linux-kernel - Re: [PATCH v5 1/4] siphash: add cryptographically secure PRF

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Message-ID: <201612161020.sObmV22t%fengguang.wu@intel.com>
Date:   Fri, 16 Dec 2016 10:14:59 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     kbuild-all@...org, Netdev <netdev@...r.kernel.org>,
        kernel-hardening@...ts.openwall.com,
        LKML <linux-kernel@...r.kernel.org>,
        linux-crypto@...r.kernel.org,
        David Laight <David.Laight@...lab.com>,
        Ted Tso <tytso@....edu>,
        Hannes Frederic Sowa <hannes@...essinduktion.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Eric Biggers <ebiggers3@...il.com>,
        Tom Herbert <tom@...bertland.com>,
        George Spelvin <linux@...encehorizons.net>,
        Vegard Nossum <vegard.nossum@...il.com>, ak@...ux.intel.com,
        davem@...emloft.net, luto@...capital.net,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        Jean-Philippe Aumasson <jeanphilippe.aumasson@...il.com>,
        "Daniel J . Bernstein" <djb@...yp.to>
Subject: Re: [PATCH v5 1/4] siphash: add cryptographically secure PRF

Hi Jason,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.9 next-20161215]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Jason-A-Donenfeld/siphash-add-cryptographically-secure-PRF/20161216-092837
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

   lib/siphash.c: In function 'siphash_unaligned':
>> lib/siphash.c:123:15: error: 'bytes' undeclared (first use in this function)
     case 1: b |= bytes[0];
                  ^~~~~
   lib/siphash.c:123:15: note: each undeclared identifier is reported only once for each function it appears in

vim +/bytes +123 lib/siphash.c

   117		case 7: b |= ((u64)end[6]) << 48;
   118		case 6: b |= ((u64)end[5]) << 40;
   119		case 5: b |= ((u64)end[4]) << 32;
   120		case 4: b |= get_unaligned_le32(end); break;
   121		case 3: b |= ((u64)end[2]) << 16;
   122		case 2: b |= get_unaligned_le16(end); break;
 > 123		case 1: b |= bytes[0];
   124		}
   125	#endif
   126		v3 ^= b;

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