Messages in this thread Patch in this message | | | From | chengang@emindsof ... | Subject | [PATCH] include/linux/kasan.h: Notice about 0 for kasan_[dis/en]able_current() | Date | Mon, 2 May 2016 13:35:48 +0800 |
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From: Chen Gang <chengang@emindsoft.com.cn>
According to their comments and the kasan_depth's initialization, if kasan_depth is zero, it means disable. So kasan_depth need consider about the 0 overflow.
Also remove useless comments for dummy kasan_slab_free().
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> --- include/linux/kasan.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/include/linux/kasan.h b/include/linux/kasan.h index 645c280..37fab04 100644 --- a/include/linux/kasan.h +++ b/include/linux/kasan.h @@ -32,13 +32,15 @@ static inline void *kasan_mem_to_shadow(const void *addr) /* Enable reporting bugs after kasan_disable_current() */ static inline void kasan_enable_current(void) { - current->kasan_depth++; + if (current->kasan_depth + 1) + current->kasan_depth++; } /* Disable reporting bugs for current task */ static inline void kasan_disable_current(void) { - current->kasan_depth--; + if (current->kasan_depth) + current->kasan_depth--; } void kasan_unpoison_shadow(const void *address, size_t size); @@ -113,8 +115,6 @@ static inline void kasan_krealloc(const void *object, size_t new_size, static inline void kasan_slab_alloc(struct kmem_cache *s, void *object, gfp_t flags) {} -/* kasan_slab_free() returns true if the object has been put into quarantine. - */ static inline bool kasan_slab_free(struct kmem_cache *s, void *object) { return false; -- 1.9.3
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