linux-kernel - Re: [linux-stable-rc:linux-5.10.y 4948/4972] tools/testing/selftests/bpf/prog_tests/core_reloc.c:860: undefined reference to `ASSERT

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Date:   Tue, 10 Aug 2021 08:11:13 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Andrii Nakryiko <andrii@...nel.org>, kbuild-all@...ts.01.org,
        open list <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [linux-stable-rc:linux-5.10.y 4948/4972] tools/testing/selftests/bpf/prog_tests/core_reloc.c:860:
 undefined reference to `ASSERT_FALSE'

On Tue, Aug 10, 2021 at 4:25 AM kernel test robot <lkp@...el.com> wrote:
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.10.y
> head:   e97bd1e03e6ef58ec47ee7f085f8c14ed6329cf7
> commit: 183d9ebd449c20658a1aaf580f311140bbc7421d [4948/4972] selftests/bpf: Fix core_reloc test runner
> config: x86_64-rhel-8.3-kselftests (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce:
>         # apt-get install sparse
>         # sparse version: v0.6.3-348-gf0e6938b-dirty
>         # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=183d9ebd449c20658a1aaf580f311140bbc7421d
>         git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
>         git fetch --no-tags linux-stable-rc linux-5.10.y
>         git checkout 183d9ebd449c20658a1aaf580f311140bbc7421d
>         # save the attached .config to linux build tree
>         make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash -C tools/testing/selftests/bpf install
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
>    /usr/bin/ld: tools/testing/selftests/bpf/core_reloc.test.o: in function `test_core_reloc':
> >> tools/testing/selftests/bpf/prog_tests/core_reloc.c:860: undefined reference to `ASSERT_FALSE'
>    collect2: error: ld returned 1 exit status
> --
>    /usr/bin/ld: tools/testing/selftests/bpf/no_alu32/core_reloc.test.o: in function `test_core_reloc':
> >> tools/testing/selftests/bpf/prog_tests/core_reloc.c:860: undefined reference to `ASSERT_FALSE'
>    collect2: error: ld returned 1 exit status
>

ASSERT_FALSE() macro is defined in test_progs.h, which is included
from core_reloc.c. There must be something wrong about how kernel test
robot is building selftests/bpf.

>
> vim +860 tools/testing/selftests/bpf/prog_tests/core_reloc.c
>
>    765
>    766  void test_core_reloc(void)
>    767  {
>    768          const size_t mmap_sz = roundup_page(sizeof(struct data));
>    769          struct bpf_object_load_attr load_attr = {};
>    770          struct core_reloc_test_case *test_case;
>    771          const char *tp_name, *probe_name;
>    772          int err, i, equal;
>    773          struct bpf_link *link = NULL;
>    774          struct bpf_map *data_map;
>    775          struct bpf_program *prog;
>    776          struct bpf_object *obj;
>    777          uint64_t my_pid_tgid;
>    778          struct data *data;
>    779          void *mmap_data = NULL;
>    780

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