On Mon, Apr 11, 2016 at 11:21 AM, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote: > On Mon, Apr 11, 2016 at 8:03 PM, Kees Cook <keescook@xxxxxxxxxxxx> wrote: >> On Mon, Apr 11, 2016 at 1:00 AM, James Morse <james.morse@xxxxxxx> wrote: >>> On 06/04/16 20:44, Kees Cook wrote: >>>> When building with both CONFIG_HIBERNATION and CONFIG_RANDOMIZE_BASE, >>>> one or the other must be chosen at boot-time. Until now, hibernation >>>> was selected when no choice was made on the command line. >>>> >>>> To make the security benefits of kASLR more widely available to end >>>> users (since the use of hibernation is becoming more rare and kASLR, >>>> already available on x86, will be available on arm64 and MIPS soon), >>>> this changes the default to preferring kASLR over hibernation. Users >>>> wanting hibernation can turn off kASLR by adding "nokaslr" to the kernel >>>> command line. >>> >>> While hibernate isn't yet merged for arm64, it does work with kASLR in v4.6-rc*, >>> it would be a shame to have to choose at boot time, (but that's my problem to >>> fix if/when its merged). >> >> Ah, interesting, so they work together on arm64? (i.e. you've actually >> tested a boot loader that provides the seed for kASLR to operate?) > > Probably the PS3 people can provide us with a good tool to generate a > seed that makes hibernation work all the time ;-) > > https://xkcd.com/221/ :) http://assets.amuniversal.com/321a39e06d6401301d80001dd8b71c47 -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
