On Tue, Nov 10, 2020 at 11:20PM +0100, 'Andrey Konovalov' via kasan-dev wrote: > Using kasan_poison_memory() 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. > > Signed-off-by: Andrey Konovalov <[email protected]> > Reviewed-by: Dmitry Vyukov <[email protected]> > Link: > https://linux-review.googlesource.com/id/Ia9d8191024a12d1374675b3d27197f10193f50bb > --- > mm/kasan/hw_tags.c | 15 --------------- > mm/kasan/kasan.h | 28 ++++++++++++++++++++++++---- > 2 files changed, 24 insertions(+), 19 deletions(-)
Reviewed-by: Marco Elver <[email protected]> > diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c > index 1476ac07666e..0303e49904b4 100644 > --- a/mm/kasan/hw_tags.c > +++ b/mm/kasan/hw_tags.c > @@ -30,27 +30,12 @@ void kasan_init_hw_tags(void) > pr_info("KernelAddressSanitizer initialized\n"); > } > > -void kasan_poison_memory(const void *address, size_t size, u8 value) > -{ > - hw_set_mem_tag_range(kasan_reset_tag(address), > - round_up(size, KASAN_GRANULE_SIZE), value); > -} > - > void kasan_unpoison_memory(const void *address, size_t size) > { > hw_set_mem_tag_range(kasan_reset_tag(address), > round_up(size, KASAN_GRANULE_SIZE), get_tag(address)); > } > > -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); > -} > - > void kasan_set_free_info(struct kmem_cache *cache, > void *object, u8 tag) > { > diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h > index 7498839a15d3..ab7314418604 100644 > --- a/mm/kasan/kasan.h > +++ b/mm/kasan/kasan.h > @@ -153,8 +153,6 @@ 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 kasan_poison_memory(const void *address, size_t size, u8 value); > - > #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) > > static inline const void *kasan_shadow_to_mem(const void *shadow_addr) > @@ -194,8 +192,6 @@ 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); > @@ -279,6 +275,30 @@ static inline u8 random_tag(void) > } > #endif > > +#ifdef CONFIG_KASAN_HW_TAGS > + > +static inline void kasan_poison_memory(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 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 kasan_poison_memory(const void *address, size_t size, u8 value); > +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. > -- > 2.29.2.222.g5d2a92d10f8-goog > > -- > You received this message because you are subscribed to the Google Groups > "kasan-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/kasan-dev/e14ac53d7c43b4381ad94665c63a154dffc04b6b.1605046662.git.andreyknvl%40google.com.
