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authorAndrey Konovalov <andreyknvl@google.com>2020-12-22 12:03:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-22 12:55:09 -0800
commit57345fa68a2769e3bd2b6ca01794fba74e6fa938 (patch)
treeebb51bfc4c92c80f7d8ed68ddb6f9c716b67ce7d /mm/kasan/kasan.h
parentbffe690708c8b4fdb8f0bff8ff22b347fc6c709a (diff)
kasan: inline (un)poison_range and check_invalid_free
Using (un)poison_range() or check_invalid_free() currently results in function calls. Move their definitions to mm/kasan/kasan.h and turn them into static inline functions for hardware tag-based mode to avoid unneeded function calls. Link: https://lkml.kernel.org/r/7007955b69eb31b5376a7dc1e0f4ac49138504f2.1606162397.git.andreyknvl@google.com Link: https://linux-review.googlesource.com/id/Ia9d8191024a12d1374675b3d27197f10193f50bb Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Reviewed-by: Marco Elver <elver@google.com> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Branislav Rankov <Branislav.Rankov@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Evgenii Stepanov <eugenis@google.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan/kasan.h')
-rw-r--r--mm/kasan/kasan.h36
1 files changed, 31 insertions, 5 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 7876a2547b7d..6e811d0f6242 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -154,9 +154,6 @@ struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache,
struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache,
const void *object);
-void poison_range(const void *address, size_t size, u8 value);
-void unpoison_range(const void *address, size_t size);
-
#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
static inline const void *kasan_shadow_to_mem(const void *shadow_addr)
@@ -196,8 +193,6 @@ void print_tags(u8 addr_tag, const void *addr);
static inline void print_tags(u8 addr_tag, const void *addr) { }
#endif
-bool check_invalid_free(void *addr);
-
void *find_first_bad_addr(void *addr, size_t size);
const char *get_bug_type(struct kasan_access_info *info);
void metadata_fetch_row(char *buffer, void *row);
@@ -278,6 +273,37 @@ static inline u8 random_tag(void) { return hw_get_random_tag(); }
static inline u8 random_tag(void) { return 0; }
#endif
+#ifdef CONFIG_KASAN_HW_TAGS
+
+static inline void poison_range(const void *address, size_t size, u8 value)
+{
+ hw_set_mem_tag_range(kasan_reset_tag(address),
+ round_up(size, KASAN_GRANULE_SIZE), value);
+}
+
+static inline void unpoison_range(const void *address, size_t size)
+{
+ hw_set_mem_tag_range(kasan_reset_tag(address),
+ round_up(size, KASAN_GRANULE_SIZE), get_tag(address));
+}
+
+static inline bool check_invalid_free(void *addr)
+{
+ u8 ptr_tag = get_tag(addr);
+ u8 mem_tag = hw_get_mem_tag(addr);
+
+ return (mem_tag == KASAN_TAG_INVALID) ||
+ (ptr_tag != KASAN_TAG_KERNEL && ptr_tag != mem_tag);
+}
+
+#else /* CONFIG_KASAN_HW_TAGS */
+
+void poison_range(const void *address, size_t size, u8 value);
+void unpoison_range(const void *address, size_t size);
+bool check_invalid_free(void *addr);
+
+#endif /* CONFIG_KASAN_HW_TAGS */
+
/*
* Exported functions for interfaces called from assembly or from generated
* code. Declarations here to avoid warning about missing declarations.