems
>>> just within couple of seconds.
>>
>> I didn't get panic on my v3.9-rc4 system by this test case.
> 
> I double checked if I got that -rc right, and that looks OK:
> $ git tag --contains ded34e0fe8fe8c2d595bfa30626654e4b87621e0
> v3.9-rc5
> v3.9-rc6
> v3.9-rc7

I'm sure that 3.9-rc4 don't contain this fix commit.

> 
> There is a switch "-s" for how many seconds it should run. Can you try to run
> it for couple of minutes, if that makes any difference?

I ran it for 5 minutes again but saw no difference.

Thanks,
Wanlong Gao

> 
> If not, then I'm afraid it's not as reproducible as I thought it would be.
> 
> Regards,
> Jan
> 
> 


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