Hi Stefan, Thank you for the patch! Yet something to improve: [auto build test ERROR on cryptodev/master] [also build test ERROR on crypto/master security/next-testing v5.11-rc7 next-20210125] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Stefan-Berger/Add-support-for-x5... base: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master config: x86_64-randconfig-a011-20200911 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/6e1523b0e77785c263bcb639b87a862ae... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stefan-Berger/Add-support-for-x509-certs-with-NIST-p256-and-p192-keys/20210201-232803 git checkout 6e1523b0e77785c263bcb639b87a862ae59731a4 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: crypto/asymmetric_keys/public_key.o: in function `software_key_determine_akcipher': vim +97 crypto/asymmetric_keys/public_key.c 61 62 /* 63 * Determine the crypto algorithm name. 64 */ 65 static 66 int software_key_determine_akcipher(const char *encoding, 67 const char *hash_algo, 68 const struct public_key *pkey, 69 char alg_name[CRYPTO_MAX_ALG_NAME]) 70 { 71 int n; 72 73 if (strcmp(encoding, "pkcs1") == 0) { 74 /* The data wangled by the RSA algorithm is typically padded 75 * and encoded in some manner, such as EMSA-PKCS1-1_5 [RFC3447 76 * sec 8.2]. 77 */ 78 if (!hash_algo) 79 n = snprintf(alg_name, CRYPTO_MAX_ALG_NAME, 80 "pkcs1pad(%s)", 81 pkey->pkey_algo); 82 else 83 n = snprintf(alg_name, CRYPTO_MAX_ALG_NAME, 84 "pkcs1pad(%s,%s)", 85 pkey->pkey_algo, hash_algo); 86 return n >= CRYPTO_MAX_ALG_NAME ? -EINVAL : 0; 87 } 88 89 if (strcmp(encoding, "raw") == 0) { 90 strcpy(alg_name, pkey->pkey_algo); 91 return 0; 92 } 93 94 if (strcmp(encoding, "x962") == 0) { 95 enum OID oid; 96 98 return -EBADMSG; 99 100 switch (oid) { 101 case OID_id_prime192v1: 102 strcpy(alg_name, "ecdsa-nist-p192"); 103 return 0; 104 case OID_id_prime256v1: 105 strcpy(alg_name, "ecdsa-nist-p256"); 106 return 0; 107 default: 108 return -EINVAL; 109 } 110 } 111 112 return -ENOPKG; 113 } 114 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org