Hi Sergey, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] [also build test ERROR on net/master linus/master v5.5-rc5 next-20200109] [cannot apply to xen-tip/linux-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Sergey-Dyasli/basic-KASAN-support-for-Xen-PV-domains/20200110-042623 base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 4a4a52d49d11f5c4a0df8b9806c8c5563801f753 config: x86_64-rhel (attached as .config) compiler: gcc-7 (Debian 7.5.0-3) 7.5.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot All errors (new ones prefixed by >>): arch/x86/xen/mmu_pv.c: In function 'xen_pv_kasan_early_init': >> arch/x86/xen/mmu_pv.c:1778:16: error: 'kasan_early_shadow_pud' undeclared (first use in this function); did you mean 'kasan_free_shadow'? set_page_prot(kasan_early_shadow_pud, PAGE_KERNEL_RO); ^~~~~~~~~~~~~~~~~~~~~~ kasan_free_shadow arch/x86/xen/mmu_pv.c:1778:16: note: each undeclared identifier is reported only once for each function it appears in >> arch/x86/xen/mmu_pv.c:1779:16: error: 'kasan_early_shadow_pmd' undeclared (first use in this function); did you mean 'kasan_early_shadow_pud'? set_page_prot(kasan_early_shadow_pmd, PAGE_KERNEL_RO); ^~~~~~~~~~~~~~~~~~~~~~ kasan_early_shadow_pud >> arch/x86/xen/mmu_pv.c:1780:16: error: 'kasan_early_shadow_pte' undeclared (first use in this function); did you mean 'kasan_early_shadow_pmd'? set_page_prot(kasan_early_shadow_pte, PAGE_KERNEL_RO); ^~~~~~~~~~~~~~~~~~~~~~ kasan_early_shadow_pmd vim +1778 arch/x86/xen/mmu_pv.c 1774 1775 pgd_t * __init xen_pv_kasan_early_init(void) 1776 { 1777 /* PV page tables must be read-only */ > 1778 set_page_prot(kasan_early_shadow_pud, PAGE_KERNEL_RO); > 1779 set_page_prot(kasan_early_shadow_pmd, PAGE_KERNEL_RO); > 1780 set_page_prot(kasan_early_shadow_pte, PAGE_KERNEL_RO); 1781 1782 /* Return a pointer to the initial PV page tables */ 1783 return (pgd_t *)xen_start_info->pt_base; 1784 } 1785 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation