Commit 76994412 authored May 22, 2008 by Pekka Enberg

slub: ksize() abuse checks



Add a WARN_ON for pages that don't have PageSlab nor PageCompound set to catch
the worst abusers of ksize() in the kernel.

Acked-by: Christoph Lameter <clameter@sgi.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

parent 239f49c0

mm/slub.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -2726,9 +2726,10 @@ size_t ksize(const void *object)

		page = virt_to_head_page(object);

		if (unlikely(!PageSlab(page)))
		if (unlikely(!PageSlab(page))) {
		WARN_ON(!PageCompound(page));
		return PAGE_SIZE << compound_order(page);

		}
		s = page->slab;

		#ifdef CONFIG_SLUB_DEBUG