Hi Thara, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on cryptodev/master] [also build test WARNING on next-20210421] [cannot apply to crypto/master v5.12-rc8] [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/Thara-Gopinath/Add-support-for-AEAD-algorithms-in-Qualcomm-Crypto-Engine-driver/20210420-113944 base: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master config: x86_64-randconfig-a013-20210421 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d87b9b81ccb95217181ce75515c6c68bbb408ca4) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/b152c1b17bb6ad7923f0f3f8bc5ef81fb4cd054a git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Thara-Gopinath/Add-support-for-AEAD-algorithms-in-Qualcomm-Crypto-Engine-driver/20210420-113944 git checkout b152c1b17bb6ad7923f0f3f8bc5ef81fb4cd054a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/crypto/qce/common.c:478:14: warning: variable 'auth_ivsize' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] } else if (IS_SHA256_HMAC(rctx->flags)) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/crypto/qce/common.h:68:32: note: expanded from macro 'IS_SHA256_HMAC' #define IS_SHA256_HMAC(flags) (flags & QCE_HASH_SHA256_HMAC) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/crypto/qce/common.c:482:18: note: uninitialized use occurs here authiv_words = auth_ivsize / sizeof(u32); ^~~~~~~~~~~ drivers/crypto/qce/common.c:478:10: note: remove the 'if' if its condition is always true } else if (IS_SHA256_HMAC(rctx->flags)) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/crypto/qce/common.c:434:26: note: initialize the variable 'auth_ivsize' to silence this warning unsigned int auth_ivsize; ^ = 0 1 warning generated. vim +478 drivers/crypto/qce/common.c 418 419 static int qce_setup_regs_aead(struct crypto_async_request *async_req) 420 { 421 struct aead_request *req = aead_request_cast(async_req); 422 struct qce_aead_reqctx *rctx = aead_request_ctx(req); 423 struct qce_aead_ctx *ctx = crypto_tfm_ctx(async_req->tfm); 424 struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req)); 425 struct qce_device *qce = tmpl->qce; 426 u32 enckey[QCE_MAX_CIPHER_KEY_SIZE / sizeof(u32)] = {0}; 427 u32 enciv[QCE_MAX_IV_SIZE / sizeof(u32)] = {0}; 428 u32 authkey[QCE_SHA_HMAC_KEY_SIZE / sizeof(u32)] = {0}; 429 u32 authiv[SHA256_DIGEST_SIZE / sizeof(u32)] = {0}; 430 u32 authnonce[QCE_MAX_NONCE / sizeof(u32)] = {0}; 431 unsigned int enc_keylen = ctx->enc_keylen; 432 unsigned int auth_keylen = ctx->auth_keylen; 433 unsigned int enc_ivsize = rctx->ivsize; 434 unsigned int auth_ivsize; 435 unsigned int enckey_words, enciv_words; 436 unsigned int authkey_words, authiv_words, authnonce_words; 437 unsigned long flags = rctx->flags; 438 u32 encr_cfg, auth_cfg, config, totallen; 439 u32 iv_last_word; 440 441 qce_setup_config(qce); 442 443 /* Write encryption key */ 444 enckey_words = qce_be32_to_cpu_array(enckey, ctx->enc_key, enc_keylen); 445 qce_write_array(qce, REG_ENCR_KEY0, enckey, enckey_words); 446 447 /* Write encryption iv */ 448 enciv_words = qce_be32_to_cpu_array(enciv, rctx->iv, enc_ivsize); 449 qce_write_array(qce, REG_CNTR0_IV0, enciv, enciv_words); 450 451 if (IS_CCM(rctx->flags)) { 452 iv_last_word = enciv[enciv_words - 1]; 453 qce_write(qce, REG_CNTR3_IV3, iv_last_word + 1); 454 qce_write_array(qce, REG_ENCR_CCM_INT_CNTR0, (u32 *)enciv, enciv_words); 455 qce_write(qce, REG_CNTR_MASK, ~0); 456 qce_write(qce, REG_CNTR_MASK0, ~0); 457 qce_write(qce, REG_CNTR_MASK1, ~0); 458 qce_write(qce, REG_CNTR_MASK2, ~0); 459 } 460 461 /* Clear authentication IV and KEY registers of previous values */ 462 qce_clear_array(qce, REG_AUTH_IV0, 16); 463 qce_clear_array(qce, REG_AUTH_KEY0, 16); 464 465 /* Clear byte count */ 466 qce_clear_array(qce, REG_AUTH_BYTECNT0, 4); 467 468 /* Write authentication key */ 469 authkey_words = qce_be32_to_cpu_array(authkey, ctx->auth_key, auth_keylen); 470 qce_write_array(qce, REG_AUTH_KEY0, (u32 *)authkey, authkey_words); 471 472 /* Write initial authentication IV only for HMAC algorithms */ 473 if (IS_SHA_HMAC(rctx->flags)) { 474 /* Write default authentication iv */ 475 if (IS_SHA1_HMAC(rctx->flags)) { 476 auth_ivsize = SHA1_DIGEST_SIZE; 477 memcpy(authiv, std_iv_sha1, auth_ivsize); > 478 } else if (IS_SHA256_HMAC(rctx->flags)) { 479 auth_ivsize = SHA256_DIGEST_SIZE; 480 memcpy(authiv, std_iv_sha256, auth_ivsize); 481 } 482 authiv_words = auth_ivsize / sizeof(u32); 483 qce_write_array(qce, REG_AUTH_IV0, (u32 *)authiv, authiv_words); 484 } else if (IS_CCM(rctx->flags)) { 485 /* Write nonce for CCM algorithms */ 486 authnonce_words = qce_be32_to_cpu_array(authnonce, rctx->ccm_nonce, QCE_MAX_NONCE); 487 qce_write_array(qce, REG_AUTH_INFO_NONCE0, authnonce, authnonce_words); 488 } 489 490 /* Set up ENCR_SEG_CFG */ 491 encr_cfg = qce_encr_cfg(flags, enc_keylen); 492 if (IS_ENCRYPT(flags)) 493 encr_cfg |= BIT(ENCODE_SHIFT); 494 qce_write(qce, REG_ENCR_SEG_CFG, encr_cfg); 495 496 /* Set up AUTH_SEG_CFG */ 497 auth_cfg = qce_auth_cfg(rctx->flags, auth_keylen, ctx->authsize); 498 auth_cfg |= BIT(AUTH_LAST_SHIFT); 499 auth_cfg |= BIT(AUTH_FIRST_SHIFT); 500 if (IS_ENCRYPT(flags)) { 501 if (IS_CCM(rctx->flags)) 502 auth_cfg |= AUTH_POS_BEFORE << AUTH_POS_SHIFT; 503 else 504 auth_cfg |= AUTH_POS_AFTER << AUTH_POS_SHIFT; 505 } else { 506 if (IS_CCM(rctx->flags)) 507 auth_cfg |= AUTH_POS_AFTER << AUTH_POS_SHIFT; 508 else 509 auth_cfg |= AUTH_POS_BEFORE << AUTH_POS_SHIFT; 510 } 511 qce_write(qce, REG_AUTH_SEG_CFG, auth_cfg); 512 513 totallen = rctx->cryptlen + rctx->assoclen; 514 515 /* Set the encryption size and start offset */ 516 if (IS_CCM(rctx->flags) && IS_DECRYPT(rctx->flags)) 517 qce_write(qce, REG_ENCR_SEG_SIZE, rctx->cryptlen + ctx->authsize); 518 else 519 qce_write(qce, REG_ENCR_SEG_SIZE, rctx->cryptlen); 520 qce_write(qce, REG_ENCR_SEG_START, rctx->assoclen & 0xffff); 521 522 /* Set the authentication size and start offset */ 523 qce_write(qce, REG_AUTH_SEG_SIZE, totallen); 524 qce_write(qce, REG_AUTH_SEG_START, 0); 525 526 /* Write total length */ 527 if (IS_CCM(rctx->flags) && IS_DECRYPT(rctx->flags)) 528 qce_write(qce, REG_SEG_SIZE, totallen + ctx->authsize); 529 else 530 qce_write(qce, REG_SEG_SIZE, totallen); 531 532 /* get little endianness */ 533 config = qce_config_reg(qce, 1); 534 qce_write(qce, REG_CONFIG, config); 535 536 /* Start the process */ 537 qce_crypto_go(qce, !IS_CCM(flags)); 538 539 return 0; 540 } 541 #endif 542 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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