tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git rxrpc-rxgk head: 4a2514097a3f7a76bce42c636d4cf8b5a9cd4787 commit: 4a2514097a3f7a76bce42c636d4cf8b5a9cd4787 [8/8] rxrpc: Implement the yfs-rxgk transport class (security index 6) 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 git checkout 4a2514097a3f7a76bce42c636d4cf8b5a9cd4787 # 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 >>): net/rxrpc/rxgk-kdf.c:364:5: warning: no previous prototype for 'rxgk_calc_DK' [-Wmissing-prototypes] 364 | int rxgk_calc_DK(const struct rxgk_krb5_enctype *gk5e, | ^~~~~~~~~~~~ 876 | int rxgk_set_up_token_cipher(const struct rxgk_buffer *server_key, | ^~~~~~~~~~~~~~~~~~~~~~~~ # 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 rxrpc-rxgk git checkout 4a2514097a3f7a76bce42c636d4cf8b5a9cd4787 vim +/rxgk_set_up_token_cipher +876 net/rxrpc/rxgk-kdf.c 871 872 /* 873 * Use the server secret key to set up the ciphers that will be used to extract 874 * the token from a response packet. 875 */ 877 struct rxgk_enc_keys *token_key, 878 unsigned int enctype, 879 gfp_t gfp) 880 { 881 const struct rxgk_krb5_enctype *gk5e; 882 struct rxgk_buffer key; 883 int ret; 884 u8 *buffer; 885 886 gk5e = rxgk_find_enctype(enctype); 887 if (!gk5e) 888 return -ENOPKG; 889 890 buffer = kzalloc(gk5e->keybytes, gfp); 891 if (!buffer) 892 return -ENOMEM; 893 894 key.len = gk5e->keybytes; 895 key.data = buffer; 896 897 DERIVE_SKCIPHER(server_key, rxgk_const_token_Ke, &token_key->Ke); 898 DERIVE_HMAC (server_key, rxgk_const_token_Ki, &token_key->Ki); 899 900 kfree(buffer); 901 return 0; 902 903 out: 904 kfree(buffer); 905 if (token_key->Ke) 906 crypto_free_sync_skcipher(token_key->Ke); 907 if (token_key->Ki) 908 crypto_free_shash(token_key->Ki); 909 token_key->Ke = NULL; 910 token_key->Ki = NULL; 911 return ret; 912 } 913 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org