[ebiggers:aes-modes-v1 20/33] security/keys/trusted-keys/trusted_dcp.c:190:2: error: call to undeclared function 'put_unaligned_le32'; ISO C99 and later do not support implicit function declarations

[ebiggers:aes-modes-v1 20/33] security/keys/trusted-keys/trusted_dcp.c:190:2: error: call to undeclared function 'put_unaligned_le32'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git aes-modes-v1
head:   d26ef6871f91c259a44fb5a45937efe22313453a
commit: 9ed0ee739ea68cc0eb5a7461066ac3ea3c7d956b [20/33] KEYS: trusted: dcp: Use AES-GCM library instead of crypto_aead
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20260708/202607081028.w8J5w6U9-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 0a2fb2a2269da0e2a3e230beb6cad39ca314db33)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260708/202607081028.w8J5w6U9-lkp@intel.com/reproduce)

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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202607081028.w8J5w6U9-lkp@intel.com/

All errors (new ones prefixed by >>):

>> security/keys/trusted-keys/trusted_dcp.c:190:2: error: call to undeclared function 'put_unaligned_le32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     190 |         put_unaligned_le32(p->key_len, &b->payload_len);
         |         ^
   1 error generated.


vim +/put_unaligned_le32 +190 security/keys/trusted-keys/trusted_dcp.c

2e8a0f40a39cc2 David Gstir 2024-04-03  158  
2e8a0f40a39cc2 David Gstir 2024-04-03  159  static int trusted_dcp_seal(struct trusted_key_payload *p, char *datablob)
2e8a0f40a39cc2 David Gstir 2024-04-03  160  {
2e8a0f40a39cc2 David Gstir 2024-04-03  161  	struct dcp_blob_fmt *b = (struct dcp_blob_fmt *)p->blob;
2e8a0f40a39cc2 David Gstir 2024-04-03  162  	int blen, ret;
e8d9fab39d1f87 David Gstir 2024-11-13  163  	u8 *plain_blob_key;
2e8a0f40a39cc2 David Gstir 2024-04-03  164  
2e8a0f40a39cc2 David Gstir 2024-04-03  165  	blen = calc_blob_len(p->key_len);
2e8a0f40a39cc2 David Gstir 2024-04-03  166  	if (blen > MAX_BLOB_SIZE)
2e8a0f40a39cc2 David Gstir 2024-04-03  167  		return -E2BIG;
2e8a0f40a39cc2 David Gstir 2024-04-03  168  
e8d9fab39d1f87 David Gstir 2024-11-13  169  	plain_blob_key = kmalloc(AES_KEYSIZE_128, GFP_KERNEL);
e8d9fab39d1f87 David Gstir 2024-11-13  170  	if (!plain_blob_key)
e8d9fab39d1f87 David Gstir 2024-11-13  171  		return -ENOMEM;
e8d9fab39d1f87 David Gstir 2024-11-13  172  
2e8a0f40a39cc2 David Gstir 2024-04-03  173  	b->fmt_version = DCP_BLOB_VERSION;
2e8a0f40a39cc2 David Gstir 2024-04-03  174  	get_random_bytes(b->nonce, AES_KEYSIZE_128);
0e28bf61a5f9ab David Gstir 2024-07-17  175  	get_random_bytes(plain_blob_key, AES_KEYSIZE_128);
2e8a0f40a39cc2 David Gstir 2024-04-03  176  
0e28bf61a5f9ab David Gstir 2024-07-17  177  	ret = do_aead_crypto(p->key, b->payload, p->key_len, plain_blob_key,
2e8a0f40a39cc2 David Gstir 2024-04-03  178  			     b->nonce, true);
2e8a0f40a39cc2 David Gstir 2024-04-03  179  	if (ret) {
2e8a0f40a39cc2 David Gstir 2024-04-03  180  		pr_err("Unable to encrypt blob payload: %i\n", ret);
0e28bf61a5f9ab David Gstir 2024-07-17  181  		goto out;
2e8a0f40a39cc2 David Gstir 2024-04-03  182  	}
2e8a0f40a39cc2 David Gstir 2024-04-03  183  
0e28bf61a5f9ab David Gstir 2024-07-17  184  	ret = encrypt_blob_key(plain_blob_key, b->blob_key);
2e8a0f40a39cc2 David Gstir 2024-04-03  185  	if (ret) {
2e8a0f40a39cc2 David Gstir 2024-04-03  186  		pr_err("Unable to encrypt blob key: %i\n", ret);
0e28bf61a5f9ab David Gstir 2024-07-17  187  		goto out;
2e8a0f40a39cc2 David Gstir 2024-04-03  188  	}
2e8a0f40a39cc2 David Gstir 2024-04-03  189  
6486cad00a8b7f David Gstir 2024-07-17 @190  	put_unaligned_le32(p->key_len, &b->payload_len);
2e8a0f40a39cc2 David Gstir 2024-04-03  191  	p->blob_len = blen;
0e28bf61a5f9ab David Gstir 2024-07-17  192  	ret = 0;
0e28bf61a5f9ab David Gstir 2024-07-17  193  
0e28bf61a5f9ab David Gstir 2024-07-17  194  out:
e8d9fab39d1f87 David Gstir 2024-11-13  195  	memzero_explicit(plain_blob_key, AES_KEYSIZE_128);
e8d9fab39d1f87 David Gstir 2024-11-13  196  	kfree(plain_blob_key);
0e28bf61a5f9ab David Gstir 2024-07-17  197  
0e28bf61a5f9ab David Gstir 2024-07-17  198  	return ret;
2e8a0f40a39cc2 David Gstir 2024-04-03  199  }
2e8a0f40a39cc2 David Gstir 2024-04-03  200  

:::::: The code at line 190 was first introduced by commit
:::::: 6486cad00a8b7f8585983408c152bbe33dda529b KEYS: trusted: fix DCP blob payload length assignment

:::::: TO: David Gstir <david@sigma-star.at>
:::::: CC: Jarkko Sakkinen <jarkko@kernel.org>

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