linux-kernel - Re: Linux 4.14 - BUG: unable to handle kernel paging request at ffffffff3bbbe160 IP: audit_signal

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Message-ID: <30c0a4fc-7461-524e-17fe-bbe6622d0e11@osg.samsung.com>
Date:   Mon, 27 Nov 2017 13:18:45 -0700
From:   Shuah Khan <shuahkh@....samsung.com>
To:     John Johansen <john.johansen@...onical.com>
Cc:     torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
        Shuah Khan <shuahkh@....samsung.com>
Subject: Re: Linux 4.14 - BUG: unable to handle kernel paging request at
 ffffffff3bbbe160 IP: audit_signal_cb+0x75/0xf0

On 11/27/2017 11:08 AM, John Johansen wrote:
> On 11/21/2017 04:28 PM, Shuah Khan wrote:
>> On 11/21/2017 04:53 PM, John Johansen wrote:
>>> On 11/21/2017 10:02 AM, Shuah Khan wrote:
>>>> On 11/21/2017 10:44 AM, John Johansen wrote:
>>>>> On 11/21/2017 08:58 AM, Shuah Khan wrote:
>>>>>> Hi John,
>>>>>>
>>>>>> I am seeing the following on my laptop. Unfortunately this is my primary
>>>>>> system and my ability to bisect might be a bit limited. The system is
>>>>>> running 
>>>>>>
>>>>>> 4.14.0+ #4 SMP Tue Nov 14 19:25:58 MST 2017 x86_64 x86_64 x86_64 GNU/Linux
>>>>>>
>>>>>> on Ubuntu 17.10 base.
>>>>>>
>>>>>> Is this a known issue? Please see the dmesg excerpts below:
>>>>>>
>>>>> Its not. I'll start looking into it today
>>>>>
>>>>> Do you have any other information that you can send to me?
>>>>>
>>>>> Any particular task/work load that triggers this?
>>>>> Can you tar up your /etc/apparmor.d/ and send that to me?
>>>>>
>>>>>
>>>>
>>>> Yeah. I forgot mention that detail :)
>>>>
>>> So my first attempts to replicate have failed.
>>>
>>> Can you confirm the sha of your kernel build? If its has some none upstream patches can you provide the sha your kernel is based on.
>>>
>>> My testing so far were based on bebc6082da0a9f5d47a1ea2edc099bf671058bd4
>>>
>>>
>>> Can you also send me your kernel config so I can better replicate your build
>>>
>>
>> commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 (tag: v4.14)
>> Author: Linus Torvalds <torvalds@...ux-foundation.org>
>> Date:   Sun Nov 12 10:46:13 2017 -0800
>>
>>     Linux 4.14
>>
>> The above is the top commit in my tree. Config attached.
>>
> 
> thanks Shuah,
> 
> find below the latest revision of the patch. Nothing has changed code
> wise but I have added Tested-by: entries for the 3 people of have
> tested it and reported it working for them, and also added Cc: stable
> entry.
> 
> ---
> 
>>>From d198240cace036c7d1e502fd20fe416df4fd8c24 Mon Sep 17 00:00:00 2001
> From: John Johansen <john.johansen@...onical.com>
> Date: Wed, 22 Nov 2017 07:33:38 -0800
> Subject: [PATCH] apparmor: fix oops in audit_signal_cb hook
> 

I am not seeing the problem with this patch. I opened a couple
of files with evince. Looks good to me so far.

Tested-by: Shuah Khan <shuahkh@....samsung.com>

thanks,
-- Shuah