linux-kernel - selftests: arm64: mte: check_prctl.c:72:17: error: use of undeclared identifier 'AT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <CA+G9fYusqGejrepNPCR-7ZZDPeQQfZgf2z=_aUz_03QHm7Ccaw@mail.gmail.com>
Date: Tue, 15 Jul 2025 16:53:04 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: open list <linux-kernel@...r.kernel.org>, 
	Linux ARM <linux-arm-kernel@...ts.infradead.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>
Cc: Yeoreum Yun <yeoreum.yun@....com>, Mark Brown <broonie@...nel.org>, 
	Catalin Marinas <catalin.marinas@....com>, Arnd Bergmann <arnd@...db.de>, 
	Dan Carpenter <dan.carpenter@...aro.org>, Anders Roxell <anders.roxell@...aro.org>, 
	Shuah Khan <shuah@...nel.org>, Benjamin Copeland <ben.copeland@...aro.org>
Subject: selftests: arm64: mte: check_prctl.c:72:17: error: use of undeclared
 identifier 'AT_HWCAP3'

The selftests arm64 mte build failed on the Linux next-20250703 onwards
with clang-20 toolchain. still seen on today's tag next-20250714.

First seen on the tag next-20250703
Good: next-20250702
Bad:  next-20250703 (next-20250714)

Regression Analysis:
- New regression? Yes
- Reproducibility? Yes

Boot regression: next-20250703 check_prctl.c error use of undeclared
identifier 'AT_HWCAP3'

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

## Build log
make[5]: Entering directory '/builds/linux/tools/testing/selftests/arm64/mte'
  CC       check_buffer_fill
  CC       check_child_memory
  CC       check_gcr_el1_cswitch
  CC       check_hugetlb_options
  CC       check_ksm_options
  CC       check_mmap_options
  CC       check_prctl
check_prctl.c:72:17: error: use of undeclared identifier 'AT_HWCAP3'
   72 |         if ((getauxval(AT_HWCAP3) & hwcap3) != hwcap3) {
      |                        ^
1 error generated.
make[5]: *** [../../lib.mk:222: selftest/arm64/mte/check_prctl] Error 1
make[5]: Leaving directory 'tools/testing/selftests/arm64/mte'

## Git Changes
git log --oneline   next-20250702..next-20250703
tools/testing/selftests/arm64/mte/
1f488fb91378e kselftest/arm64/mte: Add MTE_STORE_ONLY testcases
391ca7c81b85c kselftest/arm64/mte: Preparation for mte store only test
d09674f98cdbf kselftest/arm64/mte: Add mtefar tests on check_mmap_options
64a64e5d12f07 kselftest/arm64/mte: Refactor check_mmap_option test
49cee364c8665 kselftest/arm64/mte: Add verification for address tag in
signal handler
ed434c6e08132 kselftest/arm64/mte: Add address tag related macro and function
2e3e356560ef5 kselftest/arm64/mte: Check MTE_FAR feature is supported
cfafa517c9e65 kselftest/arm64/mte: Register mte signal handler with
SA_EXPOSE_TAGBITS

## Source
* Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
* Project: https://regressions.linaro.org/lkft/linux-next-master/next-20250714/
* Architectures: arm64
* Toolchains: clang-20
* Kconfigs: defconfig

## Build
* Test details:
https://regressions.linaro.org/lkft/linux-next-master/next-20250714/kselftest-arm64/arm64_check_ksm_options/
* Test run: https://regressions.linaro.org/lkft/linux-next-master/next-20250714/testruns/1615508/
* Test plan: https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2zrW3Ut4mYWOxPVnJTOY5qrft0P
* Build link: https://storage.tuxsuite.com/public/ampere/ci/builds/2zrZgjFum1wBbTRrsvDGnHC9JMt/
* Kernel config:
https://storage.tuxsuite.com/public/ampere/ci/builds/2zrZgjFum1wBbTRrsvDGnHC9JMt/config

--
Linaro LKFT
https://lkft.linaro.org