From 80a9201a5965f4715d5c09790862e0df84ce0614 Mon Sep 17 00:00:00 2001 From: Alexander Potapenko Date: Thu, 28 Jul 2016 15:49:07 -0700 Subject: mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB For KASAN builds: - switch SLUB allocator to using stackdepot instead of storing the allocation/deallocation stacks in the objects; - change the freelist hook so that parts of the freelist can be put into the quarantine. [aryabinin@virtuozzo.com: fixes] Link: http://lkml.kernel.org/r/1468601423-28676-1-git-send-email-aryabinin@virtuozzo.com Link: http://lkml.kernel.org/r/1468347165-41906-3-git-send-email-glider@google.com Signed-off-by: Alexander Potapenko Cc: Andrey Konovalov Cc: Christoph Lameter Cc: Dmitry Vyukov Cc: Steven Rostedt (Red Hat) Cc: Joonsoo Kim Cc: Kostya Serebryany Cc: Andrey Ryabinin Cc: Kuthonuzo Luruo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/kasan.h | 2 ++ include/linux/slab_def.h | 3 ++- include/linux/slub_def.h | 4 ++++ 3 files changed, 8 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/kasan.h b/include/linux/kasan.h index ac4b3c46a84d..c9cf374445d8 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -77,6 +77,7 @@ void kasan_free_shadow(const struct vm_struct *vm); size_t ksize(const void *); static inline void kasan_unpoison_slab(const void *ptr) { ksize(ptr); } +size_t kasan_metadata_size(struct kmem_cache *cache); #else /* CONFIG_KASAN */ @@ -121,6 +122,7 @@ static inline int kasan_module_alloc(void *addr, size_t size) { return 0; } static inline void kasan_free_shadow(const struct vm_struct *vm) {} static inline void kasan_unpoison_slab(const void *ptr) { } +static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; } #endif /* CONFIG_KASAN */ diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h index 339ba027ade9..4ad2c5a26399 100644 --- a/include/linux/slab_def.h +++ b/include/linux/slab_def.h @@ -88,7 +88,8 @@ struct kmem_cache { }; static inline void *nearest_obj(struct kmem_cache *cache, struct page *page, - void *x) { + void *x) +{ void *object = x - (x - page->s_mem) % cache->size; void *last_object = page->s_mem + (cache->num - 1) * cache->size; diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index cf501cf8e6db..75f56c2ef2d4 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -104,6 +104,10 @@ struct kmem_cache { unsigned int *random_seq; #endif +#ifdef CONFIG_KASAN + struct kasan_cache kasan_info; +#endif + struct kmem_cache_node *node[MAX_NUMNODES]; }; -- cgit v1.2.3