diff mbox series

[v2,14/20] kasan, mm: rename kasan_poison_kfree

Message ID ee33aa1d9c57c3f2b2c700e8f2c6c24db8703612.1605046662.git.andreyknvl@google.com (mailing list archive)
State New, archived
Headers show
Series kasan: boot parameters for hardware tag-based mode | expand

Commit Message

Andrey Konovalov Nov. 10, 2020, 10:20 p.m. UTC 
Rename kasan_poison_kfree() to kasan_slab_free_mempool() as it better
reflects what this annotation does.

No functional changes.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Link: https://linux-review.googlesource.com/id/I5026f87364e556b506ef1baee725144bb04b8810
---
 include/linux/kasan.h | 16 ++++++++--------
 mm/kasan/common.c     | 16 ++++++++--------
 mm/mempool.c          |  2 +-
 3 files changed, 17 insertions(+), 17 deletions(-)

Comments

Marco Elver Nov. 11, 2020, 6:53 p.m. UTC | #1 
On Tue, Nov 10, 2020 at 11:20PM +0100, Andrey Konovalov wrote:
> Rename kasan_poison_kfree() to kasan_slab_free_mempool() as it better
> reflects what this annotation does.

This function is again so simple, and now it seems it's mempool
specific, can't we just remove it and open-code it in mempool.c?

> No functional changes.
> 
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
> Link: https://linux-review.googlesource.com/id/I5026f87364e556b506ef1baee725144bb04b8810
> ---
>  include/linux/kasan.h | 16 ++++++++--------
>  mm/kasan/common.c     | 16 ++++++++--------
>  mm/mempool.c          |  2 +-
>  3 files changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/include/linux/kasan.h b/include/linux/kasan.h
> index 779f8e703982..534ab3e2935a 100644
> --- a/include/linux/kasan.h
> +++ b/include/linux/kasan.h
> @@ -177,6 +177,13 @@ static inline bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned
>  	return false;
>  }
>  
> +void __kasan_slab_free_mempool(void *ptr, unsigned long ip);
> +static inline void kasan_slab_free_mempool(void *ptr, unsigned long ip)
> +{
> +	if (kasan_enabled())
> +		__kasan_slab_free_mempool(ptr, ip);
> +}
> +
>  void * __must_check __kasan_slab_alloc(struct kmem_cache *s,
>  				       void *object, gfp_t flags);
>  static inline void * __must_check kasan_slab_alloc(struct kmem_cache *s,
> @@ -217,13 +224,6 @@ static inline void * __must_check kasan_krealloc(const void *object,
>  	return (void *)object;
>  }
>  
> -void __kasan_poison_kfree(void *ptr, unsigned long ip);
> -static inline void kasan_poison_kfree(void *ptr, unsigned long ip)
> -{
> -	if (kasan_enabled())
> -		__kasan_poison_kfree(ptr, ip);
> -}
> -
>  void __kasan_kfree_large(void *ptr, unsigned long ip);
>  static inline void kasan_kfree_large(void *ptr, unsigned long ip)
>  {
> @@ -263,6 +263,7 @@ static inline bool kasan_slab_free(struct kmem_cache *s, void *object,
>  {
>  	return false;
>  }
> +static inline void kasan_slab_free_mempool(void *ptr, unsigned long ip) {}
>  static inline void *kasan_slab_alloc(struct kmem_cache *s, void *object,
>  				   gfp_t flags)
>  {
> @@ -282,7 +283,6 @@ static inline void *kasan_krealloc(const void *object, size_t new_size,
>  {
>  	return (void *)object;
>  }
> -static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {}
>  static inline void kasan_kfree_large(void *ptr, unsigned long ip) {}
>  
>  #endif /* CONFIG_KASAN */
> diff --git a/mm/kasan/common.c b/mm/kasan/common.c
> index 819403548f2e..60793f8695a8 100644
> --- a/mm/kasan/common.c
> +++ b/mm/kasan/common.c
> @@ -336,6 +336,14 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip)
>  	return ____kasan_slab_free(cache, object, ip, true);
>  }
>  
> +void __kasan_slab_free_mempool(void *ptr, unsigned long ip)
> +{
> +	struct page *page;
> +
> +	page = virt_to_head_page(ptr);
> +	____kasan_slab_free(page->slab_cache, ptr, ip, false);
> +}
> +
>  static void set_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
>  {
>  	kasan_set_track(&kasan_get_alloc_meta(cache, object)->alloc_track, flags);
> @@ -427,14 +435,6 @@ void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flag
>  						flags, true);
>  }
>  
> -void __kasan_poison_kfree(void *ptr, unsigned long ip)
> -{
> -	struct page *page;
> -
> -	page = virt_to_head_page(ptr);
> -	____kasan_slab_free(page->slab_cache, ptr, ip, false);
> -}
> -
>  void __kasan_kfree_large(void *ptr, unsigned long ip)
>  {
>  	if (ptr != page_address(virt_to_head_page(ptr)))
> diff --git a/mm/mempool.c b/mm/mempool.c
> index f473cdddaff0..b1f39fa75ade 100644
> --- a/mm/mempool.c
> +++ b/mm/mempool.c
> @@ -104,7 +104,7 @@ static inline void poison_element(mempool_t *pool, void *element)
>  static __always_inline void kasan_poison_element(mempool_t *pool, void *element)
>  {
>  	if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
> -		kasan_poison_kfree(element, _RET_IP_);
> +		kasan_slab_free_mempool(element, _RET_IP_);

This is already a kasan-prefixed function, so if
kasan_slab_free_mempool() is only ever called in this function, we
should just call kasan_slab_free() here directly with the 2 extra args
it requires open-coded.

