Commits
H. Peter Anvin committed e8236c4d933
x86, kaslr: Add a circular multiply for better bit diffusion If we don't have RDRAND (in which case nothing else *should* matter), most sources have a highly biased entropy distribution. Use a circular multiply to diffuse the entropic bits. A circular multiply is a good operation for this: it is cheap on standard hardware and because it is symmetric (unlike an ordinary multiply) it doesn't introduce its own bias. Cc: Kees Cook <keescook@chromium.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/r/20131111222839.GA28616@www.outflux.net