Re: [patch 07/12] powerpc: Fix size check for hugetlbfs
From: David Gibson <hidden>
Date: 2007-08-14 07:56:39
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On Tue, Aug 14, 2007 at 12:29:18AM -0700, Greg KH wrote:
-stable review patch. If anyone has any objections, please let us know. ------------------ From: Benjamin Herrenschmidt <benh@kernel.crashing.org> My "slices" address space management code that was added in 2.6.22 implementation of get_unmapped_area() doesn't properly check that the size is a multiple of the requested page size. This allows userland to create VMAs that aren't a multiple of the huge page size with hugetlbfs (since hugetlbfs entirely relies on get_unmapped_area() to do that checking) which leads to a kernel BUG() when such areas are torn down. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <redacted> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: David Gibson <redacted> -- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson