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Subjectdrivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:127:25: warning: 'strncpy' specified bound depends on the length of the source argument
Hi Huazhong,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 5af6ce7049365952f7f023155234fe091693ead1
commit: 77e9184869c9fb00a482357ea8eef3bd7ae3d45a net: hns3: refactor dump bd info of debugfs
date: 1 year, 9 months ago
config: alpha-allmodconfig (https://download.01.org/0day-ci/archive/20230129/202301290217.W2iKgXb9-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 12.1.0
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/torvalds/linux.git/commit/?id=77e9184869c9fb00a482357ea8eef3bd7ae3d45a
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 77e9184869c9fb00a482357ea8eef3bd7ae3d45a
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash drivers/net/ethernet/hisilicon/hns3/ fs/nfsd/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

In function 'hns3_dbg_fill_content',
inlined from 'hns3_dbg_rx_bd_info' at drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:358:2:
>> drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:127:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation]
127 | strncpy(pos, items[i].name, strlen(items[i].name));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function 'hns3_dbg_fill_content',
inlined from 'hns3_dbg_rx_bd_info' at drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:367:3:
drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:125:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation]
125 | strncpy(pos, result[i], strlen(result[i]));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function 'hns3_dbg_fill_content',
inlined from 'hns3_dbg_tx_bd_info' at drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:432:2:
>> drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:127:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation]
127 | strncpy(pos, items[i].name, strlen(items[i].name));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function 'hns3_dbg_fill_content',
inlined from 'hns3_dbg_tx_bd_info' at drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:441:3:
drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c:125:25: warning: 'strncpy' specified bound depends on the length of the source argument [-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
> 127 strncpy(pos, items[i].name, strlen(items[i].name));
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
https://github.com/intel/lkp-tests

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