>  	else if (pool->alloc == mempool_alloc_pages)
>  		kasan_free_pages(element, (unsigned long)pool->pool_data);
>  }

Thanks,
-- Marco
Andrey Konovalov Nov. 12, 2020, 1:05 a.m. UTC | #2 
On Wed, Nov 11, 2020 at 7:53 PM Marco Elver <elver@google.com> wrote:
>
> On Tue, Nov 10, 2020 at 11:20PM +0100, Andrey Konovalov wrote:
> > Rename kasan_poison_kfree() to kasan_slab_free_mempool() as it better
> > reflects what this annotation does.
>
> This function is again so simple, and now it seems it's mempool
> specific, can't we just remove it and open-code it in mempool.c?

The simplification introduced in the previous patch is based on a
false assumption and will be reverted. Thus will keep this as a
separate function.

>
> > No functional changes.
> >
> > Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> > Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
> > Link: https://linux-review.googlesource.com/id/I5026f87364e556b506ef1baee725144bb04b8810
> > ---
> >  include/linux/kasan.h | 16 ++++++++--------
> >  mm/kasan/common.c     | 16 ++++++++--------
> >  mm/mempool.c          |  2 +-
> >  3 files changed, 17 insertions(+), 17 deletions(-)
> >
> > diff --git a/include/linux/kasan.h b/include/linux/kasan.h
> > index 779f8e703982..534ab3e2935a 100644
> > --- a/include/linux/kasan.h
> > +++ b/include/linux/kasan.h
> > @@ -177,6 +177,13 @@ static inline bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned
> >       return false;
> >  }
> >
> > +void __kasan_slab_free_mempool(void *ptr, unsigned long ip);
> > +static inline void kasan_slab_free_mempool(void *ptr, unsigned long ip)
> > +{
> > +     if (kasan_enabled())
> > +             __kasan_slab_free_mempool(ptr, ip);
> > +}
> > +
> >  void * __must_check __kasan_slab_alloc(struct kmem_cache *s,
> >                                      void *object, gfp_t flags);
> >  static inline void * __must_check kasan_slab_alloc(struct kmem_cache *s,
> > @@ -217,13 +224,6 @@ static inline void * __must_check kasan_krealloc(const void *object,
> >       return (void *)object;
> >  }
> >
> > -void __kasan_poison_kfree(void *ptr, unsigned long ip);
> > -static inline void kasan_poison_kfree(void *ptr, unsigned long ip)
> > -{
> > -     if (kasan_enabled())
> > -             __kasan_poison_kfree(ptr, ip);
> > -}
> > -
> >  void __kasan_kfree_large(void *ptr, unsigned long ip);
> >  static inline void kasan_kfree_large(void *ptr, unsigned long ip)
> >  {
> > @@ -263,6 +263,7 @@ static inline bool kasan_slab_free(struct kmem_cache *s, void *object,
> >  {
> >       return false;
> >  }
> > +static inline void kasan_slab_free_mempool(void *ptr, unsigned long ip) {}
> >  static inline void *kasan_slab_alloc(struct kmem_cache *s, void *object,
> >                                  gfp_t flags)
> >  {
> > @@ -282,7 +283,6 @@ static inline void *kasan_krealloc(const void *object, size_t new_size,
> >  {
> >       return (void *)object;
> >  }
> > -static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {}
> >  static inline void kasan_kfree_large(void *ptr, unsigned long ip) {}
> >
> >  #endif /* CONFIG_KASAN */
> > diff --git a/mm/kasan/common.c b/mm/kasan/common.c
> > index 819403548f2e..60793f8695a8 100644
> > --- a/mm/kasan/common.c
> > +++ b/mm/kasan/common.c
> > @@ -336,6 +336,14 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip)
> >       return ____kasan_slab_free(cache, object, ip, true);
> >  }
> >
> > +void __kasan_slab_free_mempool(void *ptr, unsigned long ip)
> > +{
> > +     struct page *page;
> > +
> > +     page = virt_to_head_page(ptr);
> > +     ____kasan_slab_free(page->slab_cache, ptr, ip, false);
> > +}
> > +
> >  static void set_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
> >  {
> >       kasan_set_track(&kasan_get_alloc_meta(cache, object)->alloc_track, flags);
> > @@ -427,14 +435,6 @@ void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flag
> >                                               flags, true);
> >  }
> >
> > -void __kasan_poison_kfree(void *ptr, unsigned long ip)
> > -{
> > -     struct page *page;
> > -
> > -     page = virt_to_head_page(ptr);
> > -     ____kasan_slab_free(page->slab_cache, ptr, ip, false);
> > -}
> > -
> >  void __kasan_kfree_large(void *ptr, unsigned long ip)
> >  {
> >       if (ptr != page_address(virt_to_head_page(ptr)))
> > diff --git a/mm/mempool.c b/mm/mempool.c
> > index f473cdddaff0..b1f39fa75ade 100644
> > --- a/mm/mempool.c
> > +++ b/mm/mempool.c
> > @@ -104,7 +104,7 @@ static inline void poison_element(mempool_t *pool, void *element)
> >  static __always_inline void kasan_poison_element(mempool_t *pool, void *element)
> >  {
> >       if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
> > -             kasan_poison_kfree(element, _RET_IP_);
> > +             kasan_slab_free_mempool(element, _RET_IP_);
>
> This is already a kasan-prefixed function, so if
> kasan_slab_free_mempool() is only ever called in this function, we
> should just call kasan_slab_free() here directly with the 2 extra args
> it requires open-coded.
>
> >       else if (pool->alloc == mempool_alloc_pages)
> >               kasan_free_pages(element, (unsigned long)pool->pool_data);
> >  }
>
> Thanks,
> -- Marco
diff mbox series

