drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:90:25: warning: 'strncpy' specified bound depends on the length of the source argument

From: kernel test robot
Date: Fri Aug 13 2021 - 11:44:36 EST


tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: f8e6dfc64f6135d1b6c5215c14cd30b9b60a0008
commit: 1556ea9120ffcf4faf7ac6b62a6e28216f260a23 net: hns3: refactor dump mac list of debugfs
date: 3 months ago
config: sparc-allyesconfig (attached as .config)
compiler: sparc64-linux-gcc (GCC) 11.2.0
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=1556ea9120ffcf4faf7ac6b62a6e28216f260a23
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 1556ea9120ffcf4faf7ac6b62a6e28216f260a23
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=sparc

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

All warnings (new ones prefixed by >>):

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c: In function 'hclge_dbg_fill_content.constprop':
>> drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:90:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation]
90 | strncpy(pos, items[i].name, strlen(items[i].name));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:88:25: warning: 'strncpy' specified bound depends on the length of the source argument [-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
> 90 strncpy(pos, items[i].name, strlen(items[i].name));
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@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip