From: Peter Zijlstra <peterz@infradead.org>
To: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Thomas Garnier <thgarnie@chromium.org>,
kernel-hardening@lists.openwall.com, kristen@linux.intel.com,
Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>,
"H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Andy Lutomirski <luto@kernel.org>,
Juergen Gross <jgross@suse.com>,
Thomas Hellstrom <thellstrom@vmware.com>,
"VMware, Inc." <pv-drivers@vmware.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
Will Deacon <will@kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Jiri Slaby <jslaby@suse.cz>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Cao jin <caoj.fnst@cn.fujitsu.com>,
Allison Randal <allison@lohutok.net>,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
linux-pm@vger.kernel.org
Subject: Re: [PATCH v11 00/11] x86: PIE support to extend KASLR randomization
Date: Tue, 3 Mar 2020 10:55:14 +0100 [thread overview]
Message-ID: <20200303095514.GA2596@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <202003022100.54CEEE60F@keescook>
On Mon, Mar 02, 2020 at 09:02:15PM -0800, Kees Cook wrote:
> On Thu, Feb 27, 2020 at 04:00:45PM -0800, Thomas Garnier wrote:
> > Minor changes based on feedback and rebase from v10.
> >
> > Splitting the previous serie in two. This part contains assembly code
> > changes required for PIE but without any direct dependencies with the
> > rest of the patchset.
> >
> > Note: Using objtool to detect non-compliant PIE relocations is not yet
> > possible as this patchset only includes the simplest PIE changes.
> > Additional changes are needed in kvm, xen and percpu code.
> >
> > Changes:
> > - patch v11 (assembly);
> > - Fix comments on x86/entry/64.
> > - Remove KASLR PIE explanation on all commits.
> > - Add note on objtool not being possible at this stage of the patchset.
>
> This moves us closer to PIE in a clean first step. I think these patches
> look good to go, and unblock the work in kvm, xen, and percpu code. Can
> one of the x86 maintainers pick this series up?
But,... do we still need this in the light of that fine-grained kaslr
stuff?
What is the actual value of this PIE crud in the face of that?
next prev parent reply other threads:[~2020-03-03 9:56 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 0:00 [PATCH v11 00/11] x86: PIE support to extend KASLR randomization Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 01/11] x86/crypto: Adapt assembly for PIE support Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 02/11] x86: Add macro to get symbol address " Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 03/11] x86: relocate_kernel - Adapt assembly " Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 04/11] x86/entry/64: " Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 05/11] x86: pm-trace - " Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 06/11] x86/CPU: " Thomas Garnier
2020-03-03 4:58 ` Kees Cook
2020-02-28 0:00 ` [PATCH v11 07/11] x86/acpi: " Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 08/11] x86/boot/64: " Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 09/11] x86/power/64: " Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 10/11] x86/paravirt: " Thomas Garnier
2020-02-28 0:00 ` [PATCH v11 11/11] x86/alternatives: " Thomas Garnier
2020-03-03 4:59 ` Kees Cook
2020-03-03 5:02 ` [PATCH v11 00/11] x86: PIE support to extend KASLR randomization Kees Cook
2020-03-03 9:55 ` Peter Zijlstra [this message]
2020-03-03 15:43 ` Thomas Garnier
2020-03-03 21:01 ` Kristen Carlson Accardi
2020-03-03 21:19 ` Kees Cook
2020-03-04 9:21 ` Peter Zijlstra
2020-03-04 18:21 ` Kees Cook
2020-03-04 18:44 ` H. Peter Anvin
2020-03-04 19:19 ` Thomas Garnier
2020-03-04 19:22 ` H. Peter Anvin
2020-03-04 9:40 ` H. Peter Anvin
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