netdev - Re: [ROSE] [AX25] 6.15.10 long term stable kernel oops

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Message-ID: <e92e23a7-1503-454f-a7a2-cedab6e55fe2@free.fr>
Date: Sat, 16 Aug 2025 20:45:46 +0200
From: Bernard Pidoux <bernard.pidoux@...e.fr>
To: David Ranch <dranch@...nnet.net>, linux-hams@...r.kernel.org,
 netdev <netdev@...r.kernel.org>
Subject: Re: [ROSE] [AX25] 6.15.10 long term stable kernel oops

David,

For some reason my messages are not accepted by vger.kernel.org despite 
I configured thunderbird not to send html.

I just compiled and loaded kernel 6.15.1.

Up to now FPAC 4.1.4 is running fine and performing connexions with 
neighbour ROSE nodes.

I will let it run a while before starting to apply progressively the 
AX25 and ROSE patches committed in kernels 15.2 to 15.10

I will start with ax25 ones and see what happens.

73 de Bernard f6bvp / ai7bg



Le 16/08/2025 à 19:49, Bernard Pidoux a écrit :
> Hi David,
> 
> Actually Ubuntu stops responding without any message. No more response 
> from keyboard or mouse. Only switch power !
> 
> I am working on activating kernel messages on oops.
> 
> The bug is already present in 6.15.10 so there is no reason to look at a 
> more recent version.
> 
> I will report any progress if I find something interesting.
> 
> This is quite a challenge for me as I did not perform this kind of 
> kernel investigations since nearly a decade...and I am not getting younger !
> 
> 73 de Bernard, f6bvp / ai7bg
> 
> 
> Le 16/08/2025 à 19:32, David Ranch a écrit :
>>
>> Hey Bernard,
>>
>> Thanks for posting this issue.  Can you copy/paste in the Oops you're 
>> seeing?  I did see a recent ROSE issue on 6.16.0-rc6-next-20250718- 
>> syzkaller and I wonder if that could have created this issue:
>>
>> https://groups.google.com/g/syzkaller-bugs/c/0TmBbcJ2PKE
>>
>> Btw, I would say that posting this to netdev@...r.kernel.org would 
>> probably be more important than this Debian list since this is most 
>> likely a kernel issue and not a distro issue per se.
>>
>> --David
>> KI6ZHD
>>
>>
>> On 08/16/2025 10:02 AM, Bernard Pidoux wrote:
>>> Hi,
>>>
>>> I am continuously working on AX25 ROSE/FPAC node since decades, 
>>> running a number of RaspBerry Pi (Raspi OS 64bit) plus Ubuntu LTS on 
>>> a mini PC.
>>>
>>> Stable FPAC version 4.1.4 is performing packet switch quite well 
>>> although some improvements are underway.
>>>
>>> FPAC runs flawlessly with kernel 6.14.11.
>>>
>>> However, trying FPAC under stable kernel 6.15.10 experienced a frozen 
>>> system when issuing some commands like connect request.
>>>
>>> Investigations seem to show that ax25 connect is fine and that the 
>>> bug is probably in ROSE module .
>>>
>>> I am presently trying to find the faulty bug that triggers the kernel 
>>> oops by compiling and installing previous kernel versions starting 
>>> with 6.15.1.
>>>
>>> 73s de Bernard, f6bvp / ai7bg
>>>
>>> http://f6bvp.org
>>>
>>