tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9e723c5380c6e14fb91a8b6950563d040674afdb commit: e5fc436f06eef54ef512ea55a9db8eb9f2e76959 sparse: use static inline for __chk_{user,io}_ptr() date: 12 months ago config: arm-randconfig-s031-20210810 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0 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: v0.6.3-348-gf0e6938b-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 e5fc436f06eef54ef512ea55a9db8eb9f2e76959 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 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 >>) arch/arm/kernel/traps.c:148:37: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned long * @@ arch/arm/kernel/traps.c:148:37: sparse: expected void const volatile [noderef] __user *ptr arch/arm/kernel/traps.c:148:37: sparse: got unsigned long * arch/arm/kernel/traps.c:177:31: sparse: expected void const volatile [noderef] __user *ptr arch/arm/kernel/traps.c:177:31: sparse: got unsigned short [usertype] * arch/arm/kernel/traps.c:179:31: sparse: expected void const volatile [noderef] __user *ptr arch/arm/kernel/traps.c:179:31: sparse: got unsigned int [usertype] * arch/arm/kernel/traps.c:455:33: sparse: sparse: cast removes address space '__user' of expression arch/arm/kernel/traps.c:458:41: sparse: sparse: cast removes address space '__user' of expression arch/arm/kernel/traps.c:463:33: sparse: sparse: cast removes address space '__user' of expression arch/arm/kernel/traps.c:775:6: sparse: sparse: symbol 'abort' was not declared. Should it be static? vim +177 arch/arm/kernel/traps.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 159 b9dd05c7002ee0 Mark Rutland 2017-11-02 160 static void __dump_instr(const char *lvl, struct pt_regs *regs) ^1da177e4c3f41 Linus Torvalds 2005-04-16 161 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 162 unsigned long addr = instruction_pointer(regs); ^1da177e4c3f41 Linus Torvalds 2005-04-16 163 const int thumb = thumb_mode(regs); ^1da177e4c3f41 Linus Torvalds 2005-04-16 164 const int width = thumb ? 4 : 8; d191fe093f4494 Russell King 2009-10-11 165 char str[sizeof("00000000 ") * 5 + 2 + 1], *p = str; ^1da177e4c3f41 Linus Torvalds 2005-04-16 166 int i; ^1da177e4c3f41 Linus Torvalds 2005-04-16 167 ^1da177e4c3f41 Linus Torvalds 2005-04-16 168 /* b9dd05c7002ee0 Mark Rutland 2017-11-02 169 * Note that we now dump the code first, just in case the backtrace b9dd05c7002ee0 Mark Rutland 2017-11-02 170 * kills us. ^1da177e4c3f41 Linus Torvalds 2005-04-16 171 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 172 a9011580a99cd4 Russell King 2011-06-09 173 for (i = -4; i < 1 + !!thumb; i++) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 174 unsigned int val, bad; ^1da177e4c3f41 Linus Torvalds 2005-04-16 175 ^1da177e4c3f41 Linus Torvalds 2005-04-16 176 if (thumb) b9dd05c7002ee0 Mark Rutland 2017-11-02 @177 bad = get_user(val, &((u16 *)addr)[i]); ^1da177e4c3f41 Linus Torvalds 2005-04-16 178 else b9dd05c7002ee0 Mark Rutland 2017-11-02 @179 bad = get_user(val, &((u32 *)addr)[i]); ^1da177e4c3f41 Linus Torvalds 2005-04-16 180 ^1da177e4c3f41 Linus Torvalds 2005-04-16 181 if (!bad) d191fe093f4494 Russell King 2009-10-11 182 p += sprintf(p, i == 0 ? "(%0*x) " : "%0*x ", d191fe093f4494 Russell King 2009-10-11 183 width, val); ^1da177e4c3f41 Linus Torvalds 2005-04-16 184 else { d191fe093f4494 Russell King 2009-10-11 185 p += sprintf(p, "bad PC value"); ^1da177e4c3f41 Linus Torvalds 2005-04-16 186 break; ^1da177e4c3f41 Linus Torvalds 2005-04-16 187 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 188 } e40c2ec6761d11 Russell King 2009-10-11 189 printk("%sCode: %s\n", lvl, str); b9dd05c7002ee0 Mark Rutland 2017-11-02 190 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 191 :::::: The code at line 177 was first introduced by commit :::::: b9dd05c7002ee0ca8b676428b2268c26399b5e31 ARM: 8720/1: ensure dump_instr() checks addr_limit :::::: TO: Mark Rutland <mark.rutland(a)arm.com&gt; :::::: CC: Russell King <rmk+kernel(a)armlinux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org