From: Ingo Molnar <mingo@kernel.org>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Pavel Machek <pavel@denx.de>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Matt Redfearn <matt.redfearn@imgtec.com>,
Yves-Alexis Perez <corsac@debian.org>,
Emrah Demir <ed@abdsec.com>, Jonathan Corbet <corbet@lwn.net>,
the arch/x86 maintainers <x86@kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <len.brown@intel.com>, Borislav Petkov <bp@suse.de>,
Andy Lutomirski <luto@kernel.org>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>
Subject: Re: [PATCH] Prefer kASLR over Hibernation
Date: Thu, 7 Apr 2016 02:49:58 +0200 [thread overview]
Message-ID: <20160407004958.GA27130@gmail.com> (raw)
In-Reply-To: <CAJZ5v0h4uShH_r6=osGYZ_ZH_qjL7KufnEiZ8auHQhKRzRyC1Q@mail.gmail.com>
* Rafael J. Wysocki <rafael@kernel.org> wrote:
> [...]
>
> One of the weak points is the final jump, because it has to be done to the
> physical location of the image kernel's entry point even though the virtual
> addresses of it may differ between the boot and the image kernels. The seed is
> not needed for that, only the physical address of the entry point. The boot
> kernel doesn't have it today, though, because the virtual address of that is
> passed in the image header. That should not be too difficult to change, however.
I didn't realize we jumped to the image kernel as well - I (wrongly) assumed we
kept the bootup kernel. That should indeed make hibernation mostly
kASLR-invariant.
Thanks,
Ingo
next prev parent reply other threads:[~2016-04-07 0:49 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-06 19:44 [PATCH] Prefer kASLR over Hibernation Kees Cook
2016-04-06 20:17 ` Pavel Machek
2016-04-06 20:56 ` Linus Torvalds
2016-04-06 21:25 ` Kees Cook
2016-04-06 21:48 ` Ingo Molnar
2016-04-06 21:52 ` Ingo Molnar
2016-04-06 22:32 ` Rafael J. Wysocki
2016-04-07 0:49 ` Ingo Molnar [this message]
2016-04-06 21:49 ` Rafael J. Wysocki
2016-04-06 21:56 ` Ingo Molnar
2016-04-06 22:04 ` Rafael J. Wysocki
2016-04-06 22:16 ` Kees Cook
2016-04-06 22:41 ` Paul Bolle
2016-04-07 0:05 ` Ingo Molnar
2016-04-11 8:00 ` James Morse
2016-04-11 18:03 ` Kees Cook
2016-04-11 18:21 ` Geert Uytterhoeven
2016-04-11 18:47 ` Kees Cook
2016-04-12 17:51 ` James Morse
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