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| author | Andrey Konovalov <andreyknvl@google.com> | 2022-09-05 23:05:23 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-03 14:02:57 -0700 |
| commit | 836daba099472baaa8b6a57772e8bb2d55f1f9d7 (patch) | |
| tree | cee6c0a75707420f4243e36dd5227e3097f4ddec /mm/kasan/generic.c | |
| parent | f3647cbfe5a34af1a22f2627dda5fb078a47f0d3 (diff) | |
| download | linux-836daba099472baaa8b6a57772e8bb2d55f1f9d7.tar.gz linux-836daba099472baaa8b6a57772e8bb2d55f1f9d7.tar.bz2 linux-836daba099472baaa8b6a57772e8bb2d55f1f9d7.zip | |
kasan: introduce kasan_init_object_meta
Add a kasan_init_object_meta() helper that initializes metadata for a slab
object and use it in the common code.
For now, the implementations of this helper are the same for the Generic
and tag-based modes, but they will diverge later in the series.
This change hides references to alloc_meta from the common code. This is
desired as only the Generic mode will be using per-object metadata after
this series.
Link: https://lkml.kernel.org/r/47c12938fc7f8105e7aaa592527c0e9d3c81fc37.1662411799.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/generic.c')
| -rw-r--r-- | mm/kasan/generic.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c index f212b9ae57b5..5462ddbc21e6 100644 --- a/mm/kasan/generic.c +++ b/mm/kasan/generic.c @@ -328,6 +328,15 @@ DEFINE_ASAN_SET_SHADOW(f3); DEFINE_ASAN_SET_SHADOW(f5); DEFINE_ASAN_SET_SHADOW(f8); +void kasan_init_object_meta(struct kmem_cache *cache, const void *object) +{ + struct kasan_alloc_meta *alloc_meta; + + alloc_meta = kasan_get_alloc_meta(cache, object); + if (alloc_meta) + __memset(alloc_meta, 0, sizeof(*alloc_meta)); +} + static void __kasan_record_aux_stack(void *addr, bool can_alloc) { struct slab *slab = kasan_addr_to_slab(addr); |