diff options
Diffstat (limited to 'mm/kasan')
| -rw-r--r-- | mm/kasan/common.c | 13 | ||||
| -rw-r--r-- | mm/kasan/kasan.h | 3 | ||||
| -rw-r--r-- | mm/kasan/quarantine.c | 7 | ||||
| -rw-r--r-- | mm/kasan/report.c | 1 |
4 files changed, 4 insertions, 20 deletions
diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 223af53d4338..610efae91220 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -174,10 +174,6 @@ void __kasan_poison_new_object(struct kmem_cache *cache, void *object) * 2. A cache might be SLAB_TYPESAFE_BY_RCU, which means objects can be * accessed after being freed. We preassign tags for objects in these * caches as well. - * 3. For SLAB allocator we can't preassign tags randomly since the freelist - * is stored as an array of indexes instead of a linked list. Assign tags - * based on objects indexes, so that objects that are next to each other - * get different tags. */ static inline u8 assign_tag(struct kmem_cache *cache, const void *object, bool init) @@ -192,17 +188,12 @@ static inline u8 assign_tag(struct kmem_cache *cache, if (!cache->ctor && !(cache->flags & SLAB_TYPESAFE_BY_RCU)) return init ? KASAN_TAG_KERNEL : kasan_random_tag(); - /* For caches that either have a constructor or SLAB_TYPESAFE_BY_RCU: */ -#ifdef CONFIG_SLAB - /* For SLAB assign tags based on the object index in the freelist. */ - return (u8)obj_to_index(cache, virt_to_slab(object), (void *)object); -#else /* - * For SLUB assign a random tag during slab creation, otherwise reuse + * For caches that either have a constructor or SLAB_TYPESAFE_BY_RCU, + * assign a random tag during slab creation, otherwise reuse * the already assigned tag. */ return init ? kasan_random_tag() : get_tag(object); -#endif } void * __must_check __kasan_init_slab_obj(struct kmem_cache *cache, diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 645ae04539c9..d0f172f2b978 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -410,8 +410,7 @@ void kasan_save_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); -#if defined(CONFIG_KASAN_GENERIC) && \ - (defined(CONFIG_SLAB) || defined(CONFIG_SLUB)) +#ifdef CONFIG_KASAN_GENERIC bool kasan_quarantine_put(struct kmem_cache *cache, void *object); void kasan_quarantine_reduce(void); void kasan_quarantine_remove_cache(struct kmem_cache *cache); diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c index 8afa77bc5d3b..3ba02efb952a 100644 --- a/mm/kasan/quarantine.c +++ b/mm/kasan/quarantine.c @@ -144,7 +144,6 @@ static void qlink_free(struct qlist_node *qlink, struct kmem_cache *cache) { void *object = qlink_to_object(qlink, cache); struct kasan_free_meta *free_meta = kasan_get_free_meta(cache, object); - unsigned long flags; kasan_release_object_meta(cache, object); @@ -158,13 +157,7 @@ static void qlink_free(struct qlist_node *qlink, struct kmem_cache *cache) cache->kasan_info.free_meta_offset == 0) memzero_explicit(free_meta, sizeof(*free_meta)); - if (IS_ENABLED(CONFIG_SLAB)) - local_irq_save(flags); - ___cache_free(cache, object, _THIS_IP_); - - if (IS_ENABLED(CONFIG_SLAB)) - local_irq_restore(flags); } static void qlist_free_all(struct qlist_head *q, struct kmem_cache *cache) diff --git a/mm/kasan/report.c b/mm/kasan/report.c index 4bc7ac9fb37d..7afa4feb03e1 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -23,6 +23,7 @@ #include <linux/stacktrace.h> #include <linux/string.h> #include <linux/types.h> +#include <linux/vmalloc.h> #include <linux/kasan.h> #include <linux/module.h> #include <linux/sched/task_stack.h> |