Patch

diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index 779f8e703982..534ab3e2935a 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -177,6 +177,13 @@  static inline bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned
 	return false;
 }
 
+void __kasan_slab_free_mempool(void *ptr, unsigned long ip);
+static inline void kasan_slab_free_mempool(void *ptr, unsigned long ip)
+{
+	if (kasan_enabled())
+		__kasan_slab_free_mempool(ptr, ip);
+}
+
 void * __must_check __kasan_slab_alloc(struct kmem_cache *s,
 				       void *object, gfp_t flags);
 static inline void * __must_check kasan_slab_alloc(struct kmem_cache *s,
@@ -217,13 +224,6 @@  static inline void * __must_check kasan_krealloc(const void *object,
 	return (void *)object;
 }
 
-void __kasan_poison_kfree(void *ptr, unsigned long ip);
-static inline void kasan_poison_kfree(void *ptr, unsigned long ip)
-{
-	if (kasan_enabled())
-		__kasan_poison_kfree(ptr, ip);
-}
-
 void __kasan_kfree_large(void *ptr, unsigned long ip);
 static inline void kasan_kfree_large(void *ptr, unsigned long ip)
 {
@@ -263,6 +263,7 @@  static inline bool kasan_slab_free(struct kmem_cache *s, void *object,
 {
 	return false;
 }
+static inline void kasan_slab_free_mempool(void *ptr, unsigned long ip) {}
 static inline void *kasan_slab_alloc(struct kmem_cache *s, void *object,
 				   gfp_t flags)
 {
@@ -282,7 +283,6 @@  static inline void *kasan_krealloc(const void *object, size_t new_size,
 {
 	return (void *)object;
 }
-static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {}
 static inline void kasan_kfree_large(void *ptr, unsigned long ip) {}
 
 #endif /* CONFIG_KASAN */
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 819403548f2e..60793f8695a8 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -336,6 +336,14 @@  bool __kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip)
 	return ____kasan_slab_free(cache, object, ip, true);
 }
 
+void __kasan_slab_free_mempool(void *ptr, unsigned long ip)
+{
+	struct page *page;
+
+	page = virt_to_head_page(ptr);
+	____kasan_slab_free(page->slab_cache, ptr, ip, false);
+}
+
 static void set_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
 {
 	kasan_set_track(&kasan_get_alloc_meta(cache, object)->alloc_track, flags);
@@ -427,14 +435,6 @@  void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flag
 						flags, true);
 }
 
-void __kasan_poison_kfree(void *ptr, unsigned long ip)
-{
-	struct page *page;
-
-	page = virt_to_head_page(ptr);
-	____kasan_slab_free(page->slab_cache, ptr, ip, false);
-}
-
 void __kasan_kfree_large(void *ptr, unsigned long ip)
 {
 	if (ptr != page_address(virt_to_head_page(ptr)))
diff --git a/mm/mempool.c b/mm/mempool.c
index f473cdddaff0..b1f39fa75ade 100644
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -104,7 +104,7 @@  static inline void poison_element(mempool_t *pool, void *element)
 static __always_inline void kasan_poison_element(mempool_t *pool, void *element)
 {
 	if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
-		kasan_poison_kfree(element, _RET_IP_);
+		kasan_slab_free_mempool(element, _RET_IP_);
 	else if (pool->alloc == mempool_alloc_pages)
 		kasan_free_pages(element, (unsigned long)pool->pool_data);
 }