Hi,

I captured a screen picture of kernel panic in linux-6.16.0 that 
displays [mkiss]. See included picture.

Bernard


Le 16/08/2025 à 20:45, Bernard Pidoux a écrit :

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 :

quoted

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 :

quoted

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@vger.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:

quoted

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