linux-kernel - [PATCH stable 5.15 0/1] Fix bpf selftest build failure - error: 'struct bpf_test' has no member named 'fixup_kfunc_btf

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Date:   Fri,  1 Jul 2022 21:08:57 +0800
From:   Po-Hsu Lin <po-hsu.lin@...onical.com>
To:     stable@...r.kernel.org, gregkh@...uxfoundation.org
Cc:     memxor@...il.com, linux-kernel@...r.kernel.org, ast@...nel.org,
        po-hsu.lin@...onical.com
Subject: [PATCH stable 5.15 0/1] Fix bpf selftest build failure - error: 'struct bpf_test' has no member named 'fixup_kfunc_btf_id'

The bpf selftest build will fail on the stable 5.15 tree with:

  CC       test_stub.o
  BINARY   test_verifier
In file included from /home/ubuntu/linux/tools/testing/selftests/bpf/verifier/tests.h:21,
                 from test_verifier.c:432:
/home/ubuntu/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/linux/tools/testing/selftests/bpf/verifier/calls.c:124:9: warning: braces around scalar initializer
  124 |         .fixup_kfunc_btf_id = {
      |         ^

This is because of the fixup_kfunc_btf_id member in struct bpf_test
added in commit 13c6a37d40 ("selftests/bpf: Add test for reg2btf_ids
out of bounds access") from upstream.

We will need commit 0201b80772 ("selftests/bpf: Add test_verifier
support to fixup kfunc call insns") from upstream to solve this build
issue. Some backport work is needed for the 5.15 tree to skip
fixup_map_timer related changes, which came from commit e60e6962c5
("selftests/bpf: Add tests for restricted helpers").

Kumar Kartikeya Dwivedi (1):
  selftests/bpf: Add test_verifier support to fixup kfunc call insns

 tools/testing/selftests/bpf/test_verifier.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

-- 
2.7.4