From: Peter Zijlstra <peterz@infradead.org>
To: "Reshetova, Elena" <elena.reshetova@intel.com>
Cc: "kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
"luto@kernel.org" <luto@kernel.org>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"bp@alien8.de" <bp@alien8.de>,
"keescook@chromium.org" <keescook@chromium.org>,
"tytso@mit.edu" <tytso@mit.edu>
Subject: Re: [RFC PATCH] x86/entry/64: randomize kernel stack offset upon system call
Date: Fri, 8 Feb 2019 16:15:02 +0100 [thread overview]
Message-ID: <20190208151502.GC32494@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <2236FBA76BA1254E88B949DDB74E612BA4BB7580@IRSMSX102.ger.corp.intel.com>
On Fri, Feb 08, 2019 at 01:20:09PM +0000, Reshetova, Elena wrote:
> > On Fri, Feb 08, 2019 at 02:15:49PM +0200, Elena Reshetova wrote:
> I can measure the impact with rdtsc(), I think it is *very* small.
> Btw, what should be the good measurement test?
> I am not that happy with just looping on fopen-fclose, too
> much noise.
IIRC amluto had a nice micro-bench for 'pure' syscall overhead
somewhere.
Something like getpid/gettid in a loop should work fairly well, that's a
really light syscall to make.
next prev parent reply other threads:[~2019-02-08 15:15 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-08 12:15 [RFC PATCH] Early version of thread stack randomization Elena Reshetova
2019-02-08 12:15 ` [RFC PATCH] x86/entry/64: randomize kernel stack offset upon system call Elena Reshetova
2019-02-08 13:05 ` Peter Zijlstra
2019-02-08 13:20 ` Reshetova, Elena
2019-02-08 14:26 ` Peter Zijlstra
2019-02-09 11:13 ` Reshetova, Elena
2019-02-09 18:25 ` Andy Lutomirski
2019-02-11 6:39 ` Reshetova, Elena
2019-02-11 15:54 ` Andy Lutomirski
2019-02-12 10:16 ` Perla, Enrico
2019-02-14 7:52 ` Reshetova, Elena
2019-02-19 14:47 ` Jann Horn
2019-02-20 22:20 ` Kees Cook
2019-02-21 6:37 ` Andy Lutomirski
2019-02-21 13:20 ` Jann Horn
2019-02-21 15:49 ` Andy Lutomirski
2019-02-20 22:15 ` Kees Cook
2019-02-20 22:53 ` Kees Cook
2019-02-21 23:29 ` Kees Cook
2019-02-27 11:03 ` Reshetova, Elena
2019-02-21 9:35 ` Perla, Enrico
2019-02-21 17:23 ` Kees Cook
2019-02-21 17:48 ` Perla, Enrico
2019-02-21 19:18 ` Kees Cook
2019-02-20 21:51 ` Kees Cook
2019-02-08 15:15 ` Peter Zijlstra [this message]
2019-02-09 11:38 ` Reshetova, Elena
2019-02-09 12:09 ` Greg KH
2019-02-11 6:05 ` Reshetova, Elena
2019-02-08 16:34 ` Andy Lutomirski
2019-02-20 22:03 ` Kees Cook
2019-02-08 21:28 ` Kees Cook
2019-02-11 12:47 ` Reshetova, Elena
2019-02-20 22:04 ` Kees Cook
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190208151502.GC32494@hirez.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=bp@alien8.de \
--cc=elena.reshetova@intel.com \
--cc=keescook@chromium.org \
--cc=kernel-hardening@lists.openwall.com \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=tytso@mit.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.