On Thu, Apr 14, 2016 at 1:01 PM, Pavel Machek <pavel@xxxxxxx> wrote: > Hi! > >> Since kASLR and Hibernation can not currently coexist at runtime >> on x86, the default behavior was to disable kASLR by default when >> CONFIG_HIBERNATION was present (to retain original behavior). >> >> The behavior of kASLR on arm64 (and soon MIPS) is to be enabled by >> default when selected at build time. Since arm64 Hibernation does not >> conflict with kASLR, this fixes the hibernation argument parsing to be >> x86-specific. Additionally, since end users want to be able to select >> kASLR on x86 by default at build time, create CONFIG_RANDOMIZE_BASE_ON >> that is present only on x86. >> >> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> > > I believe this is bad idea. arm64 shows that kaslr and hibernation can > coexist, and hibernation is still useful when your battery runs out. What? I'm confused -- this patch leaves the x86 behavior as-is by default but allows hibernation to work with arm64. (For example, right now, if you boot arm64 with "kaslr" kernel argument, hibernation will get needlessly disabled.) -Kees -- Kees Cook Chrome OS & Brillo Security -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
