On Tue, Feb 18, 2025 at 9:20 AM Maciej Wieczor-Retman <maciej.wieczor-retman@xxxxxxxxx> wrote: > > Adjust x86 minimal SLAB alignment to match KASAN granularity size. In > tag-based mode the size changes to 16 bytes so the value needs to be 4. This 4 should be 16. > > Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@xxxxxxxxx> > --- > arch/x86/include/asm/kasan.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/x86/include/asm/kasan.h b/arch/x86/include/asm/kasan.h > index 8829337a75fa..a75f0748a4b6 100644 > --- a/arch/x86/include/asm/kasan.h > +++ b/arch/x86/include/asm/kasan.h > @@ -36,6 +36,8 @@ > > #ifdef CONFIG_KASAN_SW_TAGS > > +#define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT) I believe ARCH_SLAB_MINALIGN needs to be defined in include/asm/cache.h: at least other architectures have it there. > + > #define __tag_shifted(tag) FIELD_PREP(GENMASK_ULL(60, 57), tag) > #define __tag_reset(addr) (sign_extend64((u64)(addr), 56)) > #define __tag_get(addr) ((u8)FIELD_GET(GENMASK_ULL(60, 57), (u64)addr)) > -- > 2.47.1 >
