tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git crypto-krb5 head: 355656a6fe584cb0b68ebc1ca2e56be073b706d0 commit: 077cafc75481bb885a6b044a03c73441e2aeef6f [25/35] crypto/krb5: Implement crypto self-testing config: sh-allmodconfig (attached as .config) compiler: sh4-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/dhowells/linux-fs.git/com... git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git git fetch --no-tags dhowells-fs crypto-krb5 git checkout 077cafc75481bb885a6b044a03c73441e2aeef6f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh 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 >>): crypto/krb5/selftest.c: In function 'krb5_load_enc_buf': 304 | unsigned int conf_len, pad_len, enc_len, ct_len; | ^~~~~~~ vim +/pad_len +304 crypto/krb5/selftest.c 295 296 /* 297 * Generate a buffer containing encryption test data. 298 */ 299 static int krb5_load_enc_buf(const struct krb5_enc_test *test, 300 const struct krb5_buffer *plain, 301 void *buf) 302 { 303 const struct krb5_enctype *krb5 = test->krb5; 305 int ret; 306 307 conf_len = strlen(test->conf); 308 if (VALID((conf_len & 1) || conf_len / 2 != krb5->conf_len)) 309 return -EINVAL; 310 311 if (krb5->pad) { 312 enc_len = round_up(krb5->conf_len + plain->len, krb5->block_len); 313 pad_len = enc_len - (krb5->conf_len + plain->len); 314 } else { 315 enc_len = krb5->conf_len + plain->len; 316 pad_len = 0; 317 } 318 319 ct_len = strlen(test->ct); 320 if (VALID((ct_len & 1) || ct_len / 2 != enc_len + krb5->cksum_len)) 321 return -EINVAL; 322 ct_len = enc_len + krb5->cksum_len; 323 324 if ((ret = hex2bin(buf, test->conf, krb5->conf_len)) < 0) 325 return ret; 326 buf += krb5->conf_len; 327 memcpy(buf, plain->data, plain->len); 328 return 0; 329 } 330 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org