Hi Jian, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9b43a525db125799df81e6fbef712a2ae50bfc5d commit: 0ca821da86a5ec24eb2ece24fe87e5bf518c5939 net: hns3: add debugfs support for vlan configuration date: 1 year, 7 months ago config: csky-allmodconfig compiler: csky-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=0ca821da86a5ec24eb2ece24fe87e5bf518c5939 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 0ca821da86a5ec24eb2ece24fe87e5bf518c5939 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=csky olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All warnings (new ones prefixed by >>): In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_vlan_filter_config.constprop' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:2080:2: drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:92:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation] 92 | strncpy(pos, items[i].name, strlen(items[i].name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_vlan_filter_config.constprop' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:2102:3: >> drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:90:25: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation] 90 | strncpy(pos, result[i], strlen(result[i])); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_mac_list' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:1872:2: drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:92:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation] 92 | strncpy(pos, items[i].name, strlen(items[i].name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_mac_list' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:1887:4: 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, result[i], strlen(result[i])); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_tm_pg' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:735:2: drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:92:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation] 92 | strncpy(pos, items[i].name, strlen(items[i].name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_tm_pg' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:775:3: 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, result[i], strlen(result[i])); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_tm_qset' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:1027:2: drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:92:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation] 92 | strncpy(pos, items[i].name, strlen(items[i].name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_tm_qset' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:1059:3: 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, result[i], strlen(result[i])); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_vlan_offload_config' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:2123:2: drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:92:25: warning: 'strncpy' specified bound depends on the length of the source argument [-Wstringop-truncation] 92 | strncpy(pos, items[i].name, strlen(items[i].name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'hclge_dbg_fill_content', inlined from 'hclge_dbg_dump_vlan_offload_config' at drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:2154:3: >> drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c:90:25: warning: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation] 90 | strncpy(pos, result[i], strlen(result[i])); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for LOCKDEP Depends on [n]: DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y] && (FRAME_POINTER [=n] || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86) Selected by [y]: - PROVE_LOCKING [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y] - LOCK_STAT [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y] - DEBUG_LOCK_ALLOC [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y] vim +/strncpy +90 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c a582b78dfc33d2 Zhongzhu Liu 2019-08-28 79 1556ea9120ffcf Huazhong Tan 2021-05-14 80 static void hclge_dbg_fill_content(char *content, u16 len, 1556ea9120ffcf Huazhong Tan 2021-05-14 81 const struct hclge_dbg_item *items, 1556ea9120ffcf Huazhong Tan 2021-05-14 82 const char **result, u16 size) 1556ea9120ffcf Huazhong Tan 2021-05-14 83 { 1556ea9120ffcf Huazhong Tan 2021-05-14 84 char *pos = content; 1556ea9120ffcf Huazhong Tan 2021-05-14 85 u16 i; 1556ea9120ffcf Huazhong Tan 2021-05-14 86 1556ea9120ffcf Huazhong Tan 2021-05-14 87 memset(content, ' ', len); 1556ea9120ffcf Huazhong Tan 2021-05-14 88 for (i = 0; i < size; i++) { 1556ea9120ffcf Huazhong Tan 2021-05-14 89 if (result) 1556ea9120ffcf Huazhong Tan 2021-05-14 @90 strncpy(pos, result[i], strlen(result[i])); 1556ea9120ffcf Huazhong Tan 2021-05-14 91 else 1556ea9120ffcf Huazhong Tan 2021-05-14 92 strncpy(pos, items[i].name, strlen(items[i].name)); 1556ea9120ffcf Huazhong Tan 2021-05-14 93 pos += strlen(items[i].name) + items[i].interval; 1556ea9120ffcf Huazhong Tan 2021-05-14 94 } 1556ea9120ffcf Huazhong Tan 2021-05-14 95 *pos++ = '\n'; 1556ea9120ffcf Huazhong Tan 2021-05-14 96 *pos++ = '\0'; 1556ea9120ffcf Huazhong Tan 2021-05-14 97 } 1556ea9120ffcf Huazhong Tan 2021-05-14 98 :::::: The code at line 90 was first introduced by commit :::::: 1556ea9120ffcf4faf7ac6b62a6e28216f260a23 net: hns3: refactor dump mac list of debugfs :::::: TO: Huazhong Tan :::::: CC: David S. Miller -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests