tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: 77091933e453a258bbe9ff2aeb1c8d6fc1db7ef9 commit: 1556ea9120ffcf4faf7ac6b62a6e28216f260a23 [75/126] net: hns3: refactor dump mac list of debugfs config: ia64-allmodconfig (attached as .config) compiler: ia64-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://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit... git remote add net-next https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git git fetch --no-tags net-next master git checkout 1556ea9120ffcf4faf7ac6b62a6e28216f260a23 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c: In function 'hclge_dbg_fill_content.constprop': 90 | strncpy(pos, items[i].name, strlen(items[i].name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:88:4: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation] 88 | strncpy(pos, result[i], strlen(result[i])); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/strncpy +90 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c 77 78 static void hclge_dbg_fill_content(char *content, u16 len, 79 const struct hclge_dbg_item *items, 80 const char **result, u16 size) 81 { 82 char *pos = content; 83 u16 i; 84 85 memset(content, ' ', len); 86 for (i = 0; i < size; i++) { 87 if (result) 88 strncpy(pos, result[i], strlen(result[i])); 89 else 91 pos += strlen(items[i].name) + items[i].interval; 92 } 93 *pos++ = '\n'; 94 *pos++ = '\0'; 95 } 96 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org