diff options
Diffstat (limited to 'mm/kasan/report_generic.c')
| -rw-r--r-- | mm/kasan/report_generic.c | 46 |
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, |