On Sat, 2013-02-09 at 00:06 +0100, Borislav Petkov wrote: > On Fri, Feb 08, 2013 at 02:30:52PM -0800, H. Peter Anvin wrote: > > Also, keep in mind that there is a very simple way to deny MSR access > > completely, which is to not include the driver in your kernel (and not > > allow module loading, but if you can load modules you can just load a > > module to muck with whatever MSR you want.) > > I was contemplating that too. What is the use case of having > msr.ko in a secure boot environment? Isn't that an all-no-tools, > you-can't-do-sh*t-except-what-you're-explicitly-allowed-to environment which > simply doesn't need to write MSRs in the first place?
Well, sure, distributions could build every kernel twice. That seems a little excessive, though.
