1 files changed, 45 insertions, 1 deletions

diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c
index 6689fb9a919b..043c94b04605 100644
--- a/mm/kasan/report_generic.c
+++ b/mm/kasan/report_generic.c
@@ -109,7 +109,7 @@ static const char *get_wild_bug_type(struct kasan_report_info *info)
 	return bug_type;
 }
 
-const char *kasan_get_bug_type(struct kasan_report_info *info)
+static const char *get_bug_type(struct kasan_report_info *info)
 {
 	/*
 	 * If access_size is a negative number, then it has reason to be
@@ -127,11 +127,55 @@ const char *kasan_get_bug_type(struct kasan_report_info *info)
 	return get_wild_bug_type(info);
 }
 
+void kasan_complete_mode_report_info(struct kasan_report_info *info)
+{
+	struct kasan_alloc_meta *alloc_meta;
+	struct kasan_free_meta *free_meta;
+
+	if (!info->bug_type)
+		info->bug_type = get_bug_type(info);
+
+	if (!info->cache || !info->object)
+		return;
+
+	alloc_meta = kasan_get_alloc_meta(info->cache, info->object);
+	if (alloc_meta)
+		memcpy(&info->alloc_track, &alloc_meta->alloc_track,
+		       sizeof(info->alloc_track));
+
+	if (*(u8 *)kasan_mem_to_shadow(info->object) == KASAN_SLAB_FREETRACK) {
+		/* Free meta must be present with KASAN_SLAB_FREETRACK. */
+		free_meta = kasan_get_free_meta(info->cache, info->object);
+		memcpy(&info->free_track, &free_meta->free_track,
+		       sizeof(info->free_track));
+	}
+}
+
 void kasan_metadata_fetch_row(char *buffer, void *row)
 {
 	memcpy(buffer, kasan_mem_to_shadow(row), META_BYTES_PER_ROW);
 }
 
+void kasan_print_aux_stacks(struct kmem_cache *cache, const void *object)
+{
+	struct kasan_alloc_meta *alloc_meta;
+
+	alloc_meta = kasan_get_alloc_meta(cache, object);
+	if (!alloc_meta)
+		return;
+
+	if (alloc_meta->aux_stack[0]) {
+		pr_err("Last potentially related work creation:\n");
+		stack_depot_print(alloc_meta->aux_stack[0]);
+		pr_err("\n");
+	}
+	if (alloc_meta->aux_stack[1]) {
+		pr_err("Second to last potentially related work creation:\n");
+		stack_depot_print(alloc_meta->aux_stack[1]);
+		pr_err("\n");
+	}
+}
+
 #ifdef CONFIG_KASAN_STACK
 static bool __must_check tokenize_frame_descr(const char **frame_descr,
 					      char *token, size_t max_tok_len,