Re: [PATCH 3/3] fs: unicode: Make UTF-8 encoding loadable

[kernel test robot <lkp@xxxxxxxxx>]

Hi Shreeya,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on ext4/dev]
[also build test WARNING on f2fs/dev-test linux/master linus/master v5.12-rc2 next-20210312]
[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]

url:    https://github.com/0day-ci/linux/commits/Shreeya-Patel/Make-UTF-8-encoding-loadable/20210314-071604
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev
config: riscv-randconfig-r022-20210314 (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/85f4765787c386a4b949afaf9721046c0e85955a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Shreeya-Patel/Make-UTF-8-encoding-loadable/20210314-071604
        git checkout 85f4765787c386a4b949afaf9721046c0e85955a
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   In function 'utf8_parse_version',
       inlined from 'utf8_load' at fs/unicode/utf8mod.c:195:7:
>> fs/unicode/utf8mod.c:175:2: warning: 'strncpy' specified bound 12 equals destination size [-Wstringop-truncation]
     175 |  strncpy(version_string, version, sizeof(version_string));
         |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/strncpy +175 fs/unicode/utf8mod.c

   164	
   165	static int utf8_parse_version(const char *version, unsigned int *maj,
   166				      unsigned int *min, unsigned int *rev)
   167	{
   168		substring_t args[3];
   169		char version_string[12];
   170		static const struct match_token token[] = {
   171			{1, "%d.%d.%d"},
   172			{0, NULL}
   173		};
   174	
 > 175		strncpy(version_string, version, sizeof(version_string));
   176	
   177		if (match_token(version_string, token, args) != 1)
   178			return -EINVAL;
   179	
   180		if (match_int(&args[0], maj) || match_int(&args[1], min) ||
   181		    match_int(&args[2], rev))
   182			return -EINVAL;
   183	
   184		return 0;
   185	}
   186	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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