ubuntu_bpf build failed with "error: ‘struct bpf_test’ has no member named ‘fixup_kfunc_btf_id’" on J-5.15 / F-5.15

[Po-Hsu Lin]

Issue found on Jammy 5.15, the test build will fail with:

 In file included from /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/verifier/tests.h:21,
                  from test_verifier.c:432:
 /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/verifier/calls.c:124:10: error: ‘struct bpf_test’ has no member named ‘fixup_kfunc_btf_id’
   124 | .fixup_kfunc_btf_id = {
       | ^~~~~~~~~~~~~~~~~~
 /home/ubuntu/autotest/client/tmp/ubuntu_bpf/src/linux/tools/testing/selftests/bpf/verifier/calls.c:124:9: warning: braces around scalar initializer
   124 | .fixup_kfunc_btf_id = {
       | ^

This is because of commit 13c6a37d4 "selftests/bpf: Add test for reg2btf_ids out of bounds access" upstream.

Issue reported to stable mailing list:
https://<email address hidden>/T/#m3ad9b4882ab3d98fc65feee95f5d78019461835f

[Po-Hsu Lin (cypressyew)]

Please find attachment for the build log.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1980517

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Po-Hsu Lin (cypressyew)]

Patch queued for stable 5.15
https://<email address hidden>/T/

After it's landed we will be able to get this fix via stable update.

[Po-Hsu Lin (cypressyew)]

Patch applied with stable update bug 1986728 and bug 1987451