On Mon, 16 Mar 2015, Matthew Garrett wrote: > > - All suspend/resumes allow modifying the kernel. I can boot Linux > > suspend, boot windows, modify the Linux restore image, boot Linux and > > own the box. You would need to sign the resume image somehow I think or > > just disable all suspend/resume > > I'm kind of torn on this - yes, there are deployment scenarios where > hibernation can be used to circumvent the restrictions, but there are > also scenarios where that can be avoided (eg, the bootloader verifies > some state with respect to the hibernation image).
[ adding Joey to CC ] Just for completness -- there is a way around this: https://lkml.org/lkml/2013/9/14/183 The series is not really the optimal one, as Alan Stern later figured out that symmetric cryptography is strong enough to achieve the same goal, but I am not sure whether Joey implemented that idea already. -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/