Re: [PATCH v4 3/3] crypto: Add Mediatek EIP-93 crypto engine support

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Hi Christian,

kernel test robot noticed the following build warnings:

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Christian-Marangi/dt-bindings-crypto-Add-Inside-Secure-SafeXcel-EIP-93-crypto-engine/20241025-175032
base:   https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
patch link:    https://lore.kernel.org/r/20241025094734.1614-3-ansuelsmth%40gmail.com
patch subject: [PATCH v4 3/3] crypto: Add Mediatek EIP-93 crypto engine support
config: csky-randconfig-r071-20241028 (https://download.01.org/0day-ci/archive/20241028/202410281155.jEN0wSbS-lkp@xxxxxxxxx/config)
compiler: csky-linux-gcc (GCC) 14.1.0

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
| Closes: https://lore.kernel.org/r/202410281155.jEN0wSbS-lkp@xxxxxxxxx/

New smatch warnings:
drivers/crypto/inside-secure/eip93/eip93-cipher.c:118 eip93_skcipher_setkey() error: uninitialized symbol 'ret'.
drivers/crypto/inside-secure/eip93/eip93-aead.c:125 eip93_aead_setkey() error: uninitialized symbol 'ret'.
drivers/crypto/inside-secure/eip93/eip93-hash.c:26 eip93_hash_free_data_blocks() error: dereferencing freed memory 'block'
drivers/crypto/inside-secure/eip93/eip93-hash.c:162 _eip93_hash_init() error: uninitialized symbol 'sa_record_hmac'.

Old smatch warnings:
drivers/crypto/inside-secure/eip93/eip93-hash.c:285 eip93_send_hash_req() error: uninitialized symbol 'crypto_async_idr'.

vim +/ret +118 drivers/crypto/inside-secure/eip93/eip93-cipher.c

883ad7684f17d2 Christian Marangi 2024-10-25   78  static int eip93_skcipher_setkey(struct crypto_skcipher *ctfm, const u8 *key,
883ad7684f17d2 Christian Marangi 2024-10-25   79  				 unsigned int len)
883ad7684f17d2 Christian Marangi 2024-10-25   80  {
883ad7684f17d2 Christian Marangi 2024-10-25   81  	struct crypto_tfm *tfm = crypto_skcipher_tfm(ctfm);
883ad7684f17d2 Christian Marangi 2024-10-25   82  	struct eip93_crypto_ctx *ctx = crypto_tfm_ctx(tfm);
883ad7684f17d2 Christian Marangi 2024-10-25   83  	struct eip93_alg_template *tmpl = container_of(tfm->__crt_alg,
883ad7684f17d2 Christian Marangi 2024-10-25   84  						     struct eip93_alg_template,
883ad7684f17d2 Christian Marangi 2024-10-25   85  						     alg.skcipher.base);
883ad7684f17d2 Christian Marangi 2024-10-25   86  	struct sa_record *sa_record = ctx->sa_record;
883ad7684f17d2 Christian Marangi 2024-10-25   87  	unsigned int keylen = len;
883ad7684f17d2 Christian Marangi 2024-10-25   88  	u32 flags = tmpl->flags;
883ad7684f17d2 Christian Marangi 2024-10-25   89  	u32 nonce = 0;
883ad7684f17d2 Christian Marangi 2024-10-25   90  	int ret;
883ad7684f17d2 Christian Marangi 2024-10-25   91  
883ad7684f17d2 Christian Marangi 2024-10-25   92  	if (!key || !keylen)
883ad7684f17d2 Christian Marangi 2024-10-25   93  		return -EINVAL;
883ad7684f17d2 Christian Marangi 2024-10-25   94  
883ad7684f17d2 Christian Marangi 2024-10-25   95  	if (IS_RFC3686(flags)) {
883ad7684f17d2 Christian Marangi 2024-10-25   96  		if (len < CTR_RFC3686_NONCE_SIZE)
883ad7684f17d2 Christian Marangi 2024-10-25   97  			return -EINVAL;
883ad7684f17d2 Christian Marangi 2024-10-25   98  
883ad7684f17d2 Christian Marangi 2024-10-25   99  		keylen = len - CTR_RFC3686_NONCE_SIZE;
883ad7684f17d2 Christian Marangi 2024-10-25  100  		memcpy(&nonce, key + keylen, CTR_RFC3686_NONCE_SIZE);
883ad7684f17d2 Christian Marangi 2024-10-25  101  	}
883ad7684f17d2 Christian Marangi 2024-10-25  102  
883ad7684f17d2 Christian Marangi 2024-10-25  103  	if (flags & EIP93_ALG_DES) {
883ad7684f17d2 Christian Marangi 2024-10-25  104  		ctx->blksize = DES_BLOCK_SIZE;
883ad7684f17d2 Christian Marangi 2024-10-25  105  		ret = verify_skcipher_des_key(ctfm, key);
883ad7684f17d2 Christian Marangi 2024-10-25  106  	}
883ad7684f17d2 Christian Marangi 2024-10-25  107  	if (flags & EIP93_ALG_3DES) {
883ad7684f17d2 Christian Marangi 2024-10-25  108  		ctx->blksize = DES3_EDE_BLOCK_SIZE;
883ad7684f17d2 Christian Marangi 2024-10-25  109  		ret = verify_skcipher_des3_key(ctfm, key);
883ad7684f17d2 Christian Marangi 2024-10-25  110  	}
883ad7684f17d2 Christian Marangi 2024-10-25  111  
883ad7684f17d2 Christian Marangi 2024-10-25  112  	if (flags & EIP93_ALG_AES) {
883ad7684f17d2 Christian Marangi 2024-10-25  113  		struct crypto_aes_ctx aes;
883ad7684f17d2 Christian Marangi 2024-10-25  114  
883ad7684f17d2 Christian Marangi 2024-10-25  115  		ctx->blksize = AES_BLOCK_SIZE;
883ad7684f17d2 Christian Marangi 2024-10-25  116  		ret = aes_expandkey(&aes, key, keylen);
883ad7684f17d2 Christian Marangi 2024-10-25  117  	}

What about if none the flags are set?

883ad7684f17d2 Christian Marangi 2024-10-25 @118  	if (ret)
883ad7684f17d2 Christian Marangi 2024-10-25  119  		return ret;
883ad7684f17d2 Christian Marangi 2024-10-25  120  
883ad7684f17d2 Christian Marangi 2024-10-25  121  	eip93_set_sa_record(sa_record, keylen, flags);
883ad7684f17d2 Christian Marangi 2024-10-25  122  
883ad7684f17d2 Christian Marangi 2024-10-25  123  	memcpy(sa_record->sa_key, key, keylen);
883ad7684f17d2 Christian Marangi 2024-10-25  124  	ctx->sa_nonce = nonce;
883ad7684f17d2 Christian Marangi 2024-10-25  125  	sa_record->sa_nonce = nonce;
883ad7684f17d2 Christian Marangi 2024-10-25  126  
883ad7684f17d2 Christian Marangi 2024-10-25  127  	return 0;
883ad7684f17d2 Christian Marangi 2024-10-25  128  }

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki





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