__OBJECT_POISON
if (s->flags & __OBJECT_POISON) {
if (val != SLUB_RED_ACTIVE && (s->flags & __OBJECT_POISON)) {
if (!kmem_cache_debug_flags(s, SLAB_STORE_USER|SLAB_RED_ZONE|__OBJECT_POISON))
s->flags |= __OBJECT_POISON;
s->flags &= ~__OBJECT_POISON;