CC: kbuild-...@lists.01.org BCC: l...@intel.com CC: linux-cry...@vger.kernel.org TO: "Jason A. Donenfeld" <zx...@kernel.org> CC: Herbert Xu <herb...@gondor.apana.org.au>
Hi Jason, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master head: 7b2206d8809259b0dd297f0ccf017bf2dea98a02 commit: d2825fa9365d0101571ed16534b16b7c8d261ab3 [1/14] crypto: sm3,sm4 - move into crypto directory :::::: branch date: 6 hours ago :::::: commit date: 6 hours ago compiler: powerpc-linux-gcc (GCC) 11.2.0 reproduce (cppcheck warning): # apt-get install cppcheck git checkout d2825fa9365d0101571ed16534b16b7c8d261ab3 cppcheck --quiet --enable=style,performance,portability --template=gcc FILE If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> cppcheck possible warnings: (new ones prefixed by >>, may not real problems) >> crypto/sm4.c:171:25: warning: Same expression on both sides of '-'. >> [duplicateExpression] put_unaligned_be32(x[3 - 3], out + 3 * 4); ^ vim +171 crypto/sm4.c 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 145 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 146 /** 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 147 * sm4_crypt_block - Encrypt or decrypt a single SM4 block 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 148 * @rk: The rkey_enc for encrypt or rkey_dec for decrypt 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 149 * @out: Buffer to store output data 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 150 * @in: Buffer containing the input data 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 151 */ 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 152 void sm4_crypt_block(const u32 *rk, u8 *out, const u8 *in) 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 153 { 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 154 u32 x[4], i; 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 155 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 156 x[0] = get_unaligned_be32(in + 0 * 4); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 157 x[1] = get_unaligned_be32(in + 1 * 4); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 158 x[2] = get_unaligned_be32(in + 2 * 4); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 159 x[3] = get_unaligned_be32(in + 3 * 4); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 160 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 161 for (i = 0; i < 32; i += 4) { 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 162 x[0] = sm4_round(x[0], x[1], x[2], x[3], rk[i + 0]); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 163 x[1] = sm4_round(x[1], x[2], x[3], x[0], rk[i + 1]); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 164 x[2] = sm4_round(x[2], x[3], x[0], x[1], rk[i + 2]); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 165 x[3] = sm4_round(x[3], x[0], x[1], x[2], rk[i + 3]); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 166 } 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 167 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 168 put_unaligned_be32(x[3 - 0], out + 0 * 4); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 169 put_unaligned_be32(x[3 - 1], out + 1 * 4); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 170 put_unaligned_be32(x[3 - 2], out + 2 * 4); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 @171 put_unaligned_be32(x[3 - 3], out + 3 * 4); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 172 } 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 173 EXPORT_SYMBOL_GPL(sm4_crypt_block); 2b31277af577b1 lib/crypto/sm4.c Tianjia Zhang 2021-07-20 174 :::::: The code at line 171 was first introduced by commit :::::: 2b31277af577b1b2da62c3ad7d3315b422869102 crypto: sm4 - create SM4 library based on sm4 generic code :::::: TO: Tianjia Zhang <tianjia.zh...@linux.alibaba.com> :::::: CC: Herbert Xu <herb...@gondor.apana.org.au> -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- kbuild@lists.01.org To unsubscribe send an email to kbuild-le...@lists.01.org
