Hi Vincent, kernel test robot noticed the following build errors:
[auto build test ERROR on 9d89551994a430b50c4fffcb1e617a057fa76e20] url: https://github.com/intel-lab-lkp/linux/commits/Vincent-Mailhol/fortify-turn-strlen-into-an-inline-function-using-__builtin_constant_p/20250108-223159 base: 9d89551994a430b50c4fffcb1e617a057fa76e20 patch link: https://lore.kernel.org/r/20250108-strlen_use_builtin_constant_p-v1-1-611b52e80a9f%40wanadoo.fr patch subject: [PATCH] fortify: turn strlen() into an inline function using __builtin_constant_p() config: x86_64-randconfig-001-20250109 (https://download.01.org/0day-ci/archive/20250109/202501092158.gp5vnozy-...@intel.com/config) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250109/202501092158.gp5vnozy-...@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 | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202501092158.gp5vnozy-...@intel.com/ All errors (new ones prefixed by >>): In file included from scripts/mod/devicetable-offsets.c:3: In file included from include/linux/mod_devicetable.h:14: In file included from include/linux/uuid.h:11: In file included from include/linux/string.h:389: >> include/linux/fortify-string.h:272:17: error: redeclaration of 'strlen' must >> not have the 'overloadable' attribute 272 | __kernel_size_t strlen(const char *p) | ^ include/linux/string.h:200:24: note: previous unmarked overload of function is here 200 | extern __kernel_size_t strlen(const char *); | ^ 1 error generated. make[3]: *** [scripts/Makefile.build:102: scripts/mod/devicetable-offsets.s] Error 1 shuffle=1556232066 make[3]: Target 'scripts/mod/' not remade because of errors. make[2]: *** [Makefile:1262: prepare0] Error 2 shuffle=1556232066 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:251: __sub-make] Error 2 shuffle=1556232066 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:251: __sub-make] Error 2 shuffle=1556232066 make: Target 'prepare' not remade because of errors. vim +272 include/linux/fortify-string.h 257 258 /** 259 * strlen - Return count of characters in a NUL-terminated string 260 * 261 * @p: pointer to NUL-terminated string to count. 262 * 263 * Do not use this function unless the string length is known at 264 * compile-time. When @p is unterminated, this function may crash 265 * or return unexpected counts that could lead to memory content 266 * exposures. Prefer strnlen(). 267 * 268 * Returns number of characters in @p (NOT including the final NUL). 269 * 270 */ 271 __FORTIFY_INLINE __diagnose_as(__builtin_strlen, 1) > 272 __kernel_size_t strlen(const char *p) 273 { 274 if (__builtin_constant_p(__builtin_strlen(p))) 275 return __builtin_strlen(p); 276 return __fortify_strlen(p); 277 } 278 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
