linux-kernel - include/linux/fortify-string.h:293:17: error: call to '__write_overflow' declared with attribute error: detected write beyond size of object (1st parameter)

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Message-ID: <CA+G9fYvWkS-8f9kOBTzixjGSNN8262StoVv2ERk7mRKcU+p+BA@mail.gmail.com>
Date: Tue, 26 Nov 2024 20:28:40 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: audit@...r.kernel.org, open list <linux-kernel@...r.kernel.org>, 
	lkft-triage@...ts.linaro.org, Linux Regressions <regressions@...ts.linux.dev>
Cc: eparis@...hat.com, Paul Moore <paul@...l-moore.com>, Arnd Bergmann <arnd@...db.de>, 
	Dan Carpenter <dan.carpenter@...aro.org>, Anders Roxell <anders.roxell@...aro.org>
Subject: include/linux/fortify-string.h:293:17: error: call to
 '__write_overflow' declared with attribute error: detected write beyond size
 of object (1st parameter)

The arm64 hardening.config builds failed on the Linux mainline master
for the arm64 architectures.

First seen on Linux mainline master 7eef7e306d3c40a0c5b9ff6adc9b273cc894dbd5.
  Good: 9f16d5e6f220661f73b36a4be1b21575651d8833
  Bad:  7eef7e306d3c40a0c5b9ff6adc9b273cc894dbd5

arm64:
  build:
    * gcc-8-lkftconfig-hardening
    * gcc-13-lkftconfig-hardening

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

Build error:
---------
In function 'sized_strscpy',
    inlined from '__audit_ptrace' at kernel/auditsc.c:2732:2:
include/linux/fortify-string.h:293:17: error: call to
'__write_overflow' declared with attribute error: detected write
beyond size of object (1st parameter)
  293 |                 __write_overflow();
      |                 ^~~~~~~~~~~~~~~~~~
In function 'sized_strscpy',
    inlined from 'audit_signal_info_syscall' at kernel/auditsc.c:2759:3:
include/linux/fortify-string.h:293:17: error: call to
'__write_overflow' declared with attribute error: detected write
beyond size of object (1st parameter)
  293 |                 __write_overflow();
      |                 ^~~~~~~~~~~~~~~~~~
make[4]: *** [scripts/Makefile.build:229: kernel/auditsc.o] Error 1

Build image:
-----------
- https://storage.tuxsuite.com/public/linaro/lkft/builds/2pNLRwWNgNgfh4C67CGISDtalxY/
- https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.12-9567-g7eef7e306d3c/testrun/26066025/suite/build/test/gcc-13-lkftconfig-hardening/log
- https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.12-9567-g7eef7e306d3c/testrun/26066025/suite/build/test/gcc-13-lkftconfig-hardening/details/
- https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.12-9567-g7eef7e306d3c/testrun/26066025/suite/build/test/gcc-13-lkftconfig-hardening/history/

Steps to reproduce:
------------
- # tuxmake --runtime podman --target-arch arm64 --toolchain gcc-13 \
--kconfig defconfig \
--kconfig-add https://gitlab.com/Linaro/lkft/kernel-fragments/-/raw/main/netdev.config
\
--kconfig-add hardening.config

metadata:
----
  git describe: v6.12-9567-g7eef7e306d3c
  git repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
  git sha: 7eef7e306d3c40a0c5b9ff6adc9b273cc894dbd5
  kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2pNLRwWNgNgfh4C67CGISDtalxY/config
  build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2pNLRwWNgNgfh4C67CGISDtalxY/
  toolchain: gcc-13 and gcc-8
  config: hardening.config
  arch: arm64

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