tree: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git memcpy/step2/next-20211206 head: 082faead4a3c2e5d9f541f97d8d4d5fa0f88dce0 commit: 155d6a9544f46fb8ae0e7e3c11a4deac352e7b9a [8/19] fortify: Detect struct member overflows in memmove() at compile-time config: i386-randconfig-s001-20211207 (https://download.01.org/0day-ci/archive/20211209/202112090054.dh3ZS3k5-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id... git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git git fetch --no-tags kees memcpy/step2/next-20211206 git checkout 155d6a9544f46fb8ae0e7e3c11a4deac352e7b9a # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/video/fbdev/ 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 >>) drivers/video/fbdev/hgafb.c:496:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:496:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] dest drivers/video/fbdev/hgafb.c:496:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:496:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] src drivers/video/fbdev/hgafb.c:496:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:496:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] dest drivers/video/fbdev/hgafb.c:496:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:496:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] src drivers/video/fbdev/hgafb.c:496:25: sparse: expected void * drivers/video/fbdev/hgafb.c:496:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] dest drivers/video/fbdev/hgafb.c:496:25: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *[assigned] src @@ drivers/video/fbdev/hgafb.c:496:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:496:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] src drivers/video/fbdev/hgafb.c:507:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *[assigned] dest @@ drivers/video/fbdev/hgafb.c:507:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:507:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] dest drivers/video/fbdev/hgafb.c:507:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *[assigned] src @@ drivers/video/fbdev/hgafb.c:507:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:507:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] src drivers/video/fbdev/hgafb.c:507:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *[assigned] dest @@ drivers/video/fbdev/hgafb.c:507:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:507:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] dest drivers/video/fbdev/hgafb.c:507:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *[assigned] src @@ drivers/video/fbdev/hgafb.c:507:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:507:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] src drivers/video/fbdev/hgafb.c:507:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void * @@ got unsigned char [noderef] [usertype] __iomem *[assigned] dest @@ drivers/video/fbdev/hgafb.c:507:25: sparse: expected void * drivers/video/fbdev/hgafb.c:507:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] dest drivers/video/fbdev/hgafb.c:507:25: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const * @@ got unsigned char [noderef] [usertype] __iomem *[assigned] src @@ drivers/video/fbdev/hgafb.c:507:25: sparse: expected void const * drivers/video/fbdev/hgafb.c:507:25: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] src vim +496 drivers/video/fbdev/hgafb.c ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 482 ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 483 static void hgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area) ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 484 { ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 485 u_int rows, y1, y2; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 486 u8 __iomem *src; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 487 u8 __iomem *dest; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 488 ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 489 if (area->dy <= area->sy) { ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 490 y1 = area->sy; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 491 y2 = area->dy; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 492 ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 493 for (rows = area->height; rows--; ) { ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 494 src = rowaddr(info, y1) + (area->sx >> 3); ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 495 dest = rowaddr(info, y2) + (area->dx >> 3); 529ed806d4540d drivers/video/hgafb.c Brent Cook 2010-12-31 @496 memmove(dest, src, (area->width >> 3)); ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 497 y1++; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 498 y2++; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 499 } ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 500 } else { ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 501 y1 = area->sy + area->height - 1; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 502 y2 = area->dy + area->height - 1; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 503 ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 504 for (rows = area->height; rows--;) { ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 505 src = rowaddr(info, y1) + (area->sx >> 3); ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 506 dest = rowaddr(info, y2) + (area->dx >> 3); 529ed806d4540d drivers/video/hgafb.c Brent Cook 2010-12-31 507 memmove(dest, src, (area->width >> 3)); ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 508 y1--; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 509 y2--; ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 510 } ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 511 } ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 512 } ^1da177e4c3f41 drivers/video/hgafb.c Linus Torvalds 2005-04-16 513 :::::: The code at line 496 was first introduced by commit :::::: 529ed806d4540d23ca2f68b28c3715d1566fc3ac video: Fix the HGA framebuffer driver :::::: TO: Brent Cook <busterb(a)gmail.com&gt; :::::: CC: Paul Mundt <lethal(a)linux-sh.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org