[android-common:android15-6.6-2025-07 1/1] include/linux/fortify-string.h:65:29: warning: '__builtin_strcpy' source argument is the same as destination

[android-common:android15-6.6-2025-07 1/1] include/linux/fortify-string.h:65:29: warning: '__builtin_strcpy' source argument is the same as destination

[kernel test robot]

Hi Arnd,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android15-6.6-2025-07
head:   0b83df25061997edd38f428e499ba63b89abe733
commit: 26030cb984dd65e0cb2d0c2489d94941cf8897b4 [1/1] extrawarn: move -Wrestrict into W=1 warnings
config: arm-randconfig-002-20260611 (https://download.01.org/0day-ci/archive/20260612/202606120008.0PEOssID-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260612/202606120008.0PEOssID-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: 26030cb984dd ("extrawarn: move -Wrestrict into W=1 warnings")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606120008.0PEOssID-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/string.h:254,
                    from include/linux/bitmap.h:11,
                    from include/linux/cpumask.h:12,
                    from include/linux/mm_types_task.h:14,
                    from include/linux/mm_types.h:5,
                    from include/linux/buildid.h:5,
                    from include/linux/kallsyms.h:10,
                    from kernel/kallsyms.c:15:
   kernel/kallsyms.c: In function '__sprint_symbol':
>> include/linux/fortify-string.h:65:29: warning: '__builtin_strcpy' source argument is the same as destination [-Wrestrict]
      65 | #define __underlying_strcpy __builtin_strcpy
         |                             ^
   include/linux/fortify-string.h:794:10: note: in expansion of macro '__underlying_strcpy'
     794 |   return __underlying_strcpy(p, q);
         |          ^~~~~~~~~~~~~~~~~~~


vim +/__builtin_strcpy +65 include/linux/fortify-string.h

78a498c3a227f2 Alexander Potapenko 2022-10-24  61  
78a498c3a227f2 Alexander Potapenko 2022-10-24  62  #define __underlying_memchr	__builtin_memchr
78a498c3a227f2 Alexander Potapenko 2022-10-24  63  #define __underlying_memcmp	__builtin_memcmp
a28a6e860c6cf2 Francis Laniel      2021-02-25  64  #define __underlying_strcat	__builtin_strcat
a28a6e860c6cf2 Francis Laniel      2021-02-25 @65  #define __underlying_strcpy	__builtin_strcpy
a28a6e860c6cf2 Francis Laniel      2021-02-25  66  #define __underlying_strlen	__builtin_strlen
a28a6e860c6cf2 Francis Laniel      2021-02-25  67  #define __underlying_strncat	__builtin_strncat
a28a6e860c6cf2 Francis Laniel      2021-02-25  68  #define __underlying_strncpy	__builtin_strncpy
a28a6e860c6cf2 Francis Laniel      2021-02-25  69  #endif
a28a6e860c6cf2 Francis Laniel      2021-02-25  70  

:::::: The code at line 65 was first introduced by commit
:::::: a28a6e860c6cf231cf3c5171c75c342adcd00406 string.h: move fortified functions definitions in a dedicated header.

:::::: TO: Francis Laniel <laniel_francis@privacyrequired.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki