On Tue, Nov 06, 2018 at 06:30:23PM +0100, Andrey Konovalov wrote: > --- a/arch/arm64/include/asm/memory.h > +++ b/arch/arm64/include/asm/memory.h > @@ -92,6 +92,15 @@ > #define KASAN_THREAD_SHIFT 0 > #endif > > +#ifdef CONFIG_KASAN_SW_TAGS > +#define KASAN_TAG_SHIFTED(tag) ((unsigned long)(tag) << 56) > +#define KASAN_SET_TAG(addr, tag) (((addr) & ~KASAN_TAG_SHIFTED(0xff)) | \ > + KASAN_TAG_SHIFTED(tag)) > +#define KASAN_RESET_TAG(addr) KASAN_SET_TAG(addr, 0xff) > +#else > +#define KASAN_RESET_TAG(addr) addr > +#endif I think we should reuse the untagged_addr() macro we have in uaccess.h (make it more general and move to another header file). -- Catalin
