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authorMarco Elver <elver@google.com>2019-07-11 20:54:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-12 11:05:42 -0700
commit10d1f8cb3965a6f633bf23eb984cda552927e3a5 (patch)
treeb7b7ea9283290f231348c7b4880ef3453e48b098 /mm/slub.c
parentbb104ed78552147bed3a981fdada622afd2084b6 (diff)
downloadlinux-10d1f8cb3965a6f633bf23eb984cda552927e3a5.tar.bz2
mm/slab: refactor common ksize KASAN logic into slab_common.c
This refactors common code of ksize() between the various allocators into slab_common.c: __ksize() is the allocator-specific implementation without instrumentation, whereas ksize() includes the required KASAN logic. Link: http://lkml.kernel.org/r/20190626142014.141844-5-elver@google.com Signed-off-by: Marco Elver <elver@google.com> Acked-by: Christoph Lameter <cl@linux.com> Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slub.c')
-rw-r--r--mm/slub.c14
1 files changed, 2 insertions, 12 deletions
diff --git a/mm/slub.c b/mm/slub.c
index d46a91759b96..5e217653286c 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3895,7 +3895,7 @@ void __check_heap_object(const void *ptr, unsigned long n, struct page *page,
}
#endif /* CONFIG_HARDENED_USERCOPY */
-static size_t __ksize(const void *object)
+size_t __ksize(const void *object)
{
struct page *page;
@@ -3911,17 +3911,7 @@ static size_t __ksize(const void *object)
return slab_ksize(page->slab_cache);
}
-
-size_t ksize(const void *object)
-{
- size_t size = __ksize(object);
- /* We assume that ksize callers could use whole allocated area,
- * so we need to unpoison this area.
- */
- kasan_unpoison_shadow(object, size);
- return size;
-}
-EXPORT_SYMBOL(ksize);
+EXPORT_SYMBOL(__ksize);
void kfree(const void *x)
{