On Thu, May 25, 2017 at 11:33:33PM +0300, Kirill A. Shutemov wrote: > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 0bf81e837cbf..c795207d8a3c 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -100,7 +100,7 @@ config X86 > select HAVE_ARCH_AUDITSYSCALL > select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE > select HAVE_ARCH_JUMP_LABEL > - select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP > + select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP > && !X86_5LEVEL > select HAVE_ARCH_KGDB > select HAVE_ARCH_KMEMCHECK > select HAVE_ARCH_MMAP_RND_BITS if MMU
Looks like KASAN will be a problem for boot-time paging mode switching. It wants to know CONFIG_KASAN_SHADOW_OFFSET at compile-time to pass to gcc -fasan-shadow-offset=. But this value varies between paging modes... I don't see how to solve it. Folks, any ideas? -- Kirill A. Shutemov
