[kbuild-all] include/linux/mmzone.h:1244:29: sparse: sparse: invalid access past the end of 'mem_section' (512 512)

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f78d76e72a4671ea52d12752d92077788b4f5d50 commit: 0697e5e06ea0d96e2d1508104ff3b13e4dddc4bb ARM: 8974/1: use SPARSMEM_STATIC when SPARSEMEM is enabled date: 10 months ago config: arm-randconfig-s032-20210312 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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: v0.6.3-262-g5e674421-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 0697e5e06ea0d96e2d1508104ff3b13e4dddc4bb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 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 >>)" lib/crypto/chacha20poly1305.c: note: in included file (through include/linux/gfp.h, include/linux/slab.h, include/linux/crypto.h, ...): -- lib/crypto/chacha20poly1305-selftest.c: note: in included file (through include/linux/gfp.h, include/linux/mm.h, include/linux/scatterlist.h, ...): vim +/mem_section +1244 include/linux/mmzone.h 29751f6991e845 Andy Whitcroft 2005-06-23 1241 29751f6991e845 Andy Whitcroft 2005-06-23 1242 static inline struct page *__section_mem_map_addr(struct mem_section *section) 29751f6991e845 Andy Whitcroft 2005-06-23 1243 { 29751f6991e845 Andy Whitcroft 2005-06-23 @1244 unsigned long map = section->section_mem_map; 29751f6991e845 Andy Whitcroft 2005-06-23 1245 map &= SECTION_MAP_MASK; 29751f6991e845 Andy Whitcroft 2005-06-23 1246 return (struct page *)map; 29751f6991e845 Andy Whitcroft 2005-06-23 1247 } 29751f6991e845 Andy Whitcroft 2005-06-23 1248 :::::: The code at line 1244 was first introduced by commit :::::: 29751f6991e845f7d002a6ae520bf996b38c8dcd [PATCH] sparsemem hotplug base :::::: TO: Andy Whitcroft <apw(a)shadowen.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org