[anolis-intel-cloud:devel-6.6 254/254] test_cpu_identity.c:943:62: warning: 'snprintf' output may be truncated before the last format character

[kernel test robot <lkp@intel.com>]

tree:   https://gitee.com/anolis/intel-cloud-kernel.git devel-6.6
head:   1cb14b8ebd706a55e3cb0251941355687e595e1d
commit: fdeec2f4f3f7d414eb7b9cf11360e7268bed1615 [254/254] anolis: tools/selftest: add cpu identity coverage
:::::: branch date: 20 hours ago
:::::: commit date: 3 months ago
config: x86_64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260827/202608271113.nWwO5k5V-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260827/202608271113.nWwO5k5V-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
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202608271113.nWwO5k5V-lkp@intel.com/

All warnings (new ones prefixed by >>):

   test_cpu_identity.c: In function 'test_identity_hierarchy_counts':
>> test_cpu_identity.c:943:62: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=]
     943 |         snprintf(expeller_path, sizeof(expeller_path), "%s/%s", parent_path,
         |                                                              ^
   test_cpu_identity.c:943:9: note: 'snprintf' output 2 or more bytes (assuming 4097) into a destination of size 4096
     943 |         snprintf(expeller_path, sizeof(expeller_path), "%s/%s", parent_path,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     944 |                  strrchr(expeller, '/') + 1);
         |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~
   test_cpu_identity.c:945:62: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=]
     945 |         snprintf(expellee_path, sizeof(expellee_path), "%s/%s", parent_path,
         |                                                              ^
   test_cpu_identity.c:945:9: note: 'snprintf' output 2 or more bytes (assuming 4097) into a destination of size 4096
     945 |         snprintf(expellee_path, sizeof(expellee_path), "%s/%s", parent_path,
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     946 |                  strrchr(expellee, '/') + 1);
         |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~
   test_cpu_identity.c: In function 'run_multi_child_parent_throttle_pressure':
>> test_cpu_identity.c:1555:76: warning: '/' directive output may be truncated writing 1 byte into a region of size between 0 and 4095 [-Wformat-truncation=]
    1555 |         snprintf(throttle_parent_path, sizeof(throttle_parent_path), "%s/%s/%s",
         |                                                                            ^
   test_cpu_identity.c:1555:9: note: 'snprintf' output 3 or more bytes (assuming 4098) into a destination of size 4096
    1555 |         snprintf(throttle_parent_path, sizeof(throttle_parent_path), "%s/%s/%s",
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    1556 |                  parent_path, strrchr(normal, '/') + 1, strrchr(throttle_parent, '/') + 1);
         |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   test_cpu_identity.c:1558:72: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=]
    1558 |                 snprintf(child_paths[i], sizeof(child_paths[i]), "%s/%s",
         |                                                                        ^
   test_cpu_identity.c:1558:17: note: 'snprintf' output 2 or more bytes (assuming 4097) into a destination of size 4096
    1558 |                 snprintf(child_paths[i], sizeof(child_paths[i]), "%s/%s",
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    1559 |                          throttle_parent_path, strrchr(children[i], '/') + 1);
         |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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