tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: 77091933e453a258bbe9ff2aeb1c8d6fc1db7ef9 commit: 77e9184869c9fb00a482357ea8eef3bd7ae3d45a [74/126] net: hns3: refactor dump bd info 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 77e9184869c9fb00a482357ea8eef3bd7ae3d45a # 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/hns3_debugfs.c: In function 'hns3_dbg_fill_content.constprop': 127 | strncpy(pos, items[i].name, strlen(items[i].name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:125:4: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation] 125 | strncpy(pos, result[i], strlen(result[i])); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/strncpy +127 drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c 114 115 static void hns3_dbg_fill_content(char *content, u16 len, 116 const struct hns3_dbg_item *items, 117 const char **result, u16 size) 118 { 119 char *pos = content; 120 u16 i; 121 122 memset(content, ' ', len); 123 for (i = 0; i < size; i++) { 124 if (result) 125 strncpy(pos, result[i], strlen(result[i])); 126 else 128 129 pos += strlen(items[i].name) + items[i].interval; 130 } 131 132 *pos++ = '\n'; 133 *pos++ = '\0'; 134 } 135 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org