On Wed, Dec 5, 2018 at 5:52 AM kbuild test robot <lkp@xxxxxxxxx> wrote:
>
> tree: git://git.cmpxchg.org/linux-mmotm.git master
> head: 1b1ce5151f3dd9a5bc989207ac56e96dcb84bef4
> commit: e76ec930bbe0906735fa147736ab051a8e256b1b [48/283] kasan: initialize shadow to 0xff for tag-based mode
> config: x86_64-randconfig-x013-12041647 (attached as .config)
> compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
> reproduce:
> git checkout e76ec930bbe0906735fa147736ab051a8e256b1b
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> All errors (new ones prefixed by >>):
>
> mm/kasan/common.c: In function 'kasan_module_alloc':
> >> mm/kasan/common.c:481:17: error: 'KASAN_SHADOW_INIT' undeclared (first use in this function); did you mean 'KASAN_SHADOW_END'?
> __memset(ret, KASAN_SHADOW_INIT, shadow_size);
> ^~~~~~~~~~~~~~~~~
> KASAN_SHADOW_END
> mm/kasan/common.c:481:17: note: each undeclared identifier is reported only once for each function it appears in
>
> vim +481 mm/kasan/common.c
Will fix in v13.
>
> 459
> 460 int kasan_module_alloc(void *addr, size_t size)
> 461 {
> 462 void *ret;
> 463 size_t scaled_size;
> 464 size_t shadow_size;
> 465 unsigned long shadow_start;
> 466
> 467 shadow_start = (unsigned long)kasan_mem_to_shadow(addr);
> 468 scaled_size = (size + KASAN_SHADOW_MASK) >> KASAN_SHADOW_SCALE_SHIFT;
> 469 shadow_size = round_up(scaled_size, PAGE_SIZE);
> 470
> 471 if (WARN_ON(!PAGE_ALIGNED(shadow_start)))
> 472 return -EINVAL;
> 473
> 474 ret = __vmalloc_node_range(shadow_size, 1, shadow_start,
> 475 shadow_start + shadow_size,
> 476 GFP_KERNEL,
> 477 PAGE_KERNEL, VM_NO_GUARD, NUMA_NO_NODE,
> 478 __builtin_return_address(0));
> 479
> 480 if (ret) {
> > 481 __memset(ret, KASAN_SHADOW_INIT, shadow_size);
> 482 find_vm_area(addr)->flags |= VM_KASAN;
> 483 kmemleak_ignore(ret);
> 484 return 0;
> 485 }
> 486
> 487 return -ENOMEM;
> 488 }
> 489
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
