Re: [rseq] 3bb11f3f68: kernel-selftests.rseq.make_fail

[Mathieu Desnoyers]

----- On May 23, 2022, at 10:14 AM, kernel test robot oliver.sang@xxxxxxxxx wrote:

> Greeting,
> 
> FYI, we noticed the following commit (built with gcc-11):
> 
> commit: 3bb11f3f6872a692759f653f90d10674deb330a4 ("rseq: Remove broken uapi
> field layout on 32-bit little endian")
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable-rc.git
> linux-5.15.y
> 
> in testcase: kernel-selftests
> version: kernel-selftests-x86_64-8d3977ef-1_20220520
> with following parameters:
> 
>	group: rseq
>	ucode: 0xec
> 
> test-description: The kernel contains a set of "self tests" under the
> tools/testing/selftests/ directory. These are intended to be small unit tests
> to exercise individual code paths in the kernel.
> test-url: https://www.kernel.org/doc/Documentation/kselftest.txt
> 
> 
> on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 16G
> memory
> 
> 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

> 
> 
> 
> 
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
> 
> KERNEL SELFTESTS: linux_headers_dir is
> /usr/src/linux-headers-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4
> 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=45/default_timeout=300/
> 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-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq'
> gcc -O2 -Wall -g -I./ -I../../../../usr/include/
> -L/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq
> -Wl,-rpath=./  -shared -fPIC rseq.c -lpthread -o
> /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq/librseq.so
> In file included from rseq.c:30:
> rseq.h: In function ‘rseq_clear_rseq_cs’:
> rseq.h:143:20: error: request for member ‘ptr’ in something not a structure or
> union
>  143 |  __rseq_abi.rseq_cs.ptr = 0;
>      |                    ^
> make: *** [Makefile:27:
> /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq/librseq.so]
> Error 1
> make: Leaving directory
> '/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4/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-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq'
> gcc -O2 -Wall -g -I./ -I../../../../usr/include/
> -L/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq
> -Wl,-rpath=./  -shared -fPIC rseq.c -lpthread -o
> /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq/librseq.so
> In file included from rseq.c:30:
> rseq.h: In function ‘rseq_clear_rseq_cs’:
> rseq.h:143:20: error: request for member ‘ptr’ in something not a structure or
> union
>  143 |  __rseq_abi.rseq_cs.ptr = 0;
>      |                    ^
> make: *** [Makefile:27:
> /usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq/librseq.so]
> Error 1
> make: Leaving directory
> '/usr/src/perf_selftests-x86_64-rhel-8.3-kselftests-3bb11f3f6872a692759f653f90d10674deb330a4/tools/testing/selftests/rseq'
> 
> 
> 
> To reproduce:
> 
>        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 for lkp run
>        sudo bin/lkp run generated-yaml-file
> 
>        # if come across any failure that blocks the test,
>        # please remove ~/.lkp and /lkp dir to run from a clean state.
> 
> 
> 
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp

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