tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/core head: 647d1adb49f099ced76b510d55365be7f3063341 commit: 647d1adb49f099ced76b510d55365be7f3063341 [2/2] x86/dumpstack/64: Add guard pages to stack_info config: x86_64-randconfig-a011-20210916 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue x86/core git checkout 647d1adb49f099ced76b510d55365be7f3063341 # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash 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 >>): arch/x86/kernel/traps.c: In function 'exc_double_fault': 468 | if (get_stack_info_noinstr((void *)address, current, &info) && | ^~~~~~~ arch/x86/kernel/traps.c:468:38: note: each undeclared identifier is reported only once for each function it appears in vim +/address +468 arch/x86/kernel/traps.c 463 464 #ifdef CONFIG_X86_64 465 { 466 struct stack_info info; 467 469 info.type & STACK_TYPE_GUARD) { 470 const char *name = stack_type_name(info.type & ~STACK_TYPE_GUARD); 471 pr_emerg("BUG: %s stack guard hit at %p (stack is %p..%p)\n", 472 name, (void *)address, info.begin, info.end); 473 } 474 } 475 #endif 476 477 pr_emerg("PANIC: double fault, error_code: 0x%lx\n", error_code); 478 die("double fault", regs, error_code); 479 panic("Machine halted."); 480 instrumentation_end(); 481 } 482 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org