[Bug]: Wrong modules are builded for some board and kernels

[seniorandre]

What happened?

My system NanoPC-T6-LTS
I have loaded linux headers per armbian-config and wrote simple module:

//only
module_init(sbl_init);
module_exit(sbl_exit);

Module is empty, only two methods.
Then i does insmod/rmmod and I have got errors.

andrey@NanoPC-T6-LTS:~/projects/linux-modules/sbl$ sudo insmod sbl.ko
andrey@NanoPC-T6-LTS:~/projects/linux-modules/sbl$ sudo rmmod sbl
rmmod: ERROR: ../libkmod/libkmod-module.c:856 kmod_module_remove_module() could not remove 'sbl': Device or resource busy
rmmod: ERROR: could not remove module sbl: Device or resource busy

dmesg is empty

How to reproduce?

That error I have at kernels 6.1.75, 6.1.99, 6.6, 6.12.13 and so on. But don`t have error at 6.1.43 (NanoPC-T6-LTS) and any desktop x86 systems like ubuntu, kubuntu and so on.
Also other users have same problem on their boards.
This behavior has been going on for over 6 months. It is not possible to build a working module per armbian.

Branch

main (main development branch)

On which host OS are you running the build script and observing this problem?

Ubuntu 24.04 Noble

Are you building on Windows WSL2?

• Yes, my Ubuntu/Debian/OtherOS is running on WSL2

Relevant log URL

https://paste.armbian.com/jozoreselu

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

Hey @seniorandre! 👋

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[github-actions]

Jira ticket: AR-2703

[igorpecovnik]

Also other users have same problem on their boards.

Thank you for sharing your findings. We’ve noticed that other users have reported similar issues, as seen in the forum thread you are mentioning. However, we kindly ask that such discussions be continued there in order to keep issues at one place and as this tracker is intended for framework-related issues. Once solution is found and its only a matter of integration, a PR https://github.com/armbian/build/pulls should be opened - by anyone.

This particular bug appears to be tied to the specific hardware/kernel combination and not related to Armbian OS or assembly itself. It's worth noting that this issue does not manifest on Raspberry Pi or x86 platforms, which benefit from significantly larger development resources — for instance, Raspberry Pi OS has a dedicated full-time staff and a yearly budget exceeding 1 million USD. In contrast, Armbian relies heavily on community support and volunteer contributions with budget (taken from here). And we compile 80 different kernels for docents of platforms. Most of them are not even close to level of Raspberry Pi. And even there, users finds issues https://github.com/raspberrypi/linux/issues

As frustrating as it may be, the reality in open source is that some issues—especially those requiring deep investigation—can take years to resolve. We fully understand the inconvenience and appreciate your patience and contributions.