On Mon, 13 Jun 2022 at 22:15, <andrey.konovalov@xxxxxxxxx> wrote:
>
> From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
>
> Provide standalone implementations of save_alloc_info() for the Generic
> and tag-based modes.
>
> For now, the implementations are the same, but they will diverge later
> in the series.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
> ---
> mm/kasan/common.c | 13 ++-----------
> mm/kasan/generic.c | 9 +++++++++
> mm/kasan/kasan.h | 1 +
> mm/kasan/tags.c | 9 +++++++++
> 4 files changed, 21 insertions(+), 11 deletions(-)
>
> diff --git a/mm/kasan/common.c b/mm/kasan/common.c
> index a6107e8375e0..2848c7a2402a 100644
> --- a/mm/kasan/common.c
> +++ b/mm/kasan/common.c
> @@ -423,15 +423,6 @@ void __kasan_slab_free_mempool(void *ptr, unsigned long ip)
> }
> }
>
> -static void save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
> -{
> - struct kasan_alloc_meta *alloc_meta;
> -
> - alloc_meta = kasan_get_alloc_meta(cache, object);
> - if (alloc_meta)
> - kasan_set_track(&alloc_meta->alloc_track, flags);
> -}
> -
> void * __must_check __kasan_slab_alloc(struct kmem_cache *cache,
> void *object, gfp_t flags, bool init)
> {
> @@ -462,7 +453,7 @@ void * __must_check __kasan_slab_alloc(struct kmem_cache *cache,
>
> /* Save alloc info (if possible) for non-kmalloc() allocations. */
> if (kasan_stack_collection_enabled() && !cache->kasan_info.is_kmalloc)
> - save_alloc_info(cache, (void *)object, flags);
> + kasan_save_alloc_info(cache, (void *)object, flags);
>
> return tagged_object;
> }
> @@ -508,7 +499,7 @@ static inline void *____kasan_kmalloc(struct kmem_cache *cache,
> * This also rewrites the alloc info when called from kasan_krealloc().
> */
> if (kasan_stack_collection_enabled() && cache->kasan_info.is_kmalloc)
> - save_alloc_info(cache, (void *)object, flags);
> + kasan_save_alloc_info(cache, (void *)object, flags);
>
> /* Keep the tag that was set by kasan_slab_alloc(). */
> return (void *)object;
> diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c
> index 03a3770cfeae..98c451a3b01f 100644
> --- a/mm/kasan/generic.c
> +++ b/mm/kasan/generic.c
> @@ -358,6 +358,15 @@ void kasan_record_aux_stack_noalloc(void *addr)
> return __kasan_record_aux_stack(addr, false);
> }
>
> +void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
> +{
> + struct kasan_alloc_meta *alloc_meta;
> +
> + alloc_meta = kasan_get_alloc_meta(cache, object);
> + if (alloc_meta)
> + kasan_set_track(&alloc_meta->alloc_track, flags);
> +}
> +
> void kasan_save_free_info(struct kmem_cache *cache,
> void *object, u8 tag)
> {
> diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
> index 6df8d7b01073..610057e651d2 100644
> --- a/mm/kasan/kasan.h
> +++ b/mm/kasan/kasan.h
> @@ -284,6 +284,7 @@ struct slab *kasan_addr_to_slab(const void *addr);
>
> depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc);
> void kasan_set_track(struct kasan_track *track, gfp_t flags);
> +void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags);
> void kasan_save_free_info(struct kmem_cache *cache, void *object, u8 tag);
> struct kasan_track *kasan_get_free_track(struct kmem_cache *cache,
> void *object, u8 tag);
> diff --git a/mm/kasan/tags.c b/mm/kasan/tags.c
> index b453a353bc86..1ba3c8399f72 100644
> --- a/mm/kasan/tags.c
> +++ b/mm/kasan/tags.c
> @@ -17,6 +17,15 @@
>
> #include "kasan.h"
>
> +void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
> +{
> + struct kasan_alloc_meta *alloc_meta;
> +
> + alloc_meta = kasan_get_alloc_meta(cache, object);
> + if (alloc_meta)
> + kasan_set_track(&alloc_meta->alloc_track, flags);
> +}
> +
> void kasan_save_free_info(struct kmem_cache *cache,
> void *object, u8 tag)
> {
> --
> 2.25.1
>
> --
> You received this message because you are subscribed to the Google Groups "kasan-dev" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to kasan-dev+unsubscribe@xxxxxxxxxxxxxxxx.
> To view this discussion on the web visit https://groups.google.com/d/msgid/kasan-dev/ae1389c0717d1875077ee3f6cd4beb5b7e046ae0.1655150842.git.andreyknvl%40google.com.
