[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [kernel-hardening] Re: [PATCH] x86: make IDT read-only
On Tue, Apr 9, 2013 at 11:50 AM, H. Peter Anvin <hpa@xxxxxxxxx> wrote: > On 04/09/2013 11:46 AM, Kees Cook wrote: >> >> Ah-ha! Yes, I see now when comparing the debug/kernel_page_tables >> reports. It's just the High Kernel Mapping that we care about. >> Addresses outside that range are less of a leak. Excellent, then GDT >> may not be a problem. Whew. >> > > It does beg the question if we need to randomize kmalloc... which could > have issues by itself. Agreed, but this should be a separate issue. As is the fact that GDT is writable and a discoverable target. -Kees -- Kees Cook Chrome OS Security _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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