slub: fix ksize() for zero-sized pointers
The slab and slob allocators already did this right, but slub would call "get_object_page()" on the magic ZERO_SIZE_PTR, with all kinds of nasty end results. Noted by Ingo Molnar. Cc: Ingo Molnar <mingo@elte.hu> Cc: Christoph Lameter <clameter@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -2394,7 +2394,7 @@ size_t ksize(const void *object)
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struct page *page;
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struct page *page;
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struct kmem_cache *s;
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struct kmem_cache *s;
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if (object == ZERO_SIZE_PTR)
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if (ZERO_OR_NULL_PTR(object))
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return 0;
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return 0;
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page = get_object_page(object);
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page = get_object_page(object);
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