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Date:	Sun, 24 Jan 2016 21:35:15 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	kbuild-all@...org,
	Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org, devel@...verdev.osuosl.org,
	dm-devel@...hat.com, linux-wireless@...r.kernel.org,
	linux-cifs@...r.kernel.org, ecryptfs@...r.kernel.org,
	linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
	linux-nfs@...r.kernel.org, keyrings@...r.kernel.org,
	linux-bluetooth@...r.kernel.org, ceph-devel@...r.kernel.org,
	linux-wpan@...r.kernel.org, linux-afs@...ts.infradead.org,
	drbd-dev@...ts.linbit.com, open-iscsi@...glegroups.com
Subject: Re: [PATCH 15/26] Bluetooth: Use skcipher and hash

Hi Herbert,

[auto build test ERROR on net/master]
[also build test ERROR on v4.4 next-20160122]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Herbert-Xu/crypto-Use-skcipher-and-ahash-shash-where-possible/20160124-212323
config: x86_64-randconfig-x014-201604 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   net/bluetooth/smp.c: In function 'aes_cmac':
>> net/bluetooth/smp.c:201:2: error: implicit declaration of function 'shash_desc_zero' [-Werror=implicit-function-declaration]
     shash_desc_zero(desc);
     ^
   net/bluetooth/smp.c: In function 'smp_e':
>> net/bluetooth/smp.c:397:2: error: implicit declaration of function 'skcipher_request_zero' [-Werror=implicit-function-declaration]
     skcipher_request_zero(req);
     ^
   cc1: some warnings being treated as errors

