Comment 0 for bug 2009436

Since 23th of Feb, some adt test for dkms packages (digimend-dkms is an example) started to pass even though it should fail.
Before, the test would fail during build, because CONFIG_USB=n.

Logs from last time it failed:
https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/amd64/d/digimend-dkms/20230213_171044_032fa@/log.gz

Logs where test passes.
https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/amd64/d/digimend-dkms/20230213_171044_032fa@/log.gz

Could not reproduce it locally, in a vm, a simple sudo apt install digimend-dkms will fail during build.
```
I: Testing binary package digimend-dkms
I: Trying to build digimend/10 for 5.15.0-1028-kvm
Creating symlink /var/lib/dkms/digimend/10/source -> /usr/src/digimend-10

Kernel preparation unnecessary for this kernel. Skipping...

Building module:
cleaning build area...
make -j1 KERNELRELEASE=5.15.0-1028-kvm KVERSION=5.15.0-1028-kvm...(bad exit status: 2)
Error! Bad return status for module build on kernel: 5.15.0-1028-kvm (x86_64)
Consult /var/lib/dkms/digimend/10/build/make.log for more information.
E: digimend/10 failed to build for 5.15.0-1028-kvm
========== /var/lib/dkms/digimend/10/build/make.log ==========
DKMS make.log for digimend-10 for kernel 5.15.0-1028-kvm (x86_64)
Sat Jan 28 00:05:19 UTC 2023
make -C /lib/modules/5.15.0-1028-kvm/build M=/var/lib/dkms/digimend/10/build modules
make[1]: Entering directory '/usr/src/linux-headers-5.15.0-1028-kvm'
  CC [M] /var/lib/dkms/digimend/10/build/hid-kye.o
  CC [M] /var/lib/dkms/digimend/10/build/hid-uclogic-core.o
  CC [M] /var/lib/dkms/digimend/10/build/hid-uclogic-rdesc.o
  CC [M] /var/lib/dkms/digimend/10/build/hid-uclogic-params.o
/var/lib/dkms/digimend/10/build/hid-uclogic-params.c: In function ‘uclogic_params_init’:
/var/lib/dkms/digimend/10/build/hid-uclogic-params.c:1147:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
 1147 | if (bNumInterfaces != 3) {
      | ^
/var/lib/dkms/digimend/10/build/hid-uclogic-params.c:1165:9: note: here
 1165 | case VID_PID(USB_VENDOR_ID_HUION,
      | ^~~~
  LD [M] /var/lib/dkms/digimend/10/build/hid-uclogic.o
  CC [M] /var/lib/dkms/digimend/10/build/hid-polostar.o
  CC [M] /var/lib/dkms/digimend/10/build/hid-viewsonic.o
  MODPOST /var/lib/dkms/digimend/10/build/Module.symvers
ERROR: modpost: "usb_string" [/var/lib/dkms/digimend/10/build/hid-uclogic.ko] undefined!
ERROR: modpost: "usb_control_msg" [/var/lib/dkms/digimend/10/build/hid-uclogic.ko] undefined!
ERROR: modpost: "usb_hid_driver" [/var/lib/dkms/digimend/10/build/hid-uclogic.ko] undefined!
make[2]: *** [scripts/Makefile.modpost:133: /var/lib/dkms/digimend/10/build/Module.symvers] Error 1
make[2]: *** Deleting file '/var/lib/dkms/digimend/10/build/Module.symvers'
make[1]: *** [Makefile:1819: modules] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.15.0-1028-kvm'
make: *** [Makefile:25: modules] Error 2
====================
./digimend/10/build/make.log
autopkgtest [00:05:23]: test dkms-autopkgtest: -----------------------]
dkms-autopkgtest FAIL non-zero exit status 1
autopkgtest [00:05:24]: test dkms-autopkgtest: - - - - - - - - - - results - - - - - - - - - -
autopkgtest [00:05:24]: @@@@@@@@@@@@@@@@@@@@ summary
dkms-autopkgtest FAIL non-zero exit status 1
```

Test fails with exitcode 1, and autopkgtest return 4 as exitcode.

This happens in multiple modules (oss4, rtl8812au), they are supposed to fail because a config is not enabled, but now they pass (superficially). This may affect other derivatives as well that have some config options disabled.
To be investigated.