tree: https://github.com/weiny2/linux-kernel.git tip-pks-v4.6-5.12-rc head: 0a042414603935649c022b18cc1fdef0e7f2d3f3 commit: 25071b452a26dedd517b374ed5baf42970361e0a [25/32] <WARN SUP_PKEYS change>: kmap: Add stray access protection for device pages config: x86_64-randconfig-a006-20210316 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 50c7504a93fdb90c26870db8c8ea7add895c7725) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/weiny2/linux-kernel/commit/25071b452a26dedd517b374ed5b... git remote add weiny2 https://github.com/weiny2/linux-kernel.git git fetch --no-tags weiny2 tip-pks-v4.6-5.12-rc git checkout 25071b452a26dedd517b374ed5baf42970361e0a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/x86/mm/fault.c:20: include/linux/efi.h:1093:34: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch] status = get_var(L"SecureBoot", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, ^ include/linux/efi.h:1101:24: warning: passing 1-byte aligned argument to 4-byte aligned parameter 2 of 'get_var' may result in an unaligned pointer access [-Walign-mismatch] get_var(L"SetupMode", &EFI_GLOBAL_VARIABLE_GUID, NULL, &size, &setupmode); ^ bool handle_pks(struct pt_regs *regs, unsigned long error_code, ^ arch/x86/include/asm/processor.h:898:20: note: previous definition is here static inline bool handle_pks(struct pt_regs *regs, unsigned long error_code, ^ arch/x86/mm/fault.c:1241:14: error: implicit declaration of function 'extended_pt_regs' [-Werror,-Wimplicit-function-declaration] ept_regs = extended_pt_regs(regs); ^ arch/x86/mm/fault.c:1241:12: warning: incompatible integer to pointer conversion assigning to 'struct extended_pt_regs *' from 'int' [-Wint-conversion] ept_regs = extended_pt_regs(regs); ^ ~~~~~~~~~~~~~~~~~~~~~~ arch/x86/mm/fault.c:1242:27: error: incomplete definition of type 'struct extended_pt_regs' update_pkey_val(ept_regs->thread_pkrs, pkey, 0); ~~~~~~~~^ arch/x86/mm/fault.c:1224:10: note: forward declaration of 'struct extended_pt_regs' struct extended_pt_regs *ept_regs; ^ 3 warnings and 3 errors generated. vim +/handle_pks +1220 arch/x86/mm/fault.c 1218 1219 #ifdef CONFIG_ARCH_HAS_SUPERVISOR_PKEYS 1221 unsigned long address) 1222 { 1223 if (error_code & X86_PF_PK) { 1224 struct extended_pt_regs *ept_regs; 1225 struct page *page; 1226 int pkey; 1227 1228 page = virt_to_page(address); 1229 1230 if (!page || !page_is_globally_mapped(page)) 1231 return false; 1232 1233 if (pks_mode == PKS_MODE_STRICT) 1234 return false; 1235 1236 WARN_ONCE(pks_mode == PKS_MODE_RELAXED, 1237 "PKS fault on globally mapped device page 0x%lu pfn %lu", 1238 address, page_to_pfn(page)); 1239 1240 pkey = dev_get_dev_pkey(); 1241 ept_regs = extended_pt_regs(regs); 1242 update_pkey_val(ept_regs->thread_pkrs, pkey, 0); 1243 return true; 1244 } 1245 1246 return false; 1247 } 1248 #endif 1249 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org