[arnd-playground:warnings-2 5/9] drivers/opp/debugfs.c:43:42: warning: '%.62s' directive argument is null

[arnd-playground:warnings-2 5/9] drivers/opp/debugfs.c:43:42: warning: '%.62s' directive argument is null

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git warnings-2
head:   5ddc13aed5c9ee03dd6bad7254a5918e6f36f1fa
commit: 707697efa19c54618ea9271158661fa31b4d7461 [5/9] extrawarn: enable format and stringop overflow warnings in W=1
config: um-randconfig-r031-20230811 (https://download.01.org/0day-ci/archive/20230812/202308120043.oZBsNtYV-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230812/202308120043.oZBsNtYV-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/oe-kbuild-all/202308120043.oZBsNtYV-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/opp/debugfs.c: In function 'bw_name_read':
>> drivers/opp/debugfs.c:43:42: warning: '%.62s' directive argument is null [-Wformat-overflow=]
      43 |         i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));
         |                                          ^~~~~


vim +43 drivers/opp/debugfs.c

deaa51465105a7 drivers/base/power/opp/debugfs.c Viresh Kumar 2015-11-11  35  
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  36  static ssize_t bw_name_read(struct file *fp, char __user *userbuf,
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  37  			    size_t count, loff_t *ppos)
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  38  {
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  39  	struct icc_path *path = fp->private_data;
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  40  	char buf[64];
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  41  	int i;
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  42  
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18 @43  	i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  44  
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  45  	return simple_read_from_buffer(userbuf, count, ppos, buf, i);
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  46  }
0430b1d5704b0f drivers/opp/debugfs.c            Viresh Kumar 2020-05-18  47  

:::::: The code at line 43 was first introduced by commit
:::::: 0430b1d5704b0f0f1d237236dde9c143f8669e49 opp: Expose bandwidth information via debugfs

:::::: TO: Viresh Kumar <viresh.kumar@linaro.org>
:::::: CC: Viresh Kumar <viresh.kumar@linaro.org>

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