vim +/shash_desc_zero +201 net/bluetooth/smp.c

   195		if (err) {
   196			BT_ERR("cipher setkey failed: %d", err);
   197			return err;
   198		}
   199	
   200		err = crypto_shash_digest(desc, msg_msb, len, mac_msb);
 > 201		shash_desc_zero(desc);
   202		if (err) {
   203			BT_ERR("Hash computation error %d", err);
   204			return err;
   205		}
   206	
   207		swap_buf(mac_msb, mac, 16);
   208	
   209		SMP_DBG("mac %16phN", mac);
   210	
   211		return 0;
   212	}
   213	
   214	static int smp_f4(struct crypto_shash *tfm_cmac, const u8 u[32],
   215			  const u8 v[32], const u8 x[16], u8 z, u8 res[16])
   216	{
   217		u8 m[65];
   218		int err;
   219	
   220		SMP_DBG("u %32phN", u);
   221		SMP_DBG("v %32phN", v);
   222		SMP_DBG("x %16phN z %02x", x, z);
   223	
   224		m[0] = z;
   225		memcpy(m + 1, v, 32);
   226		memcpy(m + 33, u, 32);
   227	
   228		err = aes_cmac(tfm_cmac, x, m, sizeof(m), res);
   229		if (err)
   230			return err;
   231	
   232		SMP_DBG("res %16phN", res);
   233	
   234		return err;
   235	}
   236	
   237	static int smp_f5(struct crypto_shash *tfm_cmac, const u8 w[32],
   238			  const u8 n1[16], const u8 n2[16], const u8 a1[7],
   239			  const u8 a2[7], u8 mackey[16], u8 ltk[16])
   240	{
   241		/* The btle, salt and length "magic" values are as defined in
   242		 * the SMP section of the Bluetooth core specification. In ASCII
   243		 * the btle value ends up being 'btle'. The salt is just a
   244		 * random number whereas length is the value 256 in little
   245		 * endian format.
   246		 */
   247		const u8 btle[4] = { 0x65, 0x6c, 0x74, 0x62 };
   248		const u8 salt[16] = { 0xbe, 0x83, 0x60, 0x5a, 0xdb, 0x0b, 0x37, 0x60,
   249				      0x38, 0xa5, 0xf5, 0xaa, 0x91, 0x83, 0x88, 0x6c };
   250		const u8 length[2] = { 0x00, 0x01 };
   251		u8 m[53], t[16];
   252		int err;
   253	
   254		SMP_DBG("w %32phN", w);
   255		SMP_DBG("n1 %16phN n2 %16phN", n1, n2);
   256		SMP_DBG("a1 %7phN a2 %7phN", a1, a2);
   257	
   258		err = aes_cmac(tfm_cmac, salt, w, 32, t);
   259		if (err)
   260			return err;
   261	
   262		SMP_DBG("t %16phN", t);
   263	
   264		memcpy(m, length, 2);
   265		memcpy(m + 2, a2, 7);
   266		memcpy(m + 9, a1, 7);
   267		memcpy(m + 16, n2, 16);
   268		memcpy(m + 32, n1, 16);
   269		memcpy(m + 48, btle, 4);
   270	
   271		m[52] = 0; /* Counter */
   272	
   273		err = aes_cmac(tfm_cmac, t, m, sizeof(m), mackey);
   274		if (err)
   275			return err;
   276	
   277		SMP_DBG("mackey %16phN", mackey);
   278	
   279		m[52] = 1; /* Counter */
   280	
   281		err = aes_cmac(tfm_cmac, t, m, sizeof(m), ltk);
   282		if (err)
   283			return err;
   284	
   285		SMP_DBG("ltk %16phN", ltk);
   286	
   287		return 0;
   288	}
   289	
   290	static int smp_f6(struct crypto_shash *tfm_cmac, const u8 w[16],
   291			  const u8 n1[16], const u8 n2[16], const u8 r[16],
   292			  const u8 io_cap[3], const u8 a1[7], const u8 a2[7],
   293			  u8 res[16])
   294	{
   295		u8 m[65];
   296		int err;
   297	
   298		SMP_DBG("w %16phN", w);
   299		SMP_DBG("n1 %16phN n2 %16phN", n1, n2);
   300		SMP_DBG("r %16phN io_cap %3phN a1 %7phN a2 %7phN", r, io_cap, a1, a2);
   301	
   302		memcpy(m, a2, 7);
   303		memcpy(m + 7, a1, 7);
   304		memcpy(m + 14, io_cap, 3);
   305		memcpy(m + 17, r, 16);
   306		memcpy(m + 33, n2, 16);
   307		memcpy(m + 49, n1, 16);
   308	
   309		err = aes_cmac(tfm_cmac, w, m, sizeof(m), res);
   310		if (err)
   311			return err;
   312	
   313		SMP_DBG("res %16phN", res);
   314	
   315		return err;
   316	}
   317	
   318	static int smp_g2(struct crypto_shash *tfm_cmac, const u8 u[32], const u8 v[32],
   319			  const u8 x[16], const u8 y[16], u32 *val)
   320	{
   321		u8 m[80], tmp[16];
   322		int err;
   323	
   324		SMP_DBG("u %32phN", u);
   325		SMP_DBG("v %32phN", v);
   326		SMP_DBG("x %16phN y %16phN", x, y);
   327	
   328		memcpy(m, y, 16);
   329		memcpy(m + 16, v, 32);
   330		memcpy(m + 48, u, 32);
   331	
   332		err = aes_cmac(tfm_cmac, x, m, sizeof(m), tmp);
   333		if (err)
   334			return err;
   335	
   336		*val = get_unaligned_le32(tmp);
   337		*val %= 1000000;
   338	
   339		SMP_DBG("val %06u", *val);
   340	
   341		return 0;
   342	}
   343	
   344	static int smp_h6(struct crypto_shash *tfm_cmac, const u8 w[16],
   345			  const u8 key_id[4], u8 res[16])
   346	{
   347		int err;
   348	
   349		SMP_DBG("w %16phN key_id %4phN", w, key_id);
   350	
   351		err = aes_cmac(tfm_cmac, w, key_id, 4, res);
   352		if (err)
   353			return err;
   354	
   355		SMP_DBG("res %16phN", res);
   356	
   357		return err;
   358	}
   359	
   360	/* The following functions map to the legacy SMP crypto functions e, c1,
   361	 * s1 and ah.
   362	 */
   363	
   364	static int smp_e(struct crypto_skcipher *tfm, const u8 *k, u8 *r)
   365	{
   366		SKCIPHER_REQUEST_ON_STACK(req, tfm);
   367		struct scatterlist sg;
   368		uint8_t tmp[16], data[16];
   369		int err;
   370	
   371		SMP_DBG("k %16phN r %16phN", k, r);
   372	
   373		if (!tfm) {
   374			BT_ERR("tfm %p", tfm);
   375			return -EINVAL;
   376		}
   377	
   378		/* The most significant octet of key corresponds to k[0] */
   379		swap_buf(k, tmp, 16);
   380	
   381		err = crypto_skcipher_setkey(tfm, tmp, 16);
   382		if (err) {
   383			BT_ERR("cipher setkey failed: %d", err);
   384			return err;
   385		}
   386	
   387		/* Most significant octet of plaintextData corresponds to data[0] */
   388		swap_buf(r, data, 16);
   389	
   390		sg_init_one(&sg, data, 16);
   391	
   392		skcipher_request_set_tfm(req, tfm);
   393		skcipher_request_set_callback(req, 0, NULL, NULL);
   394		skcipher_request_set_crypt(req, &sg, &sg, 16, NULL);
   395	
   396		err = crypto_skcipher_encrypt(req);
 > 397		skcipher_request_zero(req);
   398		if (err)
   399			BT_ERR("Encrypt data error %d", err);
   400	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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