+#ifdef CONFIG_SLAB
+static void print_track(struct kasan_track *track)
+{
+ pr_err("PID = %u, CPU = %u, timestamp = %lu\n", track->pid,
+ track->cpu, (unsigned long)track->when);
+}
+
+static void object_err(struct kmem_cache *cache, struct page *page,
+ void *object, char *unused_reason)
+{
+ struct kasan_alloc_meta *alloc_info = get_alloc_info(cache, object);
+ struct kasan_free_meta *free_info;
+
+ dump_stack();
+ pr_err("Object at %p, in cache %s\n", object, cache->name);
+ if (!(cache->flags & SLAB_KASAN))
+ return;
+ switch (alloc_info->state) {
+ case KASAN_STATE_INIT:
+ pr_err("Object not allocated yet\n");
+ break;
+ case KASAN_STATE_ALLOC:
+ pr_err("Object allocated with size %u bytes.\n",
+ alloc_info->alloc_size);
+ pr_err("Allocation:\n");
+ print_track(&alloc_info->track);
+ break;
+ case KASAN_STATE_FREE:
+ pr_err("Object freed, allocated with size %u bytes\n",
+ alloc_info->alloc_size);
+ free_info = get_free_info(cache, object);
+ pr_err("Allocation:\n");
+ print_track(&alloc_info->track);
+ pr_err("Deallocation:\n");
+ print_track(&free_info->track);
+ break;
+ }
+}
+#endif
+