linux-hardening - [PROBLEM] randconfig: ./include/linux/fortify-string.h:122:33: error: ‘__builtin_strcpy’ source argument is the same as destination [-Werror=restrict]

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Message-ID: <f2d1425e-dc7d-444f-ba8d-4aac0c8fc882@gmail.com>
Date: Thu, 27 Jun 2024 20:25:01 +0200
From: Mirsad Todorovac <mtodorovac69@...il.com>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc: Linux Kernel Build System <linux-kbuild@...r.kernel.org>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Will Deacon <will@...nel.org>, Waiman Long <longman@...hat.com>,
 Boqun Feng <boqun.feng@...il.com>, Thomas Gleixner <tglx@...utronix.de>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, Kees Cook
 <kees@...nel.org>, Andy Shevchenko <andy@...nel.org>,
 Yonghong Song <yonghong.song@...ux.dev>, Song Liu <song@...nel.org>,
 Nick Desaulniers <ndesaulniers@...gle.com>,
 Zhen Lei <thunder.leizhen@...wei.com>, Ard Biesheuvel <ardb@...nel.org>,
 Xin Li <xin3.li@...el.com>, Michael Roth <michael.roth@....com>,
 linux-mm@...ck.org, linux-hardening@...r.kernel.org
Subject: [PROBLEM] randconfig: ./include/linux/fortify-string.h:122:33: error: ‘__builtin_strcpy’ source argument is the same as destination [-Werror=restrict]

Hi all,

I hope it will catch your attention, for I couldn't sort out what is wrong with this:

KCONFIG_SEED=0xD859674

on vanilla torvalds tree, commit v6.10-rc4-366-gafcd48134c58

_______________________________________________________________
$ time nice make -j 36 bindeb-pkg |& tee ../err-6.10-rc5-08.log; date
  GEN     debian
dpkg-buildpackage --build=binary --no-pre-clean --unsigned-changes -R'make -f debian/rules' -j1 -a$(cat debian/arch)
dpkg-buildpackage: info: source package linux-upstream
dpkg-buildpackage: info: source version 6.10.0-rc5-gafcd48134c58-34
dpkg-buildpackage: info: source distribution jammy
dpkg-buildpackage: info: source changed by marvin <marvin@...iant>
dpkg-architecture: warning: specified GNU system type i686-linux-gnu does not match CC system type x86_64-linux-gnu, try setting a correct CC environment variable
 dpkg-source --before-build .
dpkg-buildpackage: info: host architecture i386
 make -f debian/rules binary
#
# No change to .config
#
  CALL    scripts/checksyscalls.sh
  UPD     init/utsversion-tmp.h
  CC      init/version.o
  AR      init/built-in.a
  CC      kernel/kallsyms.o
In file included from ./include/linux/string.h:374,
                 from ./arch/x86/include/asm/page_32.h:18,
                 from ./arch/x86/include/asm/page.h:14,
                 from ./arch/x86/include/asm/thread_info.h:12,
                 from ./include/linux/thread_info.h:60,
                 from ./include/linux/spinlock.h:60,
                 from ./include/linux/mmzone.h:8,
                 from ./include/linux/gfp.h:7,
                 from ./include/linux/mm.h:7,
                 from ./include/linux/kallsyms.h:13,
                 from kernel/kallsyms.c:15:
kernel/kallsyms.c: In function ‘__sprint_symbol’:
./include/linux/fortify-string.h:122:33: error: ‘__builtin_strcpy’ source argument is the same as destination [-Werror=restrict]
  122 | #define __underlying_strcpy     __builtin_strcpy
      |                                 ^
./include/linux/fortify-string.h:787:24: note: in expansion of macro ‘__underlying_strcpy’
  787 |                 return __underlying_strcpy(p, q);
      |                        ^~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[6]: *** [scripts/Makefile.build:244: kernel/kallsyms.o] Error 1
make[5]: *** [scripts/Makefile.build:485: kernel] Error 2
make[4]: *** [Makefile:1934: .] Error 2
make[3]: *** [debian/rules:74: build-arch] Error 2
dpkg-buildpackage: error: make -f debian/rules binary subprocess returned exit status 2
make[2]: *** [scripts/Makefile.package:121: bindeb-pkg] Error 2
make[1]: *** [/home/marvin/linux/kernel/linux_torvalds/Makefile:1555: bindeb-pkg] Error 2
make: *** [Makefile:240: __sub-make] Error 2

real	0m2.414s
user	0m11.158s
sys	0m6.280s
Thu Jun 27 20:05:23 CEST 2024
$ 

Hope this helps.

Best regards,
Mirsad Todorovac
View attachment ".config" of type "text/plain" (137521 bytes)