[kbuild-all] [linux-next:master 412/2389] fs/ksmbd/ndr.c:70:2: warning: 'strncpy' destination unchanged after copying no bytes

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b1347210b01daa977ea980268927aa99198ceccc commit: c2220322b4577fc32ad3b7b4ddb856bd1f8c7461 [412/2389] ksmbd: replace KSMBD_ALIGN with kernel ALIGN macro config: parisc-allyesconfig (attached as .config) compiler: hppa-linux-gcc (GCC) 10.3.0 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/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout c2220322b4577fc32ad3b7b4ddb856bd1f8c7461 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=parisc 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 >>): In function 'ndr_write_string', inlined from 'ndr_encode_dos_attr' at fs/ksmbd/ndr.c:136:3: 70 | strncpy(PAYLOAD_HEAD(n), value, sz); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'ndr_write_string', inlined from 'ndr_encode_dos_attr' at fs/ksmbd/ndr.c:134:3: 70 | strncpy(PAYLOAD_HEAD(n), value, sz); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/ksmbd/ndr.c: In function 'ndr_encode_dos_attr': fs/ksmbd/ndr.c:134:3: note: length computed here 134 | ndr_write_string(n, hex_attr, strlen(hex_attr)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/strncpy +70 fs/ksmbd/ndr.c e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 64 e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 65 static int ndr_write_string(struct ndr *n, void *value, size_t sz) e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 66 { e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 67 if (n->length <= n->offset + sz) e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 68 try_to_realloc_ndr_blob(n, sz); e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 69 e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 @70 strncpy(PAYLOAD_HEAD(n), value, sz); e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 71 sz++; e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 72 n->offset += sz; c2220322b4577f fs/ksmbd/ndr.c Hyunchul Lee 2021-06-25 73 n->offset = ALIGN(n->offset, 2); e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 74 return 0; e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 75 } e2f34481b24db2 fs/cifsd/ndr.c Namjae Jeon 2021-03-16 76 :::::: The code at line 70 was first introduced by commit :::::: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 cifsd: add server-side procedures for SMB3 :::::: TO: Namjae Jeon <namjae.jeon(a)samsung.com&gt; :::::: CC: Steve French <stfrench(a)microsoft.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org