コード例 #1
0
ファイル: kasan.c プロジェクト: faddat/linux-mainline-next
void kasan_kmalloc(struct kmem_cache *cache, const void *object, size_t size,
		   gfp_t flags)
{
	unsigned long redzone_start;
	unsigned long redzone_end;

#ifdef CONFIG_SLAB
	if (flags & __GFP_RECLAIM)
		quarantine_reduce();
#endif

	if (unlikely(object == NULL))
		return;

	redzone_start = round_up((unsigned long)(object + size),
				KASAN_SHADOW_SCALE_SIZE);
	redzone_end = round_up((unsigned long)object + cache->object_size,
				KASAN_SHADOW_SCALE_SIZE);

	kasan_unpoison_shadow(object, size);
	kasan_poison_shadow((void *)redzone_start, redzone_end - redzone_start,
		KASAN_KMALLOC_REDZONE);
#ifdef CONFIG_SLAB
	if (cache->flags & SLAB_KASAN) {
		struct kasan_alloc_meta *alloc_info =
			get_alloc_info(cache, object);

		alloc_info->state = KASAN_STATE_ALLOC;
		alloc_info->alloc_size = size;
		set_track(&alloc_info->track, flags);
	}
#endif
}
コード例 #2
0
ファイル: kasan.c プロジェクト: mkrufky/linux
void kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags)
{
	struct page *page;
	unsigned long redzone_start;
	unsigned long redzone_end;

	if (gfpflags_allow_blocking(flags))
		quarantine_reduce();

	if (unlikely(ptr == NULL))
		return;

	page = virt_to_page(ptr);
	redzone_start = round_up((unsigned long)(ptr + size),
				KASAN_SHADOW_SCALE_SIZE);
	redzone_end = (unsigned long)ptr + (PAGE_SIZE << compound_order(page));

	kasan_unpoison_shadow(ptr, size);
	kasan_poison_shadow((void *)redzone_start, redzone_end - redzone_start,
		KASAN_PAGE_REDZONE);
}
コード例 #3
0
ファイル: kasan.c プロジェクト: mkrufky/linux
void kasan_kmalloc(struct kmem_cache *cache, const void *object, size_t size,
		   gfp_t flags)
{
	unsigned long redzone_start;
	unsigned long redzone_end;

	if (gfpflags_allow_blocking(flags))
		quarantine_reduce();

	if (unlikely(object == NULL))
		return;

	redzone_start = round_up((unsigned long)(object + size),
				KASAN_SHADOW_SCALE_SIZE);
	redzone_end = round_up((unsigned long)object + cache->object_size,
				KASAN_SHADOW_SCALE_SIZE);

	kasan_unpoison_shadow(object, size);
	kasan_poison_shadow((void *)redzone_start, redzone_end - redzone_start,
		KASAN_KMALLOC_REDZONE);

	if (cache->flags & SLAB_KASAN)
		set_track(&get_alloc_info(cache, object)->alloc_track, flags);
}