Hi Andy, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.5-rc2 next-20230718] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Andy-Shevchenko/kasan-Replace-strreplace-with-strchrnul/20230628-233727 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230628153342.53406-1-andriy.shevchenko%40linux.intel.com patch subject: [PATCH v1 1/1] kasan: Replace strreplace() with strchrnul() config: x86_64-randconfig-x001-20230718 (https://download.01.org/0day-ci/archive/20230719/202307191350.tJh2PZdE-lkp@xxxxxxxxx/config) compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a) reproduce: (https://download.01.org/0day-ci/archive/20230719/202307191350.tJh2PZdE-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202307191350.tJh2PZdE-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/kasan/report_generic.c:286:3: warning: variable 'p' is uninitialized when used here [-Wuninitialized] p[strchrnul(token, ':') - token] = '\0'; ^ mm/kasan/report_generic.c:267:10: note: initialize the variable 'p' to silence this warning char *p; ^ = NULL 1 warning generated. vim +/p +286 mm/kasan/report_generic.c 242 243 static void print_decoded_frame_descr(const char *frame_descr) 244 { 245 /* 246 * We need to parse the following string: 247 * "n alloc_1 alloc_2 ... alloc_n" 248 * where alloc_i looks like 249 * "offset size len name" 250 * or "offset size len name:line". 251 */ 252 253 char token[64]; 254 unsigned long num_objects; 255 256 if (!tokenize_frame_descr(&frame_descr, token, sizeof(token), 257 &num_objects)) 258 return; 259 260 pr_err("\n"); 261 pr_err("This frame has %lu %s:\n", num_objects, 262 num_objects == 1 ? "object" : "objects"); 263 264 while (num_objects--) { 265 unsigned long offset; 266 unsigned long size; 267 char *p; 268 269 /* access offset */ 270 if (!tokenize_frame_descr(&frame_descr, token, sizeof(token), 271 &offset)) 272 return; 273 /* access size */ 274 if (!tokenize_frame_descr(&frame_descr, token, sizeof(token), 275 &size)) 276 return; 277 /* name length (unused) */ 278 if (!tokenize_frame_descr(&frame_descr, NULL, 0, NULL)) 279 return; 280 /* object name */ 281 if (!tokenize_frame_descr(&frame_descr, token, sizeof(token), 282 NULL)) 283 return; 284 285 /* Strip line number; without filename it's not very helpful. */ > 286 p[strchrnul(token, ':') - token] = '\0'; 287 288 /* Finally, print object information. */ 289 pr_err(" [%lu, %lu) '%s'", offset, offset + size, token); 290 } 291 } 292 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
