Messages in this thread | | | Date | Fri, 5 Apr 2013 13:01:04 -0700 | Subject | Re: [PATCH 3/3] x86: kernel base offset ASLR | From | Yinghai Lu <> |
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On Thu, Apr 4, 2013 at 1:21 PM, H. Peter Anvin <hpa@zytor.com> wrote: > I have to admit to being somewhat skeptical toward KASLR with only 8 > bits of randomness. There are at least two potential ways of > dramatically increasing the available randomness: > > 1. actually compose the kernel of multiple independently relocatable > pieces (maybe chunk it on 2M boundaries or something.) > > 2. compile the kernel as one of the memory models which can be executed > anywhere in the 64-bit address space. The cost of this would have > to be quantified, of course.
Why just let bootloader to load kernel on random address instead?
For our 64bit bzImage, boot loader could load kernel to anywhere above 4G.
Thanks
Yinghai
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