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Date:   Mon, 23 May 2022 15:30:37 -0400 (EDT)
From:   Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To:     kernel test robot <oliver.sang@intel.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        lkp <lkp@lists.01.org>, 0day robot <lkp@intel.com>
Message-ID: <1454426300.65656.1653334237745.JavaMail.zimbra@efficios.com>
In-Reply-To: <20220523141434.GA17163@xsang-OptiPlex-9020>
References: <20220523141434.GA17163@xsang-OptiPlex-9020>
Subject: Re: [rseq]  3bb11f3f68: kernel-selftests.rseq.make_fail
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Thread-Topic: 3bb11f3f68: kernel-selftests.rseq.make_fail
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----- On May 23, 2022, at 10:14 AM, kernel test robot oliver.sang@intel.com=
 wrote:

> Greeting,
>=20
> FYI, we noticed the following commit (built with gcc-11):
>=20
> commit: 3bb11f3f6872a692759f653f90d10674deb330a4 ("rseq: Remove broken ua=
pi
> field layout on 32-bit little endian")
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable-rc.git
> linux-5.15.y
>=20
> in testcase: kernel-selftests
> version: kernel-selftests-x86_64-8d3977ef-1_20220520
> with following parameters:
>=20
>=09group: rseq
>=09ucode: 0xec
>=20
> test-description: The kernel contains a set of "self tests" under the
> tools/testing/selftests/ directory. These are intended to be small unit t=
ests
> to exercise individual code paths in the kernel.
> test-url: https://www.kernel.org/doc/Documentation/kselftest.txt
>=20
>=20
> on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 1=
6G
> memory
>=20
> caused below changes (please refer to attached dmesg/kmsg for entire
> log/backtrace):

I suspect this is because commit "rseq: Remove broken uapi field layout on =
32-bit little endian"

needs to have this prior commit cherry-picked as well:

commit 5c105d55a9 ("selftests/rseq: introduce own copy of rseq uapi header"=
)

Thanks,

Mathieu

>=20
>=20
>=20
>=20
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <oliver.sang@intel.com>
>=20
> KERNEL SELFTESTS: linux_headers_dir is
> /usr/src/linux-headers-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653=
f90d10674deb330a4
> 2022-05-21 14:37:09 ln -sf /usr/bin/clang
> 2022-05-21 14:37:09 ln -sf /usr/bin/llc
> 2022-05-21 14:37:09 sed -i s/default_timeout=3D45/default_timeout=3D300/
> kselftest/runner.sh
> 2022-05-21 14:37:09 make -C rseq
> make: Entering directory
> '/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f6=
53f90d10674deb330a4/tools/testing/selftests/rseq'
> gcc -O2 -Wall -g -I./ -I../../../../usr/include/
> -L/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f=
653f90d10674deb330a4/tools/testing/selftests/rseq
> -Wl,-rpath=3D./  -shared -fPIC rseq.c -lpthread -o
> /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f65=
3f90d10674deb330a4/tools/testing/selftests/rseq/librseq.so
> In file included from rseq.c:30:
> rseq.h: In function =E2=80=98rseq_clear_rseq_cs=E2=80=99:
> rseq.h:143:20: error: request for member =E2=80=98ptr=E2=80=99 in somethi=
ng not a structure or
> union
>  143 |  __rseq_abi.rseq_cs.ptr =3D 0;
>      |                    ^
> make: *** [Makefile:27:
> /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f65=
3f90d10674deb330a4/tools/testing/selftests/rseq/librseq.so]
> Error 1
> make: Leaving directory
> '/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f6=
53f90d10674deb330a4/tools/testing/selftests/rseq'
> 2022-05-21 14:37:10 make run_tests -C rseq
> make: Entering directory
> '/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f6=
53f90d10674deb330a4/tools/testing/selftests/rseq'
> gcc -O2 -Wall -g -I./ -I../../../../usr/include/
> -L/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f=
653f90d10674deb330a4/tools/testing/selftests/rseq
> -Wl,-rpath=3D./  -shared -fPIC rseq.c -lpthread -o
> /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f65=
3f90d10674deb330a4/tools/testing/selftests/rseq/librseq.so
> In file included from rseq.c:30:
> rseq.h: In function =E2=80=98rseq_clear_rseq_cs=E2=80=99:
> rseq.h:143:20: error: request for member =E2=80=98ptr=E2=80=99 in somethi=
ng not a structure or
> union
>  143 |  __rseq_abi.rseq_cs.ptr =3D 0;
>      |                    ^
> make: *** [Makefile:27:
> /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f65=
3f90d10674deb330a4/tools/testing/selftests/rseq/librseq.so]
> Error 1
> make: Leaving directory
> '/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f6=
53f90d10674deb330a4/tools/testing/selftests/rseq'
>=20
>=20
>=20
> To reproduce:
>=20
>        git clone https://github.com/intel/lkp-tests.git
>        cd lkp-tests
>        sudo bin/lkp install job.yaml           # job file is attached in =
this email
>        bin/lkp split-job --compatible job.yaml # generate the yaml file f=
or lkp run
>        sudo bin/lkp run generated-yaml-file
>=20
>        # if come across any failure that blocks the test,
>        # please remove ~/.lkp and /lkp dir to run from a clean state.
>=20
>=20
>=20
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp

--=20
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com