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Diffstat (limited to 'mm/kasan/common.c')
-rw-r--r--mm/kasan/common.c41
1 files changed, 4 insertions, 37 deletions
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 757d4074fe28..950fd372a07e 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -40,7 +40,7 @@
#include "kasan.h"
#include "../slab.h"
-static inline depot_stack_handle_t save_stack(gfp_t flags)
+depot_stack_handle_t kasan_save_stack(gfp_t flags)
{
unsigned long entries[KASAN_STACK_DEPTH];
unsigned int nr_entries;
@@ -50,10 +50,10 @@ static inline depot_stack_handle_t save_stack(gfp_t flags)
return stack_depot_save(entries, nr_entries, flags);
}
-static inline void set_track(struct kasan_track *track, gfp_t flags)
+void kasan_set_track(struct kasan_track *track, gfp_t flags)
{
track->pid = current->pid;
- track->stack = save_stack(flags);
+ track->stack = kasan_save_stack(flags);
}
void kasan_enable_current(void)
@@ -180,21 +180,6 @@ asmlinkage void kasan_unpoison_task_stack_below(const void *watermark)
kasan_unpoison_shadow(base, watermark - base);
}
-/*
- * Clear all poison for the region between the current SP and a provided
- * watermark value, as is sometimes required prior to hand-crafted asm function
- * returns in the middle of functions.
- */
-void kasan_unpoison_stack_above_sp_to(const void *watermark)
-{
- const void *sp = __builtin_frame_address(0);
- size_t size = watermark - sp;
-
- if (WARN_ON(sp > watermark))
- return;
- kasan_unpoison_shadow(sp, size);
-}
-
void kasan_alloc_pages(struct page *page, unsigned int order)
{
u8 tag;
@@ -298,24 +283,6 @@ struct kasan_free_meta *get_free_info(struct kmem_cache *cache,
return (void *)object + cache->kasan_info.free_meta_offset;
}
-
-static void kasan_set_free_info(struct kmem_cache *cache,
- void *object, u8 tag)
-{
- struct kasan_alloc_meta *alloc_meta;
- u8 idx = 0;
-
- alloc_meta = get_alloc_info(cache, object);
-
-#ifdef CONFIG_KASAN_SW_TAGS_IDENTIFY
- idx = alloc_meta->free_track_idx;
- alloc_meta->free_pointer_tag[idx] = tag;
- alloc_meta->free_track_idx = (idx + 1) % KASAN_NR_FREE_STACKS;
-#endif
-
- set_track(&alloc_meta->free_track[idx], GFP_NOWAIT);
-}
-
void kasan_poison_slab(struct page *page)
{
unsigned long i;
@@ -491,7 +458,7 @@ static void *__kasan_kmalloc(struct kmem_cache *cache, const void *object,
KASAN_KMALLOC_REDZONE);
if (cache->flags & SLAB_KASAN)
- set_track(&get_alloc_info(cache, object)->alloc_track, flags);
+ kasan_set_track(&get_alloc_info(cache, object)->alloc_track, flags);
return set_tag(object, tag);
}