Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1379287
| From | Kees Cook <keescook@chromium.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2] kaslr: allow kASLR to be default over Hibernation |
| Date | 2016-04-14 22:20 +0200 |
| Message-ID | <rnVU6-7Po-17@gated-at.bofh.it> (permalink) |
| References | <rneP8-6Cz-9@gated-at.bofh.it> <rnVKp-7KX-13@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Apr 14, 2016 at 1:01 PM, Pavel Machek <pavel@denx.de> 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@chromium.org> > > 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
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH v2] kaslr: allow kASLR to be default over Hibernation Kees Cook <keescook@chromium.org> - 2016-04-13 00:20 +0200
Re: [PATCH v2] kaslr: allow kASLR to be default over Hibernation Pavel Machek <pavel@denx.de> - 2016-04-14 22:10 +0200
Re: [PATCH v2] kaslr: allow kASLR to be default over Hibernation Kees Cook <keescook@chromium.org> - 2016-04-14 22:20 +0200
Re: [PATCH v2] kaslr: allow kASLR to be default over Hibernation Pavel Machek <pavel@denx.de> - 2016-04-14 22:40 +0200
Re: [PATCH v2] kaslr: allow kASLR to be default over Hibernation Kees Cook <keescook@chromium.org> - 2016-04-15 00:50 +0200
Re: [PATCH v2] kaslr: allow kASLR to be default over Hibernation Ingo Molnar <mingo@kernel.org> - 2016-04-15 11:30 +0200
Re: [PATCH v2] kaslr: allow kASLR to be default over Hibernation Pavel Machek <pavel@denx.de> - 2016-04-15 15:10 +0200
csiph-web