1 files changed, 24 insertions, 0 deletions
diff --git a/mm/kasan/tags_report.c b/mm/kasan/tags_report.c
index 8eaf5f722271..969ae08f59d7 100644
--- a/mm/kasan/tags_report.c
+++ b/mm/kasan/tags_report.c
@@ -36,6 +36,30 @@
 
 const char *get_bug_type(struct kasan_access_info *info)
 {
+#ifdef CONFIG_KASAN_SW_TAGS_IDENTIFY
+	struct kasan_alloc_meta *alloc_meta;
+	struct kmem_cache *cache;
+	struct page *page;
+	const void *addr;
+	void *object;
+	u8 tag;
+	int i;
+
+	tag = get_tag(info->access_addr);
+	addr = reset_tag(info->access_addr);
+	page = kasan_addr_to_page(addr);
+	if (page && PageSlab(page)) {
+		cache = page->slab_cache;
+		object = nearest_obj(cache, page, (void *)addr);
+		alloc_meta = get_alloc_info(cache, object);
+
+		for (i = 0; i < KASAN_NR_FREE_STACKS; i++)
+			if (alloc_meta->free_pointer_tag[i] == tag)
+				return "use-after-free";
+		return "out-of-bounds";
+	}
+
+#endif
 	return "invalid-access";
 }