tree: https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git crypto-pending head: 67824d3cb5325de4264ad344174a7e4ea69e5303 commit: d98684f7dc5be61c6380f6c5a4d5dae44c6ddbca [3/7] crypto: hctr2 - Add HCTR2 support config: arm-randconfig-s031-20220214 (https://download.01.org/0day-ci/archive/20220215/202202151139.J5pKremk-lk...) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git/commit... git remote add ebiggers https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git git fetch --no-tags ebiggers crypto-pending git checkout d98684f7dc5be61c6380f6c5a4d5dae44c6ddbca # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) crypto/xctr.c:94:22: sparse: sparse: restricted __le32 degrades to integer vim +66 crypto/xctr.c 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 48 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 49 static int crypto_xctr_crypt_segment(struct skcipher_walk *walk, 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 50 struct crypto_cipher *tfm, u32 byte_ctr) 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 51 { 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 52 void (*fn)(struct crypto_tfm *, u8 *, const u8 *) = 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 53 crypto_cipher_alg(tfm)->cia_encrypt; 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 54 u8 *src = walk->src.virt.addr; 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 55 u8 *dst = walk->dst.virt.addr; 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 56 unsigned int nbytes = walk->nbytes; 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 57 __le32 ctr32 = cpu_to_le32(byte_ctr / XCTR_BLOCKSIZE + 1); 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 58 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 59 do { 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 60 /* create keystream */ 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 61 crypto_xor(walk->iv, (u8 *)&ctr32, sizeof(ctr32)); 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 62 fn(crypto_cipher_tfm(tfm), dst, walk->iv); 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 63 crypto_xor(dst, src, XCTR_BLOCKSIZE); 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 64 crypto_xor(walk->iv, (u8 *)&ctr32, sizeof(ctr32)); 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 65 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 @66 ctr32++; 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 67 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 68 src += XCTR_BLOCKSIZE; 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 69 dst += XCTR_BLOCKSIZE; 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 70 } while ((nbytes -= XCTR_BLOCKSIZE) >= XCTR_BLOCKSIZE); 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 71 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 72 return nbytes; 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 73 } 8330f8a6b750f6 Nathan Huckleberry 2022-02-10 74 :::::: The code at line 66 was first introduced by commit :::::: 8330f8a6b750f6b7b65987a27d4bf7d2bebde570 crypto: xctr - Add XCTR support :::::: TO: Nathan Huckleberry <nhuck(a)google.com&gt; :::::: CC: Eric Biggers <ebiggers(a)google.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org