linux-kernel - crypto/blake2b_generic.c:245:1: warning: the frame size of 1220 bytes is larger than 1024 bytes

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Message-ID: <201912010551.6rUbsvGE%lkp@intel.com>
Date:   Sun, 1 Dec 2019 05:54:53 +0800
From:   kbuild test robot <lkp@...el.com>
To:     David Sterba <dsterba@...e.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: crypto/blake2b_generic.c:245:1: warning: the frame size of 1220
 bytes is larger than 1024 bytes

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   32ef9553635ab1236c33951a8bd9b5af1c3b1646
commit: 91d689337fe8b7703608a2ec39aae700b99f3933 crypto: blake2b - add blake2b generic implementation
date:   4 weeks ago
config: arc-randconfig-a0031-20191201 (attached as .config)
compiler: arc-elf-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 91d689337fe8b7703608a2ec39aae700b99f3933
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=arc 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   crypto/blake2b_generic.c: In function 'blake2b_compress':
>> crypto/blake2b_generic.c:245:1: warning: the frame size of 1220 bytes is larger than 1024 bytes [-Wframe-larger-than=]
    }
    ^

vim +245 crypto/blake2b_generic.c

   183	
   184	#define G(r,i,a,b,c,d)                                  \
   185		do {                                            \
   186			a = a + b + m[blake2b_sigma[r][2*i+0]]; \
   187			d = ror64(d ^ a, 32);                   \
   188			c = c + d;                              \
   189			b = ror64(b ^ c, 24);                   \
   190			a = a + b + m[blake2b_sigma[r][2*i+1]]; \
   191			d = ror64(d ^ a, 16);                   \
   192			c = c + d;                              \
   193			b = ror64(b ^ c, 63);                   \
   194		} while (0)
   195	
   196	#define ROUND(r)                                \
   197		do {                                    \
   198			G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
   199			G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
   200			G(r,2,v[ 2],v[ 6],v[10],v[14]); \
   201			G(r,3,v[ 3],v[ 7],v[11],v[15]); \
   202			G(r,4,v[ 0],v[ 5],v[10],v[15]); \
   203			G(r,5,v[ 1],v[ 6],v[11],v[12]); \
   204			G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
   205			G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
   206		} while (0)
   207	
   208	static void blake2b_compress(struct blake2b_state *S,
   209				     const u8 block[BLAKE2B_BLOCKBYTES])
   210	{
   211		u64 m[16];
   212		u64 v[16];
   213		size_t i;
   214	
   215		for (i = 0; i < 16; ++i)
   216			m[i] = get_unaligned_le64(block + i * sizeof(m[i]));
   217	
   218		for (i = 0; i < 8; ++i)
   219			v[i] = S->h[i];
   220	
   221		v[ 8] = blake2b_IV[0];
   222		v[ 9] = blake2b_IV[1];
   223		v[10] = blake2b_IV[2];
   224		v[11] = blake2b_IV[3];
   225		v[12] = blake2b_IV[4] ^ S->t[0];
   226		v[13] = blake2b_IV[5] ^ S->t[1];
   227		v[14] = blake2b_IV[6] ^ S->f[0];
   228		v[15] = blake2b_IV[7] ^ S->f[1];
   229	
   230		ROUND(0);
   231		ROUND(1);
   232		ROUND(2);
   233		ROUND(3);
   234		ROUND(4);
   235		ROUND(5);
   236		ROUND(6);
   237		ROUND(7);
   238		ROUND(8);
   239		ROUND(9);
   240		ROUND(10);
   241		ROUND(11);
   242	
   243		for (i = 0; i < 8; ++i)
   244			S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
 > 245	}
   246	

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

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