tree: https://git.kernel.org/pub/scm/linux/kernel/git/mbroz/linux.git dm-cryptsetup head: 143a1bb5cdc03325e4fbfbdb8d4fb96bafa830ee commit: 143a1bb5cdc03325e4fbfbdb8d4fb96bafa830ee [1/1] dm-crypt: Implement Elephant diffuser for Bitlocker compatibility reproduce: # apt-get install sparse # sparse version: v0.6.1-129-g341daf20-dirty git checkout 143a1bb5cdc03325e4fbfbdb8d4fb96bafa830ee make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/md/dm-crypt.c:786:57: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:786:35: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:792:31: sparse: sparse: bad assignment (+=) to restricted __le32 drivers/md/dm-crypt.c:798:44: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:798:58: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:798:35: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:798:31: sparse: sparse: bad assignment (+=) to restricted __le32 drivers/md/dm-crypt.c:801:31: sparse: sparse: bad assignment (+=) to restricted __le32 drivers/md/dm-crypt.c:817:31: sparse: sparse: bad assignment (-=) to restricted __le32 drivers/md/dm-crypt.c:820:44: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:820:58: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:820:35: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:820:31: sparse: sparse: bad assignment (-=) to restricted __le32 drivers/md/dm-crypt.c:826:31: sparse: sparse: bad assignment (-=) to restricted __le32 drivers/md/dm-crypt.c:832:44: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:832:57: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:832:35: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:832:31: sparse: sparse: bad assignment (-=) to restricted __le32 drivers/md/dm-crypt.c:848:31: sparse: sparse: bad assignment (+=) to restricted __le32 drivers/md/dm-crypt.c:851:44: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:851:58: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:851:35: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:851:31: sparse: sparse: bad assignment (+=) to restricted __le32 drivers/md/dm-crypt.c:857:31: sparse: sparse: bad assignment (+=) to restricted __le32 drivers/md/dm-crypt.c:863:44: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:863:58: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:863:35: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:863:31: sparse: sparse: bad assignment (+=) to restricted __le32 drivers/md/dm-crypt.c:879:44: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:879:58: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:879:35: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:879:31: sparse: sparse: bad assignment (-=) to restricted __le32 drivers/md/dm-crypt.c:885:31: sparse: sparse: bad assignment (-=) to restricted __le32 drivers/md/dm-crypt.c:891:44: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:891:58: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:891:35: sparse: sparse: restricted __le32 degrades to integer drivers/md/dm-crypt.c:891:31: sparse: sparse: bad assignment (-=) to restricted __le32 drivers/md/dm-crypt.c:894:31: sparse: sparse: bad assignment (-=) to restricted __le32 vim +786 drivers/md/dm-crypt.c 775 776 static void diffuser_a_decrypt(__le32 *d, size_t n) 777 { 778 int i, i1, i2, i3; 779 780 for (i = 0; i < 5; i++) { 781 i1 = 0; 782 i2 = n - 2; 783 i3 = n - 5; 784 785 while (i1 < (n - 1)) { 787 i1++; i2++; i3++; 788 789 if (i3 >= n) 790 i3 -= n; 791 792 d[i1] += d[i2] ^ d[i3]; 793 i1++; i2++; i3++; 794 795 if (i2 >= n) 796 i2 -= n; 797 798 d[i1] += d[i2] ^ (d[i3] << 13 | d[i3] >> 19); 799 i1++; i2++; i3++; 800 801 d[i1] += d[i2] ^ d[i3]; 802 i1++; i2++; i3++; 803 } 804 } 805 } 806 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation