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| author | Andrey Konovalov <andreyknvl@google.com> | 2022-09-06 00:05:21 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-04 00:02:57 +0300 |
| commit | 88f29765ae3b00f8b9362f299f6140cd9b988f75 (patch) | |
| tree | df4cd4196ace95b948bf8a8d0399bca2cf9e2418 /mm/kasan/report_generic.c | |
| parent | 687c85afa67a635dae683cf0ab6012e76333065b (diff) | |
| download | linux-88f29765ae3b00f8b9362f299f6140cd9b988f75.tar.xz | |
kasan: introduce kasan_print_aux_stacks
Add a kasan_print_aux_stacks() helper that prints the auxiliary stack
traces for the Generic mode.
This change hides references to alloc_meta from the common reporting code.
This is desired as only the Generic mode will be using per-object
metadata after this series.
Link: https://lkml.kernel.org/r/67c7a9ea6615533762b1f8ccc267cd7f9bafb749.1662411799.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Peter Collingbourne <pcc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/kasan/report_generic.c')
| -rw-r--r-- | mm/kasan/report_generic.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c index 6689fb9a919b..348dc207d462 100644 --- a/mm/kasan/report_generic.c +++ b/mm/kasan/report_generic.c @@ -132,6 +132,26 @@ 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, |