Commit 0937502a authored by Christoph Lameter's avatar Christoph Lameter Committed by Pekka Enberg
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slub: Add check for kfree() of non slab objects. 



We can detect kfree()s on non slab objects by checking for PageCompound().
Works in the same way as for ksize. This helped me catch an invalid
kfree().

Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
parent 4d3702b6

mm/slub.c

+1 −0
Original line number Diff line number Diff line
@@ -2766,6 +2766,7 @@ void kfree(const void *x) 


	page = virt_to_head_page(x);

	if (unlikely(!PageSlab(page))) {

		BUG_ON(!PageCompound(page));

		put_page(page);

		return;

	}