SLUB's ksize() fails for size > 2048
I can't pass memory allocated by kmalloc() to ksize() if it is allocated by SLUB allocator and size is larger than (I guess) PAGE_SIZE / 2. The error of ksize() seems to be that it does not check if the allocation was made by SLUB or the page allocator. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Christoph Lameter <clameter@sgi.com>, Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -2558,8 +2558,12 @@ size_t ksize(const void *object)
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if (unlikely(object == ZERO_SIZE_PTR))
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return 0;
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page = get_object_page(object);
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page = virt_to_head_page(object);
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BUG_ON(!page);
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if (unlikely(!PageSlab(page)))
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return PAGE_SIZE << compound_order(page);
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s = page->slab;
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BUG_ON(!s);
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