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kasan: pass tagged pointers to kasan_save_alloc/free_info
Pass tagged pointers to kasan_save_alloc/free_info(). This is a preparatory patch to simplify other changes in the series. Link: https://lkml.kernel.org/r/d5bc48cfcf0dca8269dc3ed863047e4d4d2030f1.1662411799.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>
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4 changed files with 5 additions and 9 deletions
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@ -193,13 +193,11 @@ void * __must_check __kasan_init_slab_obj(struct kmem_cache *cache,
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static inline bool ____kasan_slab_free(struct kmem_cache *cache, void *object,
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unsigned long ip, bool quarantine, bool init)
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{
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u8 tag;
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void *tagged_object;
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if (!kasan_arch_is_ready())
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return false;
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tag = get_tag(object);
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tagged_object = object;
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object = kasan_reset_tag(object);
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@ -228,7 +226,7 @@ static inline bool ____kasan_slab_free(struct kmem_cache *cache, void *object,
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return false;
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if (kasan_stack_collection_enabled())
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kasan_save_free_info(cache, object, tag);
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kasan_save_free_info(cache, tagged_object);
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return kasan_quarantine_put(cache, object);
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}
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@ -317,7 +315,7 @@ void * __must_check __kasan_slab_alloc(struct kmem_cache *cache,
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/* Save alloc info (if possible) for non-kmalloc() allocations. */
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if (kasan_stack_collection_enabled() && !cache->kasan_info.is_kmalloc)
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kasan_save_alloc_info(cache, (void *)object, flags);
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kasan_save_alloc_info(cache, tagged_object, flags);
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return tagged_object;
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}
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@ -500,8 +500,7 @@ void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
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kasan_set_track(&alloc_meta->alloc_track, flags);
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}
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void kasan_save_free_info(struct kmem_cache *cache,
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void *object, u8 tag)
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void kasan_save_free_info(struct kmem_cache *cache, void *object)
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{
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struct kasan_free_meta *free_meta;
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@ -309,7 +309,7 @@ static inline void kasan_init_object_meta(struct kmem_cache *cache, const void *
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depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc);
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void kasan_set_track(struct kasan_track *track, gfp_t flags);
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void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags);
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void kasan_save_free_info(struct kmem_cache *cache, void *object, u8 tag);
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void kasan_save_free_info(struct kmem_cache *cache, void *object);
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struct kasan_track *kasan_get_alloc_track(struct kmem_cache *cache,
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void *object);
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struct kasan_track *kasan_get_free_track(struct kmem_cache *cache,
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@ -21,8 +21,7 @@ void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
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{
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}
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void kasan_save_free_info(struct kmem_cache *cache,
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void *object, u8 tag)
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void kasan_save_free_info(struct kmem_cache *cache, void *object)
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{
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}
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