I'm going down this route, starting on the Pi-1
git the rpi-6.1.y kernel
Verify the patches referenced in this thread exist in the code tree (they are)
compile
eat lunch and then dinner
install the kernel and see if it crashes 17 hours later.
For my ubuntu x86_64 desktop, I also did the apt source for the current source tree, and
apt source linux-image-unsigned-6.5.0-15-generic
in the downloaded tree, I notice the ax25 patches appear to be applied, so I wonder if desktop distros have these updates in place?
Add that to my list of things to try.
If I'm seeing this correctly, the stable kernel tree for rpi does NOT have the ax25 patches applied.?
The ax25 patches do appear in 5.15.y and the 6.1.y.? The only two I checked.